Mac accessibility: Add support for AXDOMIdentifier

content/browser/accessibility/browser_accessibility_cocoa.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "content/browser/accessibility/browser_accessibility_cocoa.h"
 
 #include <execinfo.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <string.h>
@@ skipping 42 matching lines @@
 NSString* const NSAccessibilityARIABusyAttribute = @"AXARIABusy";
 NSString* const NSAccessibilityARIAColumnCountAttribute = @"AXARIAColumnCount";
 NSString* const NSAccessibilityARIAColumnIndexAttribute = @"AXARIAColumnIndex";
 NSString* const NSAccessibilityARIALiveAttribute = @"AXARIALive";
 NSString* const NSAccessibilityARIAPosInSetAttribute = @"AXARIAPosInSet";
 NSString* const NSAccessibilityARIARelevantAttribute = @"AXARIARelevant";
 NSString* const NSAccessibilityARIARowCountAttribute = @"AXARIARowCount";
 NSString* const NSAccessibilityARIARowIndexAttribute = @"AXARIARowIndex";
 NSString* const NSAccessibilityARIASetSizeAttribute = @"AXARIASetSize";
 NSString* const NSAccessibilityAccessKeyAttribute = @"AXAccessKey";
+NSString* const NSAccessibilityDOMIdentifierAttribute = @"AXDOMIdentifier";
 NSString* const NSAccessibilityDropEffectsAttribute = @"AXDropEffects";
 NSString* const NSAccessibilityGrabbedAttribute = @"AXGrabbed";
 NSString* const NSAccessibilityInvalidAttribute = @"AXInvalid";
 NSString* const NSAccessibilityIsMultiSelectableAttribute =
     @"AXIsMultiSelectable";
 NSString* const NSAccessibilityLoadingProgressAttribute = @"AXLoadingProgress";
 NSString* const
     NSAccessibilityUIElementCountForSearchPredicateParameterizedAttribute =
         @"AXUIElementCountForSearchPredicate";
 NSString* const
@@ skipping 472 matching lines @@
       {NSAccessibilityColumnsAttribute, @"columns"},
       {NSAccessibilityColumnHeaderUIElementsAttribute, @"columnHeaders"},
       {NSAccessibilityColumnIndexRangeAttribute, @"columnIndexRange"},
       {NSAccessibilityContentsAttribute, @"contents"},
       {NSAccessibilityDescriptionAttribute, @"description"},
       {NSAccessibilityDisclosingAttribute, @"disclosing"},
       {NSAccessibilityDisclosedByRowAttribute, @"disclosedByRow"},
       {NSAccessibilityDisclosureLevelAttribute, @"disclosureLevel"},
       {NSAccessibilityDisclosedRowsAttribute, @"disclosedRows"},
       {NSAccessibilityDropEffectsAttribute, @"dropEffects"},
+      {NSAccessibilityDOMIdentifierAttribute, @"domIdentifier"},
       {NSAccessibilityEnabledAttribute, @"enabled"},
       {NSAccessibilityEndTextMarkerAttribute, @"endTextMarker"},
       {NSAccessibilityExpandedAttribute, @"expanded"},
       {NSAccessibilityFocusedAttribute, @"focused"},
       {NSAccessibilityGrabbedAttribute, @"grabbed"},
       {NSAccessibilityHeaderAttribute, @"header"},
       {NSAccessibilityHelpAttribute, @"help"},
       {NSAccessibilityIndexAttribute, @"index"},
       {NSAccessibilityInsertionPointLineNumberAttribute,
        @"insertionPointLineNumber"},
@@ skipping 372 matching lines @@
   if (![self instanceActive])
     return nil;
 
   std::string dropEffects;
   if (browserAccessibility_->GetHtmlAttribute("aria-dropeffect", &dropEffects))
     return base::SysUTF8ToNSString(dropEffects);
 
   return nil;
 }
 
+- (NSString*)domIdentifier {
+  if (![self instanceActive])
+    return nil;
+
+  std::string id;
+  if (browserAccessibility_->GetHtmlAttribute("id", &id))
+    return base::SysUTF8ToNSString(id);
+
+  return nil;
+}
+
 - (NSNumber*)enabled {
   if (![self instanceActive])
     return nil;
   return [NSNumber numberWithBool:
       !GetState(browserAccessibility_, ui::AX_STATE_DISABLED)];
 }
 
 // Returns a text marker that points to the last character in the document that
 // can be selected with VoiceOver.
 - (id)endTextMarker {
@@ skipping 1591 matching lines @@
 // Returns the list of accessibility attributes that this object supports.
 - (NSArray*)accessibilityAttributeNames {
   if (![self instanceActive])
     return nil;
 
   // General attributes.
   NSMutableArray* ret = [NSMutableArray
       arrayWithObjects:NSAccessibilityAccessKeyAttribute,
                        NSAccessibilityChildrenAttribute,
                        NSAccessibilityDescriptionAttribute,
+                       NSAccessibilityDOMIdentifierAttribute,
                        NSAccessibilityEnabledAttribute,
                        NSAccessibilityEndTextMarkerAttribute,
                        NSAccessibilityFocusedAttribute,
                        NSAccessibilityHelpAttribute,
                        NSAccessibilityInvalidAttribute,
                        NSAccessibilityLinkedUIElementsAttribute,
                        NSAccessibilityParentAttribute,
                        NSAccessibilityPositionAttribute,
                        NSAccessibilityRoleAttribute,
                        NSAccessibilityRoleDescriptionAttribute,
@@ skipping 304 matching lines @@
 }
 
 - (BOOL)accessibilityNotifiesWhenDestroyed {
   // Indicate that BrowserAccessibilityCocoa will post a notification when it's
   // destroyed (see -detach). This allows VoiceOver to do some internal things
   // more efficiently.
   return YES;
 }
 
 @end