FCL/sf/mw/qtwebkit: comparison WebCore/loader/FrameLoader.cpp

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+:4f2f89ce4247
+/*
+* Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
+* Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
+* Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
+* Copyright (C) 2008 Alp Toker <alp@atoker.com>
+* Copyright (C) Research In Motion Limited 2009. All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions
+* are met:
+*
+* 1.  Redistributions of source code must retain the above copyright
+*     notice, this list of conditions and the following disclaimer.
+* 2.  Redistributions in binary form must reproduce the above copyright
+*     notice, this list of conditions and the following disclaimer in the
+*     documentation and/or other materials provided with the distribution.
+* 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+*     its contributors may be used to endorse or promote products derived
+*     from this software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+#include "config.h"
+#include "FrameLoader.h"
+#include "ApplicationCacheHost.h"
+#include "Archive.h"
+#include "ArchiveFactory.h"
+#include "BackForwardList.h"
+#include "BeforeUnloadEvent.h"
+#include "Cache.h"
+#include "CachedPage.h"
+#include "Chrome.h"
+#include "DOMImplementation.h"
+#include "DOMWindow.h"
+#include "DocLoader.h"
+#include "Document.h"
+#include "DocumentLoader.h"
+#include "Editor.h"
+#include "EditorClient.h"
+#include "Element.h"
+#include "Event.h"
+#include "EventNames.h"
+#include "FloatRect.h"
+#include "FormState.h"
+#include "FormSubmission.h"
+#include "Frame.h"
+#include "FrameLoadRequest.h"
+#include "FrameLoaderClient.h"
+#include "FrameTree.h"
+#include "FrameView.h"
+#include "HTMLAnchorElement.h"
+#include "HTMLFormElement.h"
+#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+#include "HTMLMediaElement.h"
+#endif
+#include "HTMLNames.h"
+#include "HTMLObjectElement.h"
+#include "HTTPParsers.h"
+#include "HistoryItem.h"
+#include "IconDatabase.h"
+#include "IconLoader.h"
+#include "InspectorController.h"
+#include "Logging.h"
+#include "MIMETypeRegistry.h"
+#include "MainResourceLoader.h"
+#include "Page.h"
+#include "PageCache.h"
+#include "PageGroup.h"
+#include "PageTransitionEvent.h"
+#include "PlaceholderDocument.h"
+#include "PluginData.h"
+#include "PluginDatabase.h"
+#include "PluginDocument.h"
+#include "ProgressTracker.h"
+#include "ResourceHandle.h"
+#include "ResourceRequest.h"
+#include "SchemeRegistry.h"
+#include "ScriptController.h"
+#include "ScriptSourceCode.h"
+#include "ScriptString.h"
+#include "ScriptValue.h"
+#include "SecurityOrigin.h"
+#include "SegmentedString.h"
+#include "Settings.h"
+#include "TextResourceDecoder.h"
+#include "WindowFeatures.h"
+#include "XMLDocumentParser.h"
+#include <wtf/CurrentTime.h>
+#include <wtf/StdLibExtras.h>
+#include <wtf/text/CString.h>
+#if ENABLE(SHARED_WORKERS)
+#include "SharedWorkerRepository.h"
+#endif
+#if ENABLE(SVG)
+#include "SVGDocument.h"
+#include "SVGLocatable.h"
+#include "SVGNames.h"
+#include "SVGPreserveAspectRatio.h"
+#include "SVGSVGElement.h"
+#include "SVGViewElement.h"
+#include "SVGViewSpec.h"
+#endif
+namespace WebCore {
+using namespace HTMLNames;
+#if ENABLE(SVG)
+using namespace SVGNames;
+#endif
+#if ENABLE(XHTMLMP)
+static const char defaultAcceptHeader[] = "application/xml,application/vnd.wap.xhtml+xml,application/xhtml+xml;profile='http://www.wapforum.org/xhtml',text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5";
+#else
+static const char defaultAcceptHeader[] = "application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5";
+#endif
+static double storedTimeOfLastCompletedLoad;
+bool isBackForwardLoadType(FrameLoadType type)
+{
+switch (type) {
+case FrameLoadTypeStandard:
+case FrameLoadTypeReload:
+case FrameLoadTypeReloadFromOrigin:
+case FrameLoadTypeSame:
+case FrameLoadTypeRedirectWithLockedBackForwardList:
+case FrameLoadTypeReplace:
+return false;
+case FrameLoadTypeBack:
+case FrameLoadTypeBackWMLDeckNotAccessible:
+case FrameLoadTypeForward:
+case FrameLoadTypeIndexedBackForward:
+return true;
+}
+ASSERT_NOT_REACHED();
+return false;
+}
+static int numRequests(Document* document)
+{
+if (!document)
+return 0;
+return document->docLoader()->requestCount();
+}
+static inline bool canReferToParentFrameEncoding(const Frame* frame, const Frame* parentFrame)
+{
+return parentFrame && parentFrame->document()->securityOrigin()->canAccess(frame->document()->securityOrigin());
+}
+// This is not in the FrameLoader class to emphasize that it does not depend on
+// private FrameLoader data, and to avoid increasing the number of public functions
+// with access to private data.  Since only this .cpp file needs it, making it
+// non-member lets us exclude it from the header file, thus keeping FrameLoader.h's
+// API simpler.
+//
+// FIXME: isDocumentSandboxed should eventually replace isSandboxed.
+static bool isDocumentSandboxed(Frame* frame, SandboxFlags mask)
+{
+return frame->document() && frame->document()->securityOrigin()->isSandboxed(mask);
+}
+FrameLoader::FrameLoader(Frame* frame, FrameLoaderClient* client)
+: m_frame(frame)
+, m_client(client)
+, m_policyChecker(frame)
+, m_history(frame)
+, m_notifer(frame)
+, m_writer(frame)
+, m_subframeLoader(frame)
+, m_state(FrameStateCommittedPage)
+, m_loadType(FrameLoadTypeStandard)
+, m_delegateIsHandlingProvisionalLoadError(false)
+, m_quickRedirectComing(false)
+, m_sentRedirectNotification(false)
+, m_inStopAllLoaders(false)
+, m_isExecutingJavaScriptFormAction(false)
+, m_didCallImplicitClose(false)
+, m_wasUnloadEventEmitted(false)
+, m_pageDismissalEventBeingDispatched(false)
+, m_isComplete(false)
+, m_isLoadingMainResource(false)
+, m_needsClear(false)
+, m_checkTimer(this, &FrameLoader::checkTimerFired)
+, m_shouldCallCheckCompleted(false)
+, m_shouldCallCheckLoadComplete(false)
+, m_opener(0)
+, m_didPerformFirstNavigation(false)
+, m_loadingFromCachedPage(false)
+, m_suppressOpenerInNewFrame(false)
+, m_sandboxFlags(SandboxAll)
+, m_forcedSandboxFlags(SandboxNone)
+#ifndef NDEBUG
+, m_didDispatchDidCommitLoad(false)
+#endif
+{
+}
+FrameLoader::~FrameLoader()
+{
+setOpener(0);
+HashSet<Frame*>::iterator end = m_openedFrames.end();
+for (HashSet<Frame*>::iterator it = m_openedFrames.begin(); it != end; ++it)
+(*it)->loader()->m_opener = 0;
+m_client->frameLoaderDestroyed();
+}
+void FrameLoader::init()
+{
+// Propagate sandbox attributes to this Frameloader and its descendants.
+// This needs to be done early, so that an initial document gets correct sandbox flags in its SecurityOrigin.
+updateSandboxFlags();
+// this somewhat odd set of steps is needed to give the frame an initial empty document
+m_stateMachine.advanceTo(FrameLoaderStateMachine::CreatingInitialEmptyDocument);
+setPolicyDocumentLoader(m_client->createDocumentLoader(ResourceRequest(KURL(ParsedURLString, "")), SubstituteData()).get());
+setProvisionalDocumentLoader(m_policyDocumentLoader.get());
+setState(FrameStateProvisional);
+m_provisionalDocumentLoader->setResponse(ResourceResponse(KURL(), "text/html", 0, String(), String()));
+m_provisionalDocumentLoader->finishedLoading();
+writer()->begin(KURL(), false);
+writer()->end();
+m_frame->document()->cancelParsing();
+m_stateMachine.advanceTo(FrameLoaderStateMachine::DisplayingInitialEmptyDocument);
+m_didCallImplicitClose = true;
+}
+void FrameLoader::setDefersLoading(bool defers)
+{
+if (m_documentLoader)
+m_documentLoader->setDefersLoading(defers);
+if (m_provisionalDocumentLoader)
+m_provisionalDocumentLoader->setDefersLoading(defers);
+if (m_policyDocumentLoader)
+m_policyDocumentLoader->setDefersLoading(defers);
+if (!defers) {
+m_frame->redirectScheduler()->startTimer();
+startCheckCompleteTimer();
+}
+}
+Frame* FrameLoader::createWindow(FrameLoader* frameLoaderForFrameLookup, const FrameLoadRequest& request, const WindowFeatures& features, bool& created)
+{
+ASSERT(!features.dialog || request.frameName().isEmpty());
+if (!request.frameName().isEmpty() && request.frameName() != "_blank") {
+Frame* frame = frameLoaderForFrameLookup->frame()->tree()->find(request.frameName());
+if (frame && shouldAllowNavigation(frame)) {
+if (!request.resourceRequest().url().isEmpty())
+frame->loader()->loadFrameRequest(request, false, false, 0, 0, SendReferrer);
+if (Page* page = frame->page())
+page->chrome()->focus();
+created = false;
+return frame;
+}
+}
+// Sandboxed frames cannot open new auxiliary browsing contexts.
+if (isDocumentSandboxed(m_frame, SandboxNavigation))
+return 0;
+// FIXME: Setting the referrer should be the caller's responsibility.
+FrameLoadRequest requestWithReferrer = request;
+requestWithReferrer.resourceRequest().setHTTPReferrer(m_outgoingReferrer);
+addHTTPOriginIfNeeded(requestWithReferrer.resourceRequest(), outgoingOrigin());
+Page* oldPage = m_frame->page();
+if (!oldPage)
+return 0;
+Page* page = oldPage->chrome()->createWindow(m_frame, requestWithReferrer, features);
+if (!page)
+return 0;
+Frame* frame = page->mainFrame();
+if (request.frameName() != "_blank")
+frame->tree()->setName(request.frameName());
+page->chrome()->setToolbarsVisible(features.toolBarVisible || features.locationBarVisible);
+page->chrome()->setStatusbarVisible(features.statusBarVisible);
+page->chrome()->setScrollbarsVisible(features.scrollbarsVisible);
+page->chrome()->setMenubarVisible(features.menuBarVisible);
+page->chrome()->setResizable(features.resizable);
+// 'x' and 'y' specify the location of the window, while 'width' and 'height'
+// specify the size of the page. We can only resize the window, so
+// adjust for the difference between the window size and the page size.
+FloatRect windowRect = page->chrome()->windowRect();
+FloatSize pageSize = page->chrome()->pageRect().size();
+if (features.xSet)
+windowRect.setX(features.x);
+if (features.ySet)
+windowRect.setY(features.y);
+if (features.widthSet)
+windowRect.setWidth(features.width + (windowRect.width() - pageSize.width()));
+if (features.heightSet)
+windowRect.setHeight(features.height + (windowRect.height() - pageSize.height()));
+page->chrome()->setWindowRect(windowRect);
+page->chrome()->show();
+created = true;
+return frame;
+}
+bool FrameLoader::canHandleRequest(const ResourceRequest& request)
+{
+return m_client->canHandleRequest(request);
+}
+void FrameLoader::changeLocation(const KURL& url, const String& referrer, bool lockHistory, bool lockBackForwardList, bool userGesture, bool refresh)
+{
+RefPtr<Frame> protect(m_frame);
+ResourceRequest request(url, referrer, refresh ? ReloadIgnoringCacheData : UseProtocolCachePolicy);
+urlSelected(request, "_self", 0, lockHistory, lockBackForwardList, userGesture, SendReferrer, ReplaceDocumentIfJavaScriptURL);
+}
+void FrameLoader::urlSelected(const KURL& url, const String& passedTarget, PassRefPtr<Event> triggeringEvent, bool lockHistory, bool lockBackForwardList, bool userGesture, ReferrerPolicy referrerPolicy)
+{
+urlSelected(ResourceRequest(url), passedTarget, triggeringEvent, lockHistory, lockBackForwardList, userGesture, referrerPolicy, DoNotReplaceDocumentIfJavaScriptURL);
+}
+// The shouldReplaceDocumentIfJavaScriptURL parameter will go away when the FIXME to eliminate the
+// corresponding parameter from ScriptController::executeIfJavaScriptURL() is addressed.
+void FrameLoader::urlSelected(const ResourceRequest& request, const String& passedTarget, PassRefPtr<Event> triggeringEvent, bool lockHistory, bool lockBackForwardList, bool userGesture, ReferrerPolicy referrerPolicy, ShouldReplaceDocumentIfJavaScriptURL shouldReplaceDocumentIfJavaScriptURL)
+{
+ASSERT(!m_suppressOpenerInNewFrame);
+if (m_frame->script()->executeIfJavaScriptURL(request.url(), userGesture, shouldReplaceDocumentIfJavaScriptURL))
+return;
+String target = passedTarget;
+if (target.isEmpty())
+target = m_frame->document()->baseTarget();
+FrameLoadRequest frameRequest(request, target);
+if (referrerPolicy == NoReferrer)
+m_suppressOpenerInNewFrame = true;
+else if (frameRequest.resourceRequest().httpReferrer().isEmpty())
+frameRequest.resourceRequest().setHTTPReferrer(m_outgoingReferrer);
+addHTTPOriginIfNeeded(frameRequest.resourceRequest(), outgoingOrigin());
+loadFrameRequest(frameRequest, lockHistory, lockBackForwardList, triggeringEvent, 0, referrerPolicy);
+m_suppressOpenerInNewFrame = false;
+}
+void FrameLoader::submitForm(PassRefPtr<FormSubmission> submission)
+{
+ASSERT(submission->method() == FormSubmission::PostMethod || submission->method() == FormSubmission::GetMethod);
+// FIXME: Find a good spot for these.
+ASSERT(submission->data());
+ASSERT(submission->state());
+ASSERT(submission->state()->sourceFrame() == m_frame);
+if (!m_frame->page())
+return;
+if (submission->action().isEmpty())
+return;
+if (isDocumentSandboxed(m_frame, SandboxForms))
+return;
+if (protocolIsJavaScript(submission->action())) {
+m_isExecutingJavaScriptFormAction = true;
+m_frame->script()->executeIfJavaScriptURL(submission->action(), false, DoNotReplaceDocumentIfJavaScriptURL);
+m_isExecutingJavaScriptFormAction = false;
+return;
+}
+Frame* targetFrame = m_frame->tree()->find(submission->target());
+if (!shouldAllowNavigation(targetFrame))
+return;
+if (!targetFrame) {
+if (!DOMWindow::allowPopUp(m_frame) && !isProcessingUserGesture())
+return;
+targetFrame = m_frame;
+} else
+submission->clearTarget();
+if (!targetFrame->page())
+return;
+// FIXME: We'd like to remove this altogether and fix the multiple form submission issue another way.
+// We do not want to submit more than one form from the same page, nor do we want to submit a single
+// form more than once. This flag prevents these from happening; not sure how other browsers prevent this.
+// The flag is reset in each time we start handle a new mouse or key down event, and
+// also in setView since this part may get reused for a page from the back/forward cache.
+// The form multi-submit logic here is only needed when we are submitting a form that affects this frame.
+// FIXME: Frame targeting is only one of the ways the submission could end up doing something other
+// than replacing this frame's content, so this check is flawed. On the other hand, the check is hardly
+// needed any more now that we reset m_submittedFormURL on each mouse or key down event.
