зеркало из https://github.com/mozilla/gecko-dev.git
94 строки
2.7 KiB
C++
94 строки
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 "mozilla/dom/Document.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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nsRepeatService::~nsRepeatService() {
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NS_ASSERTION(!mCallback && !mCallbackData,
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"Callback was not removed before shutdown");
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}
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/* static */
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nsRepeatService* nsRepeatService::GetInstance() {
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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*/
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void nsRepeatService::Shutdown() { gRepeatService = nullptr; }
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void nsRepeatService::Start(Callback aCallback, void* aCallbackData,
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dom::Document* aDocument,
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const nsACString& aCallbackName,
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uint32_t aInitialDelay) {
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MOZ_ASSERT(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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mRepeatTimer = NS_NewTimer(aDocument->EventTargetFor(TaskCategory::Other));
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if (mRepeatTimer) {
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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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if (mCallback != aCallback || mCallbackData != aCallbackData) 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 nsRepeatService::InitTimerCallback(uint32_t aInitialDelay) {
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if (!mRepeatTimer) {
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return;
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}
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mRepeatTimer->InitWithNamedFuncCallback(
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[](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
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// instance for us, if we happen to get invoked after
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// nsRepeatService::Shutdown() has 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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},
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nullptr, aInitialDelay, nsITimer::TYPE_ONE_SHOT, mCallbackName.Data());
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}
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