LayoutBox::mapContentsRectToVisibleRectInBorderBoxSpace()

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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 473 matching lines @@
 bool LayoutView::mapToVisibleRectInAncestorSpace(const LayoutBoxModelObject* ancestor, LayoutRect& rect, VisibleRectFlags visibleRectFlags) const
 {
     return mapToVisibleRectInAncestorSpace(ancestor, rect, 0, visibleRectFlags);
 }
 
 bool LayoutView::mapToVisibleRectInAncestorSpace(const LayoutBoxModelObject* ancestor, LayoutRect& rect, MapCoordinatesFlags mode, VisibleRectFlags visibleRectFlags) const
 {
     if (document().printing())
         return true;
 
-    if (style()->isFlippedBlocksWritingMode()) {

[chrishtr, 2016/03/28 20:38:59]

This is handled by LayoutBox somehow?

Is this tested? Add a unittest?

[Xianzhu, 2016/03/28 21:12:08]

Can a LayoutView have writing-mode?

[chrishtr, 2016/03/28 22:09:58]

I think so. IIRC I added this code a month or so ago.

[trchen, 2016/03/28 22:22:42]

Yes, LayoutView back-inherits the writing mode from html/body.

-        // We have to flip by hand since the view's logical height has not been determined.  We
-        // can use the viewport width and height.
-        if (style()->isHorizontalWritingMode())
-            rect.setY(viewHeight() - rect.maxY());
-        else
-            rect.setX(viewWidth() - rect.maxX());
-    }
-
     if (mode & IsFixed)
         adjustOffsetForFixedPosition(rect);
 
     // Apply our transform if we have one (because of full page zooming).
     if (!ancestor && layer() && layer()->transform())
         rect = layer()->transform()->mapRect(rect);
 
     ASSERT(ancestor);
     if (ancestor == this)
         return true;
@@ skipping 525 matching lines @@
 
 ScrollResult LayoutView::scroll(ScrollGranularity granularity, const FloatSize& delta)
 {
     if (!frameView())
         return ScrollResult();
 
     return frame()->applyScrollDelta(granularity, delta, false);
 }
 
 } // namespace blink