+if (m_frame->tree()->isDescendantOf(targetFrame)) {
+if (m_submittedFormURL == submission->action())
+return;
+m_submittedFormURL = submission->action();
+}
+submission->data()->generateFiles(m_frame->document());
+submission->setReferrer(m_outgoingReferrer);
+submission->setOrigin(outgoingOrigin());
+targetFrame->redirectScheduler()->scheduleFormSubmission(submission);
+}
+void FrameLoader::stopLoading(UnloadEventPolicy unloadEventPolicy, DatabasePolicy databasePolicy)
+{
+if (m_frame->document() && m_frame->document()->parser())
+m_frame->document()->parser()->stopParsing();
+if (unloadEventPolicy != UnloadEventPolicyNone) {
+if (m_frame->document()) {
+if (m_didCallImplicitClose && !m_wasUnloadEventEmitted) {
+Node* currentFocusedNode = m_frame->document()->focusedNode();
+if (currentFocusedNode)
+currentFocusedNode->aboutToUnload();
+m_pageDismissalEventBeingDispatched = true;
+if (m_frame->domWindow()) {
+if (unloadEventPolicy == UnloadEventPolicyUnloadAndPageHide)
+m_frame->domWindow()->dispatchEvent(PageTransitionEvent::create(eventNames().pagehideEvent, m_frame->document()->inPageCache()), m_frame->document());
+if (!m_frame->document()->inPageCache()) {
+m_frame->domWindow()->dispatchEvent(Event::create(eventNames().unloadEvent, false, false), m_frame->domWindow()->document());
+if (m_provisionalDocumentLoader) {
+DocumentLoadTiming* timing = m_provisionalDocumentLoader->timing();
+ASSERT(timing->navigationStart);
+// FIXME: This fails in Safari (https://bugs.webkit.org/show_bug.cgi?id=42772). Understand why.
+// ASSERT(!timing->unloadEventEnd);
+timing->unloadEventEnd = currentTime();
+ASSERT(timing->unloadEventEnd >= timing->navigationStart);
+}
+}
+}
+m_pageDismissalEventBeingDispatched = false;
+if (m_frame->document())
+m_frame->document()->updateStyleIfNeeded();
+m_wasUnloadEventEmitted = true;
+}
+}
+// Dispatching the unload event could have made m_frame->document() null.
+if (m_frame->document() && !m_frame->document()->inPageCache()) {
+// Don't remove event listeners from a transitional empty document (see bug 28716 for more information).
+bool keepEventListeners = m_stateMachine.isDisplayingInitialEmptyDocument() && m_provisionalDocumentLoader
+&& m_frame->document()->securityOrigin()->isSecureTransitionTo(m_provisionalDocumentLoader->url());
+if (!keepEventListeners)
+m_frame->document()->removeAllEventListeners();
+}
+}
+m_isComplete = true; // to avoid calling completed() in finishedParsing()
+m_isLoadingMainResource = false;
+m_didCallImplicitClose = true; // don't want that one either
+if (m_frame->document() && m_frame->document()->parsing()) {
+finishedParsing();
+m_frame->document()->setParsing(false);
+}
+m_workingURL = KURL();
+if (Document* doc = m_frame->document()) {
+if (DocLoader* docLoader = doc->docLoader())
+cache()->loader()->cancelRequests(docLoader);
+#if ENABLE(DATABASE)
+if (databasePolicy == DatabasePolicyStop)
+doc->stopDatabases(0);
+#else
+UNUSED_PARAM(databasePolicy);
+#endif
+}
+// FIXME: This will cancel redirection timer, which really needs to be restarted when restoring the frame from b/f cache.
+m_frame->redirectScheduler()->cancel();
+}
+void FrameLoader::stop()
+{
+// http://bugs.webkit.org/show_bug.cgi?id=10854
+// The frame's last ref may be removed and it will be deleted by checkCompleted().
+RefPtr<Frame> protector(m_frame);
+if (m_frame->document()->parser())
+m_frame->document()->parser()->stopParsing();
+m_frame->document()->finishParsing();
+if (m_iconLoader)
+m_iconLoader->stopLoading();
+}
+bool FrameLoader::closeURL()
+{
+history()->saveDocumentState();
+// Should only send the pagehide event here if the current document exists and has not been placed in the page cache.
+Document* currentDocument = m_frame->document();
+stopLoading(currentDocument && !currentDocument->inPageCache() ? UnloadEventPolicyUnloadAndPageHide : UnloadEventPolicyUnloadOnly);
+m_frame->editor()->clearUndoRedoOperations();
+return true;
+}
+KURL FrameLoader::iconURL()
+{
+// If this isn't a top level frame, return nothing
+if (m_frame->tree() && m_frame->tree()->parent())
+return KURL();
+// If we have an iconURL from a Link element, return that
+if (!m_frame->document()->iconURL().isEmpty())
+return KURL(ParsedURLString, m_frame->document()->iconURL());
+// Don't return a favicon iconURL unless we're http or https
+if (!m_URL.protocolInHTTPFamily())
+return KURL();
+KURL url;
+bool couldSetProtocol = url.setProtocol(m_URL.protocol());
+ASSERT_UNUSED(couldSetProtocol, couldSetProtocol);
+url.setHost(m_URL.host());
+if (m_URL.hasPort())
+url.setPort(m_URL.port());
+url.setPath("/favicon.ico");
+return url;
+}
+bool FrameLoader::didOpenURL(const KURL& url)
+{
+if (m_frame->redirectScheduler()->redirectScheduledDuringLoad()) {
+// A redirect was scheduled before the document was created.
+// This can happen when one frame changes another frame's location.
+return false;
+}
+m_frame->redirectScheduler()->cancel();
+m_frame->editor()->clearLastEditCommand();
+m_isComplete = false;
+m_isLoadingMainResource = true;
+m_didCallImplicitClose = false;
+// If we are still in the process of initializing an empty document then
+// its frame is not in a consistent state for rendering, so avoid setJSStatusBarText
+// since it may cause clients to attempt to render the frame.
+if (!m_stateMachine.creatingInitialEmptyDocument()) {
+if (DOMWindow* window = m_frame->existingDOMWindow()) {
+window->setStatus(String());
+window->setDefaultStatus(String());
+}
+}
+m_URL = url;
+if (m_URL.protocolInHTTPFamily() && !m_URL.host().isEmpty() && m_URL.path().isEmpty())
+m_URL.setPath("/");
+m_workingURL = m_URL;
+started();
+return true;
+}
+void FrameLoader::didExplicitOpen()
+{
+m_isComplete = false;
+m_didCallImplicitClose = false;
+// Calling document.open counts as committing the first real document load.
+if (!m_stateMachine.committedFirstRealDocumentLoad())
+m_stateMachine.advanceTo(FrameLoaderStateMachine::DisplayingInitialEmptyDocumentPostCommit);
+// Prevent window.open(url) -- eg window.open("about:blank") -- from blowing away results
+// from a subsequent window.document.open / window.document.write call.
+// Canceling redirection here works for all cases because document.open
+// implicitly precedes document.write.
+m_frame->redirectScheduler()->cancel();
+if (m_frame->document()->url() != blankURL())
+m_URL = m_frame->document()->url();
+}
+void FrameLoader::cancelAndClear()
+{
+m_frame->redirectScheduler()->cancel();
+if (!m_isComplete)
+closeURL();
+clear(false);
+m_frame->script()->updatePlatformScriptObjects();
+}
+void FrameLoader::clear(bool clearWindowProperties, bool clearScriptObjects, bool clearFrameView)
+{
+m_frame->editor()->clear();
+if (!m_needsClear)
+return;
+m_needsClear = false;
+if (!m_frame->document()->inPageCache()) {
+m_frame->document()->cancelParsing();
+m_frame->document()->stopActiveDOMObjects();
+if (m_frame->document()->attached()) {
+m_frame->document()->willRemove();
+m_frame->document()->detach();
+m_frame->document()->removeFocusedNodeOfSubtree(m_frame->document());
+}
+}
+// Do this after detaching the document so that the unload event works.
+if (clearWindowProperties) {
+m_frame->clearDOMWindow();
+m_frame->script()->clearWindowShell(m_frame->document()->inPageCache());
+}
+m_frame->selection()->clear();
+m_frame->eventHandler()->clear();
+if (clearFrameView && m_frame->view())
+m_frame->view()->clear();
+// Do not drop the document before the ScriptController and view are cleared
+// as some destructors might still try to access the document.
+m_frame->setDocument(0);
+writer()->clear();
+m_subframeLoader.clear();
+if (clearScriptObjects)
+m_frame->script()->clearScriptObjects();
+m_frame->redirectScheduler()->clear();
+m_checkTimer.stop();
+m_shouldCallCheckCompleted = false;
+m_shouldCallCheckLoadComplete = false;
+if (m_stateMachine.isDisplayingInitialEmptyDocument() && m_stateMachine.committedFirstRealDocumentLoad())
+m_stateMachine.advanceTo(FrameLoaderStateMachine::CommittedFirstRealLoad);
+}
+void FrameLoader::receivedFirstData()
+{
+writer()->begin(m_workingURL, false);
+dispatchDidCommitLoad();
+dispatchDidClearWindowObjectsInAllWorlds();
+if (m_documentLoader) {
+String ptitle = m_documentLoader->title();
+// If we have a title let the WebView know about it.
+if (!ptitle.isNull())
+m_client->dispatchDidReceiveTitle(ptitle);
+}
+m_workingURL = KURL();
+double delay;
+String url;
+if (!m_documentLoader)
+return;
+if (m_frame->inViewSourceMode())
+return;
+if (!parseHTTPRefresh(m_documentLoader->response().httpHeaderField("Refresh"), false, delay, url))
+return;
+if (url.isEmpty())
+url = m_URL.string();
+else
+url = m_frame->document()->completeURL(url).string();
+m_frame->redirectScheduler()->scheduleRedirect(delay, url);
+}
+void FrameLoader::setURL(const KURL& url)
+{
+KURL ref(url);
+ref.setUser(String());
+ref.setPass(String());
+ref.removeFragmentIdentifier();
+m_outgoingReferrer = ref.string();
+m_URL = url;
+}
+void FrameLoader::didBeginDocument(bool dispatch)
+{
+m_needsClear = true;
+m_isComplete = false;
+m_didCallImplicitClose = false;
+m_isLoadingMainResource = true;
+if (m_pendingStateObject) {
+m_frame->document()->statePopped(m_pendingStateObject.get());
+m_pendingStateObject.clear();
+}
+if (dispatch)
+dispatchDidClearWindowObjectsInAllWorlds();
+updateFirstPartyForCookies();
+Settings* settings = m_frame->document()->settings();
+m_frame->document()->docLoader()->setAutoLoadImages(settings && settings->loadsImagesAutomatically());
+if (m_documentLoader) {
+String dnsPrefetchControl = m_documentLoader->response().httpHeaderField("X-DNS-Prefetch-Control");
+if (!dnsPrefetchControl.isEmpty())
+m_frame->document()->parseDNSPrefetchControlHeader(dnsPrefetchControl);
+}
+history()->restoreDocumentState();
+}
+void FrameLoader::didEndDocument()
+{
+m_isLoadingMainResource = false;
+}
+void FrameLoader::iconLoadDecisionAvailable()
+{
+if (!m_mayLoadIconLater)
+return;
+LOG(IconDatabase, "FrameLoader %p was told a load decision is available for its icon", this);
+startIconLoader();
+m_mayLoadIconLater = false;
+}
+void FrameLoader::startIconLoader()
+{
+// FIXME: We kick off the icon loader when the frame is done receiving its main resource.
+// But we should instead do it when we're done parsing the head element.
+if (!isLoadingMainFrame())
+return;
+if (!iconDatabase() || !iconDatabase()->isEnabled())
+return;
+KURL url(iconURL());
+String urlString(url.string());
+if (urlString.isEmpty())
+return;
+// If we're not reloading and the icon database doesn't say to load now then bail before we actually start the load
+if (loadType() != FrameLoadTypeReload && loadType() != FrameLoadTypeReloadFromOrigin) {
+IconLoadDecision decision = iconDatabase()->loadDecisionForIconURL(urlString, m_documentLoader.get());
+if (decision == IconLoadNo) {
+LOG(IconDatabase, "FrameLoader::startIconLoader() - Told not to load this icon, committing iconURL %s to database for pageURL mapping", urlString.ascii().data());
+commitIconURLToIconDatabase(url);
+// We were told not to load this icon - that means this icon is already known by the database
+// If the icon data hasn't been read in from disk yet, kick off the read of the icon from the database to make sure someone
+// has done it.  This is after registering for the notification so the WebView can call the appropriate delegate method.
+// Otherwise if the icon data *is* available, notify the delegate
+if (!iconDatabase()->iconDataKnownForIconURL(urlString)) {
+LOG(IconDatabase, "Told not to load icon %s but icon data is not yet available - registering for notification and requesting load from disk", urlString.ascii().data());
+m_client->registerForIconNotification();
+iconDatabase()->iconForPageURL(m_URL.string(), IntSize(0, 0));
+iconDatabase()->iconForPageURL(originalRequestURL().string(), IntSize(0, 0));
+} else
+m_client->dispatchDidReceiveIcon();
+return;
+}
+if (decision == IconLoadUnknown) {
+// In this case, we may end up loading the icon later, but we still want to commit the icon url mapping to the database
+// just in case we don't end up loading later - if we commit the mapping a second time after the load, that's no big deal
+// We also tell the client to register for the notification that the icon is received now so it isn't missed in case the
+// icon is later read in from disk
+LOG(IconDatabase, "FrameLoader %p might load icon %s later", this, urlString.ascii().data());
+m_mayLoadIconLater = true;
+m_client->registerForIconNotification();
+commitIconURLToIconDatabase(url);
+return;
+}
+}
+// People who want to avoid loading images generally want to avoid loading all images.
+// Now that we've accounted for URL mapping, avoid starting the network load if images aren't set to display automatically.
+Settings* settings = m_frame->settings();
+if (settings && !settings->loadsImagesAutomatically())
+return;
+// This is either a reload or the icon database said "yes, load the icon", so kick off the load!
+if (!m_iconLoader)
+m_iconLoader = IconLoader::create(m_frame);
+m_iconLoader->startLoading();
+}
+void FrameLoader::commitIconURLToIconDatabase(const KURL& icon)
+{
+ASSERT(iconDatabase());
+LOG(IconDatabase, "Committing iconURL %s to database for pageURLs %s and %s", icon.string().ascii().data(), m_URL.string().ascii().data(), originalRequestURL().string().ascii().data());
+iconDatabase()->setIconURLForPageURL(icon.string(), m_URL.string());
+iconDatabase()->setIconURLForPageURL(icon.string(), originalRequestURL().string());
+}
+void FrameLoader::finishedParsing()
+{
+if (m_stateMachine.creatingInitialEmptyDocument())
+return;
+m_frame->injectUserScripts(InjectAtDocumentEnd);
+// This can be called from the Frame's destructor, in which case we shouldn't protect ourselves
+// because doing so will cause us to re-enter the destructor when protector goes out of scope.
+// Null-checking the FrameView indicates whether or not we're in the destructor.
+RefPtr<Frame> protector = m_frame->view() ? m_frame : 0;
+m_client->dispatchDidFinishDocumentLoad();
+checkCompleted();
+if (!m_frame->view())
+return; // We are being destroyed by something checkCompleted called.
+// Check if the scrollbars are really needed for the content.
+// If not, remove them, relayout, and repaint.
+m_frame->view()->restoreScrollbar();
+m_frame->view()->scrollToFragment(m_URL);
+}
+void FrameLoader::loadDone()
+{
+checkCompleted();
+}
+bool FrameLoader::allChildrenAreComplete() const
+{
+for (Frame* child = m_frame->tree()->firstChild(); child; child = child->tree()->nextSibling()) {
+if (!child->loader()->m_isComplete)
+return false;
+}
+return true;
+}
+bool FrameLoader::allAncestorsAreComplete() const
+{
+for (Frame* ancestor = m_frame; ancestor; ancestor = ancestor->tree()->parent()) {
+if (!ancestor->loader()->m_isComplete)
+return false;
+}
+return true;
+}
+void FrameLoader::checkCompleted()
+{
+m_shouldCallCheckCompleted = false;
+if (m_frame->view())
+m_frame->view()->checkStopDelayingDeferredRepaints();
+// Any frame that hasn't completed yet?
+if (!allChildrenAreComplete())
+return;
+// Have we completed before?
+if (m_isComplete)
+return;
+// Are we still parsing?
+if (m_frame->document()->parsing())
+return;
+// Still waiting for images/scripts?
