Basic implementation of @apply

third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 66 matching lines @@
 #include "core/dom/Text.h"
 #include "core/dom/shadow/ElementShadow.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
 #include "core/html/HTMLIFrameElement.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/layout/GeneratedChildren.h"
 #include "core/layout/LayoutView.h"
+#include "core/style/StyleVariableData.h"
 #include "core/svg/SVGDocumentExtensions.h"
 #include "core/svg/SVGElement.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "wtf/StdLibExtras.h"
 
 namespace {
 
 using namespace blink;
 
 void setAnimationUpdateIfNeeded(StyleResolverState& state, Element& element)
@@ skipping 1165 matching lines @@
         // When hitting matched properties' cache, only inherited properties will be
         // applied.
         if (inheritedOnly && !CSSPropertyMetadata::isInheritedProperty(propertyId))
             continue;
 
         StyleBuilder::applyProperty(propertyId, state, allValue);
     }
 }
 
 template <CSSPropertyPriority priority>
+void StyleResolver::applyPropertiesForApplyAtRule(StyleResolverState& state, const CSSValue* value, bool isImportant, bool inheritedOnly, PropertyWhitelistType propertyWhitelistType)
+{
+    if (priority == ResolveVariables)
+        return;
+    if (!state.style()->variables())
+        return;
+    AtomicString name(toCSSCustomIdentValue(value)->value());
+    CSSVariableData* variableData = state.style()->variables()->getVariable(name);
+    if (!variableData)
+        return;
+    const StylePropertySet* propertySet = variableData->propertySet();
+    if (propertySet)
+        applyProperties<priority>(state, propertySet, isImportant, inheritedOnly, propertyWhitelistType);
+}
+
+template <CSSPropertyPriority priority>
 void StyleResolver::applyProperties(StyleResolverState& state, const StylePropertySet* properties, bool isImportant, bool inheritedOnly, PropertyWhitelistType propertyWhitelistType)
 {
     unsigned propertyCount = properties->propertyCount();
     for (unsigned i = 0; i < propertyCount; ++i) {
         StylePropertySet::PropertyReference current = properties->propertyAt(i);
+        CSSPropertyID property = current.id();
+
+        if (property == CSSPropertyApplyAtRule) {
+            applyPropertiesForApplyAtRule<priority>(state, current.value(), isImportant, inheritedOnly, propertyWhitelistType);
+            continue;
+        }
+
         if (isImportant != current.isImportant())
             continue;
 
-        CSSPropertyID property = current.id();
         if (property == CSSPropertyAll) {
             applyAllProperty<priority>(state, current.value(), inheritedOnly, propertyWhitelistType);
             continue;
         }
 
         if (!isPropertyInWhitelist(propertyWhitelistType, property, document()))
             continue;
 
         if (inheritedOnly && !current.isInherited()) {
             // If the property value is explicitly inherited, we need to apply further non-inherited properties
@@ skipping 267 matching lines @@
     visitor->trace(m_uncommonAttributeRuleSet);
     visitor->trace(m_watchedSelectorsRules);
     visitor->trace(m_treeBoundaryCrossingScopes);
     visitor->trace(m_styleSharingLists);
     visitor->trace(m_pendingStyleSheets);
     visitor->trace(m_document);
 #endif
 }
 
 } // namespace blink