//    Copyright (C) 2019-2020 Jakub Melka
//
//    This file is part of PdfForQt.
//
//    PdfForQt is free software: you can redistribute it and/or modify
//    it under the terms of the GNU Lesser General Public License as published by
//    the Free Software Foundation, either version 3 of the License, or
//    (at your option) any later version.
//
//    PdfForQt is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU Lesser General Public License for more details.
//
//    You should have received a copy of the GNU Lesser General Public License
//    along with PDFForQt.  If not, see <https://www.gnu.org/licenses/>.

#include "pdfviewersettingsdialog.h"
#include "ui_pdfviewersettingsdialog.h"

#include "pdfglobal.h"
#include "pdfutils.h"
#include "pdfrecentfilemanager.h"

#include <QAction>
#include <QLineEdit>
#include <QMessageBox>
#include <QFileDialog>
#include <QListWidgetItem>
#include <QTextToSpeech>

namespace pdfviewer
{

PDFViewerSettingsDialog::PDFViewerSettingsDialog(const PDFViewerSettings::Settings& settings,
                                                 const pdf::PDFCMSSettings& cmsSettings,
                                                 const OtherSettings& otherSettings,
                                                 QList<QAction*> actions,
                                                 pdf::PDFCMSManager* cmsManager, QWidget *parent) :
    QDialog(parent),
    ui(new Ui::PDFViewerSettingsDialog),
    m_settings(settings),
    m_cmsSettings(cmsSettings),
    m_otherSettings(otherSettings),
    m_actions(),
    m_isLoadingData(false)
{
    ui->setupUi(this);

    m_textToSpeechEngines = QTextToSpeech::availableEngines();

    new QListWidgetItem(QIcon(":/resources/engine.svg"), tr("Engine"), ui->optionsPagesWidget, EngineSettings);
    new QListWidgetItem(QIcon(":/resources/rendering.svg"), tr("Rendering"), ui->optionsPagesWidget, RenderingSettings);
    new QListWidgetItem(QIcon(":/resources/shading.svg"), tr("Shading"), ui->optionsPagesWidget, ShadingSettings);
    new QListWidgetItem(QIcon(":/resources/cache.svg"), tr("Cache"), ui->optionsPagesWidget, CacheSettings);
    new QListWidgetItem(QIcon(":/resources/shortcuts.svg"), tr("Shortcuts"), ui->optionsPagesWidget, ShortcutSettings);
    new QListWidgetItem(QIcon(":/resources/cms.svg"), tr("Colors"), ui->optionsPagesWidget, ColorManagementSystemSettings);
    new QListWidgetItem(QIcon(":/resources/security.svg"), tr("Security"), ui->optionsPagesWidget, SecuritySettings);
    new QListWidgetItem(QIcon(":/resources/ui.svg"), tr("UI"), ui->optionsPagesWidget, UISettings);
    new QListWidgetItem(QIcon(":/resources/speech.svg"), tr("Speech"), ui->optionsPagesWidget, SpeechSettings);

    ui->renderingEngineComboBox->addItem(tr("Software"), static_cast<int>(pdf::RendererEngine::Software));
    ui->renderingEngineComboBox->addItem(tr("Hardware accelerated (OpenGL)"), static_cast<int>(pdf::RendererEngine::OpenGL));

    for (int i : { 1, 2, 4, 8, 16 })
    {
        ui->multisampleAntialiasingSamplesCountComboBox->addItem(QString::number(i), i);
    }

    ui->multithreadingComboBox->addItem(tr("Single thread"), static_cast<int>(pdf::PDFExecutionPolicy::Strategy::SingleThreaded));
    ui->multithreadingComboBox->addItem(tr("Multithreading (load balanced)"), static_cast<int>(pdf::PDFExecutionPolicy::Strategy::PageMultithreaded));
    ui->multithreadingComboBox->addItem(tr("Multithreading (maximum threads)"), static_cast<int>(pdf::PDFExecutionPolicy::Strategy::AlwaysMultithreaded));

    ui->maximumRecentFileCountEdit->setMinimum(PDFRecentFileManager::getMinimumRecentFiles());
    ui->maximumRecentFileCountEdit->setMaximum(PDFRecentFileManager::getMaximumRecentFiles());

