C++ FrameLoader::load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 WMLGoElement::executeTask()
{
    ASSERT(document()->isWMLDocument());
    WMLDocument* document = static_cast<WMLDocument*>(this->document());

    WMLPageState* pageState = wmlPageStateForDocument(document);
    if (!pageState)
        return;

    WMLCardElement* card = document->activeCard();
    if (!card)
        return;

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

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

    String href = getAttribute(HTMLNames::hrefAttr);
    if (href.isEmpty())
        return;

    // Substitute variables within target url attribute value
    KURL url = document->completeURL(substituteVariableReferences(href, document, WMLVariableEscapingEscape));
    if (url.isEmpty())
        return;

    storeVariableState(pageState);

    // Stop the timer of the current card if it is active
    if (WMLTimerElement* eventTimer = card->eventTimer())
        eventTimer->stop();

    // FIXME: 'newcontext' handling not implemented for external cards
    bool inSameDeck = document->url().path() == url.path();
    if (inSameDeck && url.hasFragmentIdentifier()) {
        if (WMLCardElement* card = WMLCardElement::findNamedCardInDocument(document, url.fragmentIdentifier())) {
            if (card->isNewContext())
                pageState->reset();
        }
    }

    // Prepare loading the destination url
    ResourceRequest request(url);

    if (getAttribute(sendrefererAttr) == "true")
        request.setHTTPReferrer(loader->outgoingReferrer());

    String cacheControl = getAttribute(cache_controlAttr);

    if (m_formAttributes.method() == FormSubmission::PostMethod)
        preparePOSTRequest(request, inSameDeck, cacheControl);
    else
        prepareGETRequest(request, url);

    // Set HTTP cache-control header if needed
    if (!cacheControl.isEmpty()) {
        request.setHTTPHeaderField("cache-control", cacheControl);

        if (cacheControl == "no-cache")
            request.setCachePolicy(ReloadIgnoringCacheData);
    }

    loader->load(request, false);
}