C++ RenderEmbeddedObject类代码示例

bool SubframeLoader::loadPlugin(HTMLPlugInImageElement* pluginElement, const KURL& url, const String& mimeType,
    const Vector<String>& paramNames, const Vector<String>& paramValues, bool useFallback)
{
    RenderEmbeddedObject* renderer = pluginElement->renderEmbeddedObject();

    // FIXME: This code should not depend on renderer!
    if (!renderer || useFallback)
        return false;

    if (!document()->securityOrigin()->canDisplay(url)) {
        FrameLoader::reportLocalLoadFailed(m_frame, url.string());
        return false;
    }

    FrameLoader* frameLoader = m_frame->loader();
    frameLoader->checkIfRunInsecureContent(document()->securityOrigin(), url);

    IntSize contentSize(renderer->contentWidth(), renderer->contentHeight());
    bool loadManually = document()->isPluginDocument() && !m_containsPlugins;
    RefPtr<Widget> widget = frameLoader->client()->createPlugin(contentSize,
        pluginElement, url, paramNames, paramValues, mimeType, loadManually);

    if (!widget) {
        renderer->setShowsMissingPluginIndicator();
        return false;
    }

    renderer->setWidget(widget);
    m_containsPlugins = true;

#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
    pluginElement->setNeedsStyleRecalc(SyntheticStyleChange);
#endif
    return true;
}

bool SubframeLoader::pluginIsLoadable(HTMLPlugInImageElement& pluginElement, const URL& url, const String& mimeType)
{
    if (MIMETypeRegistry::isJavaAppletMIMEType(mimeType)) {
        if (!m_frame.settings().isJavaEnabled())
            return false;
        if (document() && document()->securityOrigin()->isLocal() && !m_frame.settings().isJavaEnabledForLocalFiles())
            return false;
    }

    if (document()) {
        if (document()->isSandboxed(SandboxPlugins))
            return false;

        if (!document()->securityOrigin()->canDisplay(url)) {
            FrameLoader::reportLocalLoadFailed(&m_frame, url.string());
            return false;
        }

        String declaredMimeType = document()->isPluginDocument() && document()->ownerElement() ?
            document()->ownerElement()->fastGetAttribute(HTMLNames::typeAttr) :
            pluginElement.fastGetAttribute(HTMLNames::typeAttr);
        if (!document()->contentSecurityPolicy()->allowObjectFromSource(url)
            || !document()->contentSecurityPolicy()->allowPluginType(mimeType, declaredMimeType, url)) {
            RenderEmbeddedObject* renderer = pluginElement.renderEmbeddedObject();
            renderer->setPluginUnavailabilityReason(RenderEmbeddedObject::PluginBlockedByContentSecurityPolicy);
            return false;
        }

        if (!m_frame.loader().mixedContentChecker().canRunInsecureContent(document()->securityOrigin(), url))
            return false;
    }

    return true;
}

bool HTMLPlugInElement::requestObject(const String& url, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues)
{
    if (url.isEmpty() && mimeType.isEmpty())
        return false;

    // FIXME: None of this code should use renderers!
    RenderEmbeddedObject* renderer = renderEmbeddedObject();
    ASSERT(renderer);
    if (!renderer)
        return false;

    KURL completedURL = document().completeURL(url);
    if (!pluginIsLoadable(completedURL, mimeType))
        return false;

    bool useFallback;
    if (shouldUsePlugin(completedURL, mimeType, renderer->hasFallbackContent(), useFallback))
        return loadPlugin(completedURL, mimeType, paramNames, paramValues, useFallback);

