Added CSSPropertyAPI and CSS padding properties which implement this API

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 "core/StylePropertyShorthand.h"
 #include "core/css/CSSBasicShapeValues.h"
 #include "core/css/CSSBorderImage.h"
 #include "core/css/CSSContentDistributionValue.h"
@@ skipping 22 matching lines @@
 #include "core/css/CSSUnicodeRangeValue.h"
 #include "core/css/CSSUnsetValue.h"
 #include "core/css/CSSValuePair.h"
 #include "core/css/CSSVariableReferenceValue.h"
 #include "core/css/FontFace.h"
 #include "core/css/HashTools.h"
 #include "core/css/parser/CSSParserFastPaths.h"
 #include "core/css/parser/CSSParserIdioms.h"
 #include "core/css/parser/CSSPropertyParserHelpers.h"
 #include "core/css/parser/CSSVariableParser.h"
+#include "core/css/properties/CSSPropertyDescriptor.h"
 #include "core/frame/UseCounter.h"
 #include "core/layout/LayoutTheme.h"
 #include "core/svg/SVGPathUtilities.h"
 #include "wtf/text/StringBuilder.h"
 #include <memory>
 
 namespace blink {
 
 using namespace CSSPropertyParserHelpers;
 
@@ skipping 3365 matching lines @@
     CSSPropertyID currentShorthand) {
   CSSPropertyID property = resolveCSSPropertyID(unresolvedProperty);
   if (CSSParserFastPaths::isKeywordPropertyID(property)) {
     if (!CSSParserFastPaths::isValidKeywordPropertyAndValue(
             property, m_range.peek().id(), m_context.mode()))
       return nullptr;
     countKeywordOnlyPropertyUsage(property, m_context.useCounter(),
                                   m_range.peek().id());
     return consumeIdent(m_range);
   }
+
+  // Gets the parsing function for our current property from the property API.
+  // If it has been implemented, we call this function, otherwise we manually
+  // parse this value in the switch statement below. As we implement APIs for
+  // other properties, those properties will be taken out of the switch
+  // statement.
+  const CSSPropertyDescriptor& cssPropertyDesc =
+      CSSPropertyDescriptor::get(property);
+  if (cssPropertyDesc.temporaryCanReadValue)
+    return cssPropertyDesc.parseSingleValue(m_range, m_context);
+
   switch (property) {
     case CSSPropertyWillChange:
       return consumeWillChange(m_range);
     case CSSPropertyPage:
       return consumePage(m_range);
     case CSSPropertyQuotes:
       return consumeQuotes(m_range);
     case CSSPropertyWebkitHighlight:
       return consumeWebkitHighlight(m_range);
     case CSSPropertyFontVariantCaps:
@@ skipping 70 matching lines @@
     case CSSPropertyWebkitMarginAfter:
       return consumeMarginOrOffset(m_range, m_context.mode(),
                                    UnitlessQuirk::Forbid);
     case CSSPropertyPaddingTop:
     case CSSPropertyPaddingRight:
     case CSSPropertyPaddingBottom:
     case CSSPropertyPaddingLeft:
       return consumeLengthOrPercent(m_range, m_context.mode(),
                                     ValueRangeNonNegative,
                                     UnitlessQuirk::Allow);
-    case CSSPropertyWebkitPaddingStart:
-    case CSSPropertyWebkitPaddingEnd:
-    case CSSPropertyWebkitPaddingBefore:
-    case CSSPropertyWebkitPaddingAfter:
-      return consumeLengthOrPercent(m_range, m_context.mode(),
-                                    ValueRangeNonNegative,
-                                    UnitlessQuirk::Forbid);
     case CSSPropertyClip:
       return consumeClip(m_range, m_context.mode());
     case CSSPropertyTouchAction:
       return consumeTouchAction(m_range);
     case CSSPropertyScrollSnapDestination:
     case CSSPropertyObjectPosition:
     case CSSPropertyPerspectiveOrigin:
       return consumePosition(m_range, m_context.mode(), UnitlessQuirk::Forbid);
     case CSSPropertyWebkitLineClamp:
       return consumeLineClamp(m_range);
@@ skipping 1794 matching lines @@
     case CSSPropertyGridTemplate:
       return consumeGridTemplateShorthand(CSSPropertyGridTemplate, important);
     case CSSPropertyGrid:
       return consumeGridShorthand(important);
     default:
       return false;
   }
 }
 
 }  // namespace blink