Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

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

1 files changed, 260 insertions, 0 deletions

diff --git a/winaccessibility/source/service/AccEventListener.cxx b/winaccessibility/source/service/AccEventListener.cxx
new file mode 100644
index 000000000..fd8636099
--- /dev/null
+++ b/winaccessibility/source/service/AccEventListener.cxx
@@ -0,0 +1,260 @@
+/* -*- 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 <cppuhelper/bootstrap.hxx>
+#include <com/sun/star/bridge/XUnoUrlResolver.hpp>
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+
+#include <vcl/svapp.hxx>
+
+#include <AccEventListener.hxx>
+#include <AccObjectManagerAgent.hxx>
+#include <unomsaaevent.hxx>
+
+#include <com/sun/star/accessibility/XAccessible.hpp>
+#include <com/sun/star/accessibility/AccessibleStateType.hpp>
+#include <com/sun/star/accessibility/AccessibleEventId.hpp>
+#include <com/sun/star/accessibility/AccessibleRole.hpp>
+#include <com/sun/star/accessibility/XAccessibleEventBroadcaster.hpp>
+#include <com/sun/star/accessibility/XAccessibleComponent.hpp>
+
+#include <stdio.h>
+
+using namespace com::sun::star::uno;
+using namespace com::sun::star::accessibility;
+using namespace cppu;
+
+AccEventListener::AccEventListener(css::accessibility::XAccessible* pAcc,
+                                   AccObjectManagerAgent* Agent)
+    : m_xAccessible(pAcc)
+    , pAgent(Agent)
+{
+}
+
+AccEventListener::~AccEventListener() {}
+
+/**
+ *  Uno's event notifier when event is captured
+ *  @param AccessibleEventObject    the event object which contains information about event
+ */
+void AccEventListener::notifyEvent(const css::accessibility::AccessibleEventObject& aEvent)
+{
+    SolarMutexGuard g;
+
+    switch (aEvent.EventId)
+    {
+        case AccessibleEventId::NAME_CHANGED:
+            HandleNameChangedEvent(aEvent.NewValue);
+            break;
+        case AccessibleEventId::DESCRIPTION_CHANGED:
+            HandleDescriptionChangedEvent();
+            break;
+        case AccessibleEventId::STATE_CHANGED:
+            HandleStateChangedEvent(aEvent.OldValue, aEvent.NewValue);
+            break;
+        default:
+            break;
+    }
+}
+
+/**
+ *  handle the NAME_CHANGED event
+ *  @param  name        the new name with changed.
+ */
+void AccEventListener::HandleNameChangedEvent(Any name)
+{
+    if (pAgent->IsTopWinAcc(m_xAccessible.get()))
+    {
+        XAccessible* pAccDoc = pAgent->GetAccDocByAccTopWin(m_xAccessible.get());
+        if (pAccDoc)
+        {
+            pAgent->UpdateAccName(pAccDoc);
+            pAgent->NotifyAccEvent(UnoMSAAEvent::OBJECT_NAMECHANGE, pAccDoc);
+        }
+    }
+
+    pAgent->UpdateAccName(m_xAccessible.get(), name);
+    pAgent->NotifyAccEvent(UnoMSAAEvent::OBJECT_NAMECHANGE, m_xAccessible.get());
+}
+
+/**
+ *  handle the DESCRIPTION_CHANGED event
+ */
+void AccEventListener::HandleDescriptionChangedEvent()
+{
+    pAgent->NotifyAccEvent(UnoMSAAEvent::OBJECT_DESCRIPTIONCHANGE, m_xAccessible.get());
+}
+
+/**
+ *  handle the BOUNDRECT_CHANGED event
+ */
+void AccEventListener::HandleBoundrectChangedEvent()
+{
+    AccObjectManagerAgent::UpdateLocation(m_xAccessible.get());
+    pAgent->NotifyAccEvent(UnoMSAAEvent::BOUNDRECT_CHANGED, m_xAccessible.get());
+}
+
+/**
+ *  handle the VISIBLE_DATA_CHANGED event
+ */
+void AccEventListener::HandleVisibleDataChangedEvent()
+{
+    pAgent->UpdateValue(m_xAccessible.get());
