qplatforminputcontext.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 "qplatforminputcontext.h"
#include <qguiapplication.h>
#include <QRect>
#include "private/qkeymapper_p.h"
#include "private/qhighdpiscaling_p.h"
#include <qpa/qplatforminputcontext_p.h>
 
#include <QtGui/qtransform.h>
 
QT_BEGIN_NAMESPACE
 
QPlatformInputContext::QPlatformInputContext()
    : QObject(*(new QPlatformInputContextPrivate))
{
    // Delay initialization of cached input direction
    // until super class has finished constructing.
    QMetaObject::invokeMethod(this, [this]{
        m_inputDirection = inputDirection();
    }, Qt::QueuedConnection);
}
 
QPlatformInputContext::~QPlatformInputContext()
{
}
 
bool QPlatformInputContext::isValid() const
{
    return false;
}
 
bool QPlatformInputContext::hasCapability(Capability capability) const
{
    Q_UNUSED(capability);
    return true;
}
 
void QPlatformInputContext::reset()
{
}
 
void QPlatformInputContext::commit()
{
}
 
void QPlatformInputContext::update(Qt::InputMethodQueries)
{
}
 
void QPlatformInputContext::invokeAction(QInputMethod::Action action, int cursorPosition)
{
    Q_UNUSED(cursorPosition);
    // Default behavior for simple ephemeral input contexts. Some
    // complex input contexts should not be reset here.
    if (action == QInputMethod::Click)
        reset();
}
 
bool QPlatformInputContext::filterEvent(const QEvent *event)
{
    Q_UNUSED(event);
    return false;
}
 
QRectF QPlatformInputContext::keyboardRect() const
{
    return QRectF();
}
 
void QPlatformInputContext::emitKeyboardRectChanged()
{
    emit QGuiApplication::inputMethod()->keyboardRectangleChanged();
}
 
bool QPlatformInputContext::isAnimating() const
{
    return false;
}
 
void QPlatformInputContext::emitAnimatingChanged()
{
    emit QGuiApplication::inputMethod()->animatingChanged();
}
 
void QPlatformInputContext::showInputPanel()
{
}
 
void QPlatformInputContext::hideInputPanel()
{
}
 
bool QPlatformInputContext::isInputPanelVisible() const
{
    return false;
}
 
void QPlatformInputContext::emitInputPanelVisibleChanged()
{
    emit QGuiApplication::inputMethod()->visibleChanged();
}
 
QLocale QPlatformInputContext::locale() const
{
    return QLocale::system();
}
 
void QPlatformInputContext::emitLocaleChanged()
{
    emit QGuiApplication::inputMethod()->localeChanged();
 
    // Changing the locale might have updated the input direction
    emitInputDirectionChanged(inputDirection());
}
 
Qt::LayoutDirection QPlatformInputContext::inputDirection() const
{
    return locale().textDirection();
}
 
void QPlatformInputContext::emitInputDirectionChanged(Qt::LayoutDirection newDirection)
{
    if (newDirection == m_inputDirection)
        return;
 
    emit QGuiApplication::inputMethod()->inputDirectionChanged(newDirection);
    m_inputDirection = newDirection;
}
 
void QPlatformInputContext::setFocusObject(QObject *object)
{
    Q_UNUSED(object);
}
 
bool QPlatformInputContext::inputMethodAccepted() const
{
    return QPlatformInputContextPrivate::s_inputMethodAccepted;
}
 
bool QPlatformInputContextPrivate::s_inputMethodAccepted = false;
 
void QPlatformInputContextPrivate::setInputMethodAccepted(bool accepted)
{
    QPlatformInputContextPrivate::s_inputMethodAccepted = accepted;
}
 
void QPlatformInputContext::setSelectionOnFocusObject(const QPointF &nativeAnchorPos, const QPointF &nativeCursorPos)
{
    QObject *focus = qApp->focusObject();
    if (!focus)
        return;
 
    QWindow *window = qApp->focusWindow();
    const QPointF &anchorPos = QHighDpi::fromNativePixels(nativeAnchorPos, window);
    const QPointF &cursorPos = QHighDpi::fromNativePixels(nativeCursorPos, window);
 
    QInputMethod *im = QGuiApplication::inputMethod();
    const QTransform mapToLocal = im->inputItemTransform().inverted();
    bool success;
    int anchor = QInputMethod::queryFocusObject(Qt::ImCursorPosition, anchorPos * mapToLocal).toInt(&success);
    if (success) {
        int cursor = QInputMethod::queryFocusObject(Qt::ImCursorPosition, cursorPos * mapToLocal).toInt(&success);
        if (success) {
            if (anchor == cursor && anchorPos != cursorPos)
                return;
            QList<QInputMethodEvent::Attribute> imAttributes;
            imAttributes.append(QInputMethodEvent::Attribute(QInputMethodEvent::Selection, anchor, cursor - anchor, QVariant()));
            QInputMethodEvent event(QString(), imAttributes);
            QGuiApplication::sendEvent(focus, &event);
        }
    }
}
 
QVariant QPlatformInputContext::queryFocusObject(Qt::InputMethodQuery query, QPointF nativePosition)
{
    const QPointF position = QHighDpi::fromNativePixels(nativePosition, QGuiApplication::focusWindow());
    const QInputMethod *im = QGuiApplication::inputMethod();
    const QTransform mapToLocal = im->inputItemTransform().inverted();
    return im->queryFocusObject(query, mapToLocal.map(position));
}
 
QRectF QPlatformInputContext::inputItemRectangle()
{
    QInputMethod *im = QGuiApplication::inputMethod();
    const QRectF deviceIndependentRectangle = im->inputItemTransform().mapRect(im->inputItemRectangle());
    return QHighDpi::toNativePixels(deviceIndependentRectangle, QGuiApplication::focusWindow());
}
 
QRectF QPlatformInputContext::inputItemClipRectangle()
{
    return QHighDpi::toNativePixels(
        QGuiApplication::inputMethod()->inputItemClipRectangle(), QGuiApplication::focusWindow());
}
 
QRectF QPlatformInputContext::cursorRectangle()
{
    return QHighDpi::toNativePixels(
        QGuiApplication::inputMethod()->cursorRectangle(), QGuiApplication::focusWindow());
}
 
QRectF QPlatformInputContext::anchorRectangle()
{
    return QHighDpi::toNativePixels(
        QGuiApplication::inputMethod()->anchorRectangle(), QGuiApplication::focusWindow());
}
 
QRectF QPlatformInputContext::keyboardRectangle()
{
    return QHighDpi::toNativePixels(
        QGuiApplication::inputMethod()->keyboardRectangle(), QGuiApplication::focusWindow());
}
 
QT_END_NAMESPACE
 
#include "moc_qplatforminputcontext.cpp"