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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "V8PopStateEvent.h"
#include "V8History.h"
#include "bindings/v8/SerializedScriptValue.h"
#include "bindings/v8/V8HiddenPropertyName.h"
#include "core/events/PopStateEvent.h"
#include "core/frame/History.h"
namespace WebCore {
// Save the state value to a hidden attribute in the V8PopStateEvent, and return it, for convenience.
static v8::Handle<v8::Value> cacheState(v8::Handle<v8::Object> popStateEvent, v8::Handle<v8::Value> state, v8::Isolate* isolate)
{
popStateEvent->SetHiddenValue(V8HiddenPropertyName::state(isolate), state);
return state;
}
void V8PopStateEvent::stateAttributeGetterCustom(const v8::PropertyCallbackInfo<v8::Value>& info)
{
v8::Handle<v8::Value> result = info.Holder()->GetHiddenValue(V8HiddenPropertyName::state(info.GetIsolate()));
if (!result.IsEmpty()) {
v8SetReturnValue(info, result);
return;
}
PopStateEvent* event = V8PopStateEvent::toNative(info.Holder());
History* history = event->history();
if (!history || !event->serializedState()) {
if (!event->serializedState()) {
// If we're in an isolated world and the event was created in the main world,
// we need to find the 'state' property on the main world wrapper and clone it.
v8::Local<v8::Value> mainWorldState = getHiddenValueFromMainWorldWrapper(info.GetIsolate(), event, V8HiddenPropertyName::state(info.GetIsolate()));
if (!mainWorldState.IsEmpty())
event->setSerializedState(SerializedScriptValue::createAndSwallowExceptions(mainWorldState, info.GetIsolate()));
}
if (event->serializedState())
result = event->serializedState()->deserialize();
else
result = v8::Null(info.GetIsolate());
v8SetReturnValue(info, cacheState(info.Holder(), result, info.GetIsolate()));
return;
}
// There's no cached value from a previous invocation, nor a state value was provided by the
// event, but there is a history object, so first we need to see if the state object has been
// deserialized through the history object already.
// The current history state object might've changed in the meantime, so we need to take care
// of using the correct one, and always share the same deserialization with history.state.
bool isSameState = history->isSameAsCurrentState(event->serializedState());
if (isSameState) {
v8::Handle<v8::Object> v8History = toV8(history, info.Holder(), info.GetIsolate()).As<v8::Object>();
if (!history->stateChanged()) {
result = v8History->GetHiddenValue(V8HiddenPropertyName::state(info.GetIsolate()));
if (!result.IsEmpty()) {
v8SetReturnValue(info, cacheState(info.Holder(), result, info.GetIsolate()));
return;
}
}
result = event->serializedState()->deserialize(info.GetIsolate());
v8History->SetHiddenValue(V8HiddenPropertyName::state(info.GetIsolate()), result);
} else {
result = event->serializedState()->deserialize(info.GetIsolate());
}
v8SetReturnValue(info, cacheState(info.Holder(), result, info.GetIsolate()));
}
} // namespace WebCore
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