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/*
* Copyright (C) 2006, 2007 Apple Inc. 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.
*/
#ifndef FrameLoader_h
#define FrameLoader_h
#include "CachedResource.h"
#include "CachePolicy.h"
#include "FormState.h"
#include "FrameLoaderTypes.h"
#include "KURL.h"
#include "StringHash.h"
#include "Timer.h"
#include <wtf/Forward.h>
#include <wtf/HashSet.h>
#include <wtf/HashMap.h>
#include <wtf/Noncopyable.h>
#include <wtf/OwnPtr.h>
#include <wtf/RefPtr.h>
#include "ResourceRequest.h"
#if USE(LOW_BANDWIDTH_DISPLAY)
#include "CachedResourceClient.h"
#endif
namespace KJS {
class JSValue;
}
namespace WebCore {
class AuthenticationChallenge;
class CachedPage;
class Document;
class DocumentLoader;
class Element;
class Event;
class FormData;
class Frame;
class FrameLoaderClient;
class HistoryItem;
class HTMLFormElement;
class HTMLFrameOwnerElement;
class IconLoader;
class IntSize;
class NavigationAction;
class Node;
class Page;
class RenderPart;
class ResourceError;
class ResourceLoader;
class ResourceRequest;
class ResourceResponse;
class SecurityOrigin;
class SharedBuffer;
class SubstituteData;
class TextResourceDecoder;
class Widget;
struct FormSubmission;
struct FrameLoadRequest;
struct ScheduledRedirection;
struct WindowFeatures;
bool isBackForwardLoadType(FrameLoadType);
typedef void (*NavigationPolicyDecisionFunction)(void* argument,
const ResourceRequest&, PassRefPtr<FormState>, bool shouldContinue);
typedef void (*NewWindowPolicyDecisionFunction)(void* argument,
const ResourceRequest&, PassRefPtr<FormState>, const String& frameName, bool shouldContinue);
typedef void (*ContentPolicyDecisionFunction)(void* argument, PolicyAction);
class PolicyCheck {
public:
PolicyCheck();
void clear();
void set(const ResourceRequest&, PassRefPtr<FormState>,
NavigationPolicyDecisionFunction, void* argument);
void set(const ResourceRequest&, PassRefPtr<FormState>, const String& frameName,
NewWindowPolicyDecisionFunction, void* argument);
void set(ContentPolicyDecisionFunction, void* argument);
const ResourceRequest& request() const { return m_request; }
void clearRequest();
void call(bool shouldContinue);
void call(PolicyAction);
void cancel();
private:
ResourceRequest m_request;
RefPtr<FormState> m_formState;
String m_frameName;
NavigationPolicyDecisionFunction m_navigationFunction;
NewWindowPolicyDecisionFunction m_newWindowFunction;
ContentPolicyDecisionFunction m_contentFunction;
void* m_argument;
};
class FrameLoader : Noncopyable
#if USE(LOW_BANDWIDTH_DISPLAY)
, private CachedResourceClient
#endif
{
public:
FrameLoader(Frame*, FrameLoaderClient*);
~FrameLoader();
void init();
Frame* frame() const { return m_frame; }
// FIXME: This is not cool, people.
