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/*
* Copyright (C) 2009 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 "ScriptState.h"
#include "Frame.h"
#include "Node.h"
#include "Page.h"
#include "ScriptController.h"
#include "V8HiddenPropertyName.h"
#include <v8.h>
#include <wtf/Assertions.h>
namespace WebCore {
ScriptState::ScriptState(v8::Handle<v8::Context> context)
: m_context(v8::Persistent<v8::Context>::New(context))
{
m_context.MakeWeak(this, &ScriptState::weakReferenceCallback);
}
ScriptState::~ScriptState()
{
m_context.Dispose();
m_context.Clear();
}
ScriptState* ScriptState::forContext(v8::Local<v8::Context> context)
{
v8::Context::Scope contextScope(context);
v8::Local<v8::Object> global = context->Global();
// Skip proxy object. The proxy object will survive page navigation while we need
// an object whose lifetime consides with that of the inspected context.
global = v8::Local<v8::Object>::Cast(global->GetPrototype());
v8::Handle<v8::String> key = V8HiddenPropertyName::scriptState();
v8::Local<v8::Value> val = global->GetHiddenValue(key);
if (!val.IsEmpty() && val->IsExternal())
return static_cast<ScriptState*>(v8::External::Cast(*val)->Value());
ScriptState* state = new ScriptState(context);
global->SetHiddenValue(key, v8::External::New(state));
return state;
}
ScriptState* ScriptState::current()
{
v8::HandleScope handleScope;
v8::Local<v8::Context> context = v8::Context::GetCurrent();
if (context.IsEmpty()) {
ASSERT_NOT_REACHED();
return 0;
}
return ScriptState::forContext(context);
}
void ScriptState::weakReferenceCallback(v8::Persistent<v8::Value> object, void* parameter)
{
ScriptState* scriptState = static_cast<ScriptState*>(parameter);
delete scriptState;
}
ScriptState* mainWorldScriptState(Frame* frame)
{
v8::HandleScope handleScope;
V8Proxy* proxy = frame->script()->proxy();
return ScriptState::forContext(proxy->mainWorldContext());
}
ScriptState* scriptStateFromNode(DOMWrapperWorld*, Node* node)
{
// This should be never reached with V8 bindings (WebKit only uses it
// for non-JS bindings)
ASSERT_NOT_REACHED();
return 0;
}
ScriptState* scriptStateFromPage(DOMWrapperWorld*, Page* page)
{
// This should be only reached with V8 bindings from single process layout tests.
return mainWorldScriptState(page->mainFrame());
}
}
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