//========================================================================
//
// Annot.cc
//
// Copyright 2000-2003 Glyph & Cog, LLC
//
//========================================================================

//========================================================================
//
// Modified under the Poppler project - http://poppler.freedesktop.org
//
// All changes made under the Poppler project to this file are licensed
// under GPL version 2 or later
//
// Copyright (C) 2006 Scott Turner <scotty1024@mac.com>
// Copyright (C) 2007, 2008 Julien Rebetez <julienr@svn.gnome.org>
// Copyright (C) 2007-2013, 2015-2026 Albert Astals Cid <aacid@kde.org>
// Copyright (C) 2007-2013, 2018 Carlos Garcia Campos <carlosgc@gnome.org>
// Copyright (C) 2007, 2008 Iñigo Martínez <inigomartinez@gmail.com>
// Copyright (C) 2007 Jeff Muizelaar <jeff@infidigm.net>
// Copyright (C) 2008, 2011 Pino Toscano <pino@kde.org>
// Copyright (C) 2008 Michael Vrable <mvrable@cs.ucsd.edu>
// Copyright (C) 2008 Hugo Mercier <hmercier31@gmail.com>
// Copyright (C) 2009 Ilya Gorenbein <igorenbein@finjan.com>
// Copyright (C) 2011, 2013, 2019 José Aliste <jaliste@src.gnome.org>
// Copyright (C) 2012, 2013 Fabio D'Urso <fabiodurso@hotmail.it>
// Copyright (C) 2012, 2013 Thomas Freitag <Thomas.Freitag@alfa.de>
// Copyright (C) 2012, 2015 Tobias Koenig <tokoe@kdab.com>
// Copyright (C) 2013 Peter Breitenlohner <peb@mppmu.mpg.de>
// Copyright (C) 2013, 2017 Adrian Johnson <ajohnson@redneon.com>
// Copyright (C) 2014, 2015 Marek Kasik <mkasik@redhat.com>
// Copyright (C) 2014 Jiri Slaby <jirislaby@gmail.com>
// Copyright (C) 2014 Anuj Khare <khareanuj18@gmail.com>
// Copyright (C) 2015 Petr Gajdos <pgajdos@suse.cz>
// Copyright (C) 2015 Philipp Reinkemeier <philipp.reinkemeier@offis.de>
// Copyright (C) 2015 Tamas Szekeres <szekerest@gmail.com>
// Copyright (C) 2017 Hans-Ulrich Jüttner <huj@froreich-bioscientia.de>
// Copyright (C) 2018 Klarälvdalens Datakonsult AB, a KDAB Group company, <info@kdab.com>. Work sponsored by the LiMux project of the city of Munich
// Copyright 2018 Andre Heinecke <aheinecke@intevation.de>
// Copyright (C) 2018 Adam Reichold <adam.reichold@t-online.de>
// Copyright (C) 2018 Dileep Sankhla <sankhla.dileep96@gmail.com>
// Copyright (C) 2018-2020 Tobias Deiminger <haxtibal@posteo.de>
// Copyright (C) 2018-2020, 2022, 2024 Oliver Sander <oliver.sander@tu-dresden.de>
// Copyright (C) 2019 Umang Malik <umang99m@gmail.com>
// Copyright (C) 2019 João Netto <joaonetto901@gmail.com>
// Copyright (C) 2020, 2024 Klarälvdalens Datakonsult AB, a KDAB Group company, <info@kdab.com>. Work sponsored by Technische Universität Dresden
// Copyright (C) 2020 Katarina Behrens <Katarina.Behrens@cib.de>
// Copyright (C) 2020 Thorsten Behrens <Thorsten.Behrens@CIB.de>
// Copyright (C) 2020, 2025 Nelson Benítez León <nbenitezl@gmail.com>
// Copyright (C) 2021 Klarälvdalens Datakonsult AB, a KDAB Group company, <info@kdab.com>.
// Copyright (C) 2021 Zachary Travis <ztravis@everlaw.com>
// Copyright (C) 2021 Mahmoud Ahmed Khalil <mahmoudkhalil11@gmail.com>
// Copyright (C) 2021 Georgiy Sgibnev <georgiy@sgibnev.com>. Work sponsored by lab50.net.
// Copyright (C) 2022 Martin <martinbts@gmx.net>
// Copyright (C) 2022 Andreas Naumann <42870-ANaumann85@users.noreply.gitlab.freedesktop.org>
// Copyright (C) 2022, 2024 Erich E. Hoover <erich.e.hoover@gmail.com>
// Copyright (C) 2023-2026 g10 Code GmbH, Author: Sune Stolborg Vuorela <sune@vuorela.dk>
// Copyright (C) 2024 Pratham Gandhi <ppg.1382@gmail.com>
// Copyright (C) 2024 Carsten Emde <ce@ceek.de>
// Copyright (C) 2024-2026 Lucas Baudin <lucas.baudin@ensae.fr>
// Copyright (C) 2025 Juraj Šarinay <juraj@sarinay.com>
// Copyright (C) 2025 Aditya Tiwari <suntiwari3495@gmail.com>
// Copyright (C) 2025 Arnav V <arnav0872@gmail.com>
// Copyright (C) 2026 Adam Sampson <ats@offog.org>
// Copyright (C) 2026 Stefan Brüns <stefan.bruens@rwth-aachen.de>
//
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
//
//========================================================================

#include <config.h>

#include <cstdlib>
#include <cmath>
#include <cassert>
#include <numbers>
#include "goo/gstrtod.h"
#include "Error.h"
#include "Object.h"
#include "Catalog.h"
#include "Gfx.h"
#include "Lexer.h"
#include "PDFDoc.h"
#include "Page.h"
#include "Annot.h"
#include "GfxFont.h"
#include "CharCodeToUnicode.h"
#include "PDFDocEncoding.h"
#include "Form.h"
#include "XRef.h"
#include "Movie.h"
#include "OptionalContent.h"
#include "Sound.h"
#include "DateInfo.h"
#include "Link.h"
#include "UTF.h"
#include <cstring>
#include <algorithm>
#include <utility>

#include "annot_stamp_approved.h"
#include "annot_stamp_as_is.h"
#include "annot_stamp_confidential.h"
#include "annot_stamp_departmental.h"
#include "annot_stamp_final.h"
#include "annot_stamp_for_comment.h"
#include "annot_stamp_experimental.h"
#include "annot_stamp_expired.h"
#include "annot_stamp_not_approved.h"
#include "annot_stamp_not_for_public_release.h"
#include "annot_stamp_sold.h"
#include "annot_stamp_top_secret.h"
#include "annot_stamp_for_public_release.h"
#include "annot_stamp_draft.h"

// distance of Bezier control point from center for circle approximation
// TODO uncomment when we can depend on C++26
// constexpr double bezierCircle = (4 * (sqrt(2) - 1) / 3);
constexpr double bezierCircle = 0.55228475;

static AnnotLineEndingStyle parseAnnotLineEndingStyle(const Object &name)
{
    if (!name.isName()) {
        return annotLineEndingNone;
    }

    if (name.isName("Square")) {
        return annotLineEndingSquare;
    }
    if (name.isName("Circle")) {
        return annotLineEndingCircle;
    }
    if (name.isName("Diamond")) {
        return annotLineEndingDiamond;
    }
    if (name.isName("OpenArrow")) {
        return annotLineEndingOpenArrow;
    }
    if (name.isName("ClosedArrow")) {
        return annotLineEndingClosedArrow;
    }
    if (name.isName("Butt")) {
        return annotLineEndingButt;
    }
    if (name.isName("ROpenArrow")) {
        return annotLineEndingROpenArrow;
    }
    if (name.isName("RClosedArrow")) {
        return annotLineEndingRClosedArrow;
    }
    if (name.isName("Slash")) {
        return annotLineEndingSlash;
    }
    return annotLineEndingNone;
}

static const char *convertAnnotLineEndingStyle(AnnotLineEndingStyle style)
{
    switch (style) {
    case annotLineEndingSquare:
        return "Square";
    case annotLineEndingCircle:
        return "Circle";
    case annotLineEndingDiamond:
        return "Diamond";
    case annotLineEndingOpenArrow:
        return "OpenArrow";
    case annotLineEndingClosedArrow:
        return "ClosedArrow";
    case annotLineEndingButt:
        return "Butt";
    case annotLineEndingROpenArrow:
        return "ROpenArrow";
    case annotLineEndingRClosedArrow:
        return "RClosedArrow";
    case annotLineEndingSlash:
        return "Slash";
    default:
        return "None";
    }
}

static AnnotExternalDataType parseAnnotExternalData(Dict *dict)
{
    AnnotExternalDataType type;

    Object obj1 = dict->lookup("Subtype");
    if (obj1.isName()) {
        const std::string &typeName = obj1.getNameString();

        if (typeName == "Markup3D") {
            type = annotExternalDataMarkup3D;
        } else {
            type = annotExternalDataMarkupUnknown;
        }
    } else {
        type = annotExternalDataMarkupUnknown;
    }

    return type;
}

static std::unique_ptr<PDFRectangle> parseDiffRectangle(Array *array, PDFRectangle *rect)
{
    if (array->getLength() == 4) {
        // deltas
        const double dx1 = array->get(0).getNumWithDefaultValue(0);
        const double dy1 = array->get(1).getNumWithDefaultValue(0);
        const double dx2 = array->get(2).getNumWithDefaultValue(0);
        const double dy2 = array->get(3).getNumWithDefaultValue(0);

        // checking that the numbers are valid (i.e. >= 0),
        // and that applying the differences still give us a valid rect
        if (dx1 >= 0 && dy1 >= 0 && dx2 >= 0 && dy2 && (rect->x2 - rect->x1 - dx1 - dx2) >= 0 && (rect->y2 - rect->y1 - dy1 - dy2) >= 0) {
            auto newRect = std::make_unique<PDFRectangle>();
            newRect->x1 = rect->x1 + dx1;
            newRect->y1 = rect->y1 + dy1;
            newRect->x2 = rect->x2 - dx2;
            newRect->y2 = rect->y2 - dy2;
            return newRect;
        }
    }
    return nullptr;
}

static std::unique_ptr<LinkAction> getAdditionalAction(Annot::AdditionalActionsType type, Object *additionalActions, PDFDoc *doc)
{
    Object additionalActionsObject = additionalActions->fetch(doc->getXRef());

    if (additionalActionsObject.isDict()) {
        const char *key = (type == Annot::actionCursorEntering          ? "E"
                                   : type == Annot::actionCursorLeaving ? "X"
                                   : type == Annot::actionMousePressed  ? "D"
                                   : type == Annot::actionMouseReleased ? "U"
                                   : type == Annot::actionFocusIn       ? "Fo"
                                   : type == Annot::actionFocusOut      ? "Bl"
                                   : type == Annot::actionPageOpening   ? "PO"
                                   : type == Annot::actionPageClosing   ? "PC"
                                   : type == Annot::actionPageVisible   ? "PV"
                                   : type == Annot::actionPageInvisible ? "PI"
                                                                        : nullptr);

        Object actionObject = additionalActionsObject.dictLookup(key);
        if (actionObject.isDict()) {
            return LinkAction::parseAction(&actionObject, doc->getCatalog()->getBaseURI());
        }
    }

    return nullptr;
}

static const char *getFormAdditionalActionKey(Annot::FormAdditionalActionsType type)
{
    return (type == Annot::actionFieldModified ? "K" : type == Annot::actionFormatField ? "F" : type == Annot::actionValidateField ? "V" : type == Annot::actionCalculateField ? "C" : nullptr);
}

static const char *determineFallbackFont(const std::string &tok, const char *defaultFallback)
{
    // TODO: adjust these based on other example PDFs.
    if (tok == "/ZaDb") {
        return "ZapfDingbats";
    }
    if (tok == "/Cour") {
        return "Courier";
    }
    if (tok == "/TiRo") {
        return "TimesNewRoman";
    }
    if (tok == "/Helvetica-Bold") {
        return "Helvetica-Bold";
    }
    return defaultFallback;
}

//------------------------------------------------------------------------
// AnnotBorderEffect
//------------------------------------------------------------------------

AnnotBorderEffect::AnnotBorderEffect(Dict *dict)
{
    Object obj1;

    obj1 = dict->lookup("S");
    if (obj1.isName()) {
        const std::string &effectName = obj1.getNameString();

        if (effectName == "C") {
            effectType = borderEffectCloudy;
        } else {
            effectType = borderEffectNoEffect;
        }
    } else {
        effectType = borderEffectNoEffect;
    }

    if (effectType == borderEffectCloudy) {
        intensity = dict->lookup("I").getNumWithDefaultValue(0);
    } else {
        intensity = 0;
    }
}

//------------------------------------------------------------------------
// AnnotPath
//------------------------------------------------------------------------

AnnotPath::AnnotPath() = default;

AnnotPath::AnnotPath(const Array &array)
{
    parsePathArray(array);
}

AnnotPath::AnnotPath(std::vector<AnnotCoord> &&coordsA)
{
    coords = std::move(coordsA);
}

AnnotPath::~AnnotPath() = default;

double AnnotPath::getX(int coord) const
{
    if (coord >= 0 && coord < getCoordsLength()) {
        return coords[coord].getX();
    }
    return 0;
}

double AnnotPath::getY(int coord) const
{
    if (coord >= 0 && coord < getCoordsLength()) {
        return coords[coord].getY();
    }
    return 0;
}

void AnnotPath::parsePathArray(const Array &array)
{
    if (array.getLength() % 2) {
        error(errSyntaxError, -1, "Bad Annot Path");
        return;
    }

    const auto tempLength = array.getLength() / 2;
    std::vector<AnnotCoord> tempCoords;
    tempCoords.reserve(tempLength);
    for (int i = 0; i < tempLength; i++) {
        double x = 0, y = 0;

        Object obj1 = array.get(i * 2);
        if (obj1.isNum()) {
            x = obj1.getNum();
        } else {
            return;
        }

        obj1 = array.get((i * 2) + 1);
        if (obj1.isNum()) {
            y = obj1.getNum();
        } else {
            return;
        }

        tempCoords.emplace_back(x, y);
    }

    coords = std::move(tempCoords);
}

//------------------------------------------------------------------------
// AnnotCalloutLine
//------------------------------------------------------------------------

AnnotCalloutLine::AnnotCalloutLine(double x1, double y1, double x2, double y2) : coord1(x1, y1), coord2(x2, y2) { }

AnnotCalloutLine::~AnnotCalloutLine() = default;

//------------------------------------------------------------------------
// AnnotCalloutMultiLine
//------------------------------------------------------------------------

AnnotCalloutMultiLine::AnnotCalloutMultiLine(double x1, double y1, double x2, double y2, double x3, double y3) : AnnotCalloutLine(x1, y1, x2, y2), coord3(x3, y3) { }

AnnotCalloutMultiLine::~AnnotCalloutMultiLine() = default;

//------------------------------------------------------------------------
// AnnotQuadrilateral
//------------------------------------------------------------------------

AnnotQuadrilaterals::AnnotQuadrilaterals(const Array &array)
{
    int arrayLength = array.getLength();
    int quadsLength = 0;
    double quadArray[8];

    // default values
    quadrilateralsLength = 0;

    if ((arrayLength % 8) == 0) {
        int i;

        quadsLength = arrayLength / 8;
        auto quads = std::make_unique<AnnotQuadrilateral[]>(quadsLength);
        for (i = 0; i < quadsLength; i++) {
            for (int j = 0; j < 8; j++) {
                Object obj = array.get(i * 8 + j);
                if (obj.isNum()) {
                    quadArray[j] = obj.getNum();
                } else {
                    error(errSyntaxError, -1, "Invalid QuadPoint in annot");
                    return;
                }
            }

            quads[i] = AnnotQuadrilateral(quadArray[0], quadArray[1], quadArray[2], quadArray[3], quadArray[4], quadArray[5], quadArray[6], quadArray[7]);
        }

        quadrilateralsLength = quadsLength;
        quadrilaterals = std::move(quads);
    }
}

AnnotQuadrilaterals::AnnotQuadrilaterals(std::unique_ptr<AnnotQuadrilateral[]> &&quads, int quadsLength)
{
    quadrilaterals = std::move(quads);
    quadrilateralsLength = quadsLength;
}

AnnotQuadrilaterals::~AnnotQuadrilaterals() = default;

double AnnotQuadrilaterals::getX1(int quadrilateral) const
{
    if (quadrilateral >= 0 && quadrilateral < quadrilateralsLength) {
        return quadrilaterals[quadrilateral].coord1.getX();
    }
    return 0;
}

double AnnotQuadrilaterals::getY1(int quadrilateral) const
{
    if (quadrilateral >= 0 && quadrilateral < quadrilateralsLength) {
        return quadrilaterals[quadrilateral].coord1.getY();
    }
    return 0;
}

double AnnotQuadrilaterals::getX2(int quadrilateral) const
{
    if (quadrilateral >= 0 && quadrilateral < quadrilateralsLength) {
        return quadrilaterals[quadrilateral].coord2.getX();
    }
    return 0;
}

double AnnotQuadrilaterals::getY2(int quadrilateral) const
{
    if (quadrilateral >= 0 && quadrilateral < quadrilateralsLength) {
        return quadrilaterals[quadrilateral].coord2.getY();
    }
    return 0;
}

double AnnotQuadrilaterals::getX3(int quadrilateral) const
{
    if (quadrilateral >= 0 && quadrilateral < quadrilateralsLength) {
        return quadrilaterals[quadrilateral].coord3.getX();
    }
    return 0;
}

double AnnotQuadrilaterals::getY3(int quadrilateral) const
{
    if (quadrilateral >= 0 && quadrilateral < quadrilateralsLength) {
        return quadrilaterals[quadrilateral].coord3.getY();
    }
    return 0;
}

double AnnotQuadrilaterals::getX4(int quadrilateral) const
{
    if (quadrilateral >= 0 && quadrilateral < quadrilateralsLength) {
        return quadrilaterals[quadrilateral].coord4.getX();
    }
    return 0;
}

double AnnotQuadrilaterals::getY4(int quadrilateral) const
{
    if (quadrilateral >= 0 && quadrilateral < quadrilateralsLength) {
        return quadrilaterals[quadrilateral].coord4.getY();
    }
    return 0;
}

AnnotQuadrilaterals::AnnotQuadrilateral::AnnotQuadrilateral() = default;

AnnotQuadrilaterals::AnnotQuadrilateral::AnnotQuadrilateral(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4) : coord1(x1, y1), coord2(x2, y2), coord3(x3, y3), coord4(x4, y4) { }

//------------------------------------------------------------------------
// AnnotBorder
//------------------------------------------------------------------------
AnnotBorder::AnnotBorder()
{
    width = 1;
    style = borderSolid;
}

bool AnnotBorder::parseDashArray(Object *dashObj)
{
    bool correct = true;
    const int tempLength = dashObj->arrayGetLength();
    std::vector<double> tempDash(tempLength);

    // TODO: check not all zero (Line Dash Pattern Page 217 PDF 8.1)
    for (int i = 0; i < tempLength && i < DASH_LIMIT && correct; i++) {
        const Object obj1 = dashObj->arrayGet(i);
        if (obj1.isNum()) {
            tempDash[i] = obj1.getNum();

            correct = tempDash[i] >= 0;
        } else {
            correct = false;
        }
    }

    if (correct) {
        dash = std::move(tempDash);
        style = borderDashed;
    }

    return correct;
}

AnnotBorder::~AnnotBorder() = default;

//------------------------------------------------------------------------
// AnnotBorderArray
//------------------------------------------------------------------------

AnnotBorderArray::AnnotBorderArray()
{
    horizontalCorner = 0;
    verticalCorner = 0;
}

AnnotBorderArray::AnnotBorderArray(const Array &array)
{
    Object obj1;
    int arrayLength = array.getLength();

    bool correct = true;
    if (arrayLength == 3 || arrayLength == 4) {
        // implementation note 81 in Appendix H.

        obj1 = array.get(0);
        if (obj1.isNum()) {
            horizontalCorner = obj1.getNum();
        } else {
            correct = false;
        }

        obj1 = array.get(1);
        if (obj1.isNum()) {
            verticalCorner = obj1.getNum();
        } else {
            correct = false;
        }

        obj1 = array.get(2);
        if (obj1.isNum()) {
            width = obj1.getNum();
        } else {
            correct = false;
        }

        if (arrayLength == 4) {
            obj1 = array.get(3);
            if (obj1.isArray()) {
                correct = parseDashArray(&obj1);
            } else {
                correct = false;
            }
        }
    } else {
        correct = false;
    }

    if (!correct) {
        width = 0;
    }
}

std::unique_ptr<AnnotBorder> AnnotBorderArray::copy() const
{
    auto *res = new AnnotBorderArray();
    res->type = type;
    res->width = width;
    res->dash = dash;
    res->style = style;
    res->horizontalCorner = horizontalCorner;
    res->verticalCorner = verticalCorner;
    return std::unique_ptr<AnnotBorder>(res);
}

Object AnnotBorderArray::writeToObject(XRef *xref) const
{
    auto borderArray = std::make_unique<Array>(xref);
    borderArray->add(Object(horizontalCorner));
    borderArray->add(Object(verticalCorner));
    borderArray->add(Object(width));

    if (!dash.empty()) {
        auto a = std::make_unique<Array>(xref);

        for (double d : dash) {
            a->add(Object(d));
        }

        borderArray->add(Object(std::move(a)));
    }

    return Object(std::move(borderArray));
}

//------------------------------------------------------------------------
// AnnotBorderBS
//------------------------------------------------------------------------

AnnotBorderBS::AnnotBorderBS() = default;

AnnotBorderBS::AnnotBorderBS(Dict *dict)
{
    // Border width (in points)
    Object obj1 = dict->lookup("W");
    width = obj1.getNumWithDefaultValue(1.0);

    // Border style
    obj1 = dict->lookup("S");
    if (obj1.isName()) {
        const std::string &styleName = obj1.getNameString();

        if (styleName == "S") {
            style = borderSolid;
        } else if (styleName == "D") {
            style = borderDashed;
        } else if (styleName == "B") {
            style = borderBeveled;
        } else if (styleName == "I") {
            style = borderInset;
        } else if (styleName == "U") {
            style = borderUnderlined;
        } else {
            style = borderSolid;
        }
    } else {
        style = borderSolid;
    }

    // Border dash style
    if (style == borderDashed) {
        obj1 = dict->lookup("D");
        if (!obj1.isArray() || !parseDashArray(&obj1)) {
            dash = { 3 };
        }
    }
}

const char *AnnotBorderBS::getStyleName() const
{
    switch (style) {
    case borderSolid:
        return "S";
    case borderDashed:
        return "D";
    case borderBeveled:
        return "B";
    case borderInset:
        return "I";
    case borderUnderlined:
        return "U";
    }

    return "S";
}

std::unique_ptr<AnnotBorder> AnnotBorderBS::copy() const
{
    auto *res = new AnnotBorderBS();
    res->type = type;
    res->width = width;
    res->dash = dash;
    res->style = style;
    return std::unique_ptr<AnnotBorder>(res);
}

Object AnnotBorderBS::writeToObject(XRef *xref) const
{
    auto dict = std::make_unique<Dict>(xref);
    dict->set("W", Object(width));
    dict->set("S", Object::name(getStyleName()));
    if (style == borderDashed && !dash.empty()) {
        auto a = std::make_unique<Array>(xref);

        for (double d : dash) {
            a->add(Object(d));
        }
        dict->set("D", Object(std::move(a)));
    }
    return Object(std::move(dict));
}

//------------------------------------------------------------------------
// AnnotColor
//------------------------------------------------------------------------

AnnotColor::AnnotColor()
{
    length = 0;
}

AnnotColor::AnnotColor(double gray)
{
    length = 1;

    values[0] = gray;
}

AnnotColor::AnnotColor(double r, double g, double b)
{
    length = 3;

    values[0] = r;
    values[1] = g;
    values[2] = b;
}

AnnotColor::AnnotColor(double c, double m, double y, double k)
{
    length = 4;

    values[0] = c;
    values[1] = m;
    values[2] = y;
    values[3] = k;
}

// If <adjust> is +1, color is brightened;
// if <adjust> is -1, color is darkened;
// otherwise color is not modified.
AnnotColor::AnnotColor(const Array &array, int adjust)
{
    int i;

    length = array.getLength();
    if (length > 4) {
        length = 4;
    }

    for (i = 0; i < length; i++) {
        Object obj1 = array.get(i);
        if (obj1.isNum()) {
            values[i] = obj1.getNum();

            if (values[i] < 0 || values[i] > 1) {
                values[i] = 0;
            }
        } else {
            values[i] = 0;
        }
    }

    if (adjust != 0) {
        adjustColor(adjust);
    }
}

void AnnotColor::adjustColor(int adjust)
{
    int i;

    if (length == 4) {
        adjust = -adjust;
    }
    if (adjust > 0) {
        for (i = 0; i < length; ++i) {
            values[i] = 0.5 * values[i] + 0.5;
        }
    } else if (adjust < 0) {
        for (i = 0; i < length; ++i) {
            values[i] = 0.5 * values[i];
        }
    }
}

Object AnnotColor::writeToObject(XRef *xref) const
{
    if (length == 0) {
        return Object::null(); // Transparent (no color)
    }
    auto a = std::make_unique<Array>(xref);
    for (int i = 0; i < length; ++i) {
        a->add(Object(values[i]));
    }
    return Object(std::move(a));
}

//------------------------------------------------------------------------
// DefaultAppearance
//------------------------------------------------------------------------

DefaultAppearance::DefaultAppearance(std::string fontNameA, double fontPtSizeA, std::unique_ptr<AnnotColor> &&fontColorA) : fontName(std::move(fontNameA)), fontPtSize(fontPtSizeA), fontColor(std::move(fontColorA)) { }

DefaultAppearance::DefaultAppearance(const std::string &da)
{
    fontPtSize = -1;

    std::vector<std::string> daToks;
    const std::optional<size_t> tfIndex = FormFieldText::tokenizeDA(da, &daToks, "Tf");

    if (tfIndex && tfIndex >= 1) {
        fontPtSize = gatof(daToks[*tfIndex - 1].c_str());
    }
    if (tfIndex && tfIndex >= 2) {
        // We are expecting a name, therefore the first letter should be '/'.
        const std::string &fontToken = daToks[*tfIndex - 2];
        if (fontToken.size() > 1 && fontToken[0] == '/') {
            // The +1 is here to skip the leading '/'.
            fontName = fontToken.substr(1);
        }
    }
    // Scan backwards: we are looking for the last set value
    size_t i = daToks.size();
    while (true) {
        if (i == 0) {
            break;
        }
        --i;

        if (!fontColor) {
            if (daToks[i] == "g" && i >= 1) {
                fontColor = std::make_unique<AnnotColor>(gatof(daToks[i - 1].c_str()));
            } else if (daToks[i] == "rg" && i >= 3) {
                fontColor = std::make_unique<AnnotColor>(gatof(daToks[i - 3].c_str()), gatof(daToks[i - 2].c_str()), gatof(daToks[i - 1].c_str()));
            } else if (daToks[i] == "k" && i >= 4) {
                fontColor = std::make_unique<AnnotColor>(gatof(daToks[i - 4].c_str()), gatof(daToks[i - 3].c_str()), gatof(daToks[i - 2].c_str()), gatof(daToks[i - 1].c_str()));
            }
        }
    }
}

void DefaultAppearance::setFontName(const std::string &fontNameA)
{
    fontName = fontNameA;
}

void DefaultAppearance::setFontPtSize(double fontPtSizeA)
{
    fontPtSize = fontPtSizeA;
}

void DefaultAppearance::setFontColor(std::unique_ptr<AnnotColor> fontColorA)
{
    fontColor = std::move(fontColorA);
}

std::string DefaultAppearance::toAppearanceString() const
{
    AnnotAppearanceBuilder appearBuilder;
    if (fontColor) {
        appearBuilder.setDrawColor(*fontColor, true);
    }
    appearBuilder.setTextFont(fontName, fontPtSize);
    return appearBuilder.buffer();
}

//------------------------------------------------------------------------
// AnnotIconFit
//------------------------------------------------------------------------

AnnotIconFit::AnnotIconFit(Dict *dict)
{
    Object obj1;

    obj1 = dict->lookup("SW");
    if (obj1.isName()) {
        const std::string &scaleName = obj1.getNameString();

        if (scaleName == "B") {
            scaleWhen = scaleBigger;
        } else if (scaleName == "S") {
            scaleWhen = scaleSmaller;
        } else if (scaleName == "N") {
            scaleWhen = scaleNever;
        } else {
            scaleWhen = scaleAlways;
        }
    } else {
        scaleWhen = scaleAlways;
    }

    obj1 = dict->lookup("S");
    if (obj1.isName()) {
        const std::string &scaleName = obj1.getNameString();

        if (scaleName == "A") {
            scale = scaleAnamorphic;
        } else {
            scale = scaleProportional;
        }
    } else {
        scale = scaleProportional;
    }

    obj1 = dict->lookup("A");
    if (obj1.isArrayOfLength(2)) {
        left = obj1.arrayGet(0).getNumWithDefaultValue(0);
        bottom = obj1.arrayGet(1).getNumWithDefaultValue(0);

        if (left < 0 || left > 1) {
            left = 0.5;
        }

        if (bottom < 0 || bottom > 1) {
            bottom = 0.5;
        }

    } else {
        left = bottom = 0.5;
    }

    fullyBounds = dict->lookup("FB").getBoolWithDefaultValue(false);
}

//------------------------------------------------------------------------
// AnnotAppearance
//------------------------------------------------------------------------

AnnotAppearance::AnnotAppearance(PDFDoc *docA, Object *dict)
{
    assert(dict->isDict());
    doc = docA;
    appearDict = dict->copy();
}

AnnotAppearance::~AnnotAppearance() = default;

Object AnnotAppearance::getAppearanceStream(AnnotAppearanceType type, std::string_view state) const
{
    Object apData;

    // Obtain dictionary or stream associated to appearance type
    switch (type) {
    case appearRollover:
        apData = appearDict.dictLookupNF("R").copy();
        if (apData.isNull()) {
            apData = appearDict.dictLookupNF("N").copy();
        }
        break;
    case appearDown:
        apData = appearDict.dictLookupNF("D").copy();
        if (apData.isNull()) {
            apData = appearDict.dictLookupNF("N").copy();
        }
        break;
    case appearNormal:
        apData = appearDict.dictLookupNF("N").copy();
        break;
    }

    if (apData.isDict()) {
        return apData.dictLookupNF(state).copy();
    }
    if (apData.isRef()) {
        // Ref can point to 1)Stream or 2)dictionary with named streams - Issue #1558
        Object obj = apData.fetch(doc->getXRef());
        if (obj.isDict()) {
            return obj.dictLookupNF(state).copy();
        }
        return apData;
    }

    return Object();
}

std::optional<std::string> AnnotAppearance::getStateKey(int i) const
{
    const Object &obj1 = appearDict.dictLookupNF("N");
    if (obj1.isDict()) {
        return obj1.getDict()->getKey(i);
    }
    return std::nullopt;
}

int AnnotAppearance::getNumStates() const
{
    int res = 0;
    const Object &obj1 = appearDict.dictLookupNF("N");
    if (obj1.isDict()) {
        res = obj1.dictGetLength();
    }
    return res;
}

// Test if stateObj (a Ref or a Dict) points to the specified stream
bool AnnotAppearance::referencesStream(const Object &stateObj, Ref refToStream)
{
    if (stateObj.isRef()) {
        const Ref r = stateObj.getRef();
        if (r == refToStream) {
            return true;
        }
    } else if (stateObj.isDict()) { // Test each value
        const Dict *stateDict = stateObj.getDict();
        const int size = stateDict->getLength();
        for (int i = 0; i < size; ++i) {
            const Object &obj1 = stateDict->getValNF(i);
            if (obj1.isRef()) {
                const Ref r = obj1.getRef();
                if (r == refToStream) {
                    return true;
                }
            }
        }
    }
    return false; // Not found
}

// Test if this AnnotAppearance references the specified stream
bool AnnotAppearance::referencesStream(Ref refToStream)
{
    bool found;

    // Scan each state's ref/subdictionary
    const Object &objN = appearDict.dictLookupNF("N");
    found = referencesStream(objN, refToStream);
    if (found) {
        return true;
    }

    const Object &objR = appearDict.dictLookupNF("R");
    found = referencesStream(objR, refToStream);
    if (found) {
        return true;
    }

    const Object &objD = appearDict.dictLookupNF("D");
    found = referencesStream(objD, refToStream);
    return found;
}

// If this is the only annotation in the document that references the
// specified appearance stream, remove the appearance stream
void AnnotAppearance::removeStream(Ref refToStream)
{
    const int lastpage = doc->getNumPages();
    for (int pg = 1; pg <= lastpage; ++pg) { // Scan all annotations in the document
        Page *page = doc->getPage(pg);
        if (!page) {
            error(errSyntaxError, -1, "Failed check for shared annotation stream at page {0:d}", pg);
            continue;
        }
        Annots *annots = page->getAnnots();
        for (const std::shared_ptr<Annot> &annot : annots->getAnnots()) {
            AnnotAppearance *annotAp = annot->getAppearStreams();
            if (annotAp && annotAp != this && annotAp->referencesStream(refToStream)) {
                return; // Another annotation points to the stream -> Don't delete it
            }
        }
    }

    // TODO: stream resources (e.g. font), AP name tree
    doc->getXRef()->removeIndirectObject(refToStream);
}

// Removes stream if obj is a Ref, or removes pointed streams if obj is a Dict
void AnnotAppearance::removeStateStreams(const Object &state)
{
    if (state.isRef()) {
        removeStream(state.getRef());
    } else if (state.isDict()) {
        const Dict *stateDict = state.getDict();
        const int size = stateDict->getLength();
        for (int i = 0; i < size; ++i) {
            const Object &obj2 = stateDict->getValNF(i);
            if (obj2.isRef()) {
                removeStream(obj2.getRef());
            }
        }
    }
}

void AnnotAppearance::removeAllStreams()
{
    const Object &objN = appearDict.dictLookupNF("N");
    removeStateStreams(objN);
    const Object &objR = appearDict.dictLookupNF("R");
    removeStateStreams(objR);
    const Object &objD = appearDict.dictLookupNF("D");
    removeStateStreams(objD);
}

//------------------------------------------------------------------------
// AnnotAppearanceCharacs
//------------------------------------------------------------------------

AnnotAppearanceCharacs::AnnotAppearanceCharacs(Dict *dict)
{
    Object obj1;

    if (!dict) {
        rotation = 0;
        position = captionNoIcon;
        return;
    }

    obj1 = dict->lookup("R");
    if (obj1.isInt()) {
        rotation = obj1.getInt();
    } else {
        rotation = 0;
    }

    obj1 = dict->lookup("BC");
    if (obj1.isArray()) {
        Array *colorComponents = obj1.getArray();
        if (colorComponents->getLength() > 0) {
            borderColor = std::make_unique<AnnotColor>(*colorComponents);
        }
    }

    obj1 = dict->lookup("BG");
    if (obj1.isArray()) {
        Array *colorComponents = obj1.getArray();
        if (colorComponents->getLength() > 0) {
            backColor = std::make_unique<AnnotColor>(*colorComponents);
        }
    }

    obj1 = dict->lookup("CA");
    if (obj1.isString()) {
        normalCaption = obj1.takeString();
    }

    obj1 = dict->lookup("RC");
    if (obj1.isString()) {
        rolloverCaption = obj1.takeString();
    }

    obj1 = dict->lookup("AC");
    if (obj1.isString()) {
        alternateCaption = obj1.takeString();
    }

    obj1 = dict->lookup("IF");
    if (obj1.isDict()) {
        iconFit = std::make_unique<AnnotIconFit>(obj1.getDict());
    }

    obj1 = dict->lookup("TP");
    if (obj1.isInt()) {
        position = static_cast<AnnotAppearanceCharacsTextPos>(obj1.getInt());
    } else {
        position = captionNoIcon;
    }
}

AnnotAppearanceCharacs::~AnnotAppearanceCharacs() = default;

std::unique_ptr<AnnotAppearanceCharacs> AnnotAppearanceCharacs::copy() const
{
    auto *res = new AnnotAppearanceCharacs(nullptr);
    res->rotation = rotation;
    if (borderColor) {
        res->borderColor = std::make_unique<AnnotColor>(*borderColor);
    }
    if (backColor) {
        res->backColor = std::make_unique<AnnotColor>(*backColor);
    }
    if (normalCaption) {
        res->normalCaption = normalCaption->copy();
    }
    if (rolloverCaption) {
        res->rolloverCaption = rolloverCaption->copy();
    }
    if (alternateCaption) {
        res->alternateCaption = alternateCaption->copy();
    }
    if (iconFit) {
        res->iconFit = std::make_unique<AnnotIconFit>(*iconFit);
    }
    res->position = position;
    return std::unique_ptr<AnnotAppearanceCharacs>(res);
}

