co: add typescript wrapper
Signed-off-by: Sean Cross <sean@xobs.io>
This commit is contained in:
parent
ee336e05f5
commit
abc363de00
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@ -0,0 +1,239 @@
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/**
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* slice() reference.
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*/
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var slice = Array.prototype.slice;
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/**
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* Expose `co`.
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*/
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module.exports = co['default'] = co.co = co;
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/**
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* Wrap the given generator `fn` into a
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* function that returns a promise.
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* This is a separate function so that
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* every `co()` call doesn't create a new,
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* unnecessary closure.
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*
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* @param {GeneratorFunction} fn
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* @return {Function}
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* @api public
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*/
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co.wrap = function (fn) {
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createPromise.__generatorFunction__ = fn;
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return createPromise;
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function createPromise() {
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return co.call(this, fn.apply(this, arguments));
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}
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};
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/**
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* Execute the generator function or a generator
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* and return a promise.
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*
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* @param {Function} fn
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* @return {Promise}
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* @api public
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*/
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function co(gen) {
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var ctx = this;
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var args = slice.call(arguments, 1);
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// we wrap everything in a promise to avoid promise chaining,
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// which leads to memory leak errors.
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// see https://github.com/tj/co/issues/180
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return new Promise(function(resolve, reject) {
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if (typeof gen === 'function') gen = gen.apply(ctx, args);
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if (!gen || typeof gen.next !== 'function') return resolve(gen);
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onFulfilled();
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/**
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* @param {Mixed} res
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* @return {Promise}
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* @api private
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*/
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function onFulfilled(res) {
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var ret;
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try {
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ret = gen.next(res);
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} catch (e) {
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return reject(e);
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}
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next(ret);
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return null;
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}
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/**
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* @param {Error} err
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* @return {Promise}
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* @api private
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*/
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function onRejected(err) {
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var ret;
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try {
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ret = gen.throw(err);
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} catch (e) {
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return reject(e);
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}
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next(ret);
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}
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/**
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* Get the next value in the generator,
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* return a promise.
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*
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* @param {Object} ret
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* @return {Promise}
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* @api private
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*/
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function next(ret) {
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if (ret.done) return resolve(ret.value);
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var value = toPromise.call(ctx, ret.value);
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if (value && isPromise(value)) return value.then(onFulfilled, onRejected);
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return onRejected(new TypeError('You may only yield a function, promise, generator, array, or object, '
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+ 'but the following object was passed: "' + String(ret.value) + '"'));
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}
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});
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}
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/**
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* Convert a `yield`ed value into a promise.
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*
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* @param {Mixed} obj
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* @return {Promise}
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* @api private
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*/
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function toPromise(obj) {
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if (!obj) return obj;
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if (isPromise(obj)) return obj;
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if (isGeneratorFunction(obj) || isGenerator(obj)) return co.call(this, obj);
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if ('function' == typeof obj) return thunkToPromise.call(this, obj);
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if (Array.isArray(obj)) return arrayToPromise.call(this, obj);
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if (isObject(obj)) return objectToPromise.call(this, obj);
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return obj;
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}
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/**
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* Convert a thunk to a promise.
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*
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* @param {Function}
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* @return {Promise}
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* @api private
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*/
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function thunkToPromise(fn) {
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var ctx = this;
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return new Promise(function (resolve, reject) {
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fn.call(ctx, function (err, res) {
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if (err) return reject(err);
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if (arguments.length > 2) res = slice.call(arguments, 1);
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resolve(res);
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});
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});
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}
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/**
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* Convert an array of "yieldables" to a promise.
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* Uses `Promise.all()` internally.
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*
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* @param {Array} obj
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* @return {Promise}
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* @api private
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*/
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function arrayToPromise(obj) {
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return Promise.all(obj.map(toPromise, this));
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}
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/**
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* Convert an object of "yieldables" to a promise.
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* Uses `Promise.all()` internally.