    // Load CMS data
    ui->cmsTypeComboBox->addItem(pdf::PDFCMSManager::getSystemName(pdf::PDFCMSSettings::System::Generic), int(pdf::PDFCMSSettings::System::Generic));
    ui->cmsTypeComboBox->addItem(pdf::PDFCMSManager::getSystemName(pdf::PDFCMSSettings::System::LittleCMS2), int(pdf::PDFCMSSettings::System::LittleCMS2));

    ui->cmsRenderingIntentComboBox->addItem(tr("Auto"), int(pdf::RenderingIntent::Auto));
    ui->cmsRenderingIntentComboBox->addItem(tr("Perceptual"), int(pdf::RenderingIntent::Perceptual));
    ui->cmsRenderingIntentComboBox->addItem(tr("Relative colorimetric"), int(pdf::RenderingIntent::RelativeColorimetric));
    ui->cmsRenderingIntentComboBox->addItem(tr("Absolute colorimetric"), int(pdf::RenderingIntent::AbsoluteColorimetric));
    ui->cmsRenderingIntentComboBox->addItem(tr("Saturation"), int(pdf::RenderingIntent::Saturation));

    ui->cmsAccuracyComboBox->addItem(tr("Low"), int(pdf::PDFCMSSettings::Accuracy::Low));
    ui->cmsAccuracyComboBox->addItem(tr("Medium"), int(pdf::PDFCMSSettings::Accuracy::Medium));
    ui->cmsAccuracyComboBox->addItem(tr("High"), int(pdf::PDFCMSSettings::Accuracy::High));

    auto fillColorProfileList = [](QComboBox* comboBox, const pdf::PDFColorProfileIdentifiers& identifiers)
    {
        for (const pdf::PDFColorProfileIdentifier& identifier : identifiers)
        {
            comboBox->addItem(identifier.name, identifier.id);
        }
    };
    fillColorProfileList(ui->cmsOutputColorProfileComboBox, cmsManager->getOutputProfiles());
    fillColorProfileList(ui->cmsDeviceGrayColorProfileComboBox, cmsManager->getGrayProfiles());
    fillColorProfileList(ui->cmsDeviceRGBColorProfileComboBox, cmsManager->getRGBProfiles());
    fillColorProfileList(ui->cmsDeviceCMYKColorProfileComboBox, cmsManager->getCMYKProfiles());

    for (QWidget* widget : { ui->engineInfoLabel, ui->renderingInfoLabel, ui->securityInfoLabel, ui->cmsInfoLabel })
    {
        widget->setMinimumWidth(widget->sizeHint().width());
    }

    for (QCheckBox* checkBox : findChildren<QCheckBox*>())
    {
        connect(checkBox, &QCheckBox::clicked, this, &PDFViewerSettingsDialog::saveData);
    }
    for (QComboBox* comboBox : findChildren<QComboBox*>())
    {
        connect(comboBox, QOverload<int>::of(&QComboBox::currentIndexChanged), this, &PDFViewerSettingsDialog::saveData);
    }
    for (QDoubleSpinBox* spinBox : findChildren<QDoubleSpinBox*>())
    {
        connect(spinBox, QOverload<double>::of(&QDoubleSpinBox::valueChanged), this, &PDFViewerSettingsDialog::saveData);
    }
    for (QSpinBox* spinBox : findChildren<QSpinBox*>())
    {
        connect(spinBox, QOverload<int>::of(&QSpinBox::valueChanged), this, &PDFViewerSettingsDialog::saveData);
    }
    for (QLineEdit* lineEdit : findChildren<QLineEdit*>())
    {
        connect(lineEdit, &QLineEdit::editingFinished, this, &PDFViewerSettingsDialog::saveData);
    }

    for (QAction* action : actions)
    {
        if (!action->objectName().isEmpty())
        {
            m_actions.append(action);
        }
    }

    // Text to speech
    for (const QString& engine : m_textToSpeechEngines)
    {
        ui->speechEnginesComboBox->addItem(engine, engine);
    }

    ui->optionsPagesWidget->setCurrentRow(0);
    adjustSize();
    loadData();
    loadActionShortcutsTable();
}

