diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..c2658d7 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +node_modules/ diff --git a/.npmignore b/.npmignore new file mode 100644 index 0000000..c2658d7 --- /dev/null +++ b/.npmignore @@ -0,0 +1 @@ +node_modules/ diff --git a/README.md b/README.md new file mode 100644 index 0000000..3c97219 --- /dev/null +++ b/README.md @@ -0,0 +1,43 @@ +# A Tale Of Three Lists + +A sorta-sophisticated but still silly async events processing demo. + +The demo simulates a feed of data that's sampled at different speeds, filtered into two lists (red and blue). You can select an item from either list and it's added to your saved list in the middle. Selected duplicates are marked off and then removed. + +screenshot of demo + +## Why + +The goal of this project is to sort of be the [TodoMVC](http://todomvc.com/) of async programming. I've seeded the repo with 7 implementations of the same demo, each using a different async pattern. + +The code is organized in such a way that there's as much overlap between the implementations as possible. This is intentional. It helps reduce the noise of difference, so that you can focus on only the important things: **the different strengths and weaknesses of each async pattern.** + +I invite all visitors to study the code and do side-by-side comparisons between the different implementations, to see those pros/cons for yourself. + +I will also be adding more detailed write-ups of these differences over time, as well as new implementations if there are significant (not just trivial syntax sugar) differences to be illustrated. Suggestions are welcomed! + +## Compared Patterns + +The following patterns are currently implemented for inspection/comparison: + +* [Plain Callbacks](tree/master/callback/): the old-school tried-and-true callback +* [Thunks](tree/master/thunk/): thunks are using closure to make a function into an async-capable container for future values (like a promise without the API) +* [Promises](tree/master/promise/): using only bare ES6 promises +* [Promises+Generators](tree/master/promise-generator/): combining promises & generators, assisted by [asynquence](http://github.com/getify/asynquence)'s generator processing. +* [asynquence Flavored](tree/master/asynquence/): adding in the spice and flavor that [asynquence](http://github.com/getify/asynquence) brings to async programming. +* [Reactive Sequences (Observables)](tree/master/reactive-sequence/): showing [asynquence](http://github.com/getify/asynquence)'s flavor of observables, called "reactive sequences". +* [CSP](tree/master/csp/): showing [asynquence](http://github.com/getify/asynquence)'s emulation of [CSP](https://github.com/getify/asynquence/tree/master/contrib#go-style-csp-api-emulation) (channel-based concurrency). + +## Not A UI/Framework Bikeshed + +I use simple jQuery and CSS for the UI of this demo. I don't want that to change. This project is not about comparing different frameworks' approaches to managing and rendering the UI. + +That'd be a fun project for you to fork off this one, and compare Angular, React, Backbone, Ember, etc for the UI processing of the lists, kinda like TodoMVC does. + +But this project is about exploring the relative merits and shortcomings of each async pattern approach. Any other differences would be unnecessary distracting noise. + +## License + +The code and all the documentation are released under the MIT license. + +http://getify.mit-license.org/ diff --git a/asynquence/dummy-data.js b/asynquence/dummy-data.js new file mode 100644 index 0000000..31c2a85 --- /dev/null +++ b/asynquence/dummy-data.js @@ -0,0 +1,16 @@ +var ItemsText = (function(){ + + var words = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent vulputate consectetur sem sed efficitur. Nulla ac egestas velit. Cras elementum orci vel sodales dapibus. Etiam tempus ac mi eu elementum. Proin nibh lorem, luctus eget dolor eget, sollicitudin pharetra velit. Quisque scelerisque libero ut elit consectetur, vel placerat diam finibus. Vestibulum vitae velit eget orci mattis bibendum id sed nibh. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam bibendum nibh at nisi ullamcorper euismod. Phasellus sed varius metus. Nullam pretium ex id augue ultricies condimentum. Nunc nisl arcu, placerat quis condimentum in, consequat vel lectus. Pellentesque ullamcorper sed enim quis congue. Pellentesque et elit in dui fermentum tempor. Praesent enim quam, viverra sed ipsum non, iaculis aliquet libero. Maecenas quis egestas sem. Sed sit amet malesuada turpis. Nam tempor velit at nisi lacinia, at vestibulum dolor bibendum. Sed venenatis in eros quis blandit. Maecenas nec aliquet ex, at accumsan quam. Vestibulum semper, libero ac rhoncus facilisis, augue diam interdum ex, in eleifend turpis lorem euismod sem. Vivamus sit amet ipsum et nunc dignissim tincidunt vel eget risus. Sed et nunc tempus, cursus ante eget, egestas quam. Integer turpis nulla, rutrum a nunc non, maximus malesuada massa. Suspendisse vel egestas felis. Donec vehicula neque augue, sit amet mattis nulla pellentesque eu. Vestibulum gravida malesuada rhoncus. Curabitur rhoncus diam nunc, non dignissim risus ultrices at. Cras id ligula mattis, scelerisque diam nec, sagittis nibh. Quisque malesuada ipsum at magna molestie, ac ultricies ante consectetur. Vivamus turpis neque, faucibus et molestie vulputate, dictum at diam. Ut et massa vitae neque ultricies rutrum. Donec aliquet elementum tincidunt. In viverra sem ante, vel imperdiet nisi facilisis non. Nunc interdum, urna at tempor semper, sapien justo feugiat nisl, condimentum finibus metus nibh in diam. Aliquam erat volutpat. Maecenas ut felis euismod, vehicula augue ut, aliquet lorem. Suspendisse iaculis, magna nec ullamcorper rhoncus, sapien ex pellentesque odio, ut interdum ante sapien eu erat. Donec quam orci, aliquet eu varius in, tincidunt eu est. Proin vitae est a lectus congue laoreet. Vestibulum id sodales mauris. Vestibulum eu lacus a felis tempus fringilla eu et nunc. Curabitur et imperdiet enim. Vivamus sollicitudin efficitur risus hendrerit euismod. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Nam sed auctor velit, sit amet facilisis nunc. Donec vestibulum convallis neque sed eleifend. Cras dapibus quis sem id sodales. Maecenas metus massa, facilisis quis scelerisque vel, commodo molestie enim. