Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 740 insertions, 0 deletions

diff --git a/vcl/qt5/Qt5Widget.cxx b/vcl/qt5/Qt5Widget.cxx
new file mode 100644
index 000000000..0ef305f42
--- /dev/null
+++ b/vcl/qt5/Qt5Widget.cxx
@@ -0,0 +1,740 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <Qt5Widget.hxx>
+#include <Qt5Widget.moc>
+
+#include <Qt5Frame.hxx>
+#include <Qt5Graphics.hxx>
+#include <Qt5Instance.hxx>
+#include <Qt5SvpGraphics.hxx>
+#include <Qt5Transferable.hxx>
+#include <Qt5Tools.hxx>
+
+#include <QtCore/QMimeData>
+#include <QtGui/QDrag>
+#include <QtGui/QFocusEvent>
+#include <QtGui/QGuiApplication>
+#include <QtGui/QImage>
+#include <QtGui/QKeyEvent>
+#include <QtGui/QMouseEvent>
+#include <QtGui/QPainter>
+#include <QtGui/QPaintEvent>
+#include <QtGui/QResizeEvent>
+#include <QtGui/QShowEvent>
+#include <QtGui/QTextCharFormat>
+#include <QtGui/QWheelEvent>
+#include <QtWidgets/QMainWindow>
+#include <QtWidgets/QWidget>
+
+#include <cairo.h>
+#include <vcl/commandevent.hxx>
+#include <vcl/event.hxx>
+#include <window.h>
+#include <tools/diagnose_ex.h>
+
+#include <com/sun/star/accessibility/XAccessibleContext.hpp>
+#include <com/sun/star/accessibility/XAccessibleEditableText.hpp>
+
+using namespace com::sun::star;
+
+void Qt5Widget::paintEvent(QPaintEvent* pEvent)
+{
+    QPainter p(this);
+    if (!m_rFrame.m_bNullRegion)
+        p.setClipRegion(m_rFrame.m_aRegion);
+
+    QImage aImage;
+    if (m_rFrame.m_bUseCairo)
+    {
+        cairo_surface_t* pSurface = m_rFrame.m_pSurface.get();
+        cairo_surface_flush(pSurface);
+
+        aImage = QImage(cairo_image_surface_get_data(pSurface),
+                        cairo_image_surface_get_width(pSurface),
+                        cairo_image_surface_get_height(pSurface), Qt5_DefaultFormat32);
+    }
+    else
+        aImage = *m_rFrame.m_pQImage;
+
+    const qreal fRatio = m_rFrame.devicePixelRatioF();
+    aImage.setDevicePixelRatio(fRatio);
+    QRectF source(pEvent->rect().topLeft() * fRatio, pEvent->rect().size() * fRatio);
+    p.drawImage(pEvent->rect(), aImage, source);
+}
+
+void Qt5Widget::resizeEvent(QResizeEvent* pEvent)
+{
+    const qreal fRatio = m_rFrame.devicePixelRatioF();
+    const int nWidth = ceil(pEvent->size().width() * fRatio);
+    const int nHeight = ceil(pEvent->size().height() * fRatio);
+
+    m_rFrame.maGeometry.nWidth = nWidth;
+    m_rFrame.maGeometry.nHeight = nHeight;
+
+    if (m_rFrame.m_bUseCairo)
+    {
+        if (m_rFrame.m_pSvpGraphics)
+        {
+            cairo_surface_t* pSurface
+                = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, nWidth, nHeight);
+            cairo_surface_set_user_data(pSurface, SvpSalGraphics::getDamageKey(),
+                                        &m_rFrame.m_aDamageHandler, nullptr);
+            m_rFrame.m_pSvpGraphics->setSurface(pSurface, basegfx::B2IVector(nWidth, nHeight));
+            UniqueCairoSurface old_surface(m_rFrame.m_pSurface.release());
+            m_rFrame.m_pSurface.reset(pSurface);
+
+            int min_width = qMin(cairo_image_surface_get_width(old_surface.get()), nWidth);
+            int min_height = qMin(cairo_image_surface_get_height(old_surface.get()), nHeight);
+
+            SalTwoRect rect(0, 0, min_width, min_height, 0, 0, min_width, min_height);