PDFViewerSettingsDialog::~PDFViewerSettingsDialog()
{
    delete ui;
}

void PDFViewerSettingsDialog::on_optionsPagesWidget_currentItemChanged(QListWidgetItem* current, QListWidgetItem* previous)
{
    Q_UNUSED(previous);

    switch (current->type())
    {
        case EngineSettings:
            ui->stackedWidget->setCurrentWidget(ui->enginePage);
            break;

        case RenderingSettings:
            ui->stackedWidget->setCurrentWidget(ui->renderingPage);
            break;

        case ShadingSettings:
            ui->stackedWidget->setCurrentWidget(ui->shadingPage);
            break;

        case CacheSettings:
            ui->stackedWidget->setCurrentWidget(ui->cachePage);
            break;

        case ShortcutSettings:
            ui->stackedWidget->setCurrentWidget(ui->shortcutsPage);
            break;

        case ColorManagementSystemSettings:
            ui->stackedWidget->setCurrentWidget(ui->cmsPage);
            break;

        case SecuritySettings:
            ui->stackedWidget->setCurrentWidget(ui->securityPage);
            break;

        case UISettings:
            ui->stackedWidget->setCurrentWidget(ui->uiPage);
            break;

        case SpeechSettings:
            ui->stackedWidget->setCurrentWidget(ui->speechPage);
            break;

        default:
            Q_ASSERT(false);
            break;
    }
}

void PDFViewerSettingsDialog::loadData()
{
    pdf::PDFTemporaryValueChange guard(&m_isLoadingData, true);
    ui->renderingEngineComboBox->setCurrentIndex(ui->renderingEngineComboBox->findData(static_cast<int>(m_settings.m_rendererEngine)));

    // Engine
    if (m_settings.m_rendererEngine == pdf::RendererEngine::OpenGL)
    {
        ui->multisampleAntialiasingCheckBox->setEnabled(true);
        ui->multisampleAntialiasingCheckBox->setChecked(m_settings.m_multisampleAntialiasing);

        if (m_settings.m_multisampleAntialiasing)
        {
            ui->multisampleAntialiasingSamplesCountComboBox->setEnabled(true);
            ui->multisampleAntialiasingSamplesCountComboBox->setCurrentIndex(ui->multisampleAntialiasingSamplesCountComboBox->findData(m_settings.m_rendererSamples));
        }
        else
        {
            ui->multisampleAntialiasingSamplesCountComboBox->setEnabled(false);
            ui->multisampleAntialiasingSamplesCountComboBox->setCurrentIndex(-1);
        }
    }
    else
    {
        ui->multisampleAntialiasingCheckBox->setEnabled(false);
        ui->multisampleAntialiasingCheckBox->setChecked(false);
        ui->multisampleAntialiasingSamplesCountComboBox->setEnabled(false);
        ui->multisampleAntialiasingSamplesCountComboBox->setCurrentIndex(-1);
    }
    ui->prefetchPagesCheckBox->setChecked(m_settings.m_prefetchPages);
    ui->multithreadingComboBox->setCurrentIndex(ui->multithreadingComboBox->findData(static_cast<int>(m_settings.m_multithreadingStrategy)));

    // Rendering
    ui->antialiasingCheckBox->setChecked(m_settings.m_features.testFlag(pdf::PDFRenderer::Antialiasing));
    ui->textAntialiasingCheckBox->setChecked(m_settings.m_features.testFlag(pdf::PDFRenderer::TextAntialiasing));
    ui->smoothPicturesCheckBox->setChecked(m_settings.m_features.testFlag(pdf::PDFRenderer::SmoothImages));
    ui->ignoreOptionalContentCheckBox->setChecked(m_settings.m_features.testFlag(pdf::PDFRenderer::IgnoreOptionalContent));
    ui->clipToCropBoxCheckBox->setChecked(m_settings.m_features.testFlag(pdf::PDFRenderer::ClipToCropBox));
    ui->displayTimeCheckBox->setChecked(m_settings.m_features.testFlag(pdf::PDFRenderer::DisplayTimes));
    ui->displayAnnotationsCheckBox->setChecked(m_settings.m_features.testFlag(pdf::PDFRenderer::DisplayAnnotations));

    // Shading
    ui->preferredMeshResolutionEdit->setValue(m_settings.m_preferredMeshResolutionRatio);
    ui->minimalMeshResolutionEdit->setValue(m_settings.m_minimalMeshResolutionRatio);
    ui->colorToleranceEdit->setValue(m_settings.m_colorTolerance);

