%PDF-
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Mini Shell
Mini Shell
;(function(window)
{
/****************** ATTENTION *******************************
* Please do not use Bitrix CoreJS in this class.
* This class can be called on page without Bitrix Framework
*************************************************************/
if (!window.BX)
{
window.BX = {};
}
else if (window.BX.Promise)
{
return;
}
var BX = window.BX;
BX.Promise = function(fn, ctx) // fn is future-reserved
{
this.state = null;
this.value = null;
this.reason = null;
this.next = null;
this.ctx = ctx || this;
this.onFulfilled = [];
this.onRejected = [];
};
BX.Promise.prototype.fulfill = function(value)
{
this.checkState();
this.value = value;
this.state = true;
this.execute();
};
BX.Promise.prototype.reject = function(reason)
{
this.checkState();
this.reason = reason;
this.state = false;
this.execute();
};
BX.Promise.prototype.then = function(onFulfilled, onRejected)
{
if(typeof (onFulfilled) == "function" || onFulfilled instanceof Function)
{
this.onFulfilled.push(onFulfilled);
}
if(typeof (onRejected) == "function" || onRejected instanceof Function)
{
this.onRejected.push(onRejected);
}
if(this.next === null)
{
this.next = new BX.Promise(null, this.ctx);
}
if(this.state !== null) // if promise was already resolved, execute immediately
{
this.execute();
}
return this.next;
};
BX.Promise.prototype.catch = function(onRejected)
{
if(typeof (onRejected) == "function" || onRejected instanceof Function)
{
this.onRejected.push(onRejected);
}
if(this.next === null)
{
this.next = new BX.Promise(null, this.ctx);
}
if(this.state !== null) // if promise was already resolved, execute immediately
{
this.execute();
}
return this.next;
};
BX.Promise.prototype.setAutoResolve = function(way, ms)
{
this.timer = setTimeout(function(){
if(this.state === null)
{
this[way ? 'fulfill' : 'reject']();
}
}.bind(this), ms || 15);
};
BX.Promise.prototype.cancelAutoResolve = function()
{
clearTimeout(this.timer);
};
/**
* Resolve function. This function allows promise chaining, like ..then().then()...
* Typical usage:
*
* var p = new Promise();
*
* p.then(function(value){
* return someValue; // next promise in the chain will be fulfilled with someValue
* }).then(function(value){
*
* var p1 = new Promise();
* *** some async code here, that eventually resolves p1 ***
*
* return p1; // chain will resume when p1 resolved (fulfilled or rejected)
* }).then(function(value){
*
* // you can also do
* var e = new Error();
* throw e;
* // it will cause next promise to be rejected with e
*
* return someOtherValue;
* }).then(function(value){
* ...
* }, function(reason){
* // promise was rejected with reason
* })...;
*
* p.fulfill('let`s start this chain');
*
* @param x
*/
BX.Promise.prototype.resolve = function(x)
{
var this_ = this;
if(this === x)
{
this.reject(new TypeError('Promise cannot fulfill or reject itself')); // avoid recursion
}
// allow "pausing" promise chaining until promise x is fulfilled or rejected
else if(x && x.toString() === "[object BX.Promise]")
{
x.then(function(value){
this_.fulfill(value);
}, function(reason){
this_.reject(reason);
});
}
else // auto-fulfill this promise
{
this.fulfill(x);
}
};
BX.Promise.prototype.toString = function()
{
return "[object BX.Promise]";
};
BX.Promise.prototype.execute = function()
{
if(this.state === null)
{
//then() must not be called before BX.Promise resolve() happens
return;
}
var value = undefined;
var reason = undefined;
var x = undefined;
var k;
if(this.state === true) // promise was fulfill()-ed
{
if(this.onFulfilled.length)
{
try
{
for(k = 0; k < this.onFulfilled.length; k++)
{
x = this.onFulfilled[k].apply(this.ctx, [this.value]);
if(typeof x != 'undefined')
{
value = x;
}
}
}
catch(e)
{
if('console' in window)
{
console.dir(e);
}
if (typeof BX.debug !== 'undefined')
{
BX.debug(e);
}
reason = e; // reject next
}
}
else
{
value = this.value; // resolve next
}
}
else if(this.state === false) // promise was reject()-ed
{
if(this.onRejected.length)
{
try
{
for(k = 0; k < this.onRejected.length; k++)
{
x = this.onRejected[k].apply(this.ctx, [this.reason]);
if(typeof x != 'undefined')
{
value = x;
}
}
}
catch(e)
{
if('console' in window)
{
console.dir(e);
}
if (typeof BX.debug !== 'undefined')
{
BX.debug(e);
}
reason = e; // reject next
}
}
else
{
reason = this.reason; // reject next
}
}
if(this.next !== null)
{
if(typeof reason != 'undefined')
{
this.next.reject(reason);
}
else if(typeof value != 'undefined')
{
this.next.resolve(value);
}
}
};
BX.Promise.prototype.checkState = function()
{
if(this.state !== null)
{
throw new Error('You can not do fulfill() or reject() multiple times');
}
};
})(window);
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