documentloader.cpp

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    }
    return frameLoader()->subframeIsLoading();
}

void DocumentLoader::addAllArchiveResources(Archive* archive)
{
    if (!m_archiveResourceCollection)
        m_archiveResourceCollection.set(new ArchiveResourceCollection);
        
    ASSERT(archive);
    if (!archive)
        return;
        
    m_archiveResourceCollection->addAllResources(archive);
}

// FIXME: Adding a resource directly to a DocumentLoader/ArchiveResourceCollection seems like bad design, but is API some apps rely on.
// Can we change the design in a manner that will let us deprecate that API without reducing functionality of those apps?
void DocumentLoader::addArchiveResource(PassRefPtr<ArchiveResource> resource)
{
    if (!m_archiveResourceCollection)
        m_archiveResourceCollection.set(new ArchiveResourceCollection);
        
    ASSERT(resource);
    if (!resource)
        return;
        
    m_archiveResourceCollection->addResource(resource);
}

ArchiveResource* DocumentLoader::archiveResourceForURL(const KURL& url) const
{
    if (!m_archiveResourceCollection)
        return 0;
        
    ArchiveResource* resource = m_archiveResourceCollection->archiveResourceForURL(url);

    return resource && !resource->shouldIgnoreWhenUnarchiving() ? resource : 0;
}

PassRefPtr<Archive> DocumentLoader::popArchiveForSubframe(const String& frameName)
{
    return m_archiveResourceCollection ? m_archiveResourceCollection->popSubframeArchive(frameName) : 0;
}

void DocumentLoader::clearArchiveResources()
{
    m_archiveResourceCollection.clear();
    m_substituteResourceDeliveryTimer.stop();
}

void DocumentLoader::setParsedArchiveData(PassRefPtr<SharedBuffer> data)
{
    m_parsedArchiveData = data;
}

SharedBuffer* DocumentLoader::parsedArchiveData() const
{
    return m_parsedArchiveData.get();
}

PassRefPtr<ArchiveResource> DocumentLoader::mainResource() const
{
    const ResourceResponse& r = response();
    RefPtr<SharedBuffer> mainResourceBuffer = mainResourceData();
    if (!mainResourceBuffer)
        mainResourceBuffer = SharedBuffer::create();
        
    return ArchiveResource::create(mainResourceBuffer, r.url(), r.mimeType(), r.textEncodingName(), frame()->tree()->name());
}

PassRefPtr<ArchiveResource> DocumentLoader::subresource(const KURL& url) const
{
    if (!isCommitted())
        return 0;
    
    Document* doc = m_frame->document();
        
    CachedResource* resource = doc->docLoader()->cachedResource(url);
    if (!resource || resource->preloadResult() == CachedResource::PreloadReferenced)
        return archiveResourceForURL(url);
        
    return ArchiveResource::create(resource->data(), url, resource->response());
}

void DocumentLoader::getSubresources(Vector<PassRefPtr<ArchiveResource> >& subresources) const
{
    if (!isCommitted())
        return;

    Document* document = m_frame->document();

    const DocLoader::DocumentResourceMap& allResources = document->docLoader()->allCachedResources();
    DocLoader::DocumentResourceMap::const_iterator end = allResources.end();
    for (DocLoader::DocumentResourceMap::const_iterator it = allResources.begin(); it != end; ++it) {
        RefPtr<ArchiveResource> subresource = this->subresource(KURL(it->second->url()));
        if (subresource)
            subresources.append(subresource.release());
    }

    return;
}

void DocumentLoader::deliverSubstituteResourcesAfterDelay()
{
    if (m_pendingSubstituteResources.isEmpty())
        return;
    ASSERT(m_frame && m_frame->page());
    if (m_frame->page()->defersLoading())
        return;
    if (!m_substituteResourceDeliveryTimer.isActive())
        m_substituteResourceDeliveryTimer.startOneShot(0);
}

void DocumentLoader::substituteResourceDeliveryTimerFired(Timer<DocumentLoader>*)
{
    if (m_pendingSubstituteResources.isEmpty())
        return;
    ASSERT(m_frame && m_frame->page());
    if (m_frame->page()->defersLoading())
        return;

    SubstituteResourceMap copy;
    copy.swap(m_pendingSubstituteResources);

    SubstituteResourceMap::const_iterator end = copy.end();
    for (SubstituteResourceMap::const_iterator it = copy.begin(); it != end; ++it) {
        RefPtr<ResourceLoader> loader = it->first;
        SubstituteResource* resource = it->second.get();
        
        if (resource) {
            SharedBuffer* data = resource->data();
        
            loader->didReceiveResponse(resource->response());
            loader->didReceiveData(data->data(), data->size(), data->size(), true);
            loader->didFinishLoading();
        } else {
            // A null resource means that we should fail the load.
            // FIXME: Maybe we should use another error here - something like "not in cache".
            loader->didFail(loader->cannotShowURLError());
        }
    }
}