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Maecenas pulvinar ultrices nulla, vel convallis ex laoreet vel. Sed ornare dui eget ante luctus, mollis vehicula neque pulvinar. Nulla posuere, quam quis dapibus rutrum, arcu massa laoreet metus, at condimentum felis justo a est. Nullam pharetra est nunc, a accumsan metus pellentesque ut. Duis auctor justo sit amet tincidunt iaculis. Pellentesque sollicitudin mauris ut ligula suscipit sagittis. Nullam scelerisque tortor sed sem egestas, non auctor nulla fermentum. Aliquam ut nunc condimentum, pellentesque quam feugiat, lacinia elit. Fusce maximus nulla id justo efficitur, congue imperdiet purus feugiat. Pellentesque egestas ultrices tempus. Vestibulum interdum accumsan nulla quis ornare. Duis cursus vel ipsum nec mattis. Donec quam eros, convallis condimentum iaculis a, egestas id tellus. Nullam imperdiet velit sed purus porta, vitae vulputate elit vulputate. Vivamus in maximus libero. Etiam condimentum hendrerit bibendum. Morbi id urna eu erat placerat iaculis. Donec a vehicula purus, a tempus lacus. Mauris quis auctor metus. Maecenas id venenatis libero, nec faucibus est. Sed auctor scelerisque augue, vel efficitur sem sollicitudin quis. Aliquam non justo eu diam convallis posuere. Quisque consequat porta nulla. Nunc lacinia, eros pulvinar dictum mattis, justo lorem finibus nibh, non pellentesque justo metus vitae ligula. Interdum et malesuada fames ac ante ipsum primis in faucibus. Phasellus ac interdum lorem, in elementum mi. Suspendisse auctor ex eget efficitur porta. Nam mollis lectus a ipsum gravida, eget hendrerit metus blandit. Suspendisse potenti. Quisque aliquet augue ut facilisis porttitor. Ut dui felis, interdum vitae lectus sit amet, consequat accumsan felis. Etiam malesuada ipsum vitae lacinia condimentum. Aliquam ac turpis eu risus tincidunt molestie. Sed ac leo libero. Quisque rutrum lacus sit amet augue eleifend sollicitudin. Nulla facilisi. Praesent egestas tortor et nibh rutrum accumsan. Suspendisse potenti. Proin vehicula massa id pretium aliquet. Nunc sed euismod justo, a ullamcorper odio. In ullamcorper diam ut leo pellentesque, at sollicitudin dolor suscipit. Interdum et malesuada fames ac ante ipsum primis in faucibus. Proin felis leo, mollis ut eros ut, dapibus imperdiet diam. Donec iaculis placerat ante, ac commodo nibh luctus id. Suspendisse iaculis feugiat massa quis vehicula. Mauris consequat finibus posuere. Aenean non turpis et quam luctus mattis a id enim. Ut ullamcorper, felis et ultricies lobortis, velit tellus mattis justo, a malesuada odio turpis at nisl. In sed augue maximus, bibendum tellus nec, maximus sapien. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut sem lorem, rhoncus a congue a, tempor nec metus. Suspendisse potenti. Curabitur ultrices pretium odio, et sollicitudin mauris vehicula in. Aenean sed semper neque, vitae lobortis lectus. In id interdum velit. Duis tempus purus diam, vitae tincidunt lacus commodo egestas. Morbi vestibulum, magna eget sollicitudin efficitur, ex libero consectetur odio, sollicitudin tincidunt mauris ante ac velit. Mauris a augue lacus. In bibendum, dui a pellentesque sagittis, tortor risus dignissim enim, eu tristique velit odio sit amet ex. Cras eros leo, convallis sit amet posuere vel, lacinia at enim. Maecenas nec feugiat ipsum. Nunc pellentesque tortor vitae mauris dictum imperdiet. Phasellus porttitor lectus vel neque sollicitudin, nec commodo leo faucibus. Aliquam dignissim ut est in vulputate. Donec ultrices, ex ac molestie porta, ligula sem efficitur velit, at pretium nisl tellus vel nisi. Sed volutpat nisi sed risus vulputate efficitur. Praesent venenatis nisl quis diam condimentum aliquet. Vestibulum et turpis tincidunt, pharetra urna id, egestas diam. Aliquam vitae gravida enim, eu scelerisque dolor. Nunc placerat vitae nisi eget commodo. In tincidunt viverra pellentesque. Duis a lacinia felis. Sed pharetra nibh eget diam finibus, a euismod ipsum placerat."; + + return { + more: function() { + var start = Math.trunc( Math.random() * 1E9 ) % + (words.length - 200); + var text = words.substr(start).match( + /(?:^|(?:\.\s+))((?:[A-Z][^\.]+\.(?:\s+|$)){3})/ + ); + return text ? text[0].replace(/^\.\s+/,"") : next(); + } + }; + +})(); diff --git a/asynquence/eventemitter2.js b/asynquence/eventemitter2.js new file mode 100644 index 0000000..bde69e8 --- /dev/null +++ b/asynquence/eventemitter2.js @@ -0,0 +1,573 @@ +/*! + * EventEmitter2 + * https://github.com/hij1nx/EventEmitter2 + * + * Copyright (c) 2013 hij1nx + * Licensed under the MIT license. + */ +;!function(undefined) { + + var isArray = Array.isArray ? Array.isArray : function _isArray(obj) { + return Object.prototype.toString.call(obj) === "[object Array]"; + }; + var defaultMaxListeners = 10; + + function init() { + this._events = {}; + if (this._conf) { + configure.call(this, this._conf); + } + } + + function configure(conf) { + if (conf) { + + this._conf = conf; + + conf.delimiter && (this.delimiter = conf.delimiter); + conf.maxListeners && (this._events.maxListeners = conf.maxListeners); + conf.wildcard && (this.wildcard = conf.wildcard); + conf.newListener && (this.newListener = conf.newListener); + + if (this.wildcard) { + this.listenerTree = {}; + } + } + } + + function EventEmitter(conf) { + this._events = {}; + this.newListener = false; + configure.call(this, conf); + } + + // + // Attention, function return type now is array, always ! + // It has zero elements if no any matches found and one or more + // elements (leafs) if there are matches + // + function searchListenerTree(handlers, type, tree, i) { + if (!tree) { + return []; + } + var listeners=[], leaf, len, branch, xTree, xxTree, isolatedBranch, endReached, + typeLength = type.length, currentType = type[i], nextType = type[i+1]; + if (i === typeLength && tree._listeners) { + // + // If at the end of the event(s) list and the tree has listeners + // invoke those listeners. + // + if (typeof tree._listeners === 'function') { + handlers && handlers.push(tree._listeners); + return [tree]; + } else { + for (leaf = 0, len = tree._listeners.length; leaf < len; leaf++) { + handlers && handlers.push(tree._listeners[leaf]); + } + return [tree]; + } + } + + if ((currentType === '*' || currentType === '**') || tree[currentType]) { + // + // If the event emitted is '*' at this part + // or there is a concrete match at this patch + // + if (currentType === '*') { + for (branch in tree) { + if (branch !