third_party/WebKit/Source/bindings/core/v8/ScriptValue.cpp

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#include "bindings/core/v8/ScriptValue.h"

#include "bindings/core/v8/ScriptState.h"
#include "bindings/core/v8/SerializedScriptValueFactory.h"
#include "bindings/core/v8/V8Binding.h"

namespace blink {

v8::Local<v8::Value> ScriptValue::v8Value() const {
  if (isEmpty())
    return v8::Local<v8::Value>();

  ASSERT(isolate()->InContext());

  // This is a check to validate that you don't return a ScriptValue to a world different
  // from the world that created the ScriptValue.
  // Probably this could be:
  //   if (&m_scriptState->world() == &DOMWrapperWorld::current(isolate()))
  //       return v8::Local<v8::Value>();
  // instead of triggering RELEASE_ASSERT.
  RELEASE_ASSERT(&m_scriptState->world() ==
                 &DOMWrapperWorld::current(isolate()));
  return m_value->newLocal(isolate());
}

v8::Local<v8::Value> ScriptValue::v8ValueFor(
    ScriptState* targetScriptState) const {
  if (isEmpty())
    return v8::Local<v8::Value>();
  v8::Isolate* isolate = targetScriptState->isolate();
  if (&m_scriptState->world() == &targetScriptState->world())
    return m_value->newLocal(isolate);

  ASSERT(isolate->InContext());
  v8::Local<v8::Value> value = m_value->newLocal(isolate);
  RefPtr<SerializedScriptValue> serialized =
      SerializedScriptValue::serializeAndSwallowExceptions(isolate, value);
  return serialized->deserialize();
}

bool ScriptValue::toString(String& result) const {
  if (isEmpty())
    return false;

  ScriptState::Scope scope(m_scriptState.get());
  v8::Local<v8::Value> string = v8Value();
  if (string.IsEmpty() || !string->IsString())
    return false;
  result = toCoreString(v8::Local<v8::String>::Cast(string));
  return true;
}

ScriptValue ScriptValue::createNull(ScriptState* scriptState) {
  return ScriptValue(scriptState, v8::Null(scriptState->isolate()));
}

}  // namespace blink