[Experimental] CSSSerializer Proof-of-concept

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

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2005, 2006, 2008, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 15 matching lines @@
 #include "core/css/CSSKeyframesRule.h"
 #include "core/css/CSSMediaRule.h"
 #include "core/css/CSSNamespaceRule.h"
 #include "core/css/CSSPageRule.h"
 #include "core/css/CSSStyleRule.h"
 #include "core/css/CSSSupportsRule.h"
 #include "core/css/CSSViewportRule.h"
 #include "core/css/StyleRuleImport.h"
 #include "core/css/StyleRuleKeyframe.h"
 #include "core/css/StyleRuleNamespace.h"
+#include "core/css/serializer/CSSDeserializeStream.h"
+#include "core/css/serializer/CSSSerializeStream.h"
 
 namespace blink {
 
 struct SameSizeAsStyleRuleBase : public RefCountedWillBeGarbageCollectedFinalized<SameSizeAsStyleRuleBase> {
     unsigned bitfields;
 };
 
 static_assert(sizeof(StyleRuleBase) <= sizeof(SameSizeAsStyleRuleBase), "StyleRuleBase should stay small");
 
 PassRefPtrWillBeRawPtr<CSSRule> StyleRuleBase::createCSSOMWrapper(CSSStyleSheet* parentSheet) const
 {
     return createCSSOMWrapper(parentSheet, 0);
 }
 
 PassRefPtrWillBeRawPtr<CSSRule> StyleRuleBase::createCSSOMWrapper(CSSRule* parentRule) const
 {
     return createCSSOMWrapper(0, parentRule);
 }
 
+PassRefPtrWillBeRawPtr<StyleRuleBase> StyleRuleBase::deserialize(CSSDeserializeStream* stream)
+{
+    Type type = static_cast<Type>(stream->readUnsigned());
+
+    switch (type) {
+    case Style:
+        return StyleRule::deserializeAfterDispatch(stream);
+    case Media:
+        return StyleRuleMedia::deserializeAfterDispatch(stream);
+    case Keyframes:
+        return StyleRuleKeyframes::deserializeAfterDispatch(stream);
+    case Keyframe:
+        return StyleRuleKeyframe::deserializeAfterDispatch(stream);
+    case FontFace:
+        return StyleRuleFontFace::deserializeAfterDispatch(stream);
+
+    default:
+        ASSERT_NOT_REACHED();
+        return nullptr;
+    }
+}
+
+void StyleRuleBase::serialize(CSSSerializeStream* stream) const
+{
+    stream->writeUnsigned(type());
+    switch (type()) {
+    /*
+    case Charset:
+        toStyleRuleCharset(this)->serializeAfterDispatch(stream);
+        return;
+        */
+    case Style:
+        toStyleRule(this)->serializeAfterDispatch(stream);
+        return;
+    /*
+    case Page:
+        toStyleRulePage(this)->serializeAfterDispatch(stream);
+        return;
+    */
+    case FontFace:
+        toStyleRuleFontFace(this)->serializeAfterDispatch(stream);
+        return;
+    case Media:
+        toStyleRuleMedia(this)->serializeAfterDispatch(stream);
+        return;
+    /*
+    case Supports:
+        toStyleRuleSupports(this)->serializeAfterDispatch(stream);
+        return;
+    case Import:
+        toStyleRuleImport(this)->serializeAfterDispatch(stream);
+        return;
+    */
+    case Keyframes:
+        toStyleRuleKeyframes(this)->serializeAfterDispatch(stream);
+        return;
+    case Keyframe:
+        toStyleRuleKeyframe(this)->serializeAfterDispatch(stream);
+        return;
+    /*
+    case Namespace:
+        toStyleRuleNamespace(this)->serializeAfterDispatch(stream);
+        return;
+    case Viewport:
+        toStyleRuleViewport(this)->serializeAfterDispatch(stream);
+        return;
+        */
+    default:
+        break;
+    }
+    ASSERT_NOT_REACHED();
+}
+
 DEFINE_TRACE(StyleRuleBase)
 {
     switch (type()) {
     case Charset:
         toStyleRuleCharset(this)->traceAfterDispatch(visitor);
         return;
     case Style:
         toStyleRule(this)->traceAfterDispatch(visitor);
         return;
     case Page:
@@ skipping 203 matching lines @@
 {
 }
 
 MutableStylePropertySet& StyleRule::mutableProperties()
 {
     if (!m_properties->isMutable())
         m_properties = m_properties->mutableCopy();
     return *toMutableStylePropertySet(m_properties.get());
 }
 
+PassRefPtrWillBeRawPtr<StyleRule> StyleRule::deserializeAfterDispatch(CSSDeserializeStream* stream)
+{
+    RefPtrWillBeMember<StylePropertySet> properties = ImmutableStylePropertySet::deserialize(stream);
+    CSSSelectorList selectorList = CSSSelectorList::deserialize(stream);
+    return StyleRule::create(std::move(selectorList), properties);
+}
+
+void StyleRule::serializeAfterDispatch(CSSSerializeStream* stream) const
+{
+    CSDEBUG("StyleRule::serializeAfterDispatch()\n");
+    m_properties->serialize(stream);
+    m_selectorList.serialize(stream);
+}
+
 DEFINE_TRACE_AFTER_DISPATCH(StyleRule)
 {
     visitor->trace(m_properties);
     StyleRuleBase::traceAfterDispatch(visitor);
 }
 
