C++ FrameLoader::policyChecker方法代码示例

bool SVGImage::dataChanged(bool allDataReceived)
{
    // Don't do anything if is an empty image.
    if (!data()->size())
        return true;

    if (allDataReceived) {
        static FrameLoaderClient* dummyFrameLoaderClient =  new EmptyFrameLoaderClient;

        Page::PageClients pageClients;
        m_chromeClient = adoptPtr(new SVGImageChromeClient(this));
        pageClients.chromeClient = m_chromeClient.get();
#if ENABLE(CONTEXT_MENUS)
        static ContextMenuClient* dummyContextMenuClient = new EmptyContextMenuClient;
        pageClients.contextMenuClient = dummyContextMenuClient;
#endif
        static EditorClient* dummyEditorClient = new EmptyEditorClient;
        pageClients.editorClient = dummyEditorClient;
#if ENABLE(DRAG_SUPPORT)
        static DragClient* dummyDragClient = new EmptyDragClient;
        pageClients.dragClient = dummyDragClient;
#endif
        static InspectorClient* dummyInspectorClient = new EmptyInspectorClient;
        pageClients.inspectorClient = dummyInspectorClient;
#if ENABLE(DEVICE_ORIENTATION)
        static DeviceMotionClient* dummyDeviceMotionClient = new EmptyDeviceMotionClient;
        pageClients.deviceMotionClient = dummyDeviceMotionClient;
        static DeviceOrientationClient* dummyDeviceOrientationClient = new EmptyDeviceOrientationClient;
        pageClients.deviceOrientationClient = dummyDeviceOrientationClient;
#endif

        // FIXME: If this SVG ends up loading itself, we might leak the world.
        // The comment said that the Cache code does not know about CachedImages
        // holding Frames and won't know to break the cycle. But 
        m_page.set(new Page(pageClients));
        m_page->settings()->setMediaEnabled(false);
        m_page->settings()->setJavaScriptEnabled(false);
        m_page->settings()->setPluginsEnabled(false);

        RefPtr<Frame> frame = Frame::create(m_page.get(), 0, dummyFrameLoaderClient);
        frame->setView(FrameView::create(frame.get()));
        frame->init();
        ResourceRequest fakeRequest(KURL(ParsedURLString, ""));
        FrameLoader* loader = frame->loader();
        loader->setForcedSandboxFlags(SandboxAll);
        loader->load(fakeRequest, false); // Make sure the DocumentLoader is created
        loader->policyChecker()->cancelCheck(); // cancel any policy checks
        loader->commitProvisionalLoad();
        loader->writer()->setMIMEType("image/svg+xml");
        loader->writer()->begin(KURL()); // create the empty document
        loader->writer()->addData(data()->data(), data()->size());
        loader->writer()->end();
        frame->view()->setTransparent(true); // SVG Images are transparent.
    }

    return m_page;
}

void WMLCardElement::handleIntrinsicEventIfNeeded()
{
    WMLPageState* pageState = wmlPageStateForDocument(document());
    if (!pageState)
        return;

    Frame* frame = document()->frame();
    if (!frame)
        return;

    FrameLoader* loader = frame->loader();
    if (!loader)
        return;

    // Calculate the entry method of current card 
    WMLIntrinsicEventType eventType = WMLIntrinsicEventUnknown;

    switch (loader->policyChecker()->loadType()) {
    case FrameLoadTypeReload:
        break;
    case FrameLoadTypeBack:
        eventType = WMLIntrinsicEventOnEnterBackward;
        break;
    case FrameLoadTypeBackWMLDeckNotAccessible:
        reportWMLError(document(), WMLErrorDeckNotAccessible);
        return;
    default:
        eventType = WMLIntrinsicEventOnEnterForward;
        break;
    }

