[WIP] Migrate Fullscreen to use top layer instead of RenderFullScreen

Source/core/dom/FullscreenElementStack.cpp

Index: Source/core/dom/FullscreenElementStack.cpp
diff --git a/Source/core/dom/FullscreenElementStack.cpp b/Source/core/dom/FullscreenElementStack.cpp
index 03f1982866201014a82f54c660e3f7cd74725317..ab4442f516af5a292468e6e6a8bc54bc1cdb109f 100644
--- a/Source/core/dom/FullscreenElementStack.cpp
+++ b/Source/core/dom/FullscreenElementStack.cpp
@@ -119,9 +119,6 @@ void FullscreenElementStack::documentWasDetached()
 {
     m_fullScreenChangeEventTargetQueue.clear();
     m_fullScreenErrorEventTargetQueue.clear();
-
-    if (m_fullScreenRenderer)
-        setFullScreenRenderer(0);
 }
 
 void FullscreenElementStack::documentWasDisposed()
@@ -264,6 +261,13 @@ void FullscreenElementStack::webkitCancelFullScreen()
     Vector<RefPtr<Element> > replacementFullscreenElementStack;
     replacementFullscreenElementStack.append(fullscreenElementFrom(document()->topDocument()));
     FullscreenElementStack* topFullscreenElementStack = from(document()->topDocument());
+    Vector<RefPtr<Element> >::iterator end = topFullscreenElementStack->m_fullScreenElementStack.end();
+    // FIXME: This will remove a modal full screen dialog from the top layer. Do
+    // we care about this case? Really we shouldn't have separate vectors for
+    // full screen element stack and top layer.
+    for (Vector<RefPtr<Element> >::iterator iter = topFullscreenElementStack->m_fullScreenElementStack.begin(); iter + 1 < end; ++iter) {
+        topFullscreenElementStack->document()->removeFromTopLayer(iter->get());
+    }
     topFullscreenElementStack->m_fullScreenElementStack.swap(replacementFullscreenElementStack);
     topFullscreenElementStack->webkitExitFullscreen();
 }
@@ -358,25 +362,8 @@ void FullscreenElementStack::webkitWillEnterFullScreenForElement(Element* elemen
     ASSERT(document()->settings()); // If we're active we must have settings.
     ASSERT(document()->settings()->fullScreenEnabled());
 
-    if (m_fullScreenRenderer)
-        m_fullScreenRenderer->unwrapRenderer();
-
     m_fullScreenElement = element;
-
-    // Create a placeholder block for a the full-screen element, to keep the page from reflowing
-    // when the element is removed from the normal flow. Only do this for a RenderBox, as only
-    // a box will have a frameRect. The placeholder will be created in setFullScreenRenderer()
-    // during layout.
-    RenderObject* renderer = m_fullScreenElement->renderer();
-    bool shouldCreatePlaceholder = renderer && renderer->isBox();
-    if (shouldCreatePlaceholder) {
-        m_savedPlaceholderFrameRect = toRenderBox(renderer)->frameRect();
-        m_savedPlaceholderRenderStyle = RenderStyle::clone(renderer->style());
-    }
-
-    if (m_fullScreenElement != document()->documentElement())
-        RenderFullScreen::wrapRenderer(renderer, renderer ? renderer->parent() : 0, document());
-
+    document()->addToTopLayer(element);
     m_fullScreenElement->setContainsFullScreenElementOnAncestorsCrossingFrameBoundaries(true);
 
     document()->recalcStyle(Force);
@@ -403,6 +390,7 @@ void FullscreenElementStack::webkitWillExitFullScreenForElement(Element*)
     if (!document()->isActive())
         return;
 
+    document()->removeFromTopLayer(m_fullScreenElement.get());
     m_fullScreenElement->willStopBeingFullscreenElement();
 }
 
@@ -418,9 +406,6 @@ void FullscreenElementStack::webkitDidExitFullScreenForElement(Element*)
 
     m_areKeysEnabledInFullScreen = false;
 
-    if (m_fullScreenRenderer)
-        m_fullScreenRenderer->unwrapRenderer();
-
     m_fullScreenElement = 0;
     document()->setNeedsStyleRecalc();
 
@@ -433,30 +418,6 @@ void FullscreenElementStack::webkitDidExitFullScreenForElement(Element*)
     from(exitingDocument)->m_fullScreenChangeDelayTimer.startOneShot(0);
 }
 
-void FullscreenElementStack::setFullScreenRenderer(RenderFullScreen* renderer)
-{
-    if (renderer == m_fullScreenRenderer)
-        return;
-
-    if (renderer && m_savedPlaceholderRenderStyle) {
-        renderer->createPlaceholder(m_savedPlaceholderRenderStyle.release(), m_savedPlaceholderFrameRect);
-    } else if (renderer && m_fullScreenRenderer && m_fullScreenRenderer->placeholder()) {
-        RenderBlock* placeholder = m_fullScreenRenderer->placeholder();
-        renderer->createPlaceholder(RenderStyle::clone(placeholder->style()), placeholder->frameRect());
-    }
-
-    if (m_fullScreenRenderer)
-        m_fullScreenRenderer->destroy();
-    ASSERT(!m_fullScreenRenderer);
-
-    m_fullScreenRenderer = renderer;
-}
-
-void FullscreenElementStack::fullScreenRendererDestroyed()
-{
-    m_fullScreenRenderer = 0;
-}
-
 void FullscreenElementStack::fullScreenChangeDelayTimerFired(Timer<FullscreenElementStack>*)
 {
     // Since we dispatch events in this function, it's possible that the
@@ -528,6 +489,9 @@ void FullscreenElementStack::removeFullScreenElementOfSubtree(Node* node, bool a
 
 void FullscreenElementStack::clearFullscreenElementStack()
 {
+    Vector<RefPtr<Element> >::iterator end = m_fullScreenElementStack.end();
+    for (Vector<RefPtr<Element> >::iterator iter = m_fullScreenElementStack.begin(); iter != end; ++iter)
+        document()->removeFromTopLayer(iter->get());
     m_fullScreenElementStack.clear();
 }
 
@@ -536,11 +500,14 @@ void FullscreenElementStack::popFullscreenElementStack()
     if (m_fullScreenElementStack.isEmpty())
         return;
 
+    RefPtr<Element> element = m_fullScreenElementStack.last();
     m_fullScreenElementStack.removeLast();
+    document()->removeFromTopLayer(element.get());
 }
 
 void FullscreenElementStack::pushFullscreenElementStack(Element* element)
 {
+    document()->addToTopLayer(element);
     m_fullScreenElementStack.append(element);
 }