зеркало из https://github.com/mozilla/pjs.git
156 строки
5.9 KiB
C++
156 строки
5.9 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla code.
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*
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* The Initial Developer of the Original Code is
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* the Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Chris Pearce <chris@pearce.org.nz>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef XP_WIN
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#error nsMediaCacheRemover only needed on Windows.
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#endif
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#include "nsIObserver.h"
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#include "nsIIdleService.h"
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#include "nsISimpleEnumerator.h"
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#include "nsILocalFile.h"
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#include "nsAppDirectoryServiceDefs.h"
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#include "nsDirectoryServiceDefs.h"
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#include "nsXULAppAPI.h"
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#include "nsString.h"
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#include "nsAutoPtr.h"
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#include "nsITimer.h"
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// Duration of idle time before we'll get a callback whereupon we attempt to
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// remove any stray and unused media cache temp files.
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#define TEMP_FILE_IDLE_TIME 30
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// The nsMediaCacheRemover is created in a timer, which sets an idle observer.
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// This is expiration time (in ms) which initial timer is set for (3 minutes).
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#define SCHEDULE_TIMEOUT 3 * 60 * 1000
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// This class adds itself as an idle observer. When the application has
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// been idle for about 30 seconds we'll get a notification, whereupon we'll
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// attempt to delete ${TempDir}/mozilla-media-cache/. This is to ensure all
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// media cache temp files which were supposed to be deleted on application
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// exit were actually deleted as they may not be if we previously crashed.
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// See bug 572579. This is only needed on some versions of Windows,
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// nsILocalFile::DELETE_ON_CLOSE works on other platforms.
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class nsMediaCacheRemover : public nsIObserver {
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public:
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NS_DECL_ISUPPORTS
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nsMediaCacheRemover() {
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MOZ_COUNT_CTOR(nsMediaCacheRemover);
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}
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~nsMediaCacheRemover() {
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MOZ_COUNT_DTOR(nsMediaCacheRemover);
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}
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NS_IMETHODIMP Observe(nsISupports *subject,
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const char *topic,
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const PRUnichar *data)
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{
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if (strcmp(topic, "idle") == 0) {
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// The user has been idle for a while, clean up the temp files.
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// The idle service will drop its reference to this object after
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// we exit, destroying this object.
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RemoveMediaCacheFiles();
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}
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return NS_OK;
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}
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nsresult RegisterIdleObserver() {
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// Add this as an idle observer. When we've been idle for
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// TEMP_FILE_IDLE_TIME seconds, we'll get a notification, and we'll then
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// try to delete any stray media cache temp files.
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nsCOMPtr<nsIIdleService> idleSvc =
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do_GetService("@mozilla.org/widget/idleservice;1");
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if (!idleSvc)
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return NS_ERROR_FAILURE;
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return idleSvc->AddIdleObserver(this, TEMP_FILE_IDLE_TIME);
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}
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void RemoveMediaCacheFiles() {
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nsCOMPtr<nsIIdleService> idleSvc =
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do_GetService("@mozilla.org/widget/idleservice;1");
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if (idleSvc)
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idleSvc->RemoveIdleObserver(this, TEMP_FILE_IDLE_TIME);
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nsCOMPtr<nsIFile> tmpDir;
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nsresult rv = NS_GetSpecialDirectory(NS_APP_USER_PROFILE_LOCAL_50_DIR,
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getter_AddRefs(tmpDir));
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if (NS_FAILED(rv))
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return;
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NS_ABORT_IF_FALSE(XRE_GetProcessType() == GeckoProcessType_Default,
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"Need to update media cache file location");
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rv = tmpDir->AppendNative(nsDependentCString("mozilla-media-cache"));
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if (NS_FAILED(rv))
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return;
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nsCOMPtr<nsILocalFile> tmpFile = do_QueryInterface(tmpDir);
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if (!tmpFile)
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return;
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// Remove the directory recursively.
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tmpFile->Remove(true);
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}
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};
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NS_IMPL_ISUPPORTS1(nsMediaCacheRemover, nsIObserver)
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void CreateMediaCacheRemover(nsITimer* aTimer, void* aClosure) {
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// Create a new nsMediaCacheRemover, and register it as an idle observer.
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// If it is successfully registered as an idle observer, its owning reference
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// will be held by the idle service, otherwise it will be destroyed by the
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// refptr here when it goes out of scope.
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nsRefPtr<nsMediaCacheRemover> t = new nsMediaCacheRemover();
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t->RegisterIdleObserver();
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}
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nsresult ScheduleMediaCacheRemover() {
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// We create the nsMediaCacheRemover in a timer, so that the app has enough
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// time to start up before we add the idle observer. If we register the
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// idle observer too early, it will be registered before the fake idle
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// service is installed when running in xpcshell, and this interferes with
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// the fake idle service, causing xpcshell-test failures.
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nsCOMPtr<nsITimer> t = do_CreateInstance(NS_TIMER_CONTRACTID);
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nsresult res = t->InitWithFuncCallback(CreateMediaCacheRemover,
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0,
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SCHEDULE_TIMEOUT,
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nsITimer::TYPE_ONE_SHOT);
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return res;
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}
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