== '_listeners' && tree.hasOwnProperty(branch)) { + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i+1)); + } + } + return listeners; + } else if(currentType === '**') { + endReached = (i+1 === typeLength || (i+2 === typeLength && nextType === '*')); + if(endReached && tree._listeners) { + // The next element has a _listeners, add it to the handlers. + listeners = listeners.concat(searchListenerTree(handlers, type, tree, typeLength)); + } + + for (branch in tree) { + if (branch !== '_listeners' && tree.hasOwnProperty(branch)) { + if(branch === '*' || branch === '**') { + if(tree[branch]._listeners && !endReached) { + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], typeLength)); + } + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i)); + } else if(branch === nextType) { + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i+2)); + } else { + // No match on this one, shift into the tree but not in the type array. + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i)); + } + } + } + return listeners; + } + + listeners = listeners.concat(searchListenerTree(handlers, type, tree[currentType], i+1)); + } + + xTree = tree['*']; + if (xTree) { + // + // If the listener tree will allow any match for this part, + // then recursively explore all branches of the tree + // + searchListenerTree(handlers, type, xTree, i+1); + } + + xxTree = tree['**']; + if(xxTree) { + if(i < typeLength) { + if(xxTree._listeners) { + // If we have a listener on a '**', it will catch all, so add its handler. + searchListenerTree(handlers, type, xxTree, typeLength); + } + + // Build arrays of matching next branches and others. + for(branch in xxTree) { + if(branch !== '_listeners' && xxTree.hasOwnProperty(branch)) { + if(branch === nextType) { + // We know the next element will match, so jump twice. + searchListenerTree(handlers, type, xxTree[branch], i+2); + } else if(branch === currentType) { + // Current node matches, move into the tree. + searchListenerTree(handlers, type, xxTree[branch], i+1); + } else { + isolatedBranch = {}; + isolatedBranch[branch] = xxTree[branch]; + searchListenerTree(handlers, type, { '**': isolatedBranch }, i+1); + } + } + } + } else if(xxTree._listeners) { + // We have reached the end and still on a '**' + searchListenerTree(handlers, type, xxTree, typeLength); + } else if(xxTree['*'] && xxTree['*']._listeners) { + searchListenerTree(handlers, type, xxTree['*'], typeLength); + } + } + + return listeners; + } + + function growListenerTree(type, listener) { + + type = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + + // + // Looks for two consecutive '**', if so, don't add the event at all. + // + for(var i = 0, len = type.length; i+1 < len; i++) { + if(type[i] === '**' && type[i+1] === '**') { + return; + } + } + + var tree = this.listenerTree; + var name = type.shift(); + + while (name) { + + if (!tree[name]) { + tree[name] = {}; + } + + tree = tree[name]; + + if (type.length === 0) { + + if (!tree._listeners) { + tree._listeners = listener; + } + else if(typeof tree._listeners === 'function') { + tree._listeners = [tree._listeners, listener]; + } + else if (isArray(tree._listeners)) { + + tree._listeners.push(listener); + + if (!tree._listeners.warned) { + + var m = defaultMaxListeners; + + if (typeof this._events.maxListeners !== 'undefined') { + m = this._events.maxListeners; + } + + if (m > 0 && tree._listeners.length > m) { + + tree._listeners.warned = true; + console.error('(node) warning: possible EventEmitter memory ' + + 'leak detected. %d listeners added. ' + + 'Use emitter.setMaxListeners() to increase limit.', + tree._listeners.length); + console.trace(); + } + } + } + return true; + } + name = type.shift(); + } + return true; + } + + // By default EventEmitters will print a warning if more than + // 10 listeners are added to it. This is a useful default which + // helps finding memory leaks. + // + // Obviously not all Emitters should be limited to 10. This function allows + // that to be increased. Set to zero for unlimited. + + EventEmitter.prototype.delimiter = '.'; + + EventEmitter.prototype.setMaxListeners = function(n) { + this._events || init.call(this); + this._events.maxListeners = n; + if (!this._conf) this._conf = {}; + this._conf.maxListeners = n; + }; + + EventEmitter.prototype.event = ''; + + EventEmitter.prototype.once = function(event, fn) { + this.many(event, 1, fn); + return this; + }; + + EventEmitter.prototype.many = function(event, ttl, fn) { + var self = this; + + if (typeof fn !== 'function') { + throw new Error('many only accepts instances of Function'); + } + + function listener() { + if (--ttl === 0) { + self.off(event, listener); + } + fn.apply(this, arguments); + } + + listener._origin = fn; + + this.on(event, listener); + + return self; + }; + + EventEmitter.prototype.emit = function() { + + this._events || init.call(this); + + var type = arguments[0]; + + if (type === 'newListener' && !this.newListener) { + if (!this._events.newListener) { return false; } + } + + // Loop through the *_all* functions and invoke them. + if (this._all) { + var l = arguments.length; + var args = new Array(l - 1); + for (var i = 1; i < l; i++) args[i - 1] = arguments[i]; + for (i = 0, l = this._all.length; i < l; i++) { + this.event = type; + this._all[i].apply(this, args); + } + } + + // If there is no 'error' event listener then throw. + if (type === 'error') { + + if (!this._all && + !this._events.error && + !(this.wildcard && this.listenerTree.error)) { + + if (arguments[1] instanceof Error) { + throw arguments[1]; // Unhandled 'error' event + } else { + throw new Error("Uncaught, unspecified 'error' event."); + } + return false; + } + } + + var handler; + + if(this.wildcard) { + handler = []; + var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + searchListenerTree.call(this, handler, ns, this.listenerTree, 0); + } + else { + handler = this._events[type]; + } + + if (typeof handler === 'function') { + this.event = type; + if (arguments.length === 1) { + handler.call(this); + } + else if (arguments.length > 1) + switch (arguments.length) { + case 2: + handler.call(this, arguments[1]); + break; + case 3: + handler.call(this, arguments[1], arguments[2]); + break; + // slower + default: + var l = arguments.length; + var args = new Array(l - 1); + for (var i = 1; i < l; i++) args[i - 1] = arguments[i]; + handler.apply(this, args); + } + return true; + } + else if (handler) { + var l = arguments.length; + var args = new Array(l - 1); + for (var i = 1; i < l; i++) args[i - 1] = arguments[i]; + + var listeners = handler.slice(); + for (var i = 0, l = listeners.length; i < l; i++) { + this.event = type; + listeners[i].apply(this, args); + } + return (listeners.length > 0) || !!this._all; + } + else { + return !!this._all; + } + + }; + + EventEmitter.prototype.on = function(type, listener) { + + if (typeof type === 'function') { + this.onAny(type); + return this; + } + + if (typeof listener !