+if (numRequests(m_frame->document()))
+return;
+// OK, completed.
+m_isComplete = true;
+RefPtr<Frame> protect(m_frame);
+checkCallImplicitClose(); // if we didn't do it before
+m_frame->redirectScheduler()->startTimer();
+completed();
+if (m_frame->page())
+checkLoadComplete();
+}
+void FrameLoader::checkTimerFired(Timer<FrameLoader>*)
+{
+if (Page* page = m_frame->page()) {
+if (page->defersLoading())
+return;
+}
+if (m_shouldCallCheckCompleted)
+checkCompleted();
+if (m_shouldCallCheckLoadComplete)
+checkLoadComplete();
+}
+void FrameLoader::startCheckCompleteTimer()
+{
+if (!(m_shouldCallCheckCompleted || m_shouldCallCheckLoadComplete))
+return;
+if (m_checkTimer.isActive())
+return;
+m_checkTimer.startOneShot(0);
+}
+void FrameLoader::scheduleCheckCompleted()
+{
+m_shouldCallCheckCompleted = true;
+startCheckCompleteTimer();
+}
+void FrameLoader::scheduleCheckLoadComplete()
+{
+m_shouldCallCheckLoadComplete = true;
+startCheckCompleteTimer();
+}
+void FrameLoader::checkCallImplicitClose()
+{
+if (m_didCallImplicitClose || m_frame->document()->parsing())
+return;
+if (!allChildrenAreComplete())
+return; // still got a frame running -> too early
+m_didCallImplicitClose = true;
+m_wasUnloadEventEmitted = false;
+m_frame->document()->implicitClose();
+}
+KURL FrameLoader::baseURL() const
+{
+ASSERT(m_frame->document());
+return m_frame->document()->baseURL();
+}
+KURL FrameLoader::completeURL(const String& url)
+{
+ASSERT(m_frame->document());
+return m_frame->document()->completeURL(url);
+}
+void FrameLoader::loadURLIntoChildFrame(const KURL& url, const String& referer, Frame* childFrame)
+{
+ASSERT(childFrame);
+HistoryItem* parentItem = history()->currentItem();
+FrameLoadType loadType = this->loadType();
+FrameLoadType childLoadType = FrameLoadTypeRedirectWithLockedBackForwardList;
+KURL workingURL = url;
+// If we're moving in the back/forward list, we might want to replace the content
+// of this child frame with whatever was there at that point.
+if (parentItem && parentItem->children().size() && isBackForwardLoadType(loadType)) {
+HistoryItem* childItem = parentItem->childItemWithTarget(childFrame->tree()->name());
+if (childItem) {
+// Use the original URL to ensure we get all the side-effects, such as
+// onLoad handlers, of any redirects that happened. An example of where
+// this is needed is Radar 3213556.
+workingURL = KURL(ParsedURLString, childItem->originalURLString());
+childLoadType = loadType;
+childFrame->loader()->history()->setProvisionalItem(childItem);
+}
+}
+RefPtr<Archive> subframeArchive = activeDocumentLoader()->popArchiveForSubframe(childFrame->tree()->name());
+if (subframeArchive)
+childFrame->loader()->loadArchive(subframeArchive.release());
+else
+childFrame->loader()->loadURL(workingURL, referer, String(), false, childLoadType, 0, 0);
+}
+void FrameLoader::loadArchive(PassRefPtr<Archive> prpArchive)
+{
+RefPtr<Archive> archive = prpArchive;
+ArchiveResource* mainResource = archive->mainResource();
+ASSERT(mainResource);
+if (!mainResource)
+return;
+SubstituteData substituteData(mainResource->data(), mainResource->mimeType(), mainResource->textEncoding(), KURL());
+ResourceRequest request(mainResource->url());
+#if PLATFORM(MAC)
+request.applyWebArchiveHackForMail();
+#endif
+RefPtr<DocumentLoader> documentLoader = m_client->createDocumentLoader(request, substituteData);
+documentLoader->addAllArchiveResources(archive.get());
+load(documentLoader.get());
+}
+ObjectContentType FrameLoader::defaultObjectContentType(const KURL& url, const String& mimeTypeIn)
+{
+String mimeType = mimeTypeIn;
+// We don't use MIMETypeRegistry::getMIMETypeForPath() because it returns "application/octet-stream" upon failure
+if (mimeType.isEmpty())
+mimeType = MIMETypeRegistry::getMIMETypeForExtension(url.path().substring(url.path().reverseFind('.') + 1));
+if (mimeType.isEmpty())
+return ObjectContentFrame; // Go ahead and hope that we can display the content.
+if (MIMETypeRegistry::isSupportedImageMIMEType(mimeType))
+return WebCore::ObjectContentImage;
+#if !PLATFORM(MAC) && !PLATFORM(CHROMIUM) && !PLATFORM(EFL) // Mac has no PluginDatabase, nor does Chromium or EFL
+if (PluginDatabase::installedPlugins()->isMIMETypeRegistered(mimeType))
+return WebCore::ObjectContentNetscapePlugin;
+#endif
+if (MIMETypeRegistry::isSupportedNonImageMIMEType(mimeType))
+return WebCore::ObjectContentFrame;
+return WebCore::ObjectContentNone;
+}
+String FrameLoader::outgoingReferrer() const
+{
+return m_outgoingReferrer;
+}
+String FrameLoader::outgoingOrigin() const
+{
+return m_frame->document()->securityOrigin()->toString();
+}
+bool FrameLoader::isMixedContent(SecurityOrigin* context, const KURL& url)
+{
+if (context->protocol() != "https")
+return false;  // We only care about HTTPS security origins.
+if (!url.isValid() || SchemeRegistry::shouldTreatURLSchemeAsSecure(url.protocol()))
+return false;  // Loading these protocols is secure.
+return true;
+}
+void FrameLoader::checkIfDisplayInsecureContent(SecurityOrigin* context, const KURL& url)
+{
+if (!isMixedContent(context, url))
+return;
+String message = String::format("The page at %s displayed insecure content from %s.\n",
+m_URL.string().utf8().data(), url.string().utf8().data());
+m_frame->domWindow()->console()->addMessage(HTMLMessageSource, LogMessageType, WarningMessageLevel, message, 1, String());
+m_client->didDisplayInsecureContent();
+}
+void FrameLoader::checkIfRunInsecureContent(SecurityOrigin* context, const KURL& url)
+{
+if (!isMixedContent(context, url))
+return;
+String message = String::format("The page at %s ran insecure content from %s.\n",
+m_URL.string().utf8().data(), url.string().utf8().data());
+m_frame->domWindow()->console()->addMessage(HTMLMessageSource, LogMessageType, WarningMessageLevel, message, 1, String());
+m_client->didRunInsecureContent(context);
+}
+Frame* FrameLoader::opener()
+{
+return m_opener;
+}
+void FrameLoader::setOpener(Frame* opener)
+{
+if (m_opener)
+m_opener->loader()->m_openedFrames.remove(m_frame);
+if (opener)
+opener->loader()->m_openedFrames.add(m_frame);
+m_opener = opener;
+if (m_frame->document()) {
+m_frame->document()->initSecurityContext();
+m_frame->domWindow()->setSecurityOrigin(m_frame->document()->securityOrigin());
+}
+}
+void FrameLoader::handleFallbackContent()
+{
+HTMLFrameOwnerElement* owner = m_frame->ownerElement();
+if (!owner || !owner->hasTagName(objectTag))
+return;
+static_cast<HTMLObjectElement*>(owner)->renderFallbackContent();
+}
+void FrameLoader::provisionalLoadStarted()
+{
+if (m_stateMachine.firstLayoutDone())
+m_stateMachine.advanceTo(FrameLoaderStateMachine::CommittedFirstRealLoad);
+m_frame->redirectScheduler()->cancel(true);
+m_client->provisionalLoadStarted();
+}
+bool FrameLoader::isProcessingUserGesture()
+{
+Frame* frame = m_frame->tree()->top();
+if (!frame->script()->canExecuteScripts(NotAboutToExecuteScript))
+return true; // If JavaScript is disabled, a user gesture must have initiated the navigation.
+return frame->script()->processingUserGesture(mainThreadNormalWorld()); // FIXME: Use pageIsProcessingUserGesture.
+}
+void FrameLoader::resetMultipleFormSubmissionProtection()
+{
+m_submittedFormURL = KURL();
+}
+void FrameLoader::willSetEncoding()
+{
+if (!m_workingURL.isEmpty())
+receivedFirstData();
+}
+void FrameLoader::addData(const char* bytes, int length)
+{
+ASSERT(m_workingURL.isEmpty());
+ASSERT(m_frame->document());
+ASSERT(m_frame->document()->parsing());
+writer()->addData(bytes, length);
+}
+#if ENABLE(WML)
+static inline bool frameContainsWMLContent(Frame* frame)
+{
+Document* document = frame ? frame->document() : 0;
+if (!document)
+return false;
+return document->containsWMLContent() || document->isWMLDocument();
+}
+#endif
+void FrameLoader::updateFirstPartyForCookies()
+{
+if (m_frame->tree()->parent())
+setFirstPartyForCookies(m_frame->tree()->parent()->document()->firstPartyForCookies());
+else
+setFirstPartyForCookies(m_URL);
+}
+void FrameLoader::setFirstPartyForCookies(const KURL& url)
+{
+m_frame->document()->setFirstPartyForCookies(url);
+for (Frame* child = m_frame->tree()->firstChild(); child; child = child->tree()->nextSibling())
+child->loader()->setFirstPartyForCookies(url);
+}
+// This does the same kind of work that didOpenURL does, except it relies on the fact
+// that a higher level already checked that the URLs match and the scrolling is the right thing to do.
+void FrameLoader::loadInSameDocument(const KURL& url, SerializedScriptValue* stateObject, bool isNewNavigation)
+{
+// If we have a state object, we cannot also be a new navigation.
+ASSERT(!stateObject || (stateObject && !isNewNavigation));
+// Update the data source's request with the new URL to fake the URL change
+m_frame->document()->setURL(url);
+documentLoader()->replaceRequestURLForSameDocumentNavigation(url);
+if (isNewNavigation && !shouldTreatURLAsSameAsCurrent(url) && !stateObject) {
+// NB: must happen after replaceRequestURLForSameDocumentNavigation(), since we add
+// based on the current request. Must also happen before we openURL and displace the
+// scroll position, since adding the BF item will save away scroll state.
+// NB2:  If we were loading a long, slow doc, and the user anchor nav'ed before
+// it was done, currItem is now set the that slow doc, and prevItem is whatever was
+// before it.  Adding the b/f item will bump the slow doc down to prevItem, even
+// though its load is not yet done.  I think this all works out OK, for one because
+// we have already saved away the scroll and doc state for the long slow load,
+// but it's not an obvious case.
+history()->updateBackForwardListForFragmentScroll();
+}
+String oldURL;
+bool hashChange = equalIgnoringFragmentIdentifier(url, m_URL) && url.fragmentIdentifier() != m_URL.fragmentIdentifier();
+oldURL = m_URL;
+m_URL = url;
+history()->updateForSameDocumentNavigation();
+// If we were in the autoscroll/panScroll mode we want to stop it before following the link to the anchor
+if (hashChange)
+m_frame->eventHandler()->stopAutoscrollTimer();
+// It's important to model this as a load that starts and immediately finishes.
+// Otherwise, the parent frame may think we never finished loading.
+started();
+// We need to scroll to the fragment whether or not a hash change occurred, since
+// the user might have scrolled since the previous navigation.
+if (FrameView* view = m_frame->view())
+view->scrollToFragment(m_URL);
+m_isComplete = false;
+checkCompleted();
+if (isNewNavigation) {
+// This will clear previousItem from the rest of the frame tree that didn't
+// doing any loading. We need to make a pass on this now, since for anchor nav
+// we'll not go through a real load and reach Completed state.
+checkLoadComplete();
+}
+m_client->dispatchDidNavigateWithinPage();
+if (stateObject) {
+m_frame->document()->statePopped(stateObject);
+m_client->dispatchDidPopStateWithinPage();
+}
+if (hashChange) {
+m_frame->document()->enqueueHashchangeEvent(oldURL, url);
+m_client->dispatchDidChangeLocationWithinPage();
+}
+// FrameLoaderClient::didFinishLoad() tells the internal load delegate the load finished with no error
+m_client->didFinishLoad();
+}
+bool FrameLoader::isComplete() const
+{
+return m_isComplete;
+}
+void FrameLoader::completed()
+{
+RefPtr<Frame> protect(m_frame);
+for (Frame* descendant = m_frame->tree()->traverseNext(m_frame); descendant; descendant = descendant->tree()->traverseNext(m_frame))
+descendant->redirectScheduler()->startTimer();
+if (Frame* parent = m_frame->tree()->parent())
+parent->loader()->checkCompleted();
+if (m_frame->view())
+m_frame->view()->maintainScrollPositionAtAnchor(0);
+}
+void FrameLoader::started()
+{
+for (Frame* frame = m_frame; frame; frame = frame->tree()->parent())
+frame->loader()->m_isComplete = false;
+}
+void FrameLoader::prepareForLoadStart()
+{
+if (Page* page = m_frame->page())
+page->progress()->progressStarted(m_frame);
+m_client->dispatchDidStartProvisionalLoad();
+}
+void FrameLoader::setupForReplace()
+{
+setState(FrameStateProvisional);
+m_provisionalDocumentLoader = m_documentLoader;
+m_documentLoader = 0;
+detachChildren();
+}
+void FrameLoader::setupForReplaceByMIMEType(const String& newMIMEType)
+{
+activeDocumentLoader()->setupForReplaceByMIMEType(newMIMEType);
+}
+// This is a hack to allow keep navigation to http/https feeds working. To remove this
+// we need to introduce new API akin to registerURLSchemeAsLocal, that registers a
+// protocols navigation policy.
+static bool isFeedWithNestedProtocolInHTTPFamily(const KURL& url)
+{
+const String& urlString = url.string();
+if (!urlString.startsWith("feed", false))
+return false;
+return urlString.startsWith("feed://", false)
+|| urlString.startsWith("feed:http:", false) || urlString.startsWith("feed:https:", false)
+|| urlString.startsWith("feeds:http:", false) || urlString.startsWith("feeds:https:", false)
+|| urlString.startsWith("feedsearch:http:", false) || urlString.startsWith("feedsearch:https:", false);
+}
+void FrameLoader::loadFrameRequest(const FrameLoadRequest& request, bool lockHistory, bool lockBackForwardList,
+PassRefPtr<Event> event, PassRefPtr<FormState> formState, ReferrerPolicy referrerPolicy)
+{
+KURL url = request.resourceRequest().url();
+String referrer;
+String argsReferrer = request.resourceRequest().httpReferrer();
+if (!argsReferrer.isEmpty())
+referrer = argsReferrer;
+else
+referrer = m_outgoingReferrer;
+ASSERT(frame()->document());
+if (SchemeRegistry::shouldTreatURLAsLocal(url.string()) && !isFeedWithNestedProtocolInHTTPFamily(url)) {
+if (!SecurityOrigin::canLoad(url, String(), frame()->document()) && !SecurityOrigin::canLoad(url, referrer, 0)) {
+FrameLoader::reportLocalLoadFailed(m_frame, url.string());
+return;
+}
+}
+if (SecurityOrigin::shouldHideReferrer(url, referrer) || referrerPolicy == NoReferrer)
+referrer = String();
+FrameLoadType loadType;
+if (request.resourceRequest().cachePolicy() == ReloadIgnoringCacheData)
+loadType = FrameLoadTypeReload;
+else if (lockBackForwardList)
+loadType = FrameLoadTypeRedirectWithLockedBackForwardList;
+else
+loadType = FrameLoadTypeStandard;
+if (request.resourceRequest().httpMethod() == "POST")
+loadPostRequest(request.resourceRequest(), referrer, request.frameName(), lockHistory, loadType, event, formState.get());
+else
+loadURL(request.resourceRequest().url(), referrer, request.frameName(), lockHistory, loadType, event, formState.get());
+// FIXME: It's possible this targetFrame will not be the same frame that was targeted by the actual
+// load if frame names have changed.
