зеркало из https://github.com/mozilla/gecko-dev.git
105 строки
2.6 KiB
C++
105 строки
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* 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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//
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// Eric Vaughan
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// Netscape Communications
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//
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// See documentation in associated header file
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//
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#include "nsRepeatService.h"
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#include "mozilla/StaticPtr.h"
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#include "nsIDocument.h"
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#include "nsIServiceManager.h"
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using namespace mozilla;
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static StaticAutoPtr<nsRepeatService> gRepeatService;
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nsRepeatService::nsRepeatService()
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: mCallback(nullptr), mCallbackData(nullptr)
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{
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}
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nsRepeatService::~nsRepeatService()
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{
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NS_ASSERTION(!mCallback && !mCallbackData, "Callback was not removed before shutdown");
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}
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/* static */ nsRepeatService*
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nsRepeatService::GetInstance()
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{
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if (!gRepeatService) {
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gRepeatService = new nsRepeatService();
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}
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return gRepeatService;
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}
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/*static*/ void
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nsRepeatService::Shutdown()
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{
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gRepeatService = nullptr;
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}
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void
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nsRepeatService::Start(Callback aCallback, void* aCallbackData,
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nsIDocument* aDocument, const nsACString& aCallbackName,
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uint32_t aInitialDelay)
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{
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NS_PRECONDITION(aCallback != nullptr, "null ptr");
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mCallback = aCallback;
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mCallbackData = aCallbackData;
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mCallbackName = aCallbackName;
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nsresult rv;
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mRepeatTimer = do_CreateInstance("@mozilla.org/timer;1", &rv);
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if (NS_SUCCEEDED(rv)) {
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mRepeatTimer->SetTarget(aDocument->EventTargetFor(TaskCategory::Other));
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InitTimerCallback(aInitialDelay);
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}
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}
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void nsRepeatService::Stop(Callback aCallback, void* aCallbackData)
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{
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if (mCallback != aCallback || mCallbackData != aCallbackData)
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return;
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//printf("Stopping repeat timer\n");
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if (mRepeatTimer) {
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mRepeatTimer->Cancel();
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mRepeatTimer = nullptr;
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}
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mCallback = nullptr;
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mCallbackData = nullptr;
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}
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void
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nsRepeatService::InitTimerCallback(uint32_t aInitialDelay)
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{
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if (!mRepeatTimer) {
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return;
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}
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mRepeatTimer->InitWithNamedFuncCallback([](nsITimer* aTimer, void* aClosure) {
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// Use gRepeatService instead of nsRepeatService::GetInstance() (because
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// we don't want nsRepeatService::GetInstance() to re-create a new instance
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// for us, if we happen to get invoked after nsRepeatService::Shutdown() has
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// nulled out gRepeatService).
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nsRepeatService* rs = gRepeatService;
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if (!rs) {
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return;
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}
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if (rs->mCallback) {
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rs->mCallback(rs->mCallbackData);
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}
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rs->InitTimerCallback(REPEAT_DELAY);
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}, nullptr, aInitialDelay, nsITimer::TYPE_ONE_SHOT, mCallbackName.Data());
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}
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