    // If the plug-in element already contains a subframe,
    // loadOrRedirectSubframe will re-use it. Otherwise, it will create a new
    // frame and set it as the RenderPart's widget, causing what was previously
    // in the widget to be torn down.
    return loadOrRedirectSubframe(completedURL, getNameAttribute(), true);
}

bool HTMLPlugInImageElement::isTopLevelFullPagePlugin(const RenderEmbeddedObject& renderer) const
{
    Frame& frame = *document().frame();
    if (!frame.isMainFrame())
        return false;
    
    auto& style = renderer.style();
    IntSize visibleSize = frame.view()->visibleSize();
    LayoutRect contentRect = renderer.contentBoxRect();
    int contentWidth = contentRect.width();
    int contentHeight = contentRect.height();
    return is100Percent(style.width()) && is100Percent(style.height()) && contentWidth * contentHeight > visibleSize.area() * sizingFullPageAreaRatioThreshold;
}

void PluginView::pluginProcessCrashed()
{
    if (!m_pluginElement->renderer())
        return;

    // FIXME: The renderer could also be a RenderApplet, we should handle that.
    if (!m_pluginElement->renderer()->isEmbeddedObject())
        return;
        
    RenderEmbeddedObject* renderer = toRenderEmbeddedObject(m_pluginElement->renderer());
    renderer->setPluginUnavailabilityReason(RenderEmbeddedObject::PluginCrashed);
    
    Widget::invalidate();
}

PassRefPtr<Widget> SubframeLoader::createJavaAppletWidget(const IntSize& size, HTMLAppletElement& element, const Vector<String>& paramNames, const Vector<String>& paramValues)
{
    String baseURLString;
    String codeBaseURLString;

    for (size_t i = 0; i < paramNames.size(); ++i) {
        if (equalLettersIgnoringASCIICase(paramNames[i], "baseurl"))
            baseURLString = paramValues[i];
        else if (equalLettersIgnoringASCIICase(paramNames[i], "codebase"))
            codeBaseURLString = paramValues[i];
    }

    if (!codeBaseURLString.isEmpty()) {
        URL codeBaseURL = completeURL(codeBaseURLString);
        if (!element.document().securityOrigin()->canDisplay(codeBaseURL)) {
            FrameLoader::reportLocalLoadFailed(&m_frame, codeBaseURL.string());
            return nullptr;
        }

        const char javaAppletMimeType[] = "application/x-java-applet";
        ASSERT(element.document().contentSecurityPolicy());
        auto& contentSecurityPolicy = *element.document().contentSecurityPolicy();
        // Elements in user agent show tree should load whatever the embedding document policy is.
        if (!element.isInUserAgentShadowTree()
            && (!contentSecurityPolicy.allowObjectFromSource(codeBaseURL) || !contentSecurityPolicy.allowPluginType(javaAppletMimeType, javaAppletMimeType, codeBaseURL)))
            return nullptr;
    }

    if (baseURLString.isEmpty())
        baseURLString = m_frame.document()->baseURL().string();
    URL baseURL = completeURL(baseURLString);

    RefPtr<Widget> widget;
    if (allowPlugins())
        widget = m_frame.loader().client().createJavaAppletWidget(size, &element, baseURL, paramNames, paramValues);

    logPluginRequest(document()->page(), element.serviceType(), String(), widget);

    if (!widget) {
        RenderEmbeddedObject* renderer = element.renderEmbeddedObject();

        if (!renderer->isPluginUnavailable())
            renderer->setPluginUnavailabilityReason(RenderEmbeddedObject::PluginMissing);
        return nullptr;
    }

    m_containsPlugins = true;
    return widget;
}

bool SubframeLoader::requestObject(HTMLPlugInImageElement* ownerElement, const String& url, const AtomicString& frameName, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues)
{
    if (url.isEmpty() && mimeType.isEmpty())
        return false;

    // FIXME: None of this code should use renderers!
    RenderEmbeddedObject* renderer = ownerElement->renderEmbeddedObject();
    ASSERT(renderer);
    if (!renderer)
        return false;

    KURL completedURL;
    if (!url.isEmpty())
        completedURL = completeURL(url);

    bool useFallback;
    if (shouldUsePlugin(completedURL, mimeType, ownerElement->shouldPreferPlugInsForImages(), renderer->hasFallbackContent(), useFallback)) {
        bool success = requestPlugin(ownerElement, completedURL, mimeType, paramNames, paramValues, useFallback);
        logPluginRequest(document()->page(), mimeType, completedURL, success);
        return success;
    }