//------------------------------------------------------------------------
// AnnotAppearanceBBox
//------------------------------------------------------------------------

AnnotAppearanceBBox::AnnotAppearanceBBox(const PDFRectangle &rect)
{
    origX = rect.x1;
    origY = rect.y1;
    borderWidth = 0;

    // Initially set the same size as rect
    minX = 0;
    minY = 0;
    maxX = rect.x2 - rect.x1;
    maxY = rect.y2 - rect.y1;
}

void AnnotAppearanceBBox::extendTo(double x, double y)
{
    if (x < minX) {
        minX = x;
    } else if (x > maxX) {
        maxX = x;
    }
    if (y < minY) {
        minY = y;
    } else if (y > maxY) {
        maxY = y;
    }
}

std::array<double, 4> AnnotAppearanceBBox::getBBoxRect() const
{
    return { minX - borderWidth, minY - borderWidth, maxX + borderWidth, maxY + borderWidth };
}

double AnnotAppearanceBBox::getPageXMin() const
{
    return origX + minX - borderWidth;
}

double AnnotAppearanceBBox::getPageYMin() const
{
    return origY + minY - borderWidth;
}

double AnnotAppearanceBBox::getPageXMax() const
{
    return origX + maxX + borderWidth;
}

double AnnotAppearanceBBox::getPageYMax() const
{
    return origY + maxY + borderWidth;
}

//------------------------------------------------------------------------
// Annot
//------------------------------------------------------------------------

#define annotLocker() const std::scoped_lock locker(mutex)

Annot::Annot(PDFDoc *docA, const PDFRectangle &rectA)
{

    flags = flagUnknown;
    type = typeUnknown;

    auto a = std::make_unique<Array>(docA->getXRef());
    a->add(Object(rectA.x1));
    a->add(Object(rectA.y1));
    a->add(Object(rectA.x2));
    a->add(Object(rectA.y2));

    annotObj = Object(std::make_unique<Dict>(docA->getXRef()));
    annotObj.dictSet("Type", Object::name("Annot"));
    annotObj.dictSet("Rect", Object(std::move(a)));

    ref = docA->getXRef()->addIndirectObject(annotObj);

    initialize(docA, annotObj.getDict());
}

Annot::Annot(PDFDoc *docA, Object &&dictObject)
{
    hasRef = false;
    flags = flagUnknown;
    type = typeUnknown;
    annotObj = std::move(dictObject);
    initialize(docA, annotObj.getDict());
}

Annot::Annot(PDFDoc *docA, Object &&dictObject, const Object &obj)
{
    if (obj.isRef()) {
        hasRef = true;
        ref = obj.getRef();
    } else {
        hasRef = false;
    }
    flags = flagUnknown;
    type = typeUnknown;
    annotObj = std::move(dictObject);
    initialize(docA, annotObj.getDict());
}

void Annot::initialize(PDFDoc *docA, Dict *dict)
{
    Object apObj, asObj, obj1;

    ok = true;
    doc = docA;

    appearance.setToNull();

    //----- parse the rectangle
    rect = std::make_unique<PDFRectangle>();
    obj1 = dict->lookup("Rect");
    if (obj1.isArrayOfLength(4)) {
        rect->x1 = obj1.arrayGet(0).getNumWithDefaultValue(0);
        rect->y1 = obj1.arrayGet(1).getNumWithDefaultValue(0);
        rect->x2 = obj1.arrayGet(2).getNumWithDefaultValue(1);
        rect->y2 = obj1.arrayGet(3).getNumWithDefaultValue(1);

        if (rect->x1 > rect->x2) {
            double t = rect->x1;
            rect->x1 = rect->x2;
            rect->x2 = t;
        }

        if (rect->y1 > rect->y2) {
            double t = rect->y1;
            rect->y1 = rect->y2;
            rect->y2 = t;
        }
    } else {
        rect->x1 = rect->y1 = 0;
        rect->x2 = rect->y2 = 1;
        error(errSyntaxError, -1, "Bad bounding box for annotation");
        ok = false;
    }

    obj1 = dict->lookup("Contents");
    if (obj1.isString()) {
        contents = GooString(obj1.getString());
    } else {
        contents.clear();
    }

    // Note: This value is overwritten by Annots ctor
    const Object &pObj = dict->lookupNF("P");
    if (pObj.isRef()) {
        const Ref pRef = pObj.getRef();

        page = doc->getCatalog()->findPage(pRef);
    } else {
        page = 0;
    }

    obj1 = dict->lookup("NM");
    if (obj1.isString()) {
        name = obj1.takeString();
    }

    obj1 = dict->lookup("M");
    if (obj1.isString()) {
        modified = obj1.takeString();
    }

    //----- get the flags
    obj1 = dict->lookup("F");
    if (obj1.isInt()) {
        flags |= obj1.getInt();
    } else {
        flags = flagUnknown;
    }

    //----- get the annotation appearance dictionary
    apObj = dict->lookup("AP");
    if (apObj.isDict()) {
        appearStreams = std::make_unique<AnnotAppearance>(doc, &apObj);
    }

    //----- get the appearance state
    asObj = dict->lookup("AS");
    if (asObj.isName()) {
        appearState = asObj.getNameString();
    } else if (appearStreams && appearStreams->getNumStates() != 0) {
        error(errSyntaxError, -1, "Invalid or missing AS value in annotation containing one or more appearance subdictionaries");
        // AS value is required in this case, but if the
        // N dictionary contains only one entry
        // take it as default appearance.
        if (appearStreams->getNumStates() == 1) {
            appearState = appearStreams->getStateKey(0);
        }
    }
    if (!appearState) {
        appearState = "Off";
    }

    //----- get the annotation appearance
    if (appearStreams) {
        appearance = appearStreams->getAppearanceStream(AnnotAppearance::appearNormal, appearState.value());
        Object obj = appearance.fetch(doc->getXRef());
        if (obj.isStream() && !obj.getStream()->rewind()) {
            // appearance stream is invalid as reset() returned false - Issue #1557
            appearance.setToNull();
        }
    }

    //----- parse the border style
    // According to the spec if neither the Border nor the BS entry is present,
    // the border shall be drawn as a solid line with a width of 1 point. But acroread
    // seems to ignore the Border entry for annots that can't have a BS entry. So, we only
    // follow this rule for annots tha can have a BS entry.
    obj1 = dict->lookup("Border");
    if (obj1.isArray()) {
        border = std::make_unique<AnnotBorderArray>(*obj1.getArray());
    }

    obj1 = dict->lookup("C");
    if (obj1.isArray()) {
        color = std::make_unique<AnnotColor>(*obj1.getArray());
    }

    obj1 = dict->lookup("StructParent");
    if (obj1.isInt()) {
        treeKey = obj1.getInt();
    } else {
        treeKey = 0;
    }

    oc = dict->lookupNF("OC").copy();
}

void Annot::getRect(double *x1, double *y1, double *x2, double *y2) const
{
    *x1 = rect->x1;
    *y1 = rect->y1;
    *x2 = rect->x2;
    *y2 = rect->y2;
}

void Annot::setRect(const PDFRectangle &rectA)
{
    setRect(rectA.x1, rectA.y1, rectA.x2, rectA.y2);
}

void Annot::setRect(double x1, double y1, double x2, double y2)
{
    if (x1 < x2) {
        rect->x1 = x1;
        rect->x2 = x2;
    } else {
        rect->x1 = x2;
        rect->x2 = x1;
    }

    if (y1 < y2) {
        rect->y1 = y1;
        rect->y2 = y2;
    } else {
        rect->y1 = y2;
        rect->y2 = y1;
    }

    auto a = std::make_unique<Array>(doc->getXRef());
    a->add(Object(rect->x1));
    a->add(Object(rect->y1));
    a->add(Object(rect->x2));
    a->add(Object(rect->y2));

    update("Rect", Object(std::move(a)));
    invalidateAppearance();
}

bool Annot::inRect(double x, double y) const
{
    return rect->contains(x, y);
}

void Annot::update(const char *key, Object &&value)
{
    annotLocker();
    /* Set M to current time, unless we are updating M itself */
    if (strcmp(key, "M") != 0) {
        modified = timeToDateString(nullptr);

        annotObj.dictSet("M", Object(std::string { modified->toStr() }));
    }

    annotObj.dictSet(key, std::move(value));

    doc->getXRef()->setModifiedObject(&annotObj, ref);

    hasBeenUpdated = true;
}

void Annot::setContents(std::unique_ptr<GooString> &&new_content)
{
    annotLocker();

    if (new_content) {
        contents = GooString(new_content->toStr());
        // append the unicode marker <FE FF> if needed
        if (!hasUnicodeByteOrderMark(contents.toStr())) {
            prependUnicodeByteOrderMark(contents.toNonConstStr());
        }
    } else {
        contents.clear();
    }

    update("Contents", Object(std::string { contents.toStr() }));
}

void Annot::setName(GooString *new_name)
{
    annotLocker();

    if (new_name) {
        name = new_name->copy();
    } else {
        name = std::make_unique<GooString>();
    }

    update("NM", Object(std::string { name->toStr() }));
}

void Annot::setModified(std::unique_ptr<GooString> new_modified)
{
    annotLocker();

    if (new_modified) {
        modified = std::move(new_modified);
        update("M", Object(std::string { modified->toStr() }));
    } else {
        modified.reset(nullptr);
        update("M", Object::null());
    }
}

void Annot::setFlags(unsigned int new_flags)
{
    annotLocker();
    flags = new_flags;
    update("F", Object(static_cast<int>(flags)));
}

void Annot::setBorder(std::unique_ptr<AnnotBorder> &&new_border)
{
    annotLocker();

    if (new_border) {
        Object obj1 = new_border->writeToObject(doc->getXRef());
        update(new_border->getType() == AnnotBorder::typeArray ? "Border" : "BS", std::move(obj1));
        border = std::move(new_border);
    } else {
        border = nullptr;
    }
    invalidateAppearance();
}

void Annot::setColor(std::unique_ptr<AnnotColor> &&new_color)
{
    annotLocker();

    if (new_color) {
        Object obj1 = new_color->writeToObject(doc->getXRef());
        update("C", std::move(obj1));
        color = std::move(new_color);
    } else {
        color = nullptr;
    }
    invalidateAppearance();
}

void Annot::setPage(int pageIndex, bool updateP)
{
    annotLocker();
    Page *pageobj = doc->getPage(pageIndex);
    Object obj1 = Object::null();

    if (pageobj) {
        const Ref pageRef = pageobj->getRef();
        obj1 = Object(pageRef);
        page = pageIndex;
    } else {
        page = 0;
    }

    if (updateP) {
        update("P", std::move(obj1));
    }
}

void Annot::setAppearanceState(const char *state)
{
    annotLocker();
    if (!state) {
        return;
    }

    appearState = state;
    appearBBox = nullptr;

    update("AS", Object::name(state));

    // The appearance state determines the current appearance stream
    if (appearStreams) {
        assert(appearState.has_value());
        appearance = appearStreams->getAppearanceStream(AnnotAppearance::appearNormal, appearState.value());
    } else {
        appearance.setToNull();
    }
}

void Annot::invalidateAppearance()
{
    annotLocker();
    updatedAppearanceStream = Ref::INVALID();
    if (appearStreams) { // Remove existing appearance streams
        appearStreams->removeAllStreams();
    }
    appearStreams = nullptr;
    appearState = std::nullopt;
    appearBBox = nullptr;
    appearance.setToNull();

    Object obj2 = annotObj.dictLookup("AP");
    if (!obj2.isNull()) {
        update("AP", Object::null()); // Remove AP
    }

    obj2 = annotObj.dictLookup("AS");
    if (!obj2.isNull()) {
        update("AS", Object::null()); // Remove AS
    }
}

double Annot::getXMin() const
{
    return rect->x1;
}

double Annot::getYMin() const
{
    return rect->y1;
}

double Annot::getXMax() const
{
    return rect->x2;
}

double Annot::getYMax() const
{
    return rect->y2;
}

void Annot::readArrayNum(const Object &pdfArray, int key, double *value)
{
    Object valueObject = pdfArray.arrayGet(key);
    if (valueObject.isNum()) {
        *value = valueObject.getNum();
    } else {
        *value = 0;
        ok = false;
    }
}

void Annot::removeReferencedObjects()
{
    // Remove appearance streams (if any)
    invalidateAppearance();
}

Annot::~Annot() = default;

void AnnotAppearanceBuilder::setDrawColor(const AnnotColor &drawColor, bool fill)
{
    const std::array<double, 4> &values = drawColor.getValues();

    switch (drawColor.getSpace()) {
    case AnnotColor::colorCMYK:
        GooString::appendf(appearBuf, "{0:.5f} {1:.5f} {2:.5f} {3:.5f} {4:c}\n", values[0], values[1], values[2], values[3], fill ? 'k' : 'K');
        break;
    case AnnotColor::colorRGB:
        GooString::appendf(appearBuf, "{0:.5f} {1:.5f} {2:.5f} {3:s}\n", values[0], values[1], values[2], fill ? "rg" : "RG");
        break;
    case AnnotColor::colorGray:
        GooString::appendf(appearBuf, "{0:.5f} {1:c}\n", values[0], fill ? 'g' : 'G');
        break;
    case AnnotColor::colorTransparent:
    default:
        break;
    }
}

void AnnotAppearanceBuilder::setTextFont(const std::string &fontName, double fontSize)
{
    if (!fontName.empty()) {
        GooString::appendf(appearBuf, "/{0:s} {1:.2f} Tf\n", fontName.c_str(), fontSize);
    }
}

void AnnotAppearanceBuilder::setLineStyleForBorder(const AnnotBorder &border)
{
    switch (border.getStyle()) {
    case AnnotBorder::borderDashed:
        appearBuf.append("[");
        for (double dash : border.getDash()) {
            GooString::appendf(appearBuf, " {0:.2f}", dash);
        }
        appearBuf.append(" ] 0 d\n");
        break;
    default:
        appearBuf.append("[] 0 d\n");
        break;
    }
    GooString::appendf(appearBuf, "{0:.2f} w\n", border.getWidth());
}

// Draw an (approximate) circle of radius <r> centered at (<cx>, <cy>).
// If <fill> is true, the circle is filled; otherwise it is stroked.
void AnnotAppearanceBuilder::drawCircle(double cx, double cy, double r, bool fill)
{
    if (fill) {
        drawEllipse(cx, cy, r, r, true, false);
    } else {
        drawEllipse(cx, cy, r, r, false, true);
    }
}

// Draw an (approximate) ellipse of radius <rx> on x-axis and <ry> on y-axis, centered at (<cx>, <cy>).
// If <fill> is true, the ellipse is filled with current color for non-stroking operations.
// If <stroke> is true, the ellipse path ist stroked with current color and color space for stroking operations.
// Path will be closed if either fill or stroke is true; otherwise it's left open.
void AnnotAppearanceBuilder::drawEllipse(double cx, double cy, double rx, double ry, bool fill, bool stroke)
{
    GooString::appendf(appearBuf, "{0:.2f} {1:.2f} m\n", cx + rx, cy);
    GooString::appendf(appearBuf, "{0:.2f} {1:.2f} {2:.2f} {3:.2f} {4:.2f} {5:.2f} c\n", cx + rx, cy + bezierCircle * ry, cx + bezierCircle * rx, cy + ry, cx, cy + ry);
    GooString::appendf(appearBuf, "{0:.2f} {1:.2f} {2:.2f} {3:.2f} {4:.2f} {5:.2f} c\n", cx - bezierCircle * rx, cy + ry, cx - rx, cy + bezierCircle * ry, cx - rx, cy);
    GooString::appendf(appearBuf, "{0:.2f} {1:.2f} {2:.2f} {3:.2f} {4:.2f} {5:.2f} c\n", cx - rx, cy - bezierCircle * ry, cx - bezierCircle * rx, cy - ry, cx, cy - ry);
    GooString::appendf(appearBuf, "{0:.2f} {1:.2f} {2:.2f} {3:.2f} {4:.2f} {5:.2f} c\n", cx + bezierCircle * rx, cy - ry, cx + rx, cy - bezierCircle * ry, cx + rx, cy);
    if (!fill && stroke) {
        appearBuf.append("s\n");
    } else if (fill && !stroke) {
        appearBuf.append("f\n");
    } else if (fill && stroke) {
        appearBuf.append("b\n");
    }
}

// Draw the top-left half of an (approximate) circle of radius <r>
// centered at (<cx>, <cy>).
void AnnotAppearanceBuilder::drawCircleTopLeft(double cx, double cy, double r)
{
    double r2;

    r2 = r / std::numbers::sqrt2;
    GooString::appendf(appearBuf, "{0:.2f} {1:.2f} m\n", cx + r2, cy + r2);
    GooString::appendf(appearBuf, "{0:.2f} {1:.2f} {2:.2f} {3:.2f} {4:.2f} {5:.2f} c\n", cx + (1 - bezierCircle) * r2, cy + (1 + bezierCircle) * r2, cx - (1 - bezierCircle) * r2, cy + (1 + bezierCircle) * r2, cx - r2, cy + r2);
    GooString::appendf(appearBuf, "{0:.2f} {1:.2f} {2:.2f} {3:.2f} {4:.2f} {5:.2f} c\n", cx - (1 + bezierCircle) * r2, cy + (1 - bezierCircle) * r2, cx - (1 + bezierCircle) * r2, cy - (1 - bezierCircle) * r2, cx - r2, cy - r2);
    appearBuf.append("S\n");
}

// Draw the bottom-right half of an (approximate) circle of radius <r>
// centered at (<cx>, <cy>).
void AnnotAppearanceBuilder::drawCircleBottomRight(double cx, double cy, double r)
{
    double r2;

    r2 = r / std::numbers::sqrt2;
    GooString::appendf(appearBuf, "{0:.2f} {1:.2f} m\n", cx - r2, cy - r2);
    GooString::appendf(appearBuf, "{0:.2f} {1:.2f} {2:.2f} {3:.2f} {4:.2f} {5:.2f} c\n", cx - (1 - bezierCircle) * r2, cy - (1 + bezierCircle) * r2, cx + (1 - bezierCircle) * r2, cy - (1 + bezierCircle) * r2, cx + r2, cy - r2);
    GooString::appendf(appearBuf, "{0:.2f} {1:.2f} {2:.2f} {3:.2f} {4:.2f} {5:.2f} c\n", cx + (1 + bezierCircle) * r2, cy - (1 - bezierCircle) * r2, cx + (1 + bezierCircle) * r2, cy + (1 - bezierCircle) * r2, cx + r2, cy + r2);
    appearBuf.append("S\n");
}

void AnnotAppearanceBuilder::drawLineEndSquare(double x, double y, double size, bool fill, const Matrix &m)
{
    const double halfSize { size / 2. };
    const double x1[3] { x - size, x - size, x };
    const double y1[3] { y + halfSize, y - halfSize, y - halfSize };
    double tx, ty;

    m.transform(x, y + halfSize, &tx, &ty);
    appendf("{0:.2f} {1:.2f} m\n", tx, ty);
    for (int i = 0; i < 3; i++) {
        m.transform(x1[i], y1[i], &tx, &ty);
        appendf("{0:.2f} {1:.2f} l\n", tx, ty);
    }
    appearBuf.append(fill ? "b\n" : "s\n");
}

void AnnotAppearanceBuilder::drawLineEndCircle(double x, double y, double size, bool fill, const Matrix &m)
{
    const double halfSize { size / 2. };
    const double x1[4] { x, x - halfSize - bezierCircle * halfSize, x - size, x - halfSize + bezierCircle * halfSize };
    const double x2[4] { x - halfSize + bezierCircle * halfSize, x - size, x - halfSize - bezierCircle * halfSize, x };
    const double x3[4] { x - halfSize, x - size, x - halfSize, x };
    const double y1[4] { y + bezierCircle * halfSize, y + halfSize, y - bezierCircle * halfSize, y - halfSize };
    const double y2[4] { y + halfSize, y + bezierCircle * halfSize, y - halfSize, y - bezierCircle * halfSize };
    const double y3[4] { y + halfSize, y, y - halfSize, y };
    double tx[3];
    double ty[3];

    m.transform(x, y, &tx[0], &ty[0]);
    GooString::appendf(appearBuf, "{0:.2f} {1:.2f} m\n", tx[0], ty[0]);
    for (int i = 0; i < 4; i++) {
        m.transform(x1[i], y1[i], &tx[0], &ty[0]);
        m.transform(x2[i], y2[i], &tx[1], &ty[1]);
        m.transform(x3[i], y3[i], &tx[2], &ty[2]);
        GooString::appendf(appearBuf, "{0:.2f} {1:.2f} {2:.2f} {3:.2f} {4:.2f} {5:.2f} c\n", tx[0], ty[0], tx[1], ty[1], tx[2], ty[2]);
    }
    appearBuf.append(fill ? "b\n" : "s\n");
}

void AnnotAppearanceBuilder::drawLineEndDiamond(double x, double y, double size, bool fill, const Matrix &m)
{
    const double halfSize { size / 2. };
    const double x1[3] { x - halfSize, x - size, x - halfSize };
    const double y1[3] { y + halfSize, y, y - halfSize };
    double tx, ty;

    m.transform(x, y, &tx, &ty);
    appendf("{0:.2f} {1:.2f} m\n", tx, ty);
    for (int i = 0; i < 3; i++) {
        m.transform(x1[i], y1[i], &tx, &ty);
        appendf("{0:.2f} {1:.2f} l\n", tx, ty);
    }
    appearBuf.append(fill ? "b\n" : "s\n");
}

void AnnotAppearanceBuilder::drawLineEndArrow(double x, double y, double size, int orientation, bool isOpen, bool fill, const Matrix &m)
{
    const double alpha { std::numbers::pi / 6. };
    const double xOffs { orientation * size };
    const double yOffs { tan(alpha) * size };
    double tx, ty;

    m.transform(x - xOffs, y + yOffs, &tx, &ty);
    appendf("{0:.2f} {1:.2f} m\n", tx, ty);
    m.transform(x, y, &tx, &ty);
    appendf("{0:.2f} {1:.2f} l\n", tx, ty);
    m.transform(x - xOffs, y - yOffs, &tx, &ty);
    appendf("{0:.2f} {1:.2f} l\n", tx, ty);

    if (isOpen) {
        appearBuf.append("S\n");
    } else {
        appearBuf.append(fill ? "b\n" : "s\n");
    }
}

void AnnotAppearanceBuilder::drawLineEndSlash(double x, double y, double size, const Matrix &m)
{
    const double halfSize { size / 2. };
    const double xOffs { cos(std::numbers::pi / 3.) * halfSize };
    double tx, ty;

    m.transform(x - xOffs, y - halfSize, &tx, &ty);
    appendf("{0:.2f} {1:.2f} m\n", tx, ty);
    m.transform(x + xOffs, y + halfSize, &tx, &ty);
    appendf("{0:.2f} {1:.2f} l\n", tx, ty);
    appearBuf.append("S\n");
}

void AnnotAppearanceBuilder::drawLineEnding(AnnotLineEndingStyle endingStyle, double x, double y, double size, bool fill, const Matrix &m)
{
    switch (endingStyle) {
    case annotLineEndingSquare:
        drawLineEndSquare(x, y, size, fill, m);
        break;
    case annotLineEndingCircle:
        drawLineEndCircle(x, y, size, fill, m);
        break;
    case annotLineEndingDiamond:
        drawLineEndDiamond(x, y, size, fill, m);
        break;
    case annotLineEndingOpenArrow:
        drawLineEndArrow(x, y, size, 1, true, fill, m);
        break;
    case annotLineEndingClosedArrow:
        drawLineEndArrow(x, y, size, 1, false, fill, m);
        break;
    case annotLineEndingButt: {
        const double halfSize { size / 2. };
        double tx, ty;
        m.transform(x, y + halfSize, &tx, &ty);
        appendf("{0:.2f} {1:.2f} m\n", tx, ty);
        m.transform(x, y - halfSize, &tx, &ty);
        appendf("{0:.2f} {1:.2f} l S\n", tx, ty);
    } break;
    case annotLineEndingROpenArrow:
        drawLineEndArrow(x, y, size, -1, true, fill, m);
        break;
    case annotLineEndingRClosedArrow:
        drawLineEndArrow(x, y, size, -1, false, fill, m);
        break;
    case annotLineEndingSlash:
        drawLineEndSlash(x, y, size, m);
        break;
    default:
        break;
    }
}

double AnnotAppearanceBuilder::lineEndingXShorten(AnnotLineEndingStyle endingStyle, double size)
{
    switch (endingStyle) {
    case annotLineEndingCircle:
    case annotLineEndingClosedArrow:
    case annotLineEndingDiamond:
    case annotLineEndingSquare:
        return size;
    default:
        break;
    }
    return 0;
}

double AnnotAppearanceBuilder::lineEndingXExtendBBox(AnnotLineEndingStyle endingStyle, double size)
{
    switch (endingStyle) {
    case annotLineEndingRClosedArrow:
    case annotLineEndingROpenArrow:
        return size;
    case annotLineEndingSlash:
        return cos(std::numbers::pi / 3.) * size / 2.;
    default:
        break;
    }
    return 0;
}

Object Annot::createForm(const std::string &appearBuf, const std::array<double, 4> &bbox, bool transparencyGroup, std::unique_ptr<Dict> resDict)
{
    return createForm(appearBuf, bbox, transparencyGroup, resDict ? Object(std::move(resDict)) : Object());
}

Object Annot::createForm(const std::string &appearBuf, const std::array<double, 4> &bbox, bool transparencyGroup, Object &&resDictObject)
{
    auto appearDict = std::make_unique<Dict>(doc->getXRef());
    appearDict->set("Length", Object(static_cast<int>(appearBuf.size())));
    appearDict->set("Subtype", Object::name("Form"));

    auto a = std::make_unique<Array>(doc->getXRef());
    a->add(Object(bbox[0]));
    a->add(Object(bbox[1]));
    a->add(Object(bbox[2]));
    a->add(Object(bbox[3]));
    appearDict->set("BBox", Object(std::move(a)));
    if (transparencyGroup) {
        auto d = std::make_unique<Dict>(doc->getXRef());
        d->set("S", Object::name("Transparency"));
        appearDict->set("Group", Object(std::move(d)));
    }
    if (resDictObject.isDict()) {
        appearDict->set("Resources", std::move(resDictObject));
    }

    std::vector<char> data { appearBuf.c_str(), appearBuf.c_str() + appearBuf.size() };
    auto mStream = std::make_unique<AutoFreeMemStream>(std::move(data), Object(std::move(appearDict)));
    return Object(std::move(mStream));
}

std::unique_ptr<Dict> Annot::createResourcesDict(const char *formName, Object &&formStream, const char *stateName, double opacity, const char *blendMode)
{
    auto gsDict = std::make_unique<Dict>(doc->getXRef());
    if (opacity != 1) {
        gsDict->set("CA", Object(opacity));
        gsDict->set("ca", Object(opacity));
    }
    if (blendMode) {
        gsDict->set("BM", Object::name(blendMode));
    }
    auto stateDict = std::make_unique<Dict>(doc->getXRef());
    stateDict->set(stateName, Object(std::move(gsDict)));

    auto resDict = std::make_unique<Dict>(doc->getXRef());
    resDict->set("ExtGState", Object(std::move(stateDict)));
    if (formName) {
        auto formDict = std::make_unique<Dict>(doc->getXRef());
        formDict->set(formName, std::move(formStream));
        resDict->set("XObject", Object(std::move(formDict)));
    }

    return resDict;
}

Object Annot::getAppearanceResDict()
{
    Object obj1, obj2;

    // Fetch appearance's resource dict (if any)
    obj1 = appearance.fetch(doc->getXRef());
    if (obj1.isStream()) {
        obj2 = obj1.getStream()->getDict()->lookup("Resources");
        if (obj2.isDict()) {
            return obj2;
        }
    }

    return Object::null();
}

bool Annot::isVisible(bool printing) const
{
    // check the flags
    if ((flags & flagHidden) || (printing && !(flags & flagPrint)) || (!printing && (flags & flagNoView))) {
        return false;
    }

    // check the OC
    const OCGs *optContentConfig = doc->getCatalog()->getOptContentConfig();
    if (optContentConfig) {
        if (!optContentConfig->optContentIsVisible(&oc)) {
            return false;
        }
    }

    return true;
}

int Annot::getRotation() const
{
    Page *pageobj = doc->getPage(page);
    assert(pageobj != nullptr);

    if (flags & flagNoRotate) {
        return (360 - pageobj->getRotate()) % 360;
    }
    return 0;
}

void Annot::draw(Gfx *gfx, bool printing)
{
    annotLocker();
    if (!isVisible(printing)) {
        return;
    }

    // draw the appearance stream
    Object obj = appearance.fetch(gfx->getXRef());
    gfx->drawAnnot(&obj, nullptr, color.get(), rect->x1, rect->y1, rect->x2, rect->y2, getRotation());
}

void Annot::setNewAppearance(Object &&newAppearance)
{
    setNewAppearance(std::move(newAppearance), false);
}

void Annot::setNewAppearance(Object &&newAppearance, bool keepAppearState)
{
    if (newAppearance.isNull()) {
        return;
    }

    annotLocker();
    if (newAppearance.getType() == ObjType::objStream) {
        Object oldAS = annotObj.dictLookup("AS");
        invalidateAppearance();
        appearance = std::move(newAppearance);

        updatedAppearanceStream = doc->getXRef()->addIndirectObject(appearance);

        Object obj1 = Object(std::make_unique<Dict>(doc->getXRef()));
        obj1.dictAdd("N", Object(updatedAppearanceStream));
        update("AP", std::move(obj1));
        Object updatedAP = annotObj.dictLookup("AP");
        appearStreams = std::make_unique<AnnotAppearance>(doc, &updatedAP);

        if (keepAppearState && !oldAS.isNull()) {
            appearState = oldAS.getNameString();
            update("AS", std::move(oldAS));
        } else {
            update("AS", Object::name("N"));
        }
    } else {
        appearStreams = std::make_unique<AnnotAppearance>(doc, &newAppearance);
        update("AP", std::move(newAppearance));

        if (appearStreams && appearState) {
            appearance = appearStreams->getAppearanceStream(AnnotAppearance::appearNormal, appearState.value());
        }
    }
}

Object Annot::getAppearance() const
{
    return appearance.fetch(doc->getXRef());
}

//------------------------------------------------------------------------
// AnnotPopup
//------------------------------------------------------------------------

AnnotPopup::AnnotPopup(PDFDoc *docA, const PDFRectangle &rectA) : Annot(docA, rectA)
{
    type = typePopup;

    annotObj.dictSet("Subtype", Object::name("Popup"));
    initialize(annotObj.getDict());
}

AnnotPopup::AnnotPopup(PDFDoc *docA, Object &&dictObject, const Object &obj) : Annot(docA, std::move(dictObject), obj)
{
    type = typePopup;
    initialize(annotObj.getDict());
}

AnnotPopup::~AnnotPopup() = default;

void AnnotPopup::initialize(Dict *dict)
{
    const Object &parentObj = dict->lookupNF("Parent");
    if (parentObj.isRef()) {
        parentRef = parentObj.getRef();
    } else {
        parentRef = Ref::INVALID();
    }

    open = dict->lookup("Open").getBoolWithDefaultValue(false);
}

void AnnotPopup::setParent(Annot *parentA)
{
    parentRef = parentA->getRef();
    update("Parent", Object(parentRef));
}

void AnnotPopup::setOpen(bool openA)
{
    open = openA;
    update("Open", Object(open));
}

//------------------------------------------------------------------------
// AnnotMarkup
//------------------------------------------------------------------------
AnnotMarkup::AnnotMarkup(PDFDoc *docA, const PDFRectangle &rectA) : Annot(docA, rectA)
{
    initialize(docA, annotObj.getDict());
}

AnnotMarkup::AnnotMarkup(PDFDoc *docA, Object &&dictObject, const Object &obj) : Annot(docA, std::move(dictObject), obj)
{
    initialize(docA, annotObj.getDict());
}

AnnotMarkup::~AnnotMarkup() = default;

void AnnotMarkup::initialize(PDFDoc *docA, Dict *dict)
{
    Object obj1;

    obj1 = dict->lookup("T");
    if (obj1.isString()) {
        label = obj1.takeString();
    }

    Object popupObj = dict->lookup("Popup");
    const Object &obj2 = dict->lookupNF("Popup");
    if (popupObj.isDict() && obj2.isRef()) {
        popup = std::make_unique<AnnotPopup>(docA, std::move(popupObj), obj2);
    }

    opacity = dict->lookup("CA").getNumWithDefaultValue(1.0);

    obj1 = dict->lookup("CreationDate");
    if (obj1.isString()) {
        date = obj1.takeString();
    }

    const Object &irtObj = dict->lookupNF("IRT");
    if (irtObj.isRef()) {
        inReplyTo = irtObj.getRef();
    } else {
        inReplyTo = Ref::INVALID();
    }

    obj1 = dict->lookup("Subj");
    if (obj1.isString()) {
        subject = obj1.takeString();
    }

    obj1 = dict->lookup("RT");
    if (obj1.isName()) {
        const std::string &replyName = obj1.getNameString();

        if (replyName == "R") {
            replyTo = replyTypeR;
        } else if (replyName == "Group") {
            replyTo = replyTypeGroup;
        } else {
            replyTo = replyTypeR;
        }
    } else {
        replyTo = replyTypeR;
    }

    obj1 = dict->lookup("ExData");
    if (obj1.isDict()) {
        exData = parseAnnotExternalData(obj1.getDict());
    } else {
        exData = annotExternalDataMarkupUnknown;
    }
}

void AnnotMarkup::setLabel(std::unique_ptr<GooString> &&new_label)
{
    if (new_label) {
        label = std::move(new_label);
        // append the unicode marker <FE FF> if needed
        if (!hasUnicodeByteOrderMark(label->toStr())) {
            prependUnicodeByteOrderMark(label->toNonConstStr());
        }
    } else {
        label = std::make_unique<GooString>();
    }

    update("T", Object(std::string { label->toStr() }));
}

void AnnotMarkup::setPopup(std::shared_ptr<AnnotPopup> new_popup)
{
    // If there exists an old popup annotation that is already
    // associated with a page, then we need to remove that
    // popup annotation from the page. Otherwise we would have
    // dangling references to it.
    if (popup && popup->getPageNum() != 0) {
        Page *pageobj = doc->getPage(popup->getPageNum());
        if (pageobj) {
            pageobj->removeAnnot(popup);
        }
    }

    if (new_popup) {
        const Ref popupRef = new_popup->getRef();
        update("Popup", Object(popupRef));

        new_popup->setParent(this);
        popup = std::move(new_popup);

        // If this annotation is already added to a page, then we
        // add the new popup annotation to the same page.
        if (page != 0) {
            Page *pageobj = doc->getPage(page);
            assert(pageobj != nullptr); // pageobj should exist in doc (see setPage())

            pageobj->addAnnot(popup);
        }
    } else {
        popup = nullptr;
    }
}

void AnnotMarkup::setOpacity(double opacityA)
{
    opacity = opacityA;
    update("CA", Object(opacity));
    invalidateAppearance();
}

void AnnotMarkup::setDate(std::unique_ptr<GooString> new_date)
{
    if (new_date) {
        date = std::move(new_date);
        update("CreationDate", Object(std::string { date->toStr() }));
    } else {
        date.reset(nullptr);
        update("CreationDate", Object::null());
    }
}

void AnnotMarkup::removeReferencedObjects()
{
    Page *pageobj = doc->getPage(page);
    assert(pageobj != nullptr); // We're called when removing an annot from a page

    // Remove popup
    if (popup) {
        pageobj->removeAnnot(popup);
    }

    Annot::removeReferencedObjects();
}

//------------------------------------------------------------------------
// AnnotText
//------------------------------------------------------------------------

AnnotText::AnnotText(PDFDoc *docA, const PDFRectangle &rectA) : AnnotMarkup(docA, rectA)
{
    type = typeText;
    flags |= flagNoZoom | flagNoRotate;

    annotObj.dictSet("Subtype", Object::name("Text"));
    initialize(annotObj.getDict());
}

AnnotText::AnnotText(PDFDoc *docA, Object &&dictObject, const Object &obj) : AnnotMarkup(docA, std::move(dictObject), obj)
{

    type = typeText;
    flags |= flagNoZoom | flagNoRotate;
    initialize(annotObj.getDict());
}

