Move GraphicsLayerUpdater::rebuildTree into its own file

Source/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp

 /*
  * Copyright (C) 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
-#include "core/rendering/compositing/GraphicsLayerUpdater.h"
+#include "core/rendering/compositing/GraphicsLayerTreeBuilder.h"
 
 #include "core/html/HTMLMediaElement.h"
 #include "core/rendering/RenderLayer.h"
 #include "core/rendering/RenderLayerReflectionInfo.h"
 #include "core/rendering/RenderPart.h"
+#include "core/rendering/RenderView.h"
 #include "core/rendering/compositing/CompositedLayerMapping.h"
 #include "core/rendering/compositing/RenderLayerCompositor.h"
 
 namespace WebCore {
 
+GraphicsLayerTreeBuilder::GraphicsLayerTreeBuilder()
+{
+}
+
+GraphicsLayerTreeBuilder::~GraphicsLayerTreeBuilder()
+{
+}
+
 static bool shouldAppendLayer(const RenderLayer& layer)
 {
     if (!RuntimeEnabledFeatures::overlayFullscreenVideoEnabled())
         return true;
     Node* node = layer.renderer()->node();
     if (node && isHTMLMediaElement(*node) && toHTMLMediaElement(node)->isFullscreen())
         return false;
     return true;
 }
 
-GraphicsLayerUpdater::UpdateContext::UpdateContext(const UpdateContext& other, const RenderLayer& layer)
-    : m_compositingStackingContext(other.m_compositingStackingContext)
-    , m_compositingAncestor(other.compositingContainer(layer))
-{
-    CompositingState compositingState = layer.compositingState();
-    if (compositingState != NotComposited && compositingState != PaintsIntoGroupedBacking) {
-        m_compositingAncestor = &layer;
-        if (layer.stackingNode()->isStackingContext())
-            m_compositingStackingContext = &layer;
-    }
-}
-
-const RenderLayer* GraphicsLayerUpdater::UpdateContext::compositingContainer(const RenderLayer& layer) const
-{
-    return layer.stackingNode()->isNormalFlowOnly() ? m_compositingAncestor : m_compositingStackingContext;
-}
-
-GraphicsLayerUpdater::GraphicsLayerUpdater()
-    : m_needsRebuildTree(false)
-{
-}
-
-GraphicsLayerUpdater::~GraphicsLayerUpdater()
-{
-}
-
-void GraphicsLayerUpdater::rebuildTree(RenderLayer& layer, GraphicsLayerVector& childLayersOfEnclosingLayer)
+void GraphicsLayerTreeBuilder::rebuild(RenderLayer& layer, GraphicsLayerVector& childLayersOfEnclosingLayer)
 {
     // Make the layer compositing if necessary, and set up clipping and content layers.
     // Note that we can only do work here that is independent of whether the descendant layers
     // have been processed. computeCompositingRequirements() will already have done the repaint if necessary.
 
     layer.stackingNode()->updateLayerListsIfNeeded();
 
     const bool hasCompositedLayerMapping = layer.hasCompositedLayerMapping();
     CompositedLayerMappingPtr currentCompositedLayerMapping = layer.compositedLayerMapping();
 
     // If this layer has a compositedLayerMapping, then that is where we place subsequent children GraphicsLayers.
     // Otherwise children continue to append to the child list of the enclosing layer.
     GraphicsLayerVector layerChildren;
     GraphicsLayerVector& childList = hasCompositedLayerMapping ? layerChildren : childLayersOfEnclosingLayer;
 
 #if !ASSERT_DISABLED
     LayerListMutationDetector mutationChecker(layer.stackingNode());
 #endif
 
     if (layer.stackingNode()->isStackingContext()) {
         RenderLayerStackingNodeIterator iterator(*layer.stackingNode(), NegativeZOrderChildren);
         while (RenderLayerStackingNode* curNode = iterator.next())
-            rebuildTree(*curNode->layer(), childList);
+            rebuild(*curNode->layer(), childList);
 
