frameloader.cpp

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
 * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
 * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
 *
 * 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 "Archive.h"
#include "ArchiveFactory.h"
#include "CString.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 "Frame.h"
#include "FrameLoadRequest.h"
#include "FrameLoaderClient.h"
#include "FrameTree.h"
#include "FrameView.h"
#include "HTMLAnchorElement.h"
#include "HTMLFormElement.h"
#include "HTMLFrameElement.h"
#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 "PluginData.h"
#include "PluginDocument.h"
#include "ProgressTracker.h"
#include "RenderPart.h"
#include "RenderView.h"
#include "RenderWidget.h"
#include "ResourceHandle.h"
#include "ResourceRequest.h"
#include "ScriptController.h"
#include "ScriptSourceCode.h"
#include "ScriptValue.h"
#include "SecurityOrigin.h"
#include "SegmentedString.h"
#include "Settings.h"
#include "TextResourceDecoder.h"
#include "WindowFeatures.h"
#include "XMLHttpRequest.h"
#include "XMLTokenizer.h"
#include <wtf/CurrentTime.h>
#include <wtf/StdLibExtras.h>

#if ENABLE(OFFLINE_WEB_APPLICATIONS)
#include "ApplicationCache.h"
#include "ApplicationCacheResource.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 {

#if ENABLE(SVG)
using namespace SVGNames;
#endif
using namespace HTMLNames;

typedef HashSet<String, CaseFoldingHash> LocalSchemesMap;

struct FormSubmission {
    FormSubmission(const char* action, const String& url, PassRefPtr<FormData> formData,
                   const String& target, const String& contentType, const String& boundary,
                   PassRefPtr<Event> event, bool lockHistory, bool lockBackForwardList)
        : action(action)
        , url(url)
        , formData(formData)
        , target(target)
        , contentType(contentType)
        , boundary(boundary)
        , event(event)
        , lockHistory(lockHistory)
        , lockBackForwardList(lockBackForwardList)
    {
    }

    const char* action;
    String url;
    RefPtr<FormData> formData;
    String target;
    String contentType;
    String boundary;
    RefPtr<Event> event;
    bool lockHistory;
    bool lockBackForwardList;
};

struct ScheduledRedirection {
    enum Type { redirection, locationChange, historyNavigation, locationChangeDuringLoad };

    const Type type;
    const double delay;
    const String url;
    const String referrer;
    const int historySteps;
    const bool lockHistory;
    const bool lockBackForwardList;
    const bool wasUserGesture;
    const bool wasRefresh;

    ScheduledRedirection(double delay, const String& url, bool lockHistory, bool lockBackForwardList, bool wasUserGesture, bool refresh)
        : type(redirection)
        , delay(delay)
        , url(url)
        , historySteps(0)
        , lockHistory(lockHistory)
        , lockBackForwardList(lockBackForwardList)
        , wasUserGesture(wasUserGesture)
        , wasRefresh(refresh)
    {
        ASSERT(!url.isEmpty());
    }

    ScheduledRedirection(Type locationChangeType, const String& url, const String& referrer, bool lockHistory, bool lockBackForwardList, bool wasUserGesture, bool refresh)
        : type(locationChangeType)
        , delay(0)
        , url(url)
        , referrer(referrer)
        , historySteps(0)
        , lockHistory(lockHistory)
        , lockBackForwardList(lockBackForwardList)
        , wasUserGesture(wasUserGesture)
        , wasRefresh(refresh)
    {
        ASSERT(locationChangeType == locationChange || locationChangeType == locationChangeDuringLoad);
        ASSERT(!url.isEmpty());
    }

    explicit ScheduledRedirection(int historyNavigationSteps)
        : type(historyNavigation)
        , delay(0)
        , historySteps(historyNavigationSteps)
        , lockHistory(false)
        , lockBackForwardList(false)
        , wasUserGesture(false)
        , wasRefresh(false)
    {
    }
};

static double storedTimeOfLastCompletedLoad;
static FrameLoader::LocalLoadPolicy localLoadPolicy = FrameLoader::AllowLocalLoadsForLocalOnly;

