qt5 a11y: Add event notifications

Change-Id: Idb2fb2f880b4e848adc213a4e2cea33c5eb56f05
Reviewed-on: https://gerrit.libreoffice.org/61424
Tested-by: Jenkins
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>

4 files changed, 223 insertions, 0 deletions

diff --git a/vcl/Library_vclplug_qt5.mk b/vcl/Library_vclplug_qt5.mk
index 1bb360e2a760..a57fd53ddf24 100644
--- a/vcl/Library_vclplug_qt5.mk
+++ b/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/Qt5AccessibleEventListener \
     vcl/qt5/Qt5AccessibleText \
     vcl/qt5/Qt5AccessibleValue \
     vcl/qt5/Qt5AccessibleWidget \
diff --git a/vcl/inc/qt5/Qt5AccessibleEventListener.hxx b/vcl/inc/qt5/Qt5AccessibleEventListener.hxx
new file mode 100644
index 000000000000..69fd3968540c
--- /dev/null
+++ b/vcl/inc/qt5/Qt5AccessibleEventListener.hxx
@@ -0,0 +1,38 @@
+/* -*- 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 <com/sun/star/accessibility/XAccessible.hpp>
+#include <com/sun/star/accessibility/XAccessibleEventListener.hpp>
+#include <com/sun/star/lang/EventObject.hpp>
+
+#include "Qt5AccessibleWidget.hxx"
+
+#include <cppuhelper/implbase.hxx>
+
+class Qt5AccessibleEventListener
+    : public cppu::WeakImplHelper<css::accessibility::XAccessibleEventListener>
+{
+public:
+    Qt5AccessibleEventListener(
+        const css::uno::Reference<css::accessibility::XAccessible> xAccessible,
+        Qt5AccessibleWidget* pAccessibleWidget);
+
+    virtual void SAL_CALL
+    notifyEvent(const css::accessibility::AccessibleEventObject& aEvent) override;
+
+    virtual void SAL_CALL disposing(const css::lang::EventObject& Source) override;
+
+private:
+    css::uno::Reference<css::accessibility::XAccessible> m_xAccessible;
+    Qt5AccessibleWidget* m_pAccessibleWidget;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/qt5/Qt5AccessibleEventListener.cxx b/vcl/qt5/Qt5AccessibleEventListener.cxx
new file mode 100644
index 000000000000..48a9442b60ce
--- /dev/null
+++ b/vcl/qt5/Qt5AccessibleEventListener.cxx
@@ -0,0 +1,173 @@
+/* -*- 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 <Qt5AccessibleEventListener.hxx>
+
+#include <sal/log.hxx>
+
+#include <com/sun/star/accessibility/AccessibleEventId.hpp>
+
+#include <QtGui/QAccessible>
+
+using namespace css;
+using namespace css::accessibility;
+using namespace css::lang;
+using namespace css::uno;
+
+Qt5AccessibleEventListener::Qt5AccessibleEventListener(const Reference<XAccessible> xAccessible,
+                                                       Qt5AccessibleWidget* pAccessibleWidget)
+    : m_xAccessible(xAccessible)
+    , m_pAccessibleWidget(pAccessibleWidget)
+{
+}
+
+void Qt5AccessibleEventListener::notifyEvent(
+    const css::accessibility::AccessibleEventObject& aEvent)
+{
+    QAccessibleInterface* pQAccessibleInterface
+        = static_cast<QAccessibleInterface*>(m_pAccessibleWidget);
+
+    Reference<XAccessible> xChild;
+    switch (aEvent.EventId)
+    {
+        case AccessibleEventId::NAME_CHANGED:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::NameChanged));
+            return;
+        case AccessibleEventId::DESCRIPTION_CHANGED:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::DescriptionChanged));
+            return;
+        case AccessibleEventId::ACTION_CHANGED:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::ActionChanged));
+            return;
+        case AccessibleEventId::ACTIVE_DESCENDANT_CHANGED:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::ActiveDescendantChanged));
+            return;
+        case AccessibleEventId::CHILD:
+            QAccessible::Event event;
+            if (aEvent.OldValue >>= xChild)
+                event = QAccessible::ObjectDestroyed;
+            if (aEvent.NewValue >>= xChild)
+                event = QAccessible::ObjectCreated;
+            if (event)
+                QAccessible::updateAccessibility(
+                    new QAccessibleEvent(pQAccessibleInterface, event));
+            return;
+        case AccessibleEventId::SELECTION_CHANGED:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::Selection));
+            return;
+        case AccessibleEventId::VISIBLE_DATA_CHANGED:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::VisibleDataChanged));
+            return;
+        case AccessibleEventId::TEXT_SELECTION_CHANGED:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::Selection));
+            return;
+        case AccessibleEventId::TEXT_ATTRIBUTE_CHANGED:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::AttributeChanged));
+            return;
+        case AccessibleEventId::TABLE_CAPTION_CHANGED:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::TableCaptionChanged));
+            return;
+        case AccessibleEventId::TABLE_COLUMN_DESCRIPTION_CHANGED:
+            QAccessible::updateAccessibility(new QAccessibleEvent(
+                pQAccessibleInterface, QAccessible::TableColumnDescriptionChanged));
+            return;
+        case AccessibleEventId::TABLE_COLUMN_HEADER_CHANGED:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::TableColumnHeaderChanged));
+            return;
+        case AccessibleEventId::TABLE_ROW_DESCRIPTION_CHANGED:
+            QAccessible::updateAccessibility(new QAccessibleEvent(
+                pQAccessibleInterface, QAccessible::TableRowDescriptionChanged));
+            return;
+        case AccessibleEventId::TABLE_ROW_HEADER_CHANGED:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::TableRowHeaderChanged));
+            return;
+        case AccessibleEventId::TABLE_SUMMARY_CHANGED:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::TableSummaryChanged));
+            return;
+        case AccessibleEventId::SELECTION_CHANGED_ADD:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::SelectionAdd));
+            return;
+        case AccessibleEventId::SELECTION_CHANGED_REMOVE:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::SelectionRemove));
+            return;
+        case AccessibleEventId::SELECTION_CHANGED_WITHIN:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::SelectionWithin));
+            return;
+        case AccessibleEventId::PAGE_CHANGED:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::PageChanged));
+            return;
+        case AccessibleEventId::SECTION_CHANGED:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::SectionChanged));
+            return;
+        case AccessibleEventId::COLUMN_CHANGED:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::TextColumnChanged));
+            return;
+        case AccessibleEventId::BOUNDRECT_CHANGED:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::LocationChanged));
+            return;
+        case AccessibleEventId::STATE_CHANGED:
+            QAccessible::updateAccessibility(
+                new QAccessibleEvent(pQAccessibleInterface, QAccessible::ForegroundChanged));
+            return;
+        case AccessibleEventId::ROLE_CHANGED:
+        case AccessibleEventId::INVALIDATE_ALL_CHILDREN:
+        case AccessibleEventId::VALUE_CHANGED:
+        case AccessibleEventId::CONTENT_FLOWS_FROM_RELATION_CHANGED:
+        case AccessibleEventId::CONTENT_FLOWS_TO_RELATION_CHANGED:
+        case AccessibleEventId::CONTROLLED_BY_RELATION_CHANGED:
+        case AccessibleEventId::CONTROLLER_FOR_RELATION_CHANGED:
+        case AccessibleEventId::LABEL_FOR_RELATION_CHANGED:
+        case AccessibleEventId::LABELED_BY_RELATION_CHANGED:
+        case AccessibleEventId::MEMBER_OF_RELATION_CHANGED:
+        case AccessibleEventId::SUB_WINDOW_OF_RELATION_CHANGED:
+        case AccessibleEventId::CARET_CHANGED:
+        case AccessibleEventId::TEXT_CHANGED:
+        case AccessibleEventId::HYPERTEXT_CHANGED:
+        case AccessibleEventId::TABLE_MODEL_CHANGED:
+        case AccessibleEventId::LISTBOX_ENTRY_EXPANDED:
+        case AccessibleEventId::LISTBOX_ENTRY_COLLAPSED:
+        case AccessibleEventId::ACTIVE_DESCENDANT_CHANGED_NOFOCUS:
+        default:
+            SAL_WARN("vcl.qt5", "Unmapped AccessibleEventId: " << aEvent.EventId);
+            return;
+    }
+}
+
+void Qt5AccessibleEventListener::disposing(const EventObject& /* Source */) {}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/qt5/Qt5AccessibleWidget.cxx b/vcl/qt5/Qt5AccessibleWidget.cxx
index 748dda66f625..dbfa9ed57897 100644
--- a/vcl/qt5/Qt5AccessibleWidget.cxx
+++ b/vcl/qt5/Qt5AccessibleWidget.cxx
@@ -28,6 +28,7 @@
 #include <Qt5XAccessible.hxx>
 #include <Qt5AccessibleText.hxx>
 #include <Qt5AccessibleValue.hxx>
+#include <Qt5AccessibleEventListener.hxx>
 