AnnotText::~AnnotText() = default;

void AnnotText::initialize(Dict *dict)
{
    Object obj1;

    open = dict->lookup("Open").getBoolWithDefaultValue(false);

    obj1 = dict->lookup("Name");
    if (obj1.isName()) {
        icon = obj1.getNameString();
    } else {
        icon = std::string { "Note" };
    }

    obj1 = dict->lookup("StateModel");
    if (obj1.isString()) {
        const std::string &modelName = obj1.getString();

        Object obj2 = dict->lookup("State");
        if (obj2.isString()) {
            const std::string &stateName = obj2.getString();

            if (stateName == "Marked") {
                state = stateMarked;
            } else if (stateName == "Unmarked") {
                state = stateUnmarked;
            } else if (stateName == "Accepted") {
                state = stateAccepted;
            } else if (stateName == "Rejected") {
                state = stateRejected;
            } else if (stateName == "Cancelled") {
                state = stateCancelled;
            } else if (stateName == "Completed") {
                state = stateCompleted;
            } else if (stateName == "None") {
                state = stateNone;
            } else {
                state = stateUnknown;
            }
        } else {
            state = stateUnknown;
        }

        if (modelName == "Marked") {
            switch (state) {
            case stateUnknown:
                state = stateMarked;
                break;
            case stateAccepted:
            case stateRejected:
            case stateCancelled:
            case stateCompleted:
            case stateNone:
                state = stateUnknown;
                break;
            default:
                break;
            }
        } else if (modelName == "Review") {
            switch (state) {
            case stateUnknown:
                state = stateNone;
                break;
            case stateMarked:
            case stateUnmarked:
                state = stateUnknown;
                break;
            default:
                break;
            }
        } else {
            state = stateUnknown;
        }
    } else {
        state = stateUnknown;
    }
}

void AnnotText::setOpen(bool openA)
{
    open = openA;
    update("Open", Object(open));
}

void AnnotText::setIcon(const std::string &new_icon)
{
    if (icon == new_icon) {
        return;
    }

    if (!new_icon.empty()) {
        icon = new_icon;
    } else {
        icon = "Note";
    }

    update("Name", Object::name(icon));
    invalidateAppearance();
}

#define ANNOT_TEXT_AP_NOTE                                                                                                                                                                                                                     \
    "3.602 24 m 20.398 24 l 22.387 24 24 22.387 24 20.398 c 24 3.602 l 24\n"                                                                                                                                                                   \
    "1.613 22.387 0 20.398 0 c 3.602 0 l 1.613 0 0 1.613 0 3.602 c 0 20.398\n"                                                                                                                                                                 \
    "l 0 22.387 1.613 24 3.602 24 c h\n"                                                                                                                                                                                                       \
    "3.602 24 m f\n"                                                                                                                                                                                                                           \
    "0.533333 0.541176 0.521569 RG 2 w\n"                                                                                                                                                                                                      \
    "1 J\n"                                                                                                                                                                                                                                    \
    "1 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M 9 18 m 4 18 l 4 7 4 4 6 3 c 20 3 l 18 4 18 7 18 18 c 17 18 l S\n"                                                                                                                                                                     \
    "1.5 w\n"                                                                                                                                                                                                                                  \
    "0 j\n"                                                                                                                                                                                                                                    \
    "10 16 m 14 21 l S\n"                                                                                                                                                                                                                      \
    "1.85625 w\n"                                                                                                                                                                                                                              \
    "1 j\n"                                                                                                                                                                                                                                    \
    "15.07 20.523 m 15.07 19.672 14.379 18.977 13.523 18.977 c 12.672 18.977\n"                                                                                                                                                                \
    "11.977 19.672 11.977 20.523 c 11.977 21.379 12.672 22.07 13.523 22.07 c\n"                                                                                                                                                                \
    "14.379 22.07 15.07 21.379 15.07 20.523 c h\n"                                                                                                                                                                                             \
    "15.07 20.523 m S\n"                                                                                                                                                                                                                       \
    "1 w\n"                                                                                                                                                                                                                                    \
    "0 j\n"                                                                                                                                                                                                                                    \
    "6.5 13.5 m 15.5 13.5 l S\n"                                                                                                                                                                                                               \
    "6.5 10.5 m 13.5 10.5 l S\n"                                                                                                                                                                                                               \
    "6.801 7.5 m 15.5 7.5 l S\n"                                                                                                                                                                                                               \
    "0.729412 0.741176 0.713725 RG 2 w\n"                                                                                                                                                                                                      \
    "1 j\n"                                                                                                                                                                                                                                    \
    "9 19 m 4 19 l 4 8 4 5 6 4 c 20 4 l 18 5 18 8 18 19 c 17 19 l S\n"                                                                                                                                                                         \
    "1.5 w\n"                                                                                                                                                                                                                                  \
    "0 j\n"                                                                                                                                                                                                                                    \
    "10 17 m 14 22 l S\n"                                                                                                                                                                                                                      \
    "1.85625 w\n"                                                                                                                                                                                                                              \
    "1 j\n"                                                                                                                                                                                                                                    \
    "15.07 21.523 m 15.07 20.672 14.379 19.977 13.523 19.977 c 12.672 19.977\n"                                                                                                                                                                \
    "11.977 20.672 11.977 21.523 c 11.977 22.379 12.672 23.07 13.523 23.07 c\n"                                                                                                                                                                \
    "14.379 23.07 15.07 22.379 15.07 21.523 c h\n"                                                                                                                                                                                             \
    "15.07 21.523 m S\n"                                                                                                                                                                                                                       \
    "1 w\n"                                                                                                                                                                                                                                    \
    "0 j\n"                                                                                                                                                                                                                                    \
    "6.5 14.5 m 15.5 14.5 l S\n"                                                                                                                                                                                                               \
    "6.5 11.5 m 13.5 11.5 l S\n"                                                                                                                                                                                                               \
    "6.801 8.5 m 15.5 8.5 l S\n"

#define ANNOT_TEXT_AP_COMMENT                                                                                                                                                                                                                  \
    "4.301 23 m 19.699 23 l 21.523 23 23 21.523 23 19.699 c 23 4.301 l 23\n"                                                                                                                                                                   \
    "2.477 21.523 1 19.699 1 c 4.301 1 l 2.477 1 1 2.477 1 4.301 c 1 19.699\n"                                                                                                                                                                 \
    "l 1 21.523 2.477 23 4.301 23 c h\n"                                                                                                                                                                                                       \
    "4.301 23 m f\n"                                                                                                                                                                                                                           \
    "0.533333 0.541176 0.521569 RG 2 w\n"                                                                                                                                                                                                      \
    "0 J\n"                                                                                                                                                                                                                                    \
    "1 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M 8 20 m 16 20 l 18.363 20 20 18.215 20 16 c 20 13 l 20 10.785 18.363 9\n"                                                                                                                                                              \
    "16 9 c 13 9 l 8 3 l 8 9 l 8 9 l 5.637 9 4 10.785 4 13 c 4 16 l 4 18.215\n"                                                                                                                                                                \
    "5.637 20 8 20 c h\n"                                                                                                                                                                                                                      \
    "8 20 m S\n"                                                                                                                                                                                                                               \
    "0.729412 0.741176 0.713725 RG 8 21 m 16 21 l 18.363 21 20 19.215 20 17\n"                                                                                                                                                                 \
    "c 20 14 l 20 11.785 18.363 10\n"                                                                                                                                                                                                          \
    "16 10 c 13 10 l 8 4 l 8 10 l 8 10 l 5.637 10 4 11.785 4 14 c 4 17 l 4\n"                                                                                                                                                                  \
    "19.215 5.637 21 8 21 c h\n"                                                                                                                                                                                                               \
    "8 21 m S\n"

#define ANNOT_TEXT_AP_KEY                                                                                                                                                                                                                      \
    "4.301 23 m 19.699 23 l 21.523 23 23 21.523 23 19.699 c 23 4.301 l 23\n"                                                                                                                                                                   \
    "2.477 21.523 1 19.699 1 c 4.301 1 l 2.477 1 1 2.477 1 4.301 c 1 19.699\n"                                                                                                                                                                 \
    "l 1 21.523 2.477 23 4.301 23 c h\n"                                                                                                                                                                                                       \
    "4.301 23 m f\n"                                                                                                                                                                                                                           \
    "0.533333 0.541176 0.521569 RG 2 w\n"                                                                                                                                                                                                      \
    "1 J\n"                                                                                                                                                                                                                                    \
    "0 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M 11.895 18.754 m 13.926 20.625 17.09 20.496 18.961 18.465 c 20.832\n"                                                                                                                                                                  \
    "16.434 20.699 13.27 18.668 11.398 c 17.164 10.016 15.043 9.746 13.281\n"                                                                                                                                                                  \
    "10.516 c 12.473 9.324 l 11.281 10.078 l 9.547 8.664 l 9.008 6.496 l\n"                                                                                                                                                                    \
    "7.059 6.059 l 6.34 4.121 l 5.543 3.668 l 3.375 4.207 l 2.938 6.156 l\n"                                                                                                                                                                   \
    "10.57 13.457 l 9.949 15.277 10.391 17.367 11.895 18.754 c h\n"                                                                                                                                                                            \
    "11.895 18.754 m S\n"                                                                                                                                                                                                                      \
    "1.5 w\n"                                                                                                                                                                                                                                  \
    "16.059 15.586 m 16.523 15.078 17.316 15.043 17.824 15.512 c 18.332\n"                                                                                                                                                                     \
    "15.98 18.363 16.77 17.895 17.277 c 17.43 17.785 16.637 17.816 16.129\n"                                                                                                                                                                   \
    "17.352 c 15.621 16.883 15.59 16.094 16.059 15.586 c h\n"                                                                                                                                                                                  \
    "16.059 15.586 m S\n"                                                                                                                                                                                                                      \
    "0.729412 0.741176 0.713725 RG 2 w\n"                                                                                                                                                                                                      \
    "11.895 19.754 m 13.926 21.625 17.09 21.496 18.961 19.465 c 20.832\n"                                                                                                                                                                      \
    "17.434 20.699 14.27 18.668 12.398 c 17.164 11.016 15.043 10.746 13.281\n"                                                                                                                                                                 \
    "11.516 c 12.473 10.324 l 11.281 11.078 l 9.547 9.664 l 9.008 7.496 l\n"                                                                                                                                                                   \
    "7.059 7.059 l 6.34 5.121 l 5.543 4.668 l 3.375 5.207 l 2.938 7.156 l\n"                                                                                                                                                                   \
    "10.57 14.457 l 9.949 16.277 10.391 18.367 11.895 19.754 c h\n"                                                                                                                                                                            \
    "11.895 19.754 m S\n"                                                                                                                                                                                                                      \
    "1.5 w\n"                                                                                                                                                                                                                                  \
    "16.059 16.586 m 16.523 16.078 17.316 16.043 17.824 16.512 c 18.332\n"                                                                                                                                                                     \
    "16.98 18.363 17.77 17.895 18.277 c 17.43 18.785 16.637 18.816 16.129\n"                                                                                                                                                                   \
    "18.352 c 15.621 17.883 15.59 17.094 16.059 16.586 c h\n"                                                                                                                                                                                  \
    "16.059 16.586 m S\n"

#define ANNOT_TEXT_AP_HELP                                                                                                                                                                                                                     \
    "4.301 23 m 19.699 23 l 21.523 23 23 21.523 23 19.699 c 23 4.301 l 23\n"                                                                                                                                                                   \
    "2.477 21.523 1 19.699 1 c 4.301 1 l 2.477 1 1 2.477 1 4.301 c 1 19.699\n"                                                                                                                                                                 \
    "l 1 21.523 2.477 23 4.301 23 c h\n"                                                                                                                                                                                                       \
    "4.301 23 m f\n"                                                                                                                                                                                                                           \
    "0.533333 0.541176 0.521569 RG 2.5 w\n"                                                                                                                                                                                                    \
    "1 J\n"                                                                                                                                                                                                                                    \
    "1 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M 8.289 16.488 m 8.824 17.828 10.043 18.773 11.473 18.965 c 12.902 19.156\n"                                                                                                                                                            \
    "14.328 18.559 15.195 17.406 c 16.062 16.254 16.242 14.723 15.664 13.398\n"                                                                                                                                                                \
    "c S\n"                                                                                                                                                                                                                                    \
    "0 j\n"                                                                                                                                                                                                                                    \
    "12 8 m 12 12 16 11 16 15 c S\n"                                                                                                                                                                                                           \
    "1.539286 w\n"                                                                                                                                                                                                                             \
    "1 j\n"                                                                                                                                                                                                                                    \
    "q 1 0 0 -0.999991 0 24 cm\n"                                                                                                                                                                                                              \
    "12.684 20.891 m 12.473 21.258 12.004 21.395 11.629 21.196 c 11.254\n"                                                                                                                                                                     \
    "20.992 11.105 20.531 11.297 20.149 c 11.488 19.77 11.945 19.61 12.332\n"                                                                                                                                                                  \
    "19.789 c 12.719 19.969 12.891 20.426 12.719 20.817 c S Q\n"                                                                                                                                                                               \
    "0.729412 0.741176 0.713725 RG 2.5 w\n"                                                                                                                                                                                                    \
    "8.289 17.488 m 9.109 19.539 11.438 20.535 13.488 19.711 c 15.539 18.891\n"                                                                                                                                                                \
    "16.535 16.562 15.711 14.512 c 15.699 14.473 15.684 14.438 15.664 14.398\n"                                                                                                                                                                \
    "c S\n"                                                                                                                                                                                                                                    \
    "0 j\n"                                                                                                                                                                                                                                    \
    "12 9 m 12 13 16 12 16 16 c S\n"                                                                                                                                                                                                           \
    "1.539286 w\n"                                                                                                                                                                                                                             \
    "1 j\n"                                                                                                                                                                                                                                    \
    "q 1 0 0 -0.999991 0 24 cm\n"                                                                                                                                                                                                              \
    "12.684 19.891 m 12.473 20.258 12.004 20.395 11.629 20.195 c 11.254\n"                                                                                                                                                                     \
    "19.992 11.105 19.531 11.297 19.149 c 11.488 18.77 11.945 18.61 12.332\n"                                                                                                                                                                  \
    "18.789 c 12.719 18.969 12.891 19.426 12.719 19.817 c S Q\n"

#define ANNOT_TEXT_AP_NEW_PARAGRAPH                                                                                                                                                                                                            \
    "4.301 23 m 19.699 23 l 21.523 23 23 21.523 23 19.699 c 23 4.301 l 23\n"                                                                                                                                                                   \
    "2.477 21.523 1 19.699 1 c 4.301 1 l 2.477 1 1 2.477 1 4.301 c 1 19.699\n"                                                                                                                                                                 \
    "l 1 21.523 2.477 23 4.301 23 c h\n"                                                                                                                                                                                                       \
    "4.301 23 m f\n"                                                                                                                                                                                                                           \
    "0.533333 0.541176 0.521569 RG 4 w\n"                                                                                                                                                                                                      \
    "0 J\n"                                                                                                                                                                                                                                    \
    "2 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M q 1 0 0 -1 0 24 cm\n"                                                                                                                                                                                                                 \
    "9.211 11.988 m 8.449 12.07 7.711 11.707 7.305 11.059 c 6.898 10.41\n"                                                                                                                                                                     \
    "6.898 9.59 7.305 8.941 c 7.711 8.293 8.449 7.93 9.211 8.012 c S Q\n"                                                                                                                                                                      \
    "1.004413 w\n"                                                                                                                                                                                                                             \
    "1 J\n"                                                                                                                                                                                                                                    \
    "1 j\n"                                                                                                                                                                                                                                    \
    "q 1 0 0 -0.991232 0 24 cm\n"                                                                                                                                                                                                              \
    "18.07 11.511 m 15.113 10.014 l 12.199 11.602 l 12.711 8.323 l 10.301\n"                                                                                                                                                                   \
    "6.045 l 13.574 5.517 l 14.996 2.522 l 16.512 5.474 l 19.801 5.899 l\n"                                                                                                                                                                    \
    "17.461 8.252 l 18.07 11.511 l h\n"                                                                                                                                                                                                        \
    "18.07 11.511 m S Q\n"                                                                                                                                                                                                                     \
    "2 w\n"                                                                                                                                                                                                                                    \
    "0 j\n"                                                                                                                                                                                                                                    \
    "11 17 m 10 17 l 10 3 l S\n"                                                                                                                                                                                                               \
    "14 3 m 14 13 l S\n"                                                                                                                                                                                                                       \
    "0.729412 0.741176 0.713725 RG 4 w\n"                                                                                                                                                                                                      \
    "0 J\n"                                                                                                                                                                                                                                    \
    "2 j\n"                                                                                                                                                                                                                                    \
    "q 1 0 0 -1 0 24 cm\n"                                                                                                                                                                                                                     \
    "9.211 10.988 m 8.109 11.105 7.125 10.309 7.012 9.211 c 6.895 8.109\n"                                                                                                                                                                     \
    "7.691 7.125 8.789 7.012 c 8.93 6.996 9.07 6.996 9.211 7.012 c S Q\n"                                                                                                                                                                      \
    "1.004413 w\n"                                                                                                                                                                                                                             \
    "1 J\n"                                                                                                                                                                                                                                    \
    "1 j\n"                                                                                                                                                                                                                                    \
    "q 1 0 0 -0.991232 0 24 cm\n"                                                                                                                                                                                                              \
    "18.07 10.502 m 15.113 9.005 l 12.199 10.593 l 12.711 7.314 l 10.301\n"                                                                                                                                                                    \
    "5.036 l 13.574 4.508 l 14.996 1.513 l 16.512 4.465 l 19.801 4.891 l\n"                                                                                                                                                                    \
    "17.461 7.243 l 18.07 10.502 l h\n"                                                                                                                                                                                                        \
    "18.07 10.502 m S Q\n"                                                                                                                                                                                                                     \
    "2 w\n"                                                                                                                                                                                                                                    \
    "0 j\n"                                                                                                                                                                                                                                    \
    "11 18 m 10 18 l 10 4 l S\n"                                                                                                                                                                                                               \
    "14 4 m 14 14 l S\n"

#define ANNOT_TEXT_AP_PARAGRAPH                                                                                                                                                                                                                \
    "4.301 23 m 19.699 23 l 21.523 23 23 21.523 23 19.699 c 23 4.301 l 23\n"                                                                                                                                                                   \
    "2.477 21.523 1 19.699 1 c 4.301 1 l 2.477 1 1 2.477 1 4.301 c 1 19.699\n"                                                                                                                                                                 \
    "l 1 21.523 2.477 23 4.301 23 c h\n"                                                                                                                                                                                                       \
    "4.301 23 m f\n"                                                                                                                                                                                                                           \
    "0.533333 0.541176 0.521569 RG 2 w\n"                                                                                                                                                                                                      \
    "1 J\n"                                                                                                                                                                                                                                    \
    "1 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M 15 3 m 15 18 l 11 18 l 11 3 l S\n"                                                                                                                                                                                                    \
    "4 w\n"                                                                                                                                                                                                                                    \
    "q 1 0 0 -1 0 24 cm\n"                                                                                                                                                                                                                     \
    "9.777 10.988 m 8.746 10.871 7.973 9.988 8 8.949 c 8.027 7.91 8.844\n"                                                                                                                                                                     \
    "7.066 9.879 7.004 c S Q\n"                                                                                                                                                                                                                \
    "0.729412 0.741176 0.713725 RG 2 w\n"                                                                                                                                                                                                      \
    "15 4 m 15 19 l 11 19 l 11 4 l S\n"                                                                                                                                                                                                        \
    "4 w\n"                                                                                                                                                                                                                                    \
    "q 1 0 0 -1 0 24 cm\n"                                                                                                                                                                                                                     \
    "9.777 9.988 m 8.746 9.871 7.973 8.988 8 7.949 c 8.027 6.91 8.844 6.066\n"                                                                                                                                                                 \
    "9.879 6.004 c S Q\n"

#define ANNOT_TEXT_AP_INSERT                                                                                                                                                                                                                   \
    "4.301 23 m 19.699 23 l 21.523 23 23 21.523 23 19.699 c 23 4.301 l 23\n"                                                                                                                                                                   \
    "2.477 21.523 1 19.699 1 c 4.301 1 l 2.477 1 1 2.477 1 4.301 c 1 19.699\n"                                                                                                                                                                 \
    "l 1 21.523 2.477 23 4.301 23 c h\n"                                                                                                                                                                                                       \
    "4.301 23 m f\n"                                                                                                                                                                                                                           \
    "0.533333 0.541176 0.521569 RG 2 w\n"                                                                                                                                                                                                      \
    "1 J\n"                                                                                                                                                                                                                                    \
    "0 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M 12 18.012 m 20 18 l S\n"                                                                                                                                                                                                              \
    "9 10 m 17 10 l S\n"                                                                                                                                                                                                                       \
    "12 14.012 m 20 14 l S\n"                                                                                                                                                                                                                  \
    "12 6.012 m 20 6.012 l S\n"                                                                                                                                                                                                                \
    "4 12 m 6 10 l 4 8 l S\n"                                                                                                                                                                                                                  \
    "4 12 m 4 8 l S\n"                                                                                                                                                                                                                         \
    "0.729412 0.741176 0.713725 RG 12 19.012 m 20 19 l S\n"                                                                                                                                                                                    \
    "9 11 m 17 11 l S\n"                                                                                                                                                                                                                       \
    "12 15.012 m 20 15 l S\n"                                                                                                                                                                                                                  \
    "12 7.012 m 20 7.012 l S\n"                                                                                                                                                                                                                \
    "4 13 m 6 11 l 4 9 l S\n"                                                                                                                                                                                                                  \
    "4 13 m 4 9 l S\n"

#define ANNOT_TEXT_AP_CROSS                                                                                                                                                                                                                    \
    "4.301 23 m 19.699 23 l 21.523 23 23 21.523 23 19.699 c 23 4.301 l 23\n"                                                                                                                                                                   \
    "2.477 21.523 1 19.699 1 c 4.301 1 l 2.477 1 1 2.477 1 4.301 c 1 19.699\n"                                                                                                                                                                 \
    "l 1 21.523 2.477 23 4.301 23 c h\n"                                                                                                                                                                                                       \
    "4.301 23 m f\n"                                                                                                                                                                                                                           \
    "0.533333 0.541176 0.521569 RG 2.5 w\n"                                                                                                                                                                                                    \
    "1 J\n"                                                                                                                                                                                                                                    \
    "0 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M 18 5 m 6 17 l S\n"                                                                                                                                                                                                                    \
    "6 5 m 18 17 l S\n"                                                                                                                                                                                                                        \
    "0.729412 0.741176 0.713725 RG 18 6 m 6 18 l S\n"                                                                                                                                                                                          \
    "6 6 m 18 18 l S\n"

#define ANNOT_TEXT_AP_CIRCLE                                                                                                                                                                                                                   \
    "4.301 23 m 19.699 23 l 21.523 23 23 21.523 23 19.699 c 23 4.301 l 23\n"                                                                                                                                                                   \
    "2.477 21.523 1 19.699 1 c 4.301 1 l 2.477 1 1 2.477 1 4.301 c 1 19.699\n"                                                                                                                                                                 \
    "l 1 21.523 2.477 23 4.301 23 c h\n"                                                                                                                                                                                                       \
    "4.301 23 m f\n"                                                                                                                                                                                                                           \
    "0.533333 0.541176 0.521569 RG 2.5 w\n"                                                                                                                                                                                                    \
    "1 J\n"                                                                                                                                                                                                                                    \
    "1 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M 19.5 11.5 m 19.5 7.359 16.141 4 12 4 c 7.859 4 4.5 7.359 4.5 11.5 c 4.5\n"                                                                                                                                                            \
    "15.641 7.859 19 12 19 c 16.141 19 19.5 15.641 19.5 11.5 c h\n"                                                                                                                                                                            \
    "19.5 11.5 m S\n"                                                                                                                                                                                                                          \
    "0.729412 0.741176 0.713725 RG 19.5 12.5 m 19.5 8.359 16.141 5 12 5 c\n"                                                                                                                                                                   \
    "7.859 5 4.5 8.359 4.5 12.5 c 4.5\n"                                                                                                                                                                                                       \
    "16.641 7.859 20 12 20 c 16.141 20 19.5 16.641 19.5 12.5 c h\n"                                                                                                                                                                            \
    "19.5 12.5 m S\n"

#define ANNOT_TEXT_AP_CHECK                                                                                                                                                                                                                    \
    "0.8 0.2 0.8 RG 4.0 w\n"                                                                                                                                                                                                                   \
    "1 J\n"                                                                                                                                                                                                                                    \
    "1 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M 6 12 m 10 8 l S\n"                                                                                                                                                                                                                    \
    "10 8 m 18 16 l S\n"

#define ANNOT_TEXT_AP_STAR                                                                                                                                                                                                                     \
    "0.2 0.8 0.6 RG 2.5 w\n"                                                                                                                                                                                                                   \
    "1 J\n"                                                                                                                                                                                                                                    \
    "1 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M 12 22 m 15.4 15.8 l 22 14.8 l 17 10 l 18.2 3.2 l 12 6.4 l 5.8 3.2 l 7 10 l 2 14.8 l 8.6 15.8 l h\n"                                                                                                                                   \
    "S\n"

#define ANNOT_TEXT_AP_RIGHT_ARROW                                                                                                                                                                                                              \
    "0.533333 0.541176 0.521569 RG 2.5 w\n"                                                                                                                                                                                                    \
    "1 J\n"                                                                                                                                                                                                                                    \
    "1 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M 19.5 12 m 19.5 15.866 16.366 19 12.5 19 c 8.634 19 5.5 15.866 5.5\n"                                                                                                                                                                  \
    "12 c 5.5 8.134 8.634 5 12.5 5 c 16.366 5 19.5 8.134 19.5 12 c h\n"                                                                                                                                                                        \
    "19.5 12 m S\n"                                                                                                                                                                                                                            \
    "8 12 m 16 12 l S\n"                                                                                                                                                                                                                       \
    "13 9 m 16 12 l 13 15 l S\n"

#define ANNOT_TEXT_AP_RIGHT_POINTER                                                                                                                                                                                                            \
    "0.9 0.4 0.2 rg\n"                                                                                                                                                                                                                         \
    "4 M 6 8 m 6 16 l 18 12 l h\n"                                                                                                                                                                                                             \
    "f\n"

#define ANNOT_TEXT_AP_UP_ARROW                                                                                                                                                                                                                 \
    "0.2 0.6 0.9 RG 2.5 w\n"                                                                                                                                                                                                                   \
    "1 J\n"                                                                                                                                                                                                                                    \
    "1 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M 12 6 m 12 18 l S\n"                                                                                                                                                                                                                   \
    "9 15 m 12 18 l 15 15 l S\n"

#define ANNOT_TEXT_AP_UP_LEFT_ARROW                                                                                                                                                                                                            \
    "0.9 0.2 0.8 RG 2.5 w\n"                                                                                                                                                                                                                   \
    "1 J\n"                                                                                                                                                                                                                                    \
    "1 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M 18 6 m 6 18 l S\n"                                                                                                                                                                                                                    \
    "6 18 m 11 18 l S\n"                                                                                                                                                                                                                       \
    "6 18 m 6 13 l S\n"

#define ANNOT_TEXT_AP_CROSS_HAIRS                                                                                                                                                                                                              \
    "0.2 0.8 0.3 RG 2.5 w\n"                                                                                                                                                                                                                   \
    "1 J\n"                                                                                                                                                                                                                                    \
    "1 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M 12 10 m 12 14 l S\n"                                                                                                                                                                                                                  \
    "10 12 m 14 12 l S\n"                                                                                                                                                                                                                      \
    "17 12 m 17 9.239 14.761 7 12 7 c 9.239 7 7 9.239 7 12 c 7 14.761 9.239 17 12 17 c 14.761 17 17 14.761 17 12 c h S\n"

void AnnotText::draw(Gfx *gfx, bool printing)
{
    double ca = 1;

    if (!isVisible(printing)) {
        return;
    }

    annotLocker();
    if (appearance.isNull()) {
        ca = opacity;

        AnnotAppearanceBuilder appearBuilder;

        appearBuilder.append("q\n");
        if (color) {
            appearBuilder.setDrawColor(*color, true);
        } else {
            appearBuilder.append("1 1 1 rg\n");
        }
        if (icon == "Note") {
            appearBuilder.append(ANNOT_TEXT_AP_NOTE);
        } else if (icon == "Comment") {
            appearBuilder.append(ANNOT_TEXT_AP_COMMENT);
        } else if (icon == "Key") {
            appearBuilder.append(ANNOT_TEXT_AP_KEY);
        } else if (icon == "Help") {
            appearBuilder.append(ANNOT_TEXT_AP_HELP);
        } else if (icon == "NewParagraph") {
            appearBuilder.append(ANNOT_TEXT_AP_NEW_PARAGRAPH);
        } else if (icon == "Paragraph") {
            appearBuilder.append(ANNOT_TEXT_AP_PARAGRAPH);
        } else if (icon == "Insert") {
            appearBuilder.append(ANNOT_TEXT_AP_INSERT);
        } else if (icon == "Cross") {
            appearBuilder.append(ANNOT_TEXT_AP_CROSS);
        } else if (icon == "Circle") {
            appearBuilder.append(ANNOT_TEXT_AP_CIRCLE);
        } else if (icon == "Check") {
            appearBuilder.append(ANNOT_TEXT_AP_CHECK);
        } else if (icon == "Star") {
            appearBuilder.append(ANNOT_TEXT_AP_STAR);
        } else if (icon == "RightArrow") {
            appearBuilder.append(ANNOT_TEXT_AP_RIGHT_ARROW);
        } else if (icon == "RightPointer") {
            appearBuilder.append(ANNOT_TEXT_AP_RIGHT_POINTER);
        } else if (icon == "UpArrow") {
            appearBuilder.append(ANNOT_TEXT_AP_UP_ARROW);
        } else if (icon == "UpLeftArrow") {
            appearBuilder.append(ANNOT_TEXT_AP_UP_LEFT_ARROW);
        } else if (icon == "CrossHairs") {
            appearBuilder.append(ANNOT_TEXT_AP_CROSS_HAIRS);
        }
        appearBuilder.append("Q\n");

        // Force 24x24 rectangle
        PDFRectangle fixedRect(rect->x1, rect->y2 - 24, rect->x1 + 24, rect->y2);
        appearBBox = std::make_unique<AnnotAppearanceBBox>(fixedRect);
        const std::array<double, 4> bbox = appearBBox->getBBoxRect();
        if (ca == 1) {
            appearance = createForm(appearBuilder.buffer(), bbox, false, Object {});
        } else {
            Object aStream = createForm(appearBuilder.buffer(), bbox, true, Object {});

            std::string appearBuf("/GS0 gs\n/Fm0 Do");
            std::unique_ptr<Dict> resDict = createResourcesDict("Fm0", std::move(aStream), "GS0", ca, nullptr);
            appearance = createForm(appearBuf, bbox, false, std::move(resDict));
        }
    }

    // draw the appearance stream
    Object obj = appearance.fetch(gfx->getXRef());
    if (appearBBox) {
        gfx->drawAnnot(&obj, nullptr, color.get(), appearBBox->getPageXMin(), appearBBox->getPageYMin(), appearBBox->getPageXMax(), appearBBox->getPageYMax(), getRotation());
    } else {
        gfx->drawAnnot(&obj, nullptr, color.get(), rect->x1, rect->y1, rect->x2, rect->y2, getRotation());
    }
}

//------------------------------------------------------------------------
// AnnotLink
//------------------------------------------------------------------------
AnnotLink::AnnotLink(PDFDoc *docA, const PDFRectangle &rectA) : Annot(docA, rectA)
{
    type = typeLink;
    annotObj.dictSet("Subtype", Object::name("Link"));
    initialize(annotObj.getDict());
}

AnnotLink::AnnotLink(PDFDoc *docA, Object &&dictObject, const Object &obj) : Annot(docA, std::move(dictObject), obj)
{

    type = typeLink;
    initialize(annotObj.getDict());
}

AnnotLink::~AnnotLink() = default;

void AnnotLink::initialize(Dict *dict)
{
    Object obj1;

    // look for destination
    obj1 = dict->lookup("Dest");
    if (!obj1.isNull()) {
        action = LinkAction::parseDest(&obj1);
        // look for action
    } else {
        obj1 = dict->lookup("A");
        if (obj1.isDict()) {
            action = LinkAction::parseAction(&obj1, doc->getCatalog()->getBaseURI());
        }
    }

    obj1 = dict->lookup("H");
    if (obj1.isName()) {
        const std::string &effect = obj1.getNameString();

        if (effect == "N") {
            linkEffect = effectNone;
        } else if (effect == "I") {
            linkEffect = effectInvert;
        } else if (effect == "O") {
            linkEffect = effectOutline;
        } else if (effect == "P") {
            linkEffect = effectPush;
        } else {
            linkEffect = effectInvert;
        }
    } else {
        linkEffect = effectInvert;
    }
    /*
    obj1 = dict->lookup("PA");
    if (obj1.isDict()) {
      uriAction = NULL;
    } else {
      uriAction = NULL;
    }
    obj1.free();
    */
    obj1 = dict->lookup("QuadPoints");
    if (obj1.isArray()) {
        quadrilaterals = std::make_unique<AnnotQuadrilaterals>(*obj1.getArray());
    }

    obj1 = dict->lookup("BS");
    if (obj1.isDict()) {
        border = std::make_unique<AnnotBorderBS>(obj1.getDict());
    } else if (!border) {
        border = std::make_unique<AnnotBorderBS>();
    }
}

void AnnotLink::draw(Gfx *gfx, bool printing)
{
    if (!isVisible(printing)) {
        return;
    }

    annotLocker();
    // draw the appearance stream
    Object obj = appearance.fetch(gfx->getXRef());
    gfx->drawAnnot(&obj, border.get(), color.get(), rect->x1, rect->y1, rect->x2, rect->y2, getRotation());
}

//------------------------------------------------------------------------
// AnnotFreeText
//------------------------------------------------------------------------
const double AnnotFreeText::undefinedFontPtSize = 10.;

AnnotFreeText::AnnotFreeText(PDFDoc *docA, const PDFRectangle &rectA) : AnnotMarkup(docA, rectA)
{
    type = typeFreeText;

    annotObj.dictSet("Subtype", Object::name("FreeText"));
    annotObj.dictSet("DA", Object(std::string {}));

    initialize(annotObj.getDict());
}

AnnotFreeText::AnnotFreeText(PDFDoc *docA, Object &&dictObject, const Object &obj) : AnnotMarkup(docA, std::move(dictObject), obj)
{
    type = typeFreeText;
    initialize(annotObj.getDict());
}

