void WebViewHost::updateAddressBar(WebView* webView)
{
    WebFrame* mainFrame = webView->mainFrame();
    WebDataSource* dataSource = mainFrame->dataSource();
    if (!dataSource)
        dataSource = mainFrame->provisionalDataSource();
    if (!dataSource)
        return;

    setAddressBarURL(dataSource->request().url());
}

// Figure out the URL of a page or subframe. Returns |page_type| as the type,
// which indicates page or subframe, or ContextNodeType::NONE if the URL could not
// be determined for some reason.
static WebURL urlFromFrame(Frame* frame)
{
    if (frame) {
        DocumentLoader* dl = frame->loader()->documentLoader();
        if (dl) {
            WebDataSource* ds = WebDataSourceImpl::fromDocumentLoader(dl);
            if (ds)
                return ds->hasUnreachableURL() ? ds->unreachableURL() : ds->request().url();
        }
    }
    return WebURL();
}

bool ChromeClientImpl::runBeforeUnloadConfirmPanel(const String& message, LocalFrame* frame)
{
    WebFrameImpl* webframe = WebFrameImpl::fromFrame(frame);

    bool isReload = false;
    WebDataSource* ds = webframe->provisionalDataSource();
    if (ds)
        isReload = (ds->navigationType() == blink::WebNavigationTypeReload);

    if (webframe->client())
        return webframe->client()->runModalBeforeUnloadDialog(isReload, message);
    return false;
}

void WebDocumentLoader::detachFromFrame()
{
    DocumentLoader::detachFromFrame();
    m_detachedDataSource = m_dataSource;
    if (m_dataSource) {
        WebDataSource* dataSourceToBeReleased = m_dataSource;
        // It's important to null out m_dataSource before calling release on the data source.  That release can cause the data
        // source to be deleted - which ends up calling loader->detachDataSource() which makes the assumption that the loader no 
        // longer holds a reference to the data source.
        m_dataSource = 0;
        dataSourceToBeReleased->Release();
    }
}

void WebDevToolsAgentImpl::didCommitProvisionalLoad(WebFrameImpl* webframe, bool isNewNavigation)
{
    if (!m_attached)
        return;
    WebDataSource* ds = webframe->dataSource();
    const WebURLRequest& request = ds->request();
    WebURL url = ds->hasUnreachableURL() ?
        ds->unreachableURL() :
        request.url();
    if (!webframe->parent()) {
        m_toolsAgentDelegateStub->frameNavigate(WebCore::KURL(url).string());
        SetApuAgentEnabledInUtilityContext(m_utilityContext, m_apuAgentEnabled);
    }
}

TEST_F(WebFrameTest, IframeRedirect)
{
    registerMockedHttpURLLoad("iframe_redirect.html");
    registerMockedHttpURLLoad("visible_iframe.html");

    WebView* webView = FrameTestHelpers::createWebViewAndLoad(m_baseURL + "iframe_redirect.html", true);
    webkit_support::RunAllPendingMessages(); // Queue the iframe.
    webkit_support::ServeAsynchronousMockedRequests(); // Load the iframe.

    WebFrame* iframe = webView->findFrameByName(WebString::fromUTF8("ifr"));
    ASSERT_TRUE(iframe);
    WebDataSource* iframeDataSource = iframe->dataSource();
    ASSERT_TRUE(iframeDataSource);
    WebVector<WebURL> redirects;
    iframeDataSource->redirectChain(redirects);
    ASSERT_EQ(2U, redirects.size());
    EXPECT_EQ(toKURL("about:blank"), toKURL(redirects[0].spec().data()));
    EXPECT_EQ(toKURL("http://www.test.com/visible_iframe.html"), toKURL(redirects[1].spec().data()));

    webView->close();
}

void WebViewHost::updateURL(WebFrame* frame)
{
    WebDataSource* ds = frame->dataSource();
    ASSERT(ds);
    const WebURLRequest& request = ds->request();
    RefPtr<TestNavigationEntry> entry(TestNavigationEntry::create());

    // The referrer will be empty on https->http transitions. It
    // would be nice if we could get the real referrer from somewhere.
    entry->setPageID(m_pageId);
    if (ds->hasUnreachableURL())
        entry->setURL(ds->unreachableURL());
    else
        entry->setURL(request.url());

    const WebHistoryItem& historyItem = frame->currentHistoryItem();
    if (!historyItem.isNull())
        entry->setContentState(historyItem);

    navigationController()->didNavigateToEntry(entry.get());
    m_lastPageIdUpdated = max(m_lastPageIdUpdated, m_pageId);
}

WebDataSource* WebDataSource::createInstance(WebDocumentLoader* loader)
{
    WebDataSource* instance = new WebDataSource(loader);
    instance->AddRef();
    return instance;
}

//.........这里部分代码省略.........
    if (!r.absoluteImageURL().isEmpty()) {
        data.srcURL = r.absoluteImageURL();
        data.mediaType = WebContextMenuData::MediaTypeImage;
    } else if (!r.absoluteMediaURL().isEmpty()) {
        data.srcURL = r.absoluteMediaURL();

