qquickshortcut.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qquickshortcut_p.h"
 
#include <QtQuick/qquickitem.h>
#include <QtQuick/qquickwindow.h>
#include <QtQuick/qquickrendercontrol.h>
#include <QtQuick/private/qtquickglobal_p.h>
#include <QtGui/private/qguiapplication_p.h>
#include <QtQml/qqmlinfo.h>
 
static bool qQuickShortcutContextMatcher(QObject *obj, Qt::ShortcutContext context)
{
    switch (context) {
    case Qt::ApplicationShortcut:
        return true;
    case Qt::WindowShortcut:
        while (obj && !obj->isWindowType()) {
            obj = obj->parent();
            if (QQuickItem *item = qobject_cast<QQuickItem *>(obj))
                obj = item->window();
        }
        if (QWindow *renderWindow = QQuickRenderControl::renderWindowFor(qobject_cast<QQuickWindow *>(obj)))
            obj = renderWindow;
        return obj && obj == QGuiApplication::focusWindow();
    default:
        return false;
    }
}
 
typedef bool (*ContextMatcher)(QObject *, Qt::ShortcutContext);
 
Q_GLOBAL_STATIC_WITH_ARGS(ContextMatcher, ctxMatcher, (qQuickShortcutContextMatcher))
 
Q_QUICK_EXPORT ContextMatcher qt_quick_shortcut_context_matcher()
{
    return *ctxMatcher();
}
 
Q_QUICK_EXPORT void qt_quick_set_shortcut_context_matcher(ContextMatcher matcher)
{
    if (!ctxMatcher.isDestroyed())
        *ctxMatcher() = matcher;
}
 
QT_BEGIN_NAMESPACE
 
static QKeySequence valueToKeySequence(const QVariant &value, const QQuickShortcut *const shortcut)
{
    if (value.userType() == QMetaType::Int) {
        const QVector<QKeySequence> s =
                QKeySequence::keyBindings(static_cast<QKeySequence::StandardKey>(value.toInt()));
        if (s.size() > 1) {
            const QString templateString = QString::fromUtf16(
                    u"Shortcut: Only binding to one of multiple key bindings associated with %1. "
                    u"Use 'sequences: [ <key> ]' to bind to all of them.");
            qmlWarning(shortcut)
                    << templateString.arg(static_cast<QKeySequence::StandardKey>(value.toInt()));
        }
        return s.size() > 0 ? s[0] : QKeySequence {};
    }
 
    return QKeySequence::fromString(value.toString());
}
 
static QList<QKeySequence> valueToKeySequences(const QVariant &value)
{
    if (value.userType() == QMetaType::Int) {
        return QKeySequence::keyBindings(static_cast<QKeySequence::StandardKey>(value.toInt()));
    } else {
        QList<QKeySequence> result;
        result.push_back(QKeySequence::fromString(value.toString()));
        return result;
    }
}
 
QQuickShortcut::QQuickShortcut(QObject *parent) : QObject(parent),
    m_enabled(true), m_completed(false), m_autorepeat(true), m_context(Qt::WindowShortcut)
{
}
 
QQuickShortcut::~QQuickShortcut()
{
    ungrabShortcut(m_shortcut);
    for (Shortcut &shortcut : m_shortcuts)
        ungrabShortcut(shortcut);
}
 
QVariant QQuickShortcut::sequence() const
{
    return m_shortcut.userValue;
}
 
void QQuickShortcut::setSequence(const QVariant &value)
{
    if (value == m_shortcut.userValue)
        return;
 
    QKeySequence keySequence = valueToKeySequence(value, this);
 
    ungrabShortcut(m_shortcut);
    m_shortcut.userValue = value;
    m_shortcut.keySequence = keySequence;
    grabShortcut(m_shortcut, m_context);
    emit sequenceChanged();
}
 
QVariantList QQuickShortcut::sequences() const
{
    QVariantList values;
    for (const Shortcut &shortcut : m_shortcuts)
        values += shortcut.userValue;
    return values;
}
 
void QQuickShortcut::setSequences(const QVariantList &values)
{
    // convert QVariantList to QVector<QKeySequence>
    QVector<Shortcut> requestedShortcuts;
    for (const QVariant &v : values) {
        const QVector<QKeySequence> list = valueToKeySequences(v);
        for (const QKeySequence &s : list) {
            Shortcut sc;
            sc.userValue = v;
            sc.keySequence = s;
            requestedShortcuts.push_back(sc);
        }
    }
 
