Introduce LayoutObject::AncestorSkipInfo.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc.
  *               All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 2310 matching lines @@
 
 bool LayoutBox::mapToVisualRectInAncestorSpace(
     const LayoutBoxModelObject* ancestor,
     LayoutRect& rect,
     VisualRectFlags visualRectFlags) const {
   inflateVisualRectForFilter(rect);
 
   if (ancestor == this)
     return true;
 
-  bool ancestorSkipped;
-  bool filterSkipped;
-  LayoutObject* container =
-      this->container(ancestor, &ancestorSkipped, &filterSkipped);
+  AncestorSkipInfo skipInfo(ancestor, true);
+  LayoutObject* container = this->container(&skipInfo);
   LayoutBox* tableRowContainer = nullptr;
   // Skip table row because cells and rows are in the same coordinate space (see
   // below, however for more comments about when |ancestor| is the table row).
   if (isTableCell()) {
     DCHECK(container->isTableRow() && parentBox() == container);
     if (container != ancestor)
       container = container->parent();
     else
       tableRowContainer = toLayoutBox(container);
   }
   if (!container)
     return true;
 
-  if (filterSkipped)
+  if (skipInfo.filterSkipped())
     inflateVisualRectForFilterUnderContainer(rect, *container, ancestor);
 
   // We are now in our parent container's coordinate space. Apply our transform
   // to obtain a bounding box in the parent's coordinate space that encloses us.
   if (hasLayer() && layer()->transform()) {
     // Use enclosingIntRect because we cannot properly compute pixel snapping
     // for painted elements within the transform since we don't know the desired
     // subpixel accumulation at this point, and the transform may include a
     // scale.
     rect = LayoutRect(layer()->transform()->mapRect(enclosingIntRect(rect)));
@@ skipping 35 matching lines @@
   // FIXME: We ignore the lightweight clipping rect that controls use, since if
   // |o| is in mid-layout, its controlClipRect will be wrong. For overflow clip
   // we use the values cached by the layer.
   rect.setLocation(topLeft);
 
   if (container->isBox() && container != ancestor &&
       !toLayoutBox(container)->mapScrollingContentsRectToBoxSpace(
           rect, visualRectFlags))
     return false;
 
-  if (ancestorSkipped) {
+  if (skipInfo.ancestorSkipped()) {
     // If the ancestor is below the container, then we need to map the rect into
     // ancestor's coordinates.
     LayoutSize containerOffset =
         ancestor->offsetFromAncestorContainer(container);
     rect.move(-containerOffset);
     // If the ancestor is fixed, then the rect is already in its coordinates so
     // doesn't need viewport-adjusting.
     if (ancestor->style()->position() != FixedPosition &&
         container->isLayoutView() && position == FixedPosition)
       rect.move(toLayoutView(container)->offsetForFixedPosition(true));
@@ skipping 3274 matching lines @@
     block->adjustChildDebugRect(rect);
 
   return rect;
 }
 
 bool LayoutBox::shouldClipOverflow() const {
   return hasOverflowClip() || styleRef().containsPaint() || hasControlClip();
 }
 
 }  // namespace blink