Expose custom property values to getComputedStyle.

third_party/WebKit/Source/core/css/ComputedStyleCSSValueMapping.cpp

 /*
  * Copyright (C) 2004 Zack Rusin <zack@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2011 Sencha, Inc. All rights reserved.
  * Copyright (C) 2015 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ skipping 14 matching lines @@
 #include "config.h"
 #include "core/css/ComputedStyleCSSValueMapping.h"
 
 #include "core/StylePropertyShorthand.h"
 #include "core/css/BasicShapeFunctions.h"
 #include "core/css/CSSBasicShapeValues.h"
 #include "core/css/CSSBorderImage.h"
 #include "core/css/CSSBorderImageSliceValue.h"
 #include "core/css/CSSCounterValue.h"
 #include "core/css/CSSCustomIdentValue.h"
+#include "core/css/CSSCustomPropertyDeclaration.h"
 #include "core/css/CSSFontFeatureValue.h"
 #include "core/css/CSSFunctionValue.h"
 #include "core/css/CSSGridLineNamesValue.h"
 #include "core/css/CSSGridTemplateAreasValue.h"
 #include "core/css/CSSPathValue.h"
 #include "core/css/CSSPrimitiveValueMappings.h"
 #include "core/css/CSSQuadValue.h"
 #include "core/css/CSSReflectValue.h"
 #include "core/css/CSSShadowValue.h"
 #include "core/css/CSSStringValue.h"
@@ skipping 1301 matching lines @@
     for (auto& coordinate : coordinates) {
         auto pair = CSSValueList::createSpaceSeparated();
         pair->append(zoomAdjustedPixelValueForLength(coordinate.x(), style));
         pair->append(zoomAdjustedPixelValueForLength(coordinate.y(), style));
         list->append(pair);
     }
 
     return list.release();
 }
 
+PassRefPtrWillBeRawPtr<CSSValue> ComputedStyleCSSValueMapping::get(const AtomicString customPropertyName, const ComputedStyle& style)
+{
+    return CSSCustomPropertyDeclaration::create(customPropertyName, style.variables()->getVariable(customPropertyName));
+}
+
 PassRefPtrWillBeRawPtr<CSSValue> ComputedStyleCSSValueMapping::get(CSSPropertyID propertyID, const ComputedStyle& style, const LayoutObject* layoutObject, Node* styledNode, bool allowVisitedStyle)
 {
     const SVGComputedStyle& svgStyle = style.svgStyle();
     propertyID = CSSProperty::resolveDirectionAwareProperty(propertyID, style.direction(), style.writingMode());
     switch (propertyID) {
     case CSSPropertyInvalid:
         return nullptr;
 
     case CSSPropertyBackgroundColor:
         return allowVisitedStyle ? cssValuePool().createColorValue(style.visitedDependentColor(CSSPropertyBackgroundColor).rgb()) : currentColorOrValidColor(style, style.backgroundColor());
@@ skipping 1323 matching lines @@
         if (style.contain() & ContainsStyle)
             list->append(cssValuePool().createIdentifierValue(CSSValueStyle));
         if (style.contain() & ContainsLayout)
             list->append(cssValuePool().createIdentifierValue(CSSValueLayout));
         if (style.contain() & ContainsPaint)
             list->append(cssValuePool().createIdentifierValue(CSSValuePaint));
         ASSERT(list->length());
         return list.release();
     }
     case CSSPropertyVariable:
-        // TODO(leviw): We should have a way to retrive variables here.
+        // Variables are retrieved via get(AtomicString).
         ASSERT_NOT_REACHED();
         return nullptr;
     case CSSPropertyAll:
         return nullptr;
     default:
         break;
     }
     ASSERT_NOT_REACHED();
     return nullptr;
 }
 
 }