        // We know that if absoluteMediaURL() is not empty, then this
        // is a media element.
        HTMLMediaElement* mediaElement =
            static_cast<HTMLMediaElement*>(r.innerNonSharedNode());
        if (mediaElement->hasTagName(HTMLNames::videoTag))
            data.mediaType = WebContextMenuData::MediaTypeVideo;
        else if (mediaElement->hasTagName(HTMLNames::audioTag))
            data.mediaType = WebContextMenuData::MediaTypeAudio;

        if (mediaElement->error())
            data.mediaFlags |= WebContextMenuData::MediaInError;
        if (mediaElement->paused())
            data.mediaFlags |= WebContextMenuData::MediaPaused;
        if (mediaElement->muted())
            data.mediaFlags |= WebContextMenuData::MediaMuted;
        if (mediaElement->loop())
            data.mediaFlags |= WebContextMenuData::MediaLoop;
        if (mediaElement->supportsSave())
            data.mediaFlags |= WebContextMenuData::MediaCanSave;
        if (mediaElement->hasAudio())
            data.mediaFlags |= WebContextMenuData::MediaHasAudio;
        if (mediaElement->hasVideo())
            data.mediaFlags |= WebContextMenuData::MediaHasVideo;
        if (mediaElement->controls())
            data.mediaFlags |= WebContextMenuData::MediaControls;
    } else if (r.innerNonSharedNode()->hasTagName(HTMLNames::objectTag)
               || r.innerNonSharedNode()->hasTagName(HTMLNames::embedTag)) {
        RenderObject* object = r.innerNonSharedNode()->renderer();
        if (object && object->isWidget()) {
            Widget* widget = toRenderWidget(object)->widget();
            if (widget && widget->isPluginContainer()) {
                WebPluginContainerImpl* plugin = static_cast<WebPluginContainerImpl*>(widget);
                WebString text = plugin->plugin()->selectionAsText();
                if (!text.isEmpty()) {
                    data.selectedText = text;
                    data.editFlags |= WebContextMenuData::CanCopy;
                }
                data.editFlags &= ~WebContextMenuData::CanTranslate;
                data.linkURL = plugin->plugin()->linkAtPosition(data.mousePosition);
            }
        }
    }

    data.isImageBlocked =
        (data.mediaType == WebContextMenuData::MediaTypeImage) && !r.image();

    // If it's not a link, an image, a media element, or an image/media link,
    // show a selection menu or a more generic page menu.
    data.frameEncoding = selectedFrame->loader()->writer()->encoding();

    // Send the frame and page URLs in any case.
    data.pageURL = urlFromFrame(m_webView->mainFrameImpl()->frame());
    if (selectedFrame != m_webView->mainFrameImpl()->frame())
        data.frameURL = urlFromFrame(selectedFrame);

    if (r.isSelected())
        data.selectedText = selectedFrame->editor()->selectedText().stripWhiteSpace();

    if (r.isContentEditable()) {
        data.isEditable = true;
        if (m_webView->focusedWebCoreFrame()->editor()->isContinuousSpellCheckingEnabled()) {
            data.isSpellCheckingEnabled = true;
            // Spellchecking might be enabled for the field, but could be disabled on the node.
            if (m_webView->focusedWebCoreFrame()->editor()->spellCheckingEnabledInFocusedNode())
                data.misspelledWord = selectMisspelledWord(defaultMenu, selectedFrame);
        }
    }

#if OS(DARWIN)
    ExceptionCode ec = 0;
    RefPtr<CSSStyleDeclaration> style = selectedFrame->document()->createCSSStyleDeclaration();
    style->setProperty(CSSPropertyDirection, "ltr", false, ec);
    if (selectedFrame->editor()->selectionHasStyle(style.get()) != FalseTriState)
        data.writingDirectionLeftToRight |= WebContextMenuData::CheckableMenuItemChecked;
    style->setProperty(CSSPropertyDirection, "rtl", false, ec);
    if (selectedFrame->editor()->selectionHasStyle(style.get()) != FalseTriState)
        data.writingDirectionRightToLeft |= WebContextMenuData::CheckableMenuItemChecked;
#endif // OS(DARWIN)

    // Now retrieve the security info.
    DocumentLoader* dl = selectedFrame->loader()->documentLoader();
    WebDataSource* ds = WebDataSourceImpl::fromDocumentLoader(dl);
    if (ds)
        data.securityInfo = ds->response().securityInfo();

    // Filter out custom menu elements and add them into the data.
    populateCustomMenuItems(defaultMenu, &data);

    WebFrame* selected_web_frame = WebFrameImpl::fromFrame(selectedFrame);
    if (m_webView->client())
        m_webView->client()->showContextMenu(selected_web_frame, data);

    return 0;
}

//.........这里部分代码省略.........
            }
        }
    }

    // An image can to be null for many reasons, like being blocked, no image
    // data received from server yet.
    data.hasImageContents =
        (data.mediaType == WebContextMenuData::MediaTypeImage)
        && r.image() && !(r.image()->isNull());