    // Cache
    ui->compiledPageCacheSizeEdit->setValue(m_settings.m_compiledPageCacheLimit);
    ui->thumbnailCacheSizeEdit->setValue(m_settings.m_thumbnailsCacheLimit);
    ui->cachedFontLimitEdit->setValue(m_settings.m_fontCacheLimit);
    ui->cachedInstancedFontLimitEdit->setValue(m_settings.m_instancedFontCacheLimit);

    // Security
    ui->allowLaunchCheckBox->setChecked(m_settings.m_allowLaunchApplications);
    ui->allowRunURICheckBox->setChecked(m_settings.m_allowLaunchURI);

    // UI
    ui->maximumRecentFileCountEdit->setValue(m_otherSettings.maximumRecentFileCount);
    ui->magnifierSizeEdit->setValue(m_settings.m_magnifierSize);
    ui->magnifierZoomEdit->setValue(m_settings.m_magnifierZoom);

    // CMS
    ui->cmsTypeComboBox->setCurrentIndex(ui->cmsTypeComboBox->findData(int(m_cmsSettings.system)));
    if (m_cmsSettings.system != pdf::PDFCMSSettings::System::Generic)
    {
        ui->cmsRenderingIntentComboBox->setEnabled(true);
        ui->cmsRenderingIntentComboBox->setCurrentIndex(ui->cmsRenderingIntentComboBox->findData(int(m_cmsSettings.intent)));
        ui->cmsAccuracyComboBox->setEnabled(true);
        ui->cmsAccuracyComboBox->setCurrentIndex(ui->cmsAccuracyComboBox->findData(int(m_cmsSettings.accuracy)));
        ui->cmsIsBlackPointCompensationCheckBox->setEnabled(true);
        ui->cmsIsBlackPointCompensationCheckBox->setChecked(m_cmsSettings.isBlackPointCompensationActive);
        ui->cmsWhitePaperColorTransformedCheckBox->setEnabled(true);
        ui->cmsWhitePaperColorTransformedCheckBox->setChecked(m_cmsSettings.isWhitePaperColorTransformed);
        ui->cmsOutputColorProfileComboBox->setEnabled(true);
        ui->cmsOutputColorProfileComboBox->setCurrentIndex(ui->cmsOutputColorProfileComboBox->findData(m_cmsSettings.outputCS));
        ui->cmsDeviceGrayColorProfileComboBox->setEnabled(true);
        ui->cmsDeviceGrayColorProfileComboBox->setCurrentIndex(ui->cmsDeviceGrayColorProfileComboBox->findData(m_cmsSettings.deviceGray));
        ui->cmsDeviceRGBColorProfileComboBox->setEnabled(true);
        ui->cmsDeviceRGBColorProfileComboBox->setCurrentIndex(ui->cmsDeviceRGBColorProfileComboBox->findData(m_cmsSettings.deviceRGB));
        ui->cmsDeviceCMYKColorProfileComboBox->setEnabled(true);
        ui->cmsDeviceCMYKColorProfileComboBox->setCurrentIndex(ui->cmsDeviceCMYKColorProfileComboBox->findData(m_cmsSettings.deviceCMYK));
        ui->cmsProfileDirectoryButton->setEnabled(true);
        ui->cmsProfileDirectoryEdit->setEnabled(true);
        ui->cmsProfileDirectoryEdit->setText(m_cmsSettings.profileDirectory);
    }
    else
    {
        ui->cmsRenderingIntentComboBox->setEnabled(false);
        ui->cmsRenderingIntentComboBox->setCurrentIndex(-1);
        ui->cmsAccuracyComboBox->setEnabled(false);
        ui->cmsAccuracyComboBox->setCurrentIndex(-1);
        ui->cmsIsBlackPointCompensationCheckBox->setEnabled(false);
        ui->cmsIsBlackPointCompensationCheckBox->setChecked(false);
        ui->cmsWhitePaperColorTransformedCheckBox->setEnabled(false);
        ui->cmsWhitePaperColorTransformedCheckBox->setChecked(false);
        ui->cmsOutputColorProfileComboBox->setEnabled(false);
        ui->cmsOutputColorProfileComboBox->setCurrentIndex(-1);
        ui->cmsDeviceGrayColorProfileComboBox->setEnabled(false);
        ui->cmsDeviceGrayColorProfileComboBox->setCurrentIndex(-1);
        ui->cmsDeviceRGBColorProfileComboBox->setEnabled(false);
        ui->cmsDeviceRGBColorProfileComboBox->setCurrentIndex(-1);
        ui->cmsDeviceCMYKColorProfileComboBox->setEnabled(false);
        ui->cmsDeviceCMYKColorProfileComboBox->setCurrentIndex(-1);
        ui->cmsProfileDirectoryButton->setEnabled(false);
        ui->cmsProfileDirectoryEdit->setEnabled(false);
        ui->cmsProfileDirectoryEdit->setText(QString());
    }