void prepareForLoadStart();
void setupForReplace();
void setupForReplaceByMIMEType(const String& newMIMEType);
void finalSetupForReplace(DocumentLoader*);
void load(const KURL&, Event*);
void load(const FrameLoadRequest&, bool lockHistory, bool userGesture,
Event*, HTMLFormElement*, const HashMap<String, String>& formValues);
void load(const KURL&, const String& referrer, FrameLoadType, const String& target,
Event*, PassRefPtr<FormState>);
void post(const KURL&, const String& referrer, const String& target,
PassRefPtr<FormData>, const String& contentType,
Event*, HTMLFormElement*, const HashMap<String, String>& formValues);
void load(const ResourceRequest&);
void load(const ResourceRequest&, const SubstituteData&);
void load(const ResourceRequest&, const String& frameName);
void load(const ResourceRequest&, const NavigationAction&, FrameLoadType, PassRefPtr<FormState>);
void load(DocumentLoader*);
void load(DocumentLoader*, FrameLoadType, PassRefPtr<FormState>);
static bool canLoad(const KURL&, const String& referrer);
static bool canLoad(const KURL&, const Document*);
static bool canLoad(const CachedResource&, const Document*);
static void reportLocalLoadFailed(const Page*, const String& url);
static bool shouldHideReferrer(const KURL& url, const String& referrer);
Frame* createWindow(FrameLoader* frameLoaderForFrameLookup, const FrameLoadRequest&, const WindowFeatures&, bool& created);
void loadResourceSynchronously(const ResourceRequest&, ResourceError&, ResourceResponse&, Vector<char>& data);
bool canHandleRequest(const ResourceRequest&);
// Also not cool.
void stopAllLoaders();
void stopForUserCancel(bool deferCheckLoadComplete = false);
void cancelPendingArchiveLoad(ResourceLoader*);
bool isLoadingMainResource() const { return m_isLoadingMainResource; }
bool isLoading() const;
bool frameHasLoaded() const;
int numPendingOrLoadingRequests(bool recurse) const;
bool isReloading() const;
String referrer() const;
String outgoingReferrer() const;
void loadEmptyDocumentSynchronously();
DocumentLoader* activeDocumentLoader() const;
DocumentLoader* documentLoader() const;
DocumentLoader* provisionalDocumentLoader();
FrameState state() const;
static double timeOfLastCompletedLoad();
void didReceiveAuthenticationChallenge(ResourceLoader*, const AuthenticationChallenge&);
void didCancelAuthenticationChallenge(ResourceLoader*, const AuthenticationChallenge&);
void assignIdentifierToInitialRequest(unsigned long identifier, const ResourceRequest&);
void willSendRequest(ResourceLoader*, ResourceRequest&, const ResourceResponse& redirectResponse);
void didReceiveResponse(ResourceLoader*, const ResourceResponse&);
void didReceiveData(ResourceLoader*, const char*, int, int lengthReceived);
void didFinishLoad(ResourceLoader*);
void didFailToLoad(ResourceLoader*, const ResourceError&);
const ResourceRequest& originalRequest() const;
const ResourceRequest& initialRequest() const;
void receivedMainResourceError(const ResourceError&, bool isComplete);
void receivedData(const char*, int);
void handleFallbackContent();
bool isStopping() const;
void finishedLoading();
ResourceError cancelledError(const ResourceRequest&) const;
ResourceError fileDoesNotExistError(const ResourceResponse&) const;
ResourceError blockedError(const ResourceRequest&) const;
ResourceError cannotShowURLError(const ResourceRequest&) const;
bool willUseArchive(ResourceLoader*, const ResourceRequest&, const KURL&) const;
bool isArchiveLoadPending(ResourceLoader*) const;
void cannotShowMIMEType(const ResourceResponse&);
ResourceError interruptionForPolicyChangeError(const ResourceRequest&);
bool isHostedByObjectElement() const;
bool isLoadingMainFrame() const;
bool canShowMIMEType(const String& MIMEType) const;
bool representationExistsForURLScheme(const String& URLScheme);
String generatedMIMETypeForURLScheme(const String& URLScheme);
