michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: //
michael@0: // Eric Vaughan
michael@0: // Netscape Communications
michael@0: //
michael@0: // See documentation in associated header file
michael@0: //
michael@0: 
michael@0: #include "nsRepeatService.h"
michael@0: #include "nsIServiceManager.h"
michael@0: 
michael@0: nsRepeatService* nsRepeatService::gInstance = nullptr;
michael@0: 
michael@0: nsRepeatService::nsRepeatService()
michael@0: : mCallback(nullptr), mCallbackData(nullptr)
michael@0: {
michael@0: }
michael@0: 
michael@0: nsRepeatService::~nsRepeatService()
michael@0: {
michael@0:   NS_ASSERTION(!mCallback && !mCallbackData, "Callback was not removed before shutdown");
michael@0: }
michael@0: 
michael@0: nsRepeatService* 
michael@0: nsRepeatService::GetInstance()
michael@0: {
michael@0:   if (!gInstance) {
michael@0:     gInstance = new nsRepeatService();
michael@0:     NS_IF_ADDREF(gInstance);
michael@0:   }
michael@0:   return gInstance;
michael@0: }
michael@0: 
michael@0: /*static*/ void
michael@0: nsRepeatService::Shutdown()
michael@0: {
michael@0:   NS_IF_RELEASE(gInstance);
michael@0: }
michael@0: 
michael@0: void nsRepeatService::Start(Callback aCallback, void* aCallbackData,
michael@0:                             uint32_t aInitialDelay)
michael@0: {
michael@0:   NS_PRECONDITION(aCallback != nullptr, "null ptr");
michael@0: 
michael@0:   mCallback = aCallback;
michael@0:   mCallbackData = aCallbackData;
michael@0:   nsresult rv;
michael@0:   mRepeatTimer = do_CreateInstance("@mozilla.org/timer;1", &rv);
michael@0: 
michael@0:   if (NS_SUCCEEDED(rv))  {
michael@0:     mRepeatTimer->InitWithCallback(this, aInitialDelay, nsITimer::TYPE_ONE_SHOT);
michael@0:   }
michael@0: }
michael@0: 
michael@0: void nsRepeatService::Stop(Callback aCallback, void* aCallbackData)
michael@0: {
michael@0:   if (mCallback != aCallback || mCallbackData != aCallbackData)
michael@0:     return;
michael@0: 
michael@0:   //printf("Stopping repeat timer\n");
michael@0:   if (mRepeatTimer) {
michael@0:      mRepeatTimer->Cancel();
michael@0:      mRepeatTimer = nullptr;
michael@0:   }
michael@0:   mCallback = nullptr;
michael@0:   mCallbackData = nullptr;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP nsRepeatService::Notify(nsITimer *timer)
michael@0: {
michael@0:   // do callback
michael@0:   if (mCallback)
michael@0:     mCallback(mCallbackData);
michael@0: 
michael@0:   // start timer again.
michael@0:   if (mRepeatTimer) {
michael@0:     mRepeatTimer->InitWithCallback(this, REPEAT_DELAY, nsITimer::TYPE_ONE_SHOT);
michael@0:   }
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMPL_ISUPPORTS(nsRepeatService, nsITimerCallback)