Chromium side Implementation to expose aria properties - setsize & posinset

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.
 
 #include <execinfo.h>
 
 #import "content/browser/accessibility/browser_accessibility_cocoa.h"
 
 #include <map>
 
@@ skipping 90 matching lines @@
     { NSAccessibilityVisibleCharacterRangeAttribute, @"visibleCharacterRange" },
     { NSAccessibilityVisibleCellsAttribute, @"visibleCells" },
     { NSAccessibilityVisibleChildrenAttribute, @"visibleChildren" },
     { NSAccessibilityVisibleColumnsAttribute, @"visibleColumns" },
     { NSAccessibilityVisibleRowsAttribute, @"visibleRows" },
     { NSAccessibilityWindowAttribute, @"window" },
     { @"AXAccessKey", @"accessKey" },
     { @"AXARIAAtomic", @"ariaAtomic" },
     { @"AXARIABusy", @"ariaBusy" },
     { @"AXARIALive", @"ariaLive" },
+    { @"AXARIAPosInSet", @"ariaPosInSet" },
+    { @"AXARIASetSize", @"ariaSetSize" },
     { @"AXARIARelevant", @"ariaRelevant" },
     { @"AXDropEffects", @"dropeffect" },
     { @"AXGrabbed", @"grabbed" },
     { @"AXInvalid", @"invalid" },
     { @"AXLoaded", @"loaded" },
     { @"AXLoadingProgress", @"loadingProgress" },
     { @"AXPlaceholder", @"placeholder" },
     { @"AXRequired", @"required" },
     { @"AXSortDirection", @"sortDirection" },
     { @"AXVisited", @"visited" },
@@ skipping 42 matching lines @@
 - (NSString*)ariaLive {
   return NSStringForStringAttribute(
       browserAccessibility_, ui::AX_ATTR_LIVE_STATUS);
 }
 
 - (NSString*)ariaRelevant {
   return NSStringForStringAttribute(
       browserAccessibility_, ui::AX_ATTR_LIVE_RELEVANT);
 }
 
+- (NSNumber*)ariaPosInSet {
+  return [NSNumber numberWithInt:
+      browserAccessibility_->GetIntAttribute(ui::AX_ATTR_POS_IN_SET)];
+}
+
+- (NSNumber*)ariaSetSize {
+  return [NSNumber numberWithInt:
+      browserAccessibility_->GetIntAttribute(ui::AX_ATTR_SET_SIZE)];
+}
+
 // Returns an array of BrowserAccessibilityCocoa objects, representing the
 // accessibility children of this object.
 - (NSArray*)children {
   if (!children_) {
     uint32 childCount = browserAccessibility_->PlatformChildCount();
     children_.reset([[NSMutableArray alloc] initWithCapacity:childCount]);
     for (uint32 index = 0; index < childCount; ++index) {
       BrowserAccessibilityCocoa* child =
           browserAccessibility_->PlatformGetChild(index)->
               ToBrowserAccessibilityCocoa();
@@ skipping 1121 matching lines @@
       NSAccessibilityPositionAttribute,
       NSAccessibilityRoleAttribute,
       NSAccessibilityRoleDescriptionAttribute,
       NSAccessibilitySizeAttribute,
       NSAccessibilitySubroleAttribute,
       NSAccessibilityTitleAttribute,
       NSAccessibilityTopLevelUIElementAttribute,
       NSAccessibilityValueAttribute,
       NSAccessibilityWindowAttribute,
       @"AXAccessKey",
+      @"AXARIAPosInSet",

[dmazzoni, 2015/04/21 05:56:21]

I think we should only include these if they're relevant. It doesn't make sense
to expose posinset/setsize on all nodes.

I'd do it by checking
browserAccessibility_->HasIntAttribute(ui::AX_ATTR_SET_SIZE) and only add
support for these attributes if that attribute is present, kind of like the
other ones added below.

+      @"AXARIASetSize",
       @"AXInvalid",
       @"AXVisited",
       nil];
 
   // Specific role attributes.
   NSString* role = [self role];
   NSString* subrole = [self subrole];
   if ([role isEqualToString:NSAccessibilityTableRole] ||
       [role isEqualToString:NSAccessibilityGridRole]) {
     [ret addObjectsFromArray:[NSArray arrayWithObjects:
@@ skipping 300 matching lines @@
   if (!browserAccessibility_)
     return [super hash];
   return browserAccessibility_->GetId();
 }
 
 - (BOOL)accessibilityShouldUseUniqueId {
   return YES;
 }
 
 @end