void notifyIconChanged();
void checkNavigationPolicy(const ResourceRequest&, NavigationPolicyDecisionFunction function, void* argument);
void checkContentPolicy(const String& MIMEType, ContentPolicyDecisionFunction, void* argument);
void cancelContentPolicyCheck();
void reload();
void reloadAllowingStaleData(const String& overrideEncoding);
void didReceiveServerRedirectForProvisionalLoadForFrame();
void finishedLoadingDocument(DocumentLoader*);
void committedLoad(DocumentLoader*, const char*, int);
bool isReplacing() const;
void setReplacing();
void revertToProvisional(DocumentLoader*);
void setMainDocumentError(DocumentLoader*, const ResourceError&);
void mainReceivedCompleteError(DocumentLoader*, const ResourceError&);
bool subframeIsLoading() const;
void willChangeTitle(DocumentLoader*);
void didChangeTitle(DocumentLoader*);
FrameLoadType loadType() const;
void didFirstLayout();
bool firstLayoutDone() const;
void clientRedirectCancelledOrFinished(bool cancelWithLoadInProgress);
void clientRedirected(const KURL&, double delay, double fireDate, bool lockHistory, bool isJavaScriptFormAction);
bool shouldReload(const KURL& currentURL, const KURL& destinationURL);
bool isQuickRedirectComing() const;
void sendRemainingDelegateMessages(unsigned long identifier, const ResourceResponse&, int length, const ResourceError&);
void requestFromDelegate(ResourceRequest&, unsigned long& identifier, ResourceError&);
void loadedResourceFromMemoryCache(const CachedResource*);
void recursiveCheckLoadComplete();
void checkLoadComplete();
void detachFromParent();
void detachChildren();
void addExtraFieldsToRequest(ResourceRequest&, bool isMainResource, bool alwaysFromRequest);
FrameLoaderClient* client() const;
void setDefersLoading(bool);
void changeLocation(const String& url, const String& referrer, bool lockHistory = true, bool userGesture = false);
void changeLocation(const KURL&, const String& referrer, bool lockHistory = true, bool userGesture = false);
void urlSelected(const ResourceRequest&, const String& target, Event*, bool lockHistory, bool userGesture);
void urlSelected(const FrameLoadRequest&, Event*, bool lockHistory, bool userGesture);
bool requestFrame(HTMLFrameOwnerElement*, const String& url, const AtomicString& frameName);
Frame* loadSubframe(HTMLFrameOwnerElement*, const KURL&, const String& name, const String& referrer);
void submitForm(const char* action, const String& url, PassRefPtr<FormData>, const String& target, const String& contentType, const String& boundary, Event*);
void submitFormAgain();
void submitForm(const FrameLoadRequest&, Event*);
void stop();
void stopLoading(bool sendUnload);
bool closeURL();
void didExplicitOpen();
KURL iconURL();
void commitIconURLToIconDatabase(const KURL&);
KURL baseURL() const;
String baseTarget() const;
KURL dataURLBaseFromRequest(const ResourceRequest& request) const;
bool isScheduledLocationChangePending() const { return m_scheduledRedirection && isLocationChange(*m_scheduledRedirection); }
void scheduleHTTPRedirection(double delay, const String& url);
void scheduleLocationChange(const String& url, const String& referrer, bool lockHistory = true, bool userGesture = false);
void scheduleRefresh(bool userGesture = false);
void scheduleHistoryNavigation(int steps);
bool canGoBackOrForward(int distance) const;
void goBackOrForward(int distance);
int getHistoryLength();
KURL historyURL(int distance);
void begin();
void begin(const KURL&, bool dispatchWindowObjectAvailable = true, SecurityOrigin* forcedSecurityOrigin = 0);
void write(const char* str, int len = -1, bool flush = false);
void write(const String&);
void end();
void endIfNotLoadingMainResource();
void setEncoding(const String& encoding, bool userChosen);
String encoding() const;
// Returns true if url is a JavaScript URL.