+Frame* sourceFrame = formState ? formState->sourceFrame() : m_frame;
+Frame* targetFrame = sourceFrame->loader()->findFrameForNavigation(request.frameName());
+if (targetFrame && targetFrame != sourceFrame) {
+if (Page* page = targetFrame->page())
+page->chrome()->focus();
+}
+}
+void FrameLoader::loadURL(const KURL& newURL, const String& referrer, const String& frameName, bool lockHistory, FrameLoadType newLoadType,
+PassRefPtr<Event> event, PassRefPtr<FormState> prpFormState)
+{
+RefPtr<FormState> formState = prpFormState;
+bool isFormSubmission = formState;
+ResourceRequest request(newURL);
+if (!referrer.isEmpty()) {
+request.setHTTPReferrer(referrer);
+RefPtr<SecurityOrigin> referrerOrigin = SecurityOrigin::createFromString(referrer);
+addHTTPOriginIfNeeded(request, referrerOrigin->toString());
+}
+addExtraFieldsToRequest(request, newLoadType, true, event || isFormSubmission);
+if (newLoadType == FrameLoadTypeReload || newLoadType == FrameLoadTypeReloadFromOrigin)
+request.setCachePolicy(ReloadIgnoringCacheData);
+ASSERT(newLoadType != FrameLoadTypeSame);
+// The search for a target frame is done earlier in the case of form submission.
+Frame* targetFrame = isFormSubmission ? 0 : findFrameForNavigation(frameName);
+if (targetFrame && targetFrame != m_frame) {
+targetFrame->loader()->loadURL(newURL, referrer, String(), lockHistory, newLoadType, event, formState.release());
+return;
+}
+if (m_pageDismissalEventBeingDispatched)
+return;
+NavigationAction action(newURL, newLoadType, isFormSubmission, event);
+if (!targetFrame && !frameName.isEmpty()) {
+policyChecker()->checkNewWindowPolicy(action, FrameLoader::callContinueLoadAfterNewWindowPolicy,
+request, formState.release(), frameName, this);
+return;
+}
+RefPtr<DocumentLoader> oldDocumentLoader = m_documentLoader;
+bool sameURL = shouldTreatURLAsSameAsCurrent(newURL);
+// Make sure to do scroll to anchor processing even if the URL is
+// exactly the same so pages with '#' links and DHTML side effects
+// work properly.
+if (shouldScrollToAnchor(isFormSubmission, newLoadType, newURL)) {
+oldDocumentLoader->setTriggeringAction(action);
+policyChecker()->stopCheck();
+policyChecker()->setLoadType(newLoadType);
+policyChecker()->checkNavigationPolicy(request, oldDocumentLoader.get(), formState.release(),
+callContinueFragmentScrollAfterNavigationPolicy, this);
+} else {
+// must grab this now, since this load may stop the previous load and clear this flag
+bool isRedirect = m_quickRedirectComing;
+loadWithNavigationAction(request, action, lockHistory, newLoadType, formState.release());
+if (isRedirect) {
+m_quickRedirectComing = false;
+if (m_provisionalDocumentLoader)
+m_provisionalDocumentLoader->setIsClientRedirect(true);
+} else if (sameURL)
+// Example of this case are sites that reload the same URL with a different cookie
+// driving the generated content, or a master frame with links that drive a target
+// frame, where the user has clicked on the same link repeatedly.
+m_loadType = FrameLoadTypeSame;
+}
+}
+void FrameLoader::load(const ResourceRequest& request, bool lockHistory)
+{
+load(request, SubstituteData(), lockHistory);
+}
+void FrameLoader::load(const ResourceRequest& request, const SubstituteData& substituteData, bool lockHistory)
+{
+if (m_inStopAllLoaders)
+return;
+// FIXME: is this the right place to reset loadType? Perhaps this should be done after loading is finished or aborted.
+m_loadType = FrameLoadTypeStandard;
+RefPtr<DocumentLoader> loader = m_client->createDocumentLoader(request, substituteData);
+if (lockHistory && m_documentLoader)
+loader->setClientRedirectSourceForHistory(m_documentLoader->didCreateGlobalHistoryEntry() ? m_documentLoader->urlForHistory() : m_documentLoader->clientRedirectSourceForHistory());
+load(loader.get());
+}
+void FrameLoader::load(const ResourceRequest& request, const String& frameName, bool lockHistory)
+{
+if (frameName.isEmpty()) {
+load(request, lockHistory);
+return;
+}
+Frame* frame = findFrameForNavigation(frameName);
+if (frame) {
+frame->loader()->load(request, lockHistory);
+return;
+}
+policyChecker()->checkNewWindowPolicy(NavigationAction(request.url(), NavigationTypeOther), FrameLoader::callContinueLoadAfterNewWindowPolicy, request, 0, frameName, this);
+}
+void FrameLoader::loadWithNavigationAction(const ResourceRequest& request, const NavigationAction& action, bool lockHistory, FrameLoadType type, PassRefPtr<FormState> formState)
+{
+RefPtr<DocumentLoader> loader = m_client->createDocumentLoader(request, SubstituteData());
+if (lockHistory && m_documentLoader)
+loader->setClientRedirectSourceForHistory(m_documentLoader->didCreateGlobalHistoryEntry() ? m_documentLoader->urlForHistory() : m_documentLoader->clientRedirectSourceForHistory());
+loader->setTriggeringAction(action);
+if (m_documentLoader)
+loader->setOverrideEncoding(m_documentLoader->overrideEncoding());
+loadWithDocumentLoader(loader.get(), type, formState);
+}
+void FrameLoader::load(DocumentLoader* newDocumentLoader)
+{
+ResourceRequest& r = newDocumentLoader->request();
+addExtraFieldsToMainResourceRequest(r);
+FrameLoadType type;
+if (shouldTreatURLAsSameAsCurrent(newDocumentLoader->originalRequest().url())) {
+r.setCachePolicy(ReloadIgnoringCacheData);
+type = FrameLoadTypeSame;
+} else
+type = FrameLoadTypeStandard;
+if (m_documentLoader)
+newDocumentLoader->setOverrideEncoding(m_documentLoader->overrideEncoding());
+// When we loading alternate content for an unreachable URL that we're
+// visiting in the history list, we treat it as a reload so the history list
+// is appropriately maintained.
+//
+// FIXME: This seems like a dangerous overloading of the meaning of "FrameLoadTypeReload" ...
+// shouldn't a more explicit type of reload be defined, that means roughly
+// "load without affecting history" ?
+if (shouldReloadToHandleUnreachableURL(newDocumentLoader)) {
+ASSERT(type == FrameLoadTypeStandard);
+type = FrameLoadTypeReload;
+}
+loadWithDocumentLoader(newDocumentLoader, type, 0);
+}
+void FrameLoader::loadWithDocumentLoader(DocumentLoader* loader, FrameLoadType type, PassRefPtr<FormState> prpFormState)
+{
+ASSERT(m_client->hasWebView());
+// Unfortunately the view must be non-nil, this is ultimately due
+// to parser requiring a FrameView.  We should fix this dependency.
+ASSERT(m_frame->view());
+if (m_pageDismissalEventBeingDispatched)
+return;
+policyChecker()->setLoadType(type);
+RefPtr<FormState> formState = prpFormState;
+bool isFormSubmission = formState;
+const KURL& newURL = loader->request().url();
+if (shouldScrollToAnchor(isFormSubmission, policyChecker()->loadType(), newURL)) {
+RefPtr<DocumentLoader> oldDocumentLoader = m_documentLoader;
+NavigationAction action(newURL, policyChecker()->loadType(), isFormSubmission);
+oldDocumentLoader->setTriggeringAction(action);
+policyChecker()->stopCheck();
+policyChecker()->checkNavigationPolicy(loader->request(), oldDocumentLoader.get(), formState,
+callContinueFragmentScrollAfterNavigationPolicy, this);
+} else {
+if (Frame* parent = m_frame->tree()->parent())
+loader->setOverrideEncoding(parent->loader()->documentLoader()->overrideEncoding());
+policyChecker()->stopCheck();
+setPolicyDocumentLoader(loader);
+if (loader->triggeringAction().isEmpty())
+loader->setTriggeringAction(NavigationAction(newURL, policyChecker()->loadType(), isFormSubmission));
+if (Element* ownerElement = m_frame->document()->ownerElement()) {
+if (!ownerElement->dispatchBeforeLoadEvent(loader->request().url().string())) {
+continueLoadAfterNavigationPolicy(loader->request(), formState, false);
+return;
+}
+}
+policyChecker()->checkNavigationPolicy(loader->request(), loader, formState,
+callContinueLoadAfterNavigationPolicy, this);
+}
+}
+void FrameLoader::reportLocalLoadFailed(Frame* frame, const String& url)
+{
+ASSERT(!url.isEmpty());
+if (!frame)
+return;
+frame->domWindow()->console()->addMessage(JSMessageSource, LogMessageType, ErrorMessageLevel, "Not allowed to load local resource: " + url, 0, String());
+}
+const ResourceRequest& FrameLoader::initialRequest() const
+{
+return activeDocumentLoader()->originalRequest();
+}
+void FrameLoader::receivedData(const char* data, int length)
+{
+activeDocumentLoader()->receivedData(data, length);
+}
+bool FrameLoader::willLoadMediaElementURL(KURL& url)
+{
+ResourceRequest request(url);
+unsigned long identifier;
+ResourceError error;
+requestFromDelegate(request, identifier, error);
+notifier()->sendRemainingDelegateMessages(m_documentLoader.get(), identifier, ResourceResponse(url, String(), -1, String(), String()), -1, error);
+url = request.url();
+return error.isNull();
+}
+ResourceError FrameLoader::interruptionForPolicyChangeError(const ResourceRequest& request)
+{
+return m_client->interruptForPolicyChangeError(request);
+}
+bool FrameLoader::shouldReloadToHandleUnreachableURL(DocumentLoader* docLoader)
+{
+KURL unreachableURL = docLoader->unreachableURL();
+if (unreachableURL.isEmpty())
+return false;
+if (!isBackForwardLoadType(policyChecker()->loadType()))
+return false;
+// We only treat unreachableURLs specially during the delegate callbacks
+// for provisional load errors and navigation policy decisions. The former
+// case handles well-formed URLs that can't be loaded, and the latter
+// case handles malformed URLs and unknown schemes. Loading alternate content
+// at other times behaves like a standard load.
+DocumentLoader* compareDocumentLoader = 0;
+if (policyChecker()->delegateIsDecidingNavigationPolicy() || policyChecker()->delegateIsHandlingUnimplementablePolicy())
+compareDocumentLoader = m_policyDocumentLoader.get();
+else if (m_delegateIsHandlingProvisionalLoadError)
+compareDocumentLoader = m_provisionalDocumentLoader.get();
+return compareDocumentLoader && unreachableURL == compareDocumentLoader->request().url();
+}
+void FrameLoader::reloadWithOverrideEncoding(const String& encoding)
+{
+if (!m_documentLoader)
+return;
+ResourceRequest request = m_documentLoader->request();
+KURL unreachableURL = m_documentLoader->unreachableURL();
+if (!unreachableURL.isEmpty())
+request.setURL(unreachableURL);
+request.setCachePolicy(ReturnCacheDataElseLoad);
+RefPtr<DocumentLoader> loader = m_client->createDocumentLoader(request, SubstituteData());
+setPolicyDocumentLoader(loader.get());
+loader->setOverrideEncoding(encoding);
+loadWithDocumentLoader(loader.get(), FrameLoadTypeReload, 0);
+}
+void FrameLoader::reload(bool endToEndReload)
+{
+if (!m_documentLoader)
+return;
+// If a window is created by javascript, its main frame can have an empty but non-nil URL.
+// Reloading in this case will lose the current contents (see 4151001).
+if (m_documentLoader->request().url().isEmpty())
+return;
+ResourceRequest initialRequest = m_documentLoader->request();
+// Replace error-page URL with the URL we were trying to reach.
+KURL unreachableURL = m_documentLoader->unreachableURL();
+if (!unreachableURL.isEmpty())
+initialRequest.setURL(unreachableURL);
+// Create a new document loader for the reload, this will become m_documentLoader eventually,
+// but first it has to be the "policy" document loader, and then the "provisional" document loader.
+RefPtr<DocumentLoader> loader = m_client->createDocumentLoader(initialRequest, SubstituteData());
+ResourceRequest& request = loader->request();
+// FIXME: We don't have a mechanism to revalidate the main resource without reloading at the moment.
+request.setCachePolicy(ReloadIgnoringCacheData);
+// If we're about to re-post, set up action so the application can warn the user.
+if (request.httpMethod() == "POST")
+loader->setTriggeringAction(NavigationAction(request.url(), NavigationTypeFormResubmitted));
+loader->setOverrideEncoding(m_documentLoader->overrideEncoding());
+loadWithDocumentLoader(loader.get(), endToEndReload ? FrameLoadTypeReloadFromOrigin : FrameLoadTypeReload, 0);
+}
+static bool canAccessAncestor(const SecurityOrigin* activeSecurityOrigin, Frame* targetFrame)
+{
+// targetFrame can be NULL when we're trying to navigate a top-level frame
+// that has a NULL opener.
+if (!targetFrame)
+return false;
+const bool isLocalActiveOrigin = activeSecurityOrigin->isLocal();
+for (Frame* ancestorFrame = targetFrame; ancestorFrame; ancestorFrame = ancestorFrame->tree()->parent()) {
+Document* ancestorDocument = ancestorFrame->document();
+if (!ancestorDocument)
+return true;
+const SecurityOrigin* ancestorSecurityOrigin = ancestorDocument->securityOrigin();
+if (activeSecurityOrigin->canAccess(ancestorSecurityOrigin))
+return true;
+// Allow file URL descendant navigation even when allowFileAccessFromFileURLs is false.
+if (isLocalActiveOrigin && ancestorSecurityOrigin->isLocal())
+return true;
+}
+return false;
+}
+bool FrameLoader::shouldAllowNavigation(Frame* targetFrame) const
+{
+// The navigation change is safe if the active frame is:
+//   - in the same security origin as the target or one of the target's
+//     ancestors.
+//
+// Or the target frame is:
+//   - a top-level frame in the frame hierarchy and the active frame can
+//     navigate the target frame's opener per above or it is the opener of
+//     the target frame.
+if (!targetFrame)
+return true;
+// Performance optimization.
+if (m_frame == targetFrame)
+return true;
+// Let a frame navigate the top-level window that contains it.  This is
+// important to allow because it lets a site "frame-bust" (escape from a
+// frame created by another web site).
+if (!isDocumentSandboxed(m_frame, SandboxTopNavigation) && targetFrame == m_frame->tree()->top())
+return true;
+// A sandboxed frame can only navigate itself and its descendants.
+if (isDocumentSandboxed(m_frame, SandboxNavigation) && !targetFrame->tree()->isDescendantOf(m_frame))
+return false;
+// Let a frame navigate its opener if the opener is a top-level window.
+if (!targetFrame->tree()->parent() && m_frame->loader()->opener() == targetFrame)
+return true;
+Document* activeDocument = m_frame->document();
+ASSERT(activeDocument);
+const SecurityOrigin* activeSecurityOrigin = activeDocument->securityOrigin();
+// For top-level windows, check the opener.
+if (!targetFrame->tree()->parent() && canAccessAncestor(activeSecurityOrigin, targetFrame->loader()->opener()))
+return true;
+// In general, check the frame's ancestors.
+if (canAccessAncestor(activeSecurityOrigin, targetFrame))
+return true;
+Settings* settings = targetFrame->settings();
+if (settings && !settings->privateBrowsingEnabled()) {
+Document* targetDocument = targetFrame->document();
+// FIXME: this error message should contain more specifics of why the navigation change is not allowed.
+String message = String::format("Unsafe JavaScript attempt to initiate a navigation change for frame with URL %s from frame with URL %s.\n",
+targetDocument->url().string().utf8().data(), activeDocument->url().string().utf8().data());
+// FIXME: should we print to the console of the activeFrame as well?