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*
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* @param {Object} obj
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* @return {Promise}
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* @api private
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*/
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function objectToPromise(obj){
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var results = new obj.constructor();
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var keys = Object.keys(obj);
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var promises = [];
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for (var i = 0; i < keys.length; i++) {
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var key = keys[i];
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var promise = toPromise.call(this, obj[key]);
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if (promise && isPromise(promise)) defer(promise, key);
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else results[key] = obj[key];
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}
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return Promise.all(promises).then(function () {
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return results;
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});
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function defer(promise, key) {
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// predefine the key in the result
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results[key] = undefined;
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promises.push(promise.then(function (res) {
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results[key] = res;
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}));
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}
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}
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/**
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* Check if `obj` is a promise.
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*
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* @param {Object} obj
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* @return {Boolean}
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* @api private
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*/
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function isPromise(obj) {
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return 'function' == typeof obj.then;
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}
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/**
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* Check if `obj` is a generator.
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*
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* @param {Mixed} obj
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* @return {Boolean}
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* @api private
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*/
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function isGenerator(obj) {
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return 'function' == typeof obj.next && 'function' == typeof obj.throw;
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}
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/**
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* Check if `obj` is a generator function.
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*
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* @param {Mixed} obj
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* @return {Boolean}
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* @api private
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*/
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function isGeneratorFunction(obj) {
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var constructor = obj.constructor;
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if (!constructor) return false;
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if ('GeneratorFunction' === constructor.name || 'GeneratorFunction' === constructor.displayName) return true;
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return isGenerator(constructor.prototype);
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}
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/**
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* Check for plain object.
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*
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* @param {Mixed} val
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* @return {Boolean}
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* @api private
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*/
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function isObject(val) {
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return Object == val.constructor;
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}
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@ -0,0 +1,4 @@
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declare function co(g: () => Generator<any, void, undefined>): any;
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export = co;
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240
lib/co/index.js
240
lib/co/index.js
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@ -1,239 +1 @@
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/**
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* slice() reference.
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*/
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var slice = Array.prototype.slice;
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/**
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* Expose `co`.
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*/
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module.exports = co['default'] = co.co = co;
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/**
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* Wrap the given generator `fn` into a
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* function that returns a promise.
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* This is a separate function so that
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* every `co()` call doesn't create a new,
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* unnecessary closure.
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*
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* @param {GeneratorFunction} fn
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* @return {Function}
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* @api public
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*/
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co.wrap = function (fn) {
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createPromise.__generatorFunction__ = fn;
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return createPromise;
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function createPromise() {
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return co.call(this, fn.apply(this, arguments));
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}
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};
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/**
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* Execute the generator function or a generator
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* and return a promise.
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*
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* @param {Function} fn
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* @return {Promise}
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* @api public
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*/
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function co(gen) {
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var ctx = this;
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var args = slice.call(arguments, 1);
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// we wrap everything in a promise to avoid promise chaining,
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// which leads to memory leak errors.
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// see https://github.com/tj/co/issues/180
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return new Promise(function(resolve, reject) {
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if (typeof gen === 'function') gen = gen.apply(ctx, args);
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if (!gen || typeof gen.next !== 'function') return resolve(gen);
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onFulfilled();
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/**
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* @param {Mixed} res
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* @return {Promise}
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* @api private
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*/
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function onFulfilled(res) {
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var ret;
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try {
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ret = gen.next(res);
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} catch (e) {
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return reject(e);
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}
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next(ret);
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return null;
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}
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/**
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* @param {Error} err
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* @return {Promise}
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* @api private
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*/
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function onRejected(err) {
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var ret;
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try {
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ret = gen.throw(err);
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} catch (e) {
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return reject(e);
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}
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next(ret);
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}
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/**
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* Get the next value in the generator,
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* return a promise.
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*
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* @param {Object} ret
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* @return {Promise}
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* @api private
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*/
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function next(ret) {
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if (ret.done) return resolve(ret.value);
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var value = toPromise.call(ctx, ret.value);
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if (value && isPromise(value)) return value.then(onFulfilled, onRejected);
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return onRejected(new TypeError('You may only yield a function, promise, generator, array, or object, '
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+ 'but the following object was passed: "' + String(ret.value) + '"'));
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}
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});
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}
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/**
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* Convert a `yield`ed value into a promise.
