[Experimental] CSSSerializer Proof-of-concept

third_party/WebKit/Source/core/css/serializer/CSSDeserializeStream.h

+// 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.
+
+#ifndef CSSDeserializeStream_h
+#define CSSDeserializeStream_h
+
+#include "core/css/CSSValue.h"
+#include "core/dom/QualifiedName.h"
+#include "platform/graphics/Color.h"
+#include "wtf/Vector.h"
+#include "wtf/PassRefPtr.h"
+
+namespace blink {
+
+struct StylePropertyMetadata;
+struct Referrer;
+
+template<typename T> class CSSDeserializeTrait;
+
+class CSSDeserializeStream {
+    WTF_MAKE_NONCOPYABLE(CSSDeserializeStream);
+
+public:
+    CSSDeserializeStream(const char*, size_t);
+    CSSValue::ClassType readClassType();
+    Color readColor();
+    bool readBool();
+    int readInt();
+    unsigned readUnsigned();
+    double readDouble();
+    UChar32 readUChar32();
+    String readString();
+    AtomicString readAtomicString();
+    QualifiedName readQualifiedName();
+    StylePropertyMetadata readStylePropertyMetadata();
+    Referrer readReferrer();
+
+    template<typename T> T readIntAsEnum()
+    {
+        return static_cast<T>(readInt()); 
+    }
+
+    template<typename T> PassRefPtr<T> readNullableRef();
+
+private:
+    size_t unconsumedSize() const;
+    void padIfNeeded();
+
+    const char* m_ptr;
+    const char* m_ptrEnd;
+};
+
+template<typename T> class CSSDeserializeTrait {
+public:
+    static bool deserializeNonNullHeader(CSSDeserializeStream* stream)
+    {
+        return stream->readBool();
+    }
+};
+
+template<typename T>
+inline PassRefPtr<T> CSSDeserializeStream::readNullableRef()
+{
+    if (!CSSDeserializeTrait<T>::deserializeNonNullHeader(this)) {
+        return nullptr;
+    }
+
+    return T::deserialize(this);
+}
+
+} // namespace blink
+
+#endif // CSSDeserializeStream_h