+targetFrame->domWindow()->console()->addMessage(JSMessageSource, LogMessageType, ErrorMessageLevel, message, 1, String());
+}
+return false;
+}
+void FrameLoader::stopLoadingSubframes()
+{
+for (RefPtr<Frame> child = m_frame->tree()->firstChild(); child; child = child->tree()->nextSibling())
+child->loader()->stopAllLoaders();
+}
+void FrameLoader::stopAllLoaders(DatabasePolicy databasePolicy)
+{
+ASSERT(!m_frame->document() || !m_frame->document()->inPageCache());
+if (m_pageDismissalEventBeingDispatched)
+return;
+// If this method is called from within this method, infinite recursion can occur (3442218). Avoid this.
+if (m_inStopAllLoaders)
+return;
+m_inStopAllLoaders = true;
+policyChecker()->stopCheck();
+stopLoadingSubframes();
+if (m_provisionalDocumentLoader)
+m_provisionalDocumentLoader->stopLoading(databasePolicy);
+if (m_documentLoader)
+m_documentLoader->stopLoading(databasePolicy);
+setProvisionalDocumentLoader(0);
+if (m_documentLoader)
+m_documentLoader->clearArchiveResources();
+m_checkTimer.stop();
+m_inStopAllLoaders = false;
+}
+void FrameLoader::stopForUserCancel(bool deferCheckLoadComplete)
+{
+stopAllLoaders();
+if (deferCheckLoadComplete)
+scheduleCheckLoadComplete();
+else if (m_frame->page())
+checkLoadComplete();
+}
+DocumentLoader* FrameLoader::activeDocumentLoader() const
+{
+if (m_state == FrameStateProvisional)
+return m_provisionalDocumentLoader.get();
+return m_documentLoader.get();
+}
+bool FrameLoader::isLoading() const
+{
+DocumentLoader* docLoader = activeDocumentLoader();
+if (!docLoader)
+return false;
+return docLoader->isLoadingMainResource() || docLoader->isLoadingSubresources() || docLoader->isLoadingPlugIns();
+}
+bool FrameLoader::frameHasLoaded() const
+{
+return m_stateMachine.committedFirstRealDocumentLoad() || (m_provisionalDocumentLoader && !m_stateMachine.creatingInitialEmptyDocument());
+}
+void FrameLoader::setDocumentLoader(DocumentLoader* loader)
+{
+if (!loader && !m_documentLoader)
+return;
+ASSERT(loader != m_documentLoader);
+ASSERT(!loader || loader->frameLoader() == this);
+m_client->prepareForDataSourceReplacement();
+detachChildren();
+if (m_documentLoader)
+m_documentLoader->detachFromFrame();
+m_documentLoader = loader;
+}
+void FrameLoader::setPolicyDocumentLoader(DocumentLoader* loader)
+{
+if (m_policyDocumentLoader == loader)
+return;
+ASSERT(m_frame);
+if (loader)
+loader->setFrame(m_frame);
+if (m_policyDocumentLoader
+&& m_policyDocumentLoader != m_provisionalDocumentLoader
+&& m_policyDocumentLoader != m_documentLoader)
+m_policyDocumentLoader->detachFromFrame();
+m_policyDocumentLoader = loader;
+}
+void FrameLoader::setProvisionalDocumentLoader(DocumentLoader* loader)
+{
+ASSERT(!loader || !m_provisionalDocumentLoader);
+ASSERT(!loader || loader->frameLoader() == this);
+if (m_provisionalDocumentLoader && m_provisionalDocumentLoader != m_documentLoader)
+m_provisionalDocumentLoader->detachFromFrame();
+m_provisionalDocumentLoader = loader;
+}
+double FrameLoader::timeOfLastCompletedLoad()
+{
+return storedTimeOfLastCompletedLoad;
+}
+void FrameLoader::setState(FrameState newState)
+{
+m_state = newState;
+if (newState == FrameStateProvisional)
+provisionalLoadStarted();
+else if (newState == FrameStateComplete) {
+frameLoadCompleted();
+storedTimeOfLastCompletedLoad = currentTime();
+if (m_documentLoader)
+m_documentLoader->stopRecordingResponses();
+}
+}
+void FrameLoader::clearProvisionalLoad()
+{
+setProvisionalDocumentLoader(0);
+if (Page* page = m_frame->page())
+page->progress()->progressCompleted(m_frame);
+setState(FrameStateComplete);
+}
+void FrameLoader::markLoadComplete()
+{
+setState(FrameStateComplete);
+}
+void FrameLoader::commitProvisionalLoad()
+{
+RefPtr<CachedPage> cachedPage = m_loadingFromCachedPage ? pageCache()->get(history()->provisionalItem()) : 0;
+RefPtr<DocumentLoader> pdl = m_provisionalDocumentLoader;
+LOG(PageCache, "WebCoreLoading %s: About to commit provisional load from previous URL '%s' to new URL '%s'", m_frame->tree()->name().string().utf8().data(), m_URL.string().utf8().data(),
+pdl ? pdl->url().string().utf8().data() : "<no provisional DocumentLoader>");
+// Check to see if we need to cache the page we are navigating away from into the back/forward cache.
+// We are doing this here because we know for sure that a new page is about to be loaded.
+HistoryItem* item = history()->currentItem();
+if (!m_frame->tree()->parent() && PageCache::canCache(m_frame->page()) && !item->isInPageCache())
+pageCache()->add(item, m_frame->page());
+if (m_loadType != FrameLoadTypeReplace)
+closeOldDataSources();
+if (!cachedPage && !m_stateMachine.creatingInitialEmptyDocument())
+m_client->makeRepresentation(pdl.get());
+transitionToCommitted(cachedPage);
+// Call clientRedirectCancelledOrFinished() here so that the frame load delegate is notified that the redirect's
+// status has changed, if there was a redirect.  The frame load delegate may have saved some state about
+// the redirect in its -webView:willPerformClientRedirectToURL:delay:fireDate:forFrame:.  Since we are
+// just about to commit a new page, there cannot possibly be a pending redirect at this point.
+if (m_sentRedirectNotification)
+clientRedirectCancelledOrFinished(false);
+if (cachedPage && cachedPage->document()) {
+prepareForCachedPageRestore();
+cachedPage->restore(m_frame->page());
+checkCompleted();
+} else {
+KURL url = pdl->substituteData().responseURL();
+if (url.isEmpty())
+url = pdl->url();
+if (url.isEmpty())
+url = pdl->responseURL();
+if (url.isEmpty())
+url = blankURL();
+didOpenURL(url);
+}
+LOG(Loading, "WebCoreLoading %s: Finished committing provisional load to URL %s", m_frame->tree()->name().string().utf8().data(), m_URL.string().utf8().data());
+if (m_loadType == FrameLoadTypeStandard && m_documentLoader->isClientRedirect())
+history()->updateForClientRedirect();
+if (m_loadingFromCachedPage) {
+m_frame->document()->documentDidBecomeActive();
+// Force a layout to update view size and thereby update scrollbars.
+m_frame->view()->forceLayout();
+const ResponseVector& responses = m_documentLoader->responses();
+size_t count = responses.size();
+for (size_t i = 0; i < count; i++) {
+const ResourceResponse& response = responses[i];
+// FIXME: If the WebKit client changes or cancels the request, this is not respected.
+ResourceError error;
+unsigned long identifier;
+ResourceRequest request(response.url());
+requestFromDelegate(request, identifier, error);
+// FIXME: If we get a resource with more than 2B bytes, this code won't do the right thing.
+// However, with today's computers and networking speeds, this won't happen in practice.
+// Could be an issue with a giant local file.
+notifier()->sendRemainingDelegateMessages(m_documentLoader.get(), identifier, response, static_cast<int>(response.expectedContentLength()), error);
+}
+pageCache()->remove(history()->currentItem());
+m_documentLoader->setPrimaryLoadComplete(true);
+// FIXME: Why only this frame and not parent frames?
+checkLoadCompleteForThisFrame();
+}
+}
+void FrameLoader::transitionToCommitted(PassRefPtr<CachedPage> cachedPage)
+{
+ASSERT(m_client->hasWebView());
+ASSERT(m_state == FrameStateProvisional);
+if (m_state != FrameStateProvisional)
+return;
+m_client->setCopiesOnScroll();
+history()->updateForCommit();
+// The call to closeURL() invokes the unload event handler, which can execute arbitrary
+// JavaScript. If the script initiates a new load, we need to abandon the current load,
+// or the two will stomp each other.
+DocumentLoader* pdl = m_provisionalDocumentLoader.get();
+if (m_documentLoader)
+closeURL();
+if (pdl != m_provisionalDocumentLoader)
+return;
+// Nothing else can interupt this commit - set the Provisional->Committed transition in stone
+if (m_documentLoader)
+m_documentLoader->stopLoadingSubresources();
+if (m_documentLoader)
+m_documentLoader->stopLoadingPlugIns();
+setDocumentLoader(m_provisionalDocumentLoader.get());
+setProvisionalDocumentLoader(0);
+setState(FrameStateCommittedPage);
+// Handle adding the URL to the back/forward list.
+DocumentLoader* dl = m_documentLoader.get();
+String ptitle = dl->title();
+switch (m_loadType) {
+case FrameLoadTypeForward:
+case FrameLoadTypeBack:
+case FrameLoadTypeBackWMLDeckNotAccessible:
+case FrameLoadTypeIndexedBackForward:
+if (Page* page = m_frame->page()) {
+if (page->backForwardList()) {
+// If the first load within a frame is a navigation within a back/forward list that was attached
+// without any of the items being loaded then we need to update the history in a similar manner as
+// for a standard load with the exception of updating the back/forward list (<rdar://problem/8091103>).
+if (!m_stateMachine.committedFirstRealDocumentLoad())
+history()->updateForStandardLoad(HistoryController::UpdateAllExceptBackForwardList);
+history()->updateForBackForwardNavigation();
+if (history()->currentItem())
+m_pendingStateObject = history()->currentItem()->stateObject();
+// Create a document view for this document, or used the cached view.
+if (cachedPage) {
+DocumentLoader* cachedDocumentLoader = cachedPage->documentLoader();
+ASSERT(cachedDocumentLoader);
+cachedDocumentLoader->setFrame(m_frame);
+m_client->transitionToCommittedFromCachedFrame(cachedPage->cachedMainFrame());
+} else
+m_client->transitionToCommittedForNewPage();
+}
+}
+break;
+case FrameLoadTypeReload:
+case FrameLoadTypeReloadFromOrigin:
+case FrameLoadTypeSame:
+case FrameLoadTypeReplace:
+history()->updateForReload();
+m_client->transitionToCommittedForNewPage();
+break;
+case FrameLoadTypeStandard:
+history()->updateForStandardLoad();
+#ifndef BUILDING_ON_TIGER
+// This code was originally added for a Leopard performance imporvement. We decided to
+// ifdef it to fix correctness issues on Tiger documented in <rdar://problem/5441823>.
+if (m_frame->view())
+m_frame->view()->setScrollbarsSuppressed(true);
+#endif
+m_client->transitionToCommittedForNewPage();
+break;
+case FrameLoadTypeRedirectWithLockedBackForwardList:
+history()->updateForRedirectWithLockedBackForwardList();
+m_client->transitionToCommittedForNewPage();
+break;
+// FIXME Remove this check when dummy ds is removed (whatever "dummy ds" is).
+// An exception should be thrown if we're in the FrameLoadTypeUninitialized state.
+default:
+ASSERT_NOT_REACHED();
+}
+writer()->setMIMEType(dl->responseMIMEType());
+// Tell the client we've committed this URL.
+ASSERT(m_frame->view());
+if (m_stateMachine.creatingInitialEmptyDocument())
+return;
+if (!m_stateMachine.committedFirstRealDocumentLoad())
+m_stateMachine.advanceTo(FrameLoaderStateMachine::DisplayingInitialEmptyDocumentPostCommit);
+if (!m_client->hasHTMLView())
+receivedFirstData();
+else if (cachedPage) {
+// For non-cached HTML pages, these methods are called in receivedFirstData().
+dispatchDidCommitLoad();
+// If we have a title let the WebView know about it.
+if (!ptitle.isNull())
+m_client->dispatchDidReceiveTitle(ptitle);
+}
+}
+void FrameLoader::clientRedirectCancelledOrFinished(bool cancelWithLoadInProgress)
+{
+// Note that -webView:didCancelClientRedirectForFrame: is called on the frame load delegate even if
+// the redirect succeeded.  We should either rename this API, or add a new method, like
+// -webView:didFinishClientRedirectForFrame:
+m_client->dispatchDidCancelClientRedirect();
+if (!cancelWithLoadInProgress)
+m_quickRedirectComing = false;
+m_sentRedirectNotification = false;
+}
+void FrameLoader::clientRedirected(const KURL& url, double seconds, double fireDate, bool lockBackForwardList)
+{
+m_client->dispatchWillPerformClientRedirect(url, seconds, fireDate);
+// Remember that we sent a redirect notification to the frame load delegate so that when we commit
+// the next provisional load, we can send a corresponding -webView:didCancelClientRedirectForFrame:
+m_sentRedirectNotification = true;
+// If a "quick" redirect comes in, we set a special mode so we treat the next
+// load as part of the original navigation. If we don't have a document loader, we have
+// no "original" load on which to base a redirect, so we treat the redirect as a normal load.
+// Loads triggered by JavaScript form submissions never count as quick redirects.
+m_quickRedirectComing = (lockBackForwardList || history()->currentItemShouldBeReplaced()) && m_documentLoader && !m_isExecutingJavaScriptFormAction;
+}
+bool FrameLoader::shouldReload(const KURL& currentURL, const KURL& destinationURL)
+{
+#if ENABLE(WML)
+// All WML decks are supposed to be reloaded, even within the same URL fragment
+if (frameContainsWMLContent(m_frame))
+return true;
+#endif
+// This function implements the rule: "Don't reload if navigating by fragment within
+// the same URL, but do reload if going to a new URL or to the same URL with no
+// fragment identifier at all."
+if (!destinationURL.hasFragmentIdentifier())
+return true;
+return !equalIgnoringFragmentIdentifier(currentURL, destinationURL);
+}
+void FrameLoader::closeOldDataSources()
+{
+// FIXME: Is it important for this traversal to be postorder instead of preorder?
+// If so, add helpers for postorder traversal, and use them. If not, then lets not
+// use a recursive algorithm here.
+for (Frame* child = m_frame->tree()->firstChild(); child; child = child->tree()->nextSibling())
+child->loader()->closeOldDataSources();
+if (m_documentLoader)
+m_client->dispatchWillClose();
+m_client->setMainFrameDocumentReady(false); // stop giving out the actual DOMDocument to observers
+}
+void FrameLoader::prepareForCachedPageRestore()
+{
+ASSERT(!m_frame->tree()->parent());
+ASSERT(m_frame->page());
+ASSERT(m_frame->page()->mainFrame() == m_frame);
+m_frame->redirectScheduler()->cancel();
+// We still have to close the previous part page.
+closeURL();
+// Delete old status bar messages (if it _was_ activated on last URL).
+if (m_frame->script()->canExecuteScripts(NotAboutToExecuteScript)) {
+if (DOMWindow* window = m_frame->existingDOMWindow()) {
+window->setStatus(String());
+window->setDefaultStatus(String());
+}
+}
+}
+void FrameLoader::open(CachedFrameBase& cachedFrame)
+{
+m_isComplete = false;
+// Don't re-emit the load event.
+m_didCallImplicitClose = true;
+KURL url = cachedFrame.url();
+if (url.protocolInHTTPFamily() && !url.host().isEmpty() && url.path().isEmpty())
+url.setPath("/");
+m_URL = url;
+m_workingURL = url;
+started();
+clear(true, true, cachedFrame.isMainFrame());
+Document* document = cachedFrame.document();
+ASSERT(document);
+document->setInPageCache(false);
+m_needsClear = true;
+m_isComplete = false;
+m_didCallImplicitClose = false;
+m_outgoingReferrer = url.string();
+FrameView* view = cachedFrame.view();
+// When navigating to a CachedFrame its FrameView should never be null.  If it is we'll crash in creative ways downstream.
+ASSERT(view);
+view->setWasScrolledByUser(false);
+// Use the current ScrollView's frame rect.
