Intersection Observer support for OOPIF

third_party/WebKit/Source/core/layout/LayoutView.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc.
  *               All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 325 matching lines @@
       if (!(mode & InputIsInFrameCoordinates)) {
         transformState.move(LayoutSize(-frame()->view()->getScrollOffset()));
       } else {
         // The flag applies to immediate LayoutView only.
         mode &= ~InputIsInFrameCoordinates;
       }
 
       transformState.move(parentDocLayoutItem.contentBoxOffset());
 
       parentDocLayoutItem.mapLocalToAncestor(ancestor, transformState, mode);
+    } else if (!document().frame()->isMainFrame()) {
+      // This is the case of a Frame with a remote parent.
+      DCHECK(!ancestor);
+      LayoutRect viewportIntersectionRect(
+          frameView()->remoteViewportIntersection());
+      transformState.move(LayoutSize(-viewportIntersectionRect.x(),
+                                     -viewportIntersectionRect.y()));
     }
   }
 }
 
 const LayoutObject* LayoutView::pushMappingToContainer(
     const LayoutBoxModelObject* ancestorToStopAt,
     LayoutGeometryMap& geometryMap) const {
   LayoutSize offset;
   LayoutObject* container = nullptr;
 
@@ skipping 97 matching lines @@
 
 bool LayoutView::mapToVisualRectInAncestorSpace(
     const LayoutBoxModelObject* ancestor,
     LayoutRect& rect,
     MapCoordinatesFlags mode,
     VisualRectFlags visualRectFlags) const {
   if (mode & IsFixed)
     rect.move(offsetForFixedPosition(true));
 
   // Apply our transform if we have one (because of full page zooming).
-  if (!ancestor && layer() && layer()->transform())
+  if (layer() && layer()->transform())
     rect = layer()->transform()->mapRect(rect);
 
-  ASSERT(ancestor);
   if (ancestor == this)
     return true;
 
   Element* owner = document().localOwner();
-  if (!owner)
+  if (!owner) {
+    // This is the case of a Frame with a remote parent.
+    if (!document().frame()->isMainFrame()) {
+      DCHECK(!ancestor);
+      LayoutRect viewportIntersectionRect(
+          frameView()->remoteViewportIntersection());
+      rect.intersect(viewportIntersectionRect);
+      if (rect.isEmpty())
+        return false;
+    }
     return true;
+  }
 
   if (LayoutBox* obj = owner->layoutBox()) {
     if (!(mode & InputIsInFrameCoordinates)) {
       // Intersect the viewport with the visual rect.
       LayoutRect viewRectangle = viewRect();
       if (visualRectFlags & EdgeInclusive) {
         if (!rect.inclusiveIntersect(viewRectangle))
           return false;
       } else {
         rect.intersect(viewRectangle);
@@ skipping 547 matching lines @@
 bool LayoutView::paintedOutputOfObjectHasNoEffectRegardlessOfSize() const {
   // Frame scroll corner is painted using LayoutView as the display item client.
   if (!RuntimeEnabledFeatures::rootLayerScrollingEnabled() &&
       (frameView()->horizontalScrollbar() || frameView()->verticalScrollbar()))
     return false;
 
   return LayoutBlockFlow::paintedOutputOfObjectHasNoEffectRegardlessOfSize();
 }
 
 }  // namespace blink