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// **********************************************************************
//
// Copyright (c) 2003-2018 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
//
// jshint browser: true
//
/* global WorkerGlobalScope */
const Ice = require("../Ice/ModuleRegistry").Ice;
//
// Create a timer object that uses the default browser methods. Note that we also
// have to use apply with null as the first argument to workaround an issue where
// IE doesn't like these functions to be called with an unknown object (it reports
// an "Invalid calling object" error).
//
function createTimerObject()
{
const Timer = class
{
static setTimeout(cb, ms)
{
return setTimeout.apply(null, arguments);
}
static clearTimeout(id)
{
return clearTimeout.apply(null, arguments);
}
static setInterval()
{
return setInterval.apply(null, arguments);
}
static clearInterval()
{
return clearInterval.apply(null, arguments);
}
};
if(typeof(setImmediate) == "function")
{
Timer.setImmediate = function()
{
return setImmediate.apply(null, arguments);
};
}
else
{
Timer.setImmediate = function()
{
return setTimeout.apply(null, arguments);
};
}
return Timer;
}
const MAX_SAFE_INTEGER = Number.MAX_SAFE_INTEGER || 9007199254740991;
const _timers = new Map();
const _SetTimeoutType = 0;
const _SetIntervalType = 1;
const _SetImmediateType = 2;
const _ClearTimeoutType = 3;
const _ClearIntervalType = 4;
let worker;
let _nextId = 0;
const nextId = function()
{
if(_nextId == MAX_SAFE_INTEGER)
{
_nextId = 0;
}
return _nextId++;
};
class Timer
{
static setTimeout(cb, ms)
{
const id = nextId();
_timers.set(id, cb);
worker.postMessage({type: _SetTimeoutType, id: id, ms: ms});
return id;
}
static clearTimeout(id)
{
_timers.delete(id);
worker.postMessage({type: _ClearTimeoutType, id: id});
}
static setInterval(cb, ms)
{
const id = nextId();
_timers.set(id, cb);
worker.postMessage({type: _SetIntervalType, id: id, ms: ms});
return id;
}
static clearInterval(id)
{
_timers.delete(id);
worker.postMessage({type: _ClearIntervalType, id: id});
}
static setImmediate(cb)
{
const id = nextId();
_timers.set(id, cb);
worker.postMessage({type: _SetImmediateType, id: id});
return id;
}
static onmessage(e)
{
const cb = _timers.get(e.data.id);
if(cb !== undefined)
{
cb.call();
if(e.data.type !== _SetIntervalType)
{
_timers.delete(e.data.id);
}
}
}
}
const workerCode = function()
{
return "(" +
function()
{
//
// jshint worker: true
//
const _wSetTimeoutType = 0;
const _wSetIntervalType = 1;
const _wSetImmediateType = 2;
const _wClearTimeoutType = 3;
const _wClearIntervalType = 4;
const timers = {};
self.onmessage = e =>
{
if(e.data.type == _wSetTimeoutType)
{
timers[e.data.id] = setTimeout(() => self.postMessage(e.data), e.data.ms);
}
else if(e.data.type == _wSetIntervalType)
{
timers[e.data.id] = setInterval(() => self.postMessage(e.data), e.data.ms);
}
else if(e.data.type == _wSetImmediateType)
{
self.postMessage(e.data);
}
else if(e.data.type == _wClearTimeoutType)
{
clearTimeout(timers[e.data.id]);
delete timers[e.data.id];
}
else if(e.data.type == _wClearIntervalType)
{
clearInterval(timers[e.data.id]);
delete timers[e.data.id];
}
};
//
// jshint worker: false
//
}.toString() + "());";
};
if(typeof(WorkerGlobalScope) !== 'undefined' && this instanceof WorkerGlobalScope)
{
//
// If we are running in a worker don't spawn a separate worker for the timer
//
Ice.Timer = createTimerObject();
}
else if(worker === undefined)
{
let url;
try
{
url = URL.createObjectURL(new Blob([workerCode()], {type : 'text/javascript'}));
worker = new Worker(url);
worker.onmessage = Timer.onmessage;
Ice.Timer = Timer;
}
catch(ex)
{
if(url !== undefined)
{
URL.revokeObjectURL(url);
}
//
// Fallback on setInterval/setTimeout if the worker creating failed. Some IE10 and IE11 don't
// support creating workers from blob URLs for instance.
//
Ice.Timer = createTimerObject();
}
}
|