    // If the plug-in element already contains a subframe, loadOrRedirectSubframe will re-use it. Otherwise,
    // it will create a new frame and set it as the RenderPart's widget, causing what was previously 
    // in the widget to be torn down.
    return loadOrRedirectSubframe(ownerElement, completedURL, frameName, true, true);
}

PassRefPtr<Widget> SubframeLoader::createJavaAppletWidget(const IntSize& size, HTMLAppletElement* element, const Vector<String>& paramNames, const Vector<String>& paramValues)
{
    String baseURLString;
    String codeBaseURLString;

    for (size_t i = 0; i < paramNames.size(); ++i) {
        if (equalIgnoringCase(paramNames[i], "baseurl"))
            baseURLString = paramValues[i];
        else if (equalIgnoringCase(paramNames[i], "codebase"))
            codeBaseURLString = paramValues[i];
    }

    if (!codeBaseURLString.isEmpty()) {
        URL codeBaseURL = completeURL(codeBaseURLString);
        if (!element->document().securityOrigin()->canDisplay(codeBaseURL)) {
            FrameLoader::reportLocalLoadFailed(&m_frame, codeBaseURL.string());
            return 0;
        }

        const char javaAppletMimeType[] = "application/x-java-applet";
        if (!element->document().contentSecurityPolicy()->allowObjectFromSource(codeBaseURL)
            || !element->document().contentSecurityPolicy()->allowPluginType(javaAppletMimeType, javaAppletMimeType, codeBaseURL))
            return 0;
    }

    if (baseURLString.isEmpty())
        baseURLString = m_frame.document()->baseURL().string();
    URL baseURL = completeURL(baseURLString);

    RefPtr<Widget> widget;
    if (allowPlugins(AboutToInstantiatePlugin))
        widget = m_frame.loader().client().createJavaAppletWidget(size, element, baseURL, paramNames, paramValues);

    logPluginRequest(document()->page(), element->serviceType(), String(), widget);

    if (!widget) {
        RenderEmbeddedObject* renderer = element->renderEmbeddedObject();

        if (!renderer->isPluginUnavailable())
            renderer->setPluginUnavailabilityReason(RenderEmbeddedObject::PluginMissing);
        return 0;
    }

    m_containsPlugins = true;
    return widget;
}

bool SubframeLoader::requestObject(HTMLPlugInImageElement* ownerElement, const String& url, const AtomicString& frameName,
    const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues)
{
    if (url.isEmpty() && mimeType.isEmpty())
        return false;
    
    if (!m_frame->script()->xssAuditor()->canLoadObject(url)) {
        // It is unsafe to honor the request for this object.
        return false;
    }

    // FIXME: None of this code should use renderers!
    RenderEmbeddedObject* renderer = ownerElement->renderEmbeddedObject();
    ASSERT(renderer);
    if (!renderer)
        return false;

    KURL completedURL;
    if (!url.isEmpty())
        completedURL = completeURL(url);

    bool useFallback;
    if (shouldUsePlugin(completedURL, mimeType, renderer->hasFallbackContent(), useFallback)) {
        Settings* settings = m_frame->settings();
        if ((!allowPlugins(AboutToInstantiatePlugin)
             // Application plugins are plugins implemented by the user agent, for example Qt plugins,
             // as opposed to third-party code such as flash. The user agent decides whether or not they are
             // permitted, rather than WebKit.
             && !MIMETypeRegistry::isApplicationPluginMIMEType(mimeType))
            || (!settings->isJavaEnabled() && MIMETypeRegistry::isJavaAppletMIMEType(mimeType)))
            return false;
        if (m_frame->document() && m_frame->document()->securityOrigin()->isSandboxed(SandboxPlugins))
            return false;

        ASSERT(ownerElement->hasTagName(objectTag) || ownerElement->hasTagName(embedTag));
        HTMLPlugInImageElement* pluginElement = static_cast<HTMLPlugInImageElement*>(ownerElement);

        return loadPlugin(pluginElement, completedURL, mimeType, paramNames, paramValues, useFallback);
    }