+
+            m_rFrame.m_pSvpGraphics->copySource(rect, old_surface.get());
+        }
+    }
+    else
+    {
+        QImage* pImage = nullptr;
+
+        if (m_rFrame.m_pQImage)
+            pImage = new QImage(m_rFrame.m_pQImage->copy(0, 0, nWidth, nHeight));
+        else
+        {
+            pImage = new QImage(nWidth, nHeight, Qt5_DefaultFormat32);
+            pImage->fill(Qt::transparent);
+        }
+
+        m_rFrame.m_pQt5Graphics->ChangeQImage(pImage);
+        m_rFrame.m_pQImage.reset(pImage);
+    }
+
+    m_rFrame.CallCallback(SalEvent::Resize, nullptr);
+}
+
+void Qt5Widget::handleMouseButtonEvent(const Qt5Frame& rFrame, const QMouseEvent* pEvent,
+                                       const ButtonKeyState eState)
+{
+    SalMouseEvent aEvent;
+    switch (pEvent->button())
+    {
+        case Qt::LeftButton:
+            aEvent.mnButton = MOUSE_LEFT;
+            break;
+        case Qt::MidButton:
+            aEvent.mnButton = MOUSE_MIDDLE;
+            break;
+        case Qt::RightButton:
+            aEvent.mnButton = MOUSE_RIGHT;
+            break;
+        default:
+            return;
+    }
+
+    const qreal fRatio = rFrame.devicePixelRatioF();
+    const Point aPos = toPoint(pEvent->pos() * fRatio);
+
+    aEvent.mnX = QGuiApplication::isLeftToRight()
+                     ? aPos.X()
+                     : round(rFrame.GetQWidget()->width() * fRatio) - aPos.X();
+    aEvent.mnY = aPos.Y();
+    aEvent.mnTime = pEvent->timestamp();
+    aEvent.mnCode = GetKeyModCode(pEvent->modifiers()) | GetMouseModCode(pEvent->buttons());
+
+    SalEvent nEventType;
+    if (eState == ButtonKeyState::Pressed)
+        nEventType = SalEvent::MouseButtonDown;
+    else
+        nEventType = SalEvent::MouseButtonUp;
+    rFrame.CallCallback(nEventType, &aEvent);
+}
+
+void Qt5Widget::mousePressEvent(QMouseEvent* pEvent) { handleMousePressEvent(m_rFrame, pEvent); }
+
+void Qt5Widget::mouseReleaseEvent(QMouseEvent* pEvent)
+{
+    handleMouseReleaseEvent(m_rFrame, pEvent);
+}
+
+void Qt5Widget::mouseMoveEvent(QMouseEvent* pEvent)
+{
+    const qreal fRatio = m_rFrame.devicePixelRatioF();
+    const Point aPos = toPoint(pEvent->pos() * fRatio);
+
+    SalMouseEvent aEvent;
+    aEvent.mnX = QGuiApplication::isLeftToRight() ? aPos.X() : round(width() * fRatio) - aPos.X();
+    aEvent.mnY = aPos.Y();
+    aEvent.mnTime = pEvent->timestamp();
+    aEvent.mnCode = GetKeyModCode(pEvent->modifiers()) | GetMouseModCode(pEvent->buttons());
+    aEvent.mnButton = 0;
+
+    m_rFrame.CallCallback(SalEvent::MouseMove, &aEvent);
+    pEvent->accept();
+}
+
+void Qt5Widget::wheelEvent(QWheelEvent* pEvent)
+{
+    const Point aPos = toPoint(pEvent->pos() * m_rFrame.devicePixelRatioF());
+
+    SalWheelMouseEvent aEvent;
+    aEvent.mnX = QGuiApplication::isLeftToRight()
+                     ? aPos.X()
+                     : round(width() * m_rFrame.devicePixelRatioF()) - aPos.X();
+    aEvent.mnY = aPos.Y();
+    aEvent.mnTime = pEvent->timestamp();
+    aEvent.mnCode = GetKeyModCode(pEvent->modifiers()) | GetMouseModCode(pEvent->buttons());
+
+    // mouse wheel ticks are 120, which we map to 3 lines.
+    // we have to accumulate for touch scroll to keep track of the absolute delta.