+if (m_frame->view())
+view->setFrameRect(m_frame->view()->frameRect());
+m_frame->setView(view);
+m_frame->setDocument(document);
+m_frame->setDOMWindow(cachedFrame.domWindow());
+m_frame->domWindow()->setURL(document->url());
+m_frame->domWindow()->setSecurityOrigin(document->securityOrigin());
+writer()->setDecoder(document->decoder());
+updateFirstPartyForCookies();
+cachedFrame.restore();
+}
+bool FrameLoader::isStopping() const
+{
+return activeDocumentLoader()->isStopping();
+}
+void FrameLoader::finishedLoading()
+{
+// Retain because the stop may release the last reference to it.
+RefPtr<Frame> protect(m_frame);
+RefPtr<DocumentLoader> dl = activeDocumentLoader();
+dl->finishedLoading();
+if (!dl->mainDocumentError().isNull() || !dl->frameLoader())
+return;
+dl->setPrimaryLoadComplete(true);
+m_client->dispatchDidLoadMainResource(dl.get());
+checkLoadComplete();
+}
+bool FrameLoader::isHostedByObjectElement() const
+{
+HTMLFrameOwnerElement* owner = m_frame->ownerElement();
+return owner && owner->hasTagName(objectTag);
+}
+bool FrameLoader::isLoadingMainFrame() const
+{
+Page* page = m_frame->page();
+return page && m_frame == page->mainFrame();
+}
+bool FrameLoader::canShowMIMEType(const String& MIMEType) const
+{
+return m_client->canShowMIMEType(MIMEType);
+}
+bool FrameLoader::representationExistsForURLScheme(const String& URLScheme)
+{
+return m_client->representationExistsForURLScheme(URLScheme);
+}
+String FrameLoader::generatedMIMETypeForURLScheme(const String& URLScheme)
+{
+return m_client->generatedMIMETypeForURLScheme(URLScheme);
+}
+void FrameLoader::didReceiveServerRedirectForProvisionalLoadForFrame()
+{
+m_client->dispatchDidReceiveServerRedirectForProvisionalLoad();
+}
+void FrameLoader::finishedLoadingDocument(DocumentLoader* loader)
+{
+// FIXME: Platforms shouldn't differ here!
+#if PLATFORM(WIN) || PLATFORM(CHROMIUM)
+if (m_stateMachine.creatingInitialEmptyDocument())
+return;
+#endif
+// If loading a webarchive, run through webarchive machinery
+const String& responseMIMEType = loader->responseMIMEType();
+// FIXME: Mac's FrameLoaderClient::finishedLoading() method does work that is required even with Archive loads
+// so we still need to call it.  Other platforms should only call finishLoading for non-archive loads
+// That work should be factored out so this #ifdef can be removed
+#if PLATFORM(MAC)
+m_client->finishedLoading(loader);
+if (!ArchiveFactory::isArchiveMimeType(responseMIMEType))
+return;
+#else
+if (!ArchiveFactory::isArchiveMimeType(responseMIMEType)) {
+m_client->finishedLoading(loader);
+return;
+}
+#endif
+RefPtr<Archive> archive(ArchiveFactory::create(loader->mainResourceData().get(), responseMIMEType));
+if (!archive)
+return;
+loader->addAllArchiveResources(archive.get());
+ArchiveResource* mainResource = archive->mainResource();
+loader->setParsedArchiveData(mainResource->data());
+writer()->setMIMEType(mainResource->mimeType());
+closeURL();
+didOpenURL(mainResource->url());
+String userChosenEncoding = documentLoader()->overrideEncoding();
+bool encodingIsUserChosen = !userChosenEncoding.isNull();
+writer()->setEncoding(encodingIsUserChosen ? userChosenEncoding : mainResource->textEncoding(), encodingIsUserChosen);
+ASSERT(m_frame->document());
+addData(mainResource->data()->data(), mainResource->data()->size());
+}
+bool FrameLoader::isReplacing() const
+{
+return m_loadType == FrameLoadTypeReplace;
+}
+void FrameLoader::setReplacing()
+{
+m_loadType = FrameLoadTypeReplace;
+}
+void FrameLoader::revertToProvisional(DocumentLoader* loader)
+{
+m_client->revertToProvisionalState(loader);
+}
+bool FrameLoader::subframeIsLoading() const
+{
+// It's most likely that the last added frame is the last to load so we walk backwards.
+for (Frame* child = m_frame->tree()->lastChild(); child; child = child->tree()->previousSibling()) {
+FrameLoader* childLoader = child->loader();
+DocumentLoader* documentLoader = childLoader->documentLoader();
+if (documentLoader && documentLoader->isLoadingInAPISense())
+return true;
+documentLoader = childLoader->provisionalDocumentLoader();
+if (documentLoader && documentLoader->isLoadingInAPISense())
+return true;
+documentLoader = childLoader->policyDocumentLoader();
+if (documentLoader)
+return true;
+}
+return false;
+}
+void FrameLoader::willChangeTitle(DocumentLoader* loader)
+{
+m_client->willChangeTitle(loader);
+}
+FrameLoadType FrameLoader::loadType() const
+{
+return m_loadType;
+}
+CachePolicy FrameLoader::subresourceCachePolicy() const
+{
+if (m_isComplete)
+return CachePolicyVerify;
+if (m_loadType == FrameLoadTypeReloadFromOrigin)
+return CachePolicyReload;
+if (Frame* parentFrame = m_frame->tree()->parent()) {
+CachePolicy parentCachePolicy = parentFrame->loader()->subresourceCachePolicy();
+if (parentCachePolicy != CachePolicyVerify)
+return parentCachePolicy;
+}
+// FIXME: POST documents are always Reloads, but their subresources should still be Revalidate.
+// If we bring the CachePolicy.h and ResourceRequest cache policy enums in sync with each other and
+// remember "Revalidate" in ResourceRequests, we can remove this "POST" check and return either "Reload"
+// or "Revalidate" if the DocumentLoader was requested with either.
+const ResourceRequest& request(documentLoader()->request());
+if (request.cachePolicy() == ReloadIgnoringCacheData && !equalIgnoringCase(request.httpMethod(), "post"))
+return CachePolicyRevalidate;
+if (m_loadType == FrameLoadTypeReload)
+return CachePolicyRevalidate;
+if (request.cachePolicy() == ReturnCacheDataElseLoad)
+return CachePolicyAllowStale;
+return CachePolicyVerify;
+}
+void FrameLoader::checkLoadCompleteForThisFrame()
+{
+ASSERT(m_client->hasWebView());
+switch (m_state) {
+case FrameStateProvisional: {
+if (m_delegateIsHandlingProvisionalLoadError)
+return;
+RefPtr<DocumentLoader> pdl = m_provisionalDocumentLoader;
+if (!pdl)
+return;
+// If we've received any errors we may be stuck in the provisional state and actually complete.
+const ResourceError& error = pdl->mainDocumentError();
+if (error.isNull())
+return;
+// Check all children first.
+RefPtr<HistoryItem> item;
+if (Page* page = m_frame->page())
+if (isBackForwardLoadType(loadType()) && m_frame == page->mainFrame())
+item = history()->currentItem();
+bool shouldReset = true;
+if (!(pdl->isLoadingInAPISense() && !pdl->isStopping())) {
+m_delegateIsHandlingProvisionalLoadError = true;
+m_client->dispatchDidFailProvisionalLoad(error);
+m_delegateIsHandlingProvisionalLoadError = false;
+// FIXME: can stopping loading here possibly have any effect, if isLoading is false,
+// which it must be to be in this branch of the if? And is it OK to just do a full-on
+// stopAllLoaders instead of stopLoadingSubframes?
+stopLoadingSubframes();
+pdl->stopLoading();
+// If we're in the middle of loading multipart data, we need to restore the document loader.
+if (isReplacing() && !m_documentLoader.get())
+setDocumentLoader(m_provisionalDocumentLoader.get());
+// Finish resetting the load state, but only if another load hasn't been started by the
+// delegate callback.
+if (pdl == m_provisionalDocumentLoader)
+clearProvisionalLoad();
+else if (activeDocumentLoader()) {
+KURL unreachableURL = activeDocumentLoader()->unreachableURL();
+if (!unreachableURL.isEmpty() && unreachableURL == pdl->request().url())
+shouldReset = false;
+}
+}
+if (shouldReset && item)
+if (Page* page = m_frame->page()) {
+page->backForwardList()->goToItem(item.get());
+Settings* settings = m_frame->settings();
+page->setGlobalHistoryItem((!settings || settings->privateBrowsingEnabled()) ? 0 : item.get());
+}
+return;
+}
+case FrameStateCommittedPage: {
+DocumentLoader* dl = m_documentLoader.get();
+if (!dl || (dl->isLoadingInAPISense() && !dl->isStopping()))
+return;
+markLoadComplete();
+// FIXME: Is this subsequent work important if we already navigated away?
+// Maybe there are bugs because of that, or extra work we can skip because
+// the new page is ready.
+m_client->forceLayoutForNonHTML();
+// If the user had a scroll point, scroll to it, overriding the anchor point if any.
+if (Page* page = m_frame->page())
+if ((isBackForwardLoadType(m_loadType) || m_loadType == FrameLoadTypeReload || m_loadType == FrameLoadTypeReloadFromOrigin) && page->backForwardList())
+history()->restoreScrollPositionAndViewState();
+if (m_stateMachine.creatingInitialEmptyDocument() || !m_stateMachine.committedFirstRealDocumentLoad())
+return;
+const ResourceError& error = dl->mainDocumentError();
+#ifndef NDEBUG
+m_didDispatchDidCommitLoad = false;
+#endif
+if (!error.isNull())
+m_client->dispatchDidFailLoad(error);
+else
+m_client->dispatchDidFinishLoad();
+if (Page* page = m_frame->page())
+page->progress()->progressCompleted(m_frame);
+return;
+}
+case FrameStateComplete:
+frameLoadCompleted();
+return;
+}
+ASSERT_NOT_REACHED();
+}
+void FrameLoader::continueLoadAfterWillSubmitForm()
+{
+if (!m_provisionalDocumentLoader)
+return;
+// DocumentLoader calls back to our prepareForLoadStart
+m_provisionalDocumentLoader->prepareForLoadStart();
+// The load might be cancelled inside of prepareForLoadStart(), nulling out the m_provisionalDocumentLoader,
+// so we need to null check it again.
+if (!m_provisionalDocumentLoader)
+return;
+DocumentLoader* activeDocLoader = activeDocumentLoader();
+if (activeDocLoader && activeDocLoader->isLoadingMainResource())
+return;
+m_loadingFromCachedPage = false;
+unsigned long identifier = 0;
+if (Page* page = m_frame->page()) {
+identifier = page->progress()->createUniqueIdentifier();
+notifier()->assignIdentifierToInitialRequest(identifier, m_provisionalDocumentLoader.get(), m_provisionalDocumentLoader->originalRequest());
+}
+ASSERT(!m_provisionalDocumentLoader->timing()->navigationStart);
+m_provisionalDocumentLoader->timing()->navigationStart = currentTime();
+if (!m_provisionalDocumentLoader->startLoadingMainResource(identifier))
+m_provisionalDocumentLoader->updateLoading();
+}
+void FrameLoader::didFirstLayout()
+{
+if (Page* page = m_frame->page())
+if (isBackForwardLoadType(m_loadType) && page->backForwardList())
+history()->restoreScrollPositionAndViewState();
+if (m_stateMachine.committedFirstRealDocumentLoad() && !m_stateMachine.isDisplayingInitialEmptyDocument() && !m_stateMachine.firstLayoutDone())
+m_stateMachine.advanceTo(FrameLoaderStateMachine::FirstLayoutDone);
+m_client->dispatchDidFirstLayout();
+}
+void FrameLoader::didFirstVisuallyNonEmptyLayout()
+{
+m_client->dispatchDidFirstVisuallyNonEmptyLayout();
+}
+void FrameLoader::frameLoadCompleted()
+{
+// Note: Can be called multiple times.
+m_client->frameLoadCompleted();
+history()->updateForFrameLoadCompleted();
+// After a canceled provisional load, firstLayoutDone is false.
+// Reset it to true if we're displaying a page.
+if (m_documentLoader && m_stateMachine.committedFirstRealDocumentLoad() && !m_stateMachine.isDisplayingInitialEmptyDocument() && !m_stateMachine.firstLayoutDone())
+m_stateMachine.advanceTo(FrameLoaderStateMachine::FirstLayoutDone);
+}
+void FrameLoader::detachChildren()
+{
+// FIXME: Is it really necessary to do this in reverse order?
+Frame* previous;
+for (Frame* child = m_frame->tree()->lastChild(); child; child = previous) {
+previous = child->tree()->previousSibling();
+child->loader()->detachFromParent();
+}
+}
+void FrameLoader::closeAndRemoveChild(Frame* child)
+{
+child->tree()->detachFromParent();
+child->setView(0);
+if (child->ownerElement() && child->page())
+child->page()->decrementFrameCount();
+child->pageDestroyed();
+m_frame->tree()->removeChild(child);
+}
+void FrameLoader::recursiveCheckLoadComplete()
+{
+Vector<RefPtr<Frame>, 10> frames;
+for (RefPtr<Frame> frame = m_frame->tree()->firstChild(); frame; frame = frame->tree()->nextSibling())
+frames.append(frame);
+unsigned size = frames.size();
+for (unsigned i = 0; i < size; i++)
+frames[i]->loader()->recursiveCheckLoadComplete();
+checkLoadCompleteForThisFrame();
+}
+// Called every time a resource is completely loaded, or an error is received.
+void FrameLoader::checkLoadComplete()
+{
+ASSERT(m_client->hasWebView());
+m_shouldCallCheckLoadComplete = false;
+// FIXME: Always traversing the entire frame tree is a bit inefficient, but
+// is currently needed in order to null out the previous history item for all frames.
+if (Page* page = m_frame->page())
+page->mainFrame()->loader()->recursiveCheckLoadComplete();
+}
+int FrameLoader::numPendingOrLoadingRequests(bool recurse) const
+{
+if (!recurse)
+return numRequests(m_frame->document());
+int count = 0;
+for (Frame* frame = m_frame; frame; frame = frame->tree()->traverseNext(m_frame))
+count += numRequests(frame->document());
+return count;
+}
+String FrameLoader::userAgent(const KURL& url) const
+{
+return m_client->userAgent(url);
+}
+void FrameLoader::handledOnloadEvents()
+{
+m_client->dispatchDidHandleOnloadEvents();
+#if ENABLE(OFFLINE_WEB_APPLICATIONS)
+if (documentLoader())
+documentLoader()->applicationCacheHost()->stopDeferringEvents();
+#endif
+}
+void FrameLoader::frameDetached()
+{
+stopAllLoaders();
+m_frame->document()->stopActiveDOMObjects();
+detachFromParent();
+}
+void FrameLoader::detachFromParent()
+{
+RefPtr<Frame> protect(m_frame);
+closeURL();
+stopAllLoaders();
+history()->saveScrollPositionAndViewStateToItem(history()->currentItem());
+detachChildren();
+#if ENABLE(INSPECTOR)
+if (Page* page = m_frame->page())
+page->inspectorController()->frameDetachedFromParent(m_frame);
+#endif
+detachViewsAndDocumentLoader();
+if (Frame* parent = m_frame->tree()->parent()) {
+parent->loader()->closeAndRemoveChild(m_frame);
+parent->loader()->scheduleCheckCompleted();
+} else {
+m_frame->setView(0);
+m_frame->pageDestroyed();
+}
+}
+void FrameLoader::detachViewsAndDocumentLoader()
+{
+m_client->detachedFromParent2();
+setDocumentLoader(0);
+m_client->detachedFromParent3();
+}
+void FrameLoader::addExtraFieldsToSubresourceRequest(ResourceRequest& request)
+{
+addExtraFieldsToRequest(request, m_loadType, false, false);
+}
+void FrameLoader::addExtraFieldsToMainResourceRequest(ResourceRequest& request)
+{
+addExtraFieldsToRequest(request, m_loadType, true, false);
+}
+void FrameLoader::addExtraFieldsToRequest(ResourceRequest& request, FrameLoadType loadType, bool mainResource, bool cookiePolicyURLFromRequest)
+{
+// Don't set the cookie policy URL if it's already been set.
+// But make sure to set it on all requests, as it has significance beyond the cookie policy for all protocols (<rdar://problem/6616664>).