         // If a negative z-order child is compositing, we get a foreground layer which needs to get parented.
         if (hasCompositedLayerMapping && currentCompositedLayerMapping->foregroundLayer())
             childList.append(currentCompositedLayerMapping->foregroundLayer());
     }
 
     RenderLayerStackingNodeIterator iterator(*layer.stackingNode(), NormalFlowChildren | PositiveZOrderChildren);
     while (RenderLayerStackingNode* curNode = iterator.next())
-        rebuildTree(*curNode->layer(), childList);
+        rebuild(*curNode->layer(), childList);
 
     if (hasCompositedLayerMapping) {
         bool parented = false;
         if (layer.renderer()->isRenderPart())
             parented = RenderLayerCompositor::parentFrameContentLayers(toRenderPart(layer.renderer()));
 
         if (!parented)
             currentCompositedLayerMapping->parentForSublayers()->setChildren(layerChildren);
 
         // If the layer has a clipping layer the overflow controls layers will be siblings of the clipping layer.
@@ skipping 13 matching lines @@
                 overflowControlLayer->removeFromParent();
                 currentCompositedLayerMapping->parentForSublayers()->addChild(overflowControlLayer);
             }
         }
 
         if (shouldAppendLayer(layer))
             childLayersOfEnclosingLayer.append(currentCompositedLayerMapping->childForSuperlayers());
     }
 }
 
-void GraphicsLayerUpdater::update(RenderLayer& layer, UpdateType updateType, const UpdateContext& context)
-{
-    if (layer.hasCompositedLayerMapping()) {
-        CompositedLayerMappingPtr mapping = layer.compositedLayerMapping();
-
-        const RenderLayer* compositingContainer = context.compositingContainer(layer);
-        ASSERT(compositingContainer == layer.ancestorCompositingLayer());
-        if (mapping->updateRequiresOwnBackingStoreForAncestorReasons(compositingContainer))
-            updateType = ForceUpdate;
-
-        // Note carefully: here we assume that the compositing state of all descendants have been updated already,
-        // so it is legitimate to compute and cache the composited bounds for this layer.
-        mapping->updateCompositedBounds(updateType);
-
-        if (RenderLayerReflectionInfo* reflection = layer.reflectionInfo()) {
-            if (reflection->reflectionLayer()->hasCompositedLayerMapping())
-                reflection->reflectionLayer()->compositedLayerMapping()->updateCompositedBounds(ForceUpdate);
-        }
-
-        if (mapping->updateGraphicsLayerConfiguration(updateType))
-            m_needsRebuildTree = true;
-
-        mapping->updateGraphicsLayerGeometry(updateType, compositingContainer);
-
-        updateType = mapping->updateTypeForChildren(updateType);
-        mapping->clearNeedsGraphicsLayerUpdate();
-
-        if (!layer.parent())
-            layer.compositor()->updateRootLayerPosition();
-
-        if (mapping->hasUnpositionedOverflowControlsLayers())
-            layer.scrollableArea()->positionOverflowControls();
-    }
-
-    UpdateContext childContext(context, layer);
-    for (RenderLayer* child = layer.firstChild(); child; child = child->nextSibling())
-        update(*child, updateType, childContext);
 }
-
-#if !ASSERT_DISABLED
-
-void GraphicsLayerUpdater::assertNeedsToUpdateGraphicsLayerBitsCleared(RenderLayer& layer)
-{
-    if (layer.hasCompositedLayerMapping())
-        layer.compositedLayerMapping()->assertNeedsToUpdateGraphicsLayerBitsCleared();
-
-    for (RenderLayer* child = layer.firstChild(); child; child = child->nextSibling())
-        assertNeedsToUpdateGraphicsLayerBitsCleared(*child);
-}
-
-#endif
-
-} // namespace WebCore