Let mapToVisualRectInAncestorSpace apply ancestor clip if not scrollsOverflow

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2006, 2007 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 31 matching lines @@
 enum OverlayScrollbarSizeRelevancy { IgnoreOverlayScrollbarSize, IncludeOverlayScrollbarSize };
 enum MarginDirection { BlockDirection, InlineDirection };
 
 enum ShouldComputePreferred { ComputeActual, ComputePreferred };
 
 enum ScrollOffsetClamping {
     ScrollOffsetUnclamped,
     ScrollOffsetClamped
 };
 
+enum ApplyOverflowClipFlag {
+    ApplyOverflowClip,
+    ApplyNonScrollOverflowClip
+};
+
 struct LayoutBoxRareData {
     WTF_MAKE_NONCOPYABLE(LayoutBoxRareData); USING_FAST_MALLOC(LayoutBoxRareData);
 public:
     LayoutBoxRareData()
         : m_spannerPlaceholder(nullptr)
         , m_overrideLogicalContentHeight(-1)
         , m_overrideLogicalContentWidth(-1)
         , m_previousBorderBoxSize(LayoutUnit(-1), LayoutUnit(-1))
         , m_percentHeightContainer(nullptr)
     {
@@ skipping 766 matching lines @@
     LayoutRect visualOverflowRectForPropagation(const ComputedStyle&) const;
     LayoutRect logicalLayoutOverflowRectForPropagation(const ComputedStyle&) const;
     LayoutRect layoutOverflowRectForPropagation(const ComputedStyle&) const;
 
     bool hasOverflowModel() const { return m_overflow; }
     bool hasVisualOverflow() const { return m_overflow && !borderBoxRect().contains(m_overflow->visualOverflowRect()); }
 
     virtual bool needsPreferredWidthsRecalculation() const;
 
     IntSize scrolledContentOffset() const;
-    void mapScrollingContentsRectToBoxSpace(LayoutRect&) const;
 
-    // Returns true if the rect actually intersects the clipping region.
+    // Maps a rect in scrolling contents space to box space and apply overflow clip if needed.
+    // Returns true if no clipping applied or the rect actually intersects the clipping region.
     // If edgeInclusive is true, then this method may return true even
     // if the resulting rect has zero area.
-    bool applyOverflowClip(LayoutRect&, VisualRectFlags = DefaultVisualRectFlags) const;
+    bool mapScrollingContentsRectToBoxSpace(LayoutRect&, ApplyOverflowClipFlag, VisualRectFlags = DefaultVisualRectFlags) const;
 
     virtual bool hasRelativeLogicalWidth() const;
     virtual bool hasRelativeLogicalHeight() const;
 
     bool hasHorizontalLayoutOverflow() const
     {
         if (!m_overflow)
             return false;
 
         LayoutRect layoutOverflowRect = m_overflow->layoutOverflowRect();
@@ skipping 286 matching lines @@
         || breakValue == BreakLeft
         || breakValue == BreakPage
         || breakValue == BreakRecto
         || breakValue == BreakRight
         || breakValue == BreakVerso;
 }
 
 } // namespace blink
 
 #endif // LayoutBox_h