== 'function') { + throw new Error('on only accepts instances of Function'); + } + this._events || init.call(this); + + // To avoid recursion in the case that type == "newListeners"! Before + // adding it to the listeners, first emit "newListeners". + this.emit('newListener', type, listener); + + if(this.wildcard) { + growListenerTree.call(this, type, listener); + return this; + } + + if (!this._events[type]) { + // Optimize the case of one listener. Don't need the extra array object. + this._events[type] = listener; + } + else if(typeof this._events[type] === 'function') { + // Adding the second element, need to change to array. + this._events[type] = [this._events[type], listener]; + } + else if (isArray(this._events[type])) { + // If we've already got an array, just append. + this._events[type].push(listener); + + // Check for listener leak + if (!this._events[type].warned) { + + var m = defaultMaxListeners; + + if (typeof this._events.maxListeners !== 'undefined') { + m = this._events.maxListeners; + } + + if (m > 0 && this._events[type].length > m) { + + this._events[type].warned = true; + console.error('(node) warning: possible EventEmitter memory ' + + 'leak detected. %d listeners added. ' + + 'Use emitter.setMaxListeners() to increase limit.', + this._events[type].length); + console.trace(); + } + } + } + return this; + }; + + EventEmitter.prototype.onAny = function(fn) { + + if (typeof fn !== 'function') { + throw new Error('onAny only accepts instances of Function'); + } + + if(!this._all) { + this._all = []; + } + + // Add the function to the event listener collection. + this._all.push(fn); + return this; + }; + + EventEmitter.prototype.addListener = EventEmitter.prototype.on; + + EventEmitter.prototype.off = function(type, listener) { + if (typeof listener !== 'function') { + throw new Error('removeListener only takes instances of Function'); + } + + var handlers,leafs=[]; + + if(this.wildcard) { + var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + leafs = searchListenerTree.call(this, null, ns, this.listenerTree, 0); + } + else { + // does not use listeners(), so no side effect of creating _events[type] + if (!this._events[type]) return this; + handlers = this._events[type]; + leafs.push({_listeners:handlers}); + } + + for (var iLeaf=0; iLeaf 0) { + fns = this._all; + for(i = 0, l = fns.length; i < l; i++) { + if(fn === fns[i]) { + fns.splice(i, 1); + return this; + } + } + } else { + this._all = []; + } + return this; + }; + + EventEmitter.prototype.removeListener = EventEmitter.prototype.off; + + EventEmitter.prototype.removeAllListeners = function(type) { + if (arguments.length === 0) { + !this._events || init.call(this); + return this; + } + + if(this.wildcard) { + var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + var leafs = searchListenerTree.call(this, null, ns, this.listenerTree, 0); + + for (var iLeaf=0; iLeaf + + + +A Tale Of Three Lists (asynquence) + + + +

A Tale Of Three Lists (asynquence)

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+
+ +
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padding: 5px 15px; + margin: 0px 30px; + display: inline-block; + position: relative; + width: 400px; + height: 500px; + border: 3px solid #000; + background-color: #f0f0f0; + vertical-align: top; +} + +#feed-1 > .content, +#feed-2 > .content, +#my-feed > .content { + position: relative; + width: 100%; + height: 100%; + overflow-y: scroll; +} + +.item { + display: block; + position: relative; + margin: 10px 0px; + padding: 5px; + width: 100%; + color: #000; + overflow: hidden; + white-space: nowrap; + text-decoration: none; + text-overflow: ellipsis; +} + +.item.floating { + cursor: default; + position: absolute; + transition: left 0.3s ease-out, top 0.3s ease-out; + max-width: 214px; + max-height: 100px; +} + +.item.killed { + text-decoration: line-through; +} + +#feed-1 > .content > .item, +#feed-2 > .content > .item { + max-height: 100px; +} + +#feed-1 > .content > .item:hover, +#feed-2 > .content > .item:hover { + background-color: rgba(0,0,0,0.1); +} + +#my-feed > .content > .item { + cursor: default; + max-height: inherit; + white-space: normal; + overflow: auto; + text-overflow: inherit; +} + +.first-list { + background-color: #ffb8b3; +} + +.second-list { + background-color: #b3caff; +} diff --git a/asynquence/ui.js b/asynquence/ui.js new file mode 100644 index 0000000..2655c99 --- /dev/null +++ b/asynquence/ui.js @@ -0,0 +1,238 @@ +(function UI(global){ + "use strict"; + + var $body, $feed_1, $feed_2, $my_feed, + $feed_1_content, $feed_2_content, + $my_feed_content, + + // signal event handler(s) + toggle_clicks, + item_clicks, + + // sequence wrapper(s) + rAF, + docready; + + // pubsub hub + global.EVT = new EventEmitter2(); + + // run everything! + ASQ().runner(setup); + + + // *********************************** + + function *setup() { + // sequence-wrapper for requestAnimationFrame event + // note: this is a one-time event, so sequence OK + rAF = function rAF() { + return ASQ(function asq(done){ + requestAnimationFrame(done); + }); + }, + + // sequence-wrapper for DOM-ready event + // note: this is a one-time event, so sequence OK + docready = function docready() { + return ASQ(function asq(done){ + $(document).ready(done); + }); + }; + + // DOM event handlers from sequences + toggle_clicks = sequenceBasedEventHandler(function *setupToggleClicks(sq){ + toggleFeed( yield sq ); + }); + item_clicks = sequenceBasedEventHandler(function *setupItemClicks(sq){ + selectItem( yield sq ); + }); + + // wait for DOM-ready + yield docready(); + + $body = $(document.body); + + $feed_1 = $("[rel*=js-feed-1]"); + $feed_1_content = $feed_1.children("[rel*=js-content]"); + $feed_1.children("[rel*=js-toggle]") + .on("click",toggle_clicks); + + $feed_2 = $("[rel*=js-feed-2]"); + $feed_2_content = $feed_2.children("[rel*=js-content]"); + $feed_2.children("[rel*=js-toggle]") + .on("click",toggle_clicks); + + $my_feed = $("[rel*=js-my-feed]"); + $my_feed_content = $my_feed.children("[rel*=js-content]"); + $my_feed_content.on("click","[rel*=js-item]",noop); + + $feed_1.on("click","[rel*=js-item]",item_clicks); + $feed_2.on("click","[rel*=js-item]",item_clicks); + + EVT.on("feed-insertion",insertFeedItem); + EVT.on("my-feed-insertion",ASQ.wrap(insertMyFeedItem,{ gen: true, spread: true })); + EVT.on("feed-kill",ASQ.wrap(killFeedItem,{ gen: true, spread: true })); + + // signal the feeds setup to proceed + EVT.emit("setup-feeds"); + } + + function toggleFeed($btn) { + var $feed = $btn.closest("[rel*=js-feed-]"); + var feed_id = Number( $feed.attr("rel").substr(8) ); + var running = ($feed.attr("data-paused") !