qwasmtheme.h - mozsearch

Enable keyboard shortcuts

// Copyright (C) 2018 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

// Qt-Security score:significant reason:default

#ifndef QWASMTHEME_H

#define QWASMTHEME_H

#include <qpa/qplatformtheme.h>

#include <QtGui/QFont>

#include <memory>

#include <private/qstdweb_p.h>

QT_BEGIN_NAMESPACE

class QWasmEventTranslator;

class QWasmFontDatabase;

class QWasmWindow;

class QWasmEventDispatcher;

class QWasmScreen;

class QWasmCompositor;

class QWasmBackingStore;

// this reflects @media/prefers-contrast

constexpr auto colorSchemePreferenceDark =  "(prefers-color-scheme: dark)";

constexpr auto contrastPreferenceNoPreference =  "(prefers-contrast: no-preference)";

constexpr auto contrastPreferenceMore =  "(prefers-contrast: more)";

constexpr auto contrastPreferenceLess =  "(prefers-contrast: less)";

constexpr auto contrastPreferenceCustom =  "(prefers-contrast: custom)";

// this reflects @media/prefers-reduced-motion

constexpr auto reducedMotionPreferenceReduce = "(prefers-reduced-motion: reduce)";

template <typename MediaName, typename CallbackFn, typename Container>

void registerCallbacks(std::initializer_list<MediaName> mediaNames, CallbackFn callback, Container &callbacksContainer)

    emscripten::val window = emscripten::val::global("window");

    if (!window.isUndefined()) {

        for (auto &&mediaName : mediaNames) {

            auto media = window.call<emscripten::val>("matchMedia", emscripten::val(mediaName));

            if constexpr (std::is_same_v<Container, std::vector<QWasmEventHandler>>) {

                callbacksContainer.emplace_back(media, "change", callback);

            } else {

                Q_ASSERT(mediaNames.size() == 1);

                callbacksContainer = QWasmEventHandler(media, "change", callback);

class QWasmTheme : public QPlatformTheme

public:

    QWasmTheme();

    ~QWasmTheme();

    const QPalette *palette(Palette type = SystemPalette) const override;

    Qt::ColorScheme colorScheme() const override;

    void requestColorScheme(Qt::ColorScheme scheme) override;

    Qt::ContrastPreference contrastPreference() const override;

    Qt::MotionPreference motionPreference() const override;

    QVariant themeHint(ThemeHint hint) const override;

    const QFont *font(Font type) const override;

    bool usePlatformNativeDialog(DialogType type) const override;

    QPlatformDialogHelper *createPlatformDialogHelper(DialogType type) const override;

    QFont *fixedFont = nullptr;

    void onColorSchemeChange();

    void onContrastPreferenceChange();

    void onMotionPreferenceChange();

private:

    Qt::ColorScheme m_colorScheme = Qt::ColorScheme::Unknown;

    QWasmEventHandler m_colorSchemeChangeCallback;

    std::unique_ptr<QPalette> m_palette;

    mutable bool m_paletteIsDirty = false;

    Qt::ContrastPreference m_contrastPreference;

    std::vector<QWasmEventHandler> m_contrastPreferenceChangeCallbacks;

    Qt::MotionPreference m_motionPreference;

    QWasmEventHandler m_motionPreferenceChangeCallback;

};

QT_END_NAMESPACE

#endif // QWASMTHEME_H