AnnotFreeText::~AnnotFreeText() = default;

void AnnotFreeText::initialize(Dict *dict)
{
    Object obj1;

    obj1 = dict->lookup("DA");
    if (obj1.isString()) {
        appearanceString = std::move(obj1.takeString()->toNonConstStr());
    } else {
        appearanceString.clear();
        error(errSyntaxWarning, -1, "Bad appearance for annotation");
    }

    obj1 = dict->lookup("Q");
    if (obj1.isInt()) {
        quadding = static_cast<VariableTextQuadding>(obj1.getInt());
    } else {
        quadding = VariableTextQuadding::leftJustified;
    }

    obj1 = dict->lookup("DS");
    if (obj1.isString()) {
        styleString = obj1.takeString();
    }

    obj1 = dict->lookup("CL");
    if (obj1.isArrayOfLengthAtLeast(4)) {
        const double x1 = obj1.arrayGet(0).getNumWithDefaultValue(0);
        const double y1 = obj1.arrayGet(1).getNumWithDefaultValue(0);
        const double x2 = obj1.arrayGet(2).getNumWithDefaultValue(0);
        const double y2 = obj1.arrayGet(3).getNumWithDefaultValue(0);

        if (obj1.arrayGetLength() == 6) {
            const double x3 = obj1.arrayGet(4).getNumWithDefaultValue(0);
            const double y3 = obj1.arrayGet(5).getNumWithDefaultValue(0);
            calloutLine = std::make_unique<AnnotCalloutMultiLine>(x1, y1, x2, y2, x3, y3);
        } else {
            calloutLine = std::make_unique<AnnotCalloutLine>(x1, y1, x2, y2);
        }
    }

    obj1 = dict->lookup("IT");
    if (obj1.isName()) {
        const std::string &intentName = obj1.getNameString();

        if (intentName == "FreeText") {
            intent = intentFreeText;
        } else if (intentName == "FreeTextCallout") {
            intent = intentFreeTextCallout;
        } else if (intentName == "FreeTextTypeWriter") {
            intent = intentFreeTextTypeWriter;
        } else {
            intent = intentFreeText;
        }
    } else {
        intent = intentFreeText;
    }

    obj1 = dict->lookup("BS");
    if (obj1.isDict()) {
        border = std::make_unique<AnnotBorderBS>(obj1.getDict());
    } else if (!border) {
        border = std::make_unique<AnnotBorderBS>();
    }

    obj1 = dict->lookup("BE");
    if (obj1.isDict()) {
        borderEffect = std::make_unique<AnnotBorderEffect>(obj1.getDict());
    }

    obj1 = dict->lookup("RD");
    if (obj1.isArray()) {
        rectangle = parseDiffRectangle(obj1.getArray(), rect.get());
    }

    obj1 = dict->lookup("LE");
    if (obj1.isName()) {
        endStyle = parseAnnotLineEndingStyle(obj1);
    } else {
        endStyle = annotLineEndingNone;
    }
}

void AnnotFreeText::setContents(std::unique_ptr<GooString> &&new_content)
{
    Annot::setContents(std::move(new_content));
    invalidateAppearance();
}

void AnnotFreeText::setDefaultAppearance(const DefaultAppearance &da)
{
    appearanceString = da.toAppearanceString();

    update("DA", Object(std::string { appearanceString }));
    invalidateAppearance();
}

void AnnotFreeText::setQuadding(VariableTextQuadding new_quadding)
{
    quadding = new_quadding;
    update("Q", Object(static_cast<int>(quadding)));
    invalidateAppearance();
}

void AnnotFreeText::setStyleString(GooString *new_string)
{
    if (new_string) {
        styleString = new_string->copy();
        // append the unicode marker <FE FF> if needed
        if (!hasUnicodeByteOrderMark(styleString->toStr())) {
            prependUnicodeByteOrderMark(styleString->toNonConstStr());
        }
    } else {
        styleString = std::make_unique<GooString>();
    }

    update("DS", Object(std::string { styleString->toStr() }));
}

void AnnotFreeText::setCalloutLine(std::unique_ptr<AnnotCalloutLine> &&line)
{
    Object obj1;
    if (line == nullptr) {
        obj1.setToNull();
        calloutLine = nullptr;
    } else {
        double x1 = line->getX1(), y1 = line->getY1();
        double x2 = line->getX2(), y2 = line->getY2();
        auto array = std::make_unique<Array>(doc->getXRef());
        array->add(Object(x1));
        array->add(Object(y1));
        array->add(Object(x2));
        array->add(Object(y2));

        auto *mline = dynamic_cast<AnnotCalloutMultiLine *>(line.get());
        if (mline) {
            double x3 = mline->getX3(), y3 = mline->getY3();
            array->add(Object(x3));
            array->add(Object(y3));
        }
        obj1 = Object(std::move(array));
        calloutLine = std::move(line);
    }

    update("CL", std::move(obj1));
    invalidateAppearance();
}

void AnnotFreeText::setIntent(AnnotFreeTextIntent new_intent)
{
    const char *intentName;

    intent = new_intent;
    if (new_intent == intentFreeText) {
        intentName = "FreeText";
    } else if (new_intent == intentFreeTextCallout) {
        intentName = "FreeTextCallout";
    } else { // intentFreeTextTypeWriter
        intentName = "FreeTextTypeWriter";
    }
    update("IT", Object::name(intentName));
}

std::unique_ptr<DefaultAppearance> AnnotFreeText::getDefaultAppearance() const
{
    return std::make_unique<DefaultAppearance>(appearanceString);
}

static std::unique_ptr<GfxFont> createAnnotDrawFont(XRef *xref, Dict *fontParentDict, std::string_view resourceName = "AnnotDrawFont", const char *fontname = "Helvetica")
{
    const Ref dummyRef = { .num = -1, .gen = -1 };

    auto fontDict = std::make_unique<Dict>(xref);
    fontDict->add("BaseFont", Object::name(fontname));
    fontDict->add("Subtype", Object::name("Type1"));
    if ((strcmp(fontname, "ZapfDingbats") != 0) && (strcmp(fontname, "Symbol") != 0)) {
        fontDict->add("Encoding", Object::name("WinAnsiEncoding"));
    }

    Object fontsDictObj = fontParentDict->lookup("Font");
    if (!fontsDictObj.isDict()) {
        fontsDictObj = Object(std::make_unique<Dict>(xref));
        fontParentDict->add("Font", fontsDictObj.copy()); // This is not a copy it's a ref
    }

    auto font = GfxFont::makeFont(xref, resourceName, dummyRef, *fontDict);
    fontsDictObj.dictSet(resourceName, Object(std::move(fontDict)));
    return font;
}

class HorizontalTextLayouter
{
public:
    HorizontalTextLayouter() = default;

    HorizontalTextLayouter(const std::string &text, const Form *form, const GfxFont &font, std::optional<double> availableWidth, const bool noReencode)
    {
        size_t i = 0;
        double blockWidth;
        bool newFontNeeded = false;
        GooString outputText;
        const bool isUnicode = hasUnicodeByteOrderMark(text);
        int charCount;

        Annot::layoutText(text, &outputText, &i, font, &blockWidth, availableWidth ? *availableWidth : 0.0, &charCount, noReencode, !noReencode ? &newFontNeeded : nullptr);
        data.emplace_back(outputText.toStr(), std::string(), blockWidth, charCount);
        if (availableWidth) {
            *availableWidth -= blockWidth;
        }

        while (newFontNeeded && (!availableWidth || *availableWidth > 0 || (isUnicode && i == 2) || (!isUnicode && i == 0))) {
            if (!form) {
                // There's no fonts to look for, so just skip the characters
                i += isUnicode ? 2 : 1;
                error(errSyntaxError, -1, "HorizontalTextLayouter, found character that the font can't represent");
                newFontNeeded = false;
            } else {
                Unicode uChar;
                if (isUnicode) {
                    uChar = static_cast<unsigned char>(text[i]) << 8;
                    uChar += static_cast<unsigned char>(text[i + 1]);
                } else {
                    uChar = pdfDocEncoding[text[i] & 0xff];
                }
                const std::string auxFontName = form->getFallbackFontForChar(uChar, font);
                if (!auxFontName.empty()) {
                    std::shared_ptr<GfxFont> auxFont = form->getDefaultResources()->lookupFont(auxFontName);

                    // Here we just layout one char, we don't know if the one afterwards can be layouted with the original font
                    GooString auxContents = GooString(text.substr(i, isUnicode ? 2 : 1));
                    if (isUnicode) {
                        prependUnicodeByteOrderMark(auxContents.toNonConstStr());
                    }
                    size_t auxI = 0;
                    Annot::layoutText(auxContents.toStr(), &outputText, &auxI, *auxFont, &blockWidth, availableWidth ? *availableWidth : 0.0, &charCount, false, &newFontNeeded);
                    assert(!newFontNeeded);
                    if (availableWidth) {
                        *availableWidth -= blockWidth;
                    }
                    // layoutText will always at least layout one character even if it doesn't fit in
                    // the given space which makes sense (except in the case of switching fonts, so we control if we ran out of space here manually)
                    // we also need to allow the character if we have not layouted anything yet because otherwise we will end up in an infinite loop
                    // because it is assumed we at least layout one character
                    if (!availableWidth || *availableWidth > 0 || (isUnicode && i == 2) || (!isUnicode && i == 0)) {
                        i += isUnicode ? 2 : 1;
                        data.emplace_back(outputText.toStr(), auxFontName, blockWidth, charCount);
                    }
                } else {
                    error(errSyntaxError, -1, "HorizontalTextLayouter, couldn't find a font for character U+{0:04uX}", uChar);
                    newFontNeeded = false;
                    i += isUnicode ? 2 : 1;
                }
            }
            // Now layout the rest of the text with the original font
            if (!availableWidth || *availableWidth > 0) {
                Annot::layoutText(text, &outputText, &i, font, &blockWidth, availableWidth ? *availableWidth : 0.0, &charCount, false, &newFontNeeded);
                if (availableWidth) {
                    *availableWidth -= blockWidth;
                }
                // layoutText will always at least layout one character even if it doesn't fit in
                // the given space which makes sense (except in the case of switching fonts, so we control if we ran out of space here manually)
                if (!availableWidth || *availableWidth > 0) {
                    data.emplace_back(outputText.toStr(), std::string(), blockWidth, charCount);
                } else {
                    i -= isUnicode ? 2 : 1;
                }
            }
        }
        consumedText = i;
    }

    HorizontalTextLayouter(const HorizontalTextLayouter &) = delete;
    HorizontalTextLayouter &operator=(const HorizontalTextLayouter &) = delete;

    double totalWidth() const
    {
        double totalWidth = 0;
        for (const Data &d : data) {
            totalWidth += d.width;
        }
        return totalWidth;
    }

    int totalCharCount() const
    {
        int total = 0;
        for (const Data &d : data) {
            total += d.charCount;
        }
        return total;
    }

    struct Data
    {
        Data(std::string t, std::string fName, double w, int cc) : text(std::move(t)), fontName(std::move(fName)), width(w), charCount(cc) { }

        const std::string text;
        const std::string fontName;
        const double width;
        const int charCount;
    };

    std::vector<Data> data;
    int consumedText;
};

double Annot::calculateFontSize(const Form *form, const GfxFont &font, const std::string &text, double wMax, double hMax, const bool forceZapfDingbats)
{
    const bool isUnicode = hasUnicodeByteOrderMark(text);
    double fontSize;

    for (fontSize = 20; fontSize > 1; --fontSize) {
        const double availableWidthInFontSize = wMax / fontSize;
        double y = hMax - 3;
        size_t i = 0;
        while (i < text.size()) {
            GooString lineText(text.substr(i));
            if (!hasUnicodeByteOrderMark(lineText.toStr()) && isUnicode) {
                prependUnicodeByteOrderMark(lineText.toNonConstStr());
            }
            const HorizontalTextLayouter textLayouter(lineText.toStr(), form, font, availableWidthInFontSize, forceZapfDingbats);
            y -= fontSize;
            if (i == 0) {
                i += textLayouter.consumedText;
            } else {
                i += textLayouter.consumedText - (isUnicode ? 2 : 0);
            }
        }
        // approximate the descender for the last line
        if (y >= 0.33 * fontSize) {
            break;
        }
    }
    return fontSize;
}

struct DrawMultiLineTextResult
{
    std::string text;
    int nLines = 0;
};

// if fontName is empty it is assumed it is sent from the outside
// so for text that is in font no Tf is added and for text that is in the aux fonts
// a pair of q/Q is added
static DrawMultiLineTextResult drawMultiLineText(const std::string &text, double availableWidth, const Form *form, const GfxFont &font, const std::string &fontName, double fontSize, VariableTextQuadding quadding, double borderWidth)
{
    DrawMultiLineTextResult result;
    size_t i = 0;
    double xPosPrev = 0;
    const double availableTextWidthInFontPtSize = availableWidth / fontSize;
    while (i < text.size()) {
        GooString lineText(text.substr(i));
        if (!hasUnicodeByteOrderMark(lineText.toStr()) && hasUnicodeByteOrderMark(text)) {
            prependUnicodeByteOrderMark(lineText.toNonConstStr());
        }
        const HorizontalTextLayouter textLayouter(lineText.toStr(), form, font, availableTextWidthInFontPtSize, false);

        const double totalWidth = textLayouter.totalWidth() * fontSize;

        auto calculateX = [quadding, availableWidth, totalWidth, borderWidth] {
            switch (quadding) {
            case VariableTextQuadding::centered:
                return (availableWidth - totalWidth) / 2;
                break;
            case VariableTextQuadding::rightJustified:
                return availableWidth - totalWidth - borderWidth;
                break;
            default: // VariableTextQuadding::lLeftJustified:
                return borderWidth;
                break;
            }
        };
        const double xPos = calculateX();

        AnnotAppearanceBuilder builder;
        bool first = true;
        double prevBlockWidth = 0;
        for (const HorizontalTextLayouter::Data &d : textLayouter.data) {
            const std::string &fName = d.fontName.empty() ? fontName : d.fontName;
            if (!fName.empty()) {
                if (fontName.empty()) {
                    builder.append(" q\n");
                }
                builder.appendf("/{0:s} {1:.2f} Tf\n", fName.c_str(), fontSize);
            }

            const double yDiff = first ? -fontSize : 0;
            const double xDiff = first ? xPos - xPosPrev : prevBlockWidth;

            builder.appendf("{0:.2f} {1:.2f} Td\n", xDiff, yDiff);
            builder.writeString(d.text);
            builder.append(" Tj\n");
            first = false;
            prevBlockWidth = d.width * fontSize;

            if (!fName.empty() && fontName.empty()) {
                builder.append(" Q\n");
            }
        }
        xPosPrev = xPos + totalWidth - prevBlockWidth;

        result.text += builder.buffer();
        result.nLines += 1;
        if (i == 0) {
            i += textLayouter.consumedText;
        } else {
            i += textLayouter.consumedText - (hasUnicodeByteOrderMark(text) ? 2 : 0);
        }
    }
    return result;
}

void AnnotFreeText::generateFreeTextAppearance()
{
    double borderWidth, ca = opacity;

    AnnotAppearanceBuilder appearBuilder;
    appearBuilder.append("q\n");

    borderWidth = border->getWidth();
    if (borderWidth > 0) {
        appearBuilder.setLineStyleForBorder(*border);
    }

    // Box size
    const double width = rect->x2 - rect->x1;
    const double height = rect->y2 - rect->y1;

    // Parse some properties from the appearance string
    DefaultAppearance da { appearanceString };

    // Default values
    if (da.getFontName().empty()) {
        da.setFontName("AnnotDrawFont");
    }
    if (da.getFontPtSize() <= 0) {
        da.setFontPtSize(undefinedFontPtSize);
    }
    if (!da.getFontColor()) {
        da.setFontColor(std::make_unique<AnnotColor>(0, 0, 0));
    }

    // Draw box
    bool doFill = (color && color->getSpace() != AnnotColor::colorTransparent);
    bool doStroke = (borderWidth != 0);
    if (doFill || doStroke) {
        if (doStroke) {
            appearBuilder.setDrawColor(*da.getFontColor(), false); // Border color: same as font color
        }
        appearBuilder.appendf("{0:.2f} {0:.2f} {1:.2f} {2:.2f} re\n", borderWidth / 2, width - borderWidth, height - borderWidth);
        if (doFill) {
            appearBuilder.setDrawColor(*color, true);
            appearBuilder.append(doStroke ? "B\n" : "f\n");
        } else {
            appearBuilder.append("S\n");
        }
    }

    // Setup text clipping
    const double textmargin = borderWidth * 2;
    const double textwidth = width - 2 * textmargin;
    appearBuilder.appendf("{0:.2f} {0:.2f} {1:.2f} {2:.2f} re W n\n", textmargin, textwidth, height - 2 * textmargin);

    std::unique_ptr<const GfxFont> font = nullptr;

    // look for font name in the default resources
    Form *form = doc->getCatalog()->getForm(); // form is owned by catalog, no need to clean it up

    Object resourceObj;
    if (form && form->getDefaultResourcesObj() && form->getDefaultResourcesObj()->isDict()) {
        resourceObj = form->getDefaultResourcesObj()->copy(); // No real copy, but increment refcount of /DR Dict

        Dict *resDict = resourceObj.getDict();
        Object fontResources = resDict->lookup("Font"); // The 'Font' subdictionary

        if (!fontResources.isDict()) {
            error(errSyntaxWarning, -1, "Font subdictionary is not a dictionary");
        } else {
            // Get the font dictionary for the actual requested font
            Ref fontReference;
            Object fontDictionary = fontResources.getDict()->lookup(da.getFontName(), &fontReference);

            if (fontDictionary.isDict()) {
                font = GfxFont::makeFont(doc->getXRef(), da.getFontName(), fontReference, *fontDictionary.getDict());
            } else {
                error(errSyntaxWarning, -1, "Font dictionary is not a dictionary");
            }
        }
    }

    // if fontname is not in the default resources, create a Helvetica fake font
    if (!font) {
        auto fontResDict = std::make_unique<Dict>(doc->getXRef());
        font = createAnnotDrawFont(doc->getXRef(), fontResDict.get(), da.getFontName());
        resourceObj = Object(std::move(fontResDict));
    }

    // Set font state
    appearBuilder.setDrawColor(*da.getFontColor(), true);
    appearBuilder.appendf("BT 1 0 0 1 {0:.2f} {1:.2f} Tm\n", textmargin, height - textmargin);
    const DrawMultiLineTextResult textCommands = drawMultiLineText(contents.toStr(), textwidth, form, *font, da.getFontName(), da.getFontPtSize(), quadding, 0 /*borderWidth*/);
    appearBuilder.append(textCommands.text.c_str());
    appearBuilder.append("ET Q\n");

    const std::array<double, 4> bbox = { 0, 0, rect->x2 - rect->x1, rect->y2 - rect->y1 };

    Object newAppearance;
    if (ca == 1) {
        newAppearance = createForm(appearBuilder.buffer(), bbox, false, std::move(resourceObj));
    } else {
        Object aStream = createForm(appearBuilder.buffer(), bbox, true, std::move(resourceObj));

        std::string appearBuf("/GS0 gs\n/Fm0 Do");
        std::unique_ptr<Dict> resDict = createResourcesDict("Fm0", std::move(aStream), "GS0", ca, nullptr);
        newAppearance = createForm(appearBuf, bbox, false, std::move(resDict));
    }
    if (hasBeenUpdated) {
        // We should technically do this for all annots but AnnotFreeText
        // is particularly special since we're potentially embeddeing a font so we really need
        // to set the AP and not let other renderers guess it from the contents
        setNewAppearance(std::move(newAppearance));
    } else {
        appearance = std::move(newAppearance);
    }
}

void AnnotFreeText::draw(Gfx *gfx, bool printing)
{
    if (!isVisible(printing)) {
        return;
    }

    annotLocker();
    if (appearance.isNull()) {
        generateFreeTextAppearance();
    }

    // draw the appearance stream
    Object obj = appearance.fetch(gfx->getXRef());
    gfx->drawAnnot(&obj, nullptr, color.get(), rect->x1, rect->y1, rect->x2, rect->y2, getRotation());
}

// Before retrieving the res dict, regenerate the appearance stream if needed,
// because AnnotFreeText::draw needs to store font info in the res dict
Object AnnotFreeText::getAppearanceResDict()
{
    if (appearance.isNull()) {
        generateFreeTextAppearance();
    }
    return Annot::getAppearanceResDict();
}

//------------------------------------------------------------------------
// AnnotLine
//------------------------------------------------------------------------

AnnotLine::AnnotLine(PDFDoc *docA, const PDFRectangle &rectA) : AnnotMarkup(docA, rectA)
{
    type = typeLine;
    annotObj.dictSet("Subtype", Object::name("Line"));

    initialize(annotObj.getDict());
}

AnnotLine::AnnotLine(PDFDoc *docA, Object &&dictObject, const Object &obj) : AnnotMarkup(docA, std::move(dictObject), obj)
{
    type = typeLine;
    initialize(annotObj.getDict());
}

AnnotLine::~AnnotLine() = default;

void AnnotLine::initialize(Dict *dict)
{
    Object obj1;

    obj1 = dict->lookup("L");
    if (obj1.isArrayOfLength(4)) {
        const double x1 = obj1.arrayGet(0).getNumWithDefaultValue(0);
        const double y1 = obj1.arrayGet(1).getNumWithDefaultValue(0);
        const double x2 = obj1.arrayGet(2).getNumWithDefaultValue(0);
        const double y2 = obj1.arrayGet(3).getNumWithDefaultValue(0);

        coord1 = std::make_unique<AnnotCoord>(x1, y1);
        coord2 = std::make_unique<AnnotCoord>(x2, y2);
    } else {
        coord1 = std::make_unique<AnnotCoord>();
        coord2 = std::make_unique<AnnotCoord>();
    }

    obj1 = dict->lookup("LE");
    if (obj1.isArrayOfLength(2)) {
        Object obj2;

        obj2 = obj1.arrayGet(0);
        if (obj2.isName()) {
            startStyle = parseAnnotLineEndingStyle(obj2);
        } else {
            startStyle = annotLineEndingNone;
        }

        obj2 = obj1.arrayGet(1);
        if (obj2.isName()) {
            endStyle = parseAnnotLineEndingStyle(obj2);
        } else {
            endStyle = annotLineEndingNone;
        }

    } else {
        startStyle = endStyle = annotLineEndingNone;
    }

    obj1 = dict->lookup("IC");
    if (obj1.isArray()) {
        interiorColor = std::make_unique<AnnotColor>(*obj1.getArray());
    }

    leaderLineLength = dict->lookup("LL").getNumWithDefaultValue(0);

    leaderLineExtension = dict->lookup("LLE").getNumWithDefaultValue(0);
    if (leaderLineExtension < 0) {
        leaderLineExtension = 0;
    }

    caption = dict->lookup("Cap").getBoolWithDefaultValue(false);

    obj1 = dict->lookup("IT");
    if (obj1.isName()) {
        const std::string &intentName = obj1.getNameString();

        if (intentName == "LineArrow") {
            intent = intentLineArrow;
        } else if (intentName == "LineDimension") {
            intent = intentLineDimension;
        } else {
            intent = intentLineArrow;
        }
    } else {
        intent = intentLineArrow;
    }

    leaderLineOffset = dict->lookup("LLO").getNumWithDefaultValue(0);
    if (leaderLineOffset < 0) {
        leaderLineOffset = 0;
    }

    obj1 = dict->lookup("CP");
    if (obj1.isName()) {
        const std::string &captionName = obj1.getNameString();

        if (captionName == "Inline") {
            captionPos = captionPosInline;
        } else if (captionName == "Top") {
            captionPos = captionPosTop;
        } else {
            captionPos = captionPosInline;
        }
    } else {
        captionPos = captionPosInline;
    }

    obj1 = dict->lookup("Measure");
    if (obj1.isDict()) {
        measure = nullptr;
    } else {
        measure = nullptr;
    }

    obj1 = dict->lookup("CO");
    if (obj1.isArrayOfLength(2)) {
        captionTextHorizontal = obj1.arrayGet(0).getNumWithDefaultValue(0);
        captionTextVertical = obj1.arrayGet(1).getNumWithDefaultValue(0);
    } else {
        captionTextHorizontal = captionTextVertical = 0;
    }

    obj1 = dict->lookup("BS");
    if (obj1.isDict()) {
        border = std::make_unique<AnnotBorderBS>(obj1.getDict());
    } else if (!border) {
        border = std::make_unique<AnnotBorderBS>();
    }
}

void AnnotLine::setContents(std::unique_ptr<GooString> &&new_content)
{
    Annot::setContents(std::move(new_content));
    if (caption) {
        invalidateAppearance();
    }
}

void AnnotLine::setVertices(double x1, double y1, double x2, double y2)
{
    coord1 = std::make_unique<AnnotCoord>(x1, y1);
    coord2 = std::make_unique<AnnotCoord>(x2, y2);

    auto lArray = std::make_unique<Array>(doc->getXRef());
    lArray->add(Object(x1));
    lArray->add(Object(y1));
    lArray->add(Object(x2));
    lArray->add(Object(y2));

    update("L", Object(std::move(lArray)));
    invalidateAppearance();
}

void AnnotLine::setStartEndStyle(AnnotLineEndingStyle start, AnnotLineEndingStyle end)
{
    startStyle = start;
    endStyle = end;

    auto leArray = std::make_unique<Array>(doc->getXRef());
    leArray->add(Object::name(convertAnnotLineEndingStyle(startStyle)));
    leArray->add(Object::name(convertAnnotLineEndingStyle(endStyle)));

    update("LE", Object(std::move(leArray)));
    invalidateAppearance();
}

void AnnotLine::setInteriorColor(std::unique_ptr<AnnotColor> &&new_color)
{
    if (new_color) {
        Object obj1 = new_color->writeToObject(doc->getXRef());
        update("IC", std::move(obj1));
        interiorColor = std::move(new_color);
    } else {
        interiorColor = nullptr;
    }
    invalidateAppearance();
}

void AnnotLine::setLeaderLineLength(double len)
{
    leaderLineLength = len;
    update("LL", Object(len));
    invalidateAppearance();
}

void AnnotLine::setLeaderLineExtension(double len)
{
    leaderLineExtension = len;
    update("LLE", Object(len));

    // LL is required if LLE is present
    update("LL", Object(leaderLineLength));
    invalidateAppearance();
}

void AnnotLine::setCaption(bool new_cap)
{
    caption = new_cap;
    update("Cap", Object(new_cap));
    invalidateAppearance();
}

void AnnotLine::setIntent(AnnotLineIntent new_intent)
{
    const char *intentName;

    intent = new_intent;
    if (new_intent == intentLineArrow) {
        intentName = "LineArrow";
    } else { // intentLineDimension
        intentName = "LineDimension";
    }
    update("IT", Object::name(intentName));
}

void AnnotLine::generateLineAppearance()
{
    double borderWidth, ca = opacity;
    bool fill = false;

    appearBBox = std::make_unique<AnnotAppearanceBBox>(*rect);
    AnnotAppearanceBuilder appearBuilder;
    appearBuilder.append("q\n");
    if (color) {
        appearBuilder.setDrawColor(*color, false);
    }
    if (interiorColor) {
        appearBuilder.setDrawColor(*interiorColor, true);
        fill = true;
    }
    appearBuilder.setLineStyleForBorder(*border);
    borderWidth = border->getWidth();
    appearBBox->setBorderWidth(std::max(1., borderWidth));

    const double x1 = coord1->getX();
    const double y1 = coord1->getY();
    const double x2 = coord2->getX();
    const double y2 = coord2->getY();

    // Main segment length
    const double main_len = sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));

    // Main segment becomes positive x direction, coord1 becomes (0,0)
    Matrix matr;
    const double angle = atan2(y2 - y1, x2 - x1);
    matr.m[0] = matr.m[3] = cos(angle);
    matr.m[1] = sin(angle);
    matr.m[2] = -matr.m[1];
    matr.m[4] = x1 - rect->x1;
    matr.m[5] = y1 - rect->y1;

    double tx, ty, captionwidth = 0, captionheight = 0;
    AnnotLineCaptionPos actualCaptionPos = captionPos;
    const double fontsize = 9;
    const double captionhmargin = 2; // Left and right margin (inline caption only)
    const double captionmaxwidth = main_len - 2 * captionhmargin;
    const double lineendingSize = std::min(6. * borderWidth, main_len / 2);

    std::unique_ptr<Dict> fontResDict;
    std::unique_ptr<const GfxFont> font;

    // Calculate caption width and height
    if (caption) {
        fontResDict = std::make_unique<Dict>(doc->getXRef());
        font = createAnnotDrawFont(doc->getXRef(), fontResDict.get());
        int lines = 0;
        size_t i = 0;
        while (i < contents.size()) {
            GooString out;
            double linewidth;
            layoutText(contents.toStr(), &out, &i, *font, &linewidth, 0, nullptr, false);
            linewidth *= fontsize;
            if (linewidth > captionwidth) {
                captionwidth = linewidth;
            }
            ++lines;
        }
        captionheight = lines * fontsize;
        // If text is longer than available space, turn into captionPosTop
        if (captionwidth > captionmaxwidth) {
            actualCaptionPos = captionPosTop;
        }
    } else {
        fontResDict = nullptr;
        font = nullptr;
    }

    // Draw main segment
    matr.transform(AnnotAppearanceBuilder::lineEndingXShorten(startStyle, lineendingSize), leaderLineLength, &tx, &ty);
    appearBuilder.appendf("{0:.2f} {1:.2f} m\n", tx, ty);
    appearBBox->extendTo(tx, ty);

    if (captionwidth != 0 && actualCaptionPos == captionPosInline) { // Break in the middle
        matr.transform((main_len - captionwidth) / 2 - captionhmargin, leaderLineLength, &tx, &ty);
        appearBuilder.appendf("{0:.2f} {1:.2f} l S\n", tx, ty);

        matr.transform((main_len + captionwidth) / 2 + captionhmargin, leaderLineLength, &tx, &ty);
        appearBuilder.appendf("{0:.2f} {1:.2f} m\n", tx, ty);
    }

    matr.transform(main_len - AnnotAppearanceBuilder::lineEndingXShorten(endStyle, lineendingSize), leaderLineLength, &tx, &ty);
    appearBuilder.appendf("{0:.2f} {1:.2f} l S\n", tx, ty);
    appearBBox->extendTo(tx, ty);

    if (startStyle != annotLineEndingNone) {
        const double extendX { -AnnotAppearanceBuilder::lineEndingXExtendBBox(startStyle, lineendingSize) };
        appearBuilder.drawLineEnding(startStyle, 0, leaderLineLength, -lineendingSize, fill, matr);
        matr.transform(extendX, leaderLineLength + lineendingSize / 2., &tx, &ty);
        appearBBox->extendTo(tx, ty);
        matr.transform(extendX, leaderLineLength - lineendingSize / 2., &tx, &ty);
        appearBBox->extendTo(tx, ty);
    }

    if (endStyle != annotLineEndingNone) {
        const double extendX { AnnotAppearanceBuilder::lineEndingXExtendBBox(endStyle, lineendingSize) };
        appearBuilder.drawLineEnding(endStyle, main_len, leaderLineLength, lineendingSize, fill, matr);
        matr.transform(main_len + extendX, leaderLineLength + lineendingSize / 2., &tx, &ty);
        appearBBox->extendTo(tx, ty);
        matr.transform(main_len + extendX, leaderLineLength - lineendingSize / 2., &tx, &ty);
        appearBBox->extendTo(tx, ty);
    }

    // Draw caption text
    if (caption) {
        double tlx = (main_len - captionwidth) / 2, tly; // Top-left coords
        if (actualCaptionPos == captionPosInline) {
            tly = leaderLineLength + captionheight / 2;
        } else {
            tly = leaderLineLength + captionheight + 2 * borderWidth;
        }

        tlx += captionTextHorizontal;
        tly += captionTextVertical;

        // Adjust bounding box
        matr.transform(tlx, tly - captionheight, &tx, &ty);
        appearBBox->extendTo(tx, ty);
        matr.transform(tlx + captionwidth, tly - captionheight, &tx, &ty);
        appearBBox->extendTo(tx, ty);
        matr.transform(tlx + captionwidth, tly, &tx, &ty);
        appearBBox->extendTo(tx, ty);
        matr.transform(tlx, tly, &tx, &ty);
        appearBBox->extendTo(tx, ty);

        // Setup text state (reusing transformed top-left coord)
        appearBuilder.appendf("0 g BT /AnnotDrawFont {0:.2f} Tf\n", fontsize); // Font color: black
        appearBuilder.appendf("{0:.2f} {1:.2f} {2:.2f} {3:.2f} {4:.2f} {5:.2f} Tm\n", matr.m[0], matr.m[1], matr.m[2], matr.m[3], tx, ty);
        appearBuilder.appendf("0 {0:.2f} Td\n", -fontsize * font->getDescent());
        // Draw text
        size_t i = 0;
        double xposPrev = 0;
        while (i < contents.size()) {
            GooString out;
            double linewidth, xpos;
            layoutText(contents.toStr(), &out, &i, *font, &linewidth, 0, nullptr, false);
            linewidth *= fontsize;
            xpos = (captionwidth - linewidth) / 2;
            appearBuilder.appendf("{0:.2f} {1:.2f} Td\n", xpos - xposPrev, -fontsize);
            appearBuilder.writeString(out.toStr());
            appearBuilder.append("Tj\n");
            xposPrev = xpos;
        }
        appearBuilder.append("ET\n");
    }

    // Draw leader lines
    double ll_len = fabs(leaderLineLength) + leaderLineExtension;
    double sign = leaderLineLength >= 0 ? 1 : -1;
    if (ll_len != 0) {
        matr.transform(0, 0, &tx, &ty);
        appearBuilder.appendf("{0:.2f} {1:.2f} m\n", tx, ty);
        appearBBox->extendTo(tx, ty);
        matr.transform(0, sign * ll_len, &tx, &ty);
        appearBuilder.appendf("{0:.2f} {1:.2f} l S\n", tx, ty);
        appearBBox->extendTo(tx, ty);

        matr.transform(main_len, 0, &tx, &ty);
        appearBuilder.appendf("{0:.2f} {1:.2f} m\n", tx, ty);
        appearBBox->extendTo(tx, ty);
        matr.transform(main_len, sign * ll_len, &tx, &ty);
        appearBuilder.appendf("{0:.2f} {1:.2f} l S\n", tx, ty);
        appearBBox->extendTo(tx, ty);
    }

    appearBuilder.append("Q\n");

    const std::array<double, 4> bbox = appearBBox->getBBoxRect();
    if (ca == 1) {
        appearance = createForm(appearBuilder.buffer(), bbox, false, std::move(fontResDict));
    } else {
        Object aStream = createForm(appearBuilder.buffer(), bbox, true, std::move(fontResDict));

        std::string appearBuf("/GS0 gs\n/Fm0 Do");
        std::unique_ptr<Dict> resDict = createResourcesDict("Fm0", std::move(aStream), "GS0", ca, nullptr);
        appearance = createForm(appearBuf, bbox, false, std::move(resDict));
    }
}

void AnnotLine::draw(Gfx *gfx, bool printing)
{
    if (!isVisible(printing)) {
        return;
    }

    annotLocker();
    if (appearance.isNull()) {
        generateLineAppearance();
    }

    // draw the appearance stream
    Object obj = appearance.fetch(gfx->getXRef());
    if (appearBBox) {
        gfx->drawAnnot(&obj, nullptr, color.get(), appearBBox->getPageXMin(), appearBBox->getPageYMin(), appearBBox->getPageXMax(), appearBBox->getPageYMax(), getRotation());
    } else {
        gfx->drawAnnot(&obj, nullptr, color.get(), rect->x1, rect->y1, rect->x2, rect->y2, getRotation());
    }
}

// Before retrieving the res dict, regenerate the appearance stream if needed,
// because AnnotLine::draw may need to store font info in the res dict
Object AnnotLine::getAppearanceResDict()
{
    if (appearance.isNull()) {
        generateLineAppearance();
    }
    return Annot::getAppearanceResDict();
}

//------------------------------------------------------------------------
// AnnotTextMarkup
//------------------------------------------------------------------------
AnnotTextMarkup::AnnotTextMarkup(PDFDoc *docA, const PDFRectangle &rectA, AnnotSubtype subType) : AnnotMarkup(docA, rectA)
{
    switch (subType) {
    case typeHighlight:
        annotObj.dictSet("Subtype", Object::name("Highlight"));
        break;
    case typeUnderline:
        annotObj.dictSet("Subtype", Object::name("Underline"));
        break;
    case typeSquiggly:
        annotObj.dictSet("Subtype", Object::name("Squiggly"));
        break;
    case typeStrikeOut:
        annotObj.dictSet("Subtype", Object::name("StrikeOut"));
        break;
    default:
        assert(0 && "Invalid subtype for AnnotTextMarkup\n");
    }

    // Store dummy quadrilateral with null coordinates
    auto quadPoints = std::make_unique<Array>(doc->getXRef());
    for (int i = 0; i < 4 * 2; ++i) {
        quadPoints->add(Object(0.));
    }
    annotObj.dictSet("QuadPoints", Object(std::move(quadPoints)));

    initialize(annotObj.getDict());
}

AnnotTextMarkup::AnnotTextMarkup(PDFDoc *docA, Object &&dictObject, const Object &obj) : AnnotMarkup(docA, std::move(dictObject), obj)
{
    // the real type will be read in initialize()
    type = typeHighlight;
    initialize(annotObj.getDict());
}