+    pAgent->NotifyAccEvent(UnoMSAAEvent::VISIBLE_DATA_CHANGED, m_xAccessible.get());
+}
+
+/**
+ *  handle the STATE_CHANGED event
+ *  @param  oldValue    the old state of the source of event
+ *  @param  newValue    the new state of the source of event
+ */
+void AccEventListener::HandleStateChangedEvent(Any oldValue, Any newValue)
+{
+    short newV, oldV;
+    if (newValue >>= newV)
+    {
+        SetComponentState(newV, true);
+    }
+    else if (oldValue >>= oldV)
+    {
+        SetComponentState(oldV, false);
+    }
+}
+
+/**
+ *  set the new state and fire the MSAA event
+ *  @param  state       new state id
+ *  @param  enable      true if state is set, false if state is unset
+ */
+void AccEventListener::SetComponentState(short state, bool enable)
+{
+    switch (state)
+    {
+        case AccessibleStateType::FOCUSED:
+            FireStateFocusedChange(enable);
+            break;
+        default:
+            FireStatePropertyChange(state, enable);
+            break;
+    }
+}
+
+/**
+ *  handle the focused event
+ *  @param enable   true if get focus, false if lose focus
+ */
+void AccEventListener::FireStateFocusedChange(bool enable)
+{
+    if (enable)
+    {
+        pAgent->IncreaseState(m_xAccessible.get(), AccessibleStateType::FOCUSED);
+        pAgent->NotifyAccEvent(UnoMSAAEvent::STATE_FOCUSED, m_xAccessible.get());
+    }
+    else
+    {
+        // no focus lost event in MSAA
+    }
+}
+
+/**
+ *  fire the MSAA state changed event
+ *  @param state    the state id
+ *  @param set      true if state is set, false if state is unset
+ */
+void AccEventListener::FireStatePropertyChange(short /*state*/, bool set)
+{
+    if (set)
+    {
+        //get new state
+    }
+    else
+    {
+        //lose old state
+    }
+}
+
+/**
+ *  get the role of accessible object which is observed
+ */
+short AccEventListener::GetRole()
+{
+    css::uno::Reference<css::accessibility::XAccessibleContext> const xContext(
+        m_xAccessible->getAccessibleContext());
+    if (xContext.is())
+    {
+        return xContext->getAccessibleRole();
+    }
+    return -1;
+}
+
+/**
+ *  get the role of accessible parent object which is observed
+ */
+short AccEventListener::GetParentRole()
+{
+    if (m_xAccessible.is())
+    {
+        return pAgent->GetParentRole(m_xAccessible.get());
+    }
+    return -1;
+}
+/**
+ *  remove the listener from accessible object
+ */
+void AccEventListener::RemoveMeFromBroadcaster()
+{
+    try
+    {
+        if (!m_xAccessible.is())
+        {
+            return;
+        }
+        try
+        {
+            css::uno::Reference<XAccessibleEventBroadcaster> const xBroadcaster(
+                m_xAccessible->getAccessibleContext(), UNO_QUERY);
+            if (xBroadcaster.is())
+            {
+                //remove the lister from accessible object
+                xBroadcaster->removeAccessibleEventListener(this);
+            }
+        }
+        catch (Exception const&)
+        { // may throw if it's already disposed - ignore that
+        }
+        pAgent->NotifyDestroy(m_xAccessible.get());
+        m_xAccessible.clear(); // release cyclic reference
+    }
+    catch (...)
+    {
+        return;
+    }
+}
+
+/**
+ *  this method is invoked before listener is disposed
+ */
+void AccEventListener::disposing(const css::lang::EventObject& /*Source*/)
+{
+    SolarMutexGuard g;
+
+    RemoveMeFromBroadcaster();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */