Spaces:
Sleeping
Sleeping
File size: 3,707 Bytes
2434dca |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 |
"use strict";
module.exports = function(Promise, PromiseArray, apiRejection, debug) {
var util = require("./util");
var tryCatch = util.tryCatch;
var errorObj = util.errorObj;
var async = Promise._async;
Promise.prototype["break"] = Promise.prototype.cancel = function() {
if (!debug.cancellation()) return this._warn("cancellation is disabled");
var promise = this;
var child = promise;
while (promise._isCancellable()) {
if (!promise._cancelBy(child)) {
if (child._isFollowing()) {
child._followee().cancel();
} else {
child._cancelBranched();
}
break;
}
var parent = promise._cancellationParent;
if (parent == null || !parent._isCancellable()) {
if (promise._isFollowing()) {
promise._followee().cancel();
} else {
promise._cancelBranched();
}
break;
} else {
if (promise._isFollowing()) promise._followee().cancel();
promise._setWillBeCancelled();
child = promise;
promise = parent;
}
}
};
Promise.prototype._branchHasCancelled = function() {
this._branchesRemainingToCancel--;
};
Promise.prototype._enoughBranchesHaveCancelled = function() {
return this._branchesRemainingToCancel === undefined ||
this._branchesRemainingToCancel <= 0;
};
Promise.prototype._cancelBy = function(canceller) {
if (canceller === this) {
this._branchesRemainingToCancel = 0;
this._invokeOnCancel();
return true;
} else {
this._branchHasCancelled();
if (this._enoughBranchesHaveCancelled()) {
this._invokeOnCancel();
return true;
}
}
return false;
};
Promise.prototype._cancelBranched = function() {
if (this._enoughBranchesHaveCancelled()) {
this._cancel();
}
};
Promise.prototype._cancel = function() {
if (!this._isCancellable()) return;
this._setCancelled();
async.invoke(this._cancelPromises, this, undefined);
};
Promise.prototype._cancelPromises = function() {
if (this._length() > 0) this._settlePromises();
};
Promise.prototype._unsetOnCancel = function() {
this._onCancelField = undefined;
};
Promise.prototype._isCancellable = function() {
return this.isPending() && !this._isCancelled();
};
Promise.prototype.isCancellable = function() {
return this.isPending() && !this.isCancelled();
};
Promise.prototype._doInvokeOnCancel = function(onCancelCallback, internalOnly) {
if (util.isArray(onCancelCallback)) {
for (var i = 0; i < onCancelCallback.length; ++i) {
this._doInvokeOnCancel(onCancelCallback[i], internalOnly);
}
} else if (onCancelCallback !== undefined) {
if (typeof onCancelCallback === "function") {
if (!internalOnly) {
var e = tryCatch(onCancelCallback).call(this._boundValue());
if (e === errorObj) {
this._attachExtraTrace(e.e);
async.throwLater(e.e);
}
}
} else {
onCancelCallback._resultCancelled(this);
}
}
};
Promise.prototype._invokeOnCancel = function() {
var onCancelCallback = this._onCancel();
this._unsetOnCancel();
async.invoke(this._doInvokeOnCancel, this, onCancelCallback);
};
Promise.prototype._invokeInternalOnCancel = function() {
if (this._isCancellable()) {
this._doInvokeOnCancel(this._onCancel(), true);
this._unsetOnCancel();
}
};
Promise.prototype._resultCancelled = function() {
this.cancel();
};
};
|