gecko/layout/xul/base/src/nsRepeatService.cpp

126 lines
3.6 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
//
// Eric Vaughan
// Netscape Communications
//
// See documentation in associated header file
//
#include "nsRepeatService.h"
#include "nsIServiceManager.h"
#ifdef XP_MACOSX
#define INITAL_REPEAT_DELAY 250
#define REPEAT_DELAY 25
#else
#define INITAL_REPEAT_DELAY 250
#define REPEAT_DELAY 50
#endif
nsRepeatService* nsRepeatService::gInstance = nsnull;
nsRepeatService::nsRepeatService()
: mCallback(nsnull), mCallbackData(nsnull)
{
}
nsRepeatService::~nsRepeatService()
{
NS_ASSERTION(!mCallback && !mCallbackData, "Callback was not removed before shutdown");
}
nsRepeatService*
nsRepeatService::GetInstance()
{
if (!gInstance) {
gInstance = new nsRepeatService();
NS_IF_ADDREF(gInstance);
}
return gInstance;
}
/*static*/ void
nsRepeatService::Shutdown()
{
NS_IF_RELEASE(gInstance);
}
void nsRepeatService::Start(Callback aCallback, void* aCallbackData)
{
NS_PRECONDITION(aCallback != nsnull, "null ptr");
mCallback = aCallback;
mCallbackData = aCallbackData;
nsresult rv;
mRepeatTimer = do_CreateInstance("@mozilla.org/timer;1", &rv);
if (NS_SUCCEEDED(rv)) {
mRepeatTimer->InitWithCallback(this, INITAL_REPEAT_DELAY, nsITimer::TYPE_ONE_SHOT);
}
}
void nsRepeatService::Stop(Callback aCallback, void* aCallbackData)
{
if (mCallback != aCallback || mCallbackData != aCallbackData)
return;
//printf("Stopping repeat timer\n");
if (mRepeatTimer) {
mRepeatTimer->Cancel();
mRepeatTimer = nsnull;
}
mCallback = nsnull;
mCallbackData = nsnull;
}
NS_IMETHODIMP nsRepeatService::Notify(nsITimer *timer)
{
// do callback
if (mCallback)
mCallback(mCallbackData);
// start timer again.
if (mRepeatTimer) {
mRepeatTimer->InitWithCallback(this, REPEAT_DELAY, nsITimer::TYPE_ONE_SHOT);
}
return NS_OK;
}
NS_IMPL_ISUPPORTS1(nsRepeatService, nsITimerCallback)