#ifndef NDEBUG
bool DocumentLoader::isSubstituteLoadPending(ResourceLoader* loader) const
{
    return m_pendingSubstituteResources.contains(loader);
}
#endif

void DocumentLoader::cancelPendingSubstituteLoad(ResourceLoader* loader)
{
    if (m_pendingSubstituteResources.isEmpty())
        return;
    m_pendingSubstituteResources.remove(loader);
    if (m_pendingSubstituteResources.isEmpty())
        m_substituteResourceDeliveryTimer.stop();
}

bool DocumentLoader::scheduleArchiveLoad(ResourceLoader* loader, const ResourceRequest& request, const KURL& originalURL)
{
    ArchiveResource* resource = 0;
    
    if (request.url() == originalURL)
        resource = archiveResourceForURL(originalURL);

    if (!resource) {
        // WebArchiveDebugMode means we fail loads instead of trying to fetch them from the network if they're not in the archive.
        bool shouldFailLoad = m_frame->settings()->webArchiveDebugModeEnabled() && ArchiveFactory::isArchiveMimeType(responseMIMEType());

        if (!shouldFailLoad)
            return false;
    }
    
    m_pendingSubstituteResources.set(loader, resource);
    deliverSubstituteResourcesAfterDelay();
    
    return true;
}

void DocumentLoader::addResponse(const ResourceResponse& r)
{
    if (!m_stopRecordingResponses)
        m_responses.append(r);
}

void DocumentLoader::stopRecordingResponses()
{
    m_stopRecordingResponses = true;
}

void DocumentLoader::setTitle(const String& title)
{
    if (title.isEmpty())
        return;

    String trimmed = canonicalizedTitle(title, m_frame);
    if (!trimmed.isEmpty() && m_pageTitle != trimmed) {
        frameLoader()->willChangeTitle(this);
        m_pageTitle = trimmed;
        frameLoader()->didChangeTitle(this);
    }
}

KURL DocumentLoader::urlForHistory() const
{
    // Return the URL to be used for history and B/F list.
    // Returns nil for WebDataProtocol URLs that aren't alternates 
    // for unreachable URLs, because these can't be stored in history.
    if (m_substituteData.isValid())
        return unreachableURL();

    return m_originalRequestCopy.url();
}

bool DocumentLoader::urlForHistoryReflectsFailure() const
{
    return m_substituteData.isValid() || m_response.httpStatusCode() >= 400;
}

void DocumentLoader::loadFromCachedPage(PassRefPtr<CachedPage> cachedPage)
{
    LOG(PageCache, "WebCorePageCache: DocumentLoader %p loading from cached page %p", this, cachedPage.get());
    
    prepareForLoadStart();
    setLoadingFromCachedPage(true);
    setCommitted(true);
    frameLoader()->commitProvisionalLoad(cachedPage);
}

const KURL& DocumentLoader::originalURL() const
{
    return m_originalRequestCopy.url();
}

const KURL& DocumentLoader::requestURL() const
{
    return request().url();
}

const KURL& DocumentLoader::responseURL() const
{
    return m_response.url();
}

const String& DocumentLoader::responseMIMEType() const
{
    return m_response.mimeType();
}

const KURL& DocumentLoader::unreachableURL() const
{
    return m_substituteData.failingURL();
}

void DocumentLoader::setDefersLoading(bool defers)
{
    if (m_mainResourceLoader)
        m_mainResourceLoader->setDefersLoading(defers);
    setAllDefersLoading(m_subresourceLoaders, defers);
    setAllDefersLoading(m_plugInStreamLoaders, defers);
    if (!defers)
        deliverSubstituteResourcesAfterDelay();
}

void DocumentLoader::stopLoadingPlugIns()
{
    cancelAll(m_plugInStreamLoaders);
}

void DocumentLoader::stopLoadingSubresources()
{
    cancelAll(m_subresourceLoaders);
}

void DocumentLoader::addSubresourceLoader(ResourceLoader* loader)
{
    m_subresourceLoaders.add(loader);
    setLoading(true);
}

void DocumentLoader::removeSubresourceLoader(ResourceLoader* loader)
{
    m_subresourceLoaders.remove(loader);
    updateLoading();
    if (Frame* frame = m_frame)
        frame->loader()->checkLoadComplete();
}

void DocumentLoader::addPlugInStreamLoader(ResourceLoader* loader)
{
    m_plugInStreamLoaders.add(loader);
    setLoading(true);
}

void DocumentLoader::removePlugInStreamLoader(ResourceLoader* loader)
{
    m_plugInStreamLoaders.remove(loader);
    updateLoading();
}

bool DocumentLoader::isLoadingMainResource() const
{
    return !!m_mainResourceLoader;
}

bool DocumentLoader::isLoadingSubresources() const
{
    return !m_subresourceLoaders.isEmpty();
}

bool DocumentLoader::isLoadingPlugIns() const
{
    return !m_plugInStreamLoaders.isEmpty();
}

bool DocumentLoader::isLoadingMultipartContent() const
{
    return m_mainResourceLoader && m_mainResourceLoader->isLoadingMultipartContent();
}

bool DocumentLoader::startLoadingMainResource(unsigned long identifier)
{
    ASSERT(!m_mainResourceLoader);
    m_mainResourceLoader = MainResourceLoader::create(m_frame);
    m_mainResourceLoader->setIdentifier(identifier);

    // FIXME: Is there any way the extra fields could have not been added by now?
    // If not, it would be great to remove this line of code.
    frameLoader()->addExtraFieldsToMainResourceRequest(m_request);

    if (!m_mainResourceLoader->load(m_request, m_substituteData)) {
        // FIXME: If this should really be caught, we should just ASSERT this doesn't happen;
        // should it be caught by other parts of WebKit or other parts of the app?
        LOG_ERROR("could not create WebResourceHandle for URL %s -- should be caught by policy handler level", m_request.url().string().ascii().data());
        m_mainResourceLoader = 0;
        return false;
    }

    return true;
}

void DocumentLoader::cancelMainResourceLoad(const ResourceError& error)
{
    m_mainResourceLoader->cancel(error);
}

void DocumentLoader::subresourceLoaderFinishedLoadingOnePart(ResourceLoader* loader)
{
    m_multipartSubresourceLoaders.add(loader);
    m_subresourceLoaders.remove(loader);
    updateLoading();
    if (Frame* frame = m_frame)
        frame->loader()->checkLoadComplete();    
}

void DocumentLoader::iconLoadDecisionAvailable()
{
    if (m_frame)
        m_frame->loader()->iconLoadDecisionAvailable();
}

#if ENABLE(OFFLINE_WEB_APPLICATIONS)
void DocumentLoader::setCandidateApplicationCacheGroup(ApplicationCacheGroup* group)
{
    ASSERT(!m_applicationCache);
    m_candidateApplicationCacheGroup = group;
}
    
void DocumentLoader::setApplicationCache(PassRefPtr<ApplicationCache> applicationCache)
{
    if (m_candidateApplicationCacheGroup) {
        ASSERT(!m_applicationCache);
        m_candidateApplicationCacheGroup = 0;
    }

    m_applicationCache = applicationCache;
}

ApplicationCache* DocumentLoader::mainResourceApplicationCache() const
{
    if (m_mainResourceApplicationCache)
        return m_mainResourceApplicationCache.get();
    if (m_mainResourceLoader)
        return m_mainResourceLoader->applicationCache();
    return 0;
}

bool DocumentLoader::shouldLoadResourceFromApplicationCache(const ResourceRequest& request, ApplicationCacheResource*& resource)
{
    ApplicationCache* cache = applicationCache();
    if (!cache || !cache->isComplete())
        return false;

    // If the resource is not a HTTP/HTTPS GET, then abort
    if (!ApplicationCache::requestIsHTTPOrHTTPSGet(request))
        return false;

    // If the resource's URL is an master entry, the manifest, an explicit entry, a fallback entry, or a dynamic entry
    // in the application cache, then get the resource from the cache (instead of fetching it).
    resource = cache->resourceForURL(request.url());

    // Resources that match fallback namespaces or online whitelist entries are fetched from the network,
    // unless they are also cached.
    if (!resource && (cache->urlMatchesFallbackNamespace(request.url()) || cache->isURLInOnlineWhitelist(request.url())))
        return false;

    // Resources that are not present in the manifest will always fail to load (at least, after the
    // cache has been primed the first time), making the testing of offline applications simpler.
    return true;
}

bool DocumentLoader::getApplicationCacheFallbackResource(const ResourceRequest& request, ApplicationCacheResource*& resource, ApplicationCache* cache)
{
    if (!cache) {
        cache = applicationCache();
        if (!cache)
            return false;
    }
    if (!cache->isComplete())
        return false;
    
    // If the resource is not a HTTP/HTTPS GET, then abort
    if (!ApplicationCache::requestIsHTTPOrHTTPSGet(request))
        return false;

    KURL fallbackURL;
    if (!cache->urlMatchesFallbackNamespace(request.url(), &fallbackURL))
        return false;

    resource = cache->resourceForURL(fallbackURL);
    ASSERT(resource);

    return true;
}

bool DocumentLoader::scheduleApplicationCacheLoad(ResourceLoader* loader, const ResourceRequest& request, const KURL& originalURL)
{
    if (!frameLoader()->frame()->settings() || !frameLoader()->frame()->settings()->offlineWebApplicationCacheEnabled())
        return false;
    
    if (request.url() != originalURL)
        return false;

    ApplicationCacheResource* resource;
    if (!shouldLoadResourceFromApplicationCache(request, resource))
        return false;
    
    m_pendingSubstituteResources.set(loader, resource);
    deliverSubstituteResourcesAfterDelay();
        
    return true;
}

bool DocumentLoader::scheduleLoadFallbackResourceFromApplicationCache(ResourceLoader* loader, const ResourceRequest& request, ApplicationCache* cache)
{
    if (!frameLoader()->frame()->settings() || !frameLoader()->frame()->settings()->offlineWebApplicationCacheEnabled())
        return false;

    ApplicationCacheResource* resource;
    if (!getApplicationCacheFallbackResource(request, resource, cache))
        return false;

    m_pendingSubstituteResources.set(loader, resource);
    deliverSubstituteResourcesAfterDelay();
        
    return true;
}

#endif // ENABLE(OFFLINE_WEB_APPLICATIONS)

}