    // if nothing has changed, just return:
    if (m_shortcuts.size() == requestedShortcuts.size()) {
        bool changed = false;
        for (int i = 0; i < requestedShortcuts.size(); ++i) {
            const Shortcut &requestedShortcut = requestedShortcuts[i];
            const Shortcut &shortcut = m_shortcuts[i];
            if (!(requestedShortcut.userValue == shortcut.userValue
                  && requestedShortcut.keySequence == shortcut.keySequence)) {
                changed = true;
                break;
            }
        }
        if (!changed) {
            return;
        }
    }
 
    for (Shortcut &s : m_shortcuts)
        ungrabShortcut(s);
    m_shortcuts = requestedShortcuts;
    for (Shortcut &s : m_shortcuts)
        grabShortcut(s, m_context);
 
    emit sequencesChanged();
}
 
QString QQuickShortcut::nativeText() const
{
    return m_shortcut.keySequence.toString(QKeySequence::NativeText);
}
 
QString QQuickShortcut::portableText() const
{
    return m_shortcut.keySequence.toString(QKeySequence::PortableText);
}
 
bool QQuickShortcut::isEnabled() const
{
    return m_enabled;
}
 
void QQuickShortcut::setEnabled(bool enabled)
{
    if (enabled == m_enabled)
        return;
 
    setEnabled(m_shortcut, enabled);
    for (Shortcut &shortcut : m_shortcuts)
        setEnabled(shortcut, enabled);
 
    m_enabled = enabled;
    emit enabledChanged();
}
 
bool QQuickShortcut::autoRepeat() const
{
    return m_autorepeat;
}
 
void QQuickShortcut::setAutoRepeat(bool repeat)
{
    if (repeat == m_autorepeat)
        return;
 
    setAutoRepeat(m_shortcut, repeat);
    for (Shortcut &shortcut : m_shortcuts)
        setAutoRepeat(shortcut, repeat);
 
    m_autorepeat = repeat;
    emit autoRepeatChanged();
}
 
Qt::ShortcutContext QQuickShortcut::context() const
{
    return m_context;
}
 
void QQuickShortcut::setContext(Qt::ShortcutContext context)
{
    if (context == m_context)
        return;
 
    ungrabShortcut(m_shortcut);
    for (auto &s : m_shortcuts)
        ungrabShortcut(s);
 
    m_context = context;
 
    grabShortcut(m_shortcut, context);
    for (auto &s : m_shortcuts)
        grabShortcut(s, context);
 
    emit contextChanged();
}
 
void QQuickShortcut::classBegin()
{
}
 
void QQuickShortcut::componentComplete()
{
    m_completed = true;
    grabShortcut(m_shortcut, m_context);
    for (Shortcut &shortcut : m_shortcuts)
        grabShortcut(shortcut, m_context);
}
 
bool QQuickShortcut::event(QEvent *event)
{
    if (m_enabled && event->type() == QEvent::Shortcut) {
        QShortcutEvent *se = static_cast<QShortcutEvent *>(event);
        bool match = m_shortcut.matches(se);
        int i = 0;
        while (!match && i < m_shortcuts.size())
            match |= m_shortcuts.at(i++).matches(se);
        if (match) {
            if (se->isAmbiguous())
                emit activatedAmbiguously();
            else
                emit activated();
            return true;
        }
    }
    return false;
}
 
bool QQuickShortcut::Shortcut::matches(QShortcutEvent *event) const
{
    return event->shortcutId() == id && event->key() == keySequence;
}
 
void QQuickShortcut::setEnabled(QQuickShortcut::Shortcut &shortcut, bool enabled)
{
    if (shortcut.id)
        QGuiApplicationPrivate::instance()->shortcutMap.setShortcutEnabled(enabled, shortcut.id, this);
}
 
void QQuickShortcut::setAutoRepeat(QQuickShortcut::Shortcut &shortcut, bool repeat)
{
    if (shortcut.id)
        QGuiApplicationPrivate::instance()->shortcutMap.setShortcutAutoRepeat(repeat, shortcut.id, this);
}
 
void QQuickShortcut::grabShortcut(Shortcut &shortcut, Qt::ShortcutContext context)
{
    if (m_completed && !shortcut.keySequence.isEmpty()) {
        QGuiApplicationPrivate *pApp = QGuiApplicationPrivate::instance();
        shortcut.id = pApp->shortcutMap.addShortcut(this, shortcut.keySequence, context, *ctxMatcher());
        if (!m_enabled)
            pApp->shortcutMap.setShortcutEnabled(false, shortcut.id, this);
        if (!m_autorepeat)
            pApp->shortcutMap.setShortcutAutoRepeat(false, shortcut.id, this);
    }
}
 
void QQuickShortcut::ungrabShortcut(Shortcut &shortcut)
{
    if (shortcut.id) {
        QGuiApplicationPrivate::instance()->shortcutMap.removeShortcut(shortcut.id, this);
        shortcut.id = 0;
    }
}
 
QT_END_NAMESPACE
 
#include "moc_qquickshortcut_p.cpp"