bool executeIfJavaScriptURL(const KURL& url, bool userGesture = false, bool replaceDocument = true);
KJS::JSValue* executeScript(const String& url, int baseLine, const String& script);
KJS::JSValue* executeScript(const String& script, bool forceUserGesture = false);
void gotoAnchor();
bool gotoAnchor(const String& name); // returns true if the anchor was found
void scrollToAnchor(const KURL&);
void tokenizerProcessedData();
void handledOnloadEvents();
String userAgent(const KURL&) const;
Widget* createJavaAppletWidget(const IntSize&, Element*, const HashMap<String, String>& args);
void dispatchWindowObjectAvailable();
void restoreDocumentState();
Frame* opener();
void setOpener(Frame*);
bool openedByDOM() const;
void setOpenedByDOM();
void provisionalLoadStarted();
bool userGestureHint();
void resetMultipleFormSubmissionProtection();
void didNotOpenURL(const KURL&);
void addData(const char* bytes, int length);
bool canCachePage();
void checkCallImplicitClose();
bool didOpenURL(const KURL&);
void frameDetached();
const KURL& url() const { return m_URL; }
void updateBaseURLForEmptyDocument();
void setResponseMIMEType(const String&);
const String& responseMIMEType() const;
bool containsPlugins() const;
void loadDone();
void finishedParsing();
void checkCompleted();
void scheduleCheckCompleted();
void scheduleCheckLoadComplete();
void clearRecordedFormValues();
void recordFormValue(const String& name, const String& value, PassRefPtr<HTMLFormElement>);
bool isComplete() const;
bool requestObject(RenderPart* frame, const String& url, const AtomicString& frameName,
const String& serviceType, const Vector<String>& paramNames, const Vector<String>& paramValues);
KURL completeURL(const String& url);
void didTellClientAboutLoad(const String& url);
bool haveToldClientAboutLoad(const String& url);
KURL originalRequestURL() const;
void cancelAndClear();
void setTitle(const String&);
bool shouldTreatURLAsSameAsCurrent(const KURL&) const;
void commitProvisionalLoad(PassRefPtr<CachedPage>);
void goToItem(HistoryItem*, FrameLoadType);
void saveDocumentAndScrollState();
void saveScrollPositionAndViewStateToItem(HistoryItem*);
// FIXME: These accessors are here for a dwindling number of users in WebKit, WebFrame
// being the primary one. After they're no longer needed there, they can be removed!
HistoryItem* currentHistoryItem();
HistoryItem* previousHistoryItem();
HistoryItem* provisionalHistoryItem();
void setCurrentHistoryItem(PassRefPtr<HistoryItem>);
void setPreviousHistoryItem(PassRefPtr<HistoryItem>);
void setProvisionalHistoryItem(PassRefPtr<HistoryItem>);
void continueLoadWithData(SharedBuffer*, const String& mimeType, const String& textEncoding, const KURL&);
static void registerURLSchemeAsLocal(const String& scheme);
static bool restrictAccessToLocal();
static void setRestrictAccessToLocal(bool);
static bool shouldTreatURLAsLocal(const String&);
static bool shouldTreatSchemeAsLocal(const String&);
#if USE(LOW_BANDWIDTH_DISPLAY)
bool addLowBandwidthDisplayRequest(CachedResource*);
void needToSwitchOutLowBandwidthDisplay() { m_needToSwitchOutLowBandwidthDisplay = true; }
// Client can control whether to use low bandwidth display on a per frame basis.
// However, this should only be used for the top frame, not sub-frame.