+if (request.firstPartyForCookies().isEmpty()) {
+if (mainResource && (isLoadingMainFrame() || cookiePolicyURLFromRequest))
+request.setFirstPartyForCookies(request.url());
+else if (Document* document = m_frame->document())
+request.setFirstPartyForCookies(document->firstPartyForCookies());
+}
+// The remaining modifications are only necessary for HTTP and HTTPS.
+if (!request.url().isEmpty() && !request.url().protocolInHTTPFamily())
+return;
+applyUserAgent(request);
+// If we inherit cache policy from a main resource, we use the DocumentLoader's
+// original request cache policy for two reasons:
+// 1. For POST requests, we mutate the cache policy for the main resource,
+//    but we do not want this to apply to subresources
+// 2. Delegates that modify the cache policy using willSendRequest: should
+//    not affect any other resources. Such changes need to be done
+//    per request.
+if (!mainResource) {
+if (request.isConditional())
+request.setCachePolicy(ReloadIgnoringCacheData);
+else if (documentLoader()->isLoadingInAPISense())
+request.setCachePolicy(documentLoader()->originalRequest().cachePolicy());
+else
+request.setCachePolicy(UseProtocolCachePolicy);
+} else if (loadType == FrameLoadTypeReload) {
+request.setCachePolicy(ReloadIgnoringCacheData);
+request.setHTTPHeaderField("Cache-Control", "max-age=0");
+} else if (loadType == FrameLoadTypeReloadFromOrigin) {
+request.setCachePolicy(ReloadIgnoringCacheData);
+request.setHTTPHeaderField("Cache-Control", "no-cache");
+request.setHTTPHeaderField("Pragma", "no-cache");
+} else if (request.isConditional())
+request.setCachePolicy(ReloadIgnoringCacheData);
+else if (isBackForwardLoadType(loadType) && m_stateMachine.committedFirstRealDocumentLoad() && !request.url().protocolIs("https"))
+request.setCachePolicy(ReturnCacheDataElseLoad);
+if (mainResource)
+request.setHTTPAccept(defaultAcceptHeader);
+// Make sure we send the Origin header.
+addHTTPOriginIfNeeded(request, String());
+// Always try UTF-8. If that fails, try frame encoding (if any) and then the default.
+// For a newly opened frame with an empty URL, encoding() should not be used, because this methods asks decoder, which uses ISO-8859-1.
+Settings* settings = m_frame->settings();
+request.setResponseContentDispositionEncodingFallbackArray("UTF-8", writer()->deprecatedFrameEncoding(), settings ? settings->defaultTextEncodingName() : String());
+}
+void FrameLoader::addHTTPOriginIfNeeded(ResourceRequest& request, String origin)
+{
+if (!request.httpOrigin().isEmpty())
+return;  // Request already has an Origin header.
+// Don't send an Origin header for GET or HEAD to avoid privacy issues.
+// For example, if an intranet page has a hyperlink to an external web
+// site, we don't want to include the Origin of the request because it
+// will leak the internal host name. Similar privacy concerns have lead
+// to the widespread suppression of the Referer header at the network
+// layer.
+if (request.httpMethod() == "GET" || request.httpMethod() == "HEAD")
+return;
+// For non-GET and non-HEAD methods, always send an Origin header so the
+// server knows we support this feature.
+if (origin.isEmpty()) {
+// If we don't know what origin header to attach, we attach the value
+// for an empty origin.
+origin = SecurityOrigin::createEmpty()->toString();
+}
+request.setHTTPOrigin(origin);
+}
+void FrameLoader::committedLoad(DocumentLoader* loader, const char* data, int length)
+{
+if (ArchiveFactory::isArchiveMimeType(loader->response().mimeType()))
+return;
+m_client->committedLoad(loader, data, length);
+}
+void FrameLoader::loadPostRequest(const ResourceRequest& inRequest, const String& referrer, const String& frameName, bool lockHistory, FrameLoadType loadType, PassRefPtr<Event> event, PassRefPtr<FormState> prpFormState)
+{
+RefPtr<FormState> formState = prpFormState;
+// When posting, use the NSURLRequestReloadIgnoringCacheData load flag.
+// This prevents a potential bug which may cause a page with a form that uses itself
+// as an action to be returned from the cache without submitting.
+// FIXME: Where's the code that implements what the comment above says?
+// Previously when this method was reached, the original FrameLoadRequest had been deconstructed to build a
+// bunch of parameters that would come in here and then be built back up to a ResourceRequest.  In case
+// any caller depends on the immutability of the original ResourceRequest, I'm rebuilding a ResourceRequest
+// from scratch as it did all along.
+const KURL& url = inRequest.url();
+RefPtr<FormData> formData = inRequest.httpBody();
+const String& contentType = inRequest.httpContentType();
+String origin = inRequest.httpOrigin();
+ResourceRequest workingResourceRequest(url);
+if (!referrer.isEmpty())
+workingResourceRequest.setHTTPReferrer(referrer);
+workingResourceRequest.setHTTPOrigin(origin);
+workingResourceRequest.setHTTPMethod("POST");
+workingResourceRequest.setHTTPBody(formData);
+workingResourceRequest.setHTTPContentType(contentType);
+addExtraFieldsToRequest(workingResourceRequest, loadType, true, true);
+NavigationAction action(url, loadType, true, event);
+if (!frameName.isEmpty()) {
+// The search for a target frame is done earlier in the case of form submission.
+if (Frame* targetFrame = formState ? 0 : findFrameForNavigation(frameName))
+targetFrame->loader()->loadWithNavigationAction(workingResourceRequest, action, lockHistory, loadType, formState.release());
+else
+policyChecker()->checkNewWindowPolicy(action, FrameLoader::callContinueLoadAfterNewWindowPolicy, workingResourceRequest, formState.release(), frameName, this);
+} else
+loadWithNavigationAction(workingResourceRequest, action, lockHistory, loadType, formState.release());
+}
+unsigned long FrameLoader::loadResourceSynchronously(const ResourceRequest& request, StoredCredentials storedCredentials, ResourceError& error, ResourceResponse& response, Vector<char>& data)
+{
+String referrer = m_outgoingReferrer;
+if (SecurityOrigin::shouldHideReferrer(request.url(), referrer))
+referrer = String();
+ResourceRequest initialRequest = request;
+initialRequest.setTimeoutInterval(10);
+if (!referrer.isEmpty())
+initialRequest.setHTTPReferrer(referrer);
+addHTTPOriginIfNeeded(initialRequest, outgoingOrigin());
+if (Page* page = m_frame->page())
+initialRequest.setFirstPartyForCookies(page->mainFrame()->loader()->documentLoader()->request().url());
+initialRequest.setHTTPUserAgent(client()->userAgent(request.url()));
+addExtraFieldsToSubresourceRequest(initialRequest);
+unsigned long identifier = 0;
+ResourceRequest newRequest(initialRequest);
+requestFromDelegate(newRequest, identifier, error);
+if (error.isNull()) {
+ASSERT(!newRequest.isNull());
+#if ENABLE(OFFLINE_WEB_APPLICATIONS)
+if (!documentLoader()->applicationCacheHost()->maybeLoadSynchronously(newRequest, error, response, data)) {
+#endif
+ResourceHandle::loadResourceSynchronously(newRequest, storedCredentials, error, response, data, m_frame);
+#if ENABLE(OFFLINE_WEB_APPLICATIONS)
+documentLoader()->applicationCacheHost()->maybeLoadFallbackSynchronously(newRequest, error, response, data);
+}
+#endif
+}
+notifier()->sendRemainingDelegateMessages(m_documentLoader.get(), identifier, response, data.size(), error);
+return identifier;
+}
+const ResourceRequest& FrameLoader::originalRequest() const
+{
+return activeDocumentLoader()->originalRequestCopy();
+}
+void FrameLoader::receivedMainResourceError(const ResourceError& error, bool isComplete)
+{
+// Retain because the stop may release the last reference to it.
+RefPtr<Frame> protect(m_frame);
+RefPtr<DocumentLoader> loader = activeDocumentLoader();
+if (isComplete) {
+// FIXME: Don't want to do this if an entirely new load is going, so should check
+// that both data sources on the frame are either this or nil.
+stop();
+if (m_client->shouldFallBack(error))
+handleFallbackContent();
+}
+if (m_state == FrameStateProvisional && m_provisionalDocumentLoader) {
+if (m_submittedFormURL == m_provisionalDocumentLoader->originalRequestCopy().url())
+m_submittedFormURL = KURL();
+// We might have made a page cache item, but now we're bailing out due to an error before we ever
+// transitioned to the new page (before WebFrameState == commit).  The goal here is to restore any state
+// so that the existing view (that wenever got far enough to replace) can continue being used.
+history()->invalidateCurrentItemCachedPage();
+// Call clientRedirectCancelledOrFinished here so that the frame load delegate is notified that the redirect's
+// status has changed, if there was a redirect. The frame load delegate may have saved some state about
+// the redirect in its -webView:willPerformClientRedirectToURL:delay:fireDate:forFrame:. Since we are definitely
+// not going to use this provisional resource, as it was cancelled, notify the frame load delegate that the redirect
+// has ended.
+if (m_sentRedirectNotification)
+clientRedirectCancelledOrFinished(false);
+}
+loader->mainReceivedError(error, isComplete);
+}
+void FrameLoader::callContinueFragmentScrollAfterNavigationPolicy(void* argument,
+const ResourceRequest& request, PassRefPtr<FormState>, bool shouldContinue)
+{
+FrameLoader* loader = static_cast<FrameLoader*>(argument);
+loader->continueFragmentScrollAfterNavigationPolicy(request, shouldContinue);
+}
+void FrameLoader::continueFragmentScrollAfterNavigationPolicy(const ResourceRequest& request, bool shouldContinue)
+{
+m_quickRedirectComing = false;
+if (!shouldContinue)
+return;
+bool isRedirect = m_quickRedirectComing || policyChecker()->loadType() == FrameLoadTypeRedirectWithLockedBackForwardList;
+loadInSameDocument(request.url(), 0, !isRedirect);
+}
+bool FrameLoader::shouldScrollToAnchor(bool isFormSubmission, FrameLoadType loadType, const KURL& url)
+{
+// Should we do anchor navigation within the existing content?
+// We don't do this if we are submitting a form, explicitly reloading,
+// currently displaying a frameset, or if the URL does not have a fragment.
+// These rules were originally based on what KHTML was doing in KHTMLPart::openURL.
+// FIXME: What about load types other than Standard and Reload?
+return !isFormSubmission
+&& loadType != FrameLoadTypeReload
+&& loadType != FrameLoadTypeReloadFromOrigin
+&& loadType != FrameLoadTypeSame
+&& !shouldReload(this->url(), url)
+// We don't want to just scroll if a link from within a
+// frameset is trying to reload the frameset into _top.
+&& !m_frame->document()->isFrameSet();
+}
+void FrameLoader::callContinueLoadAfterNavigationPolicy(void* argument,
+const ResourceRequest& request, PassRefPtr<FormState> formState, bool shouldContinue)
+{
+FrameLoader* loader = static_cast<FrameLoader*>(argument);
+loader->continueLoadAfterNavigationPolicy(request, formState, shouldContinue);
+}
+bool FrameLoader::shouldClose()
+{
+Page* page = m_frame->page();
+Chrome* chrome = page ? page->chrome() : 0;
+if (!chrome || !chrome->canRunBeforeUnloadConfirmPanel())
+return true;
+DOMWindow* domWindow = m_frame->existingDOMWindow();
+if (!domWindow)
+return true;
+RefPtr<Document> document = m_frame->document();
+HTMLElement* body = document->body();
+if (!body)
+return true;
+RefPtr<BeforeUnloadEvent> beforeUnloadEvent = BeforeUnloadEvent::create();
+m_pageDismissalEventBeingDispatched = true;
+domWindow->dispatchEvent(beforeUnloadEvent.get(), domWindow->document());
+m_pageDismissalEventBeingDispatched = false;
+if (!beforeUnloadEvent->defaultPrevented())
+document->defaultEventHandler(beforeUnloadEvent.get());
+if (beforeUnloadEvent->result().isNull())
+return true;
+String text = document->displayStringModifiedByEncoding(beforeUnloadEvent->result());
+return chrome->runBeforeUnloadConfirmPanel(text, m_frame);
+}
+void FrameLoader::continueLoadAfterNavigationPolicy(const ResourceRequest&, PassRefPtr<FormState> formState, bool shouldContinue)
+{
+// If we loaded an alternate page to replace an unreachableURL, we'll get in here with a
+// nil policyDataSource because loading the alternate page will have passed
+// through this method already, nested; otherwise, policyDataSource should still be set.
+ASSERT(m_policyDocumentLoader || !m_provisionalDocumentLoader->unreachableURL().isEmpty());
+bool isTargetItem = history()->provisionalItem() ? history()->provisionalItem()->isTargetItem() : false;
+// Two reasons we can't continue:
+//    1) Navigation policy delegate said we can't so request is nil. A primary case of this
+//       is the user responding Cancel to the form repost nag sheet.
+//    2) User responded Cancel to an alert popped up by the before unload event handler.
+// The "before unload" event handler runs only for the main frame.
+bool canContinue = shouldContinue && (!isLoadingMainFrame() || shouldClose());
+if (!canContinue) {
+// If we were waiting for a quick redirect, but the policy delegate decided to ignore it, then we
+// need to report that the client redirect was cancelled.
+if (m_quickRedirectComing)
+clientRedirectCancelledOrFinished(false);
+setPolicyDocumentLoader(0);
+// If the navigation request came from the back/forward menu, and we punt on it, we have the
+// problem that we have optimistically moved the b/f cursor already, so move it back.  For sanity,
+// we only do this when punting a navigation for the target frame or top-level frame.
+if ((isTargetItem || isLoadingMainFrame()) && isBackForwardLoadType(policyChecker()->loadType()))
+if (Page* page = m_frame->page()) {
+Frame* mainFrame = page->mainFrame();
+if (HistoryItem* resetItem = mainFrame->loader()->history()->currentItem()) {
+page->backForwardList()->goToItem(resetItem);
+Settings* settings = m_frame->settings();
+page->setGlobalHistoryItem((!settings || settings->privateBrowsingEnabled()) ? 0 : resetItem);
+}
+}
+return;
+}
+FrameLoadType type = policyChecker()->loadType();
+stopAllLoaders();
+// <rdar://problem/6250856> - In certain circumstances on pages with multiple frames, stopAllLoaders()
+// might detach the current FrameLoader, in which case we should bail on this newly defunct load.