    // Text-to-speech
    ui->speechEnginesComboBox->setCurrentIndex(ui->speechEnginesComboBox->findData(m_settings.m_speechEngine));
    QString speechEngine = ui->speechEnginesComboBox->currentData().toString();
    setSpeechEngine(speechEngine);
    ui->speechLocaleComboBox->setCurrentIndex(ui->speechLocaleComboBox->findData(m_settings.m_speechLocale));
    ui->speechVoiceComboBox->setCurrentIndex(ui->speechVoiceComboBox->findData(m_settings.m_speechVoice));
    ui->speechRateEdit->setValue(m_settings.m_speechRate);
    ui->speechPitchEdit->setValue(m_settings.m_speechPitch);
    ui->speechVolumeEdit->setValue(m_settings.m_speechVolume);
}

void PDFViewerSettingsDialog::saveData()
{
    if (m_isLoadingData)
    {
        return;
    }

    QObject* sender = this->sender();

    if (sender == ui->renderingEngineComboBox)
    {
        m_settings.m_rendererEngine = static_cast<pdf::RendererEngine>(ui->renderingEngineComboBox->currentData().toInt());
    }
    else if (sender == ui->multisampleAntialiasingCheckBox)
    {
        m_settings.m_multisampleAntialiasing = ui->multisampleAntialiasingCheckBox->isChecked();
    }
    else if (sender == ui->multisampleAntialiasingSamplesCountComboBox)
    {
        m_settings.m_rendererSamples = ui->multisampleAntialiasingSamplesCountComboBox->currentData().toInt();
    }
    else if (sender == ui->prefetchPagesCheckBox)
    {
        m_settings.m_prefetchPages = ui->prefetchPagesCheckBox->isChecked();
    }
    else if (sender == ui->antialiasingCheckBox)
    {
        m_settings.m_features.setFlag(pdf::PDFRenderer::Antialiasing, ui->antialiasingCheckBox->isChecked());
    }
    else if (sender == ui->textAntialiasingCheckBox)
    {
        m_settings.m_features.setFlag(pdf::PDFRenderer::TextAntialiasing, ui->textAntialiasingCheckBox->isChecked());
    }
    else if (sender == ui->smoothPicturesCheckBox)
    {
        m_settings.m_features.setFlag(pdf::PDFRenderer::SmoothImages, ui->smoothPicturesCheckBox->isChecked());
    }
    else if (sender == ui->ignoreOptionalContentCheckBox)
    {
        m_settings.m_features.setFlag(pdf::PDFRenderer::IgnoreOptionalContent, ui->ignoreOptionalContentCheckBox->isChecked());
    }
    else if (sender == ui->displayAnnotationsCheckBox)
    {
        m_settings.m_features.setFlag(pdf::PDFRenderer::DisplayAnnotations, ui->displayAnnotationsCheckBox->isChecked());
    }
    else if (sender == ui->clipToCropBoxCheckBox)
    {
        m_settings.m_features.setFlag(pdf::PDFRenderer::ClipToCropBox, ui->clipToCropBoxCheckBox->isChecked());
    }
    else if (sender == ui->displayTimeCheckBox)
    {
        m_settings.m_features.setFlag(pdf::PDFRenderer::DisplayTimes, ui->displayTimeCheckBox->isChecked());
    }
    else if (sender == ui->preferredMeshResolutionEdit)
    {
        m_settings.m_preferredMeshResolutionRatio = ui->preferredMeshResolutionEdit->value();
    }
    else if (sender == ui->minimalMeshResolutionEdit)
    {
        m_settings.m_minimalMeshResolutionRatio = ui->minimalMeshResolutionEdit->value();
    }
    else if (sender == ui->colorToleranceEdit)
    {
        m_settings.m_colorTolerance = ui->colorToleranceEdit->value();
    }
    else if (sender == ui->allowLaunchCheckBox)
    {
        m_settings.m_allowLaunchApplications = ui->allowLaunchCheckBox->isChecked();
    }
    else if (sender == ui->allowRunURICheckBox)
    {
        m_settings.m_allowLaunchURI = ui->allowRunURICheckBox->isChecked();
    }
    else if (sender == ui->compiledPageCacheSizeEdit)
    {
        m_settings.m_compiledPageCacheLimit = ui->compiledPageCacheSizeEdit->value();
