https://bugs.webkit.org/show_bug.cgi?id=83428

Patch by Zalan Bujtas <zbujtas@gmail.com> on 2012-04-12
Reviewed by Kenneth Rohde Christiansen.

Source/WebCore:

When delegate scrolling is on, the frame view needs to ignore scrolling offset when converting
coordinates. It is already done at ScrollView base class and this patch copies the logic to the
FrameView subclass.
Also make sure that TouchAdjustment's findBest*() functions' return value are not ignored by the caller.

Test: touchadjustment/iframe-with-mainframe-scroll-offset.html

* page/EventHandler.cpp:
(WebCore::EventHandler::bestClickableNodeForTouchPoint):
(WebCore::EventHandler::bestZoomableAreaForTouchPoint):
* page/EventHandler.h:
(EventHandler):
* page/FrameView.cpp:
(WebCore::FrameView::convertFromRenderer):
(WebCore::FrameView::convertToRenderer):
* page/GestureTapHighlighter.cpp:
* testing/Internals.cpp:
(WebCore::Internals::setDelegatesScrolling):
(WebCore::Internals::touchPositionAdjustedToBestClickableNode):
(WebCore::Internals::bestZoomableAreaForTouchPoint):
* testing/Internals.h:
(Internals):
* testing/Internals.idl:

Source/WebKit2:

When delegate scrolling is on, the frame view needs to ignore scrolling offset when converting
coordinates. It is already done at ScrollView base class and this patch copies the logic to the
FrameView subclass.
Also make sure that TouchAdjustment's findBest*() functions' return value are not ignored by the caller.

* WebProcess/WebPage/WebPage.cpp:
(WebKit::WebPage::highlightPotentialActivation):
(WebKit::WebPage::findZoomableAreaForPoint):

LayoutTests:

* touchadjustment/scroll-delegation/iframe-with-mainframe-scroll-offset-expected.txt: Added.
* touchadjustment/scroll-delegation/iframe-with-mainframe-scroll-offset.html: Added.
* touchadjustment/zoom-basic.html:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@113962 268f45cc-cd09-0410-ab3c-d52691b4dbfc