winaccessibility/source/service/AccParagraphEventListener.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <com/sun/star/accessibility/XAccessible.hpp>
  21 #include <com/sun/star/accessibility/AccessibleStateType.hpp>
  22 #include <com/sun/star/accessibility/AccessibleEventId.hpp>
  23 #include <com/sun/star/accessibility/AccessibleRole.hpp>
  24 #include <com/sun/star/accessibility/XAccessibleEventBroadcaster.hpp>
  25
  26 #include <vcl/svapp.hxx>
  27
  28 #include <AccParagraphEventListener.hxx>
  29 #include <AccObjectWinManager.hxx>
  30 #include <unomsaaevent.hxx>
  31
  32 using namespace com::sun::star::uno;
  33 using namespace com::sun::star::accessibility;
  34
  35 AccParagraphEventListener::AccParagraphEventListener(css::accessibility::XAccessible* pAcc, AccObjectWinManager& rManager)
  36         :AccContainerEventListener(pAcc, rManager)
  37 {}
  38 AccParagraphEventListener::~AccParagraphEventListener()
  39 {
  40 }
  41
  42 /**
  43  *  Uno's event notifier when event is captured
  44  *  @param AccessibleEventObject    the event object which contains information about event
  45  */
  46 void  AccParagraphEventListener::notifyEvent( const css::accessibility::AccessibleEventObject& aEvent )
  47 {
  48     SolarMutexGuard g;
  49
  50     switch (aEvent.EventId)
  51     {
  52     case AccessibleEventId::CARET_CHANGED:
  53         HandleCaretChangedEvent(aEvent.OldValue, aEvent.NewValue);
  54         break;
  55     case AccessibleEventId::VISIBLE_DATA_CHANGED:
  56         HandleVisibleDataChangedEvent();
  57         break;
  58     case AccessibleEventId::BOUNDRECT_CHANGED:
  59         HandleBoundrectChangedEvent();
  60         break;
  61         //Added for paragraph selected state.
  62     case AccessibleEventId::STATE_CHANGED:
  63         {
  64             sal_Int64 State;
  65             if( (aEvent.NewValue >>= State) && (State == AccessibleStateType::SELECTED) )
  66             {
  67                 m_rObjManager.IncreaseState(m_xAccessible.get(), State);
  68                 break;
  69             }
  70             else if( (aEvent.OldValue >>= State) && (State == AccessibleStateType::SELECTED) )
  71             {
  72                 m_rObjManager.DecreaseState(m_xAccessible.get(), State);
  73                 break;
  74             }
  75
  76             AccContainerEventListener::notifyEvent(aEvent);
  77             break;
  78         }
  79
  80     case AccessibleEventId::TEXT_SELECTION_CHANGED:
  81         HandleTextSelectionChangedEvent();
  82         break;
  83
  84     default:
  85         AccContainerEventListener::notifyEvent(aEvent);
  86         break;
  87     }
  88 }
  89
  90 /**
  91  *  handle the CARET_CHANGED event
  92  *  @param oldValue     in UNO, this parameter is always NULL
  93  *  @param newValue     in UNO, this parameter is always NULL
  94  */
  95 void AccParagraphEventListener::HandleCaretChangedEvent(Any, Any)
  96 {
  97     m_rObjManager.NotifyAccEvent(m_xAccessible.get(), UnoMSAAEvent::OBJECT_CARETCHANGE);
  98 }
  99
 100 /**
 101  *  set the new state and fire the MSAA event
 102  *  @param state    new state id
 103  *  @param enable   true if state is set, false if state is unset
 104  */
 105 void AccParagraphEventListener::SetComponentState(sal_Int64 state, bool enable )
 106 {
 107     // only the following state can be fired state event.
 108     switch (state)
 109     {
 110     case AccessibleStateType::EDITABLE:
 111         // no msaa state
 112         break;
 113     case AccessibleStateType::MULTI_LINE:
 114         // no msaa state mapping
 115         break;
 116     case AccessibleStateType::SINGLE_LINE:
 117         // no msaa state mapping
 118         break;
 119     default:
 120         AccContainerEventListener::SetComponentState(state, enable);
 121         break;
 122     }
 123 }
 124
 125 void AccParagraphEventListener::HandleTextSelectionChangedEvent()
 126 {
 127     m_rObjManager.NotifyAccEvent(m_xAccessible.get(), UnoMSAAEvent::TEXT_SELECTION_CHANGED);
 128 }
 129
 130 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */