Fix for https://bugs.webkit.org/show_bug.cgi?id=56493 Drag-scrolling overlay
scrollbars thumb in overflow regions does not work
-and corresponding-
<rdar://problem/9112688> Drag-scrolling overlay scrollbars thumb in overflow
regions does not work
Reviewed by Darin Adler.
Up until now, overlay scrollbars have always been treated in the Render Tree as if
they have a thickness of 0 because they should not affect layout. However, it is
important to consider their size when hit-testing because otherwise, we have this
bug! This patch adds a boolean parameter to overflowClipRect(),
RenderLayer::verticalScrollbarWidth(), and
RenderLayer::horizontalScrollbarHeight(). This bool indicates whether to include
the actual overlay scrollbar thickness. It defaults to false and is only sent is
as true from RenderBloc::nodeAtPoint().
* rendering/RenderBlock.cpp:
(WebCore::RenderBlock::nodeAtPoint):
* rendering/RenderBox.cpp:
(WebCore::RenderBox::overflowClipRect):
* rendering/RenderBox.h:
* rendering/RenderLayer.cpp:
(WebCore::RenderLayer::verticalScrollbarWidth):
(WebCore::RenderLayer::horizontalScrollbarHeight):
* rendering/RenderLayer.h:
* rendering/RenderTable.cpp:
(WebCore::RenderTable::overflowClipRect):
* rendering/RenderTable.h:
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@81304 268f45cc-cd09-0410-ab3c-d52691b4dbfc
8 files changed
