C++ JSDOMWindow::wrapped方法代码示例

static EncodedJSValue jsDOMWindowWebKit(ExecState* exec, EncodedJSValue thisValue, PropertyName)
{
    JSDOMWindow* castedThis = toJSDOMWindow(JSValue::decode(thisValue));
    if (!BindingSecurity::shouldAllowAccessToDOMWindow(exec, castedThis->wrapped()))
        return JSValue::encode(jsUndefined());
    return JSValue::encode(toJS(exec, castedThis->globalObject(), castedThis->wrapped().webkitNamespace()));
}

void JSDOMWindow::getPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
{
    JSDOMWindow* thisObject = jsCast<JSDOMWindow*>(object);
    // Only allow the window to enumerated by frames in the same origin.
    if (!BindingSecurity::shouldAllowAccessToDOMWindow(exec, thisObject->wrapped()))
        return;
    Base::getPropertyNames(thisObject, exec, propertyNames, mode);
}

JSValue JSDOMWindow::getPrototype(JSObject* object, ExecState* exec)
{
    JSDOMWindow* thisObject = jsCast<JSDOMWindow*>(object);
    if (!BindingSecurity::shouldAllowAccessToDOMWindow(exec, thisObject->wrapped(), DoNotReportSecurityError))
        return jsNull();

    return Base::getPrototype(object, exec);
}

uint32_t JSDOMWindow::getEnumerableLength(ExecState* exec, JSObject* object)
{
    JSDOMWindow* thisObject = jsCast<JSDOMWindow*>(object);
    // Only allow the window to enumerated by frames in the same origin.
    if (!BindingSecurity::shouldAllowAccessToDOMWindow(exec, thisObject->wrapped()))
        return 0;
    return Base::getEnumerableLength(exec, thisObject);
}

bool JSDOMWindow::deletePropertyByIndex(JSCell* cell, ExecState* exec, unsigned propertyName)
{
    JSDOMWindow* thisObject = jsCast<JSDOMWindow*>(cell);
    // Only allow deleting properties by frames in the same origin.
    if (!BindingSecurity::shouldAllowAccessToDOMWindow(exec, thisObject->wrapped(), ThrowSecurityError))
        return false;
    return Base::deletePropertyByIndex(thisObject, exec, propertyName);
}

bool InspectorController::canAccessInspectedScriptState(JSC::ExecState* scriptState) const
{
    JSLockHolder lock(scriptState);
    JSDOMWindow* inspectedWindow = toJSDOMWindow(scriptState->lexicalGlobalObject());
    if (!inspectedWindow)
        return false;

    return BindingSecurity::shouldAllowAccessToDOMWindow(scriptState, inspectedWindow->wrapped(), DoNotReportSecurityError);
}

void JSDOMWindow::getOwnPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
{
    JSDOMWindow* thisObject = jsCast<JSDOMWindow*>(object);
    if (!BindingSecurity::shouldAllowAccessToDOMWindow(exec, thisObject->wrapped(), DoNotReportSecurityError)) {
        if (mode.includeDontEnumProperties())
            addCrossOriginWindowPropertyNames(*exec, propertyNames);
        return;
    }
    Base::getOwnPropertyNames(thisObject, exec, propertyNames, mode);
}

bool JSDOMWindow::defineOwnProperty(JSC::JSObject* object, JSC::ExecState* exec, JSC::PropertyName propertyName, const JSC::PropertyDescriptor& descriptor, bool shouldThrow)
{
    JSDOMWindow* thisObject = jsCast<JSDOMWindow*>(object);
    // Only allow defining properties in this way by frames in the same origin, as it allows setters to be introduced.
    if (!BindingSecurity::shouldAllowAccessToDOMWindow(exec, thisObject->wrapped(), ThrowSecurityError))
        return false;

    // Don't allow shadowing location using accessor properties.
    if (descriptor.isAccessorDescriptor() && propertyName == Identifier::fromString(exec, "location"))
        return false;

    return Base::defineOwnProperty(thisObject, exec, propertyName, descriptor, shouldThrow);
}

void JSEventListener::handleEvent(ScriptExecutionContext* scriptExecutionContext, Event* event)
{
    ASSERT(scriptExecutionContext);
    if (!scriptExecutionContext || scriptExecutionContext->isJSExecutionForbidden())
        return;

    VM& vm = scriptExecutionContext->vm();
    JSLockHolder lock(vm);
    auto scope = DECLARE_CATCH_SCOPE(vm);
    // See https://dom.spec.whatwg.org/#dispatching-events spec on calling handleEvent.
    // "If this throws an exception, report the exception." It should not propagate the
    // exception.

