aurelia-bootstrap
Version:
Bootstrap components written in Aurelia.
185 lines (184 loc) • 6.95 kB
JavaScript
/* */
"use strict";
module.exports = function(Promise, apiRejection, INTERNAL, tryConvertToPromise, Proxyable, debug) {
var errors = require('./errors');
var TypeError = errors.TypeError;
var util = require('./util');
var errorObj = util.errorObj;
var tryCatch = util.tryCatch;
var yieldHandlers = [];
function promiseFromYieldHandler(value, yieldHandlers, traceParent) {
for (var i = 0; i < yieldHandlers.length; ++i) {
traceParent._pushContext();
var result = tryCatch(yieldHandlers[i])(value);
traceParent._popContext();
if (result === errorObj) {
traceParent._pushContext();
var ret = Promise.reject(errorObj.e);
traceParent._popContext();
return ret;
}
var maybePromise = tryConvertToPromise(result, traceParent);
if (maybePromise instanceof Promise)
return maybePromise;
}
return null;
}
function PromiseSpawn(generatorFunction, receiver, yieldHandler, stack) {
if (debug.cancellation()) {
var internal = new Promise(INTERNAL);
var _finallyPromise = this._finallyPromise = new Promise(INTERNAL);
this._promise = internal.lastly(function() {
return _finallyPromise;
});
internal._captureStackTrace();
internal._setOnCancel(this);
} else {
var promise = this._promise = new Promise(INTERNAL);
promise._captureStackTrace();
}
this._stack = stack;
this._generatorFunction = generatorFunction;
this._receiver = receiver;
this._generator = undefined;
this._yieldHandlers = typeof yieldHandler === "function" ? [yieldHandler].concat(yieldHandlers) : yieldHandlers;
this._yieldedPromise = null;
this._cancellationPhase = false;
}
util.inherits(PromiseSpawn, Proxyable);
PromiseSpawn.prototype._isResolved = function() {
return this._promise === null;
};
PromiseSpawn.prototype._cleanup = function() {
this._promise = this._generator = null;
if (debug.cancellation() && this._finallyPromise !== null) {
this._finallyPromise._fulfill();
this._finallyPromise = null;
}
};
PromiseSpawn.prototype._promiseCancelled = function() {
if (this._isResolved())
return;
var implementsReturn = typeof this._generator["return"] !== "undefined";
var result;
if (!implementsReturn) {
var reason = new Promise.CancellationError("generator .return() sentinel");
Promise.coroutine.returnSentinel = reason;
this._promise._attachExtraTrace(reason);
this._promise._pushContext();
result = tryCatch(this._generator["throw"]).call(this._generator, reason);
this._promise._popContext();
} else {
this._promise._pushContext();
result = tryCatch(this._generator["return"]).call(this._generator, undefined);
this._promise._popContext();
}
this._cancellationPhase = true;
this._yieldedPromise = null;
this._continue(result);
};
PromiseSpawn.prototype._promiseFulfilled = function(value) {
this._yieldedPromise = null;
this._promise._pushContext();
var result = tryCatch(this._generator.next).call(this._generator, value);
this._promise._popContext();
this._continue(result);
};
PromiseSpawn.prototype._promiseRejected = function(reason) {
this._yieldedPromise = null;
this._promise._attachExtraTrace(reason);
this._promise._pushContext();
var result = tryCatch(this._generator["throw"]).call(this._generator, reason);
this._promise._popContext();
this._continue(result);
};
PromiseSpawn.prototype._resultCancelled = function() {
if (this._yieldedPromise instanceof Promise) {
var promise = this._yieldedPromise;
this._yieldedPromise = null;
promise.cancel();
}
};
PromiseSpawn.prototype.promise = function() {
return this._promise;
};
PromiseSpawn.prototype._run = function() {
this._generator = this._generatorFunction.call(this._receiver);
this._receiver = this._generatorFunction = undefined;
this._promiseFulfilled(undefined);
};
PromiseSpawn.prototype._continue = function(result) {
var promise = this._promise;
if (result === errorObj) {
this._cleanup();
if (this._cancellationPhase) {
return promise.cancel();
} else {
return promise._rejectCallback(result.e, false);
}
}
var value = result.value;
if (result.done === true) {
this._cleanup();
if (this._cancellationPhase) {
return promise.cancel();
} else {
return promise._resolveCallback(value);
}
} else {
var maybePromise = tryConvertToPromise(value, this._promise);
if (!(maybePromise instanceof Promise)) {
maybePromise = promiseFromYieldHandler(maybePromise, this._yieldHandlers, this._promise);
if (maybePromise === null) {
this._promiseRejected(new TypeError("A value %s was yielded that could not be treated as a promise\u000a\u000a See http://goo.gl/MqrFmX\u000a\u000a".replace("%s", value) + "From coroutine:\u000a" + this._stack.split("\n").slice(1, -7).join("\n")));
return;
}
}
maybePromise = maybePromise._target();
var bitField = maybePromise._bitField;
;
if (((bitField & 50397184) === 0)) {
this._yieldedPromise = maybePromise;
maybePromise._proxy(this, null);
} else if (((bitField & 33554432) !== 0)) {
this._promiseFulfilled(maybePromise._value());
} else if (((bitField & 16777216) !== 0)) {
this._promiseRejected(maybePromise._reason());
} else {
this._promiseCancelled();
}
}
};
Promise.coroutine = function(generatorFunction, options) {
if (typeof generatorFunction !== "function") {
throw new TypeError("generatorFunction must be a function\u000a\u000a See http://goo.gl/MqrFmX\u000a");
}
var yieldHandler = Object(options).yieldHandler;
var PromiseSpawn$ = PromiseSpawn;
var stack = new Error().stack;
return function() {
var generator = generatorFunction.apply(this, arguments);
var spawn = new PromiseSpawn$(undefined, undefined, yieldHandler, stack);
var ret = spawn.promise();
spawn._generator = generator;
spawn._promiseFulfilled(undefined);
return ret;
};
};
Promise.coroutine.addYieldHandler = function(fn) {
if (typeof fn !== "function") {
throw new TypeError("expecting a function but got " + util.classString(fn));
}
yieldHandlers.push(fn);
};
Promise.spawn = function(generatorFunction) {
debug.deprecated("Promise.spawn()", "Promise.coroutine()");
if (typeof generatorFunction !== "function") {
return apiRejection("generatorFunction must be a function\u000a\u000a See http://goo.gl/MqrFmX\u000a");
}
var spawn = new PromiseSpawn(generatorFunction, this);
var ret = spawn.promise();
spawn._run(Promise.spawn);
return ret;
};
};