Implement CSS: scroll-boundary-behavior

third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/css/parser/CSSPropertyParser.h"
 
 #include <memory>
 #include "core/StylePropertyShorthand.h"
 #include "core/css/CSSBasicShapeValues.h"
 #include "core/css/CSSBorderImage.h"
@@ skipping 2429 matching lines @@
 
   AddExpandedPropertyForValue(CSSPropertyBorderWidth, *width, important);
   AddExpandedPropertyForValue(CSSPropertyBorderStyle, *style, important);
   AddExpandedPropertyForValue(CSSPropertyBorderColor, *color, important);
   AddExpandedPropertyForValue(CSSPropertyBorderImage,
                               *CSSInitialValue::Create(), important);
 
   return range_.AtEnd();
 }
 
+bool CSSPropertyParser::Consume2Values(const StylePropertyShorthand& shorthand,
+                                       bool important) {
+  DCHECK_EQ(shorthand.length(), 2u);
+  const CSSPropertyID* longhands = shorthand.properties();
+  const CSSValue* start = ParseSingleValue(longhands[0], shorthand.id());
+  if (!start)
+    return false;
+
+  const CSSValue* end = ParseSingleValue(longhands[1], shorthand.id());
+  if (!end)
+    end = start;
+  AddProperty(longhands[0], shorthand.id(), *start, important);
+  AddProperty(longhands[1], shorthand.id(), *end, important);
+
+  return range_.AtEnd();
+}
+
 bool CSSPropertyParser::Consume4Values(const StylePropertyShorthand& shorthand,
                                        bool important) {
   DCHECK_EQ(shorthand.length(), 4u);
   const CSSPropertyID* longhands = shorthand.properties();
   const CSSValue* top = ParseSingleValue(longhands[0], shorthand.id());
   if (!top)
     return false;
 
   const CSSValue* right = ParseSingleValue(longhands[1], shorthand.id());
   const CSSValue* bottom = nullptr;
@@ skipping 944 matching lines @@
     case CSSPropertyGridTemplate:
       return ConsumeGridTemplateShorthand(CSSPropertyGridTemplate, important);
     case CSSPropertyGrid:
       return ConsumeGridShorthand(important);
     case CSSPropertyPlaceContent:
       return ConsumePlaceContentShorthand(important);
     case CSSPropertyPlaceItems:
       return ConsumePlaceItemsShorthand(important);
     case CSSPropertyPlaceSelf:
       return ConsumePlaceSelfShorthand(important);
+    case CSSPropertyScrollBoundaryBehavior:
+      return Consume2Values(scrollBoundaryBehaviorShorthand(), important);
     default:
       return false;
   }
 }
 
 }  // namespace blink