Source/bindings/v8/V8HiddenPropertyName.cpp

/*
 * Copyright (C) 2009 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 *
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 * notice, this list of conditions and the following disclaimer.
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 * in the documentation and/or other materials provided with the
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "config.h"
#include "bindings/v8/V8HiddenPropertyName.h"

#include "bindings/v8/V8Binding.h"
#include <string.h>
#include "wtf/StdLibExtras.h"
#include "wtf/Vector.h"

namespace WebCore {

#define V8_AS_STRING(x) V8_AS_STRING_IMPL(x)
#define V8_AS_STRING_IMPL(x) #x

#define V8_HIDDEN_PROPERTY_PREFIX "WebCore::HiddenProperty::"

#define V8_DEFINE_HIDDEN_PROPERTY(name) \
v8::Handle<v8::String> V8HiddenPropertyName::name(v8::Isolate* isolate) \
{ \
    V8HiddenPropertyName* hiddenPropertyName = V8PerIsolateData::from(isolate)->hiddenPropertyName(); \
    if (hiddenPropertyName->m_##name.IsEmpty()) { \
        createString(V8_HIDDEN_PROPERTY_PREFIX V8_AS_STRING(name), &(hiddenPropertyName->m_##name), isolate); \
    } \
    return v8::Local<v8::String>::New(isolate, hiddenPropertyName->m_##name); \
}

V8_HIDDEN_PROPERTIES(V8_DEFINE_HIDDEN_PROPERTY);

static v8::Handle<v8::String> hiddenReferenceName(const char* name, unsigned length)
{
    ASSERT(length);
    Vector<char, 64> prefixedName;
    prefixedName.append(V8_HIDDEN_PROPERTY_PREFIX, sizeof(V8_HIDDEN_PROPERTY_PREFIX) - 1);
    prefixedName.append(name, length);
    return v8::String::NewSymbol(prefixedName.data(), static_cast<int>(prefixedName.size()));
}

void V8HiddenPropertyName::setNamedHiddenReference(v8::Handle<v8::Object> parent, const char* name, v8::Handle<v8::Value> child)
{
    ASSERT(name);
    parent->SetHiddenValue(hiddenReferenceName(name, strlen(name)), child);
}

void V8HiddenPropertyName::createString(const char* key, v8::Persistent<v8::String>* handle, v8::Isolate* isolate)
{
    v8::HandleScope scope(isolate);
    handle->Reset(isolate, v8::String::NewSymbol(key));
}

}  // namespace WebCore