Allow paint invalidation containers to cross frame boundaries. (re-land #2)

Source/core/rendering/RenderObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 48 matching lines @@
 #include "core/rendering/RenderFlowThread.h"
 #include "core/rendering/RenderGeometryMap.h"
 #include "core/rendering/RenderGrid.h"
 #include "core/rendering/RenderImage.h"
 #include "core/rendering/RenderImageResourceStyleImage.h"
 #include "core/rendering/RenderInline.h"
 #include "core/rendering/RenderLayer.h"
 #include "core/rendering/RenderListItem.h"
 #include "core/rendering/RenderMarquee.h"
 #include "core/rendering/RenderObjectInlines.h"
+#include "core/rendering/RenderPart.h"
 #include "core/rendering/RenderScrollbarPart.h"
 #include "core/rendering/RenderTableCaption.h"
 #include "core/rendering/RenderTableCell.h"
 #include "core/rendering/RenderTableCol.h"
 #include "core/rendering/RenderTableRow.h"
 #include "core/rendering/RenderTheme.h"
 #include "core/rendering/RenderView.h"
 #include "core/rendering/compositing/CompositedLayerMapping.h"
 #include "core/rendering/compositing/RenderLayerCompositor.h"
 #include "core/rendering/style/ContentData.h"
@@ skipping 1354 matching lines @@
 {
     if (!isRooted())
         return 0;
 
     return adjustCompositedContainerForSpecialAncestors(enclosingCompositedContainer());
 }
 
 const RenderLayerModelObject* RenderObject::enclosingCompositedContainer() const
 {
     RenderLayerModelObject* container = 0;
-    if (view()->usesCompositing()) {
-        // FIXME: CompositingState is not necessarily up to date for many callers of this function.
-        DisableCompositingQueryAsserts disabler;
+    // FIXME: CompositingState is not necessarily up to date for many callers of this function.
+    DisableCompositingQueryAsserts disabler;
 
-        if (RenderLayer* compositingLayer = enclosingLayer()->enclosingLayerForPaintInvalidation())
-            container = compositingLayer->renderer();
-    }
+    if (RenderLayer* compositingLayer = enclosingLayer()->enclosingLayerForPaintInvalidationCrossingFrameBoundaries())
+        container = compositingLayer->renderer();
     return container;
 }
 
 const RenderLayerModelObject* RenderObject::adjustCompositedContainerForSpecialAncestors(const RenderLayerModelObject* paintInvalidationContainer) const
 {
 
     if (document().view()->hasSoftwareFilters()) {
         if (RenderLayer* enclosingFilterLayer = enclosingLayer()->enclosingFilterLayer())
             return enclosingFilterLayer->renderer();
     }
 
     // If we have a flow thread, then we need to do individual paint invalidations within the RenderRegions instead.
     // Return the flow thread as a paint invalidation container in order to create a chokepoint that allows us to change
     // paint invalidation to do individual region paint invalidations.
     if (RenderFlowThread* parentRenderFlowThread = flowThreadContainingBlock()) {
         // If we have already found a paint invalidation container then we will invalidate paints in that container only if it is part of the same
         // flow thread. Otherwise we will need to catch the paint invalidation call and send it to the flow thread.
         if (!paintInvalidationContainer || paintInvalidationContainer->flowThreadContainingBlock() != parentRenderFlowThread)
             paintInvalidationContainer = parentRenderFlowThread;
     }
-    return paintInvalidationContainer ? paintInvalidationContainer : view();
+
+    if (paintInvalidationContainer)
+        return paintInvalidationContainer;
+
+    RenderView* renderView = view();
+    while (renderView->frame()->ownerRenderer())
+        renderView = renderView->frame()->ownerRenderer()->view();
+    return renderView;
 }
 
 bool RenderObject::isPaintInvalidationContainer() const
 {
     return hasLayer() && toRenderLayerModelObject(this)->layer()->isPaintInvalidationContainer();
 }
 
 template <typename T>
 void addJsonObjectForRect(TracedValue* value, const char* name, const T& rect)
 {
@@ skipping 38 matching lines @@
     if (paintInvalidationContainer->isRenderFlowThread()) {
         toRenderFlowThread(paintInvalidationContainer)->paintInvalidationRectangleInRegions(r);
         return;
     }
 
     if (paintInvalidationContainer->hasFilter() && paintInvalidationContainer->layer()->requiresFullLayerImageForFilters()) {
         paintInvalidationContainer->layer()->paintInvalidator().setFilterBackendNeedsPaintInvalidationInRect(r);
         return;
     }
 
-    RenderView* v = view();
     if (paintInvalidationContainer->isRenderView()) {
-        ASSERT(paintInvalidationContainer == v);
-        v->invalidatePaintForRectangle(r);
+        toRenderView(paintInvalidationContainer)->invalidatePaintForRectangle(r);
         return;
     }
-
-    if (v->usesCompositing()) {
+    if (paintInvalidationContainer->view()->usesCompositing()) {
         ASSERT(paintInvalidationContainer->hasLayer() && (paintInvalidationContainer->layer()->compositingState() == PaintsIntoOwnBacking || paintInvalidationContainer->layer()->compositingState() == PaintsIntoGroupedBacking));
         paintInvalidationContainer->layer()->paintInvalidator().setBackingNeedsPaintInvalidationInRect(r);
     }
 }
 
 void RenderObject::invalidatePaintForWholeRenderer() const
 {
     if (!isRooted())
         return;
 
@@ skipping 210 matching lines @@
     return !document().view()->needsFullPaintInvalidation() && everHadLayout();
 }
 
 LayoutRect RenderObject::rectWithOutlineForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, LayoutUnit outlineWidth, const PaintInvalidationState* paintInvalidationState) const
 {
     LayoutRect r(clippedOverflowRectForPaintInvalidation(paintInvalidationContainer, paintInvalidationState));
     r.inflate(outlineWidth);
     return r;
 }
 
+LayoutRect RenderObject::absoluteClippedOverflowRect() const
+{
+    return clippedOverflowRectForPaintInvalidation(view());
+}
+
 LayoutRect RenderObject::clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject*, const PaintInvalidationState*) const
 {
     ASSERT_NOT_REACHED();
     return LayoutRect();
 }
 
 void RenderObject::mapRectToPaintInvalidationBacking(const RenderLayerModelObject* paintInvalidationContainer, LayoutRect& rect, ViewportConstrainedPosition, const PaintInvalidationState* paintInvalidationState) const
 {
     if (paintInvalidationContainer == this)
         return;
@@ skipping 1697 matching lines @@
 {
     if (object1) {
         const blink::RenderObject* root = object1;
         while (root->parent())
             root = root->parent();
         root->showRenderTreeAndMark(object1, "*", object2, "-", 0);
     }
 }
 
 #endif