 StyleRulePage::StyleRulePage(CSSSelectorList selectorList, PassRefPtrWillBeRawPtr<StylePropertySet> properties)
     : StyleRuleBase(Page)
     , m_properties(properties)
     , m_selectorList(std::move(selectorList))
@@ skipping 40 matching lines @@
 {
 }
 
 MutableStylePropertySet& StyleRuleFontFace::mutableProperties()
 {
     if (!m_properties->isMutable())
         m_properties = m_properties->mutableCopy();
     return *toMutableStylePropertySet(m_properties);
 }
 
+void StyleRuleFontFace::serializeAfterDispatch(CSSSerializeStream* stream) const
+{
+    CSDEBUG("StyleRuleFontFace::serializeAfterDispatch()\n");
+    m_properties->serialize(stream);
+}
+
+PassRefPtrWillBeRawPtr<StyleRuleFontFace> StyleRuleFontFace::deserializeAfterDispatch(CSSDeserializeStream* stream)
+{
+    CSDEBUG("StyleRuleFontFace::deserializeAfterDispatch()\n");
+    RefPtrWillBeRawPtr<StylePropertySet> properties = ImmutableStylePropertySet::deserialize(stream);
+    return create(properties.release());
+}
+
 DEFINE_TRACE_AFTER_DISPATCH(StyleRuleFontFace)
 {
     visitor->trace(m_properties);
     StyleRuleBase::traceAfterDispatch(visitor);
 }
 
 StyleRuleGroup::StyleRuleGroup(Type type, WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& adoptRule)
     : StyleRuleBase(type)
 {
     m_childRules.swap(adoptRule);
 }
 
 StyleRuleGroup::StyleRuleGroup(const StyleRuleGroup& o)
     : StyleRuleBase(o)
     , m_childRules(o.m_childRules.size())
 {
     for (unsigned i = 0; i < m_childRules.size(); ++i)
         m_childRules[i] = o.m_childRules[i]->copy();
 }
 
+void StyleRuleGroup::serializeAfterDispatch(CSSSerializeStream* stream) const
+{
+    CSDEBUG("StyleRuleGroup::serializeAfterDispatch()\n");
+    stream->writeUnsigned(m_childRules.size());
+    for (const RefPtrWillBeMember<StyleRuleBase>& childRule : m_childRules)
+        childRule->serialize(stream);
+}
+
+void StyleRuleGroup::deserializeAfterDispatch(CSSDeserializeStream* stream)
+{
+    CSDEBUG("StyleRuleGroup::deserializeAfterDispatch()\n");
+    ASSERT(m_childRules.isEmpty());
+    unsigned size = stream->readUnsigned();
+    m_childRules.reserveCapacity(size);
+    for (unsigned i = 0; i < size; ++ i)
+        m_childRules.append(StyleRule::deserialize(stream));
+}
+
 void StyleRuleGroup::wrapperInsertRule(unsigned index, PassRefPtrWillBeRawPtr<StyleRuleBase> rule)
 {
     m_childRules.insert(index, rule);
 }
 
 void StyleRuleGroup::wrapperRemoveRule(unsigned index)
 {
     m_childRules.remove(index);
 }
 
 DEFINE_TRACE_AFTER_DISPATCH(StyleRuleGroup)
 {
     visitor->trace(m_childRules);
     StyleRuleBase::traceAfterDispatch(visitor);
 }
 
 StyleRuleMedia::StyleRuleMedia(PassRefPtrWillBeRawPtr<MediaQuerySet> media, WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& adoptRules)
     : StyleRuleGroup(Media, adoptRules)
     , m_mediaQueries(media)
 {
 }
 
 StyleRuleMedia::StyleRuleMedia(const StyleRuleMedia& o)
     : StyleRuleGroup(o)
 {
     if (o.m_mediaQueries)
         m_mediaQueries = o.m_mediaQueries->copy();
 }
 
+void StyleRuleMedia::serializeAfterDispatch(CSSSerializeStream* stream) const
+{
+    CSDEBUG("StyleRuleMedia::serializeAfterDispatch()\n");
+    StyleRuleGroup::serializeAfterDispatch(stream);
+    m_mediaQueries->serialize(stream);
+}
+
+PassRefPtrWillBeRawPtr<StyleRuleMedia> StyleRuleMedia::deserializeAfterDispatch(CSSDeserializeStream* stream)
+{
+    RefPtrWillBeRawPtr<StyleRuleMedia> rule = adoptRefWillBeNoop(new StyleRuleMedia());
+    rule->StyleRuleGroup::deserializeAfterDispatch(stream);
+    rule->m_mediaQueries = MediaQuerySet::deserialize(stream);
+    return rule.release();
+}
+
 DEFINE_TRACE_AFTER_DISPATCH(StyleRuleMedia)
 {
     visitor->trace(m_mediaQueries);
     StyleRuleGroup::traceAfterDispatch(visitor);
 }
 
 StyleRuleSupports::StyleRuleSupports(const String& conditionText, bool conditionIsSupported, WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& adoptRules)
     : StyleRuleGroup(Supports, adoptRules)
     , m_conditionText(conditionText)
     , m_conditionIsSupported(conditionIsSupported)
@@ skipping 30 matching lines @@
     return *toMutableStylePropertySet(m_properties);
 }
 
 DEFINE_TRACE_AFTER_DISPATCH(StyleRuleViewport)
 {
     visitor->trace(m_properties);
     StyleRuleBase::traceAfterDispatch(visitor);
 }
 
 } // namespace blink