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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
//
// Eric Vaughan
// Netscape Communications
//
// See documentation in associated header file
//
#include "nsRepeatService.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/dom/Document.h"
using namespace mozilla;
static StaticAutoPtr<nsRepeatService> gRepeatService;
nsRepeatService::nsRepeatService()
: mCallback(nullptr), mCallbackData(nullptr) {}
nsRepeatService::~nsRepeatService() {
NS_ASSERTION(!mCallback && !mCallbackData,
"Callback was not removed before shutdown");
}
/* static */
nsRepeatService* nsRepeatService::GetInstance() {
if (!gRepeatService) {
gRepeatService = new nsRepeatService();
}
return gRepeatService;
}
/*static*/
void nsRepeatService::Shutdown() { gRepeatService = nullptr; }
void nsRepeatService::Start(Callback aCallback, void* aCallbackData,
dom::Document* aDocument,
const nsACString& aCallbackName,
uint32_t aInitialDelay) {
MOZ_ASSERT(aCallback != nullptr, "null ptr");
mCallback = aCallback;
mCallbackData = aCallbackData;
mCallbackName = aCallbackName;
mRepeatTimer = NS_NewTimer(aDocument->EventTargetFor(TaskCategory::Other));
if (mRepeatTimer) {
InitTimerCallback(aInitialDelay);
}
}
void nsRepeatService::Stop(Callback aCallback, void* aCallbackData) {
if (mCallback != aCallback || mCallbackData != aCallbackData) return;
// printf("Stopping repeat timer\n");
if (mRepeatTimer) {
mRepeatTimer->Cancel();
mRepeatTimer = nullptr;
}
mCallback = nullptr;
mCallbackData = nullptr;
}
void nsRepeatService::InitTimerCallback(uint32_t aInitialDelay) {
if (!mRepeatTimer) {
return;
}
mRepeatTimer->InitWithNamedFuncCallback(
[](nsITimer* aTimer, void* aClosure) {
// Use gRepeatService instead of nsRepeatService::GetInstance() (because
// we don't want nsRepeatService::GetInstance() to re-create a new
// instance for us, if we happen to get invoked after
// nsRepeatService::Shutdown() has nulled out gRepeatService).
nsRepeatService* rs = gRepeatService;
if (!rs) {
return;
}
if (rs->mCallback) {
rs->mCallback(rs->mCallbackData);
}
rs->InitTimerCallback(REPEAT_DELAY);
},
nullptr, aInitialDelay, nsITimer::TYPE_ONE_SHOT, mCallbackName.Data());
}