AnnotTextMarkup::~AnnotTextMarkup() = default;

void AnnotTextMarkup::initialize(Dict *dict)
{
    Object obj1;

    obj1 = dict->lookup("Subtype");
    if (obj1.isName()) {
        if (obj1.isName("Highlight")) {
            type = typeHighlight;
        } else if (obj1.isName("Underline")) {
            type = typeUnderline;
        } else if (obj1.isName("Squiggly")) {
            type = typeSquiggly;
        } else if (obj1.isName("StrikeOut")) {
            type = typeStrikeOut;
        }
    }

    obj1 = dict->lookup("QuadPoints");
    if (obj1.isArray()) {
        quadrilaterals = std::make_unique<AnnotQuadrilaterals>(*obj1.getArray());
    } else {
        error(errSyntaxError, -1, "Bad Annot Text Markup QuadPoints");
        ok = false;
    }
}

void AnnotTextMarkup::setType(AnnotSubtype new_type)
{
    const char *typeName = nullptr; /* squelch bogus compiler warning */

    switch (new_type) {
    case typeHighlight:
        typeName = "Highlight";
        break;
    case typeUnderline:
        typeName = "Underline";
        break;
    case typeSquiggly:
        typeName = "Squiggly";
        break;
    case typeStrikeOut:
        typeName = "StrikeOut";
        break;
    default:
        assert(!"Invalid subtype");
    }

    type = new_type;
    update("Subtype", Object::name(typeName));
    invalidateAppearance();
}

void AnnotTextMarkup::setQuadrilaterals(const AnnotQuadrilaterals &quadPoints)
{
    auto a = std::make_unique<Array>(doc->getXRef());

    for (int i = 0; i < quadPoints.getQuadrilateralsLength(); ++i) {
        a->add(Object(quadPoints.getX1(i)));
        a->add(Object(quadPoints.getY1(i)));
        a->add(Object(quadPoints.getX2(i)));
        a->add(Object(quadPoints.getY2(i)));
        a->add(Object(quadPoints.getX3(i)));
        a->add(Object(quadPoints.getY3(i)));
        a->add(Object(quadPoints.getX4(i)));
        a->add(Object(quadPoints.getY4(i)));
    }

    quadrilaterals = std::make_unique<AnnotQuadrilaterals>(*a);

    annotObj.dictSet("QuadPoints", Object(std::move(a)));
    invalidateAppearance();
}

bool AnnotTextMarkup::shouldCreateApperance(Gfx *gfx) const
{
    if (appearance.isNull()) {
        return true;
    }

    // Adobe Reader seems to have a complex condition for when to use the
    // appearance stream of typeHighlight, which is "use it if it has a Resources dictionary with ExtGState"
    // this is reverse engineering of me editing a file by hand and checking what it does so the real
    // condition may be more or less complex
    if (type == typeHighlight) {
        XRef *xref = gfx->getXRef();
        const Object fetchedApperance = appearance.fetch(xref);
        if (fetchedApperance.isStream()) {
            const Object resources = fetchedApperance.getStream()->getDict()->lookup("Resources");
            if (resources.isDict()) {
                if (resources.dictLookup("ExtGState").isDict()) {
                    return false;
                }
            }
        }
        return true;
    }

    return false;
}

void AnnotTextMarkup::draw(Gfx *gfx, bool printing)
{
    double ca = 1;
    int i;

    if (!isVisible(printing)) {
        return;
    }

    annotLocker();
    if (shouldCreateApperance(gfx)) {
        bool blendMultiply = true;
        ca = opacity;

        AnnotAppearanceBuilder appearBuilder;
        appearBuilder.append("q\n");

        /* Adjust BBox */
        appearBBox = std::make_unique<AnnotAppearanceBBox>(*rect);
        for (i = 0; i < quadrilaterals->getQuadrilateralsLength(); ++i) {
            appearBBox->extendTo(quadrilaterals->getX1(i) - rect->x1, quadrilaterals->getY1(i) - rect->y1);
            appearBBox->extendTo(quadrilaterals->getX2(i) - rect->x1, quadrilaterals->getY2(i) - rect->y1);
            appearBBox->extendTo(quadrilaterals->getX3(i) - rect->x1, quadrilaterals->getY3(i) - rect->y1);
            appearBBox->extendTo(quadrilaterals->getX4(i) - rect->x1, quadrilaterals->getY4(i) - rect->y1);
        }

        switch (type) {
        case typeUnderline:
            if (color) {
                appearBuilder.setDrawColor(*color, false);
            }
            appearBuilder.append("[] 0 d 1 w\n");
            // use a borderwidth, which is consistent with the line width
            appearBBox->setBorderWidth(1.0);

            for (i = 0; i < quadrilaterals->getQuadrilateralsLength(); ++i) {
                double x3, y3, x4, y4;

                x3 = quadrilaterals->getX3(i);
                y3 = quadrilaterals->getY3(i);
                x4 = quadrilaterals->getX4(i);
                y4 = quadrilaterals->getY4(i);

                appearBuilder.appendf("{0:.2f} {1:.2f} m\n", x3, y3);
                appearBuilder.appendf("{0:.2f} {1:.2f} l\n", x4, y4);
                appearBuilder.append("S\n");
            }
            break;
        case typeStrikeOut:
            if (color) {
                appearBuilder.setDrawColor(*color, false);
            }
            blendMultiply = false;
            appearBuilder.append("[] 0 d 1 w\n");

            for (i = 0; i < quadrilaterals->getQuadrilateralsLength(); ++i) {
                double x1, y1, x2, y2;
                double x3, y3, x4, y4;

                x1 = quadrilaterals->getX1(i);
                y1 = quadrilaterals->getY1(i);
                x2 = quadrilaterals->getX2(i);
                y2 = quadrilaterals->getY2(i);

                x3 = quadrilaterals->getX3(i);
                y3 = quadrilaterals->getY3(i);
                x4 = quadrilaterals->getX4(i);
                y4 = quadrilaterals->getY4(i);

                appearBuilder.appendf("{0:.2f} {1:.2f} m\n", (x1 + x3) / 2., (y1 + y3) / 2.);
                appearBuilder.appendf("{0:.2f} {1:.2f} l\n", (x2 + x4) / 2., (y2 + y4) / 2.);
                appearBuilder.append("S\n");
            }
            break;
        case typeSquiggly:
            if (color) {
                appearBuilder.setDrawColor(*color, false);
            }
            appearBuilder.append("[] 0 d 1 w\n");

            for (i = 0; i < quadrilaterals->getQuadrilateralsLength(); ++i) {
                double x1, y1, x2, y3;
                double h6;

                x1 = quadrilaterals->getX1(i);
                y1 = quadrilaterals->getY1(i);
                x2 = quadrilaterals->getX2(i);
                y3 = quadrilaterals->getY3(i);
                h6 = (y1 - y3) / 6.0;

                appearBuilder.appendf("{0:.2f} {1:.2f} m\n", x1, y3 + h6);
                bool down = false;
                do {
                    down = !down; // Zigzag line
                    x1 += 2;
                    appearBuilder.appendf("{0:.2f} {1:.2f} l\n", x1, y3 + (down ? 0 : h6));
                } while (x1 < x2);
                appearBuilder.append("S\n");
            }
            break;
        default:
        case typeHighlight:
            if (color) {
                appearBuilder.setDrawColor(*color, true);
            }

            double biggestBorder = 0;
            for (i = 0; i < quadrilaterals->getQuadrilateralsLength(); ++i) {
                double x1, y1, x2, y2, x3, y3, x4, y4;
                double h4;

                x1 = quadrilaterals->getX1(i);
                y1 = quadrilaterals->getY1(i);
                x2 = quadrilaterals->getX2(i);
                y2 = quadrilaterals->getY2(i);
                x3 = quadrilaterals->getX3(i);
                y3 = quadrilaterals->getY3(i);
                x4 = quadrilaterals->getX4(i);
                y4 = quadrilaterals->getY4(i);
                h4 = fabs(y1 - y3) / 4.0;

                if (h4 > biggestBorder) {
                    biggestBorder = h4;
                }

                appearBuilder.appendf("{0:.2f} {1:.2f} m\n", x3, y3);
                appearBuilder.appendf("{0:.2f} {1:.2f} {2:.2f} {3:.2f} {4:.2f} {5:.2f} c\n", x3 - h4, y3 + h4, x1 - h4, y1 - h4, x1, y1);
                appearBuilder.appendf("{0:.2f} {1:.2f} l\n", x2, y2);
                appearBuilder.appendf("{0:.2f} {1:.2f} {2:.2f} {3:.2f} {4:.2f} {5:.2f} c\n", x2 + h4, y2 - h4, x4 + h4, y4 + h4, x4, y4);
                appearBuilder.append("f\n");
            }
            appearBBox->setBorderWidth(biggestBorder);
            break;
        }
        appearBuilder.append("Q\n");

        const std::array<double, 4> bbox = { appearBBox->getPageXMin(), appearBBox->getPageYMin(), appearBBox->getPageXMax(), appearBBox->getPageYMax() };
        Object aStream = createForm(appearBuilder.buffer(), bbox, true, Object {});

        std::string appearBuf("/GS0 gs\n/Fm0 Do");
        std::unique_ptr<Dict> resDict = createResourcesDict("Fm0", std::move(aStream), "GS0", 1, blendMultiply ? "Multiply" : nullptr);
        if (ca == 1) {
            appearance = createForm(appearBuf, bbox, false, std::move(resDict));
        } else {
            aStream = createForm(appearBuf, bbox, true, std::move(resDict));

            std::unique_ptr<Dict> resDict2 = createResourcesDict("Fm0", std::move(aStream), "GS0", ca, nullptr);
            appearance = createForm(appearBuf, bbox, false, std::move(resDict2));
        }
    }

    // draw the appearance stream
    Object obj = appearance.fetch(gfx->getXRef());
    if (appearBBox) {
        gfx->drawAnnot(&obj, nullptr, color.get(), appearBBox->getPageXMin(), appearBBox->getPageYMin(), appearBBox->getPageXMax(), appearBBox->getPageYMax(), getRotation());
    } else {
        gfx->drawAnnot(&obj, nullptr, color.get(), rect->x1, rect->y1, rect->x2, rect->y2, getRotation());
    }
}

//------------------------------------------------------------------------
// AnnotWidget
//------------------------------------------------------------------------

AnnotWidget::AnnotWidget(PDFDoc *docA, Object &&dictObject, const Object &obj) : Annot(docA, std::move(dictObject), obj)
{
    type = typeWidget;
    field = nullptr;
    initialize(annotObj.getDict());
}

AnnotWidget::AnnotWidget(PDFDoc *docA, Object *dictObject, Object *obj, FormField *fieldA) : Annot(docA, dictObject->copy(), *obj)
{
    type = typeWidget;
    field = fieldA;
    initialize(dictObject->getDict());
}

AnnotWidget::~AnnotWidget() = default;

void AnnotWidget::initialize(Dict *dict)
{
    Object obj1;

    form = doc->getCatalog()->getForm();

    obj1 = dict->lookup("H");
    if (obj1.isName()) {
        const std::string &modeName = obj1.getNameString();

        if (modeName == "N") {
            mode = highlightModeNone;
        } else if (modeName == "O") {
            mode = highlightModeOutline;
        } else if ((modeName == "P") || (modeName == "T")) {
            mode = highlightModePush;
        } else {
            mode = highlightModeInvert;
        }
    } else {
        mode = highlightModeInvert;
    }

    obj1 = dict->lookup("MK");
    if (obj1.isDict()) {
        appearCharacs = std::make_unique<AnnotAppearanceCharacs>(obj1.getDict());
    }

    obj1 = dict->lookup("A");
    if (obj1.isDict()) {
        action = LinkAction::parseAction(&obj1, doc->getCatalog()->getBaseURI());
    }

    additionalActions = dict->lookupNF("AA").copy();

    obj1 = dict->lookup("Parent");
    if (obj1.isDict()) {
        parent = nullptr;
    } else {
        parent = nullptr;
    }

    obj1 = dict->lookup("BS");
    if (obj1.isDict()) {
        border = std::make_unique<AnnotBorderBS>(obj1.getDict());
    }

    updatedAppearanceStream = Ref::INVALID();
}

std::unique_ptr<LinkAction> AnnotWidget::getAdditionalAction(AdditionalActionsType additionalActionType)
{
    return ::getAdditionalAction(additionalActionType, &additionalActions, doc);
}

std::unique_ptr<LinkAction> AnnotWidget::getFormAdditionalAction(FormAdditionalActionsType formAdditionalActionType)
{
    Object additionalActionsObject = additionalActions.fetch(doc->getXRef());

    if (additionalActionsObject.isDict()) {
        const char *key = getFormAdditionalActionKey(formAdditionalActionType);

        Object actionObject = additionalActionsObject.dictLookup(key);
        if (actionObject.isDict()) {
            return LinkAction::parseAction(&actionObject, doc->getCatalog()->getBaseURI());
        }
    }

    return nullptr;
}

bool AnnotWidget::setFormAdditionalAction(FormAdditionalActionsType formAdditionalActionType, const std::string &js)
{
    Object additionalActionsObject = additionalActions.fetch(doc->getXRef());

    if (!additionalActionsObject.isDict()) {
        additionalActionsObject = Object(std::make_unique<Dict>(doc->getXRef()));
        annotObj.dictSet("AA", additionalActionsObject.copy());
    }

    additionalActionsObject.dictSet(getFormAdditionalActionKey(formAdditionalActionType), LinkJavaScript::createObject(doc->getXRef(), js));

    if (additionalActions.isRef()) {
        doc->getXRef()->setModifiedObject(&additionalActionsObject, additionalActions.getRef());
    } else if (hasRef) {
        doc->getXRef()->setModifiedObject(&annotObj, ref);
    } else {
        error(errInternal, -1, "AnnotWidget::setFormAdditionalAction, where neither additionalActions is ref nor annotobj itself is ref");
        return false;
    }
    return true;
}

// Grand unified handler for preparing text strings to be drawn into form
// fields.  Takes as input a text string (in PDFDocEncoding or UTF-16).
// Converts some or all of this string to the appropriate encoding for the
// specified font, and computes the width of the text.  Can optionally stop
// converting when a specified width has been reached, to perform line-breaking
// for multi-line fields.
//
// Parameters:
//   text: input text string to convert
//   outBuf: buffer for writing re-encoded string
//   i: index at which to start converting; will be updated to point just after
//      last character processed
//   font: the font which will be used for display
//   width: computed width (unscaled by font size) will be stored here
//   widthLimit: if non-zero, stop converting to keep width under this value
//      (should be scaled down by font size)
//   charCount: count of number of characters will be stored here
//   noReencode: if set, do not try to translate the character encoding
//      (useful for Zapf Dingbats or other unusual encodings)
//      can only be used with simple fonts, not CID-keyed fonts
//
// TODO: Handle surrogate pairs in UTF-16.
//       Should be able to generate output for any CID-keyed font.
//       Doesn't handle vertical fonts--should it?
void Annot::layoutText(const std::string &text, GooString *outBuf, size_t *i, const GfxFont &font, double *width, double widthLimit, int *charCount, bool noReencode, bool *newFontNeeded)
{
    CharCode c;
    Unicode uChar;
    const Unicode *uAux;
    double w = 0.0;
    int uLen, n;
    double dx, dy, ox, oy;

    if (newFontNeeded) {
        *newFontNeeded = false;
    }
    if (width != nullptr) {
        *width = 0.0;
    }
    if (charCount != nullptr) {
        *charCount = 0;
    }

    bool unicode = hasUnicodeByteOrderMark(text);
    bool spacePrev; // previous character was a space

    // State for backtracking when more text has been processed than fits within
    // widthLimit.  We track for both input (text) and output (outBuf) the offset
    // to the first character to discard.
    //
    // We keep track of several points:
    //   1 - end of previous completed word which fits
    //   2 - previous character which fit
    size_t last_i1, last_i2, last_o1, last_o2;

    if (unicode && text.size() % 2 != 0) {
        error(errSyntaxError, -1, "AnnotWidget::layoutText, bad unicode string");
        *i += 1;
        return;
    }

    // skip Unicode marker on string if needed
    if (unicode && *i == 0) {
        *i = 2;
    }

    // Start decoding and copying characters, until either:
    //   we reach the end of the string
    //   we reach the maximum width
    //   we reach a newline character
    // As we copy characters, keep track of the last full word to fit, so that we
    // can backtrack if we exceed the maximum width.
    last_i1 = last_i2 = *i;
    last_o1 = last_o2 = 0;
    spacePrev = false;
    outBuf->clear();

    while (*i < text.size()) {
        last_i2 = *i;
        last_o2 = outBuf->size();

        if (unicode) {
            uChar = static_cast<unsigned char>(text[*i]) << 8;
            uChar += static_cast<unsigned char>(text[*i + 1]);
            *i += 2;
        } else {
            if (noReencode) {
                uChar = text[*i] & 0xff;
            } else {
                uChar = pdfDocEncoding[text[*i] & 0xff];
            }
            *i += 1;
        }

        // Explicit line break?
        if (uChar == '\r' || uChar == '\n') {
            // Treat a <CR><LF> sequence as a single line break
            if (uChar == '\r' && *i < text.size()) {
                if (unicode && text[*i] == '\0' && text[*i + 1] == '\n') {
                    *i += 2;
                } else if (!unicode && text[*i] == '\n') {
                    *i += 1;
                }
            }

            break;
        }

        if (noReencode) {
            outBuf->push_back(uChar);
        } else {
            const CharCodeToUnicode *ccToUnicode = font.getToUnicode();
            if (!ccToUnicode) {
                // This assumes an identity CMap.
                outBuf->push_back((uChar >> 8) & 0xff);
                outBuf->push_back(uChar & 0xff);
            } else if (ccToUnicode->mapToCharCode(&uChar, &c, 1)) {
                if (font.isCIDFont()) {
                    const auto *cidFont = static_cast<const GfxCIDFont *>(&font);
                    if (c < cidFont->getCIDToGIDLen()) {
                        const int glyph = cidFont->getCIDToGID()[c];
                        if (glyph > 0 || c == 0) {
                            outBuf->push_back((c >> 8) & 0xff);
                            outBuf->push_back(c & 0xff);
                        } else {
                            if (newFontNeeded) {
                                *newFontNeeded = true;
                                *i -= unicode ? 2 : 1;
                                break;
                            }
                            outBuf->push_back((c >> 8) & 0xff);
                            outBuf->push_back(c & 0xff);
                            error(errSyntaxError, -1, "AnnotWidget::layoutText, font doesn't have glyph for charcode U+{0:04uX}", c);
                        }
                    } else {
                        // TODO: This assumes an identity CMap.  It should be extended to
                        // handle the general case.
                        outBuf->push_back((c >> 8) & 0xff);
                        outBuf->push_back(c & 0xff);
                    }
                } else {
                    // 8-bit font
                    outBuf->push_back(c);
                }
            } else {
                if (newFontNeeded) {
                    *newFontNeeded = true;
                    *i -= unicode ? 2 : 1;
                    break;
                }
                error(errSyntaxError, -1, "AnnotWidget::layoutText, cannot convert U+{0:04uX}", uChar);
            }
        }

        // If we see a space, then we have a linebreak opportunity.
        if (uChar == ' ') {
            last_i1 = *i;
            if (!spacePrev) {
                last_o1 = last_o2;
            }
            spacePrev = true;
        } else {
            spacePrev = false;
        }

        // Compute width of character just output
        if (outBuf->size() > last_o2) {
            dx = 0.0;
            font.getNextChar(outBuf->c_str() + last_o2, outBuf->size() - last_o2, &c, &uAux, &uLen, &dx, &dy, &ox, &oy);
            w += dx;
        }

        // Current line over-full now?
        if (widthLimit > 0.0 && w > widthLimit) {
            if (last_o1 > 0) {
                // Back up to the previous word which fit, if there was a previous
                // word.
                *i = last_i1;
                outBuf->erase(last_o1, outBuf->size() - last_o1);
            } else if (last_o2 > 0) {
                // Otherwise, back up to the previous character (in the only word on
                // this line)
                *i = last_i2;
                outBuf->erase(last_o2, outBuf->size() - last_o2);
            } else {
                // Otherwise, we were trying to fit the first character; include it
                // anyway even if it overflows the space--no updates to make.
            }
            break;
        }
    }

    // If splitting input into lines because we reached the width limit, then
    // consume any remaining trailing spaces that would go on this line from the
    // input.  If in doing so we reach a newline, consume that also.  This code
    // won't run if we stopped at a newline above, since in that case w <=
    // widthLimit still.
    if (widthLimit > 0.0 && w > widthLimit) {
        if (unicode) {
            while (*i < text.size() && text[*i] == '\0' && text[*i + 1] == ' ') {
                *i += 2;
            }
            if (*i < text.size() && text[*i] == '\0' && text[*i + 1] == '\r') {
                *i += 2;
            }
            if (*i < text.size() && text[*i] == '\0' && text[*i + 1] == '\n') {
                *i += 2;
            }
        } else {
            while (*i < text.size() && text[*i] == ' ') {
                *i += 1;
            }
            if (*i < text.size() && text[*i] == '\r') {
                *i += 1;
            }
            if (*i < text.size() && text[*i] == '\n') {
                *i += 1;
            }
        }
    }

    // Compute the actual width and character count of the final string, based on
    // breakpoint, if this information is requested by the caller.
    if (width != nullptr || charCount != nullptr) {
        const char *s = outBuf->c_str();
        int len = outBuf->size();

        while (len > 0) {
            dx = 0.0;
            n = font.getNextChar(s, len, &c, &uAux, &uLen, &dx, &dy, &ox, &oy);

            if (n == 0) {
                break;
            }

            if (width != nullptr) {
                *width += dx;
            }
            if (charCount != nullptr) {
                *charCount += 1;
            }

            s += n;
            len -= n;
        }
    }
}

// Copy the given string to appearBuf, adding parentheses around it and
// escaping characters as appropriate.
void AnnotAppearanceBuilder::writeString(const std::string &str)
{
    appearBuf.push_back('(');

    for (const char c : str) {
        if (c == '(' || c == ')' || c == '\\') {
            appearBuf.push_back('\\');
            appearBuf.push_back(c);
        } else if (c < 0x20) {
            GooString::appendf(appearBuf, "\\{0:03o}", static_cast<unsigned char>(c));
        } else {
            appearBuf.push_back(c);
        }
    }

    appearBuf.push_back(')');
}

// Draw the variable text or caption for a field.
bool AnnotAppearanceBuilder::drawText(const std::string &inputText, const Form *form, const std::string &inputDA, const GfxResources *resources, const AnnotBorder *border, const AnnotAppearanceCharacs *appearCharacs,
                                      const PDFRectangle &rect, const VariableTextQuadding quadding, XRef &xref, Dict &resourcesDict, const int flags, const int nCombs)
{
    const bool forceZapfDingbats = flags & ForceZapfDingbatsDrawTextFlag;

    std::vector<std::string> daToks;
    const GfxFont *font;
    double fontSize;
    int tfPos, tmPos;
    std::unique_ptr<std::string> textToFree;
    std::unique_ptr<const GfxFont> fontToFree = nullptr;

    //~ if there is no MK entry, this should use the existing content stream,
    //~ and only replace the marked content portion of it
    //~ (this is only relevant for Tx fields)

    // Checkbox fields may come without a DA entry, spec requires it
    // for all fields containing variable text but it seems Checkbox
    // fields are de-facto not considered as such - Issue #1055
    static const std::string daStackString("/ZaDb 0 Tf 0 g");
    const std::string &daToUse = inputDA.empty() && forceZapfDingbats ? daStackString : inputDA;

    // parse the default appearance string
    tfPos = tmPos = -1;
    FormFieldText::tokenizeDA(daToUse, &daToks, nullptr /*searchTok*/);
    for (size_t i = 2; i < daToks.size(); ++i) {
        if (i >= 2 && daToks[i] == "Tf") {
            tfPos = i - 2;
        } else if (i >= 6 && daToks[i] == "Tm") {
            tmPos = i - 6;
        }
    }

    // get the font and font size
    font = nullptr;
    fontSize = 0;
    if (tfPos >= 0) {
        std::string &tok = daToks[tfPos];
        if (forceZapfDingbats) {
            if (tok != "/ZaDb") {
                tok = "/ZaDb";
            }
        }
        if (!tok.empty() && tok[0] == '/') {
            const auto fontName = std::string_view(tok).substr(1);
            if (!resources || !(font = resources->lookupFont(fontName).get())) {
                const char *fallback = determineFallbackFont(tok, forceZapfDingbats ? "ZapfDingbats" : "Helvetica");
                // The font variable sometimes points to an object that needs to be deleted
                // and sometimes not, depending on whether the call to lookupFont above fails.
                // When the code path right here is taken, the destructor of fontToFree
                // (which is a std::unique_ptr) will delete the font object at the end of this method.
                fontToFree = createAnnotDrawFont(&xref, &resourcesDict, fontName, fallback);
                font = fontToFree.get();
                if (font && forceZapfDingbats) {
                    addedDingbatsResource = true;
                }
            }
        } else {
            error(errSyntaxError, -1, "Invalid font name in 'Tf' operator in field's DA string");
        }
        fontSize = gatof(daToks[tfPos + 1].c_str());
    } else {
        error(errSyntaxError, -1, "Missing 'Tf' operator in field's DA string");
    }
    if (!font) {
        return false;
    }

    if (tmPos < 0) {
        // Add fake Tm to the DA tokens
        tmPos = daToks.size();
        daToks.insert(daToks.end(), { "1", "0", "0", "1", "0", "0", "Tm" });
    }

    // get the border width
    const double borderWidth = border ? border->getWidth() : 0;

    // for a password field, replace all characters with asterisks
    if (flags & TurnTextToStarsDrawTextFlag) {
        int len;
        if (hasUnicodeByteOrderMark(inputText)) {
            len = (inputText.size() - 2) / 2;
        } else {
            len = inputText.size();
        }

        textToFree = std::make_unique<std::string>();
        for (int i = 0; i < len; ++i) {
            textToFree->push_back('*');
        }
    }
    const std::string &textToDraw = textToFree ? *textToFree : inputText;

    // setup
    if (flags & EmitMarkedContentDrawTextFlag) {
        appearBuf.append("/Tx BMC\n");
    }
    appearBuf.append("q\n");
    auto calculateDxDy = [this, appearCharacs, &rect]() -> std::tuple<double, double> {
        const int rot = appearCharacs ? appearCharacs->getRotation() : 0;
        switch (rot) {
        case 90:
            GooString::appendf(appearBuf, "0 1 -1 0 {0:.2f} 0 cm\n", rect.x2 - rect.x1);
            return { rect.y2 - rect.y1, rect.x2 - rect.x1 };

        case 180:
            GooString::appendf(appearBuf, "-1 0 0 -1 {0:.2f} {1:.2f} cm\n", rect.x2 - rect.x1, rect.y2 - rect.y1);
            return { rect.x2 - rect.y2, rect.y2 - rect.y1 };

        case 270:
            GooString::appendf(appearBuf, "0 -1 1 0 0 {0:.2f} cm\n", rect.y2 - rect.y1);
            return { rect.y2 - rect.y1, rect.x2 - rect.x1 };

        default: // assume rot == 0
            return { rect.x2 - rect.x1, rect.y2 - rect.y1 };
        }
    };
    const auto dxdy = calculateDxDy();
    const double dx = std::get<0>(dxdy);
    const double dy = std::get<1>(dxdy);
    appearBuf.append("BT\n");
    // multi-line text
    if (flags & MultilineDrawTextFlag) {
        // note: comb is ignored in multiline mode as mentioned in the spec

        const double wMax = dx - 2 * borderWidth - 4;

        // compute font autosize
        if (fontSize == 0) {
            fontSize = Annot::calculateFontSize(form, *font, textToDraw, wMax, dy, forceZapfDingbats);
            daToks[tfPos + 1] = GooString::format("{0:.2f}", fontSize);
        }

        // starting y coordinate
        // (note: each line of text starts with a Td operator that moves
        // down a line)
        const double y = dy - 3;

        // set the font matrix
        daToks[tmPos + 4] = "0";
        daToks[tmPos + 5] = GooString::format("{0:.2f}", y);

        // write the DA string
        for (const std::string &daTok : daToks) {
            appearBuf.append(daTok);
            appearBuf.push_back(' ');
        }

        const DrawMultiLineTextResult textCommands = drawMultiLineText(textToDraw, dx, form, *font, std::string(), fontSize, quadding, borderWidth + 2);
        appearBuf.append(textCommands.text);

        // single-line text
    } else {
        //~ replace newlines with spaces? - what does Acrobat do?

        // comb formatting
        if (nCombs > 0) {
            // compute comb spacing
            const double w = (dx - 2 * borderWidth) / nCombs;

            // compute font autosize
            if (fontSize == 0) {
                fontSize = dy - 2 * borderWidth;
                if (w < fontSize) {
                    fontSize = w;
                }
                fontSize = floor(fontSize);
                daToks[tfPos + 1] = GooString::format("{0:.2f}", fontSize);
            }

            const HorizontalTextLayouter textLayouter(textToDraw, form, *font, {}, forceZapfDingbats);

            const int charCount = std::min(textLayouter.totalCharCount(), nCombs);

            // compute starting text cell
            auto calculateX = [quadding, borderWidth, nCombs, charCount, w] {
                switch (quadding) {
                case VariableTextQuadding::leftJustified:
                default:
                    return borderWidth;
                case VariableTextQuadding::centered:
                    return borderWidth + (nCombs - charCount) / 2.0 * w;
                case VariableTextQuadding::rightJustified:
                    return borderWidth + (nCombs - charCount) * w;
                }
            };
            const double x = calculateX();
            const double y = 0.5 * dy - 0.4 * fontSize;

            // set the font matrix
            daToks[tmPos + 4] = GooString::format("{0:.2f}", x);
            daToks[tmPos + 5] = GooString::format("{0:.2f}", y);

            // write the DA string
            for (const std::string &daTok : daToks) {
                appearBuf.append(daTok);
                appearBuf.push_back(' ');
            }

            // write the text string
            int i = 0;
            double xPrev = w; // so that first character is placed properly
            for (const HorizontalTextLayouter::Data &d : textLayouter.data) {
                const char *s = d.text.c_str();
                int len = d.text.size();
                while (i < nCombs && len > 0) {
                    CharCode code;
                    const Unicode *uAux;
                    int uLen, n;
                    double char_dx, char_dy, ox, oy;

                    const GfxFont *currentFont = font;
                    if (!d.fontName.empty()) {
                        appearBuf.append(" q\n");
                        GooString::appendf(appearBuf, "/{0:s} {1:.2f} Tf\n", d.fontName.c_str(), fontSize);
                        currentFont = form->getDefaultResources()->lookupFont(d.fontName).get();
                    }

                    char_dx = 0.0;
                    n = currentFont->getNextChar(s, len, &code, &uAux, &uLen, &char_dx, &char_dy, &ox, &oy);
                    char_dx *= fontSize;

                    // center each character within its cell, by advancing the text
                    // position the appropriate amount relative to the start of the
                    // previous character
                    const double combX = 0.5 * (w - char_dx);
                    GooString::appendf(appearBuf, "{0:.2f} 0 Td\n", combX - xPrev + w);

                    GooString charBuf(s, n);
                    writeString(charBuf.toStr());
                    appearBuf.append(" Tj\n");

                    if (!d.fontName.empty()) {
                        appearBuf.append(" Q\n");
                    }

                    i++;
                    s += n;
                    len -= n;
                    xPrev = combX;
                }
            }

            // regular (non-comb) formatting
        } else {
            const HorizontalTextLayouter textLayouter(textToDraw, form, *font, {}, forceZapfDingbats);

            const double usedWidthUnscaled = textLayouter.totalWidth();

            // compute font autosize
            if (fontSize == 0) {
                fontSize = dy - 2 * borderWidth;
                if (usedWidthUnscaled > 0) {
                    const double fontSize2 = (dx - 4 - 2 * borderWidth) / usedWidthUnscaled;
                    if (fontSize2 < fontSize) {
                        fontSize = fontSize2;
                    }
                }
                fontSize = floor(fontSize);
                daToks[tfPos + 1] = GooString::format("{0:.2f}", fontSize);
            }

            // compute text start position
            const double usedWidth = usedWidthUnscaled * fontSize;
            auto calculateX = [quadding, borderWidth, dx, usedWidth] {
                switch (quadding) {
                case VariableTextQuadding::leftJustified:
                default:
                    return borderWidth + 2;
                case VariableTextQuadding::centered:
                    return (dx - usedWidth) / 2;
                case VariableTextQuadding::rightJustified:
                    return dx - borderWidth - 2 - usedWidth;
                }
            };
            const double x = calculateX();
            const double y = 0.5 * dy - 0.4 * fontSize;

            // set the font matrix
            daToks[tmPos + 4] = GooString::format("{0:.2f}", x);
            daToks[tmPos + 5] = GooString::format("{0:.2f}", y);

            // write the DA string
            for (const std::string &daTok : daToks) {
                appearBuf.append(daTok);
                appearBuf.push_back(' ');
            }
            // This newline is not neeed at all but it makes for easier reading
            // and our auto tests "wrongly" assume it will be there, so add it anyway
            appearBuf.append("\n");

            // write the text strings
            for (const HorizontalTextLayouter::Data &d : textLayouter.data) {
                if (!d.fontName.empty()) {
                    appearBuf.append(" q\n");
                    GooString::appendf(appearBuf, "/{0:s} {1:.2f} Tf\n", d.fontName.c_str(), fontSize);
                }
                writeString(d.text);
                appearBuf.append(" Tj\n");
                if (!d.fontName.empty()) {
                    appearBuf.append(" Q\n");
                }
            }
        }
    }
    // cleanup
    appearBuf.append("ET\n");
    appearBuf.append("Q\n");
    if (flags & EmitMarkedContentDrawTextFlag) {
        appearBuf.append("EMC\n");
    }

    return true;
}

// Draw the variable text or caption for a field.
bool AnnotAppearanceBuilder::drawListBox(const FormFieldChoice &fieldChoice, const AnnotBorder *border, const PDFRectangle &rect, const std::string &da, const GfxResources *resources, VariableTextQuadding quadding, XRef *xref,
                                         Dict *resourcesDict)
{
    std::vector<std::string> daToks;
    GooString convertedText;
    const GfxFont *font;
    double fontSize, borderWidth, x, y;
    int tfPos, tmPos;
    std::unique_ptr<const GfxFont> fontToFree;

    //~ if there is no MK entry, this should use the existing content stream,
    //~ and only replace the marked content portion of it
    //~ (this is only relevant for Tx fields)

    // parse the default appearance string
    tfPos = tmPos = -1;
    FormFieldText::tokenizeDA(da, &daToks, nullptr /*searchTok*/);
    for (std::size_t k = 2; k < daToks.size(); ++k) {
        if (k >= 2 && (daToks[k] == "Tf")) {
            tfPos = k - 2;
        } else if (k >= 6 && (daToks[k] == "Tm")) {
            tmPos = k - 6;
        }
    }

    // get the font and font size
    font = nullptr;
    fontSize = 0;
    if (tfPos >= 0) {
        const std::string &tok = daToks[tfPos];
        if (!tok.empty() && tok[0] == '/') {
            const auto fontName = std::string_view(tok).substr(1);
            if (!resources || !(font = resources->lookupFont(fontName).get())) {
                if (xref != nullptr && resourcesDict != nullptr) {
                    const char *fallback = determineFallbackFont(tok, "Helvetica");
                    // The font variable sometimes points to an object that needs to be deleted
                    // and sometimes not, depending on whether the call to lookupFont above fails.
                    // When the code path right here is taken, the destructor of fontToFree
                    // (which is a std::unique_ptr) will delete the font object at the end of this method.
                    fontToFree = createAnnotDrawFont(xref, resourcesDict, fontName, fallback);
                    font = fontToFree.get();
                } else {
                    error(errSyntaxError, -1, "Unknown font in field's DA string");
                }
            }
        } else {
            error(errSyntaxError, -1, "Invalid font name in 'Tf' operator in field's DA string");
        }
        fontSize = gatof(daToks[tfPos + 1].c_str());
    } else {
        error(errSyntaxError, -1, "Missing 'Tf' operator in field's DA string");
    }
    if (!font) {
        return false;
    }

    // get the border width
    borderWidth = border ? border->getWidth() : 0;

    const std::vector<FormFieldChoiceOption> &choices = fieldChoice.getChoices();

    // compute font autosize
    if (fontSize == 0) {
        double wMax = 0;
        for (const FormFieldChoiceOption &choice : choices) {
            if (!choice.optionName) {
                error(errSyntaxError, -1, "Invalid annotation listbox");
                return false;
            }
            size_t j = 0;
            double w;
            Annot::layoutText(choice.optionName->toStr(), &convertedText, &j, *font, &w, 0.0, nullptr, false);
            if (w > wMax) {
                wMax = w;
            }
        }
        fontSize = rect.y2 - rect.y1 - 2 * borderWidth;
        const double fontSize2 = (rect.x2 - rect.x1 - 4 - 2 * borderWidth) / wMax;
        if (fontSize2 < fontSize) {
            fontSize = fontSize2;
        }
        fontSize = floor(fontSize);
        if (tfPos >= 0) {
            std::string &tok = daToks[tfPos + 1];
            tok.clear();
            GooString::appendf(tok, "{0:.2f}", fontSize);
        }
    }
    // draw the text
    y = rect.y2 - rect.y1 - 1.1 * fontSize;
    for (size_t i = fieldChoice.getTopIndex(); i < choices.size(); ++i) {
        // setup
        appearBuf.append("q\n");

        // draw the background if selected
        if (choices[i].selected) {
            appearBuf.append("0 g f\n");
            GooString::appendf(appearBuf, "{0:.2f} {1:.2f} {2:.2f} {3:.2f} re f\n", borderWidth, y - 0.2 * fontSize, rect.x2 - rect.x1 - 2 * borderWidth, 1.1 * fontSize);
        }

        // setup
        appearBuf.append("BT\n");

        // compute text width and start position
        size_t j = 0;
        double w = 0.0;
        if (choices[i].optionName) {
            Annot::layoutText(choices[i].optionName->toStr(), &convertedText, &j, *font, &w, 0.0, nullptr, false);
        }
        w *= fontSize;
        switch (quadding) {
        case VariableTextQuadding::leftJustified:
        default:
            x = borderWidth + 2;
            break;
        case VariableTextQuadding::centered:
            x = (rect.x2 - rect.x1 - w) / 2;
            break;
        case VariableTextQuadding::rightJustified:
            x = rect.x2 - rect.x1 - borderWidth - 2 - w;
            break;
        }

        // set the font matrix
        if (tmPos >= 0) {
            {
                std::string &tok = daToks[tmPos + 4];
                tok.clear();
                GooString::appendf(tok, "{0:.2f}", x);
            }
            {
                std::string &tok = daToks[tmPos + 5];
                tok.clear();
                GooString::appendf(tok, "{0:.2f}", y);
            }
        }

        // write the DA string
        for (const std::string &daTok : daToks) {
            appearBuf.append(daTok);
            appearBuf.push_back(' ');
        }

        // write the font matrix (if not part of the DA string)
        if (tmPos < 0) {
            GooString::appendf(appearBuf, "1 0 0 1 {0:.2f} {1:.2f} Tm\n", x, y);
        }

        // change the text color if selected
        if (choices[i].selected) {
            appearBuf.append("1 g\n");
        }

        // write the text string
        writeString(convertedText.toStr());
        appearBuf.append(" Tj\n");

        // cleanup
        appearBuf.append("ET\n");
        appearBuf.append("Q\n");

        // next line
        y -= 1.1 * fontSize;
    }

    return true;
}

void AnnotAppearanceBuilder::drawFieldBorder(const FormField &field, const AnnotBorder &border, const AnnotAppearanceCharacs &appearCharacs, const PDFRectangle &rect)
{
    AnnotColor adjustedColor;
    const double w = border.getWidth();

    const AnnotColor *aColor = appearCharacs.getBorderColor();
    if (!aColor) {
        aColor = appearCharacs.getBackColor();
    }
    if (!aColor) {
        return;
    }

    const double dx = rect.x2 - rect.x1;
    const double dy = rect.y2 - rect.y1;

    // radio buttons with no caption have a round border
    const bool hasCaption = appearCharacs.getNormalCaption() != nullptr;
    if (field.getType() == formButton && static_cast<const FormFieldButton &>(field).getButtonType() == formButtonRadio && !hasCaption) {
        double r = 0.5 * (dx < dy ? dx : dy);
        switch (border.getStyle()) {
        case AnnotBorder::borderDashed:
            appearBuf.append("[");
            for (double dash : border.getDash()) {
                GooString::appendf(appearBuf, " {0:.2f}", dash);
            }
            appearBuf.append("] 0 d\n");
            // fallthrough
        case AnnotBorder::borderSolid:
        case AnnotBorder::borderUnderlined:
            GooString::appendf(appearBuf, "{0:.2f} w\n", w);
            setDrawColor(*aColor, false);
            drawCircle(0.5 * dx, 0.5 * dy, r - 0.5 * w, false);
            break;
        case AnnotBorder::borderBeveled:
        case AnnotBorder::borderInset:
            GooString::appendf(appearBuf, "{0:.2f} w\n", 0.5 * w);
            setDrawColor(*aColor, false);
            drawCircle(0.5 * dx, 0.5 * dy, r - 0.25 * w, false);
            adjustedColor = AnnotColor(*aColor);
            adjustedColor.adjustColor(border.getStyle() == AnnotBorder::borderBeveled ? 1 : -1);
            setDrawColor(adjustedColor, false);
            drawCircleTopLeft(0.5 * dx, 0.5 * dy, r - 0.75 * w);
            adjustedColor = AnnotColor(*aColor);
            adjustedColor.adjustColor(border.getStyle() == AnnotBorder::borderBeveled ? -1 : 1);
            setDrawColor(adjustedColor, false);
            drawCircleBottomRight(0.5 * dx, 0.5 * dy, r - 0.75 * w);
            break;
        }
    } else {
        switch (border.getStyle()) {
        case AnnotBorder::borderDashed:
            appearBuf.append("[");
            for (double dash : border.getDash()) {
                GooString::appendf(appearBuf, " {0:.2f}", dash);
            }
            appearBuf.append("] 0 d\n");
            // fallthrough
        case AnnotBorder::borderSolid:
            GooString::appendf(appearBuf, "{0:.2f} w\n", w);
            setDrawColor(*aColor, false);
            GooString::appendf(appearBuf, "{0:.2f} {0:.2f} {1:.2f} {2:.2f} re s\n", 0.5 * w, dx - w, dy - w);
            break;
        case AnnotBorder::borderBeveled:
        case AnnotBorder::borderInset:
            adjustedColor = AnnotColor(*aColor);
            adjustedColor.adjustColor(border.getStyle() == AnnotBorder::borderBeveled ? 1 : -1);
            setDrawColor(adjustedColor, true);
            appearBuf.append("0 0 m\n");
            GooString::appendf(appearBuf, "0 {0:.2f} l\n", dy);
            GooString::appendf(appearBuf, "{0:.2f} {1:.2f} l\n", dx, dy);
            GooString::appendf(appearBuf, "{0:.2f} {1:.2f} l\n", dx - w, dy - w);
            GooString::appendf(appearBuf, "{0:.2f} {1:.2f} l\n", w, dy - w);
            GooString::appendf(appearBuf, "{0:.2f} {0:.2f} l\n", w);
            appearBuf.append("f\n");
            adjustedColor = AnnotColor(*aColor);
            adjustedColor.adjustColor(border.getStyle() == AnnotBorder::borderBeveled ? -1 : 1);
            setDrawColor(adjustedColor, true);
            appearBuf.append("0 0 m\n");
            GooString::appendf(appearBuf, "{0:.2f} 0 l\n", dx);
            GooString::appendf(appearBuf, "{0:.2f} {1:.2f} l\n", dx, dy);
            GooString::appendf(appearBuf, "{0:.2f} {1:.2f} l\n", dx - w, dy - w);
            GooString::appendf(appearBuf, "{0:.2f} {1:.2f} l\n", dx - w, w);
            GooString::appendf(appearBuf, "{0:.2f} {0:.2f} l\n", w);
            appearBuf.append("f\n");
            break;
        case AnnotBorder::borderUnderlined:
            GooString::appendf(appearBuf, "{0:.2f} w\n", w);
            setDrawColor(*aColor, false);
            GooString::appendf(appearBuf, "0 0 m {0:.2f} 0 l s\n", dx);
            break;
        }

        // clip to the inside of the border
        GooString::appendf(appearBuf, "{0:.2f} {0:.2f} {1:.2f} {2:.2f} re W n\n", w, dx - 2 * w, dy - 2 * w);
    }
}

bool AnnotAppearanceBuilder::drawFormField(const FormField &field, const Form *form, const GfxResources *resources, const std::string &da, const AnnotBorder *border, const AnnotAppearanceCharacs *appearCharacs, const PDFRectangle &rect,
                                           const std::optional<std::string> &appearState, XRef &xref, Dict &resourcesDict)
{
    // draw the field contents
    switch (field.getType()) {
    case formButton:
        return drawFormFieldButton(static_cast<const FormFieldButton &>(field), form, resources, da, border, appearCharacs, rect, appearState, xref, resourcesDict);
        break;
    case formText:
        return drawFormFieldText(static_cast<const FormFieldText &>(field), form, resources, da, border, appearCharacs, rect, xref, resourcesDict);
    case formChoice:
        return drawFormFieldChoice(static_cast<const FormFieldChoice &>(field), form, resources, da, border, appearCharacs, rect, xref, resourcesDict);
        break;
    case formSignature:
        return drawSignatureFieldText(static_cast<const FormFieldSignature &>(field), form, da, border, rect, xref, resourcesDict);
        break;
    case formUndef:
    default:
        error(errSyntaxError, -1, "Unknown field type");
    }

    return false;
}

bool AnnotAppearanceBuilder::drawFormFieldButton(const FormFieldButton &field, const Form *form, const GfxResources *resources, const std::string &da, const AnnotBorder *border, const AnnotAppearanceCharacs *appearCharacs,
                                                 const PDFRectangle &rect, const std::optional<std::string> &appearState, XRef &xref, Dict &resourcesDict)
{
    const GooString *caption = nullptr;
    if (appearCharacs) {
        caption = appearCharacs->getNormalCaption();
    }

    switch (field.getButtonType()) {
    case formButtonRadio: {
        //~ Acrobat doesn't draw a caption if there is no AP dict (?)
        if (appearState && appearState != "Off" && field.getState(appearState.value())) {
            if (caption) {
                return drawText(caption->toStr(), form, da, resources, border, appearCharacs, rect, VariableTextQuadding::centered, xref, resourcesDict, ForceZapfDingbatsDrawTextFlag);
            }
            if (appearCharacs) {
                const AnnotColor *aColor = appearCharacs->getBorderColor();
                if (aColor) {
                    const double dx = rect.x2 - rect.x1;
                    const double dy = rect.y2 - rect.y1;
                    setDrawColor(*aColor, true);
                    drawCircle(0.5 * dx, 0.5 * dy, 0.2 * (dx < dy ? dx : dy), true);
                }
                return true;
            }
        }
    } break;
    case formButtonPush:
        if (caption) {
            return drawText(caption->toStr(), form, da, resources, border, appearCharacs, rect, VariableTextQuadding::centered, xref, resourcesDict);
        }
        break;
    case formButtonCheck:
        if (appearState && appearState->compare("Off") != 0) {
            if (!caption) {
                std::string checkMark("3");
                return drawText(checkMark, form, da, resources, border, appearCharacs, rect, VariableTextQuadding::centered, xref, resourcesDict, ForceZapfDingbatsDrawTextFlag);
            }
            return drawText(caption->toStr(), form, da, resources, border, appearCharacs, rect, VariableTextQuadding::centered, xref, resourcesDict, ForceZapfDingbatsDrawTextFlag);
        }
        break;
    }

    return true;
}

bool AnnotAppearanceBuilder::drawFormFieldText(const FormFieldText &fieldText, const Form *form, const GfxResources *resources, const std::string &da, const AnnotBorder *border, const AnnotAppearanceCharacs *appearCharacs,
                                               const PDFRectangle &rect, XRef &xref, Dict &resourcesDict)
{
    VariableTextQuadding quadding;
    const GooString *contents;

    contents = fieldText.getAppearanceContent();
    if (contents) {
        if (fieldText.hasTextQuadding()) {
            quadding = fieldText.getTextQuadding();
        } else if (form) {
            quadding = form->getTextQuadding();
        } else {
            quadding = VariableTextQuadding::leftJustified;
        }

        const int nCombs = fieldText.isComb() ? fieldText.getMaxLen() : 0;

        int flags = EmitMarkedContentDrawTextFlag;
        if (fieldText.isMultiline()) {
            flags = flags | MultilineDrawTextFlag;
        }
        if (fieldText.isPassword()) {
            flags = flags | TurnTextToStarsDrawTextFlag;
        }
        return drawText(contents->toStr(), form, da, resources, border, appearCharacs, rect, quadding, xref, resourcesDict, flags, nCombs);
    }

    return true;
}

static void setChildDictEntryValue(Dict *parentDict, const char *childDictName, const char *childDictEntryName, const Ref childDictEntryValue, XRef *xref)
{
    Object childDictionaryObj = parentDict->lookup(childDictName);
    if (!childDictionaryObj.isDict()) {
        childDictionaryObj = Object(std::make_unique<Dict>(xref));
        parentDict->set(childDictName, childDictionaryObj.copy());
    }
    childDictionaryObj.dictSet(childDictEntryName, Object(childDictEntryValue));
}

bool AnnotAppearanceBuilder::drawSignatureFieldText(const FormFieldSignature &field, const Form *form, const std::string &_da, const AnnotBorder *border, const PDFRectangle &rect, XRef &xref, Dict &resourcesDict)
{
    const std::string &contents = field.getCustomAppearanceContent().toStr();
    if (contents.empty()) {
        return false;
    }

    if (field.getImageResource() != Ref::INVALID()) {
        const double width = rect.x2 - rect.x1;
        const double height = rect.y2 - rect.y1;
        static const char *imageResourceId = "SigImg";
        setChildDictEntryValue(&resourcesDict, "XObject", imageResourceId, field.getImageResource(), &xref);
        Matrix matrix = { 1.0, 0.0, 0.0, 1.0, 0.0, 0.0 };
        matrix.scale(width, height);
        const std::string imgBuffer = GooString::format("\nq {0:.1g} {1:.1g} {2:.1g} {3:.1g} {4:.1g} {5:.1g} cm /{6:s} Do Q\n", matrix.m[0], matrix.m[1], matrix.m[2], matrix.m[3], matrix.m[4], matrix.m[5], imageResourceId);
        append(imgBuffer.c_str());
    }

    const std::string &leftText = field.getCustomAppearanceLeftContent().toStr();
    if (leftText.empty()) {
        drawSignatureFieldText(contents, form, DefaultAppearance(_da), border, rect, xref, resourcesDict, 0, false /* don't center vertically */, false /* don't center horizontally */);
    } else {
        const double halfWidth = (rect.x2 - rect.x1) / 2;

        double borderWidth = 0;

        if (border) {
            borderWidth = border->getWidth();
        }

        const double wMax = (rect.x2 - rect.x1) - 2 * borderWidth - 4;
        const double hMax = (rect.y2 - rect.y1) - 2 * borderWidth;

        DefaultAppearance daLeft(_da);

        double leftFontSize = field.getCustomAppearanceLeftFontSize();
        if (leftFontSize == 0) {
            std::shared_ptr<GfxFont> font = form->getDefaultResources()->lookupFont(daLeft.getFontName());
            leftFontSize = Annot::calculateFontSize(form, *font, leftText, wMax / 2.0, hMax);
        }
        daLeft.setFontPtSize(leftFontSize);

        PDFRectangle rectLeft(rect.x1, rect.y1, rect.x1 + halfWidth, rect.y2);
        drawSignatureFieldText(leftText, form, daLeft, border, rectLeft, xref, resourcesDict, 0, true /* center vertically */, true /* center horizontally */);

        DefaultAppearance daRight(_da);

        double fontSize = daRight.getFontPtSize();
        if (fontSize == 0) {
            std::shared_ptr<GfxFont> font = form->getDefaultResources()->lookupFont(daLeft.getFontName());
            fontSize = Annot::calculateFontSize(form, *font, contents, wMax / 2.0, hMax);
        }
        daRight.setFontPtSize(fontSize);

        PDFRectangle rectRight(rectLeft.x2, rect.y1, rect.x2, rect.y2);
        drawSignatureFieldText(contents, form, daRight, border, rectRight, xref, resourcesDict, halfWidth, true /* center vertically */, false /* don't center horizontally */);
    }

    return true;
}

void AnnotAppearanceBuilder::drawSignatureFieldText(const std::string &text, const Form *form, const DefaultAppearance &da, const AnnotBorder *border, const PDFRectangle &rect, XRef &xref, Dict &resourcesDict, double leftMargin,
                                                    bool centerVertically, bool centerHorizontally)
{
    double borderWidth = 0;
    append("q\n");

    if (border) {
        borderWidth = border->getWidth();
        if (borderWidth > 0) {
            setLineStyleForBorder(*border);
        }
    }

    // Box size
    const double width = rect.x2 - rect.x1;
    const double height = rect.y2 - rect.y1;
    const double textmargin = borderWidth * 2;
    const double textwidth = width - 2 * textmargin;

    // create a Helvetica fake font
    std::shared_ptr<const GfxFont> font = form ? form->getDefaultResources()->lookupFont(da.getFontName()) : nullptr;
    if (!font) {
        font = createAnnotDrawFont(&xref, &resourcesDict, da.getFontName());
    }

    // Setup text clipping
    appendf("{0:.2f} {1:.2f} {2:.2f} {3:.2f} re W n\n", leftMargin + textmargin, textmargin, textwidth, height - 2 * textmargin);
    setDrawColor(*da.getFontColor(), true);
    const DrawMultiLineTextResult textCommands =
            drawMultiLineText(text, textwidth, form, *font, da.getFontName(), da.getFontPtSize(), centerHorizontally ? VariableTextQuadding::centered : VariableTextQuadding::leftJustified, 0 /*borderWidth*/);

    double yDelta = height - textmargin;
    if (centerVertically) {
        const double outTextHeight = textCommands.nLines * da.getFontPtSize();
        if (outTextHeight < height) {
            yDelta = height - (height - outTextHeight) / 2;
        }
    }
    appendf("BT 1 0 0 1 {0:.2f} {1:.2f} Tm\n", leftMargin + textmargin, yDelta);
    append(textCommands.text.c_str());
    append("ET Q\n");
}

bool AnnotAppearanceBuilder::drawFormFieldChoice(const FormFieldChoice &fieldChoice, const Form *form, const GfxResources *resources, const std::string &da, const AnnotBorder *border, const AnnotAppearanceCharacs *appearCharacs,
                                                 const PDFRectangle &rect, XRef &xref, Dict &resourcesDict)
{
    const GooString *selected;
    VariableTextQuadding quadding;

    if (fieldChoice.hasTextQuadding()) {
        quadding = fieldChoice.getTextQuadding();
    } else if (form) {
        quadding = form->getTextQuadding();
    } else {
        quadding = VariableTextQuadding::leftJustified;
    }

    if (fieldChoice.isCombo()) {
        selected = fieldChoice.getAppearanceSelectedChoice();
        if (selected) {
            return drawText(selected->toStr(), form, da, resources, border, appearCharacs, rect, quadding, xref, resourcesDict, EmitMarkedContentDrawTextFlag);
            //~ Acrobat draws a popup icon on the right side
        }
        // list box
    } else {
        return drawListBox(fieldChoice, border, rect, da, resources, quadding, &xref, &resourcesDict);
    }

    return true;
}

// Should we also merge Arrays?
static void recursiveMergeDicts(Dict *primary, const Dict *secondary, RefRecursionChecker *alreadySeenDicts)
{
    for (int i = 0; i < secondary->getLength(); ++i) {
        const std::string &key = secondary->getKey(i);
        if (!primary->hasKey(key)) {
            primary->add(key, secondary->lookup(key).deepCopy());
        } else {
            Ref primaryRef;
            Object primaryObj = primary->lookup(key, &primaryRef);
            if (primaryObj.isDict()) {
                Ref secondaryRef;
                Object secondaryObj = secondary->lookup(key, &secondaryRef);
                if (secondaryObj.isDict()) {
                    if (!alreadySeenDicts->insert(primaryRef) || !alreadySeenDicts->insert(secondaryRef)) {
                        // bad PDF
                        return;
                    }
                    recursiveMergeDicts(primaryObj.getDict(), secondaryObj.getDict(), alreadySeenDicts);
                }
            }
        }
    }
}

static void recursiveMergeDicts(Dict *primary, const Dict *secondary)
{
    RefRecursionChecker alreadySeenDicts;
    recursiveMergeDicts(primary, secondary, &alreadySeenDicts);
}

void AnnotWidget::generateFieldAppearance(bool *addedDingbatsResource)
{
    AnnotAppearanceBuilder appearBuilder;

    // draw the background
    if (appearCharacs) {
        const AnnotColor *aColor = appearCharacs->getBackColor();
        if (aColor) {
            appearBuilder.setDrawColor(*aColor, true);
            appearBuilder.appendf("0 0 {0:.2f} {1:.2f} re f\n", rect->x2 - rect->x1, rect->y2 - rect->y1);
        }
    }

    // draw the border
    if (appearCharacs && border && border->getWidth() > 0) {
        appearBuilder.drawFieldBorder(*field, *border, *appearCharacs, *rect);
    }

    const std::string &fieldDA = field->getDefaultAppearance();

    // Let's init resourcesDictObj and resources.
    // In PDF 1.2, an additional entry in the field dictionary, DR, was defined.
    // Beginning with PDF 1.5, this entry is obsolete.
    // And yet Acrobat Reader seems to be taking a field's DR into account.
    Object resourcesDictObj;
    const GfxResources *resources = nullptr;
    std::unique_ptr<GfxResources> resourcesToFree = nullptr;
    if (field->getObj() && field->getObj()->isDict()) {
        // Let's use a field's resource dictionary.
        resourcesDictObj = field->getObj()->dictLookup("DR");
        if (resourcesDictObj.isDict()) {
            if (form && form->getDefaultResourcesObj()->isDict()) {
                resourcesDictObj = resourcesDictObj.deepCopy();
                recursiveMergeDicts(resourcesDictObj.getDict(), form->getDefaultResourcesObj()->getDict());
            }
            resourcesToFree = std::make_unique<GfxResources>(doc->getXRef(), resourcesDictObj.getDict(), nullptr);
            resources = resourcesToFree.get();
        }
    }
    if (!resourcesDictObj.isDict()) {
        // No luck with a field's resource dictionary. Let's use an AcroForm's resource dictionary.
        if (form && form->getDefaultResourcesObj()->isDict()) {
            resourcesDictObj = form->getDefaultResourcesObj()->deepCopy();
            resources = form->getDefaultResources();
        }
    }
    if (!resourcesDictObj.isDict()) {
        resourcesDictObj = Object(std::make_unique<Dict>(doc->getXRef()));
    }

    auto appearDict = std::make_unique<Dict>(doc->getXRef());
    {
        const std::string &daToUse = fieldDA.empty() && form ? form->getDefaultAppearance() : fieldDA;
        const bool success = appearBuilder.drawFormField(*field, form, resources, daToUse, border.get(), appearCharacs.get(), *rect, appearState, *doc->getXRef(), *resourcesDictObj.getDict());
        if (!success && form && daToUse != form->getDefaultAppearance()) {
            appearBuilder.drawFormField(*field, form, resources, form->getDefaultAppearance(), border.get(), appearCharacs.get(), *rect, appearState, *doc->getXRef(), *resourcesDictObj.getDict());
        }
    }

    if (addedDingbatsResource) {
        *addedDingbatsResource = appearBuilder.getAddedDingbatsResource();
    }

    const std::string &appearBuf = appearBuilder.buffer();
    // fill the appearance stream dictionary
    appearDict->add("Length", Object(static_cast<int>(appearBuf.size())));
    appearDict->add("Subtype", Object::name("Form"));
    auto bbox = std::make_unique<Array>(doc->getXRef());
    bbox->add(Object(0));
    bbox->add(Object(0));
    bbox->add(Object(rect->x2 - rect->x1));
    bbox->add(Object(rect->y2 - rect->y1));
    appearDict->add("BBox", Object(std::move(bbox)));

    // set the resource dictionary
    if (resourcesDictObj.getDict()->getLength() > 0) {
        appearDict->set("Resources", std::move(resourcesDictObj));
    }

    // build the appearance stream
    std::vector<char> data { appearBuf.c_str(), appearBuf.c_str() + appearBuf.size() };
    auto appearStream = std::make_unique<AutoFreeMemStream>(std::move(data), Object(std::move(appearDict)));
    if (hasBeenUpdated) {
        // We should technically do this for all annots but AnnotFreeText
        // forms are particularly special since we're potentially embeddeing a font so we really need
        // to set the AP and not let other renderers guess it from the contents
        // In addition, we keep the appearState of checkboxes to prevent them from being deselected
        bool keepAppearState = field->getType() == formButton && static_cast<const FormFieldButton *>(field)->getButtonType() == formButtonCheck;
        setNewAppearance(Object(std::move(appearStream)), keepAppearState);
    } else {
        appearance = Object(std::move(appearStream));
    }
}

void AnnotWidget::updateAppearanceStream()
{
    // If this the first time updateAppearanceStream() is called on this widget,
    // destroy the AP dictionary because we are going to create a new one.
    if (updatedAppearanceStream == Ref::INVALID()) {
        invalidateAppearance(); // Delete AP dictionary and all referenced streams
    }

    // There's no need to create a new appearance stream if NeedAppearances is
    // set, because it will be ignored next time anyway.
    // except if signature type; most readers can't figure out how to create an
    // appearance for those and thus renders nothing.
    if (form && form->getNeedAppearances()) {
        if (field->getType() != FormFieldType::formSignature) {
            return;
        }
    }

    // Create the new appearance
    generateFieldAppearance();

    // Fetch the appearance stream we've just created
    Object obj1 = appearance.fetch(doc->getXRef());

    // If this the first time updateAppearanceStream() is called on this widget,
    // create a new AP dictionary containing the new appearance stream.
    // Otherwise, just update the stream we had created previously.
    if (updatedAppearanceStream == Ref::INVALID()) {
        // Write the appearance stream
        updatedAppearanceStream = doc->getXRef()->addIndirectObject(obj1);

        // Write the AP dictionary
        obj1 = Object(std::make_unique<Dict>(doc->getXRef()));
        obj1.dictAdd("N", Object(updatedAppearanceStream));

        // Update our internal pointers to the appearance dictionary
        appearStreams = std::make_unique<AnnotAppearance>(doc, &obj1);

        update("AP", std::move(obj1));
    } else {
        // Replace the existing appearance stream
        doc->getXRef()->setModifiedObject(&obj1, updatedAppearanceStream);
    }
}

void AnnotWidget::draw(Gfx *gfx, bool printing)
{
    if (!isVisible(printing)) {
        return;
    }

    annotLocker();

    // Only construct the appearance stream when
    // - annot doesn't have an AP or
    // - NeedAppearances is true and it isn't a Signature. There isn't enough data in our objects to generate it for signatures
    bool addedDingbatsResource = false;
    if (field) {
        if (appearance.isNull() || (field->getType() != FormFieldType::formSignature && form && form->getNeedAppearances())) {
            generateFieldAppearance(&addedDingbatsResource);
        }
    }

    // draw the appearance stream
    Object obj = appearance.fetch(gfx->getXRef());
    if (addedDingbatsResource) {
        // We are forcing ZaDb but the font does not exist
        // so create a fake one
        // If refactoring this code remember to test issue #1642 afterwards
        auto fontDict = std::make_unique<Dict>(gfx->getXRef());
        fontDict->add("BaseFont", Object::name("ZapfDingbats"));
        fontDict->add("Subtype", Object::name("Type1"));

        auto fontsDict = std::make_unique<Dict>(gfx->getXRef());
        fontsDict->add("ZaDb", Object(std::move(fontDict)));

        Dict dict(gfx->getXRef());
        dict.add("Font", Object(std::move(fontsDict)));
        gfx->pushResources(&dict);
    }
    gfx->drawAnnot(&obj, nullptr, color.get(), rect->x1, rect->y1, rect->x2, rect->y2, getRotation());
    if (addedDingbatsResource) {
        gfx->popResources();
    }
}

//------------------------------------------------------------------------
// AnnotMovie
//------------------------------------------------------------------------
AnnotMovie::AnnotMovie(PDFDoc *docA, const PDFRectangle &rectA, const Movie &movieA) : Annot(docA, rectA)
{
    type = typeMovie;
    annotObj.dictSet("Subtype", Object::name("Movie"));

    movie = movieA.copy();
    // TODO: create movie dict from movieA

    initialize(annotObj.getDict());
}

AnnotMovie::AnnotMovie(PDFDoc *docA, Object &&dictObject, const Object &obj) : Annot(docA, std::move(dictObject), obj)
{
    type = typeMovie;
    initialize(annotObj.getDict());
}

AnnotMovie::~AnnotMovie() = default;

void AnnotMovie::initialize(Dict *dict)
{
    Object obj1;

    obj1 = dict->lookup("T");
    if (obj1.isString()) {
        title = obj1.takeString();
    }

    Object movieDict = dict->lookup("Movie");
    if (movieDict.isDict()) {
        Object obj2 = dict->lookup("A");
        if (obj2.isDict()) {
            movie = std::make_unique<Movie>(&movieDict, &obj2);
        } else {
            movie = std::make_unique<Movie>(&movieDict);
        }
        if (!movie->isOk()) {
            movie = nullptr;
            ok = false;
        }
    } else {
        error(errSyntaxError, -1, "Bad Annot Movie");
        ok = false;
    }
}

void AnnotMovie::draw(Gfx *gfx, bool printing)
{
    if (!isVisible(printing)) {
        return;
    }

    annotLocker();
    if (appearance.isNull() && movie->getShowPoster()) {
        int width, height;
        Object poster = movie->getPoster();
        movie->getAspect(&width, &height);

        if (width != -1 && height != -1 && !poster.isNone()) {
            std::string appearBuf;
            appearBuf.append("q\n");
            GooString::appendf(appearBuf, "{0:d} 0 0 {1:d} 0 0 cm\n", width, height);
            appearBuf.append("/MImg Do\n");
            appearBuf.append("Q\n");

            auto imgDict = std::make_unique<Dict>(gfx->getXRef());
            imgDict->set("MImg", std::move(poster));

            auto resDict = std::make_unique<Dict>(gfx->getXRef());
            resDict->set("XObject", Object(std::move(imgDict)));

            auto formDict = std::make_unique<Dict>(gfx->getXRef());
            formDict->set("Length", Object(static_cast<int>(appearBuf.size())));
            formDict->set("Subtype", Object::name("Form"));
            formDict->set("Name", Object::name("FRM"));
            auto bboxArray = std::make_unique<Array>(gfx->getXRef());
            bboxArray->add(Object(0));
            bboxArray->add(Object(0));
            bboxArray->add(Object(width));
            bboxArray->add(Object(height));
            formDict->set("BBox", Object(std::move(bboxArray)));
            auto matrix = std::make_unique<Array>(gfx->getXRef());
            matrix->add(Object(1));
            matrix->add(Object(0));
            matrix->add(Object(0));
            matrix->add(Object(1));
            matrix->add(Object(-width / 2));
            matrix->add(Object(-height / 2));
            formDict->set("Matrix", Object(std::move(matrix)));
            formDict->set("Resources", Object(std::move(resDict)));

            std::vector<char> data { appearBuf.c_str(), appearBuf.c_str() + appearBuf.size() };
            auto mStream = std::make_unique<AutoFreeMemStream>(std::move(data), Object(std::move(formDict)));

            auto dict = std::make_unique<Dict>(gfx->getXRef());
            dict->set("FRM", Object(std::move(mStream)));

            auto resDict2 = std::make_unique<Dict>(gfx->getXRef());
            resDict2->set("XObject", Object(std::move(dict)));

            appearBuf.clear();
            appearBuf.append("q\n");
            GooString::appendf(appearBuf, "0 0 {0:d} {1:d} re W n\n", width, height);
            appearBuf.append("q\n");
            GooString::appendf(appearBuf, "0 0 {0:d} {1:d} re W n\n", width, height);
            GooString::appendf(appearBuf, "1 0 0 1 {0:d} {1:d} cm\n", width / 2, height / 2);
            appearBuf.append("/FRM Do\n");
            appearBuf.append("Q\n");
            appearBuf.append("Q\n");

            const std::array<double, 4> bbox = { 0, 0, static_cast<double>(width), static_cast<double>(height) };
            appearance = createForm(appearBuf, bbox, false, std::move(resDict2));
        }
    }

    // draw the appearance stream
    Object obj = appearance.fetch(gfx->getXRef());
    gfx->drawAnnot(&obj, nullptr, color.get(), rect->x1, rect->y1, rect->x2, rect->y2, getRotation());
}

//------------------------------------------------------------------------
// AnnotScreen
//------------------------------------------------------------------------
AnnotScreen::AnnotScreen(PDFDoc *docA, const PDFRectangle &rectA) : Annot(docA, rectA)
{
    type = typeScreen;

    annotObj.dictSet("Subtype", Object::name("Screen"));
    initialize(annotObj.getDict());
}

AnnotScreen::AnnotScreen(PDFDoc *docA, Object &&dictObject, const Object &obj) : Annot(docA, std::move(dictObject), obj)
{
    type = typeScreen;
    initialize(annotObj.getDict());
}

AnnotScreen::~AnnotScreen() = default;

void AnnotScreen::initialize(Dict *dict)
{
    Object obj1;

    obj1 = dict->lookup("T");
    if (obj1.isString()) {
        title = std::make_unique<GooString>(obj1.getString());
    }

    obj1 = dict->lookup("A");
    if (obj1.isDict()) {
        action = LinkAction::parseAction(&obj1, doc->getCatalog()->getBaseURI());
        if (action && action->getKind() == actionRendition && page == 0) {
            error(errSyntaxError, -1, "Invalid Rendition action: associated screen annotation without P");
            action = nullptr;
            ok = false;
        }
    }

    additionalActions = dict->lookupNF("AA").copy();

    obj1 = dict->lookup("MK");
    if (obj1.isDict()) {
        appearCharacs = std::make_unique<AnnotAppearanceCharacs>(obj1.getDict());
    }
}

std::unique_ptr<LinkAction> AnnotScreen::getAdditionalAction(AdditionalActionsType additionalActionType)
{
    if (additionalActionType == actionFocusIn || additionalActionType == actionFocusOut) { // not defined for screen annotation
        return nullptr;
    }

    return ::getAdditionalAction(additionalActionType, &additionalActions, doc);
}

//------------------------------------------------------------------------
// AnnotStamp
//------------------------------------------------------------------------
AnnotStamp::AnnotStamp(PDFDoc *docA, const PDFRectangle &rectA) : AnnotMarkup(docA, rectA)
{
    type = typeStamp;
    annotObj.dictSet("Subtype", Object::name("Stamp"));
    initialize(annotObj.getDict());
}

AnnotStamp::AnnotStamp(PDFDoc *docA, Object &&dictObject, const Object &obj) : AnnotMarkup(docA, std::move(dictObject), obj)
{
    type = typeStamp;
    initialize(annotObj.getDict());
}

AnnotStamp::~AnnotStamp() = default;

void AnnotStamp::initialize(Dict *dict)
{
    Object obj1 = dict->lookup("Name");
    if (obj1.isName()) {
        icon = obj1.getNameString();
    } else {
        icon = std::string { "Draft" };
    }

    updatedAppearanceStream = Ref::INVALID();
}

void AnnotStamp::generateStampCustomAppearance()
{
    Ref imgRef = stampImageHelper->getRef();
    const std::string imgStrName = "X" + std::to_string(imgRef.num);

    AnnotAppearanceBuilder appearBuilder;
    appearBuilder.append("q\n");
    appearBuilder.append("/GS0 gs\n");
    appearBuilder.appendf("{0:.3f} 0 0 {1:.3f} 0 0 cm\n", rect->x2 - rect->x1, rect->y2 - rect->y1);
    appearBuilder.append("/");
    appearBuilder.append(imgStrName.c_str());
    appearBuilder.append(" Do\n");
    appearBuilder.append("Q\n");

    std::unique_ptr<Dict> resDict = createResourcesDict(imgStrName.c_str(), Object(imgRef), "GS0", opacity, nullptr);

    const std::array<double, 4> bboxArray = { 0, 0, rect->x2 - rect->x1, rect->y2 - rect->y1 };
    const std::string &appearBuf = appearBuilder.buffer();
    appearance = createForm(appearBuf, bboxArray, false, std::move(resDict));

    if (updatedAppearanceStream == Ref::INVALID()) {
        updatedAppearanceStream = doc->getXRef()->addIndirectObject(appearance);
    } else {
        Object obj1 = appearance.fetch(doc->getXRef());
        doc->getXRef()->setModifiedObject(&obj1, updatedAppearanceStream);
    }

    Object obj1 = Object(std::make_unique<Dict>(doc->getXRef()));
    obj1.dictAdd("N", Object(updatedAppearanceStream));
    update("AP", std::move(obj1));
}

void AnnotStamp::updateAppearanceResDict()
{
    if (appearance.isNull()) {
        if (stampImageHelper != nullptr) {
            generateStampCustomAppearance();
        } else {
            generateStampDefaultAppearance();
        }
    }
}

