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"use strict";
var firstLineError;
try {throw new Error(); } catch (e) {firstLineError = e;}
var schedule = require("./schedule.js");
var Queue = require("./queue.js");
var util = require("./util.js");
function Async() {
this._isTickUsed = false;
this._lateQueue = new Queue(16);
this._normalQueue = new Queue(16);
this._trampolineEnabled = true;
var self = this;
this.drainQueues = function () {
self._drainQueues();
};
this._schedule =
schedule.isStatic ? schedule(this.drainQueues) : schedule;
}
Async.prototype.disableTrampolineIfNecessary = function() {
if (util.hasDevTools) {
this._trampolineEnabled = false;
}
};
Async.prototype.enableTrampoline = function() {
if (!this._trampolineEnabled) {
this._trampolineEnabled = true;
this._schedule = function(fn) {
setTimeout(fn, 0);
};
}
};
Async.prototype.haveItemsQueued = function () {
return this._normalQueue.length() > 0;
};
Async.prototype.throwLater = function(fn, arg) {
if (arguments.length === 1) {
arg = fn;
fn = function () { throw arg; };
}
if (typeof setTimeout !== "undefined") {
setTimeout(function() {
fn(arg);
}, 0);
} else try {
this._schedule(function() {
fn(arg);
});
} catch (e) {
throw new Error("No async scheduler available\u000a\u000a See http://goo.gl/m3OTXk\u000a");
}
};
function AsyncInvokeLater(fn, receiver, arg) {
this._lateQueue.push(fn, receiver, arg);
this._queueTick();
}
function AsyncInvoke(fn, receiver, arg) {
this._normalQueue.push(fn, receiver, arg);
this._queueTick();
}
function AsyncSettlePromises(promise) {
this._normalQueue._pushOne(promise);
this._queueTick();
}
if (!util.hasDevTools) {
Async.prototype.invokeLater = AsyncInvokeLater;
Async.prototype.invoke = AsyncInvoke;
Async.prototype.settlePromises = AsyncSettlePromises;
} else {
if (schedule.isStatic) {
schedule = function(fn) { setTimeout(fn, 0); };
}
Async.prototype.invokeLater = function (fn, receiver, arg) {
if (this._trampolineEnabled) {
AsyncInvokeLater.call(this, fn, receiver, arg);
} else {
this._schedule(function() {
setTimeout(function() {
fn.call(receiver, arg);
}, 100);
});
}
};
Async.prototype.invoke = function (fn, receiver, arg) {
if (this._trampolineEnabled) {
AsyncInvoke.call(this, fn, receiver, arg);
} else {
this._schedule(function() {
fn.call(receiver, arg);
});
}
};
Async.prototype.settlePromises = function(promise) {
if (this._trampolineEnabled) {
AsyncSettlePromises.call(this, promise);
} else {
this._schedule(function() {
promise._settlePromises();
});
}
};
}
Async.prototype.invokeFirst = function (fn, receiver, arg) {
this._normalQueue.unshift(fn, receiver, arg);
this._queueTick();
};
Async.prototype._drainQueue = function(queue) {
while (queue.length() > 0) {
var fn = queue.shift();
if (typeof fn !== "function") {
fn._settlePromises();
continue;
}
var receiver = queue.shift();
var arg = queue.shift();
fn.call(receiver, arg);
}
};
Async.prototype._drainQueues = function () {
this._drainQueue(this._normalQueue);
this._reset();
this._drainQueue(this._lateQueue);
};
Async.prototype._queueTick = function () {
if (!this._isTickUsed) {
this._isTickUsed = true;
this._schedule(this.drainQueues);
}
};
Async.prototype._reset = function () {
this._isTickUsed = false;
};
module.exports = new Async();
module.exports.firstLineError = firstLineError;
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