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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/. */
//
// nsRepeatService
//
#ifndef nsRepeatService_h__
#define nsRepeatService_h__
#include "nsCOMPtr.h"
#include "nsITimer.h"
#include "nsString.h"
#define INITAL_REPEAT_DELAY 250
#ifdef XP_MACOSX
# define REPEAT_DELAY 25
#else
# define REPEAT_DELAY 50
#endif
class nsITimer;
namespace mozilla {
namespace dom {
class Document;
}
} // namespace mozilla
class nsRepeatService final {
public:
typedef void (*Callback)(void* aData);
~nsRepeatService();
// Start dispatching timer events to the callback. There is no memory
// management of aData here; it is the caller's responsibility to call
// Stop() before aData's memory is released.
//
// aCallbackName is the label of the callback, used to pass to
// InitWithNamedCallbackFunc.
//
// aDocument is used to get the event target in Start(). We need an event
// target to init mRepeatTimer.
void Start(Callback aCallback, void* aCallbackData,
mozilla::dom::Document* aDocument, const nsACString& aCallbackName,
uint32_t aInitialDelay = INITAL_REPEAT_DELAY);
// Stop dispatching timer events to the callback. If the repeat service
// is not currently configured with the given callback and data, this
// is just ignored.
void Stop(Callback aCallback, void* aData);
static nsRepeatService* GetInstance();
static void Shutdown();
protected:
nsRepeatService();
private:
// helper function to initialize callback function to mRepeatTimer
void InitTimerCallback(uint32_t aInitialDelay);
Callback mCallback;
void* mCallbackData;
nsCString mCallbackName;
nsCOMPtr<nsITimer> mRepeatTimer;
}; // class nsRepeatService
#endif
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