mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
119 lines
4.4 KiB
C++
119 lines
4.4 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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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 "nsIFile.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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// nsIFile::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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// Remove the directory recursively.
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tmpDir->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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