+if (!m_frame->page())
+return;
+#if ENABLE(JAVASCRIPT_DEBUGGER) && ENABLE(INSPECTOR) && USE(JSC)
+if (Page* page = m_frame->page()) {
+if (page->mainFrame() == m_frame)
+page->inspectorController()->resume();
+}
+#endif
+setProvisionalDocumentLoader(m_policyDocumentLoader.get());
+m_loadType = type;
+setState(FrameStateProvisional);
+setPolicyDocumentLoader(0);
+if (isBackForwardLoadType(type) && history()->provisionalItem()->isInPageCache()) {
+loadProvisionalItemFromCachedPage();
+return;
+}
+if (formState)
+m_client->dispatchWillSubmitForm(&PolicyChecker::continueLoadAfterWillSubmitForm, formState);
+else
+continueLoadAfterWillSubmitForm();
+}
+void FrameLoader::callContinueLoadAfterNewWindowPolicy(void* argument,
+const ResourceRequest& request, PassRefPtr<FormState> formState, const String& frameName, bool shouldContinue)
+{
+FrameLoader* loader = static_cast<FrameLoader*>(argument);
+loader->continueLoadAfterNewWindowPolicy(request, formState, frameName, shouldContinue);
+}
+void FrameLoader::continueLoadAfterNewWindowPolicy(const ResourceRequest& request,
+PassRefPtr<FormState> formState, const String& frameName, bool shouldContinue)
+{
+if (!shouldContinue)
+return;
+RefPtr<Frame> frame = m_frame;
+RefPtr<Frame> mainFrame = m_client->dispatchCreatePage();
+if (!mainFrame)
+return;
+if (frameName != "_blank")
+mainFrame->tree()->setName(frameName);
+mainFrame->page()->setOpenedByDOM();
+mainFrame->loader()->m_client->dispatchShow();
+if (!m_suppressOpenerInNewFrame)
+mainFrame->loader()->setOpener(frame.get());
+mainFrame->loader()->loadWithNavigationAction(request, NavigationAction(), false, FrameLoadTypeStandard, formState);
+}
+void FrameLoader::requestFromDelegate(ResourceRequest& request, unsigned long& identifier, ResourceError& error)
+{
+ASSERT(!request.isNull());
+identifier = 0;
+if (Page* page = m_frame->page()) {
+identifier = page->progress()->createUniqueIdentifier();
+notifier()->assignIdentifierToInitialRequest(identifier, m_documentLoader.get(), request);
+}
+ResourceRequest newRequest(request);
+notifier()->dispatchWillSendRequest(m_documentLoader.get(), identifier, newRequest, ResourceResponse());
+if (newRequest.isNull())
+error = cancelledError(request);
+else
+error = ResourceError();
+request = newRequest;
+}
+void FrameLoader::loadedResourceFromMemoryCache(const CachedResource* resource)
+{
+Page* page = m_frame->page();
+if (!page)
+return;
+if (!resource->sendResourceLoadCallbacks() || m_documentLoader->haveToldClientAboutLoad(resource->url()))
+return;
+if (!page->areMemoryCacheClientCallsEnabled()) {
+#if ENABLE(INSPECTOR)
+page->inspectorController()->didLoadResourceFromMemoryCache(m_documentLoader.get(), resource);
+#endif
+m_documentLoader->recordMemoryCacheLoadForFutureClientNotification(resource->url());
+m_documentLoader->didTellClientAboutLoad(resource->url());
+return;
+}
+ResourceRequest request(resource->url());
+if (m_client->dispatchDidLoadResourceFromMemoryCache(m_documentLoader.get(), request, resource->response(), resource->encodedSize())) {
+#if ENABLE(INSPECTOR)
+page->inspectorController()->didLoadResourceFromMemoryCache(m_documentLoader.get(), resource);
+#endif
+m_documentLoader->didTellClientAboutLoad(resource->url());
+return;
+}
+unsigned long identifier;
+ResourceError error;
+requestFromDelegate(request, identifier, error);
+notifier()->sendRemainingDelegateMessages(m_documentLoader.get(), identifier, resource->response(), resource->encodedSize(), error);
+}
+void FrameLoader::applyUserAgent(ResourceRequest& request)
+{
+String userAgent = client()->userAgent(request.url());
+ASSERT(!userAgent.isNull());
+request.setHTTPUserAgent(userAgent);
+}
+bool FrameLoader::shouldInterruptLoadForXFrameOptions(const String& content, const KURL& url)
+{
+Frame* topFrame = m_frame->tree()->top();
+if (m_frame == topFrame)
+return false;
+if (equalIgnoringCase(content, "deny"))
+return true;
+if (equalIgnoringCase(content, "sameorigin")) {
+RefPtr<SecurityOrigin> origin = SecurityOrigin::create(url);
+if (!origin->isSameSchemeHostPort(topFrame->document()->securityOrigin()))
+return true;
+}
+return false;
+}
+void FrameLoader::loadProvisionalItemFromCachedPage()
+{
+DocumentLoader* provisionalLoader = provisionalDocumentLoader();
+LOG(PageCache, "WebCorePageCache: Loading provisional DocumentLoader %p with URL '%s' from CachedPage", provisionalDocumentLoader(), provisionalDocumentLoader()->url().string().utf8().data());
+provisionalLoader->prepareForLoadStart();
+m_loadingFromCachedPage = true;
+provisionalLoader->setCommitted(true);
+commitProvisionalLoad();
+}
+bool FrameLoader::shouldTreatURLAsSameAsCurrent(const KURL& url) const
+{
+if (!history()->currentItem())
+return false;
+return url == history()->currentItem()->url() || url == history()->currentItem()->originalURL();
+}
+void FrameLoader::checkDidPerformFirstNavigation()
+{
+Page* page = m_frame->page();
+if (!page)
+return;
+if (!m_didPerformFirstNavigation && page->backForwardList()->entries().size() == 1) {
+m_didPerformFirstNavigation = true;
+m_client->didPerformFirstNavigation();
+}
+}
+Frame* FrameLoader::findFrameForNavigation(const AtomicString& name)
+{
+Frame* frame = m_frame->tree()->find(name);
+if (!shouldAllowNavigation(frame))
+return 0;
+return frame;
+}
+void FrameLoader::navigateWithinDocument(HistoryItem* item)
+{
+ASSERT(item->documentSequenceNumber() == history()->currentItem()->documentSequenceNumber());
+// Save user view state to the current history item here since we don't do a normal load.
+// FIXME: Does form state need to be saved here too?
+history()->saveScrollPositionAndViewStateToItem(history()->currentItem());
+if (FrameView* view = m_frame->view())
+view->setWasScrolledByUser(false);
+history()->setCurrentItem(item);
+// loadInSameDocument() actually changes the URL and notifies load delegates of a "fake" load
+loadInSameDocument(item->url(), item->stateObject(), false);
+// Restore user view state from the current history item here since we don't do a normal load.
+history()->restoreScrollPositionAndViewState();
+}
+// FIXME: This function should really be split into a couple pieces, some of
+// which should be methods of HistoryController and some of which should be
+// methods of FrameLoader.
+void FrameLoader::navigateToDifferentDocument(HistoryItem* item, FrameLoadType loadType)
+{
+// Remember this item so we can traverse any child items as child frames load
+history()->setProvisionalItem(item);
+if (CachedPage* cachedPage = pageCache()->get(item)) {
+loadWithDocumentLoader(cachedPage->documentLoader(), loadType, 0);
+return;
+}
+KURL itemURL = item->url();
+KURL itemOriginalURL = item->originalURL();
+KURL currentURL;
+if (documentLoader())
+currentURL = documentLoader()->url();
+RefPtr<FormData> formData = item->formData();
+bool addedExtraFields = false;
+ResourceRequest request(itemURL);
+if (!item->referrer().isNull())
+request.setHTTPReferrer(item->referrer());
+// If this was a repost that failed the page cache, we might try to repost the form.
+NavigationAction action;
+if (formData) {
+formData->generateFiles(m_frame->document());
+request.setHTTPMethod("POST");
+request.setHTTPBody(formData);
+request.setHTTPContentType(item->formContentType());
+RefPtr<SecurityOrigin> securityOrigin = SecurityOrigin::createFromString(item->referrer());
+addHTTPOriginIfNeeded(request, securityOrigin->toString());
+// Make sure to add extra fields to the request after the Origin header is added for the FormData case.
+// See https://bugs.webkit.org/show_bug.cgi?id=22194 for more discussion.
+addExtraFieldsToRequest(request, m_loadType, true, formData);
+addedExtraFields = true;
+// FIXME: Slight hack to test if the NSURL cache contains the page we're going to.
+// We want to know this before talking to the policy delegate, since it affects whether
+// we show the DoYouReallyWantToRepost nag.
+//
+// This trick has a small bug (3123893) where we might find a cache hit, but then
+// have the item vanish when we try to use it in the ensuing nav.  This should be
+// extremely rare, but in that case the user will get an error on the navigation.
+if (ResourceHandle::willLoadFromCache(request, m_frame))
+action = NavigationAction(itemURL, loadType, false);
+else {
+request.setCachePolicy(ReloadIgnoringCacheData);
+action = NavigationAction(itemURL, NavigationTypeFormResubmitted);
+}
+} else {
+switch (loadType) {
+case FrameLoadTypeReload:
+case FrameLoadTypeReloadFromOrigin:
+request.setCachePolicy(ReloadIgnoringCacheData);
+break;
+case FrameLoadTypeBack:
+case FrameLoadTypeBackWMLDeckNotAccessible:
+case FrameLoadTypeForward:
+case FrameLoadTypeIndexedBackForward:
+// If the first load within a frame is a navigation within a back/forward list that was attached
+// without any of the items being loaded then we should use the default caching policy (<rdar://problem/8131355>).
+if (m_stateMachine.committedFirstRealDocumentLoad() && !itemURL.protocolIs("https"))
+request.setCachePolicy(ReturnCacheDataElseLoad);
+break;
+case FrameLoadTypeStandard:
+case FrameLoadTypeRedirectWithLockedBackForwardList:
+break;
+case FrameLoadTypeSame:
+default:
+ASSERT_NOT_REACHED();
+}
+action = NavigationAction(itemOriginalURL, loadType, false);
+}
+if (!addedExtraFields)
+addExtraFieldsToRequest(request, m_loadType, true, formData);
+loadWithNavigationAction(request, action, false, loadType, 0);
+}
+// Loads content into this frame, as specified by history item
+void FrameLoader::loadItem(HistoryItem* item, FrameLoadType loadType)
+{
+// We do same-document navigation in the following cases:
+// - The HistoryItem corresponds to the same document.
+// - The HistoryItem is not the same as the current item.
+HistoryItem* currentItem = history()->currentItem();
+bool sameDocumentNavigation = currentItem && item != currentItem
+&& item->documentSequenceNumber() == currentItem->documentSequenceNumber();
+#if ENABLE(WML)
+// All WML decks should go through the real load mechanism, not the scroll-to-anchor code
+// FIXME: Why do WML decks have this different behavior?
+// Are WML decks incompatible with HTML5 pushState/replaceState which require inter-document history navigations?
+// Should this new API be disabled for WML pages, or does WML need to update their mechanism to act like normal loads?
+// If scroll-to-anchor navigations were broken for WML and required them to have different loading behavior, then
+// state object loads are certainly also broken for them.
+if (frameContainsWMLContent(m_frame))
+sameDocumentNavigation = false;
+#endif
+if (sameDocumentNavigation)
+navigateWithinDocument(item);
+else
+navigateToDifferentDocument(item, loadType);
+}
+void FrameLoader::setMainDocumentError(DocumentLoader* loader, const ResourceError& error)
+{
+m_client->setMainDocumentError(loader, error);
+}
+void FrameLoader::mainReceivedCompleteError(DocumentLoader* loader, const ResourceError&)
+{
+loader->setPrimaryLoadComplete(true);
+m_client->dispatchDidLoadMainResource(activeDocumentLoader());
+checkCompleted();
+if (m_frame->page())
+checkLoadComplete();
+}
+void FrameLoader::mainReceivedError(const ResourceError& error, bool isComplete)
+{
+activeDocumentLoader()->mainReceivedError(error, isComplete);
+}
+ResourceError FrameLoader::cancelledError(const ResourceRequest& request) const
+{
+ResourceError error = m_client->cancelledError(request);
+error.setIsCancellation(true);
+return error;
+}
+ResourceError FrameLoader::blockedError(const ResourceRequest& request) const
+{
+return m_client->blockedError(request);
+}
+ResourceError FrameLoader::cannotShowURLError(const ResourceRequest& request) const
+{
+return m_client->cannotShowURLError(request);
+}
+ResourceError FrameLoader::fileDoesNotExistError(const ResourceResponse& response) const
+{
+return m_client->fileDoesNotExistError(response);
+}
+bool FrameLoader::shouldUseCredentialStorage(ResourceLoader* loader)
+{
+return m_client->shouldUseCredentialStorage(loader->documentLoader(), loader->identifier());
+}
+#if USE(PROTECTION_SPACE_AUTH_CALLBACK)
+bool FrameLoader::canAuthenticateAgainstProtectionSpace(ResourceLoader* loader, const ProtectionSpace& protectionSpace)
+{
+return m_client->canAuthenticateAgainstProtectionSpace(loader->documentLoader(), loader->identifier(), protectionSpace);
+}
+#endif
+void FrameLoader::setTitle(const String& title)
+{
+documentLoader()->setTitle(title);
+}
+void FrameLoader::setIconURL(const String& iconURL)
+{
+documentLoader()->setIconURL(iconURL);
+}
+KURL FrameLoader::originalRequestURL() const
+{
+return activeDocumentLoader()->originalRequest().url();
+}
+String FrameLoader::referrer() const
+{
+return m_documentLoader ? m_documentLoader->request().httpReferrer() : "";
+}
+void FrameLoader::dispatchDocumentElementAvailable()
+{
+m_frame->injectUserScripts(InjectAtDocumentStart);
+m_client->documentElementAvailable();
+}
+void FrameLoader::dispatchDidClearWindowObjectsInAllWorlds()
+{
+if (!m_frame->script()->canExecuteScripts(NotAboutToExecuteScript))
+return;
+Vector<DOMWrapperWorld*> worlds;
+ScriptController::getAllWorlds(worlds);
+for (size_t i = 0; i < worlds.size(); ++i)
+dispatchDidClearWindowObjectInWorld(worlds[i]);
+}
+void FrameLoader::dispatchDidClearWindowObjectInWorld(DOMWrapperWorld* world)
+{
+if (!m_frame->script()->canExecuteScripts(NotAboutToExecuteScript) || !m_frame->script()->existingWindowShell(world))
+return;
+m_client->dispatchDidClearWindowObjectInWorld(world);
+#if ENABLE(INSPECTOR)
+if (world != mainThreadNormalWorld())
+return;
+if (Page* page = m_frame->page()) {
+if (InspectorController* inspector = page->inspectorController())
+inspector->inspectedWindowScriptObjectCleared(m_frame);
+}
+#endif
+}
+void FrameLoader::updateSandboxFlags()
+{
+SandboxFlags flags = m_forcedSandboxFlags;
+if (Frame* parentFrame = m_frame->tree()->parent())
+flags |= parentFrame->loader()->sandboxFlags();
+if (HTMLFrameOwnerElement* ownerElement = m_frame->ownerElement())
+flags |= ownerElement->sandboxFlags();
+if (m_sandboxFlags == flags)
+return;
+m_sandboxFlags = flags;
+for (Frame* child = m_frame->tree()->firstChild(); child; child = child->tree()->nextSibling())
+child->loader()->updateSandboxFlags();
+}
+void FrameLoader::didChangeTitle(DocumentLoader* loader)
+{
+m_client->didChangeTitle(loader);
+if (loader == m_documentLoader) {
+// Must update the entries in the back-forward list too.
+history()->setCurrentItemTitle(loader->title());
+// This must go through the WebFrame because it has the right notion of the current b/f item.
+m_client->setTitle(loader->title(), loader->urlForHistory());
+m_client->setMainFrameDocumentReady(true); // update observers with new DOMDocument
+m_client->dispatchDidReceiveTitle(loader->title());
+}
+}
+void FrameLoader::didChangeIcons(DocumentLoader* loader)
+{
+if (loader == m_documentLoader)
+m_client->dispatchDidChangeIcons();
+}
+void FrameLoader::dispatchDidCommitLoad()
+{
+if (m_stateMachine.creatingInitialEmptyDocument())
+return;
+#ifndef NDEBUG
+m_didDispatchDidCommitLoad = true;
+#endif
+m_client->dispatchDidCommitLoad();
+#if ENABLE(INSPECTOR)
+if (Page* page = m_frame->page())
+page->inspectorController()->didCommitLoad(m_documentLoader.get());
+#endif
+}
+void FrameLoader::tellClientAboutPastMemoryCacheLoads()
+{
+ASSERT(m_frame->page());
+ASSERT(m_frame->page()->areMemoryCacheClientCallsEnabled());
+if (!m_documentLoader)
+return;
+Vector<String> pastLoads;
+m_documentLoader->takeMemoryCacheLoadsForClientNotification(pastLoads);
+size_t size = pastLoads.size();
+for (size_t i = 0; i < size; ++i) {
+CachedResource* resource = cache()->resourceForURL(pastLoads[i]);
+// FIXME: These loads, loaded from cache, but now gone from the cache by the time
+// Page::setMemoryCacheClientCallsEnabled(true) is called, will not be seen by the client.
+// Consider if there's some efficient way of remembering enough to deliver this client call.
+// We have the URL, but not the rest of the response or the length.
+if (!resource)
+continue;
+ResourceRequest request(resource->url());
+m_client->dispatchDidLoadResourceFromMemoryCache(m_documentLoader.get(), request, resource->response(), resource->encodedSize());
+}
+}
+bool FrameLoaderClient::hasHTMLView() const
+{
+return true;
+}
+} // namespace WebCore