Source/WebCore/bindings/js/JSDOMWindowShell.cpp

/*
 * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
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 * are met:
 *
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 *     notice, this list of conditions and the following disclaimer in the
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 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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#include "config.h"
#include "JSDOMWindowShell.h"

#include "Frame.h"
#include "JSDOMWindow.h"
#include "DOMWindow.h"
#include "ScriptController.h"
#include <heap/StrongInlines.h>
#include <runtime/JSObject.h>

using namespace JSC;

namespace WebCore {

ASSERT_CLASS_FITS_IN_CELL(JSDOMWindowShell);

const ClassInfo JSDOMWindowShell::s_info = { "JSDOMWindowShell", &Base::s_info, 0, 0, CREATE_METHOD_TABLE(JSDOMWindowShell) };

JSDOMWindowShell::JSDOMWindowShell(Structure* structure, DOMWrapperWorld* world)
    : Base(*world->globalData(), structure)
    , m_world(world)
{
}

void JSDOMWindowShell::finishCreation(JSGlobalData& globalData, PassRefPtr<DOMWindow> window)
{
    Base::finishCreation(globalData);
    ASSERT(inherits(&s_info));
    setWindow(window);
}

JSDOMWindowShell::~JSDOMWindowShell()
{
}

void JSDOMWindowShell::setWindow(PassRefPtr<DOMWindow> domWindow)
{
    // Replacing JSDOMWindow via telling JSDOMWindowShell to use the same DOMWindow it already uses makes no sense,
    // so we'd better never try to.
    ASSERT(!m_window || domWindow.get() != m_window->impl());
    // Explicitly protect the global object's prototype so it isn't collected
    // when we allocate the global object. (Once the global object is fully
    // constructed, it can mark its own prototype.)
    Structure* prototypeStructure = JSDOMWindowPrototype::createStructure(*JSDOMWindow::commonJSGlobalData(), 0, jsNull());
    Strong<JSDOMWindowPrototype> prototype(*JSDOMWindow::commonJSGlobalData(), JSDOMWindowPrototype::create(*JSDOMWindow::commonJSGlobalData(), 0, prototypeStructure));

    Structure* structure = JSDOMWindow::createStructure(*JSDOMWindow::commonJSGlobalData(), 0, prototype.get());
    JSDOMWindow* jsDOMWindow = JSDOMWindow::create(*JSDOMWindow::commonJSGlobalData(), structure, domWindow, this);
    prototype->structure()->setGlobalObject(*JSDOMWindow::commonJSGlobalData(), jsDOMWindow);
    setWindow(*JSDOMWindow::commonJSGlobalData(), jsDOMWindow);
    ASSERT(jsDOMWindow->globalObject() == jsDOMWindow);
    ASSERT(prototype->globalObject() == jsDOMWindow);
}

// ----
// JSObject methods
// ----

void JSDOMWindowShell::visitChildren(JSCell* cell, SlotVisitor& visitor)
{
    JSDOMWindowShell* thisObject = static_cast<JSDOMWindowShell*>(cell);
    ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);
    COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);
    ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren());
    Base::visitChildren(thisObject, visitor);
    if (thisObject->m_window)
        visitor.append(&thisObject->m_window);
}

UString JSDOMWindowShell::className() const
{
    return m_window->className();
}

bool JSDOMWindowShell::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
{
    return m_window->getOwnPropertySlot(exec, propertyName, slot);
}

bool JSDOMWindowShell::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
{
    return m_window->getOwnPropertyDescriptor(exec, propertyName, descriptor);
}

void JSDOMWindowShell::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
{
    m_window->put(exec, propertyName, value, slot);
}

void JSDOMWindowShell::putWithAttributes(ExecState* exec, const Identifier& propertyName, JSValue value, unsigned attributes)
{
    m_window->putWithAttributes(exec, propertyName, value, attributes);
}

bool JSDOMWindowShell::defineOwnProperty(JSC::ExecState* exec, const JSC::Identifier& propertyName, JSC::PropertyDescriptor& descriptor, bool shouldThrow)
{
    return m_window->defineOwnProperty(exec, propertyName, descriptor, shouldThrow);
}

bool JSDOMWindowShell::deleteProperty(ExecState* exec, const Identifier& propertyName)
{
    return m_window->deleteProperty(exec, propertyName);
}

void JSDOMWindowShell::getPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
{
    m_window->getPropertyNames(exec, propertyNames, mode);
}

void JSDOMWindowShell::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
{
    m_window->getOwnPropertyNames(exec, propertyNames, mode);
}

void JSDOMWindowShell::defineGetter(ExecState* exec, const Identifier& propertyName, JSObject* getterFunction, unsigned attributes)
{
    m_window->defineGetter(exec, propertyName, getterFunction, attributes);
}

void JSDOMWindowShell::defineSetter(ExecState* exec, const Identifier& propertyName, JSObject* setterFunction, unsigned attributes)
{
    m_window->defineSetter(exec, propertyName, setterFunction, attributes);
}

JSValue JSDOMWindowShell::lookupGetter(ExecState* exec, const Identifier& propertyName)
{
    return m_window->lookupGetter(exec, propertyName);
}

JSValue JSDOMWindowShell::lookupSetter(ExecState* exec, const Identifier& propertyName)
{
    return m_window->lookupSetter(exec, propertyName);
}

JSObject* JSDOMWindowShell::unwrappedObject()
{
    return m_window.get();
}

// ----
// JSDOMWindow methods
// ----

DOMWindow* JSDOMWindowShell::impl() const
{
    return m_window->impl();
}

void* JSDOMWindowShell::operator new(size_t size)
{
    Heap& heap = JSDOMWindow::commonJSGlobalData()->heap;
#if ENABLE(GC_VALIDATION)
    ASSERT(!heap.globalData()->isInitializingObject());
    heap.globalData()->setInitializingObject(true);
#endif
    return heap.allocate(size);
}

// ----
// Conversion methods
// ----

JSValue toJS(ExecState* exec, Frame* frame)
{
    if (!frame)
        return jsNull();
    return frame->script()->windowShell(currentWorld(exec));
}

JSDOMWindowShell* toJSDOMWindowShell(Frame* frame, DOMWrapperWorld* isolatedWorld)
{
    if (!frame)
        return 0;
    return frame->script()->windowShell(isolatedWorld);
}

} // namespace WebCore