+
+    int nDelta = pEvent->angleDelta().y(), lines;
+    aEvent.mbHorz = nDelta == 0;
+    if (aEvent.mbHorz)
+    {
+        nDelta = (QGuiApplication::isLeftToRight() ? 1 : -1) * pEvent->angleDelta().x();
+        if (!nDelta)
+            return;
+
+        m_nDeltaX += nDelta;
+        lines = m_nDeltaX / 40;
+        m_nDeltaX = m_nDeltaX % 40;
+    }
+    else
+    {
+        m_nDeltaY += nDelta;
+        lines = m_nDeltaY / 40;
+        m_nDeltaY = m_nDeltaY % 40;
+    }
+
+    aEvent.mnDelta = nDelta;
+    aEvent.mnNotchDelta = nDelta < 0 ? -1 : 1;
+    aEvent.mnScrollLines = std::abs(lines);
+
+    m_rFrame.CallCallback(SalEvent::WheelMouse, &aEvent);
+    pEvent->accept();
+}
+
+void Qt5Widget::dragEnterEvent(QDragEnterEvent* event)
+{
+    if (dynamic_cast<const Qt5MimeData*>(event->mimeData()))
+        event->accept();
+    else
+        event->acceptProposedAction();
+}
+
+// also called when a drop is rejected
+void Qt5Widget::dragLeaveEvent(QDragLeaveEvent*) { m_rFrame.handleDragLeave(); }
+
+void Qt5Widget::dragMoveEvent(QDragMoveEvent* pEvent) { m_rFrame.handleDragMove(pEvent); }
+
+void Qt5Widget::dropEvent(QDropEvent* pEvent) { m_rFrame.handleDrop(pEvent); }
+
+void Qt5Widget::moveEvent(QMoveEvent* pEvent)
+{
+    if (m_rFrame.m_pTopLevel)
+        return;
+
+    const Point aPos = toPoint(pEvent->pos() * m_rFrame.devicePixelRatioF());
+    m_rFrame.maGeometry.nX = aPos.X();
+    m_rFrame.maGeometry.nY = aPos.Y();
+    m_rFrame.CallCallback(SalEvent::Move, nullptr);
+}
+
+void Qt5Widget::showEvent(QShowEvent*)
+{
+    QSize aSize(m_rFrame.GetQWidget()->size() * m_rFrame.devicePixelRatioF());
+    // forcing an immediate update somehow interferes with the hide + show
+    // sequence from Qt5Frame::SetModal, if the frame was already set visible,
+    // resulting in a hidden / unmapped window
+    SalPaintEvent aPaintEvt(0, 0, aSize.width(), aSize.height());
+    m_rFrame.CallCallback(SalEvent::Paint, &aPaintEvt);
+}
+
+void Qt5Widget::closeEvent(QCloseEvent* /*pEvent*/)
+{
+    m_rFrame.CallCallback(SalEvent::Close, nullptr);
+}
+
+static sal_uInt16 GetKeyCode(int keyval, Qt::KeyboardModifiers modifiers)
+{
+    sal_uInt16 nCode = 0;
+    if (keyval >= Qt::Key_0 && keyval <= Qt::Key_9)
+        nCode = KEY_0 + (keyval - Qt::Key_0);
+    else if (keyval >= Qt::Key_A && keyval <= Qt::Key_Z)
+        nCode = KEY_A + (keyval - Qt::Key_A);
+    else if (keyval >= Qt::Key_F1 && keyval <= Qt::Key_F26)
+        nCode = KEY_F1 + (keyval - Qt::Key_F1);
+    else if (modifiers.testFlag(Qt::KeypadModifier)
+             && (keyval == Qt::Key_Period || keyval == Qt::Key_Comma))
+        // Qt doesn't use a special keyval for decimal separator ("," or ".")