    // Figure out target event handler
    WMLIntrinsicEventHandler* eventHandler = this->eventHandler();
    bool hasIntrinsicEvent = false;

    if (eventType != WMLIntrinsicEventUnknown) {
        if (eventHandler && eventHandler->hasIntrinsicEvent(eventType))
            hasIntrinsicEvent = true;
        else if (m_template) {
            eventHandler = m_template->eventHandler();
            if (eventHandler && eventHandler->hasIntrinsicEvent(eventType))
                hasIntrinsicEvent = true;
        }
    }
 
    if (hasIntrinsicEvent)
        eventHandler->triggerIntrinsicEvent(eventType);

    // Start the timer if it exists in current card
    if (m_eventTimer && eventType != WMLIntrinsicEventOnEnterBackward)
        m_eventTimer->start();
    /*guoxiaolei 20120827 end>*/

    for (Node* node = traverseNextNode(); node != 0; node = node->traverseNextNode()) {
        if (!node->isElementNode())
            continue;

        if (node->hasTagName(inputTag))
            static_cast<WMLInputElement*>(node)->initialize();
        else if (node->hasTagName(selectTag))
            static_cast<WMLSelectElement*>(node)->selectInitialOptions();
    }
}

void WMLCardElement::handleIntrinsicEventIfNeeded()
{
    WMLPageState* pageState = wmlPageStateForDocument(document());
    if (!pageState)
        return;

    Frame* frame = document()->frame();
    if (!frame)
        return;

    FrameLoader* loader = frame->loader();
    if (!loader)
        return;

    // Calculate the entry method of current card 
    WMLIntrinsicEventType eventType = WMLIntrinsicEventUnknown;

    switch (loader->policyChecker()->loadType()) {
    case FrameLoadTypeReload:
        break;
    case FrameLoadTypeBack:
        eventType = WMLIntrinsicEventOnEnterBackward;
        break;
    case FrameLoadTypeBackWMLDeckNotAccessible:
        reportWMLError(document(), WMLErrorDeckNotAccessible);
        return;
    default:
        eventType = WMLIntrinsicEventOnEnterForward;
        break;
    }

    // Figure out target event handler
    WMLIntrinsicEventHandler* eventHandler = this->eventHandler();
    bool hasIntrinsicEvent = false;

    if (eventType != WMLIntrinsicEventUnknown) {
        if (eventHandler && eventHandler->hasIntrinsicEvent(eventType))
            hasIntrinsicEvent = true;
        else if (m_template) {
            eventHandler = m_template->eventHandler();
            if (eventHandler && eventHandler->hasIntrinsicEvent(eventType))
                hasIntrinsicEvent = true;
        }
    }
    // SAMSUNG_WML_FIXES+
    // http://spe.mobilephone.net/wit/wmlv2/structemp.wml
	if (hasIntrinsicEvent) {
		RefPtr<NodeList> children = childNodes();

		if (children) {
			unsigned length = children->length();
			for (unsigned i = 0; i < length; ++i) {
				Node* child = children->item(i);
				if (!child->isElementNode())
					continue;

				if (child->hasTagName(oneventTag)) {
					WMLOnEventElement* onEventElement = static_cast<WMLOnEventElement*>(child);
					if (onEventElement->eventType() == eventType && onEventElement->isNoop()) {
						hasIntrinsicEvent = false;
						break;
					}
				}
			}
		}
	}
    // SAMSUNG_WML_FIXES-

    if (hasIntrinsicEvent)
        eventHandler->triggerIntrinsicEvent(eventType);

    // Start the timer if it exists in current card
    if (m_eventTimer)
        m_eventTimer->start();

    for (Node* node = traverseNextNode(); node != 0; node = node->traverseNextNode()) {
        if (!node->isElementNode())
            continue;

        if (node->hasTagName(inputTag))
            static_cast<WMLInputElement*>(node)->initialize();
        else if (node->hasTagName(selectTag))
            static_cast<WMLSelectElement*>(node)->selectInitialOptions();
    }
}