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*
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* @param {Mixed} obj
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* @return {Promise}
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* @api private
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*/
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function toPromise(obj) {
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if (!obj) return obj;
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if (isPromise(obj)) return obj;
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if (isGeneratorFunction(obj) || isGenerator(obj)) return co.call(this, obj);
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if ('function' == typeof obj) return thunkToPromise.call(this, obj);
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if (Array.isArray(obj)) return arrayToPromise.call(this, obj);
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if (isObject(obj)) return objectToPromise.call(this, obj);
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return obj;
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}
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/**
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* Convert a thunk to a promise.
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*
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* @param {Function}
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* @return {Promise}
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* @api private
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*/
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function thunkToPromise(fn) {
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var ctx = this;
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return new Promise(function (resolve, reject) {
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fn.call(ctx, function (err, res) {
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if (err) return reject(err);
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if (arguments.length > 2) res = slice.call(arguments, 1);
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resolve(res);
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});
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});
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}
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/**
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* Convert an array of "yieldables" to a promise.
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* Uses `Promise.all()` internally.
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*
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* @param {Array} obj
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* @return {Promise}
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* @api private
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*/
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function arrayToPromise(obj) {
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return Promise.all(obj.map(toPromise, this));
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}
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/**
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* Convert an object of "yieldables" to a promise.
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* Uses `Promise.all()` internally.
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*
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* @param {Object} obj
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* @return {Promise}
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* @api private
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*/
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function objectToPromise(obj){
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var results = new obj.constructor();
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var keys = Object.keys(obj);
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var promises = [];
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for (var i = 0; i < keys.length; i++) {
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var key = keys[i];
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var promise = toPromise.call(this, obj[key]);
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if (promise && isPromise(promise)) defer(promise, key);
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else results[key] = obj[key];
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}
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return Promise.all(promises).then(function () {
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return results;
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});
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function defer(promise, key) {
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// predefine the key in the result
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results[key] = undefined;
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promises.push(promise.then(function (res) {
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results[key] = res;
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}));
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}
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}
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/**
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* Check if `obj` is a promise.
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*
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* @param {Object} obj
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* @return {Boolean}
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* @api private
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*/
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function isPromise(obj) {
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return 'function' == typeof obj.then;
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}
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/**
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* Check if `obj` is a generator.
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*
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* @param {Mixed} obj
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* @return {Boolean}
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* @api private
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*/
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function isGenerator(obj) {
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return 'function' == typeof obj.next && 'function' == typeof obj.throw;
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}
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/**
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* Check if `obj` is a generator function.
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*
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* @param {Mixed} obj
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* @return {Boolean}
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* @api private
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*/
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function isGeneratorFunction(obj) {
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var constructor = obj.constructor;
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if (!constructor) return false;
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if ('GeneratorFunction' === constructor.name || 'GeneratorFunction' === constructor.displayName) return true;
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return isGenerator(constructor.prototype);
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}
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/**
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* Check for plain object.
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*
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* @param {Mixed} val
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* @return {Boolean}
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* @api private
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*/
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function isObject(val) {
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return Object == val.constructor;
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}
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module.exports = require('./co')
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@ -3,7 +3,8 @@ import { Terminal } from '@xterm/xterm';
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import { FitAddon } from '@xterm/addon-fit';
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import { SerializeAddon } from '@xterm/addon-serialize';
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import JSZM from "../../lib/zork";
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var co = require("../../lib/co/index.js");
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// var co = require("../../lib/co/index.js");
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import co from "../../lib/co";
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export class DebugWidget implements FarpatchWidget {
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name: string;
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@ -79,15 +80,15 @@ export class DebugWidget implements FarpatchWidget {
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var debugWidget = this;
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fetch("/zork1.z3").then((response) => {
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response.arrayBuffer().then((buffer) => {
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this.zork = co.co(function* () {
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this.zork = co(function* () {
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var zork = new JSZM(new Uint8Array(buffer));
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zork.print = function* (str: string) {
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str = str.replace("\n", "\r\n");
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zorkTerminal.write(str);
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};
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zork.read = function* (maxlen: number): Generator {
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zork.read = function* (_maxlen: number): Generator {
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// console.log("Zork: read " + maxlen);
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var val = yield new Promise((resolve, reject) => {
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var val = yield new Promise((resolve, _reject) => {
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debugWidget.zorkCallback = resolve;
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});
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return val;
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