C++ ExecState::lexicalGlobalObject方法代码示例

JSObjectRef JSContextGetGlobalObject(JSContextRef ctx)
{
    ExecState* exec = toJS(ctx);
    APIEntryShim entryShim(exec);

    // It is necessary to call toThisObject to get the wrapper object when used with WebCore.
    return toRef(exec->lexicalGlobalObject()->methodTable()->toThisObject(exec->lexicalGlobalObject(), exec));
}

JSObjectRef JSObjectMakeConstructor(JSContextRef ctx, JSClassRef jsClass, JSObjectCallAsConstructorCallback callAsConstructor)
{
    ExecState* exec = toJS(ctx);
    APIEntryShim entryShim(exec);

    JSValue jsPrototype = jsClass ? jsClass->prototype(exec) : 0;
    if (!jsPrototype)
        jsPrototype = exec->lexicalGlobalObject()->objectPrototype();

    JSCallbackConstructor* constructor = JSCallbackConstructor::create(exec, exec->lexicalGlobalObject(), exec->lexicalGlobalObject()->callbackConstructorStructure(), jsClass, callAsConstructor);
    constructor->putDirect(exec->globalData(), exec->propertyNames().prototype, jsPrototype, DontEnum | DontDelete | ReadOnly);
    return toRef(constructor);
}

JSObjectRef JSObjectMake(JSContextRef ctx, JSClassRef jsClass, void* data)
{
    JSLock lock;
    ExecState* exec = toJS(ctx);

    if (!jsClass)
        return toRef(new (exec) JSObject(exec->lexicalGlobalObject()->objectPrototype())); // slightly more efficient

    JSValue* jsPrototype = jsClass->prototype(ctx);
    if (!jsPrototype)
        jsPrototype = exec->lexicalGlobalObject()->objectPrototype();

    return toRef(new (exec) JSCallbackObject<JSObject>(exec, jsClass, jsPrototype, data));
}

JSObjectRef JSObjectMake(JSContextRef ctx, JSClassRef jsClass, void* data)
{
    ExecState* exec = toJS(ctx);
    APIEntryShim entryShim(exec);

    if (!jsClass)
        return toRef(new (exec) JSObject(exec->lexicalGlobalObject()->emptyObjectStructure())); // slightly more efficient

    JSCallbackObject<JSObject>* object = new (exec) JSCallbackObject<JSObject>(exec, exec->lexicalGlobalObject()->callbackObjectStructure(), jsClass, data);
    if (JSObject* prototype = jsClass->prototype(exec))
        object->setPrototype(prototype);

    return toRef(object);
}

JSObjectRef JSObjectMakeConstructor(JSContextRef ctx, JSClassRef jsClass, JSObjectCallAsConstructorCallback callAsConstructor)
{
    ExecState* exec = toJS(ctx);
    exec->globalData().heap.registerThread();
    JSLock lock(exec);

    JSValuePtr jsPrototype = jsClass 
        ? jsClass->prototype(exec)
        : exec->lexicalGlobalObject()->objectPrototype();
    
    JSCallbackConstructor* constructor = new (exec) JSCallbackConstructor(exec->lexicalGlobalObject()->callbackConstructorStructure(), jsClass, callAsConstructor);
    constructor->putDirect(exec->propertyNames().prototype, jsPrototype, DontEnum | DontDelete | ReadOnly);
    return toRef(constructor);
}

JSObjectRef JSObjectMake(JSContextRef ctx, JSClassRef jsClass, void* data)
{
    ExecState* exec = toJS(ctx);
    exec->globalData().heap->registerThread();
    JSLock lock(exec);

    if (!jsClass)
        return toRef(new (exec) JSObject(exec->lexicalGlobalObject()->objectPrototype())); // slightly more efficient

    JSObject* jsPrototype = jsClass->prototype(exec);
    if (!jsPrototype)
        jsPrototype = exec->lexicalGlobalObject()->objectPrototype();

    return toRef(new (exec) JSCallbackObject<JSObject>(exec, jsClass, jsPrototype, data));
}

