diff options
Diffstat (limited to 'node_modules/bluebird/js/release/finally.js')
-rw-r--r-- | node_modules/bluebird/js/release/finally.js | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/node_modules/bluebird/js/release/finally.js b/node_modules/bluebird/js/release/finally.js new file mode 100644 index 000000000..371791121 --- /dev/null +++ b/node_modules/bluebird/js/release/finally.js @@ -0,0 +1,111 @@ +"use strict"; +module.exports = function(Promise, tryConvertToPromise) { +var util = require("./util"); +var CancellationError = Promise.CancellationError; +var errorObj = util.errorObj; + +function PassThroughHandlerContext(promise, type, handler) { + this.promise = promise; + this.type = type; + this.handler = handler; + this.called = false; + this.cancelPromise = null; +} + +PassThroughHandlerContext.prototype.isFinallyHandler = function() { + return this.type === 0; +}; + +function FinallyHandlerCancelReaction(finallyHandler) { + this.finallyHandler = finallyHandler; +} + +FinallyHandlerCancelReaction.prototype._resultCancelled = function() { + checkCancel(this.finallyHandler); +}; + +function checkCancel(ctx, reason) { + if (ctx.cancelPromise != null) { + if (arguments.length > 1) { + ctx.cancelPromise._reject(reason); + } else { + ctx.cancelPromise._cancel(); + } + ctx.cancelPromise = null; + return true; + } + return false; +} + +function succeed() { + return finallyHandler.call(this, this.promise._target()._settledValue()); +} +function fail(reason) { + if (checkCancel(this, reason)) return; + errorObj.e = reason; + return errorObj; +} +function finallyHandler(reasonOrValue) { + var promise = this.promise; + var handler = this.handler; + + if (!this.called) { + this.called = true; + var ret = this.isFinallyHandler() + ? handler.call(promise._boundValue()) + : handler.call(promise._boundValue(), reasonOrValue); + if (ret !== undefined) { + promise._setReturnedNonUndefined(); + var maybePromise = tryConvertToPromise(ret, promise); + if (maybePromise instanceof Promise) { + if (this.cancelPromise != null) { + if (maybePromise._isCancelled()) { + var reason = + new CancellationError("late cancellation observer"); + promise._attachExtraTrace(reason); + errorObj.e = reason; + return errorObj; + } else if (maybePromise.isPending()) { + maybePromise._attachCancellationCallback( + new FinallyHandlerCancelReaction(this)); + } + } + return maybePromise._then( + succeed, fail, undefined, this, undefined); + } + } + } + + if (promise.isRejected()) { + checkCancel(this); + errorObj.e = reasonOrValue; + return errorObj; + } else { + checkCancel(this); + return reasonOrValue; + } +} + +Promise.prototype._passThrough = function(handler, type, success, fail) { + if (typeof handler !== "function") return this.then(); + return this._then(success, + fail, + undefined, + new PassThroughHandlerContext(this, type, handler), + undefined); +}; + +Promise.prototype.lastly = +Promise.prototype["finally"] = function (handler) { + return this._passThrough(handler, + 0, + finallyHandler, + finallyHandler); +}; + +Promise.prototype.tap = function (handler) { + return this._passThrough(handler, 1, finallyHandler); +}; + +return PassThroughHandlerContext; +}; |