Object AnnotStamp::getAppearanceResDict()
{
    updateAppearanceResDict();

    return Annot::getAppearanceResDict();
}

void AnnotStamp::generateStampDefaultAppearance()
{
    std::unique_ptr<Dict> extGStateDict;
    AnnotAppearanceBuilder defaultAppearanceBuilder;

    double stampUnscaledWidth;
    double stampUnscaledHeight;
    const char *stampCode;
    if (icon == "Approved") {
        stampUnscaledWidth = ANNOT_STAMP_APPROVED_WIDTH;
        stampUnscaledHeight = ANNOT_STAMP_APPROVED_HEIGHT;
        stampCode = ANNOT_STAMP_APPROVED;
        extGStateDict = getApprovedStampExtGStateDict(doc);
    } else if (icon == "AsIs") {
        stampUnscaledWidth = ANNOT_STAMP_AS_IS_WIDTH;
        stampUnscaledHeight = ANNOT_STAMP_AS_IS_HEIGHT;
        stampCode = ANNOT_STAMP_AS_IS;
        extGStateDict = getAsIsStampExtGStateDict(doc);
    } else if (icon == "Confidential") {
        stampUnscaledWidth = ANNOT_STAMP_CONFIDENTIAL_WIDTH;
        stampUnscaledHeight = ANNOT_STAMP_CONFIDENTIAL_HEIGHT;
        stampCode = ANNOT_STAMP_CONFIDENTIAL;
        extGStateDict = getConfidentialStampExtGStateDict(doc);
    } else if (icon == "Final") {
        stampUnscaledWidth = ANNOT_STAMP_FINAL_WIDTH;
        stampUnscaledHeight = ANNOT_STAMP_FINAL_HEIGHT;
        stampCode = ANNOT_STAMP_FINAL;
        extGStateDict = getFinalStampExtGStateDict(doc);
    } else if (icon == "Experimental") {
        stampUnscaledWidth = ANNOT_STAMP_EXPERIMENTAL_WIDTH;
        stampUnscaledHeight = ANNOT_STAMP_EXPERIMENTAL_HEIGHT;
        stampCode = ANNOT_STAMP_EXPERIMENTAL;
        extGStateDict = getExperimentalStampExtGStateDict(doc);
    } else if (icon == "Expired") {
        stampUnscaledWidth = ANNOT_STAMP_EXPIRED_WIDTH;
        stampUnscaledHeight = ANNOT_STAMP_EXPIRED_HEIGHT;
        stampCode = ANNOT_STAMP_EXPIRED;
        extGStateDict = getExpiredStampExtGStateDict(doc);
    } else if (icon == "NotApproved") {
        stampUnscaledWidth = ANNOT_STAMP_NOT_APPROVED_WIDTH;
        stampUnscaledHeight = ANNOT_STAMP_NOT_APPROVED_HEIGHT;
        stampCode = ANNOT_STAMP_NOT_APPROVED;
        extGStateDict = getNotApprovedStampExtGStateDict(doc);
    } else if (icon == "NotForPublicRelease") {
        stampUnscaledWidth = ANNOT_STAMP_NOT_FOR_PUBLIC_RELEASE_WIDTH;
        stampUnscaledHeight = ANNOT_STAMP_NOT_FOR_PUBLIC_RELEASE_HEIGHT;
        stampCode = ANNOT_STAMP_NOT_FOR_PUBLIC_RELEASE;
        extGStateDict = getNotForPublicReleaseStampExtGStateDict(doc);
    } else if (icon == "Sold") {
        stampUnscaledWidth = ANNOT_STAMP_SOLD_WIDTH;
        stampUnscaledHeight = ANNOT_STAMP_SOLD_HEIGHT;
        stampCode = ANNOT_STAMP_SOLD;
        extGStateDict = getSoldStampExtGStateDict(doc);
    } else if (icon == "Departmental") {
        stampUnscaledWidth = ANNOT_STAMP_DEPARTMENTAL_WIDTH;
        stampUnscaledHeight = ANNOT_STAMP_DEPARTMENTAL_HEIGHT;
        stampCode = ANNOT_STAMP_DEPARTMENTAL;
        extGStateDict = getDepartmentalStampExtGStateDict(doc);
    } else if (icon == "ForComment") {
        stampUnscaledWidth = ANNOT_STAMP_FOR_COMMENT_WIDTH;
        stampUnscaledHeight = ANNOT_STAMP_FOR_COMMENT_HEIGHT;
        stampCode = ANNOT_STAMP_FOR_COMMENT;
        extGStateDict = getForCommentStampExtGStateDict(doc);
    } else if (icon == "ForPublicRelease") {
        stampUnscaledWidth = ANNOT_STAMP_FOR_PUBLIC_RELEASE_WIDTH;
        stampUnscaledHeight = ANNOT_STAMP_FOR_PUBLIC_RELEASE_HEIGHT;
        stampCode = ANNOT_STAMP_FOR_PUBLIC_RELEASE;
        extGStateDict = getForPublicReleaseStampExtGStateDict(doc);
    } else if (icon == "TopSecret") {
        stampUnscaledWidth = ANNOT_STAMP_TOP_SECRET_WIDTH;
        stampUnscaledHeight = ANNOT_STAMP_TOP_SECRET_HEIGHT;
        stampCode = ANNOT_STAMP_TOP_SECRET;
        extGStateDict = getTopSecretStampExtGStateDict(doc);
    } else {
        stampUnscaledWidth = ANNOT_STAMP_DRAFT_WIDTH;
        stampUnscaledHeight = ANNOT_STAMP_DRAFT_HEIGHT;
        stampCode = ANNOT_STAMP_DRAFT;
        extGStateDict = getDraftStampExtGStateDict(doc);
    }

    const std::array<double, 4> bboxArray = { 0, 0, rect->x2 - rect->x1, rect->y2 - rect->y1 };
    const std::string scale = GooString::format("{0:.6g} 0 0 {1:.6g} 0 0 cm\nq\n", bboxArray[2] / stampUnscaledWidth, bboxArray[3] / stampUnscaledHeight);
    defaultAppearanceBuilder.append(scale.c_str());
    defaultAppearanceBuilder.append(stampCode);
    defaultAppearanceBuilder.append("Q\n");

    auto resDict = std::make_unique<Dict>(doc->getXRef());
    resDict->add("ExtGState", Object(std::move(extGStateDict)));

    Object aStream = createForm(defaultAppearanceBuilder.buffer(), bboxArray, true, std::move(resDict));

    AnnotAppearanceBuilder appearanceBuilder;
    appearanceBuilder.append("/GS0 gs\n/Fm0 Do");
    resDict = createResourcesDict("Fm0", std::move(aStream), "GS0", opacity, nullptr);
    appearance = createForm(appearanceBuilder.buffer(), bboxArray, false, std::move(resDict));
}

void AnnotStamp::draw(Gfx *gfx, bool printing)
{
    if (!isVisible(printing)) {
        return;
    }

    annotLocker();

    // generate the appearance stream
    updateAppearanceResDict();

    // draw the appearance stream
    Object obj = appearance.fetch(gfx->getXRef());
    if (appearBBox) {
        gfx->drawAnnot(&obj, nullptr, color.get(), appearBBox->getPageXMin(), appearBBox->getPageYMin(), appearBBox->getPageXMax(), appearBBox->getPageYMax(), getRotation());
    } else {
        gfx->drawAnnot(&obj, nullptr, color.get(), rect->x1, rect->y1, rect->x2, rect->y2, getRotation());
    }
}

void AnnotStamp::setIcon(const std::string &new_icon)
{
    icon = new_icon;

    update("Name", Object::name(icon));
    invalidateAppearance();
}

void AnnotStamp::setCustomImage(std::unique_ptr<AnnotStampImageHelper> &&stampImageHelperA)
{
    if (!stampImageHelperA) {
        return;
    }

    annotLocker();
    if (stampImageHelper) {
        stampImageHelper->removeAnnotStampImageObject();
    }

    stampImageHelper = std::move(stampImageHelperA);

    // Regenerate appearance stream
    invalidateAppearance();
    updateAppearanceResDict();
}

//------------------------------------------------------------------------
// AnnotGeometry
//------------------------------------------------------------------------
AnnotGeometry::AnnotGeometry(PDFDoc *docA, const PDFRectangle &rectA, AnnotSubtype subType) : AnnotMarkup(docA, rectA)
{
    switch (subType) {
    case typeSquare:
        annotObj.dictSet("Subtype", Object::name("Square"));
        break;
    case typeCircle:
        annotObj.dictSet("Subtype", Object::name("Circle"));
        break;
    default:
        assert(0 && "Invalid subtype for AnnotGeometry\n");
    }

    initialize(annotObj.getDict());
}

AnnotGeometry::AnnotGeometry(PDFDoc *docA, Object &&dictObject, const Object &obj) : AnnotMarkup(docA, std::move(dictObject), obj)
{
    // the real type will be read in initialize()
    type = typeSquare;
    initialize(annotObj.getDict());
}

AnnotGeometry::~AnnotGeometry() = default;

void AnnotGeometry::initialize(Dict *dict)
{
    Object obj1;

    obj1 = dict->lookup("Subtype");
    if (obj1.isName()) {
        if (obj1.isName("Square")) {
            type = typeSquare;
        } else if (obj1.isName("Circle")) {
            type = typeCircle;
        }
    }

    obj1 = dict->lookup("IC");
    if (obj1.isArray()) {
        interiorColor = std::make_unique<AnnotColor>(*obj1.getArray());
    }

    obj1 = dict->lookup("BS");
    if (obj1.isDict()) {
        border = std::make_unique<AnnotBorderBS>(obj1.getDict());
    } else if (!border) {
        border = std::make_unique<AnnotBorderBS>();
    }

    obj1 = dict->lookup("BE");
    if (obj1.isDict()) {
        borderEffect = std::make_unique<AnnotBorderEffect>(obj1.getDict());
    }

    obj1 = dict->lookup("RD");
    if (obj1.isArray()) {
        geometryRect = parseDiffRectangle(obj1.getArray(), rect.get());
    }
}

void AnnotGeometry::setType(AnnotSubtype new_type)
{
    const char *typeName = nullptr; /* squelch bogus compiler warning */

    switch (new_type) {
    case typeSquare:
        typeName = "Square";
        break;
    case typeCircle:
        typeName = "Circle";
        break;
    default:
        assert(!"Invalid subtype");
    }

    type = new_type;
    update("Subtype", Object::name(typeName));
    invalidateAppearance();
}

void AnnotGeometry::setInteriorColor(std::unique_ptr<AnnotColor> &&new_color)
{
    if (new_color) {
        Object obj1 = new_color->writeToObject(doc->getXRef());
        update("IC", std::move(obj1));
        interiorColor = std::move(new_color);
    } else {
        interiorColor = nullptr;
        update("IC", Object::null());
    }
    invalidateAppearance();
}

void AnnotGeometry::draw(Gfx *gfx, bool printing)
{
    double ca = 1;

    if (!isVisible(printing)) {
        return;
    }

    annotLocker();
    if (appearance.isNull()) {
        const bool fill = interiorColor && interiorColor->getSpace() != AnnotColor::colorTransparent;
        ca = opacity;

        AnnotAppearanceBuilder appearBuilder;
        appearBuilder.append("q\n");
        if (color) {
            appearBuilder.setDrawColor(*color, false);
        }

        double borderWidth = border->getWidth();
        appearBuilder.setLineStyleForBorder(*border);

        if (interiorColor) {
            appearBuilder.setDrawColor(*interiorColor, true);
        }

        if (type == typeSquare) {
            appearBuilder.appendf("{0:.2f} {1:.2f} {2:.2f} {3:.2f} re\n", borderWidth / 2.0, borderWidth / 2.0, (rect->x2 - rect->x1) - borderWidth, (rect->y2 - rect->y1) - borderWidth);
            if (fill) {
                if (borderWidth > 0) {
                    appearBuilder.append("b\n");
                } else {
                    appearBuilder.append("f\n");
                }
            } else if (borderWidth > 0) {
                appearBuilder.append("S\n");
            }
        } else {
            const double rx { (rect->x2 - rect->x1) / 2. };
            const double ry { (rect->y2 - rect->y1) / 2. };
            const double bwHalf { borderWidth / 2.0 };
            appearBuilder.drawEllipse(rx, ry, rx - bwHalf, ry - bwHalf, fill, borderWidth > 0);
        }
        appearBuilder.append("Q\n");

        const std::array<double, 4> bbox = { 0, 0, rect->x2 - rect->x1, rect->y2 - rect->y1 };
        if (ca == 1) {
            appearance = createForm(appearBuilder.buffer(), bbox, false, Object {});
        } else {
            Object aStream = createForm(appearBuilder.buffer(), bbox, true, Object {});

            std::string appearBuf("/GS0 gs\n/Fm0 Do");
            std::unique_ptr<Dict> resDict = createResourcesDict("Fm0", std::move(aStream), "GS0", ca, nullptr);
            appearance = createForm(appearBuf, bbox, false, std::move(resDict));
        }
    }

    // draw the appearance stream
    Object obj = appearance.fetch(gfx->getXRef());
    gfx->drawAnnot(&obj, nullptr, color.get(), rect->x1, rect->y1, rect->x2, rect->y2, getRotation());
}

//------------------------------------------------------------------------
// AnnotPolygon
//------------------------------------------------------------------------
AnnotPolygon::AnnotPolygon(PDFDoc *docA, const PDFRectangle &rectA, AnnotSubtype subType) : AnnotMarkup(docA, rectA)
{
    switch (subType) {
    case typePolygon:
        annotObj.dictSet("Subtype", Object::name("Polygon"));
        break;
    case typePolyLine:
        annotObj.dictSet("Subtype", Object::name("PolyLine"));
        break;
    default:
        assert(0 && "Invalid subtype for AnnotGeometry\n");
    }

    // Store dummy path with one null vertex only
    auto a = std::make_unique<Array>(doc->getXRef());
    a->add(Object(0.));
    a->add(Object(0.));
    annotObj.dictSet("Vertices", Object(std::move(a)));

    initialize(annotObj.getDict());
}

AnnotPolygon::AnnotPolygon(PDFDoc *docA, Object &&dictObject, const Object &obj) : AnnotMarkup(docA, std::move(dictObject), obj)
{
    // the real type will be read in initialize()
    type = typePolygon;
    initialize(annotObj.getDict());
}

AnnotPolygon::~AnnotPolygon() = default;

void AnnotPolygon::initialize(Dict *dict)
{
    Object obj1;

    obj1 = dict->lookup("Subtype");
    if (obj1.isName()) {
        if (obj1.isName("Polygon")) {
            type = typePolygon;
        } else if (obj1.isName("PolyLine")) {
            type = typePolyLine;
        }
    }

    obj1 = dict->lookup("Vertices");
    if (obj1.isArray()) {
        vertices = std::make_unique<AnnotPath>(*obj1.getArray());
    } else {
        vertices = std::make_unique<AnnotPath>();
        error(errSyntaxError, -1, "Bad Annot Polygon Vertices");
        ok = false;
    }

    obj1 = dict->lookup("LE");
    if (obj1.isArrayOfLength(2)) {
        Object obj2 = obj1.arrayGet(0);
        if (obj2.isName()) {
            startStyle = parseAnnotLineEndingStyle(obj2);
        } else {
            startStyle = annotLineEndingNone;
        }
        obj2 = obj1.arrayGet(1);
        if (obj2.isName()) {
            endStyle = parseAnnotLineEndingStyle(obj2);
        } else {
            endStyle = annotLineEndingNone;
        }
    } else {
        startStyle = endStyle = annotLineEndingNone;
    }

    obj1 = dict->lookup("IC");
    if (obj1.isArray()) {
        interiorColor = std::make_unique<AnnotColor>(*obj1.getArray());
    }

    obj1 = dict->lookup("BS");
    if (obj1.isDict()) {
        border = std::make_unique<AnnotBorderBS>(obj1.getDict());
    } else if (!border) {
        border = std::make_unique<AnnotBorderBS>();
    }

    obj1 = dict->lookup("BE");
    if (obj1.isDict()) {
        borderEffect = std::make_unique<AnnotBorderEffect>(obj1.getDict());
    }

    obj1 = dict->lookup("IT");
    if (obj1.isName()) {
        const std::string &intentName = obj1.getNameString();

        if (intentName == "PolygonCloud") {
            intent = polygonCloud;
        } else if (intentName == "PolyLineDimension") {
            intent = polylineDimension;
        } else {
            intent = polygonDimension;
        }
    } else {
        intent = polygonCloud;
    }
}

void AnnotPolygon::setType(AnnotSubtype new_type)
{
    const char *typeName = nullptr; /* squelch bogus compiler warning */

    switch (new_type) {
    case typePolygon:
        typeName = "Polygon";
        break;
    case typePolyLine:
        typeName = "PolyLine";
        break;
    default:
        assert(!"Invalid subtype");
    }

    type = new_type;
    update("Subtype", Object::name(typeName));
    invalidateAppearance();
}

void AnnotPolygon::setVertices(const AnnotPath &path)
{
    auto a = std::make_unique<Array>(doc->getXRef());
    for (int i = 0; i < path.getCoordsLength(); i++) {
        a->add(Object(path.getX(i)));
        a->add(Object(path.getY(i)));
    }

    vertices = std::make_unique<AnnotPath>(*a);

    update("Vertices", Object(std::move(a)));
    invalidateAppearance();
}

void AnnotPolygon::setStartEndStyle(AnnotLineEndingStyle start, AnnotLineEndingStyle end)
{
    startStyle = start;
    endStyle = end;

    auto a = std::make_unique<Array>(doc->getXRef());
    a->add(Object::name(convertAnnotLineEndingStyle(startStyle)));
    a->add(Object::name(convertAnnotLineEndingStyle(endStyle)));

    update("LE", Object(std::move(a)));
    invalidateAppearance();
}

void AnnotPolygon::setInteriorColor(std::unique_ptr<AnnotColor> &&new_color)
{
    if (new_color) {
        Object obj1 = new_color->writeToObject(doc->getXRef());
        update("IC", std::move(obj1));
        interiorColor = std::move(new_color);
    } else {
        interiorColor = nullptr;
        update("IC", Object::null());
    }
    invalidateAppearance();
}

void AnnotPolygon::setIntent(AnnotPolygonIntent new_intent)
{
    const char *intentName;

    intent = new_intent;
    if (new_intent == polygonCloud) {
        intentName = "PolygonCloud";
    } else if (new_intent == polylineDimension) {
        intentName = "PolyLineDimension";
    } else { // polygonDimension
        intentName = "PolygonDimension";
    }
    update("IT", Object::name(intentName));
}

void AnnotPolygon::generatePolyLineAppearance(AnnotAppearanceBuilder *appearBuilder)
{
    const bool fill = interiorColor != nullptr;
    const double x1 = vertices->getX(0);
    const double y1 = vertices->getY(0);
    const double x2 = vertices->getX(1);
    const double y2 = vertices->getY(1);
    const double x3 = vertices->getX(vertices->getCoordsLength() - 2);
    const double y3 = vertices->getY(vertices->getCoordsLength() - 2);
    const double x4 = vertices->getX(vertices->getCoordsLength() - 1);
    const double y4 = vertices->getY(vertices->getCoordsLength() - 1);

    const double len_1 = sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));
    // length of last segment
    const double len_2 = sqrt((x4 - x3) * (x4 - x3) + (y4 - y3) * (y4 - y3));

    // segments become positive x direction, coord1 becomes (0,0).
    Matrix matr1, matr2;
    const double angle1 = atan2(y2 - y1, x2 - x1);
    const double angle2 = atan2(y4 - y3, x4 - x3);

    matr1.m[0] = matr1.m[3] = cos(angle1);
    matr1.m[1] = sin(angle1);
    matr1.m[2] = -matr1.m[1];
    matr1.m[4] = x1 - rect->x1;
    matr1.m[5] = y1 - rect->y1;

    matr2.m[0] = matr2.m[3] = cos(angle2);
    matr2.m[1] = sin(angle2);
    matr2.m[2] = -matr2.m[1];
    matr2.m[4] = x3 - rect->x1;
    matr2.m[5] = y3 - rect->y1;

    const double lineEndingSize1 { std::min(6. * border->getWidth(), len_1 / 2) };
    const double lineEndingSize2 { std::min(6. * border->getWidth(), len_2 / 2) };

    if (vertices->getCoordsLength() != 0) {
        double tx, ty;
        matr1.transform(AnnotAppearanceBuilder::lineEndingXShorten(startStyle, lineEndingSize1), 0, &tx, &ty);
        appearBuilder->appendf("{0:.2f} {1:.2f} m\n", tx, ty);
        appearBBox->extendTo(tx, ty);

        for (int i = 1; i < vertices->getCoordsLength() - 1; ++i) {
            appearBuilder->appendf("{0:.2f} {1:.2f} l\n", vertices->getX(i) - rect->x1, vertices->getY(i) - rect->y1);
            appearBBox->extendTo(vertices->getX(i) - rect->x1, vertices->getY(i) - rect->y1);
        }

        if (vertices->getCoordsLength() > 1) {
            matr2.transform(len_2 - AnnotAppearanceBuilder::lineEndingXShorten(endStyle, lineEndingSize2), 0, &tx, &ty);
            appearBuilder->appendf("{0:.2f} {1:.2f} l S\n", tx, ty);
            appearBBox->extendTo(tx, ty);
        }
    }

    if (startStyle != annotLineEndingNone) {
        const double extendX { -AnnotAppearanceBuilder::lineEndingXExtendBBox(startStyle, lineEndingSize1) };
        double tx, ty;
        appearBuilder->drawLineEnding(startStyle, 0, 0, -lineEndingSize1, fill, matr1);
        matr1.transform(extendX, lineEndingSize1 / 2., &tx, &ty);
        appearBBox->extendTo(tx, ty);
        matr1.transform(extendX, -lineEndingSize1 / 2., &tx, &ty);
        appearBBox->extendTo(tx, ty);
    }

    if (endStyle != annotLineEndingNone) {
        const double extendX { AnnotAppearanceBuilder::lineEndingXExtendBBox(endStyle, lineEndingSize2) };
        double tx, ty;
        appearBuilder->drawLineEnding(endStyle, len_2, 0, lineEndingSize2, fill, matr2);
        matr2.transform(len_2 + extendX, lineEndingSize2 / 2., &tx, &ty);
        appearBBox->extendTo(tx, ty);
        matr2.transform(len_2 + extendX, -lineEndingSize2 / 2., &tx, &ty);
        appearBBox->extendTo(tx, ty);
    }
}

void AnnotPolygon::draw(Gfx *gfx, bool printing)
{
    double ca = 1;

    if (!isVisible(printing)) {
        return;
    }

    annotLocker();
    if (appearance.isNull()) {
        appearBBox = std::make_unique<AnnotAppearanceBBox>(*rect);
        ca = opacity;

        AnnotAppearanceBuilder appearBuilder;
        appearBuilder.append("q\n");

        if (color) {
            appearBuilder.setDrawColor(*color, false);
        }

        appearBuilder.setLineStyleForBorder(*border);
        appearBBox->setBorderWidth(std::max(1., border->getWidth()));

        if (interiorColor) {
            appearBuilder.setDrawColor(*interiorColor, true);
        }

        if (type == typePolyLine) {
            generatePolyLineAppearance(&appearBuilder);
        } else {
            if (vertices->getCoordsLength() != 0) {
                appearBuilder.appendf("{0:.2f} {1:.2f} m\n", vertices->getX(0) - rect->x1, vertices->getY(0) - rect->y1);
                appearBBox->extendTo(vertices->getX(0) - rect->x1, vertices->getY(0) - rect->y1);

                for (int i = 1; i < vertices->getCoordsLength(); ++i) {
                    appearBuilder.appendf("{0:.2f} {1:.2f} l\n", vertices->getX(i) - rect->x1, vertices->getY(i) - rect->y1);
                    appearBBox->extendTo(vertices->getX(i) - rect->x1, vertices->getY(i) - rect->y1);
                }

                const double borderWidth = border->getWidth();
                if (interiorColor && interiorColor->getSpace() != AnnotColor::colorTransparent) {
                    if (borderWidth > 0) {
                        appearBuilder.append("b\n");
                    } else {
                        appearBuilder.append("f\n");
                    }
                } else if (borderWidth > 0) {
                    appearBuilder.append("s\n");
                }
            }
        }
        appearBuilder.append("Q\n");

        const std::array<double, 4> bbox = appearBBox->getBBoxRect();
        if (ca == 1) {
            appearance = createForm(appearBuilder.buffer(), bbox, false, Object {});
        } else {
            Object aStream = createForm(appearBuilder.buffer(), bbox, true, Object {});

            std::string appearBuf("/GS0 gs\n/Fm0 Do");
            std::unique_ptr<Dict> resDict = createResourcesDict("Fm0", std::move(aStream), "GS0", ca, nullptr);
            appearance = createForm(appearBuf, bbox, false, std::move(resDict));
        }
    }

    // draw the appearance stream
    Object obj = appearance.fetch(gfx->getXRef());
    if (appearBBox) {
        gfx->drawAnnot(&obj, nullptr, color.get(), appearBBox->getPageXMin(), appearBBox->getPageYMin(), appearBBox->getPageXMax(), appearBBox->getPageYMax(), getRotation());
    } else {
        gfx->drawAnnot(&obj, nullptr, color.get(), rect->x1, rect->y1, rect->x2, rect->y2, getRotation());
    }
}

//------------------------------------------------------------------------
// AnnotCaret
//------------------------------------------------------------------------
AnnotCaret::AnnotCaret(PDFDoc *docA, const PDFRectangle &rectA) : AnnotMarkup(docA, rectA)
{
    type = typeCaret;

    annotObj.dictSet("Subtype", Object::name("Caret"));
    initialize(annotObj.getDict());
}

AnnotCaret::AnnotCaret(PDFDoc *docA, Object &&dictObject, const Object &obj) : AnnotMarkup(docA, std::move(dictObject), obj)
{
    type = typeCaret;
    initialize(annotObj.getDict());
}

AnnotCaret::~AnnotCaret() = default;

void AnnotCaret::initialize(Dict *dict)
{
    Object obj1;

    symbol = symbolNone;
    obj1 = dict->lookup("Sy");
    if (obj1.isName()) {
        if (obj1.isName("P")) {
            symbol = symbolP;
        } else if (obj1.isName("None")) {
            symbol = symbolNone;
        }
    }

    obj1 = dict->lookup("RD");
    if (obj1.isArray()) {
        caretRect = parseDiffRectangle(obj1.getArray(), rect.get());
    }
}

void AnnotCaret::setSymbol(AnnotCaretSymbol new_symbol)
{
    symbol = new_symbol;
    update("Sy", Object::name(new_symbol == symbolP ? "P" : "None"));
    invalidateAppearance();
}

//------------------------------------------------------------------------
// AnnotInk
//------------------------------------------------------------------------
AnnotInk::AnnotInk(PDFDoc *docA, const PDFRectangle &rectA) : AnnotMarkup(docA, rectA)
{
    type = typeInk;

    annotObj.dictSet("Subtype", Object::name("Ink"));

    // Store dummy path with one null vertex only
    auto inkListArray = std::make_unique<Array>(doc->getXRef());
    auto vList = std::make_unique<Array>(doc->getXRef());
    vList->add(Object(0.));
    vList->add(Object(0.));
    inkListArray->add(Object(std::move(vList)));
    annotObj.dictSet("InkList", Object(std::move(inkListArray)));

    drawBelow = false;

    initialize(annotObj.getDict());
}

AnnotInk::AnnotInk(PDFDoc *docA, Object &&dictObject, const Object &obj) : AnnotMarkup(docA, std::move(dictObject), obj)
{
    type = typeInk;
    initialize(annotObj.getDict());
}

AnnotInk::~AnnotInk() = default;

void AnnotInk::initialize(Dict *dict)
{
    Object obj1;

    obj1 = dict->lookup("InkList");
    if (obj1.isArray()) {
        parseInkList(*obj1.getArray());
    } else {
        error(errSyntaxError, -1, "Bad Annot Ink List");

        obj1 = dict->lookup("AP");
        // Although InkList is required, it should be ignored
        // when there is an AP entry in the Annot, so do not fail
        // when that happens
        if (!obj1.isDict()) {
            ok = false;
        }
    }

    drawBelow = false;

    obj1 = getAppearanceResDict();
    if (obj1.isDict()) {
        const Object extGState = obj1.dictLookup("ExtGState");
        if (extGState.isDict()) {
            const Dict *extGStateDict = extGState.getDict();
            if (extGStateDict->getLength() > 0) {
                obj1 = extGStateDict->getVal(0);
                if (obj1.isDict() && obj1.dictLookup("BM").isName("Multiply")) {
                    drawBelow = true;
                }
            }
        }
    }

    obj1 = dict->lookup("BS");
    if (obj1.isDict()) {
        border = std::make_unique<AnnotBorderBS>(obj1.getDict());
    } else if (!border) {
        border = std::make_unique<AnnotBorderBS>();
    }
}

void AnnotInk::writeInkList(const std::vector<std::unique_ptr<AnnotPath>> &paths, Array *dest_array)
{
    for (const auto &path : paths) {
        auto a = std::make_unique<Array>(doc->getXRef());
        for (int j = 0; j < path->getCoordsLength(); ++j) {
            a->add(Object(path->getX(j)));
            a->add(Object(path->getY(j)));
        }
        dest_array->add(Object(std::move(a)));
    }
}

void AnnotInk::parseInkList(const Array &array)
{
    int inkListLength = array.getLength();
    inkList.clear();
    inkList.reserve(inkListLength);
    for (int i = 0; i < inkListLength; i++) {
        Object obj2 = array.get(i);
        if (obj2.isArray()) {
            inkList.push_back(std::make_unique<AnnotPath>(*obj2.getArray()));
        } else {
            inkList.emplace_back();
        }
    }
}

void AnnotInk::setInkList(const std::vector<std::unique_ptr<AnnotPath>> &paths)
{
    auto a = std::make_unique<Array>(doc->getXRef());
    writeInkList(paths, a.get());

    parseInkList(*a);
    annotObj.dictSet("InkList", Object(std::move(a)));
    invalidateAppearance();
    generateInkAppearance();
}

void AnnotInk::setDrawBelow(bool drawBelow_)
{
    drawBelow = drawBelow_;
    invalidateAppearance();
    generateInkAppearance();
}

bool AnnotInk::getDrawBelow() const
{
    return drawBelow;
}

void AnnotInk::generateInkAppearance()
{
    Object newAppearance;

    appearBBox = std::make_unique<AnnotAppearanceBBox>(*rect);

    AnnotAppearanceBuilder appearBuilder;
    if (opacity != 1 || drawBelow) {
        appearBuilder.append("/GS0 gs\n");
    }
    appearBuilder.append("q\n");

    if (color) {
        appearBuilder.setDrawColor(*color, false);
    }

    if (border) {
        appearBuilder.setLineStyleForBorder(*border);
        /* It is easier to have the appearance bbox equal the annotation rect
        (especially when the appearance stream is saved to the file), so we
        don't add a border width to the bbox. This is not necessary as the
        border is never drawn and applications are responsible for setting a
        rect big enough in the first place.
        However, this border width was set before the drawBelow property was
        introduced and apps may rely on that behavior. Therefore, we set it in
        the case that appearance streams are not saved (i.e. when drawBelow is
        false) as it does not introduce bugs. */
        if (!drawBelow) {
            appearBBox->setBorderWidth(std::max(1.0, border->getWidth()));
        }
    }

    for (const auto &path : inkList) {
        if (path && path->getCoordsLength() != 0) {
            appearBuilder.appendf("{0:.2f} {1:.2f} m\n", path->getX(0) - rect->x1, path->getY(0) - rect->y1);
            appearBBox->extendTo(path->getX(0) - rect->x1, path->getY(0) - rect->y1);

            for (int j = 1; j < path->getCoordsLength(); ++j) {
                appearBuilder.appendf("{0:.2f} {1:.2f} l\n", path->getX(j) - rect->x1, path->getY(j) - rect->y1);
                appearBBox->extendTo(path->getX(j) - rect->x1, path->getY(j) - rect->y1);
            }

            appearBuilder.append("S\n");
        }
    }

    appearBuilder.append("Q\n");

    const std::array<double, 4> bbox = appearBBox->getBBoxRect();

    if (opacity == 1 && !drawBelow) {
        newAppearance = createForm(appearBuilder.buffer(), bbox, false, Object {});
    } else {
        std::unique_ptr<Dict> resDict = createResourcesDict(nullptr, Object::null(), "GS0", opacity, drawBelow ? "Multiply" : nullptr);
        newAppearance = createForm(appearBuilder.buffer(), bbox, false, std::move(resDict));
    }

    /* If the annotation is drawn below (highlighting), we must save the
    appearance stream so the multiply blend mode can be saved */
    if (drawBelow) {
        setNewAppearance(std::move(newAppearance));
    } else {
        appearance = std::move(newAppearance);
    }
}

void AnnotInk::draw(Gfx *gfx, bool printing)
{
    if (!isVisible(printing)) {
        return;
    }

    annotLocker();
    if (appearance.isNull()) {
        generateInkAppearance();
    }

    // draw the appearance stream
    Object obj = appearance.fetch(gfx->getXRef());
    if (appearBBox) {
        gfx->drawAnnot(&obj, nullptr, color.get(), appearBBox->getPageXMin(), appearBBox->getPageYMin(), appearBBox->getPageXMax(), appearBBox->getPageYMax(), getRotation());
    } else {
        gfx->drawAnnot(&obj, nullptr, color.get(), rect->x1, rect->y1, rect->x2, rect->y2, getRotation());
    }
}

//------------------------------------------------------------------------
// AnnotFileAttachment
//------------------------------------------------------------------------
AnnotFileAttachment::AnnotFileAttachment(PDFDoc *docA, const PDFRectangle &rectA, const GooString &filename) : AnnotMarkup(docA, rectA)
{
    type = typeFileAttachment;

    annotObj.dictSet("Subtype", Object::name("FileAttachment"));
    annotObj.dictSet("FS", Object(std::string { filename.toStr() }));

    initialize(annotObj.getDict());
}

AnnotFileAttachment::AnnotFileAttachment(PDFDoc *docA, Object &&dictObject, const Object &obj) : AnnotMarkup(docA, std::move(dictObject), obj)
{
    type = typeFileAttachment;
    initialize(annotObj.getDict());
}

AnnotFileAttachment::~AnnotFileAttachment() = default;

void AnnotFileAttachment::initialize(Dict *dict)
{
    Object objFS = dict->lookup("FS");
    if (objFS.isDict() || objFS.isString()) {
        file = std::move(objFS);
    } else {
        error(errSyntaxError, -1, "Bad Annot File Attachment");
        ok = false;
    }

    Object objName = dict->lookup("Name");
    if (objName.isName()) {
        iconName = std::make_unique<GooString>(objName.getNameString());
    } else {
        iconName = std::make_unique<GooString>("PushPin");
    }
}

#define ANNOT_FILE_ATTACHMENT_AP_PUSHPIN                                                                                                                                                                                                       \
    "4.301 23 m 19.699 23 l 21.523 23 23 21.523 23 19.699 c 23 4.301 l 23\n"                                                                                                                                                                   \
    "2.477 21.523 1 19.699 1 c 4.301 1 l 2.477 1 1 2.477 1 4.301 c 1 19.699\n"                                                                                                                                                                 \
    "l 1 21.523 2.477 23 4.301 23 c h\n"                                                                                                                                                                                                       \
    "4.301 23 m f\n"                                                                                                                                                                                                                           \
    "0.533333 0.541176 0.521569 RG 2 w\n"                                                                                                                                                                                                      \
    "1 J\n"                                                                                                                                                                                                                                    \
    "1 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M 5 4 m 6 5 l S\n"                                                                                                                                                                                                                      \
    "2 w\n"                                                                                                                                                                                                                                    \
    "11 14 m 9 12 l 6 12 l 13 5 l 13 8 l 15 10 l 18 11 l 20 11 l 12 19 l 12\n"                                                                                                                                                                 \
    "17 l 11 14 l h\n"                                                                                                                                                                                                                         \
    "11 14 m S\n"                                                                                                                                                                                                                              \
    "3 w\n"                                                                                                                                                                                                                                    \
    "6 5 m 9 8 l S\n"                                                                                                                                                                                                                          \
    "0.729412 0.741176 0.713725 RG 2 w\n"                                                                                                                                                                                                      \
    "5 5 m 6 6 l S\n"                                                                                                                                                                                                                          \
    "2 w\n"                                                                                                                                                                                                                                    \
    "11 15 m 9 13 l 6 13 l 13 6 l 13 9 l 15 11 l 18 12 l 20 12 l 12 20 l 12\n"                                                                                                                                                                 \
    "18 l 11 15 l h\n"                                                                                                                                                                                                                         \
    "11 15 m S\n"                                                                                                                                                                                                                              \
    "3 w\n"                                                                                                                                                                                                                                    \
    "6 6 m 9 9 l S\n"

#define ANNOT_FILE_ATTACHMENT_AP_PAPERCLIP                                                                                                                                                                                                     \
    "4.301 23 m 19.699 23 l 21.523 23 23 21.523 23 19.699 c 23 4.301 l 23\n"                                                                                                                                                                   \
    "2.477 21.523 1 19.699 1 c 4.301 1 l 2.477 1 1 2.477 1 4.301 c 1 19.699\n"                                                                                                                                                                 \
    "l 1 21.523 2.477 23 4.301 23 c h\n"                                                                                                                                                                                                       \
    "4.301 23 m f\n"                                                                                                                                                                                                                           \
    "0.533333 0.541176 0.521569 RG 2 w\n"                                                                                                                                                                                                      \
    "1 J\n"                                                                                                                                                                                                                                    \
    "1 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M 16.645 12.035 m 12.418 7.707 l 10.902 6.559 6.402 11.203 8.09 12.562 c\n"                                                                                                                                                             \
    "14.133 18.578 l 14.949 19.387 16.867 19.184 17.539 18.465 c 20.551\n"                                                                                                                                                                     \
    "15.23 l 21.191 14.66 21.336 12.887 20.426 12.102 c 13.18 4.824 l 12.18\n"                                                                                                                                                                 \
    "3.82 6.25 2.566 4.324 4.461 c 3 6.395 3.383 11.438 4.711 12.801 c 9.648\n"                                                                                                                                                                \
    "17.887 l S\n"                                                                                                                                                                                                                             \
    "0.729412 0.741176 0.713725 RG 16.645 13.035 m 12.418 8.707 l\n"                                                                                                                                                                           \
    "10.902 7.559 6.402 12.203 8.09 13.562 c\n"                                                                                                                                                                                                \
    "14.133 19.578 l 14.949 20.387 16.867 20.184 17.539 19.465 c 20.551\n"                                                                                                                                                                     \
    "16.23 l 21.191 15.66 21.336 13.887 20.426 13.102 c 13.18 5.824 l 12.18\n"                                                                                                                                                                 \
    "4.82 6.25 3.566 4.324 5.461 c 3 7.395 3.383 12.438 4.711 13.801 c 9.648\n"                                                                                                                                                                \
    "18.887 l S\n"

#define ANNOT_FILE_ATTACHMENT_AP_GRAPH                                                                                                                                                                                                         \
    "4.301 23 m 19.699 23 l 21.523 23 23 21.523 23 19.699 c 23 4.301 l 23\n"                                                                                                                                                                   \
    "2.477 21.523 1 19.699 1 c 4.301 1 l 2.477 1 1 2.477 1 4.301 c 1 19.699\n"                                                                                                                                                                 \
    "l 1 21.523 2.477 23 4.301 23 c h\n"                                                                                                                                                                                                       \
    "4.301 23 m f\n"                                                                                                                                                                                                                           \
    "0.533333 0.541176 0.521569 RG 1 w\n"                                                                                                                                                                                                      \
    "1 J\n"                                                                                                                                                                                                                                    \
    "0 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M 18.5 15.5 m 18.5 13.086 l 16.086 15.5 l 18.5 15.5 l h\n"                                                                                                                                                                              \
    "18.5 15.5 m S\n"                                                                                                                                                                                                                          \
    "7 7 m 10 11 l 13 9 l 18 15 l S\n"                                                                                                                                                                                                         \
    "0.729412 0.741176 0.713725 RG 7 8 m 10 12 l 13 10 l 18 16 l S\n"                                                                                                                                                                          \
    "18.5 16.5 m 18.5 14.086 l 16.086 16.5 l 18.5 16.5 l h\n"                                                                                                                                                                                  \
    "18.5 16.5 m S\n"                                                                                                                                                                                                                          \
    "0.533333 0.541176 0.521569 RG 2 w\n"                                                                                                                                                                                                      \
    "1 j\n"                                                                                                                                                                                                                                    \
    "3 19 m 3 3 l 21 3 l S\n"                                                                                                                                                                                                                  \
    "0.729412 0.741176 0.713725 RG 3 20 m 3 4 l 21 4 l S\n"

#define ANNOT_FILE_ATTACHMENT_AP_TAG                                                                                                                                                                                                           \
    "4.301 23 m 19.699 23 l 21.523 23 23 21.523 23 19.699 c 23 4.301 l 23\n"                                                                                                                                                                   \
    "2.477 21.523 1 19.699 1 c 4.301 1 l 2.477 1 1 2.477 1 4.301 c 1 19.699\n"                                                                                                                                                                 \
    "l 1 21.523 2.477 23 4.301 23 c h\n"                                                                                                                                                                                                       \
    "4.301 23 m f\n"                                                                                                                                                                                                                           \
    "0.533333 0.541176 0.521569 RG 0.999781 w\n"                                                                                                                                                                                               \
    "1 J\n"                                                                                                                                                                                                                                    \
    "1 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M q 1 0 0 -1 0 24 cm\n"                                                                                                                                                                                                                 \
    "8.492 8.707 m 8.492 9.535 7.82 10.207 6.992 10.207 c 6.164 10.207 5.492\n"                                                                                                                                                                \
    "9.535 5.492 8.707 c 5.492 7.879 6.164 7.207 6.992 7.207 c 7.82 7.207\n"                                                                                                                                                                   \
    "8.492 7.879 8.492 8.707 c h\n"                                                                                                                                                                                                            \
    "8.492 8.707 m S Q\n"                                                                                                                                                                                                                      \
    "2 w\n"                                                                                                                                                                                                                                    \
    "20.078 11.414 m 20.891 10.602 20.785 9.293 20.078 8.586 c 14.422 2.93 l\n"                                                                                                                                                                \
    "13.715 2.223 12.301 2.223 11.594 2.93 c 3.816 10.707 l 3.109 11.414\n"                                                                                                                                                                    \
    "2.402 17.781 3.816 19.195 c 5.23 20.609 11.594 19.902 12.301 19.195 c\n"                                                                                                                                                                  \
    "20.078 11.414 l h\n"                                                                                                                                                                                                                      \
    "20.078 11.414 m S\n"                                                                                                                                                                                                                      \
    "0.729412 0.741176 0.713725 RG 20.078 12.414 m\n"                                                                                                                                                                                          \
    "20.891 11.605 20.785 10.293 20.078 9.586 c 14.422 3.93 l\n"                                                                                                                                                                               \
    "13.715 3.223 12.301 3.223 11.594 3.93 c 3.816 11.707 l 3.109 12.414\n"                                                                                                                                                                    \
    "2.402 18.781 3.816 20.195 c 5.23 21.609 11.594 20.902 12.301 20.195 c\n"                                                                                                                                                                  \
    "20.078 12.414 l h\n"                                                                                                                                                                                                                      \
    "20.078 12.414 m S\n"                                                                                                                                                                                                                      \
    "0.533333 0.541176 0.521569 RG 1 w\n"                                                                                                                                                                                                      \
    "0 j\n"                                                                                                                                                                                                                                    \
    "11.949 13.184 m 16.191 8.941 l S\n"                                                                                                                                                                                                       \
    "0.729412 0.741176 0.713725 RG 11.949 14.184 m 16.191 9.941 l S\n"                                                                                                                                                                         \
    "0.533333 0.541176 0.521569 RG 14.07 6.82 m 9.828 11.062 l S\n"                                                                                                                                                                            \
    "0.729412 0.741176 0.713725 RG 14.07 7.82 m 9.828 12.062 l S\n"                                                                                                                                                                            \
    "0.533333 0.541176 0.521569 RG 6.93 15.141 m 8 20 14.27 20.5 16 20.5 c\n"                                                                                                                                                                  \
    "18.094 20.504 19.5 20 19.5 18 c 19.5 16.699 20.91 16.418 22.5 16.5 c S\n"                                                                                                                                                                 \
    "0.729412 0.741176 0.713725 RG 0.999781 w\n"                                                                                                                                                                                               \
    "1 j\n"                                                                                                                                                                                                                                    \
    "q 1 0 0 -1 0 24 cm\n"                                                                                                                                                                                                                     \
    "8.492 7.707 m 8.492 8.535 7.82 9.207 6.992 9.207 c 6.164 9.207 5.492\n"                                                                                                                                                                   \
    "8.535 5.492 7.707 c 5.492 6.879 6.164 6.207 6.992 6.207 c 7.82 6.207\n"                                                                                                                                                                   \
    "8.492 6.879 8.492 7.707 c h\n"                                                                                                                                                                                                            \
    "8.492 7.707 m S Q\n"                                                                                                                                                                                                                      \
    "1 w\n"                                                                                                                                                                                                                                    \
    "0 j\n"                                                                                                                                                                                                                                    \
    "6.93 16.141 m 8 21 14.27 21.5 16 21.5 c 18.094 21.504 19.5 21 19.5 19 c\n"                                                                                                                                                                \
    "19.5 17.699 20.91 17.418 22.5 17.5 c S\n"

void AnnotFileAttachment::draw(Gfx *gfx, bool printing)
{
    double ca = 1;

    if (!isVisible(printing)) {
        return;
    }

    annotLocker();
    if (appearance.isNull()) {
        ca = opacity;

        AnnotAppearanceBuilder appearBuilder;

        appearBuilder.append("q\n");
        if (color) {
            appearBuilder.setDrawColor(*color, true);
        } else {
            appearBuilder.append("1 1 1 rg\n");
        }
        if (!iconName->compare("PushPin")) {
            appearBuilder.append(ANNOT_FILE_ATTACHMENT_AP_PUSHPIN);
        } else if (!iconName->compare("Paperclip")) {
            appearBuilder.append(ANNOT_FILE_ATTACHMENT_AP_PAPERCLIP);
        } else if (!iconName->compare("Graph")) {
            appearBuilder.append(ANNOT_FILE_ATTACHMENT_AP_GRAPH);
        } else if (!iconName->compare("Tag")) {
            appearBuilder.append(ANNOT_FILE_ATTACHMENT_AP_TAG);
        }
        appearBuilder.append("Q\n");

        static constexpr std::array<double, 4> bbox = { 0, 0, 24, 24 };
        if (ca == 1) {
            appearance = createForm(appearBuilder.buffer(), bbox, false, Object {});
        } else {
            Object aStream = createForm(appearBuilder.buffer(), bbox, true, Object {});

            std::string appearBuf("/GS0 gs\n/Fm0 Do");
            std::unique_ptr<Dict> resDict = createResourcesDict("Fm0", std::move(aStream), "GS0", ca, nullptr);
            appearance = createForm(appearBuf, bbox, false, std::move(resDict));
        }
    }

    // draw the appearance stream
    Object obj = appearance.fetch(gfx->getXRef());
    gfx->drawAnnot(&obj, nullptr, color.get(), rect->x1, rect->y1, rect->x2, rect->y2, getRotation());
}

//------------------------------------------------------------------------
// AnnotSound
//------------------------------------------------------------------------
AnnotSound::AnnotSound(PDFDoc *docA, const PDFRectangle &rectA, const Sound &soundA) : AnnotMarkup(docA, rectA)
{
    type = typeSound;

    annotObj.dictSet("Subtype", Object::name("Sound"));
    annotObj.dictSet("Sound", soundA.getObject().copy());

    initialize(annotObj.getDict());
}

AnnotSound::AnnotSound(PDFDoc *docA, Object &&dictObject, const Object &obj) : AnnotMarkup(docA, std::move(dictObject), obj)
{
    type = typeSound;
    initialize(annotObj.getDict());
}

AnnotSound::~AnnotSound() = default;

void AnnotSound::initialize(Dict *dict)
{
    Object obj1 = dict->lookup("Sound");

    sound = Sound::parseSound(obj1);
    if (!sound) {
        error(errSyntaxError, -1, "Bad Annot Sound");
        ok = false;
    }

    obj1 = dict->lookup("Name");
    if (obj1.isName()) {
        iconName = std::make_unique<GooString>(obj1.getNameString());
    } else {
        iconName = std::make_unique<GooString>("Speaker");
    }
}

#define ANNOT_SOUND_AP_SPEAKER                                                                                                                                                                                                                 \
    "4.301 23 m 19.699 23 l 21.523 23 23 21.523 23 19.699 c 23 4.301 l 23\n"                                                                                                                                                                   \
    "2.477 21.523 1 19.699 1 c 4.301 1 l 2.477 1 1 2.477 1 4.301 c 1 19.699\n"                                                                                                                                                                 \
    "l 1 21.523 2.477 23 4.301 23 c h\n"                                                                                                                                                                                                       \
    "4.301 23 m f\n"                                                                                                                                                                                                                           \
    "0.533333 0.541176 0.521569 RG 2 w\n"                                                                                                                                                                                                      \
    "0 J\n"                                                                                                                                                                                                                                    \
    "1 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M 4 14 m 4.086 8.043 l 7 8 l 11 4 l 11 18 l 7 14 l 4 14 l h\n"                                                                                                                                                                          \
    "4 14 m S\n"                                                                                                                                                                                                                               \
    "1 w\n"                                                                                                                                                                                                                                    \
    "1 J\n"                                                                                                                                                                                                                                    \
    "0 j\n"                                                                                                                                                                                                                                    \
    "13.699 15.398 m 14.699 13.398 14.699 9.398 13.699 7.398 c S\n"                                                                                                                                                                            \
    "18.199 19.398 m 21.199 17.398 21.199 5.398 18.199 3.398 c S\n"                                                                                                                                                                            \
    "16 17.398 m 18 16.398 18 7.398 16 5.398 c S\n"                                                                                                                                                                                            \
    "0.729412 0.741176 0.713725 RG 2 w\n"                                                                                                                                                                                                      \
    "0 J\n"                                                                                                                                                                                                                                    \
    "1 j\n"                                                                                                                                                                                                                                    \
    "4 15 m 4.086 9.043 l 7 9 l 11 5 l 11 19 l 7 15 l 4 15 l h\n"                                                                                                                                                                              \
    "4 15 m S\n"                                                                                                                                                                                                                               \
    "1 w\n"                                                                                                                                                                                                                                    \
    "1 J\n"                                                                                                                                                                                                                                    \
    "0 j\n"                                                                                                                                                                                                                                    \
    "13.699 16 m 14.699 14 14.699 10 13.699 8 c S\n"                                                                                                                                                                                           \
    "18.199 20 m 21.199 18 21.199 6 18.199 4 c S\n"                                                                                                                                                                                            \
    "16 18 m 18 17 18 8 16 6 c S\n"

#define ANNOT_SOUND_AP_MIC                                                                                                                                                                                                                     \
    "4.301 23 m 19.699 23 l 21.523 23 23 21.523 23 19.699 c 23 4.301 l 23\n"                                                                                                                                                                   \
    "2.477 21.523 1 19.699 1 c 4.301 1 l 2.477 1 1 2.477 1 4.301 c 1 19.699\n"                                                                                                                                                                 \
    "l 1 21.523 2.477 23 4.301 23 c h\n"                                                                                                                                                                                                       \
    "4.301 23 m f\n"                                                                                                                                                                                                                           \
    "0.533333 0.541176 0.521569 RG 2 w\n"                                                                                                                                                                                                      \
    "1 J\n"                                                                                                                                                                                                                                    \
    "0 j\n"                                                                                                                                                                                                                                    \
    "[] 0.0 d\n"                                                                                                                                                                                                                               \
    "4 M 12 20 m 12 20 l 13.656 20 15 18.656 15 17 c 15 13 l 15 11.344 13.656 10\n"                                                                                                                                                            \
    "12 10 c 12 10 l 10.344 10 9 11.344 9 13 c 9 17 l 9 18.656 10.344 20 12\n"                                                                                                                                                                 \
    "20 c h\n"                                                                                                                                                                                                                                 \
    "12 20 m S\n"                                                                                                                                                                                                                              \
    "1 w\n"                                                                                                                                                                                                                                    \
    "17.5 14.5 m 17.5 11.973 l 17.5 8.941 15.047 6.5 12 6.5 c 8.953 6.5 6.5\n"                                                                                                                                                                 \
    "8.941 6.5 11.973 c 6.5 14.5 l S\n"                                                                                                                                                                                                        \
    "2 w\n"                                                                                                                                                                                                                                    \
    "0 J\n"                                                                                                                                                                                                                                    \
    "12 6.52 m 12 3 l S\n"                                                                                                                                                                                                                     \
    "1 J\n"                                                                                                                                                                                                                                    \
    "8 3 m 16 3 l S\n"                                                                                                                                                                                                                         \
    "0.729412 0.741176 0.713725 RG 12 21 m 12 21 l 13.656 21 15 19.656 15 18 c\n"                                                                                                                                                              \
    "15 14 l 15 12.344 13.656 11 12 11 c 12 11 l 10.344 11 9 12.344 9 14 c\n"                                                                                                                                                                  \
    "9 18 l 9 19.656 10.344 21 12 21 c h\n"                                                                                                                                                                                                    \
    "12 21 m S\n"                                                                                                                                                                                                                              \
    "1 w\n"                                                                                                                                                                                                                                    \
    "17.5 15.5 m 17.5 12.973 l 17.5 9.941 15.047 7.5 12 7.5 c 8.953 7.5 6.5\n"                                                                                                                                                                 \
    "9.941 6.5 12.973 c 6.5 15.5 l S\n"                                                                                                                                                                                                        \
    "2 w\n"                                                                                                                                                                                                                                    \
    "0 J\n"                                                                                                                                                                                                                                    \
    "12 7.52 m 12 4 l S\n"                                                                                                                                                                                                                     \
    "1 J\n"                                                                                                                                                                                                                                    \
    "8 4 m 16 4 l S\n"

void AnnotSound::draw(Gfx *gfx, bool printing)
{
    Object obj;
    double ca = 1;

    if (!isVisible(printing)) {
        return;
    }

    annotLocker();
    if (appearance.isNull()) {
        ca = opacity;

        AnnotAppearanceBuilder appearBuilder;

        appearBuilder.append("q\n");
        if (color) {
            appearBuilder.setDrawColor(*color, true);
        } else {
            appearBuilder.append("1 1 1 rg\n");
        }
        if (!iconName->compare("Speaker")) {
            appearBuilder.append(ANNOT_SOUND_AP_SPEAKER);
        } else if (!iconName->compare("Mic")) {
            appearBuilder.append(ANNOT_SOUND_AP_MIC);
        }
        appearBuilder.append("Q\n");

        static constexpr std::array<double, 4> bbox = { 0, 0, 24, 24 };
        if (ca == 1) {
            appearance = createForm(appearBuilder.buffer(), bbox, false, Object {});
        } else {
            Object aStream = createForm(appearBuilder.buffer(), bbox, true, Object {});

            std::string appearBuf("/GS0 gs\n/Fm0 Do");
            std::unique_ptr<Dict> resDict = createResourcesDict("Fm0", std::move(aStream), "GS0", ca, nullptr);
            appearance = createForm(appearBuf, bbox, false, std::move(resDict));
        }
    }

    // draw the appearance stream
    obj = appearance.fetch(gfx->getXRef());
    gfx->drawAnnot(&obj, nullptr, color.get(), rect->x1, rect->y1, rect->x2, rect->y2, getRotation());
}

//------------------------------------------------------------------------
// Annot3D
//------------------------------------------------------------------------
Annot3D::Annot3D(PDFDoc *docA, const PDFRectangle &rectA) : Annot(docA, rectA)
{
    type = type3D;

    annotObj.dictSet("Subtype", Object::name("3D"));

    initialize(annotObj.getDict());
}

Annot3D::Annot3D(PDFDoc *docA, Object &&dictObject, const Object &obj) : Annot(docA, std::move(dictObject), obj)
{
    type = type3D;
    initialize(annotObj.getDict());
}

Annot3D::~Annot3D() = default;

void Annot3D::initialize(Dict *dict)
{
    Object obj1 = dict->lookup("3DA");
    if (obj1.isDict()) {
        activation = std::make_unique<Activation>(obj1.getDict());
    }
}

Annot3D::Activation::Activation(Dict *dict)
{
    Object obj1;

    obj1 = dict->lookup("A");
    if (obj1.isName()) {
        const std::string &name = obj1.getNameString();

        if (name == "PO") {
            aTrigger = aTriggerPageOpened;
        } else if (name == "PV") {
            aTrigger = aTriggerPageVisible;
        } else if (name == "XA") {
            aTrigger = aTriggerUserAction;
        } else {
            aTrigger = aTriggerUnknown;
        }
    } else {
        aTrigger = aTriggerUnknown;
    }

    obj1 = dict->lookup("AIS");
    if (obj1.isName()) {
        const std::string &name = obj1.getNameString();

        if (name == "I") {
            aState = aStateEnabled;
        } else if (name == "L") {
            aState = aStateDisabled;
        } else {
            aState = aStateUnknown;
        }
    } else {
        aState = aStateUnknown;
    }

    obj1 = dict->lookup("D");
    if (obj1.isName()) {
        const std::string &name = obj1.getNameString();

        if (name == "PC") {
            dTrigger = dTriggerPageClosed;
        } else if (name == "PI") {
            dTrigger = dTriggerPageInvisible;
        } else if (name == "XD") {
            dTrigger = dTriggerUserAction;
        } else {
            dTrigger = dTriggerUnknown;
        }
    } else {
        dTrigger = dTriggerUnknown;
    }

    obj1 = dict->lookup("DIS");
    if (obj1.isName()) {
        const std::string &name = obj1.getNameString();

        if (name == "U") {
            dState = dStateUninstantiaded;
        } else if (name == "I") {
            dState = dStateInstantiated;
        } else if (name == "L") {
            dState = dStateLive;
        } else {
            dState = dStateUnknown;
        }
    } else {
        dState = dStateUnknown;
    }

    displayToolbar = dict->lookup("TB").getBoolWithDefaultValue(true);

    displayNavigation = dict->lookup("NP").getBoolWithDefaultValue(false);
}

//------------------------------------------------------------------------
// AnnotRichMedia
//------------------------------------------------------------------------
AnnotRichMedia::AnnotRichMedia(PDFDoc *docA, const PDFRectangle &rectA) : Annot(docA, rectA)
{
    type = typeRichMedia;

    annotObj.dictSet("Subtype", Object::name("RichMedia"));

    initialize(annotObj.getDict());
}

AnnotRichMedia::AnnotRichMedia(PDFDoc *docA, Object &&dictObject, const Object &obj) : Annot(docA, std::move(dictObject), obj)
{
    type = typeRichMedia;
    initialize(annotObj.getDict());
}

AnnotRichMedia::~AnnotRichMedia() = default;

void AnnotRichMedia::initialize(Dict *dict)
{
    Object obj1 = dict->lookup("RichMediaContent");
    if (obj1.isDict()) {
        content = std::make_unique<AnnotRichMedia::Content>(obj1.getDict());
    }

    obj1 = dict->lookup("RichMediaSettings");
    if (obj1.isDict()) {
        settings = std::make_unique<AnnotRichMedia::Settings>(obj1.getDict());
    }
}

const AnnotRichMedia::Content *AnnotRichMedia::getContent() const
{
    return content.get();
}

const AnnotRichMedia::Settings *AnnotRichMedia::getSettings() const
{
    return settings.get();
}

AnnotRichMedia::Settings::Settings(Dict *dict)
{
    Object obj1 = dict->lookup("Activation");
    if (obj1.isDict()) {
        activation = std::make_unique<AnnotRichMedia::Activation>(obj1.getDict());
    }

    obj1 = dict->lookup("Deactivation");
    if (obj1.isDict()) {
        deactivation = std::make_unique<AnnotRichMedia::Deactivation>(obj1.getDict());
    }
}

AnnotRichMedia::Settings::~Settings() = default;

const AnnotRichMedia::Activation *AnnotRichMedia::Settings::getActivation() const
{
    return activation.get();
}

const AnnotRichMedia::Deactivation *AnnotRichMedia::Settings::getDeactivation() const
{
    return deactivation.get();
}

AnnotRichMedia::Activation::Activation(Dict *dict)
{
    Object obj1 = dict->lookup("Condition");
    if (obj1.isName()) {
        const std::string &name = obj1.getNameString();

        if (name == "PO") {
            condition = conditionPageOpened;
        } else if (name == "PV") {
            condition = conditionPageVisible;
        } else if (name == "XA") {
            condition = conditionUserAction;
        } else {
            condition = conditionUserAction;
        }
    } else {
        condition = conditionUserAction;
    }
}

AnnotRichMedia::Activation::Condition AnnotRichMedia::Activation::getCondition() const
{
    return condition;
}

AnnotRichMedia::Deactivation::Deactivation(Dict *dict)
{
    Object obj1 = dict->lookup("Condition");
    if (obj1.isName()) {
        const std::string &name = obj1.getNameString();

        if (name == "PC") {
            condition = conditionPageClosed;
        } else if (name == "PI") {
            condition = conditionPageInvisible;
        } else if (name == "XD") {
            condition = conditionUserAction;
        } else {
            condition = conditionUserAction;
        }
    } else {
        condition = conditionUserAction;
    }
}

AnnotRichMedia::Deactivation::Condition AnnotRichMedia::Deactivation::getCondition() const
{
    return condition;
}

AnnotRichMedia::Content::Content(Dict *dict)
{
    Object obj1 = dict->lookup("Configurations");
    if (obj1.isArray()) {
        int numberOfConfigurations = obj1.arrayGetLength();
        configurations.reserve(numberOfConfigurations);

        for (int i = 0; i < numberOfConfigurations; ++i) {
            Object obj2 = obj1.arrayGet(i);
            if (obj2.isDict()) {
                configurations.push_back(std::make_unique<AnnotRichMedia::Configuration>(obj2.getDict()));
            } else {
                configurations.emplace_back();
            }
        }
    }

    obj1 = dict->lookup("Assets");
    if (obj1.isDict()) {
        Object obj2 = obj1.getDict()->lookup("Names");
        if (obj2.isArray()) {
            const int length = obj2.arrayGetLength() / 2;
            assets.reserve(length);

            for (int i = 0; i < length; ++i) {
                Object objKey = obj2.arrayGet(2 * i);
                Object objVal = obj2.arrayGet(2 * i + 1);

                if (!objKey.isString() || objVal.isNull()) {
                    error(errSyntaxError, -1, "Bad Annot Asset");
                    continue;
                }

                auto asset = std::make_unique<AnnotRichMedia::Asset>();

                asset->name = objKey.takeString();
                asset->fileSpec = std::move(objVal);
                assets.push_back(std::move(asset));
            }
        }
    }
    assets.shrink_to_fit();
}

AnnotRichMedia::Content::~Content() = default;

AnnotRichMedia::Asset::Asset() = default;

AnnotRichMedia::Asset::~Asset() = default;

const GooString *AnnotRichMedia::Asset::getName() const
{
    return name.get();
}

const Object *AnnotRichMedia::Asset::getFileSpec() const
{
    return &fileSpec;
}

AnnotRichMedia::Configuration::Configuration(Dict *dict)
{
    Object obj1 = dict->lookup("Instances");
    if (obj1.isArray()) {
        int numberOfInstances = obj1.arrayGetLength();
        instances.reserve(numberOfInstances);

        for (int i = 0; i < numberOfInstances; ++i) {
            Object obj2 = obj1.arrayGet(i);
            if (obj2.isDict()) {
                instances.push_back(std::make_unique<AnnotRichMedia::Instance>(obj2.getDict()));
            } else {
                instances.emplace_back();
            }
        }
    }

    obj1 = dict->lookup("Name");
    if (obj1.isString()) {
        name = obj1.takeString();
    }

    obj1 = dict->lookup("Subtype");
    if (obj1.isName()) {
        const std::string &subtypeName = obj1.getNameString();

        if (subtypeName == "3D") {
            type = type3D;
        } else if (subtypeName == "Flash") {
            type = typeFlash;
        } else if (subtypeName == "Sound") {
            type = typeSound;
        } else if (subtypeName == "Video") {
            type = typeVideo;
        } else {
            // determine from first non null instance
            type = typeFlash; // default in case all instances are null
            for (auto &instance : instances) {
                if (instance) {
                    switch (instance->getType()) {
                    case AnnotRichMedia::Instance::type3D:
                        type = type3D;
                        break;
                    case AnnotRichMedia::Instance::typeFlash:
                        type = typeFlash;
                        break;
                    case AnnotRichMedia::Instance::typeSound:
                        type = typeSound;
                        break;
                    case AnnotRichMedia::Instance::typeVideo:
                        type = typeVideo;
                        break;
                    }
                    // break the loop since we found the first non null instance
                    break;
                }
            }
        }
    }
}

AnnotRichMedia::Configuration::~Configuration() = default;

const GooString *AnnotRichMedia::Configuration::getName() const
{
    return name.get();
}

AnnotRichMedia::Configuration::Type AnnotRichMedia::Configuration::getType() const
{
    return type;
}

AnnotRichMedia::Instance::Instance(Dict *dict)
{
    Object obj1 = dict->lookup("Subtype");
    const std::string name = obj1.isName() ? obj1.getNameString() : "";

    if (name == "3D") {
        type = type3D;
    } else if (name == "Flash") {
        type = typeFlash;
    } else if (name == "Sound") {
        type = typeSound;
    } else if (name == "Video") {
        type = typeVideo;
    } else {
        type = typeFlash;
    }

    obj1 = dict->lookup("Params");
    if (obj1.isDict()) {
        params = std::make_unique<AnnotRichMedia::Params>(obj1.getDict());
    }
}

AnnotRichMedia::Instance::~Instance() = default;

AnnotRichMedia::Instance::Type AnnotRichMedia::Instance::getType() const
{
    return type;
}

const AnnotRichMedia::Params *AnnotRichMedia::Instance::getParams() const
{
    return params.get();
}

AnnotRichMedia::Params::Params(Dict *dict)
{
    Object obj1 = dict->lookup("FlashVars");
    if (obj1.isString()) {
        flashVars = obj1.takeString();
    }
}

AnnotRichMedia::Params::~Params() = default;

const GooString *AnnotRichMedia::Params::getFlashVars() const
{
    return flashVars.get();
}

//------------------------------------------------------------------------
// Annots
//------------------------------------------------------------------------

Annots::Annots(PDFDoc *docA, int page, Object *annotsObj)
{
    doc = docA;

    if (annotsObj->isArray()) {
        Array *annotsArray = annotsObj->getArray();
        for (int i = 0; i < annotsArray->getLength(); ++i) {
            // get the Ref to this annot and pass it to Annot constructor
            // this way, it'll be possible for the annot to retrieve the corresponding
            // form widget
            Object obj1 = annotsArray->get(i);
            if (obj1.isDict()) {
                const Object &obj2 = annotsArray->getNF(i);
                std::shared_ptr<Annot> annot = createAnnot(std::move(obj1), obj2);
                if (annot) {
                    if (annot.use_count() > 100000) {
                        error(errSyntaxError, -1, "Annotations likely malformed. Too many references. Stopping processing annots on page {0:d}", page);
                        break;
                    }
                    if (annot->isOk()) {
                        annot->setPage(page, false); // Don't change /P
                        appendAnnot(annot);
                    }
                }
            }
        }
    }
}

void Annots::appendAnnot(std::shared_ptr<Annot> annot)
{
    if (annot && annot->isOk()) {
        annots.push_back(std::move(annot));
    }
}

bool Annots::removeAnnot(const std::shared_ptr<Annot> &annot)
{
    auto idx = std::ranges::find(annots, annot);

    if (idx == annots.end()) {
        return false;
    }
    annots.erase(idx);
    return true;
}

std::shared_ptr<Annot> Annots::createAnnot(Object &&dictObject, const Object &obj)
{
    std::shared_ptr<Annot> annot = nullptr;
    Object obj1 = dictObject.dictLookup("Subtype");
    if (obj1.isName()) {
        const std::string &typeName = obj1.getNameString();

        if (typeName == "Text") {
            annot = std::make_shared<AnnotText>(doc, std::move(dictObject), obj);
        } else if (typeName == "Link") {
            annot = std::make_shared<AnnotLink>(doc, std::move(dictObject), obj);
        } else if (typeName == "FreeText") {
            annot = std::make_shared<AnnotFreeText>(doc, std::move(dictObject), obj);
        } else if (typeName == "Line") {
            annot = std::make_shared<AnnotLine>(doc, std::move(dictObject), obj);
        } else if (typeName == "Square") {
            annot = std::make_shared<AnnotGeometry>(doc, std::move(dictObject), obj);
        } else if (typeName == "Circle") {
            annot = std::make_shared<AnnotGeometry>(doc, std::move(dictObject), obj);
        } else if (typeName == "Polygon") {
            annot = std::make_shared<AnnotPolygon>(doc, std::move(dictObject), obj);
        } else if (typeName == "PolyLine") {
            annot = std::make_shared<AnnotPolygon>(doc, std::move(dictObject), obj);
        } else if (typeName == "Highlight") {
            annot = std::make_shared<AnnotTextMarkup>(doc, std::move(dictObject), obj);
        } else if (typeName == "Underline") {
            annot = std::make_shared<AnnotTextMarkup>(doc, std::move(dictObject), obj);
        } else if (typeName == "Squiggly") {
            annot = std::make_shared<AnnotTextMarkup>(doc, std::move(dictObject), obj);
        } else if (typeName == "StrikeOut") {
            annot = std::make_shared<AnnotTextMarkup>(doc, std::move(dictObject), obj);
        } else if (typeName == "Stamp") {
            annot = std::make_shared<AnnotStamp>(doc, std::move(dictObject), obj);
        } else if (typeName == "Caret") {
            annot = std::make_shared<AnnotCaret>(doc, std::move(dictObject), obj);
        } else if (typeName == "Ink") {
            annot = std::make_shared<AnnotInk>(doc, std::move(dictObject), obj);
        } else if (typeName == "FileAttachment") {
            annot = std::make_shared<AnnotFileAttachment>(doc, std::move(dictObject), obj);
        } else if (typeName == "Sound") {
            annot = std::make_shared<AnnotSound>(doc, std::move(dictObject), obj);
        } else if (typeName == "Movie") {
            annot = std::make_shared<AnnotMovie>(doc, std::move(dictObject), obj);
        } else if (typeName == "Widget") {
            // Find the annot in forms
            if (obj.isRef()) {
                Form *form = doc->getCatalog()->getForm();
                if (form) {
                    FormWidget *widget = form->findWidgetByRef(obj.getRef());
                    if (widget) {
                        annot = widget->getWidgetAnnotation();
                    }
                }
            }
            if (!annot) {
                annot = std::make_shared<AnnotWidget>(doc, std::move(dictObject), obj);
            }
        } else if (typeName == "Screen") {
            annot = std::make_shared<AnnotScreen>(doc, std::move(dictObject), obj);
        } else if (typeName == "PrinterMark") {
            annot = std::make_shared<Annot>(doc, std::move(dictObject), obj);
        } else if (typeName == "TrapNet") {
            annot = std::make_shared<Annot>(doc, std::move(dictObject), obj);
        } else if (typeName == "Watermark") {
            annot = std::make_shared<Annot>(doc, std::move(dictObject), obj);
        } else if (typeName == "3D") {
            annot = std::make_shared<Annot3D>(doc, std::move(dictObject), obj);
        } else if (typeName == "RichMedia") {
            annot = std::make_shared<AnnotRichMedia>(doc, std::move(dictObject), obj);
        } else if (typeName == "Popup") {
            /* Popup annots are already handled by markup annots
             * Here we only care about popup annots without a
             * markup annotation associated
             */
            Object obj2 = dictObject.dictLookup("Parent");
            if (obj2.isNull()) {
                annot = std::make_shared<AnnotPopup>(doc, std::move(dictObject), obj);
            } else {
                annot = nullptr;
            }
        } else {
            annot = std::make_shared<Annot>(doc, std::move(dictObject), obj);
        }
    }

    return annot;
}

std::shared_ptr<Annot> Annots::findAnnot(Ref ref)
{
    for (const auto &annot : annots) {
        if (annot->match(ref)) {
            return annot;
        }
    }
    return nullptr;
}

Annots::~Annots() = default;

//------------------------------------------------------------------------
// AnnotAppearanceBuilder
//------------------------------------------------------------------------

AnnotAppearanceBuilder::AnnotAppearanceBuilder()
{
    addedDingbatsResource = false;
}

AnnotAppearanceBuilder::~AnnotAppearanceBuilder() = default;

void AnnotAppearanceBuilder::append(const char *text)
{
    if (text) {
        appearBuf.append(text);
    }
}

void AnnotAppearanceBuilder::appendf(const char *fmt, ...) GOOSTRING_FORMAT
{
    va_list argList;

    va_start(argList, fmt);
    GooString::appendfv(appearBuf, fmt, argList);
    va_end(argList);
}

const std::string &AnnotAppearanceBuilder::buffer() const
{
    return appearBuf;
}