    JSObject* jsFunction = this->jsFunction(scriptExecutionContext);
    if (!jsFunction)
        return;

    JSDOMGlobalObject* globalObject = toJSDOMGlobalObject(scriptExecutionContext, *m_isolatedWorld);
    if (!globalObject)
        return;

    if (scriptExecutionContext->isDocument()) {
        JSDOMWindow* window = jsCast<JSDOMWindow*>(globalObject);
        if (!window->wrapped().isCurrentlyDisplayedInFrame())
            return;
        if (wasCreatedFromMarkup() && !scriptExecutionContext->contentSecurityPolicy()->allowInlineEventHandlers(sourceURL(), sourcePosition().m_line))
            return;
        // FIXME: Is this check needed for other contexts?
        ScriptController& script = window->wrapped().frame()->script();
        if (!script.canExecuteScripts(AboutToExecuteScript) || script.isPaused())
            return;
    }

    ExecState* exec = globalObject->globalExec();
    JSValue handleEventFunction = jsFunction;

    CallData callData;
    CallType callType = getCallData(handleEventFunction, callData);
    // If jsFunction is not actually a function, see if it implements the EventListener interface and use that
    if (callType == CallType::None) {
        handleEventFunction = jsFunction->get(exec, Identifier::fromString(exec, "handleEvent"));
        if (UNLIKELY(scope.exception())) {
            auto* exception = scope.exception();
            scope.clearException();

            event->target()->uncaughtExceptionInEventHandler();
            reportException(exec, exception);
            return;
        }
        callType = getCallData(handleEventFunction, callData);
    }

    if (callType != CallType::None) {
        Ref<JSEventListener> protectedThis(*this);

        MarkedArgumentBuffer args;
        args.append(toJS(exec, globalObject, event));

        Event* savedEvent = globalObject->currentEvent();
        globalObject->setCurrentEvent(event);

        VMEntryScope entryScope(vm, vm.entryScope ? vm.entryScope->globalObject() : globalObject);

        InspectorInstrumentationCookie cookie = JSMainThreadExecState::instrumentFunctionCall(scriptExecutionContext, callType, callData);

        JSValue thisValue = handleEventFunction == jsFunction ? toJS(exec, globalObject, event->currentTarget()) : jsFunction;
        NakedPtr<JSC::Exception> exception;
        JSValue retval = scriptExecutionContext->isDocument()
            ? JSMainThreadExecState::profiledCall(exec, JSC::ProfilingReason::Other, handleEventFunction, callType, callData, thisValue, args, exception)
            : JSC::profiledCall(exec, JSC::ProfilingReason::Other, handleEventFunction, callType, callData, thisValue, args, exception);

        InspectorInstrumentation::didCallFunction(cookie, scriptExecutionContext);

        globalObject->setCurrentEvent(savedEvent);

        if (is<WorkerGlobalScope>(*scriptExecutionContext)) {
            auto scriptController = downcast<WorkerGlobalScope>(*scriptExecutionContext).script();
            bool terminatorCausedException = (scope.exception() && isTerminatedExecutionException(scope.exception()));
            if (terminatorCausedException || scriptController->isTerminatingExecution())
                scriptController->forbidExecution();
        }

        if (exception) {
            event->target()->uncaughtExceptionInEventHandler();
            reportException(exec, exception);
        } else {
            if (!retval.isUndefinedOrNull() && is<BeforeUnloadEvent>(*event))
                downcast<BeforeUnloadEvent>(*event).setReturnValue(retval.toWTFString(exec));
            if (m_isAttribute) {
                if (retval.isFalse())
                    event->preventDefault();
            }
        }
    }
}