Bug 808596 - Introduce key role. r=surkov

accessible/public/nsIAccessibleRole.idl

@@ -773,5 +773,9 @@ interface nsIAccessibleRole : nsISupports
    * An HTML definition <dd>
    */
   const unsigned long ROLE_DEFINITION = 128;
-};
 
+  /**
+   * A keyboard or keypad key.
+   */
+  const unsigned long ROLE_KEY = 129;
+};

accessible/src/base/ARIAMap.cpp

@@ -222,6 +222,17 @@ static nsRoleMapEntry sWAIRoleMaps[] =
     kGenericAccType,
     kNoReqStates
   },
+  { // key
+    &nsGkAtoms::key,
+    roles::KEY,
+    kUseMapRole,
+    eNoValue,
+    ePressAction,
+    eNoLiveAttr,
+    kGenericAccType,
+    kNoReqStates,
+    eARIAPressed
+  },
   { // link
     &nsGkAtoms::link,
     roles::LINK,

accessible/src/base/Role.h

@@ -778,7 +778,12 @@ enum Role {
   /**
    * Represent a definition in a definition list (dd in HTML)
    */
-  DEFINITION = 128
+  DEFINITION = 128,
+
+  /**
+   * Represent a keyboard or keypad key (ARIA role "key").
+   */
+  KEY = 129
 };
 
 } // namespace role

accessible/src/base/RoleMap.h

@@ -1047,3 +1047,11 @@ ROLE(DEFINITION,
      USE_ROLE_STRING,
      IA2_ROLE_PARAGRAPH,
      eNameFromSubtreeRule)
+
+ROLE(KEY,
+     "key",
+     ATK_ROLE_PUSH_BUTTON,
+     NSAccessibilityButtonRole,
+     ROLE_SYSTEM_PUSHBUTTON,
+     ROLE_SYSTEM_PUSHBUTTON,
+     eNameFromSubtreeRule)