 #include <com/sun/star/accessibility/AccessibleRelationType.hpp>
 #include <com/sun/star/accessibility/AccessibleRole.hpp>
@@ -38,6 +39,8 @@
 #include <com/sun/star/accessibility/XAccessibleKeyBinding.hpp>
 #include <com/sun/star/accessibility/XAccessibleRelationSet.hpp>
 #include <com/sun/star/accessibility/XAccessibleStateSet.hpp>
+#include <com/sun/star/accessibility/XAccessibleEventBroadcaster.hpp>
+#include <com/sun/star/accessibility/XAccessibleEventListener.hpp>
 #include <com/sun/star/uno/Sequence.hxx>
 
 #include <comphelper/AccessibleImplementationHelper.hxx>
@@ -51,6 +54,14 @@ using namespace css::uno;
 Qt5AccessibleWidget::Qt5AccessibleWidget(const Reference<XAccessible> xAccessible)
     : m_xAccessible(xAccessible)
 {
+    Reference<XAccessibleContext> xContext(xAccessible, UNO_QUERY);
+    Reference<XAccessibleEventBroadcaster> xBroadcaster(xContext, UNO_QUERY);
+    if (xBroadcaster.is())
+    {
+        Reference<XAccessibleEventListener> xListener(
+            new Qt5AccessibleEventListener(xAccessible, this));
+        xBroadcaster->addAccessibleEventListener(xListener);
+    }
 }
 
 QWindow* Qt5AccessibleWidget::window() const { return nullptr; }