void setUseLowBandwidthDisplay(bool lowBandwidth) { m_useLowBandwidthDisplay = lowBandwidth; }
bool useLowBandwidthDisplay() const { return m_useLowBandwidthDisplay; }
#endif
bool committingFirstRealLoad() const { return !m_creatingInitialEmptyDocument && !m_committedFirstRealDocumentLoad; }
void iconLoadDecisionAvailable();
bool shouldAllowNavigation(Frame* targetFrame) const;
Frame* findFrameForNavigation(const AtomicString& name);
private:
PassRefPtr<HistoryItem> createHistoryItem(bool useOriginal);
PassRefPtr<HistoryItem> createHistoryItemTree(Frame* targetFrame, bool clipAtTarget);
void addBackForwardItemClippedAtTarget(bool doClip);
void restoreScrollPositionAndViewState();
void saveDocumentState();
void loadItem(HistoryItem*, FrameLoadType);
bool urlsMatchItem(HistoryItem*) const;
void invalidateCurrentItemCachedPage();
void recursiveGoToItem(HistoryItem*, HistoryItem*, FrameLoadType);
bool childFramesMatchItem(HistoryItem*) const;
void addHistoryForCurrentLocation();
void updateHistoryForBackForwardNavigation();
void updateHistoryForReload();
void updateHistoryForStandardLoad();
void updateHistoryForRedirectWithLockedHistory();
void updateHistoryForClientRedirect();
void updateHistoryForCommit();
void redirectionTimerFired(Timer<FrameLoader>*);
void checkCompletedTimerFired(Timer<FrameLoader>*);
void checkLoadCompleteTimerFired(Timer<FrameLoader>*);
void cancelRedirection(bool newLoadInProgress = false);
void started();
void completed();
void parentCompleted();
bool shouldUsePlugin(const KURL&, const String& mimeType, bool hasFallback, bool& useFallback);
bool loadPlugin(RenderPart*, const KURL&, const String& mimeType,
const Vector<String>& paramNames, const Vector<String>& paramValues, bool useFallback);
bool loadProvisionalItemFromCachedPage();
void cachePageForHistoryItem(HistoryItem*);
void receivedFirstData();
void updatePolicyBaseURL();
void setPolicyBaseURL(const String&);
// Also not cool.
void stopLoadingSubframes();
void clearProvisionalLoad();
void markLoadComplete();
void transitionToCommitted(PassRefPtr<CachedPage>);
void frameLoadCompleted();
void mainReceivedError(const ResourceError&, bool isComplete);
void setLoadType(FrameLoadType);
void checkNavigationPolicy(const ResourceRequest&, DocumentLoader*, PassRefPtr<FormState>,
NavigationPolicyDecisionFunction, void* argument);
void checkNewWindowPolicy(const NavigationAction&, const ResourceRequest&,
PassRefPtr<FormState>, const String& frameName);
void continueAfterNavigationPolicy(PolicyAction);
void continueAfterNewWindowPolicy(PolicyAction);
void continueAfterContentPolicy(PolicyAction);
void continueLoadAfterWillSubmitForm(PolicyAction = PolicyUse);
static void callContinueLoadAfterNavigationPolicy(void*, const ResourceRequest&, PassRefPtr<FormState>, bool shouldContinue);
void continueLoadAfterNavigationPolicy(const ResourceRequest&, PassRefPtr<FormState>, bool shouldContinue);
static void callContinueLoadAfterNewWindowPolicy(void*, const ResourceRequest&, PassRefPtr<FormState>, const String& frameName, bool shouldContinue);
void continueLoadAfterNewWindowPolicy(const ResourceRequest&, PassRefPtr<FormState>, const String& frameName, bool shouldContinue);
static void callContinueFragmentScrollAfterNavigationPolicy(void*, const ResourceRequest&, PassRefPtr<FormState>, bool shouldContinue);
void continueFragmentScrollAfterNavigationPolicy(const ResourceRequest&, bool shouldContinue);
void addHistoryItemForFragmentScroll();
void stopPolicyCheck();
void closeDocument();
void checkLoadCompleteForThisFrame();
void setDocumentLoader(DocumentLoader*);
void setPolicyDocumentLoader(DocumentLoader*);
void setProvisionalDocumentLoader(DocumentLoader*);
void setState(FrameState);