JSObjectRef JSObjectMakeRegExp(JSContextRef ctx, size_t argumentCount, const JSValueRef arguments[],  JSValueRef* exception)
{
    if (!ctx) {
        ASSERT_NOT_REACHED();
        return 0;
    }
    ExecState* exec = toJS(ctx);
    JSLockHolder locker(exec);

    MarkedArgumentBuffer argList;
    for (size_t i = 0; i < argumentCount; ++i)
        argList.append(toJS(exec, arguments[i]));

    JSObject* result = constructRegExp(exec, exec->lexicalGlobalObject(),  argList);
    if (exec->hadException()) {
        JSValue exceptionValue = exec->exception();
        if (exception)
            *exception = toRef(exec, exceptionValue);
        exec->clearException();
#if ENABLE(REMOTE_INSPECTOR)
        exec->vmEntryGlobalObject()->inspectorController().reportAPIException(exec, exceptionValue);
#endif
        result = 0;
    }
    
    return toRef(result);
}

JSObjectRef JSObjectMakeError(JSContextRef ctx, size_t argumentCount, const JSValueRef arguments[],  JSValueRef* exception)
{
    if (!ctx) {
        ASSERT_NOT_REACHED();
        return 0;
    }
    ExecState* exec = toJS(ctx);
    JSLockHolder locker(exec);

    JSValue message = argumentCount ? toJS(exec, arguments[0]) : jsUndefined();
    Structure* errorStructure = exec->lexicalGlobalObject()->errorStructure();
    JSObject* result = ErrorInstance::create(exec, errorStructure, message);

    if (exec->hadException()) {
        JSValue exceptionValue = exec->exception();
        if (exception)
            *exception = toRef(exec, exceptionValue);
        exec->clearException();
#if ENABLE(REMOTE_INSPECTOR)
        exec->vmEntryGlobalObject()->inspectorController().reportAPIException(exec, exceptionValue);
#endif
        result = 0;
    }

    return toRef(result);
}

JSObjectRef JSObjectMakeFunction(JSContextRef ctx, JSStringRef name, unsigned parameterCount, const JSStringRef parameterNames[], JSStringRef body, JSStringRef sourceURL, int startingLineNumber, JSValueRef* exception)
{
    if (!ctx) {
        ASSERT_NOT_REACHED();
        return 0;
    }
    ExecState* exec = toJS(ctx);
    APIEntryShim entryShim(exec);

    Identifier nameID = name ? name->identifier(&exec->vm()) : Identifier(exec, "anonymous");
    
    MarkedArgumentBuffer args;
    for (unsigned i = 0; i < parameterCount; i++)
        args.append(jsString(exec, parameterNames[i]->string()));
    args.append(jsString(exec, body->string()));

    JSObject* result = constructFunction(exec, exec->lexicalGlobalObject(), args, nameID, sourceURL->string(), TextPosition(OrdinalNumber::fromOneBasedInt(startingLineNumber), OrdinalNumber::first()));
    if (exec->hadException()) {
        if (exception)
            *exception = toRef(exec, exec->exception());
        exec->clearException();
        result = 0;
    }
    return toRef(result);
}

EncodedJSValue JSC_HOST_CALL constructJSWorker(ExecState& exec)
{
    VM& vm = exec.vm();
    auto scope = DECLARE_THROW_SCOPE(vm);

    DOMConstructorObject* jsConstructor = jsCast<DOMConstructorObject*>(exec.callee());

    if (!exec.argumentCount())
        return throwVMError(&exec, scope, createNotEnoughArgumentsError(&exec));

    String scriptURL = exec.uncheckedArgument(0).toWTFString(&exec);
    if (exec.hadException())
        return JSValue::encode(JSValue());

    // See section 4.8.2 step 14 of WebWorkers for why this is the lexicalGlobalObject.
    DOMWindow& window = asJSDOMWindow(exec.lexicalGlobalObject())->wrapped();

