accessible/src/base/nsAccessibleRelation.cpp

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   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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  20  * the Initial Developer. All Rights Reserved.
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  22  * Contributor(s):
  23  *   Alexander Surkov <surkov.alexander@gmail.com> (original author)
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  26  * either of the GNU General Public License Version 2 or later (the "GPL"),
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  37  * ***** END LICENSE BLOCK ***** */
  38
  39 #include "nsAccessibleRelation.h"
  40
  41 #include "nsIMutableArray.h"
  42 #include "nsComponentManagerUtils.h"
  43
  44 nsAccessibleRelation::
  45   nsAccessibleRelation(PRUint32 aType, nsIAccessible *aTarget) :
  46   mType(aType), mTarget(aTarget)
  47 {
  48 }
  49
  50 // nsISupports
  51 NS_IMPL_ISUPPORTS1(nsAccessibleRelation, nsIAccessibleRelation)
  52
  53 // nsIAccessibleRelation
  54 NS_IMETHODIMP
  55 nsAccessibleRelation::GetRelationType(PRUint32 *aType)
  56 {
  57   NS_ENSURE_ARG_POINTER(aType);
  58
  59   *aType = mType;
  60   return NS_OK;
  61 }
  62
  63 NS_IMETHODIMP
  64 nsAccessibleRelation::GetTargetsCount(PRUint32 *aCount)
  65 {
  66   NS_ENSURE_ARG_POINTER(aCount);
  67
  68   *aCount = 1;
  69   return NS_OK;
  70 }
  71
  72 NS_IMETHODIMP
  73 nsAccessibleRelation::GetTarget(PRUint32 aIndex, nsIAccessible **aTarget)
  74 {
  75   NS_ENSURE_ARG_POINTER(aTarget);
  76
  77   if (aIndex != 0)
  78     return NS_ERROR_INVALID_ARG;
  79
  80   NS_IF_ADDREF(*aTarget = mTarget);
  81   return NS_OK;
  82 }
  83
  84 NS_IMETHODIMP
  85 nsAccessibleRelation::GetTargets(nsIArray **aRelations)
  86 {
  87   NS_ENSURE_ARG_POINTER(aRelations);
  88
  89   nsCOMPtr<nsIMutableArray> relations = do_CreateInstance(NS_ARRAY_CONTRACTID);
  90   NS_ENSURE_TRUE(relations, NS_ERROR_OUT_OF_MEMORY);
  91
  92   relations->AppendElement(mTarget, PR_FALSE);
  93
  94   NS_ADDREF(*aRelations = relations);
  95   return NS_OK;
  96 }