Bug 1050926 - taking into account aria-hidden when traversing subtree. r=eeejay

---
 accessible/jsat/Utils.jsm                        |  4 +++-
 accessible/tests/mochitest/jsat/test_output.html | 13 +++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

accessible/jsat/Utils.jsm

@@ -749,7 +749,9 @@ PivotContext.prototype = {
       if (this._includeInvisible) {
         include = true;
       } else {
-        include = !(Utils.getState(child).contains(States.INVISIBLE));
+        // Need to account for aria-hidden, so can't just check for INVISIBLE
+        // state.
+        include = Utils.getAttributes(child).hidden !== 'true';
       }
       if (include) {
         if (aPreorder) {

accessible/tests/mochitest/jsat/test_output.html

@@ -388,6 +388,13 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=753984
           expectedBraille: [
             [{"string": "listboxoptionAbbr"}, "Search suggestion"],
             ["Search suggestion", {"string": "listboxoptionAbbr"}]]
+        }, {
+          accOrElmOrID: "listbox-option2",
+          oldAccOrElmOrID: "listbox-option",
+          expectedUtterance: [[{"string": "listboxoption"}, "555-12345"],
+                              ["555-12345", {"string": "listboxoption"}]],
+          expectedBraille: [[{"string": "listboxoptionAbbr"}, "555-12345"],
+                            ["555-12345", {"string": "listboxoptionAbbr"}]]
         }];
 
         // Test all possible utterance order preference values.
@@ -507,6 +514,12 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=753984
       <div id="togglebutton_pressed" aria-pressed="true" role="button" tabindex="-1">I am pressed!</div>
       <ul role="listbox" style="list-style-type: none;">
         <li role="option" id="listbox-option">Search suggestion</li>
+        <li role="option" id="listbox-option2">
+          <label aria-hidden="true">
+            <input type="checkbox" />
+          </label>
+          555-12345
+        </li>
       </ul>
     </div>
   </body>