bool isBackForwardLoadType(FrameLoadType type)
{
    switch (type) {
        case FrameLoadTypeStandard:
        case FrameLoadTypeReload:
        case FrameLoadTypeReloadFromOrigin:
        case FrameLoadTypeSame:
        case FrameLoadTypeRedirectWithLockedBackForwardList:
        case FrameLoadTypeReplace:
            return false;
        case FrameLoadTypeBack:
        case FrameLoadTypeForward:
        case FrameLoadTypeIndexedBackForward:
            return true;
    }
    ASSERT_NOT_REACHED();
    return false;
}

static int numRequests(Document* document)
{
    if (!document)
        return 0;
    
    return document->docLoader()->requestCount();
}

FrameLoader::FrameLoader(Frame* frame, FrameLoaderClient* client)
    : m_frame(frame)
    , m_client(client)
    , m_state(FrameStateCommittedPage)
    , m_loadType(FrameLoadTypeStandard)
    , m_policyLoadType(FrameLoadTypeStandard)
    , m_delegateIsHandlingProvisionalLoadError(false)
    , m_delegateIsDecidingNavigationPolicy(false)
    , m_delegateIsHandlingUnimplementablePolicy(false)
    , m_firstLayoutDone(false)
    , m_quickRedirectComing(false)
    , m_sentRedirectNotification(false)
    , m_inStopAllLoaders(false)
    , m_navigationDuringLoad(false)
    , m_isExecutingJavaScriptFormAction(false)
    , m_isRunningScript(false)
    , m_didCallImplicitClose(false)
    , m_wasUnloadEventEmitted(false)
    , m_isComplete(false)
    , m_isLoadingMainResource(false)
    , m_cancellingWithLoadInProgress(false)
    , m_needsClear(false)
    , m_receivedData(false)
    , m_encodingWasChosenByUser(false)
    , m_containsPlugIns(false)
    , m_redirectionTimer(this, &FrameLoader::redirectionTimerFired)
    , m_checkCompletedTimer(this, &FrameLoader::checkCompletedTimerFired)
    , m_checkLoadCompleteTimer(this, &FrameLoader::checkLoadCompleteTimerFired)
    , m_opener(0)
    , m_openedByDOM(false)
    , m_creatingInitialEmptyDocument(false)
    , m_isDisplayingInitialEmptyDocument(false)
    , m_committedFirstRealDocumentLoad(false)
    , m_didPerformFirstNavigation(false)
#ifndef NDEBUG
    , m_didDispatchDidCommitLoad(false)
#endif
#if ENABLE(WML)
    , m_forceReloadWmlDeck(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()
{
    // this somewhat odd set of steps is needed to give the frame an initial empty document
    m_isDisplayingInitialEmptyDocument = false;
    m_creatingInitialEmptyDocument = true;
    setPolicyDocumentLoader(m_client->createDocumentLoader(ResourceRequest(KURL("")), SubstituteData()).get());
    setProvisionalDocumentLoader(m_policyDocumentLoader.get());
    setState(FrameStateProvisional);
    m_provisionalDocumentLoader->setResponse(ResourceResponse(KURL(), "text/html", 0, String(), String()));
    m_provisionalDocumentLoader->finishedLoading();
    begin(KURL(), false);
    end();
    m_frame->document()->cancelParsing();
    m_creatingInitialEmptyDocument = false;
    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);
}

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()->loadFrameRequestWithFormAndValues(request, false, false, 0, 0, HashMap<String, String>());
            if (Page* page = frame->page())
                page->chrome()->focus();
            created = false;
            return frame;
        }
    }
    
    // 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 String& url, const String& referrer, bool lockHistory, bool lockBackForwardList, bool userGesture, bool refresh)
{
    changeLocation(completeURL(url), referrer, lockHistory, lockBackForwardList, userGesture, refresh);
}

void FrameLoader::changeLocation(const KURL& url, const String& referrer, bool lockHistory, bool lockBackForwardList, bool userGesture, bool refresh)
{
    RefPtr<Frame> protect(m_frame);