+        // on numerical keypad, but sets Qt::KeypadModifier in addition
+        nCode = KEY_DECIMAL;
+    else
+    {
+        switch (keyval)
+        {
+            case Qt::Key_Down:
+                nCode = KEY_DOWN;
+                break;
+            case Qt::Key_Up:
+                nCode = KEY_UP;
+                break;
+            case Qt::Key_Left:
+                nCode = KEY_LEFT;
+                break;
+            case Qt::Key_Right:
+                nCode = KEY_RIGHT;
+                break;
+            case Qt::Key_Home:
+                nCode = KEY_HOME;
+                break;
+            case Qt::Key_End:
+                nCode = KEY_END;
+                break;
+            case Qt::Key_PageUp:
+                nCode = KEY_PAGEUP;
+                break;
+            case Qt::Key_PageDown:
+                nCode = KEY_PAGEDOWN;
+                break;
+            case Qt::Key_Return:
+            case Qt::Key_Enter:
+                nCode = KEY_RETURN;
+                break;
+            case Qt::Key_Escape:
+                nCode = KEY_ESCAPE;
+                break;
+            case Qt::Key_Tab:
+            // oddly enough, Qt doesn't send Shift-Tab event as 'Tab key pressed with Shift
+            // modifier' but as 'Backtab key pressed' (while its modifier bits are still
+            // set to Shift) -- so let's map both Key_Tab and Key_Backtab to VCL's KEY_TAB
+            case Qt::Key_Backtab:
+                nCode = KEY_TAB;
+                break;
+            case Qt::Key_Backspace:
+                nCode = KEY_BACKSPACE;
+                break;
+            case Qt::Key_Space:
+                nCode = KEY_SPACE;
+                break;
+            case Qt::Key_Insert:
+                nCode = KEY_INSERT;
+                break;
+            case Qt::Key_Delete:
+                nCode = KEY_DELETE;
+                break;
+            case Qt::Key_Plus:
+                nCode = KEY_ADD;
+                break;
+            case Qt::Key_Minus:
+                nCode = KEY_SUBTRACT;
+                break;
+            case Qt::Key_Asterisk:
+                nCode = KEY_MULTIPLY;
+                break;
+            case Qt::Key_Slash:
+                nCode = KEY_DIVIDE;
+                break;
+            case Qt::Key_Period:
+                nCode = KEY_POINT;
+                break;
+            case Qt::Key_Comma:
+                nCode = KEY_COMMA;
+                break;
+            case Qt::Key_Less:
+                nCode = KEY_LESS;
+                break;
+            case Qt::Key_Greater:
+                nCode = KEY_GREATER;
+                break;
+            case Qt::Key_Equal:
+                nCode = KEY_EQUAL;
+                break;
+            case Qt::Key_Find:
+                nCode = KEY_FIND;
+                break;
+            case Qt::Key_Menu:
+                nCode = KEY_CONTEXTMENU;
+                break;
+            case Qt::Key_Help:
+                nCode = KEY_HELP;
+                break;
+            case Qt::Key_Undo:
+                nCode = KEY_UNDO;
+                break;
+            case Qt::Key_Redo:
+                nCode = KEY_REPEAT;
+                break;
+            case Qt::Key_Cancel:
+                nCode = KEY_F11;
+                break;
+            case Qt::Key_AsciiTilde:
+                nCode = KEY_TILDE;
+                break;
+            case Qt::Key_QuoteLeft:
+                nCode = KEY_QUOTELEFT;
+                break;
+            case Qt::Key_BracketLeft:
+                nCode = KEY_BRACKETLEFT;
+                break;
+            case Qt::Key_BracketRight:
+                nCode = KEY_BRACKETRIGHT;
+                break;
+            case Qt::Key_Semicolon:
+                nCode = KEY_SEMICOLON;
+                break;
+            case Qt::Key_Copy:
+                nCode = KEY_COPY;
+                break;
