The Tor Browser: layout/xul/nsRepeatService.cpp@141e0f1194b1

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 //

     7 // Eric Vaughan

     8 // Netscape Communications

     9 //

    10 // See documentation in associated header file

    11 //

    13 #include "nsRepeatService.h"

    14 #include "nsIServiceManager.h"

    16 nsRepeatService* nsRepeatService::gInstance = nullptr;

    18 nsRepeatService::nsRepeatService()

    19 : mCallback(nullptr), mCallbackData(nullptr)

    20 {

    21 }

    23 nsRepeatService::~nsRepeatService()

    24 {

    25   NS_ASSERTION(!mCallback && !mCallbackData, "Callback was not removed before shutdown");

    26 }

    28 nsRepeatService*

    29 nsRepeatService::GetInstance()

    30 {

    31   if (!gInstance) {

    32     gInstance = new nsRepeatService();

    33     NS_IF_ADDREF(gInstance);

    34   }

    35   return gInstance;

    36 }

    38 /*static*/ void

    39 nsRepeatService::Shutdown()

    40 {

    41   NS_IF_RELEASE(gInstance);

    42 }

    44 void nsRepeatService::Start(Callback aCallback, void* aCallbackData,

    45                             uint32_t aInitialDelay)

    46 {

    47   NS_PRECONDITION(aCallback != nullptr, "null ptr");

    49   mCallback = aCallback;

    50   mCallbackData = aCallbackData;

    51   nsresult rv;

    52   mRepeatTimer = do_CreateInstance("@mozilla.org/timer;1", &rv);

    54   if (NS_SUCCEEDED(rv))  {

    55     mRepeatTimer->InitWithCallback(this, aInitialDelay, nsITimer::TYPE_ONE_SHOT);

    56   }

    57 }

    59 void nsRepeatService::Stop(Callback aCallback, void* aCallbackData)

    60 {

    61   if (mCallback != aCallback || mCallbackData != aCallbackData)

    62     return;

    64   //printf("Stopping repeat timer\n");

    65   if (mRepeatTimer) {

    66      mRepeatTimer->Cancel();

    67      mRepeatTimer = nullptr;

    68   }

    69   mCallback = nullptr;

    70   mCallbackData = nullptr;

    71 }

    73 NS_IMETHODIMP nsRepeatService::Notify(nsITimer *timer)

    74 {

    75   // do callback

    76   if (mCallback)

    77     mCallback(mCallbackData);

    79   // start timer again.

    80   if (mRepeatTimer) {

    81     mRepeatTimer->InitWithCallback(this, REPEAT_DELAY, nsITimer::TYPE_ONE_SHOT);

    82   }

    83   return NS_OK;

    84 }

    86 NS_IMPL_ISUPPORTS(nsRepeatService, nsITimerCallback)

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