Source/WebCore/bindings/v8/ScriptState.cpp

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#include "config.h"
#include "ScriptState.h"

#include "Frame.h"
#include "Node.h"
#include "Page.h"
#include "ScriptController.h"
#include "V8DOMWindow.h"
#include "V8HiddenPropertyName.h"
#include "V8WorkerContext.h"
#include "WorkerContext.h"
#include "WorkerContextExecutionProxy.h"
#include "WorkerScriptController.h"
#include <v8.h>
#include <wtf/Assertions.h>

namespace WebCore {

ScriptState::ScriptState(v8::Handle<v8::Context> context)
    : m_context(context)
{
    m_context.get().MakeWeak(this, &ScriptState::weakReferenceCallback);
}

ScriptState::~ScriptState()
{
}

DOMWindow* ScriptState::domWindow() const
{
    v8::HandleScope handleScope;
    return toDOMWindow(m_context.get());
}

ScriptExecutionContext* ScriptState::scriptExecutionContext() const
{
    v8::HandleScope handleScope;
    return toScriptExecutionContext(m_context.get());
}

ScriptState* ScriptState::forContext(v8::Local<v8::Context> context)
{
    v8::Context::Scope contextScope(context);

    v8::Local<v8::Object> innerGlobal = v8::Local<v8::Object>::Cast(context->Global()->GetPrototype());

    v8::Local<v8::Value> scriptStateWrapper = innerGlobal->GetHiddenValue(V8HiddenPropertyName::scriptState());
    if (!scriptStateWrapper.IsEmpty() && scriptStateWrapper->IsExternal())
        return static_cast<ScriptState*>(v8::External::Cast(*scriptStateWrapper)->Value());

    ScriptState* scriptState = new ScriptState(context);
    innerGlobal->SetHiddenValue(V8HiddenPropertyName::scriptState(), v8::External::New(scriptState));
    return scriptState;
}

ScriptState* ScriptState::current()
{
    v8::HandleScope handleScope;
    v8::Local<v8::Context> context = v8::Context::GetCurrent();
    ASSERT(!context.IsEmpty());
    return ScriptState::forContext(context);
}

void ScriptState::weakReferenceCallback(v8::Persistent<v8::Value> object, void* parameter)
{
    ScriptState* scriptState = static_cast<ScriptState*>(parameter);
    delete scriptState;
}

DOMWindow* domWindowFromScriptState(ScriptState* scriptState)
{
    return scriptState->domWindow();
}

ScriptExecutionContext* scriptExecutionContextFromScriptState(ScriptState* scriptState)
{
    return scriptState->scriptExecutionContext();
}

bool evalEnabled(ScriptState* scriptState)
{
    v8::HandleScope handleScope;
    return scriptState->context()->IsCodeGenerationFromStringsAllowed();
}

void setEvalEnabled(ScriptState* scriptState, bool enabled)
{
    v8::HandleScope handleScope;
    return scriptState->context()->AllowCodeGenerationFromStrings(enabled);
}

ScriptState* mainWorldScriptState(Frame* frame)
{
    v8::HandleScope handleScope;
    return ScriptState::forContext(frame->script()->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());
}

#if ENABLE(WORKERS)
ScriptState* scriptStateFromWorkerContext(WorkerContext* workerContext)
{
    WorkerContextExecutionProxy* proxy = workerContext->script()->proxy();
    if (!proxy)
        return 0;

    v8::HandleScope handleScope;
    v8::Local<v8::Context> context = proxy->context();
    return ScriptState::forContext(context);
}
#endif

}