Bug 1323449 - implement is() method for testing boolean characteristics, r=smaug

accessible/aom/AccessibleNode.cpp

@@ -76,6 +76,33 @@ AccessibleNode::GetStates(nsTArray<nsString>& aStates)
   mStates->Add(NS_LITERAL_STRING("defunct"));
 }
 
+bool
+AccessibleNode::Is(const Sequence<nsString>& aFlavors)
+{
+  if (!mIntl) {
+    for (const auto& flavor : aFlavors) {
+      if (!flavor.EqualsLiteral("unknown") && !flavor.EqualsLiteral("defunct")) {
+        return false;
+      }
+    }
+    return true;
+  }
+
+  nsAutoString role;
+  GetOrCreateAccService()->GetStringRole(mIntl->Role(), role);
+
+  if (!mStates) {
+    mStates = GetOrCreateAccService()->GetStringStates(mIntl->State());
+  }
+
+  for (const auto& flavor : aFlavors) {
+    if (!flavor.Equals(role) && !mStates->Contains(flavor)) {
+      return false;
+    }
+  }
+  return true;
+}
+
 nsINode*
 AccessibleNode::GetDOMNode()
 {

accessible/aom/AccessibleNode.h

@@ -8,9 +8,7 @@
 #define A11Y_AOM_ACCESSIBLENODE_H
 
 #include "nsWrapperCache.h"
-#include "mozilla/RefPtr.h"
-#include "nsTArray.h"
-#include "nsString.h"
+#include "mozilla/dom/BindingDeclarations.h"
 
 class nsINode;
 
@@ -41,6 +39,8 @@ public:
   void GetStates(nsTArray<nsString>& aStates);
   nsINode* GetDOMNode();
 
+  bool Is(const Sequence<nsString>& aFlavors);
+
   a11y::Accessible* Internal() const { return mIntl; }
 
 protected:

accessible/aom/moz.build

@@ -5,11 +5,11 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 EXPORTS.mozilla.dom += [
-    'AccessibleNode.h'
+    'AccessibleNode.h',
 ]
 
 UNIFIED_SOURCES += [
-    'AccessibleNode.cpp'
+    'AccessibleNode.cpp',
 ]
 
 LOCAL_INCLUDES += [

accessible/tests/mochitest/aom/test_general.html

@@ -77,6 +77,9 @@
       }
     }
 
+    ok(anode.is('document', 'focusable'),
+       'correct role and state on an accessible node');
+
     finish();
   }
   </script>

dom/webidl/AccessibleNode.webidl

@@ -10,4 +10,6 @@ interface AccessibleNode {
   [Frozen, Cached, Pure]
   readonly attribute sequence<DOMString> states;
   readonly attribute Node? DOMNode;
+
+  boolean is(DOMString... states);
 };