+            case Qt::Key_Cut:
+                nCode = KEY_CUT;
+                break;
+            case Qt::Key_Open:
+                nCode = KEY_OPEN;
+                break;
+            case Qt::Key_Paste:
+                nCode = KEY_PASTE;
+                break;
+        }
+    }
+
+    return nCode;
+}
+
+void Qt5Widget::commitText(Qt5Frame& rFrame, const QString& aText)
+{
+    SalExtTextInputEvent aInputEvent;
+    aInputEvent.mpTextAttr = nullptr;
+    aInputEvent.mnCursorFlags = 0;
+    aInputEvent.maText = toOUString(aText);
+    aInputEvent.mnCursorPos = aInputEvent.maText.getLength();
+
+    SolarMutexGuard aGuard;
+    vcl::DeletionListener aDel(&rFrame);
+    rFrame.CallCallback(SalEvent::ExtTextInput, &aInputEvent);
+    if (!aDel.isDeleted())
+        rFrame.CallCallback(SalEvent::EndExtTextInput, nullptr);
+}
+
+bool Qt5Widget::handleKeyEvent(Qt5Frame& rFrame, const QWidget& rWidget, QKeyEvent* pEvent,
+                               const ButtonKeyState eState)
+{
+    sal_uInt16 nCode = GetKeyCode(pEvent->key(), pEvent->modifiers());
+    if (eState == ButtonKeyState::Pressed && nCode == 0 && pEvent->text().length() > 1
+        && rWidget.testAttribute(Qt::WA_InputMethodEnabled))
+    {
+        commitText(rFrame, pEvent->text());
+        pEvent->accept();
+        return true;
+    }
+
+    SalKeyEvent aEvent;
+    aEvent.mnCharCode = (pEvent->text().isEmpty() ? 0 : pEvent->text().at(0).unicode());
+    aEvent.mnRepeat = 0;
+    aEvent.mnCode = nCode;
+    aEvent.mnCode |= GetKeyModCode(pEvent->modifiers());
+
+    QGuiApplication::inputMethod()->update(Qt::ImCursorRectangle);
+
+    bool bStopProcessingKey;
+    if (eState == ButtonKeyState::Pressed)
+        bStopProcessingKey = rFrame.CallCallback(SalEvent::KeyInput, &aEvent);
+    else
+        bStopProcessingKey = rFrame.CallCallback(SalEvent::KeyUp, &aEvent);
+    if (bStopProcessingKey)
+        pEvent->accept();
+    return bStopProcessingKey;
+}
+
+bool Qt5Widget::handleEvent(Qt5Frame& rFrame, const QWidget& rWidget, QEvent* pEvent)
+{
+    if (pEvent->type() == QEvent::ShortcutOverride)
+    {
+        // ignore non-spontaneous QEvent::ShortcutOverride events,
+        // since such an extra event is sent e.g. with Orca screen reader enabled,
+        // so that two events of that kind (the "real one" and a non-spontaneous one)
+        // would otherwise be processed, resulting in duplicate input as 'handleKeyEvent'
+        // is called below (s. tdf#122053)
+        if (!pEvent->spontaneous())
+        {
+            return false;
+        }
+
+        // Accepted event disables shortcut activation,
+        // but enables keypress event.
+        // If event is not accepted and shortcut is successfully activated,
+        // KeyPress event is omitted.
+        //
+        // Instead of processing keyPressEvent, handle ShortcutOverride event,
+        // and if it's handled - disable the shortcut, it should have been activated.
+        // Don't process keyPressEvent generated after disabling shortcut since it was handled here.
+        // If event is not handled, don't accept it and let Qt activate related shortcut.
+        if (handleKeyEvent(rFrame, rWidget, static_cast<QKeyEvent*>(pEvent),
+                           ButtonKeyState::Pressed))
+            return true;
+    }
+    return false;
+}
+
+bool Qt5Widget::event(QEvent* pEvent)
+{
+    return handleEvent(m_rFrame, *this, pEvent) || QWidget::event(pEvent);
+}
+
+void Qt5Widget::keyReleaseEvent(QKeyEvent* pEvent)
+{
+    if (!handleKeyReleaseEvent(m_rFrame, *this, pEvent))
+        QWidget::keyReleaseEvent(pEvent);
+}
+
+void Qt5Widget::focusInEvent(QFocusEvent*) { m_rFrame.CallCallback(SalEvent::GetFocus, nullptr); }
+
+void Qt5Widget::focusOutEvent(QFocusEvent*)
+{
+    endExtTextInput();
+    m_rFrame.CallCallback(SalEvent::LoseFocus, nullptr);
+}
+
