Bug 477599 - Expose ARIA semantics for HTML 5 draggable; r=MarcoZ, r=surkov

accessible/src/base/nsAccessibilityAtomList.h

@@ -164,6 +164,7 @@ ACCESSIBILITY_ATOM(_class, "class")
 ACCESSIBILITY_ATOM(cycles, "cycles") // used for XUL cycler attribute
 ACCESSIBILITY_ATOM(curpos, "curpos") // XUL
 ACCESSIBILITY_ATOM(data, "data")
+ACCESSIBILITY_ATOM(draggable, "draggable")
 ACCESSIBILITY_ATOM(droppable, "droppable")   // XUL combo box
 ACCESSIBILITY_ATOM(editable, "editable")
 ACCESSIBILITY_ATOM(_for, "for")

accessible/src/base/nsAccessible.cpp

@@ -1837,6 +1837,17 @@ nsAccessible::GetAttributesInternal(nsIPersistentProperties *aAttributes)
     nsAccUtils::SetAccAttr(aAttributes, nsAccessibilityAtoms::textIndent,
                            value);
 
+  // Expose draggable object attribute?
+  nsCOMPtr<nsIDOMNSHTMLElement> htmlElement = do_QueryInterface(content);
+  if (htmlElement) {
+    PRBool draggable = PR_FALSE;
+    htmlElement->GetDraggable(&draggable);
+    if (draggable) {
+      nsAccUtils::SetAccAttr(aAttributes, nsAccessibilityAtoms::draggable,
+                             NS_LITERAL_STRING("true"));
+    }
+  }
+
   return NS_OK;
 }
 

accessible/tests/mochitest/test_objectattrs.html

@@ -30,6 +30,7 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=391829
       testAttrs("checkedOption", {"checkable" : "true"}, true); 
       testAttrs("checkedRadio", {"checkable" : "true"}, true); 
       testAttrs("checkedTreeitem", {"checkable" : "true"}, true); 
+      testAttrs("grabbed", {"grabbed" : "true"}, true);
       testAttrs("dropeffect", {"dropeffect" : "copy"}, true);
       testAttrs("sortAscending", {"sort" : "ascending"}, true);
       testAttrs("sortDescending", {"sort" : "descending"}, true);
@@ -76,6 +77,7 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=391829
       // html
       testAttrs("radio", {"checkable" : "true"}, true); 
       testAttrs("checkbox", {"checkable" : "true"}, true); 
+      testAttrs("draggable", {"draggable" : "true"}, true); 
 
       SimpleTest.finish();
     }
@@ -110,6 +112,7 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=391829
   <div id="checkedOption" role="option" aria-checked="true"></div>
   <div id="checkedRadio" role="radio" aria-checked="true"></div>
   <div id="checkedTreeitem" role="treeitem" aria-checked="true"></div>
+  <div id="grabbed" aria-grabbed="true"></div>
   <div id="dropeffect" aria-dropeffect="copy"></div>
   <div id="sortAscending" role="columnheader" aria-sort="ascending"></div>
   <div id="sortDescending" role="columnheader" aria-sort="descending"></div>
@@ -132,5 +135,6 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=391829
   <!-- html -->
   <input id="radio" type="radio"/>
   <input id="checkbox" type="checkbox"/>
+  <div id="draggable" draggable="true">Draggable div</div>
 </body>
 </html>