    ExceptionCode ec = 0;
    ASSERT(window.document());
    RefPtr<Worker> worker = Worker::create(*window.document(), scriptURL, ec);
    if (ec) {
        setDOMException(&exec, ec);
        return JSValue::encode(JSValue());
    }

    return JSValue::encode(toJSNewlyCreated(&exec, jsConstructor->globalObject(), WTFMove(worker)));
}

JSValue JSHTMLDocument::open(ExecState& state)
{
    // For compatibility with other browsers, pass open calls with more than 2 parameters to the window.
    if (state.argumentCount() > 2) {
        if (Frame* frame = wrapped().frame()) {
            JSDOMWindowShell* wrapper = toJSDOMWindowShell(frame, currentWorld(&state));
            if (wrapper) {
                JSValue function = wrapper->get(&state, Identifier::fromString(&state, "open"));
                CallData callData;
                CallType callType = ::getCallData(function, callData);
                if (callType == CallTypeNone)
                    return throwTypeError(&state);
                return JSC::call(&state, function, callType, callData, wrapper, ArgList(&state));
            }
        }
        return jsUndefined();
    }

    // document.open clobbers the security context of the document and
    // aliases it with the active security context.
    Document* activeDocument = asJSDOMWindow(state.lexicalGlobalObject())->wrapped().document();

    // In the case of two parameters or fewer, do a normal document open.
    wrapped().open(activeDocument);
    return this;
}

JSObjectRef JSObjectMakeRegExp(JSContextRef ctx, size_t argumentCount, const JSValueRef arguments[],  JSValueRef* exception)
{
    if (!ctx) {
        ASSERT_NOT_REACHED();
        return 0;
    }
    ExecState* exec = toJS(ctx);
    VM& vm = exec->vm();
    JSLockHolder locker(vm);
    auto scope = DECLARE_CATCH_SCOPE(vm);

    MarkedArgumentBuffer argList;
    for (size_t i = 0; i < argumentCount; ++i)
        argList.append(toJS(exec, arguments[i]));
    if (UNLIKELY(argList.hasOverflowed())) {
        auto throwScope = DECLARE_THROW_SCOPE(vm);
        throwOutOfMemoryError(exec, throwScope);
        handleExceptionIfNeeded(scope, exec, exception);
        return 0;
    }

    JSObject* result = constructRegExp(exec, exec->lexicalGlobalObject(), argList);
    if (handleExceptionIfNeeded(scope, exec, exception) == ExceptionStatus::DidThrow)
        result = 0;
    
    return toRef(result);
}

bool injectIDBKeyIntoScriptValue(DOMRequestState* requestState, PassRefPtr<IDBKey> key, Deprecated::ScriptValue& value, const IDBKeyPath& keyPath)
{
    LOG(StorageAPI, "injectIDBKeyIntoScriptValue");

    ASSERT(keyPath.type() == IndexedDB::KeyPathType::String);

    Vector<String> keyPathElements;
    IDBKeyPathParseError error;
    IDBParseKeyPath(keyPath.string(), keyPathElements, error);
    ASSERT(error == IDBKeyPathParseError::None);

    if (keyPathElements.isEmpty())
        return false;

    ExecState* exec = requestState->exec();

    JSValue parent = ensureNthValueOnKeyPath(exec, value.jsValue(), keyPathElements, keyPathElements.size() - 1);
    if (parent.isUndefined())
        return false;

    if (!set(exec, parent, keyPathElements.last(), idbKeyToJSValue(exec, exec->lexicalGlobalObject(), key.get())))
        return false;

    return true;
}

void injectInternalsObject(JSContextRef context)
{
    JSLock lock(SilenceAssertionsOnly);
    ExecState* exec = toJS(context);
    JSDOMGlobalObject* globalObject = static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject());
    globalObject->putDirect(exec->globalData(), Identifier(exec, "internals"), toJS(exec, globalObject, Internals::create()));
}

JSGlobalContextRef JSContextGetGlobalContext(JSContextRef ctx)
{
    ExecState* exec = toJS(ctx);
    APIEntryShim entryShim(exec);

    return toGlobalRef(exec->lexicalGlobalObject()->globalExec());
}