Implement direction-specific touch-action values (blink side)

Source/core/css/parser/CSSPropertyParser.cpp

 /*
  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
  * Copyright (C) 2012 Intel Corporation. All rights reserved.
  *
@@ skipping 7289 matching lines @@
 PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseTouchAction()
 {
     CSSParserValue* value = m_valueList->current();
     RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
     if (m_valueList->size() == 1 && value && (value->id == CSSValueAuto || value->id == CSSValueNone || value->id == CSSValueManipulation)) {
         list->append(cssValuePool().createIdentifierValue(value->id));
         m_valueList->next();
         return list.release();
     }
 
+    bool xSet = false;
+    bool ySet = false;
     while (value) {
         switch (value->id) {
         case CSSValuePanX:
-        case CSSValuePanY: {
+        case CSSValuePanRight:
+        case CSSValuePanLeft: {
+            if (xSet)
+                return nullptr;
+            xSet = true;
+            if (value->id != CSSValuePanX && !RuntimeEnabledFeatures::cssTouchActionPanDirectionsEnabled())
+                return nullptr;
+
             RefPtrWillBeRawPtr<CSSValue> panValue = cssValuePool().createIdentifierValue(value->id);
-            if (list->hasValue(panValue.get()))
-                return nullptr;
             list->append(panValue.release());
             break;
         }
+        case CSSValuePanY:
+        case CSSValuePanDown:
+        case CSSValuePanUp: {
+            if (ySet)
+                return nullptr;
+            ySet = true;
+            if (value->id != CSSValuePanY && !RuntimeEnabledFeatures::cssTouchActionPanDirectionsEnabled())
+                return nullptr;
+            RefPtrWillBeRawPtr<CSSValue> panValue = cssValuePool().createIdentifierValue(value->id);
+            list->append(panValue.release());
+            break;
+        }
         default:
             return nullptr;
         }
         value = m_valueList->next();
     }
 
     if (list->length())
         return list.release();
 
     return nullptr;
@@ skipping 1076 matching lines @@
         }
     }
 
     if (!list->length())
         return nullptr;
 
     return list.release();
 }
 
 } // namespace blink