+Qt5Widget::Qt5Widget(Qt5Frame& rFrame, Qt::WindowFlags f)
+    : QWidget(Q_NULLPTR, f)
+    , m_rFrame(rFrame)
+    , m_bNonEmptyIMPreeditSeen(false)
+    , m_nDeltaX(0)
+    , m_nDeltaY(0)
+{
+    create();
+    setMouseTracking(true);
+    setFocusPolicy(Qt::StrongFocus);
+}
+
+static ExtTextInputAttr lcl_MapUndrelineStyle(QTextCharFormat::UnderlineStyle us)
+{
+    switch (us)
+    {
+        case QTextCharFormat::NoUnderline:
+            return ExtTextInputAttr::NONE;
+        case QTextCharFormat::DotLine:
+            return ExtTextInputAttr::DottedUnderline;
+        case QTextCharFormat::DashDotDotLine:
+        case QTextCharFormat::DashDotLine:
+            return ExtTextInputAttr::DashDotUnderline;
+        case QTextCharFormat::WaveUnderline:
+            return ExtTextInputAttr::GrayWaveline;
+        default:
+            return ExtTextInputAttr::Underline;
+    }
+}
+
+void Qt5Widget::inputMethodEvent(QInputMethodEvent* pEvent)
+{
+    if (!pEvent->commitString().isEmpty())
+        commitText(m_rFrame, pEvent->commitString());
+    else
+    {
+        SalExtTextInputEvent aInputEvent;
+        aInputEvent.mpTextAttr = nullptr;
+        aInputEvent.mnCursorFlags = 0;
+        aInputEvent.maText = toOUString(pEvent->preeditString());
+        aInputEvent.mnCursorPos = 0;
+
+        const sal_Int32 nLength = aInputEvent.maText.getLength();
+        const QList<QInputMethodEvent::Attribute>& rAttrList = pEvent->attributes();
+        std::vector<ExtTextInputAttr> aTextAttrs(std::max(sal_Int32(1), nLength),
+                                                 ExtTextInputAttr::NONE);
+        aInputEvent.mpTextAttr = aTextAttrs.data();
+
+        for (int i = 0; i < rAttrList.size(); ++i)
+        {
+            const QInputMethodEvent::Attribute& rAttr = rAttrList.at(i);
+            switch (rAttr.type)
+            {
+                case QInputMethodEvent::TextFormat:
+                {
+                    QTextCharFormat aCharFormat
+                        = qvariant_cast<QTextFormat>(rAttr.value).toCharFormat();
+                    if (aCharFormat.isValid())
+                    {
+                        ExtTextInputAttr aETIP
+                            = lcl_MapUndrelineStyle(aCharFormat.underlineStyle());
+                        if (aCharFormat.hasProperty(QTextFormat::BackgroundBrush))
+                            aETIP |= ExtTextInputAttr::Highlight;
+                        if (aCharFormat.fontStrikeOut())
+                            aETIP |= ExtTextInputAttr::RedText;
+                        for (int j = rAttr.start; j < rAttr.start + rAttr.length; j++)
+                            aTextAttrs[j] = aETIP;
+                    }
+                    break;
+                }
+                case QInputMethodEvent::Cursor:
+                {
+                    aInputEvent.mnCursorPos = rAttr.start;
+                    if (rAttr.length == 0)
+                        aInputEvent.mnCursorFlags |= EXTTEXTINPUT_CURSOR_INVISIBLE;
+                    break;
+                }
+                default:
+                    SAL_WARN("vcl.qt5", "Unhandled QInputMethodEvent attribute: "
+                                            << static_cast<int>(rAttr.type));
+                    break;
+            }
+        }
+
+        const bool bIsEmpty = aInputEvent.maText.isEmpty();
+        if (m_bNonEmptyIMPreeditSeen || !bIsEmpty)
+        {
+            SolarMutexGuard aGuard;
+            vcl::DeletionListener aDel(&m_rFrame);
+            m_rFrame.CallCallback(SalEvent::ExtTextInput, &aInputEvent);
+            if (!aDel.isDeleted() && bIsEmpty)
+                m_rFrame.CallCallback(SalEvent::EndExtTextInput, nullptr);
+            m_bNonEmptyIMPreeditSeen = !bIsEmpty;
+        }
+    }
+
+    pEvent->accept();
+}
+
+static bool lcl_retrieveSurrounding(sal_Int32& rPosition, sal_Int32& rAnchor, QString* pText,