    }
    else if (sender == ui->thumbnailCacheSizeEdit)
    {
        m_settings.m_thumbnailsCacheLimit = ui->thumbnailCacheSizeEdit->value();
    }
    else if (sender == ui->cachedFontLimitEdit)
    {
        m_settings.m_fontCacheLimit = ui->cachedFontLimitEdit->value();
    }
    else if (sender == ui->cachedInstancedFontLimitEdit)
    {
        m_settings.m_instancedFontCacheLimit = ui->cachedInstancedFontLimitEdit->value();
    }
    else if (sender == ui->cmsTypeComboBox)
    {
        m_cmsSettings.system = static_cast<pdf::PDFCMSSettings::System>(ui->cmsTypeComboBox->currentData().toInt());
    }
    else if (sender == ui->cmsRenderingIntentComboBox)
    {
        m_cmsSettings.intent = static_cast<pdf::RenderingIntent>(ui->cmsRenderingIntentComboBox->currentData().toInt());
    }
    else if (sender == ui->cmsAccuracyComboBox)
    {
        m_cmsSettings.accuracy = static_cast<pdf::PDFCMSSettings::Accuracy>(ui->cmsAccuracyComboBox->currentData().toInt());
    }
    else if (sender == ui->cmsIsBlackPointCompensationCheckBox)
    {
        m_cmsSettings.isBlackPointCompensationActive = ui->cmsIsBlackPointCompensationCheckBox->isChecked();
    }
    else if (sender == ui->cmsWhitePaperColorTransformedCheckBox)
    {
        m_cmsSettings.isWhitePaperColorTransformed = ui->cmsWhitePaperColorTransformedCheckBox->isChecked();
    }
    else if (sender == ui->cmsOutputColorProfileComboBox)
    {
        m_cmsSettings.outputCS = ui->cmsOutputColorProfileComboBox->currentData().toString();
    }
    else if (sender == ui->cmsDeviceGrayColorProfileComboBox)
    {
        m_cmsSettings.deviceGray = ui->cmsDeviceGrayColorProfileComboBox->currentData().toString();
    }
    else if (sender == ui->cmsDeviceRGBColorProfileComboBox)
    {
        m_cmsSettings.deviceRGB = ui->cmsDeviceRGBColorProfileComboBox->currentData().toString();
    }
    else if (sender == ui->cmsDeviceCMYKColorProfileComboBox)
    {
        m_cmsSettings.deviceCMYK = ui->cmsDeviceCMYKColorProfileComboBox->currentData().toString();
    }
    else if (sender == ui->cmsProfileDirectoryEdit)
    {
        m_cmsSettings.profileDirectory = ui->cmsProfileDirectoryEdit->text();
    }
    else if (sender == ui->multithreadingComboBox)
    {
        m_settings.m_multithreadingStrategy = static_cast<pdf::PDFExecutionPolicy::Strategy>(ui->multithreadingComboBox->currentData().toInt());
    }
    else if (sender == ui->maximumRecentFileCountEdit)
    {
        m_otherSettings.maximumRecentFileCount = ui->maximumRecentFileCountEdit->value();
    }
    else if (sender == ui->speechEnginesComboBox)
    {
        m_settings.m_speechEngine = ui->speechEnginesComboBox->currentData().toString();
    }
    else if (sender == ui->speechLocaleComboBox)
    {
        m_settings.m_speechLocale = ui->speechLocaleComboBox->currentData().toString();
    }
    else if (sender == ui->speechVoiceComboBox)
    {
        m_settings.m_speechVoice = ui->speechVoiceComboBox->currentData().toString();
    }
    else if (sender == ui->speechRateEdit)
    {
        m_settings.m_speechRate = ui->speechRateEdit->value();
    }
    else if (sender == ui->speechPitchEdit)
    {
        m_settings.m_speechPitch = ui->speechPitchEdit->value();
    }
    else if (sender == ui->speechVolumeEdit)
    {
        m_settings.m_speechVolume = ui->speechVolumeEdit->value();
    }
    else if (sender == ui->magnifierSizeEdit)
    {
        m_settings.m_magnifierSize = ui->magnifierSizeEdit->value();
    }
    else if (sender == ui->magnifierZoomEdit)
    {
        m_settings.m_magnifierZoom = ui->magnifierZoomEdit->value();
    }

