Add hittest mode for Touch-action which ignore inline elements and svg elements

Source/core/page/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 3655 matching lines @@
             // Record the originating touch document even if it does not have a touch listener.
             if (freshTouchEvents) {
                 m_originatingTouchPointDocument = &doc;
                 freshTouchEvents = false;
             }
             if (!doc.hasTouchEventHandlers())
                 continue;
             m_originatingTouchPointTargets.set(touchPointTargetKey, node);
             touchTarget = node;
 
             // FIXME(rbyers): Should really be doing a second hit test that ignores inline elements - crbug.com/319479.

[Rick Byers, 2014/02/17 14:44:24]

Oh, and you can remove this FIXME now of course.

[gnana, 2014/02/24 18:59:50]

Done.

-            TouchAction effectiveTouchAction = computeEffectiveTouchAction(*node);
-            if (effectiveTouchAction != TouchActionAuto)
-                m_frame->page()->chrome().client().setTouchAction(effectiveTouchAction);
+            HitTestResult taResult = hitTestResultAtPoint(pagePoint, hitType | HitTestRequest::TouchAction);

[Rick Byers, 2014/02/17 14:43:52]

It's probably worth moving the hit test into computeEffectiveTouchAction (i.e.
have it take a point instead of a Node - I don't think it needs to take the
hitType, a constant should be fine).

[gnana, 2014/02/24 18:59:50]

Done.

+            Node* taNode = taResult.innerNode();
+            if (taNode == node) {

[Rick Byers, 2014/02/17 14:43:52]

You'll need to do this even when the hit test returns a different node than
'node'.  Eg. touching on an inline that contained inside of a block - the
touch-action of the block needs to be applied still.

[gnana, 2014/02/24 18:59:50]

Done.

+                TouchAction effectiveTouchAction = computeEffectiveTouchAction(*taNode);
+                if (effectiveTouchAction != TouchActionAuto)
+                    m_frame->page()->chrome().client().setTouchAction(effectiveTouchAction);
+            }
 
         } else if (pointState == PlatformTouchPoint::TouchReleased || pointState == PlatformTouchPoint::TouchCancelled) {
             // The target should be the original target for this touch, so get it from the hashmap. As it's a release or cancel
             // we also remove it from the map.
             touchTarget = m_originatingTouchPointTargets.take(touchPointTargetKey);
         } else
             // No hittest is performed on move or stationary, since the target is not allowed to change anyway.
             touchTarget = m_originatingTouchPointTargets.get(touchPointTargetKey);
 
         if (!touchTarget.get())
@@ skipping 324 matching lines @@
 unsigned EventHandler::accessKeyModifiers()
 {
 #if OS(MACOSX)
     return PlatformEvent::CtrlKey | PlatformEvent::AltKey;
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
 } // namespace WebCore