    // If the plug-in element already contains a subframe, loadOrRedirectSubframe will re-use it. Otherwise,
    // it will create a new frame and set it as the RenderPart's widget, causing what was previously 
    // in the widget to be torn down.
    return loadOrRedirectSubframe(ownerElement, completedURL, frameName, true, true);
}

bool SubframeLoader::loadPlugin(HTMLPlugInImageElement* pluginElement, const URL& url, const String& mimeType,
    const Vector<String>& paramNames, const Vector<String>& paramValues, bool useFallback)
{
    RenderEmbeddedObject* renderer = pluginElement->renderEmbeddedObject();

    // FIXME: This code should not depend on renderer!
    if (!renderer || useFallback)
        return false;

    pluginElement->subframeLoaderWillCreatePlugIn(url);

    IntSize contentSize = roundedIntSize(LayoutSize(renderer->contentWidth(), renderer->contentHeight()));
    bool loadManually = document()->isPluginDocument() && !m_containsPlugins && toPluginDocument(document())->shouldLoadPluginManually();
    RefPtr<Widget> widget = m_frame.loader().client().createPlugin(contentSize,
        pluginElement, url, paramNames, paramValues, mimeType, loadManually);

    if (!widget) {
        if (!renderer->isPluginUnavailable())
            renderer->setPluginUnavailabilityReason(RenderEmbeddedObject::PluginMissing);
        return false;
    }

    pluginElement->subframeLoaderDidCreatePlugIn(widget.get());
    renderer->setWidget(widget);
    m_containsPlugins = true;
 
#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
    pluginElement->setNeedsStyleRecalc(SyntheticStyleChange);
#endif
    return true;
}

bool SubframeLoader::loadPlugin(HTMLPlugInImageElement& pluginElement, const URL& url, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues, bool useFallback)
{
    RenderEmbeddedObject* renderer = pluginElement.renderEmbeddedObject();

    // FIXME: This code should not depend on renderer!
    if (!renderer || useFallback)
        return false;

    pluginElement.subframeLoaderWillCreatePlugIn(url);

    IntSize contentSize = roundedIntSize(LayoutSize(renderer->contentWidth(), renderer->contentHeight()));
    bool loadManually = is<PluginDocument>(*document()) && !m_containsPlugins && downcast<PluginDocument>(*document()).shouldLoadPluginManually();

#if PLATFORM(IOS)
    // On iOS, we only tell the plugin to be in full page mode if the containing plugin document is the top level document.
    if (document()->ownerElement())
        loadManually = false;
#endif

    RefPtr<Widget> widget = m_frame.loader().client().createPlugin(contentSize, &pluginElement, url, paramNames, paramValues, mimeType, loadManually);

    if (!widget) {
        if (!renderer->isPluginUnavailable())
            renderer->setPluginUnavailabilityReason(RenderEmbeddedObject::PluginMissing);
        return false;
    }

    pluginElement.subframeLoaderDidCreatePlugIn(*widget);
    renderer->setWidget(widget);
    m_containsPlugins = true;
    return true;
}

bool HTMLPlugInElement::loadPlugin(const KURL& url, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues, bool useFallback)
{
    Frame* frame = document().frame();

    if (!frame->loader().allowPlugins(AboutToInstantiatePlugin))
        return false;

    RenderEmbeddedObject* renderer = renderEmbeddedObject();
    // FIXME: This code should not depend on renderer!
    if (!renderer || useFallback)
        return false;

    WTF_LOG(Plugins, "%p Plug-in URL: %s", this, m_url.utf8().data());
    WTF_LOG(Plugins, "   Loaded URL: %s", url.string().utf8().data());
    m_loadedUrl = url;