    const bool loadData = !qobject_cast<const QDoubleSpinBox*>(sender) && !qobject_cast<const QSpinBox*>(sender);
    if (loadData)
    {
        this->loadData();
    }
}

void PDFViewerSettingsDialog::loadActionShortcutsTable()
{
    ui->shortcutsTableWidget->setRowCount(m_actions.size());
    ui->shortcutsTableWidget->setColumnCount(2);
    ui->shortcutsTableWidget->setHorizontalHeaderLabels({ tr("Action"), tr("Shortcut")});
    ui->shortcutsTableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);

    for (int i = 0; i < m_actions.size(); ++i)
    {
        QAction* action = m_actions[i];

        // Action name and icon
        QTableWidgetItem* actionItem = new QTableWidgetItem(action->icon(), action->text());
        actionItem->setFlags(Qt::ItemIsEnabled);
        ui->shortcutsTableWidget->setItem(i, 0, actionItem);

        // Action shortcut
        QTableWidgetItem* shortcutItem = new QTableWidgetItem(action->shortcut().toString(QKeySequence::NativeText));
        ui->shortcutsTableWidget->setItem(i, 1, shortcutItem);
    }
}

bool PDFViewerSettingsDialog::saveActionShortcutsTable()
{
    // Jakub Melka: we need validation here
    for (int i = 0; i < m_actions.size(); ++i)
    {
        QString shortcut = ui->shortcutsTableWidget->item(i, 1)->data(Qt::DisplayRole).toString();
        if (!shortcut.isEmpty())
        {
            QKeySequence sequence = QKeySequence::fromString(shortcut, QKeySequence::NativeText);
            if (sequence.toString(QKeySequence::PortableText).isEmpty())
            {
                QMessageBox::critical(this, tr("Error"), tr("Shortcut '%1' is invalid for action %2.").arg(shortcut, m_actions[i]->text()));
                return false;
            }
        }
    }

    for (int i = 0; i < m_actions.size(); ++i)
    {
        QAction* action = m_actions[i];

        // Set shortcut to the action
        QString shortcut = ui->shortcutsTableWidget->item(i, 1)->data(Qt::DisplayRole).toString();
        QKeySequence sequence = QKeySequence::fromString(shortcut, QKeySequence::NativeText);
        action->setShortcut(sequence);
    }

    return true;
}

void PDFViewerSettingsDialog::setSpeechEngine(const QString& engine)
{
    if (m_currentSpeechEngine == engine)
    {
        return;
    }

    m_currentSpeechEngine = engine;
    QTextToSpeech textToSpeech(engine, nullptr);

    QVector<QLocale> locales = textToSpeech.availableLocales();
    ui->speechLocaleComboBox->setUpdatesEnabled(false);
    ui->speechLocaleComboBox->clear();
    for (const QLocale& locale : locales)
    {
        ui->speechLocaleComboBox->addItem(QString("%1 (%2)").arg(locale.nativeLanguageName(), locale.nativeCountryName()), locale.name());
    }
    ui->speechLocaleComboBox->setUpdatesEnabled(true);

    QVector<QVoice> voices = textToSpeech.availableVoices();
    ui->speechVoiceComboBox->setUpdatesEnabled(false);
    ui->speechVoiceComboBox->clear();
    for (const QVoice& voice : voices)
    {
        ui->speechVoiceComboBox->addItem(QString("%1 (%2, %3)").arg(voice.name(), QVoice::genderName(voice.gender()), QVoice::ageName(voice.age())), voice.name());
    }
    ui->speechVoiceComboBox->setUpdatesEnabled(true);
}

void PDFViewerSettingsDialog::accept()
{
    if (saveActionShortcutsTable())
    {
        QDialog::accept();
    }
}

void PDFViewerSettingsDialog::on_cmsProfileDirectoryButton_clicked()
{
    QString directory = QFileDialog::getExistingDirectory(this, tr("Select color profile directory"));
    if (!directory.isEmpty())
    {
        m_cmsSettings.profileDirectory = directory;
        loadData();
    }
}

}   // namespace pdfviewer