== "true"); + + // currently running feed? + if (running) { + // pause it + $feed.attr({ "data-paused": "true" }); + $btn.text("resume"); + } + // paused feed + else { + // resume it + $feed.removeAttr("data-paused"); + $btn.text("pause list"); + } + + // signal status message + EVT.emit("status-" + feed_id,!running); + } + + function insertFeedItem(feedID,itemText) { + var $content; + + // which feed to insert into? + if (feedID == 1) $content = $feed_1_content; + else if (feedID == 2) $content = $feed_2_content; + + var $item = $("") + .addClass("item") + .attr({ href: "#", rel: "js-item" }) + .text(itemText); + + $content.prepend($item); + + var $items = $content.children("[rel*=js-item]"); + if ($items.length > 20) { + $items.last().remove(); + } + } + + function selectItem($item) { + // item not yet killed? + if (!$item.is(".killed")) { + var $feed = $item.closest("[rel*=js-feed-]"); + var feed_id = Number( $feed.attr("rel").substr(8) ); + + // signal item selection + EVT.emit("item-selection",feed_id,$item.text(),$item); + } + } + + function *insertMyFeedItem(feed_id,$item) { + var $floating_item = $item.clone().addClass("floating"); + + if (feed_id == 1) $floating_item.addClass("first-list"); + else if (feed_id == 2) $floating_item.addClass("second-list"); + + var item_dims = $item.offset(); + var item_margin_left = parseInt($item.css("margin-left"),10); + var item_margin_top = parseInt($item.css("margin-top"),10); + + $floating_item.css({ + left: (Math.round(item_dims.left) - item_margin_left) + "px", + top: (Math.round(item_dims.top) - item_margin_top) + "px" + }) + .appendTo($body); + + $item.remove(); + + // wait for the next animation frame (CSS junk) + yield rAF(); + + var my_feed_dims = $my_feed_content.offset(); + + $floating_item.css({ + left: Math.round(my_feed_dims.left) + "px", + top: Math.round(my_feed_dims.top) + "px" + }); + + // wait for the transition to end + yield fromEventOnce($floating_item,"transitionend"); + + $floating_item + .unbind("transitionend") + .css({ left: "", top: "" }) + .removeClass("floating") + .prependTo($my_feed_content); + } + + function *killFeedItem($item) { + $item.addClass("killed"); + + // wait for a second + yield ASQ.after(1000); + + $item.remove(); + } + + // bridge DOM events to sequences + function fromEventOnce($el,evtName,defineSequenceChain) { + var sq = ASQ.iterable(); + + $el.on(evtName,onevt); + + return sq; + + + // *********************************** + + function onevt(evt) { + noop(evt); + + // unbind event handler since sequences are + // resolvable only once + $el.off(evtName,onevt); + + sq.next($(evt.target)); + } + } + + function sequenceBasedEventHandler(defineSequenceChain) { + var sq; + + defineSequenceChain = ASQ.wrap(defineSequenceChain,{ gen: true, spread: true }); + + // start out with a sequence + getNextSequence(); + + return eventHandler; + + // *********************************** + + function eventHandler(evt) { + noop(evt); + + // resolve previous sequence + sq.next($(evt.target)); + + // get the next sequence ready in case + // this event fires again + getNextSequence(); + } + + function getNextSequence() { + sq = ASQ.iterable(); + + defineSequenceChain(ASQ.messages(sq)); + } + } + + function noop(evt) { + evt.preventDefault(); + evt.stopPropagation(); + evt.stopImmediatePropagation(); + } + +})(window); diff --git a/callback/dummy-data.js b/callback/dummy-data.js new file mode 100644 index 0000000..31c2a85 --- /dev/null +++ b/callback/dummy-data.js @@ -0,0 +1,16 @@ +var ItemsText = (function(){ + + var words = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent vulputate consectetur sem sed efficitur. Nulla ac egestas velit. Cras elementum orci vel sodales dapibus. Etiam tempus ac mi eu elementum. Proin nibh lorem, luctus eget dolor eget, sollicitudin pharetra velit. Quisque scelerisque libero ut elit consectetur, vel placerat diam finibus. Vestibulum vitae velit eget orci mattis bibendum id sed nibh. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam bibendum nibh at nisi ullamcorper euismod. Phasellus sed varius metus. Nullam pretium ex id augue ultricies condimentum. Nunc nisl arcu, placerat quis condimentum in, consequat vel lectus. Pellentesque ullamcorper sed enim quis congue. Pellentesque et elit in dui fermentum tempor. Praesent enim quam, viverra sed ipsum non, iaculis aliquet libero. Maecenas quis egestas sem. Sed sit amet malesuada turpis. Nam tempor velit at nisi lacinia, at vestibulum dolor bibendum. Sed venenatis in eros quis blandit. Maecenas nec aliquet ex, at accumsan quam. Vestibulum semper, libero ac rhoncus facilisis, augue diam interdum ex, in eleifend turpis lorem euismod sem. Vivamus sit amet ipsum et nunc dignissim tincidunt vel eget risus. Sed et nunc tempus, cursus ante eget, egestas quam. Integer turpis nulla, rutrum a nunc non, maximus malesuada massa. Suspendisse vel egestas felis. Donec vehicula neque augue, sit amet mattis nulla pellentesque eu. Vestibulum gravida malesuada rhoncus. Curabitur rhoncus diam nunc, non dignissim risus ultrices at. Cras id ligula mattis, scelerisque diam nec, sagittis nibh. Quisque malesuada ipsum at magna molestie, ac ultricies ante consectetur. Vivamus turpis neque, faucibus et molestie vulputate, dictum at diam. Ut et massa vitae neque ultricies rutrum. Donec aliquet elementum tincidunt. In viverra sem ante, vel imperdiet nisi facilisis non. Nunc interdum, urna at tempor semper, sapien justo feugiat nisl, condimentum finibus metus nibh in diam. Aliquam erat volutpat. Maecenas ut felis euismod, vehicula augue ut, aliquet lorem. Suspendisse iaculis, magna nec ullamcorper rhoncus, sapien ex pellentesque odio, ut interdum ante sapien eu erat. Donec quam orci, aliquet eu varius in, tincidunt eu est. Proin vitae est a lectus congue laoreet. Vestibulum id sodales mauris. Vestibulum eu lacus a felis tempus fringilla eu et nunc. Curabitur et imperdiet enim. Vivamus sollicitudin efficitur risus hendrerit euismod. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Nam sed auctor velit, sit amet facilisis nunc. Donec vestibulum convallis neque sed eleifend. Cras dapibus quis sem id sodales. Maecenas metus massa, facilisis quis scelerisque vel, commodo molestie enim. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Maecenas pulvinar ultrices nulla, vel convallis ex laoreet vel. Sed ornare dui eget ante luctus, mollis vehicula neque pulvinar. Nulla posuere, quam quis dapibus rutrum, arcu massa laoreet metus, at condimentum felis justo a est. Nullam pharetra est nunc, a accumsan metus pellentesque ut. Duis auctor justo sit amet tincidunt iaculis. Pellentesque sollicitudin mauris ut ligula suscipit sagittis. Nullam scelerisque tortor sed sem egestas, non auctor nulla fermentum. Aliquam ut nunc condimentum, pellentesque quam feugiat, lacinia elit. Fusce maximus nulla id justo efficitur, congue imperdiet purus feugiat. Pellentesque egestas ultrices tempus. Vestibulum interdum accumsan nulla quis ornare. Duis cursus vel ipsum nec mattis. Donec quam eros, convallis condimentum iaculis a, egestas id tellus. Nullam imperdiet velit sed purus porta, vitae vulputate elit vulputate. Vivamus in maximus libero. Etiam condimentum hendrerit bibendum. Morbi id urna eu erat placerat iaculis. Donec a vehicula purus, a tempus lacus. Mauris quis auctor metus. Maecenas id venenatis libero, nec faucibus est. Sed auctor scelerisque augue, vel efficitur sem sollicitudin quis. Aliquam non justo eu diam convallis posuere. Quisque consequat porta nulla. Nunc lacinia, eros pulvinar dictum mattis, justo lorem finibus nibh, non pellentesque justo metus vitae ligula. Interdum et malesuada fames ac ante ipsum primis in faucibus. Phasellus ac interdum lorem, in elementum mi. Suspendisse auctor ex eget efficitur porta. Nam mollis lectus a ipsum gravida, eget hendrerit metus blandit. Suspendisse potenti. Quisque aliquet augue ut facilisis porttitor. Ut dui felis, interdum vitae lectus sit amet, consequat accumsan felis. Etiam malesuada ipsum vitae lacinia condimentum. Aliquam ac turpis eu risus tincidunt molestie. Sed ac leo libero. Quisque rutrum lacus sit amet augue eleifend sollicitudin. Nulla facilisi. Praesent egestas tortor et nibh rutrum accumsan. Suspendisse potenti. Proin vehicula massa id pretium aliquet. Nunc sed euismod justo, a ullamcorper odio. In ullamcorper diam ut leo pellentesque, at sollicitudin dolor suscipit. Interdum et malesuada fames ac ante ipsum primis in faucibus. Proin felis leo, mollis ut eros ut, dapibus imperdiet diam. Donec iaculis placerat ante, ac commodo nibh luctus id. Suspendisse iaculis feugiat massa quis vehicula. Mauris consequat finibus posuere. Aenean non turpis et quam luctus mattis a id enim. Ut ullamcorper, felis et ultricies lobortis, velit tellus mattis justo, a malesuada odio turpis at nisl. In sed augue maximus, bibendum tellus nec, maximus sapien. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut sem lorem, rhoncus a congue a, tempor nec metus. Suspendisse potenti. Curabitur ultrices pretium odio, et sollicitudin mauris vehicula in. Aenean sed semper neque, vitae lobortis lectus. In id interdum velit. Duis tempus purus diam, vitae tincidunt lacus commodo egestas. Morbi vestibulum, magna eget sollicitudin efficitur, ex libero consectetur odio, sollicitudin tincidunt mauris ante ac velit. Mauris a augue lacus. In bibendum, dui a pellentesque sagittis, tortor risus dignissim enim, eu tristique velit odio sit amet ex. Cras eros leo, convallis sit amet posuere vel, lacinia at enim. Maecenas nec feugiat ipsum. Nunc pellentesque tortor vitae mauris dictum imperdiet. Phasellus porttitor lectus vel neque sollicitudin, nec commodo leo faucibus. Aliquam dignissim ut est in vulputate. Donec ultrices, ex ac molestie porta, ligula sem efficitur velit, at pretium nisl tellus vel nisi. Sed volutpat nisi sed risus vulputate efficitur. Praesent venenatis nisl quis diam condimentum aliquet. Vestibulum et turpis tincidunt, pharetra urna id, egestas diam. Aliquam vitae gravida enim, eu scelerisque dolor. Nunc placerat vitae nisi eget commodo. In tincidunt viverra pellentesque. Duis a lacinia felis. Sed pharetra nibh eget diam finibus, a euismod ipsum placerat."; + + return { + more: function() { + var start = Math.trunc( Math.random() * 1E9 ) % + (words.length - 200); + var text = words.substr(start).match( + /(?:^|(?:\.\s+))((?:[A-Z][^\.]+\.(?:\s+|$)){3})/ + ); + return text ? text[0].replace(/^\.\s+/,"") : next(); + } + }; + +})(); diff --git a/callback/eventemitter2.js b/callback/eventemitter2.js new file mode 100644 index 0000000..bde69e8 --- /dev/null +++ b/callback/eventemitter2.js @@ -0,0 +1,573 @@ +/*! + * EventEmitter2 + * https://github.com/hij1nx/EventEmitter2 + * + * Copyright (c) 2013 hij1nx + * Licensed under the MIT license. + */ +;!function(undefined) { + + var isArray = Array.isArray ? Array.isArray : function _isArray(obj) { + return Object.prototype.toString.call(obj) === "[object Array]"; + }; + var defaultMaxListeners = 10; + + function init() { + this._events = {}; + if (this._conf) { + configure.call(this, this._conf); + } + } + + function configure(conf) { + if (conf) { + + this._conf = conf; + + conf.delimiter && (this.delimiter = conf.delimiter); + conf.maxListeners && (this._events.maxListeners = conf.maxListeners); + conf.wildcard && (this.wildcard = conf.wildcard); + conf.newListener && (this.newListener = conf.newListener); + + if (this.wildcard) { + this.listenerTree = {}; + } + } + } + + function EventEmitter(conf) { + this._events = {}; + this.newListener = false; + configure.call(this, conf); + } + + // + // Attention, function return type now is array, always ! + // It has zero elements if no any matches found and one or more + // elements (leafs) if there are matches + // + function searchListenerTree(handlers, type, tree, i) { + if (!tree) { + return []; + } + var listeners=[], leaf, len, branch, xTree, xxTree, isolatedBranch, endReached, + typeLength = type.length, currentType = type[i], nextType = type[i+1]; + if (i === typeLength && tree._listeners) { + // + // If at the end of the event(s) list and the tree has listeners + // invoke those listeners. + // + if (typeof tree._listeners === 'function') { + handlers && handlers.push(tree._listeners); + return [tree]; + } else { + for (leaf = 0, len = tree._listeners.length; leaf < len; leaf++) { + handlers && handlers.push(tree._listeners[leaf]); + } + return [tree]; + } + } + + if ((currentType === '*' || currentType === '**') || tree[currentType]) { + // + // If the event emitted is '*' at this part + // or there is a concrete match at this patch + // + if (currentType === '*') { + for (branch in tree) { + if (branch !== '_listeners' && tree.hasOwnProperty(branch)) { + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i+1)); + } + } + return listeners; + } else if(currentType === '**') { + endReached = (i+1 === typeLength || (i+2 === typeLength && nextType === '*')); + if(endReached && tree._listeners) { + // The next element has a _listeners, add it to the handlers. + listeners = listeners.concat(searchListenerTree(handlers, type, tree, typeLength)); + } + + for (branch in tree) { + if (branch !== '_listeners' && tree.hasOwnProperty(branch)) { + if(branch === '*' || branch === '**') { + if(tree[branch]._listeners && !endReached) { + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], typeLength)); + } + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i)); + } else if(branch === nextType) { + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i+2)); + } else { + // No match on this one, shift into the tree but not in the type array. + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i)); + } + } + } + return listeners; + } + + listeners = listeners.concat(searchListenerTree(handlers, type, tree[currentType], i+1)); + } + + xTree = tree['*']; + if (xTree) { + // + // If the listener tree will allow any match for this part, + // then recursively explore all branches of the tree + // + searchListenerTree(handlers, type, xTree, i+1); + } + + xxTree = tree['**']; + if(xxTree) { + if(i < typeLength) { + if(xxTree._listeners) { + // If we have a listener on a '**', it will catch all, so add its handler. + searchListenerTree(handlers, type, xxTree, typeLength); + } + + // Build arrays of matching next branches and others. + for(branch in xxTree) { + if(branch !== '_listeners' && xxTree.hasOwnProperty(branch)) { + if(branch === nextType) { + // We know the next element will match, so jump twice. + searchListenerTree(handlers, type, xxTree[branch], i+2); + } else if(branch === currentType) { + // Current node matches, move into the tree. + searchListenerTree(handlers, type, xxTree[branch], i+1); + } else { + isolatedBranch = {}; + isolatedBranch[branch] = xxTree[branch]; + searchListenerTree(handlers, type, { '**': isolatedBranch }, i+1); + } + } + } + } else if(xxTree._listeners) { + // We have reached the end and still on a '**' + searchListenerTree(handlers, type, xxTree, typeLength); + } else if(xxTree['*'] && xxTree['*']._listeners) { + searchListenerTree(handlers, type, xxTree['*'], typeLength); + } + } + + return listeners; + } + + function growListenerTree(type, listener) { + + type = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + + // + // Looks for two consecutive '**', if so, don't add the event at all. + // + for(var i = 0, len = type.length; i+1 < len; i++) { + if(type[i] === '**' && type[i+1] === '**') { + return; + } + } + + var tree = this.listenerTree; + var name = type.shift(); + + while (name) { + + if (!tree[name]) { + tree[name] = {}; + } + + tree = tree[name]; + + if (type.length === 0) { + + if (!tree._listeners) { + tree._listeners = listener; + } + else if(typeof tree._listeners === 'function') { + tree._listeners = [tree._listeners, listener]; + } + else if (isArray(tree._listeners)) { + + tree._listeners.push(listener); + + if (!tree._listeners.warned) { + + var m = defaultMaxListeners; + + if (typeof this._events.maxListeners !== 'undefined') { + m = this._events.maxListeners; + } + + if (m > 0 && tree._listeners.length > m) { + + tree._listeners.warned = true; + console.error('(node) warning: possible EventEmitter memory ' + + 'leak detected. %d listeners added. ' + + 'Use emitter.setMaxListeners() to increase limit.', + tree._listeners.length); + console.trace(); + } + } + } + return true; + } + name = type.shift(); + } + return true; + } + + // By default EventEmitters will print a warning if more than + // 10 listeners are added to it. This is a useful default which + // helps finding memory leaks. + // + // Obviously not all Emitters should be limited to 10. This function allows + // that to be increased. Set to zero for unlimited. + + EventEmitter.prototype.delimiter = '.'; + + EventEmitter.prototype.setMaxListeners = function(n) { + this._events || init.call(this); + this._events.maxListeners = n; + if (!this._conf) this._conf = {}; + this._conf.maxListeners = n; + }; + + EventEmitter.prototype.event = ''; + + EventEmitter.prototype.once = function(event, fn) { + this.many(event, 1, fn); + return this; + }; + + EventEmitter.prototype.many = function(event, ttl, fn) { + var self = this; + + if (typeof fn !== 'function') { + throw new Error('many only accepts instances of Function'); + } + + function listener() { + if (--ttl === 0) { + self.off(event, listener); + } + fn.apply(this, arguments); + } + + listener._origin = fn; + + this.on(event, listener); + + return self; + }; + + EventEmitter.prototype.emit = function() { + + this._events || init.call(this); + + var type = arguments[0]; + + if (type === 'newListener' && !this.newListener) { + if (!this._events.newListener) { return false; } + } + + // Loop through the *_all* functions and invoke them. + if (this._all) { + var l = arguments.length; + var args = new Array(l - 1); + for (var i = 1; i < l; i++) args[i - 1] = arguments[i]; + for (i = 0, l = this._all.length; i < l; i++) { + this.event = type; + this._all[i].apply(this, args); + } + } + + // If there is no 'error' event listener then throw. + if (type === 'error') { + + if (!this._all && + !this._events.error && + !