    // If it's not a link, an image, a media element, or an image/media link,
    // show a selection menu or a more generic page menu.
    if (selectedFrame->document()->loader())
        data.frameEncoding = selectedFrame->document()->encodingName();

    // Send the frame and page URLs in any case.
    data.pageURL = urlFromFrame(m_webView->mainFrameImpl()->frame());
    if (selectedFrame != m_webView->mainFrameImpl()->frame()) {
        data.frameURL = urlFromFrame(selectedFrame);
        RefPtr<HistoryItem> historyItem = selectedFrame->loader().currentItem();
        if (historyItem)
            data.frameHistoryItem = WebHistoryItem(historyItem);
    }

    if (r.isSelected()) {
        if (!isHTMLInputElement(*r.innerNonSharedNode()) || !toHTMLInputElement(r.innerNonSharedNode())->isPasswordField())
            data.selectedText = selectedFrame->selectedText().stripWhiteSpace();
    }

    if (r.isContentEditable()) {
        data.isEditable = true;

        // When Chrome enables asynchronous spellchecking, its spellchecker adds spelling markers to misspelled
        // words and attaches suggestions to these markers in the background. Therefore, when a user right-clicks
        // a mouse on a word, Chrome just needs to find a spelling marker on the word instead of spellchecking it.
        if (selectedFrame->settings() && selectedFrame->settings()->asynchronousSpellCheckingEnabled()) {
            DocumentMarker marker;
            data.misspelledWord = selectMisspellingAsync(selectedFrame, marker);
            data.misspellingHash = marker.hash();
            if (marker.description().length()) {
                Vector<String> suggestions;
                marker.description().split('\n', suggestions);
                data.dictionarySuggestions = suggestions;
            } else if (m_webView->spellCheckClient()) {
                int misspelledOffset, misspelledLength;
                m_webView->spellCheckClient()->spellCheck(data.misspelledWord, misspelledOffset, misspelledLength, &data.dictionarySuggestions);
            }
        } else {
            data.isSpellCheckingEnabled =
                toLocalFrame(m_webView->focusedWebCoreFrame())->spellChecker().isContinuousSpellCheckingEnabled();
            // Spellchecking might be enabled for the field, but could be disabled on the node.
            if (toLocalFrame(m_webView->focusedWebCoreFrame())->spellChecker().isSpellCheckingEnabledInFocusedNode()) {
                data.misspelledWord = selectMisspelledWord(selectedFrame);
                if (m_webView->spellCheckClient()) {
                    int misspelledOffset, misspelledLength;
                    m_webView->spellCheckClient()->spellCheck(
                        data.misspelledWord, misspelledOffset, misspelledLength,
                        &data.dictionarySuggestions);
                    if (!misspelledLength)
                        data.misspelledWord.reset();
                }
            }
        }
        HTMLFormElement* form = selectedFrame->selection().currentForm();
        if (form && isHTMLInputElement(*r.innerNonSharedNode())) {
            HTMLInputElement& selectedElement = toHTMLInputElement(*r.innerNonSharedNode());
            WebSearchableFormData ws = WebSearchableFormData(WebFormElement(form), WebInputElement(&selectedElement));
            if (ws.url().isValid())
                data.keywordURL = ws.url();
        }
    }

    if (selectedFrame->editor().selectionHasStyle(CSSPropertyDirection, "ltr") != FalseTriState)
        data.writingDirectionLeftToRight |= WebContextMenuData::CheckableMenuItemChecked;
    if (selectedFrame->editor().selectionHasStyle(CSSPropertyDirection, "rtl") != FalseTriState)
        data.writingDirectionRightToLeft |= WebContextMenuData::CheckableMenuItemChecked;

    // Now retrieve the security info.
    DocumentLoader* dl = selectedFrame->loader().documentLoader();
    WebDataSource* ds = WebDataSourceImpl::fromDocumentLoader(dl);
    if (ds)
        data.securityInfo = ds->response().securityInfo();

    data.referrerPolicy = static_cast<WebReferrerPolicy>(selectedFrame->document()->referrerPolicy());

    // Filter out custom menu elements and add them into the data.
    populateCustomMenuItems(defaultMenu, &data);

    // Extract suggested filename for saving file.
    if (isHTMLAnchorElement(r.URLElement())) {
        HTMLAnchorElement* anchor = toHTMLAnchorElement(r.URLElement());
        data.suggestedFilename = anchor->fastGetAttribute(HTMLNames::downloadAttr);
    }

    data.node = r.innerNonSharedNode();

    WebLocalFrameImpl* selectedWebFrame = WebLocalFrameImpl::fromFrame(selectedFrame);
    if (selectedWebFrame->client())
        selectedWebFrame->client()->showContextMenu(data);
}