+                                    QString* pSelection)
+{
+    SolarMutexGuard aGuard;
+    vcl::Window* pFocusWin = Application::GetFocusWindow();
+    if (!pFocusWin)
+        return false;
+
+    uno::Reference<accessibility::XAccessibleEditableText> xText;
+    try
+    {
+        uno::Reference<accessibility::XAccessible> xAccessible(pFocusWin->GetAccessible());
+        if (xAccessible.is())
+            xText = FindFocusedEditableText(xAccessible->getAccessibleContext());
+    }
+    catch (const uno::Exception&)
+    {
+        TOOLS_WARN_EXCEPTION("vcl.qt5", "Exception in getting input method surrounding text");
+    }
+
+    if (xText.is())
+    {
+        rPosition = xText->getCaretPosition();
+        if (rPosition != -1)
+        {
+            if (pText)
+                *pText = toQString(xText->getText());
+
+            sal_Int32 nSelStart = xText->getSelectionStart();
+            sal_Int32 nSelEnd = xText->getSelectionEnd();
+            if (nSelStart == nSelEnd)
+            {
+                rAnchor = rPosition;
+            }
+            else
+            {
+                if (rPosition == nSelStart)
+                    rAnchor = nSelEnd;
+                else
+                    rAnchor = nSelStart;
+                if (pSelection)
+                    *pSelection = toQString(xText->getSelectedText());
+            }
+            return true;
+        }
+    }
+
+    return false;
+}
+
+QVariant Qt5Widget::inputMethodQuery(Qt::InputMethodQuery property) const
+{
+    switch (property)
+    {
+        case Qt::ImSurroundingText:
+        {
+            QString aText;
+            sal_Int32 nCursorPos, nAnchor;
+            if (lcl_retrieveSurrounding(nCursorPos, nAnchor, &aText, nullptr))
+                return QVariant(aText);
+            [[fallthrough]];
+        }
+        case Qt::ImCursorPosition:
+        {
+            sal_Int32 nCursorPos, nAnchor;
+            if (lcl_retrieveSurrounding(nCursorPos, nAnchor, nullptr, nullptr))
+                return QVariant(static_cast<int>(nCursorPos));
+            [[fallthrough]];
+        }
+        case Qt::ImCursorRectangle:
+        {
+            SalExtTextInputPosEvent aPosEvent;
+            m_rFrame.CallCallback(SalEvent::ExtTextInputPos, &aPosEvent);
+            return QVariant(
+                QRect(aPosEvent.mnX, aPosEvent.mnY, aPosEvent.mnWidth, aPosEvent.mnHeight));
+        }
+        case Qt::ImAnchorPosition:
+        {
+            sal_Int32 nCursorPos, nAnchor;
+            if (lcl_retrieveSurrounding(nCursorPos, nAnchor, nullptr, nullptr))
+                return QVariant(static_cast<int>(nAnchor));
+            [[fallthrough]];
+        }
+        case Qt::ImCurrentSelection:
+        {
+            QString aSelection;
+            sal_Int32 nCursorPos, nAnchor;
+            if (lcl_retrieveSurrounding(nCursorPos, nAnchor, nullptr, &aSelection))
+                return QVariant(aSelection);
+            [[fallthrough]];
+        }
+        default:
+            return QWidget::inputMethodQuery(property);
+    }
+
+    return QVariant();
+}
+
+void Qt5Widget::endExtTextInput()
+{
+    if (m_bNonEmptyIMPreeditSeen)
+    {
+        m_rFrame.CallCallback(SalEvent::EndExtTextInput, nullptr);
+        m_bNonEmptyIMPreeditSeen = false;
+    }
+}
+
+void Qt5Widget::changeEvent(QEvent* pEvent)
+{
+    switch (pEvent->type())
+    {
+        case QEvent::FontChange:
+            [[fallthrough]];
+        case QEvent::PaletteChange:
+            [[fallthrough]];
+        case QEvent::StyleChange:
+        {
+            auto* pSalInst(static_cast<Qt5Instance*>(GetSalData()->m_pInstance));
+            assert(pSalInst);
+            pSalInst->UpdateStyle(QEvent::FontChange == pEvent->type());
+            break;
+        }
+        default:
+            break;
+    }
+    QWidget::changeEvent(pEvent);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */