progress.js
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"use strict";
module.exports = function(Promise, PromiseArray) {
var util = require("./util.js");
var async = require("./async.js");
var tryCatch = util.tryCatch;
var errorObj = util.errorObj;
Promise.prototype.progressed = function (handler) {
return this._then(undefined, undefined, handler, undefined, undefined);
};
Promise.prototype._progress = function (progressValue) {
if (this._isFollowingOrFulfilledOrRejected()) return;
this._target()._progressUnchecked(progressValue);
};
Promise.prototype._progressHandlerAt = function (index) {
return index === 0
? this._progressHandler0
: this[(index << 2) + index - 5 + 2];
};
Promise.prototype._doProgressWith = function (progression) {
var progressValue = progression.value;
var handler = progression.handler;
var promise = progression.promise;
var receiver = progression.receiver;
var ret = tryCatch(handler).call(receiver, progressValue);
if (ret === errorObj) {
if (ret.e != null &&
ret.e.name !== "StopProgressPropagation") {
var trace = util.canAttachTrace(ret.e)
? ret.e : new Error(util.toString(ret.e));
promise._attachExtraTrace(trace);
promise._progress(ret.e);
}
} else if (ret instanceof Promise) {
ret._then(promise._progress, null, null, promise, undefined);
} else {
promise._progress(ret);
}
};
Promise.prototype._progressUnchecked = function (progressValue) {
var len = this._length();
var progress = this._progress;
for (var i = 0; i < len; i++) {
var handler = this._progressHandlerAt(i);
var promise = this._promiseAt(i);
if (!(promise instanceof Promise)) {
var receiver = this._receiverAt(i);
if (typeof handler === "function") {
handler.call(receiver, progressValue, promise);
} else if (receiver instanceof PromiseArray &&
!receiver._isResolved()) {
receiver._promiseProgressed(progressValue, promise);
}
continue;
}
if (typeof handler === "function") {
async.invoke(this._doProgressWith, this, {
handler: handler,
promise: promise,
receiver: this._receiverAt(i),
value: progressValue
});
} else {
async.invoke(progress, promise, progressValue);
}
}
};
};