qt5: Add basic a11y support

Widget tree is displayed and basic role mapping is available.
Still needs quite some work (positions, actions, texts, etc.)

Change-Id: I9d26a762f1d9684f33bbb80a384cf2a0b8a905c0
Reviewed-on: https://gerrit.libreoffice.org/60853
Tested-by: Jenkins
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>

vcl/CustomTarget_qt5_moc.mk

@@ -10,12 +10,14 @@
 $(eval $(call gb_CustomTarget_CustomTarget,vcl/qt5))
 
 $(call gb_CustomTarget_get_target,vcl/qt5) : \
+	$(call gb_CustomTarget_get_workdir,vcl/qt5)/Qt5AccessibleWidget.moc \
 	$(call gb_CustomTarget_get_workdir,vcl/qt5)/Qt5FilePicker.moc \
 	$(call gb_CustomTarget_get_workdir,vcl/qt5)/Qt5Frame.moc \
 	$(call gb_CustomTarget_get_workdir,vcl/qt5)/Qt5Instance.moc \
 	$(call gb_CustomTarget_get_workdir,vcl/qt5)/Qt5MainWindow.moc \
 	$(call gb_CustomTarget_get_workdir,vcl/qt5)/Qt5Menu.moc \
 	$(call gb_CustomTarget_get_workdir,vcl/qt5)/Qt5Timer.moc \
+	$(call gb_CustomTarget_get_workdir,vcl/qt5)/Qt5VclWindow.moc \
 	$(call gb_CustomTarget_get_workdir,vcl/qt5)/Qt5Widget.moc \
 
 $(call gb_CustomTarget_get_workdir,vcl/qt5)/%.moc : \

vcl/Library_vclplug_qt5.mk

@@ -80,6 +80,7 @@ $(eval $(call gb_Library_add_libs,vclplug_qt5,\
 endif
 
 $(eval $(call gb_Library_add_exception_objects,vclplug_qt5,\
+    vcl/qt5/Qt5AccessibleWidget \
     vcl/qt5/Qt5Bitmap \
     vcl/qt5/Qt5Data \
     vcl/qt5/Qt5FilePicker \
@@ -101,6 +102,7 @@ $(eval $(call gb_Library_add_exception_objects,vclplug_qt5,\
     vcl/qt5/Qt5Timer \
     vcl/qt5/Qt5Tools \
     vcl/qt5/Qt5VirtualDevice \
+    vcl/qt5/Qt5VclWindow \
     vcl/qt5/Qt5Widget \
 ))
 

vcl/inc/qt5/Qt5AccessibleWidget.hxx

+/* -*- 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/.
+ */
+
+#pragma once
+
+#include <vclpluginapi.h>
+
+#include <QtCore/QObject>
+#include <QtCore/QPair>
+#include <QtCore/QString>
+#include <QtCore/QStringList>
+#include <QtCore/QVector>
+#include <QtGui/QAccessible>
+#include <QtGui/QAccessibleActionInterface>
+#include <QtGui/QAccessibleInterface>
+#include <QtGui/QColor>
+#include <QtGui/QWindow>
+
+#include <vcl/window.hxx>
+
+class Qt5Frame;
+class Qt5Widget;
+
+class VCLPLUG_QT5_PUBLIC Qt5AccessibleWidget : public QObject, public QAccessibleInterface
+//public QAccessibleActionInterface
+{
+    Q_OBJECT
+
+public:
+    Qt5AccessibleWidget(Qt5Widget* pFrame, vcl::Window* pWindow);
+    Qt5AccessibleWidget(vcl::Window* pWindow);
+    QWindow* window() const override;
+    int childCount() const override;
+    int indexOfChild(const QAccessibleInterface* child) const override;
+    QVector<QPair<QAccessibleInterface*, QAccessible::Relation>>
+    relations(QAccessible::Relation match = QAccessible::AllRelations) const override;
+    QAccessibleInterface* focusChild() const override;
+
+    QRect rect() const override;
+
+    QAccessibleInterface* parent() const override;
+    QAccessibleInterface* child(int index) const override;
+
+    QString text(QAccessible::Text t) const override;
+    QAccessible::Role role() const override;
+    QAccessible::State state() const override;
+
+    QColor foregroundColor() const override;
+    QColor backgroundColor() const override;
+
+    bool isValid() const override;
+    QObject* object() const override;
+    void setText(QAccessible::Text t, const QString& text) override;
+    QAccessibleInterface* childAt(int x, int y) const override;
+
+    void* interface_cast(QAccessible::InterfaceType t) override;
+
+    // QAccessibleActionInterface
+    /*  QStringList actionNames() const override;
+    void doAction(const QString& actionName) override;
+    QStringList keyBindingsForAction(const QString& actionName) const override; */
+
+    // Factory
+    static QAccessibleInterface* customFactory(const QString& classname, QObject* object);
+
+private:
+    Qt5Widget* m_pFrame;
+    VclPtr<vcl::Window> m_pWindow;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */

vcl/inc/qt5/Qt5VclWindow.hxx

+/* -*- 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/.
+ */
+
+#pragma once
+
+#include <vclpluginapi.h>
+
+#include <QtCore/QObject>
+
+#include <vcl/window.hxx>
+
+class Qt5Frame;
+class Qt5Widget;
+
+// Wrapper class to hold a vcl::Window while being able to pass it as a QObject
+class VCLPLUG_QT5_PUBLIC Qt5VclWindow : public QObject
+{
+    Q_OBJECT
+
+public:
+    Qt5VclWindow(vcl::Window* pWindow);
+    VclPtr<vcl::Window> m_pWindow;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */

vcl/inc/qt5/Qt5Widget.hxx

@@ -36,8 +36,6 @@ class Qt5Widget : public QWidget
 {
     Q_OBJECT
 
-    Qt5Frame* m_pFrame;
-
     bool handleKeyEvent(QKeyEvent*, bool);
     void handleMouseButtonEvent(QMouseEvent*, bool);
 
@@ -57,6 +55,7 @@ class Qt5Widget : public QWidget
 
 public:
     Qt5Widget(Qt5Frame& rFrame, Qt::WindowFlags f = Qt::WindowFlags());
+    Qt5Frame* m_pFrame;
 };
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

vcl/qt5/Qt5MainWindow.cxx

@@ -10,13 +10,16 @@
 
 #include <Qt5MainWindow.hxx>
 #include <Qt5MainWindow.moc>
+#include <Qt5AccessibleWidget.hxx>
 
+#include <QtGui/QAccessible>
 #include <QtGui/QCloseEvent>
 
 Qt5MainWindow::Qt5MainWindow(Qt5Frame& rFrame, QWidget* parent, Qt::WindowFlags f)
     : QMainWindow(parent, f)
     , m_pFrame(&rFrame)
 {
+    QAccessible::installFactory(Qt5AccessibleWidget::customFactory);
 }
 
 void Qt5MainWindow::closeEvent(QCloseEvent* pEvent)

vcl/qt5/Qt5VclWindow.cxx

+/* -*- 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/.
+ */
+
+#include <Qt5VclWindow.hxx>
+#include <Qt5VclWindow.moc>
+
+#include <Qt5Frame.hxx>
+#include <Qt5Tools.hxx>
+#include <Qt5Widget.hxx>
+
+#include <sal/log.hxx>
+
+using namespace css::accessibility;
+
+Qt5VclWindow::Qt5VclWindow(vcl::Window* pWindow)
+    : m_pWindow(pWindow)
+{
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */