accessible/src/msaa/CAccessibleHypertext.cpp

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   4 /* ***** BEGIN LICENSE BLOCK *****
   5  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   6  *
   7  * The contents of this file are subject to the Mozilla Public License Version
   8  * 1.1 (the "License"); you may not use this file except in compliance with
   9  * the License. You may obtain a copy of the License at
  10  * http://www.mozilla.org/MPL/
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  12  * Software distributed under the License is distributed on an "AS IS" basis,
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  17  * The Original Code is mozilla.org code.
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  19  * The Initial Developer of the Original Code is
  20  * Mozilla Foundation.
  21  * Portions created by the Initial Developer are Copyright (C) 2007
  22  * the Initial Developer. All Rights Reserved.
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  24  * Contributor(s):
  25  *   Alexander Surkov <surkov.alexander@gmail.com> (original author)
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  27  * Alternatively, the contents of this file may be used under the terms of
  28  * either the GNU General Public License Version 2 or later (the "GPL"), or
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  39  * ***** END LICENSE BLOCK ***** */
  40
  41 #include "CAccessibleHypertext.h"
  42
  43 #include "AccessibleHypertext_i.c"
  44
  45 #include "nsIAccessibleHypertext.h"
  46 #include "nsIWinAccessNode.h"
  47 #include "nsAccessNodeWrap.h"
  48
  49 #include "nsCOMPtr.h"
  50
  51 // IUnknown
  52
  53 STDMETHODIMP
  54 CAccessibleHypertext::QueryInterface(REFIID iid, void** ppv)
  55 {
  56   *ppv = NULL;
  57   if (IID_IAccessibleHypertext == iid) {
  58     nsCOMPtr<nsIAccessibleHyperText> hyperAcc(do_QueryInterface(this));
  59     if (!hyperAcc)
  60       return E_NOINTERFACE;
  61
  62     *ppv = static_cast<IAccessibleHypertext*>(this);
  63     (reinterpret_cast<IUnknown*>(*ppv))->AddRef();
  64     return S_OK;
  65   }
  66
  67   return CAccessibleText::QueryInterface(iid, ppv);
  68 }
  69
  70 // IAccessibleHypertext
  71
  72 STDMETHODIMP
  73 CAccessibleHypertext::get_nHyperlinks(long *aHyperlinkCount)
  74 {
  75 __try {
  76   *aHyperlinkCount = 0;
  77
  78   nsCOMPtr<nsIAccessibleHyperText> hyperAcc(do_QueryInterface(this));
  79   if (!hyperAcc)
  80     return E_FAIL;
  81
  82   PRInt32 count = 0;
  83   nsresult rv = hyperAcc->GetLinkCount(&count);
  84   if (NS_FAILED(rv))
  85     return GetHRESULT(rv);
  86
  87   *aHyperlinkCount = count;
  88   return S_OK;
  89
  90 } __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }
  91   return E_FAIL;
  92 }
  93
  94 STDMETHODIMP
  95 CAccessibleHypertext::get_hyperlink(long aLinkIndex,
  96                                     IAccessibleHyperlink **aHyperlink)
  97 {
  98 __try {
  99   *aHyperlink = NULL;
 100
 101   nsCOMPtr<nsIAccessibleHyperText> hyperAcc(do_QueryInterface(this));
 102   if (!hyperAcc)
 103     return E_FAIL;
 104
 105   nsCOMPtr<nsIAccessibleHyperLink> hyperLink;
 106   nsresult rv = hyperAcc->GetLink(aLinkIndex, getter_AddRefs(hyperLink));
 107   if (NS_FAILED(rv))
 108     return GetHRESULT(rv);
 109
 110   nsCOMPtr<nsIWinAccessNode> winAccessNode(do_QueryInterface(hyperLink));
 111   if (!winAccessNode)
 112     return E_FAIL;
 113
 114   void *instancePtr = NULL;
 115   rv =  winAccessNode->QueryNativeInterface(IID_IAccessibleHyperlink,
 116                                             &instancePtr);
 117   if (NS_FAILED(rv))
 118     return E_FAIL;
 119
 120   *aHyperlink = static_cast<IAccessibleHyperlink*>(instancePtr);
 121   return S_OK;
 122
 123 } __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }
 124   return E_FAIL;
 125 }
 126
 127 STDMETHODIMP
 128 CAccessibleHypertext::get_hyperlinkIndex(long aCharIndex, long *aHyperlinkIndex)
 129 {
 130 __try {
 131   *aHyperlinkIndex = 0;
 132
 133   nsCOMPtr<nsIAccessibleHyperText> hyperAcc(do_QueryInterface(this));
 134   if (!hyperAcc)
 135     return E_FAIL;
 136
 137   PRInt32 index = 0;
 138   nsresult rv = hyperAcc->GetLinkIndex(aCharIndex, &index);
 139   if (NS_FAILED(rv))
 140     return GetHRESULT(rv);
 141
 142   *aHyperlinkIndex = index;
 143   return S_OK;
 144
 145 } __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }
 146   return E_FAIL;
 147 }
 148