    IntSize contentSize = roundedIntSize(LayoutSize(renderer->contentWidth(), renderer->contentHeight()));
    bool loadManually = document().isPluginDocument() && !document().containsPlugins() && toPluginDocument(document()).shouldLoadPluginManually();
    RefPtr<Widget> widget = frame->loader().client()->createPlugin(contentSize, this, url, paramNames, paramValues, mimeType, loadManually);

    if (!widget) {
        if (!renderer->showsUnavailablePluginIndicator())
            renderer->setPluginUnavailabilityReason(RenderEmbeddedObject::PluginMissing);
        return false;
    }

    renderer->setWidget(widget);
    document().setContainsPlugins();
    setNeedsStyleRecalc(LocalStyleChange, StyleChangeFromRenderer);
    return true;
}

bool HTMLPlugInElement::loadPlugin(const KURL& url, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues, bool useFallback, bool requireRenderer)
{
    LocalFrame* frame = document().frame();

    if (!frame->loader().allowPlugins(AboutToInstantiatePlugin))
        return false;

    RenderEmbeddedObject* renderer = renderEmbeddedObject();
    // FIXME: This code should not depend on renderer!
    if ((!renderer && requireRenderer) || useFallback)
        return false;

    WTF_LOG(Plugins, "%p Plug-in URL: %s", this, m_url.utf8().data());
    WTF_LOG(Plugins, "   Loaded URL: %s", url.string().utf8().data());
    m_loadedUrl = url;

    RefPtr<Widget> widget = m_persistedPluginWidget;
    if (!widget) {
        bool loadManually = document().isPluginDocument() && !document().containsPlugins() && toPluginDocument(document()).shouldLoadPluginManually();
        FrameLoaderClient::DetachedPluginPolicy policy = requireRenderer ? FrameLoaderClient::FailOnDetachedPlugin : FrameLoaderClient::AllowDetachedPlugin;
        widget = frame->loader().client()->createPlugin(this, url, paramNames, paramValues, mimeType, loadManually, policy);
    }

    if (!widget) {
        if (renderer && !renderer->showsUnavailablePluginIndicator())
            renderer->setPluginUnavailabilityReason(RenderEmbeddedObject::PluginMissing);
        return false;
    }

    if (renderer) {
        setWidget(widget);
        m_persistedPluginWidget = nullptr;
    } else if (widget != m_persistedPluginWidget) {
        m_persistedPluginWidget = widget;
    }
    document().setContainsPlugins();
    scheduleSVGFilterLayerUpdateHack();
    return true;
}

void HTMLAppletElement::updateWidgetInternal()
{
    setNeedsWidgetUpdate(false);
    // FIXME: This should ASSERT isFinishedParsingChildren() instead.
    if (!isFinishedParsingChildren())
        return;

    RenderEmbeddedObject* renderer = renderEmbeddedObject();

    LocalFrame* frame = document().frame();
    ASSERT(frame);

    Vector<String> paramNames;
    Vector<String> paramValues;

    const AtomicString& codeBase = getAttribute(codebaseAttr);
    if (!codeBase.isNull()) {
        KURL codeBaseURL = document().completeURL(codeBase);
        paramNames.append("codeBase");
        paramValues.append(codeBase.string());
    }

    const AtomicString& archive = getAttribute(archiveAttr);
    if (!archive.isNull()) {
        paramNames.append("archive");
        paramValues.append(archive.string());
    }

    const AtomicString& code = getAttribute(codeAttr);
    paramNames.append("code");
    paramValues.append(code.string());

    // If the 'codebase' attribute is set, it serves as a relative root for the file that the Java
    // plugin will load. If the 'code' attribute is set, and the 'archive' is not set, then we need
    // to check the url generated by resolving 'code' against 'codebase'. If the 'archive'
    // attribute is set, then 'code' points to a class inside the archive, so we need to check the
    // url generated by resolving 'archive' against 'codebase'.
    KURL urlToCheck;
    KURL rootURL = codeBase.isNull() ? document().url() : document().completeURL(codeBase);
    if (!archive.isNull())
        urlToCheck = KURL(rootURL, archive);
    else if (!code.isNull())
        urlToCheck = KURL(rootURL, code);
    if (!canEmbedURL(urlToCheck))
        return;