void closeOldDataSources();
void open(CachedPage&);
void opened();
void updateHistoryAfterClientRedirect();
void clear(bool clearWindowProperties = true, bool clearScriptObjects = true);
bool shouldReloadToHandleUnreachableURL(DocumentLoader*);
void handleUnimplementablePolicy(const ResourceError&);
void applyUserAgent(ResourceRequest& request);
void scheduleRedirection(ScheduledRedirection*);
void startRedirectionTimer();
void stopRedirectionTimer();
void startIconLoader();
#if USE(LOW_BANDWIDTH_DISPLAY)
// implementation of CachedResourceClient
virtual void notifyFinished(CachedResource*);
void removeAllLowBandwidthDisplayRequests();
void switchOutLowBandwidthDisplayIfReady();
#endif
void dispatchDidCommitLoad();
void dispatchAssignIdentifierToInitialRequest(unsigned long identifier, DocumentLoader*, const ResourceRequest&);
void dispatchWillSendRequest(DocumentLoader*, unsigned long identifier, ResourceRequest&, const ResourceResponse& redirectResponse);
void dispatchDidReceiveResponse(DocumentLoader*, unsigned long identifier, const ResourceResponse&);
void dispatchDidReceiveContentLength(DocumentLoader*, unsigned long identifier, int length);
void dispatchDidFinishLoading(DocumentLoader*, unsigned long identifier);
static bool isLocationChange(const ScheduledRedirection&);
Frame* m_frame;
FrameLoaderClient* m_client;
FrameState m_state;
FrameLoadType m_loadType;
RefPtr<DocumentLoader> m_documentLoader;
RefPtr<DocumentLoader> m_provisionalDocumentLoader;
RefPtr<DocumentLoader> m_policyDocumentLoader;
FrameLoadType m_policyLoadType;
PolicyCheck m_policyCheck;
bool m_delegateIsHandlingProvisionalLoadError;
bool m_delegateIsDecidingNavigationPolicy;
bool m_delegateIsHandlingUnimplementablePolicy;
bool m_firstLayoutDone;
bool m_quickRedirectComing;
bool m_sentRedirectNotification;
bool m_inStopAllLoaders;
bool m_navigationDuringLoad;
String m_outgoingReferrer;
CachePolicy m_cachePolicy;
HashSet<String> m_urlsClientKnowsAbout;
OwnPtr<FormSubmission> m_deferredFormSubmission;
bool m_isExecutingJavaScriptFormAction;
bool m_isRunningScript;
String m_responseMIMEType;
bool m_didCallImplicitClose;
bool m_wasUnloadEventEmitted;
bool m_isComplete;
bool m_isLoadingMainResource;
KURL m_URL;
KURL m_workingURL;
OwnPtr<IconLoader> m_iconLoader;
bool m_mayLoadIconLater;
bool m_cancellingWithLoadInProgress;
OwnPtr<ScheduledRedirection> m_scheduledRedirection;
bool m_needsClear;
bool m_receivedData;
bool m_encodingWasChosenByUser;
String m_encoding;
RefPtr<TextResourceDecoder> m_decoder;
bool m_containsPlugIns;
RefPtr<HTMLFormElement> m_formAboutToBeSubmitted;
HashMap<String, String> m_formValuesAboutToBeSubmitted;
KURL m_submittedFormURL;
Timer<FrameLoader> m_redirectionTimer;
Timer<FrameLoader> m_checkCompletedTimer;
Timer<FrameLoader> m_checkLoadCompleteTimer;
Frame* m_opener;
HashSet<Frame*> m_openedFrames;
bool m_openedByDOM;
bool m_creatingInitialEmptyDocument;
bool m_isDisplayingInitialEmptyDocument;
bool m_committedFirstRealDocumentLoad;
RefPtr<HistoryItem> m_currentHistoryItem;
RefPtr<HistoryItem> m_previousHistoryItem;
RefPtr<HistoryItem> m_provisionalHistoryItem;
bool m_didPerformFirstNavigation;
#ifndef NDEBUG
bool m_didDispatchDidCommitLoad;
#endif
#if USE(LOW_BANDWIDTH_DISPLAY)
// whether to use low bandwidth dislay, set by client
bool m_useLowBandwidthDisplay;
// whether to call finishParsing() in switchOutLowBandwidthDisplayIfReady()
bool m_finishedParsingDuringLowBandwidthDisplay;
// whether to call switchOutLowBandwidthDisplayIfReady;
// true if there is external css, javascript, or subframe/plugin
bool m_needToSwitchOutLowBandwidthDisplay;
String m_pendingSourceInLowBandwidthDisplay;
HashSet<CachedResource*> m_externalRequestsInLowBandwidthDisplay;
#endif
};
}
#endif