Bug 1126230 part 6 - Add nsIDocument::GetFullscreenStack() method. r=smaug

--HG--
extra : source : fd0e6295736145ff6189b04d1ebc1948c3b5a3c3

dom/base/nsDocument.cpp

@@ -11441,6 +11441,19 @@ nsDocument::FullScreenStackTop()
   return element;
 }
 
+/* virtual */ nsTArray<Element*>
+nsDocument::GetFullscreenStack() const
+{
+  nsTArray<Element*> elements;
+  for (const nsWeakPtr& ptr : mFullScreenStack) {
+    if (nsCOMPtr<Element> elem = do_QueryReferent(ptr)) {
+      MOZ_ASSERT(elem->State().HasState(NS_EVENT_STATE_FULL_SCREEN));
+      elements.AppendElement(elem);
+    }
+  }
+  return elements;
+}
+
 // Returns true if aDoc is in the focused tab in the active window.
 static bool
 IsInActiveTab(nsIDocument* aDoc)

dom/base/nsDocument.h

@@ -1207,6 +1207,7 @@ public:
   virtual Element* FindImageMap(const nsAString& aNormalizedMapName) override;
 
   virtual Element* GetFullScreenElement() override;
+  virtual nsTArray<Element*> GetFullscreenStack() const override;
   virtual void AsyncRequestFullScreen(
     mozilla::UniquePtr<FullscreenRequest>&& aRequest) override;
   virtual void RestorePreviousFullScreenState() override;

dom/base/nsIDocument.h

@@ -155,8 +155,8 @@ typedef CallbackObjectHolder<NodeFilter, nsIDOMNodeFilter> NodeFilterHolder;
 } // namespace mozilla
 
 #define NS_IDOCUMENT_IID \
-{ 0x72391609, 0x673d, 0x4bec, \
-  { 0xbd, 0x75, 0x64, 0xbf, 0x1f, 0x6a, 0x6b, 0x5e } }
+{ 0x5f51e18c, 0x9e0e, 0x4dc0, \
+  { 0x9f, 0x08, 0x7a, 0x32, 0x65, 0x52, 0xea, 0x11 } }
 
 // Enum for requesting a particular type of document when creating a doc
 enum DocumentFlavor {
@@ -1094,6 +1094,11 @@ public:
    */
   virtual Element* GetFullScreenElement() = 0;
 
+  /**
+   * Returns all elements in the fullscreen stack in the insertion order.
+   */
+  virtual nsTArray<Element*> GetFullscreenStack() const = 0;
+
   /**
    * Asynchronously requests that the document make aElement the fullscreen
    * element, and move into fullscreen mode. The current fullscreen element