    const AtomicString& name = document().isHTMLDocument() ? getNameAttribute() : getIdAttribute();
    if (!name.isNull()) {
        paramNames.append("name");
        paramValues.append(name.string());
    }

    paramNames.append("baseURL");
    KURL baseURL = document().baseURL();
    paramValues.append(baseURL.string());

    const AtomicString& mayScript = getAttribute(mayscriptAttr);
    if (!mayScript.isNull()) {
        paramNames.append("mayScript");
        paramValues.append(mayScript.string());
    }

    for (HTMLParamElement* param = Traversal<HTMLParamElement>::firstChild(*this); param; param = Traversal<HTMLParamElement>::nextSibling(*param)) {
        if (param->name().isEmpty())
            continue;

        paramNames.append(param->name());
        paramValues.append(param->value());
    }

    OwnPtrWillBeRawPtr<PluginPlaceholder> placeholder = nullptr;
    RefPtrWillBeRawPtr<Widget> widget = nullptr;
    if (frame->loader().allowPlugins(AboutToInstantiatePlugin)) {
        placeholder = frame->loader().client()->createPluginPlaceholder(document(), KURL(), paramNames, paramValues, m_serviceType, false);
        if (!placeholder)
            widget = frame->loader().client()->createJavaAppletWidget(this, baseURL, paramNames, paramValues);
    }

    if (!placeholder && !widget) {
        if (!renderer->showsUnavailablePluginIndicator())
            renderer->setPluginUnavailabilityReason(RenderEmbeddedObject::PluginMissing);
        setPlaceholder(nullptr);
    } else if (placeholder) {
        setPlaceholder(placeholder.release());
    } else if (widget) {
        document().setContainsPlugins();
        setWidget(widget);
        setPlaceholder(nullptr);
    }
}

void HTMLAppletElement::updateWidget(PluginCreationOption)
{
    setNeedsWidgetUpdate(false);
    // FIXME: This should ASSERT isFinishedParsingChildren() instead.
    if (!isFinishedParsingChildren())
        return;

    RenderEmbeddedObject* renderer = renderEmbeddedObject();

    LayoutUnit contentWidth = renderer->style()->width().isFixed() ? LayoutUnit(renderer->style()->width().value()) :
        renderer->width() - renderer->borderAndPaddingWidth();
    LayoutUnit contentHeight = renderer->style()->height().isFixed() ? LayoutUnit(renderer->style()->height().value()) :
        renderer->height() - renderer->borderAndPaddingHeight();

    Vector<String> paramNames;
    Vector<String> paramValues;

    paramNames.append("code");
    paramValues.append(getAttribute(codeAttr).string());

    const AtomicString& codeBase = getAttribute(codebaseAttr);
    if (!codeBase.isNull()) {
        paramNames.append("codeBase");
        paramValues.append(codeBase.string());
    }

    const AtomicString& name = document()->isHTMLDocument() ? getNameAttribute() : getIdAttribute();
    if (!name.isNull()) {
        paramNames.append("name");
        paramValues.append(name.string());
    }

    const AtomicString& archive = getAttribute(archiveAttr);
    if (!archive.isNull()) {
        paramNames.append("archive");
        paramValues.append(archive.string());
    }

    paramNames.append("baseURL");
    paramValues.append(document()->baseURL().string());

    const AtomicString& mayScript = getAttribute(mayscriptAttr);
    if (!mayScript.isNull()) {
        paramNames.append("mayScript");
        paramValues.append(mayScript.string());
    }

    for (Node* child = firstChild(); child; child = child->nextSibling()) {
        if (!child->hasTagName(paramTag))
            continue;

        HTMLParamElement* param = static_cast<HTMLParamElement*>(child);
        if (param->name().isEmpty())
            continue;

        paramNames.append(param->name());
        paramValues.append(param->value());
    }

    Frame* frame = document()->frame();
    ASSERT(frame);

    renderer->setWidget(frame->loader()->subframeLoader()->createJavaAppletWidget(roundedIntSize(LayoutSize(contentWidth, contentHeight)), this, paramNames, paramValues));
}