Bug 1624729 - Add a nativeInterface attribute to nsIAccessible. r=yzen

Differential Revision: https://phabricator.services.mozilla.com/D68122

--HG--
extra : moz-landing-system : lando

accessible/interfaces/nsIAccessible.idl

@@ -172,6 +172,11 @@ interface nsIAccessible : nsISupports
    */
   readonly attribute nsIPersistentProperties attributes;
 
+  /**
+   * Platform specific interface for accessible
+   */
+  readonly attribute nsISupports nativeInterface;
+
   /**
    * Returns grouping information. Used for tree items, list items, tab panel
    * labels, radio buttons, etc. Also used for collectons of non-text objects.

accessible/xpcom/xpcAccessible.cpp

@@ -383,6 +383,11 @@ xpcAccessible::GetAttributes(nsIPersistentProperties** aAttributes) {
   return NS_OK;
 }
 
+NS_IMETHODIMP
+xpcAccessible::GetNativeInterface(nsISupports** aNativeInterface) {
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
 NS_IMETHODIMP
 xpcAccessible::GetBounds(int32_t* aX, int32_t* aY, int32_t* aWidth,
                          int32_t* aHeight) {

accessible/xpcom/xpcAccessible.h

@@ -52,6 +52,9 @@ class xpcAccessible : public nsIAccessible {
   NS_IMETHOD GetKeyboardShortcut(nsAString& aKeyBinding) final;
 
   NS_IMETHOD GetAttributes(nsIPersistentProperties** aAttributes) final;
+
+  NS_IMETHOD GetNativeInterface(nsISupports** aNativeInterface) final;
+
   NS_IMETHOD GetBounds(int32_t* aX, int32_t* aY, int32_t* aWidth,
                        int32_t* aHeight) final;
   NS_IMETHOD GetBoundsInCSSPixels(int32_t* aX, int32_t* aY, int32_t* aWidth,