root/Source/bindings/v8/ScriptState.cpp

DEFINITIONS

1. m_isolate
2. domWindow
3. executionContext
4. forContext
5. current
6. setWeakCallback
7. evalEnabled
8. setEvalEnabled
9. mainWorldScriptState
10. scriptStateFromWorkerGlobalScope

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#include "config.h"
#include "bindings/v8/ScriptState.h"

#include "V8Window.h"
#include "V8WorkerGlobalScope.h"
#include "bindings/v8/ScriptController.h"
#include "bindings/v8/V8HiddenValue.h"
#include "bindings/v8/WorkerScriptController.h"
#include "core/frame/LocalFrame.h"
#include "core/workers/WorkerGlobalScope.h"
#include <v8.h>
#include "wtf/Assertions.h"

namespace WebCore {

ScriptState::ScriptState(v8::Handle<v8::Context> context)
    : m_context(context->GetIsolate(), context)
    , m_isolate(context->GetIsolate())
{
    m_context.setWeak(this, &setWeakCallback);
}

ScriptState::~ScriptState()
{
}

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

ExecutionContext* ScriptState::executionContext() const
{
    v8::HandleScope handleScope(m_isolate);
    return toExecutionContext(m_context.newLocal(m_isolate));
}

ScriptState* ScriptState::forContext(v8::Handle<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 = V8HiddenValue::getHiddenValue(context->GetIsolate(), innerGlobal, V8HiddenValue::scriptState(context->GetIsolate()));
    if (!scriptStateWrapper.IsEmpty() && scriptStateWrapper->IsExternal())
        return static_cast<ScriptState*>(v8::External::Cast(*scriptStateWrapper)->Value());

    ScriptState* scriptState = new ScriptState(context);
    V8HiddenValue::setHiddenValue(context->GetIsolate(), innerGlobal, V8HiddenValue::scriptState(context->GetIsolate()), v8::External::New(context->GetIsolate(), scriptState));
    return scriptState;
}

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

void ScriptState::setWeakCallback(const v8::WeakCallbackData<v8::Context, ScriptState>& data)
{
    delete data.GetParameter();
}

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

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

ScriptState* mainWorldScriptState(LocalFrame* frame)
{
    v8::Isolate* isolate = toIsolate(frame);
    v8::HandleScope handleScope(isolate);
    return ScriptState::forContext(toV8Context(isolate, frame, DOMWrapperWorld::mainWorld()));
}

ScriptState* scriptStateFromWorkerGlobalScope(WorkerGlobalScope* workerGlobalScope)
{
    WorkerScriptController* script = workerGlobalScope->script();
    if (!script)
        return 0;

    v8::HandleScope handleScope(script->isolate());
    return ScriptState::forContext(script->context());
}

}