https://bugs.webkit.org/show_bug.cgi?id=101545

Patch by Varun Jain <varunjain@chromium.org> on 2012-11-26
Reviewed by Antonio Gomes.

For LongPress, we simulate drag by sending a mouse down and mouse drag
events. If a drag is not started (because maybe there is no draggable
element), then we show context menu instead (which is the current
behavior for LongPress). For LongTap, we use the existing functions that
LongPress uses to summon the context menu. LongPress initiated drag and
drop can be enabled/disabled by the platform using the Setting
touchDragDropEnabled which is disabled by default.

Source/WebCore:

Tests: fast/events/touch/gesture/context-menu-on-long-tap.html
       fast/events/touch/gesture/long-press-on-draggable-element-triggers-drag.html

* page/EventHandler.cpp:
(WebCore::EventHandler::EventHandler):
(WebCore::EventHandler::clear):
(WebCore::EventHandler::handleMouseDraggedEvent):
(WebCore::EventHandler::handleGestureEvent):
(WebCore::EventHandler::handleGestureLongPress):
(WebCore::EventHandler::handleGestureLongTap):
(WebCore):
(WebCore::EventHandler::handleGestureForTextSelectionOrContextMenu):
(WebCore::EventHandler::adjustGesturePosition):
(WebCore::EventHandler::handleDrag):
* page/EventHandler.h:
(EventHandler):
* page/Settings.in:

Source/WebKit/chromium:

* public/WebSettings.h:
* src/WebSettingsImpl.cpp:
(WebKit::WebSettingsImpl::setTouchDragDropEnabled):
(WebKit):
* src/WebSettingsImpl.h:
(WebSettingsImpl):

Tools:

* DumpRenderTree/chromium/TestRunner/src/EventSender.cpp:
(WebTestRunner):
(WebTestRunner::EventSender::EventSender):
(WebTestRunner::EventSender::gestureLongTap):
(WebTestRunner::EventSender::gestureEvent):
* DumpRenderTree/chromium/TestRunner/src/EventSender.h:
(EventSender):
* DumpRenderTree/chromium/TestRunner/src/TestRunner.cpp:
(WebTestRunner::TestRunner::TestRunner):
(WebTestRunner::TestRunner::setTouchDragDropEnabled):
(WebTestRunner):
* DumpRenderTree/chromium/TestRunner/src/TestRunner.h:
(TestRunner):

LayoutTests:

* fast/events/touch/gesture/context-menu-on-long-tap.html: Added.
* fast/events/touch/gesture/long-press-on-draggable-element-triggers-drag.html: Added.
* platform/chromium/fast/events/touch/gesture/context-menu-on-long-tap-expected.txt: Added.
* platform/chromium/fast/events/touch/gesture/long-press-on-draggable-element-triggers-drag-expected.txt: Added.
* touchadjustment/touch-links-longpress-expected.txt:
* touchadjustment/touch-links-longpress.html:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@135789 268f45cc-cd09-0410-ab3c-d52691b4dbfc