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 "AccObjectManagerAgent.hxx"
  30 #include "unomsaaevent.hxx"
  31
  32 using namespace com::sun::star::uno;
  33 using namespace com::sun::star::accessibility;
  34
  35 AccParagraphEventListener::AccParagraphEventListener(com::sun::star::accessibility::XAccessible* pAcc, AccObjectManagerAgent* Agent)
  36         :AccContainerEventListener(pAcc, Agent)
  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 ::com::sun::star::accessibility::AccessibleEventObject& aEvent )
  47 throw (::com::sun::star::uno::RuntimeException)
  48 {
  49     SolarMutexGuard g;
  50
  51     switch (aEvent.EventId)
  52     {
  53     case AccessibleEventId::CARET_CHANGED:
  54         HandleCaretChangedEvent(aEvent.OldValue, aEvent.NewValue);
  55         break;
  56     case AccessibleEventId::VISIBLE_DATA_CHANGED:
  57         HandleVisibleDataChangedEvent();
  58         break;
  59     case AccessibleEventId::BOUNDRECT_CHANGED:
  60         HandleBoundrectChangedEvent();
  61         break;
  62         //Added for paragraph selected state.
  63     case AccessibleEventId::STATE_CHANGED:
  64         {
  65             short State;
  66             if( (aEvent.NewValue >>= State) && (State == AccessibleStateType::SELECTED) )
  67             {
  68                 pAgent->IncreaseState(m_xAccessible.get(), State);
  69                 break;
  70             }
  71             else if( (aEvent.OldValue >>= State) && (State == AccessibleStateType::SELECTED) )
  72             {
  73                 pAgent->DecreaseState(m_xAccessible.get(), State);
  74                 break;
  75             }
  76
  77             AccContainerEventListener::notifyEvent(aEvent);
  78             break;
  79         }
  80
  81     case AccessibleEventId::TEXT_SELECTION_CHANGED:
  82         HandleTextSelectionChangedEvent();
  83         break;
  84
  85     default:
  86         AccContainerEventListener::notifyEvent(aEvent);
  87         break;
  88     }
  89 }
  90
  91 /**
  92  *  handle the CARET_CHANGED event
  93  *  @param oldValue     in UNO, this parameter is always NULL
  94  *  @param newValue     in UNO, this parameter is always NULL
  95  */
  96 void AccParagraphEventListener::HandleCaretChangedEvent(Any oldValue, Any newValue)
  97 {
  98     pAgent->UpdateLocation(m_xAccessible.get());
  99     pAgent->NotifyAccEvent(UM_EVENT_OBJECT_CARETCHANGE, m_xAccessible.get());
 100 }
 101
 102 /**
 103  *  set the new state and fire the MSAA event
 104  *  @param state    new state id
 105  *  @param enable   true if state is set, false if state is unset
 106  */
 107 void AccParagraphEventListener::SetComponentState(short state, bool enable )
 108 {
 109     // only the following state can be fired state event.
 110     switch (state)
 111     {
 112     case AccessibleStateType::EDITABLE:
 113         // no msaa state
 114         break;
 115     case AccessibleStateType::MULTI_LINE:
 116         // no msaa state mapping
 117         break;
 118     case AccessibleStateType::SINGLE_LINE:
 119         // no msaa state mapping
 120         break;
 121     default:
 122         AccContainerEventListener::SetComponentState(state, enable);
 123         break;
 124     }
 125 }
 126
 127 void AccParagraphEventListener::HandleTextSelectionChangedEvent()
 128 {
 129     pAgent->NotifyAccEvent(UM_EVENT_TEXT_SELECTION_CHANGED, m_xAccessible.get());
 130 }
 131
 132 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */