gecko/uriloader/prefetch/OfflineCacheUpdateGlue.cpp
2011-10-17 10:59:28 -04:00

235 lines
7.6 KiB
C++

/* -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Mozilla Corporation
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Honza Bambas <honzab@firemni.cz>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "OfflineCacheUpdateGlue.h"
#include "nsOfflineCacheUpdate.h"
#include "mozilla/Services.h"
#include "nsIApplicationCache.h"
#include "nsIApplicationCacheChannel.h"
#include "nsIApplicationCacheContainer.h"
#include "nsIChannel.h"
#include "nsIDocument.h"
#include "prlog.h"
#if defined(PR_LOGGING)
//
// To enable logging (see prlog.h for full details):
//
// set NSPR_LOG_MODULES=nsOfflineCacheUpdate:5
// set NSPR_LOG_FILE=offlineupdate.log
//
// this enables PR_LOG_ALWAYS level information and places all output in
// the file offlineupdate.log
//
extern PRLogModuleInfo *gOfflineCacheUpdateLog;
#endif
#define LOG(args) PR_LOG(gOfflineCacheUpdateLog, 4, args)
#define LOG_ENABLED() PR_LOG_TEST(gOfflineCacheUpdateLog, 4)
namespace mozilla {
namespace docshell {
//-----------------------------------------------------------------------------
// OfflineCacheUpdateGlue::nsISupports
//-----------------------------------------------------------------------------
NS_IMPL_ISUPPORTS3(OfflineCacheUpdateGlue,
nsIOfflineCacheUpdate,
nsIOfflineCacheUpdateObserver,
nsISupportsWeakReference)
//-----------------------------------------------------------------------------
// OfflineCacheUpdateGlue <public>
//-----------------------------------------------------------------------------
OfflineCacheUpdateGlue::OfflineCacheUpdateGlue()
{
LOG(("OfflineCacheUpdateGlue::OfflineCacheUpdateGlue [%p]", this));
}
OfflineCacheUpdateGlue::~OfflineCacheUpdateGlue()
{
LOG(("OfflineCacheUpdateGlue::~OfflineCacheUpdateGlue [%p]", this));
}
nsIOfflineCacheUpdate*
OfflineCacheUpdateGlue::EnsureUpdate()
{
if (!mUpdate) {
mUpdate = new nsOfflineCacheUpdate();
LOG(("OfflineCacheUpdateGlue [%p] is using update [%p]", this, mUpdate.get()));
}
return mUpdate;
}
NS_IMETHODIMP
OfflineCacheUpdateGlue::Schedule()
{
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
LOG(("Calling offline-cache-update-added"));
observerService->NotifyObservers(static_cast<nsIOfflineCacheUpdate*>(this),
"offline-cache-update-added",
nsnull);
LOG(("Done offline-cache-update-added"));
}
if (!EnsureUpdate())
return NS_ERROR_NULL_POINTER;
// Do not use weak reference, we must survive!
mUpdate->AddObserver(this, false);
return mUpdate->Schedule();
}
NS_IMETHODIMP
OfflineCacheUpdateGlue::Init(nsIURI *aManifestURI,
nsIURI *aDocumentURI,
nsIDOMDocument *aDocument)
{
if (!EnsureUpdate())
return NS_ERROR_NULL_POINTER;
mDocumentURI = aDocumentURI;
if (aDocument)
SetDocument(aDocument);
return mUpdate->Init(aManifestURI, aDocumentURI, nsnull);
}
void
OfflineCacheUpdateGlue::SetDocument(nsIDOMDocument *aDocument)
{
// The design is one document for one cache update on the content process.
NS_ASSERTION(!mDocument,
"Setting more then a single document on an instance of OfflineCacheUpdateGlue");
LOG(("Document %p added to update glue %p", aDocument, this));
// Add document only if it was not loaded from an offline cache.
// If it were loaded from an offline cache then it has already
// been associated with it and must not be again cached as
// implicit (which are the reasons we collect documents here).
nsCOMPtr<nsIDocument> document = do_QueryInterface(aDocument);
if (!document)
return;
nsIChannel* channel = document->GetChannel();
nsCOMPtr<nsIApplicationCacheChannel> appCacheChannel =
do_QueryInterface(channel);
if (!appCacheChannel)
return;
bool loadedFromAppCache;
appCacheChannel->GetLoadedFromApplicationCache(&loadedFromAppCache);
if (loadedFromAppCache)
return;
if (EnsureUpdate()) {
mUpdate->StickDocument(mDocumentURI);
}
mDocument = aDocument;
}
NS_IMETHODIMP
OfflineCacheUpdateGlue::UpdateStateChanged(nsIOfflineCacheUpdate *aUpdate, PRUint32 state)
{
if (state == nsIOfflineCacheUpdateObserver::STATE_FINISHED) {
LOG(("OfflineCacheUpdateGlue got STATE_FINISHED [%p]", this));
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
LOG(("Calling offline-cache-update-completed"));
observerService->NotifyObservers(static_cast<nsIOfflineCacheUpdate*>(this),
"offline-cache-update-completed",
nsnull);
LOG(("Done offline-cache-update-completed"));
}
aUpdate->RemoveObserver(this);
}
return NS_OK;
}
NS_IMETHODIMP
OfflineCacheUpdateGlue::ApplicationCacheAvailable(nsIApplicationCache *aApplicationCache)
{
NS_ENSURE_ARG(aApplicationCache);
// Check that the document that requested this update was
// previously associated with an application cache. If not, it
// should be associated with the new one.
nsCOMPtr<nsIApplicationCacheContainer> container =
do_QueryInterface(mDocument);
if (!container)
return NS_OK;
nsCOMPtr<nsIApplicationCache> existingCache;
nsresult rv = container->GetApplicationCache(getter_AddRefs(existingCache));
NS_ENSURE_SUCCESS(rv, rv);
if (!existingCache) {
#if defined(PR_LOGGING)
if (LOG_ENABLED()) {
nsCAutoString clientID;
if (aApplicationCache) {
aApplicationCache->GetClientID(clientID);
}
LOG(("Update %p: associating app cache %s to document %p",
this, clientID.get(), mDocument.get()));
}
#endif
rv = container->SetApplicationCache(aApplicationCache);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
}
}