(this.wildcard && this.listenerTree.error)) { + + if (arguments[1] instanceof Error) { + throw arguments[1]; // Unhandled 'error' event + } else { + throw new Error("Uncaught, unspecified 'error' event."); + } + return false; + } + } + + var handler; + + if(this.wildcard) { + handler = []; + var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + searchListenerTree.call(this, handler, ns, this.listenerTree, 0); + } + else { + handler = this._events[type]; + } + + if (typeof handler === 'function') { + this.event = type; + if (arguments.length === 1) { + handler.call(this); + } + else if (arguments.length > 1) + switch (arguments.length) { + case 2: + handler.call(this, arguments[1]); + break; + case 3: + handler.call(this, arguments[1], arguments[2]); + break; + // slower + default: + var l = arguments.length; + var args = new Array(l - 1); + for (var i = 1; i < l; i++) args[i - 1] = arguments[i]; + handler.apply(this, args); + } + return true; + } + else if (handler) { + var l = arguments.length; + var args = new Array(l - 1); + for (var i = 1; i < l; i++) args[i - 1] = arguments[i]; + + var listeners = handler.slice(); + for (var i = 0, l = listeners.length; i < l; i++) { + this.event = type; + listeners[i].apply(this, args); + } + return (listeners.length > 0) || !!this._all; + } + else { + return !!this._all; + } + + }; + + EventEmitter.prototype.on = function(type, listener) { + + if (typeof type === 'function') { + this.onAny(type); + return this; + } + + if (typeof listener !== 'function') { + throw new Error('on only accepts instances of Function'); + } + this._events || init.call(this); + + // To avoid recursion in the case that type == "newListeners"! Before + // adding it to the listeners, first emit "newListeners". + this.emit('newListener', type, listener); + + if(this.wildcard) { + growListenerTree.call(this, type, listener); + return this; + } + + if (!this._events[type]) { + // Optimize the case of one listener. Don't need the extra array object. + this._events[type] = listener; + } + else if(typeof this._events[type] === 'function') { + // Adding the second element, need to change to array. + this._events[type] = [this._events[type], listener]; + } + else if (isArray(this._events[type])) { + // If we've already got an array, just append. + this._events[type].push(listener); + + // Check for listener leak + if (!this._events[type].warned) { + + var m = defaultMaxListeners; + + if (typeof this._events.maxListeners !== 'undefined') { + m = this._events.maxListeners; + } + + if (m > 0 && this._events[type].length > m) { + + this._events[type].warned = true; + console.error('(node) warning: possible EventEmitter memory ' + + 'leak detected. %d listeners added. ' + + 'Use emitter.setMaxListeners() to increase limit.', + this._events[type].length); + console.trace(); + } + } + } + return this; + }; + + EventEmitter.prototype.onAny = function(fn) { + + if (typeof fn !== 'function') { + throw new Error('onAny only accepts instances of Function'); + } + + if(!this._all) { + this._all = []; + } + + // Add the function to the event listener collection. + this._all.push(fn); + return this; + }; + + EventEmitter.prototype.addListener = EventEmitter.prototype.on; + + EventEmitter.prototype.off = function(type, listener) { + if (typeof listener !== 'function') { + throw new Error('removeListener only takes instances of Function'); + } + + var handlers,leafs=[]; + + if(this.wildcard) { + var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + leafs = searchListenerTree.call(this, null, ns, this.listenerTree, 0); + } + else { + // does not use listeners(), so no side effect of creating _events[type] + if (!this._events[type]) return this; + handlers = this._events[type]; + leafs.push({_listeners:handlers}); + } + + for (var iLeaf=0; iLeaf 0) { + fns = this._all; + for(i = 0, l = fns.length; i < l; i++) { + if(fn === fns[i]) { + fns.splice(i, 1); + return this; + } + } + } else { + this._all = []; + } + return this; + }; + + EventEmitter.prototype.removeListener = EventEmitter.prototype.off; + + EventEmitter.prototype.removeAllListeners = function(type) { + if (arguments.length === 0) { + !this._events || init.call(this); + return this; + } + + if(this.wildcard) { + var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + var leafs = searchListenerTree.call(this, null, ns, this.listenerTree, 0); + + for (var iLeaf=0; iLeaf + + + +A Tale Of Three Lists (Callbacks) + + + +

A Tale Of Three Lists (Callbacks)

+ +
+
+ +
+
+
+
+
+
+ +
+ + + + + + + + diff --git a/callback/jquery.js b/callback/jquery.js new file mode 100644 index 0000000..45477c0 --- /dev/null +++ b/callback/jquery.js @@ -0,0 +1,2 @@ +/*! jQuery v1.8.3 jquery.com | jquery.org/license */ +(function(e,t){function _(e){var t=M[e]={};return v.each(e.split(y),function(e,n){t[n]=!0}),t}function H(e,n,r){if(r===t&&e.nodeType===1){var i="data-"+n.replace(P,"-$1").toLowerCase();r=e.getAttribute(i);if(typeof r=="string"){try{r=r==="true"?!0:r==="false"?!1:r==="null"?null:+r+""===r?+r:D.test(r)?v.parseJSON(r):r}catch(s){}v.data(e,n,r)}else r=t}return r}function B(e){var t;for(t in e){if(t==="data"&&v.isEmptyObject(e[t]))continue;if(t!=="toJSON")return!1}return!0}function et(){return!1}function tt(){return!0}function ut(e){return!e||!e.parentNode||e.parentNode.nodeType===11}function at(e,t){do e=e[t];while(e&&e.nodeType!==1);return e}function ft(e,t,n){t=t||0;if(v.isFunction(t))return v.grep(e,function(e,r){var i=!!t.call(e,r,e);return i===n});if(t.nodeType)return v.grep(e,function(e,r){return e===t===n});if(typeof t=="string"){var r=v.grep(e,function(e){return e.nodeType===1});if(it.test(t))return v.filter(t,r,!n);t=v.filter(t,r)}return v.grep(e,function(e,r){return v.inArray(e,t)>=0===n})}function lt(e){var t=ct.split("|"),n=e.createDocumentFragment();if(n.createElement)while(t.length)n.createElement(t.pop());return n}function Lt(e,t){return e.getElementsByTagName(t)[0]||e.appendChild(e.ownerDocument.createElement(t))}function At(e,t){if(t.nodeType!==1||!v.hasData(e))return;var n,r,i,s=v._data(e),o=v._data(t,s),u=s.events;if(u){delete o.handle,o.events={};for(n in u)for(r=0,i=u[n].length;r").appendTo(i.body),n=t.css("display");t.remove();if(n==="none"||n===""){Pt=i.body.appendChild(Pt||v.extend(i.createElement("iframe"),{frameBorder:0,width:0,height:0}));if(!Ht||!Pt.createElement)Ht=(Pt.contentWindow||Pt.contentDocument).document,Ht.write(""),Ht.close();t=Ht.body.appendChild(Ht.createElement(e)),n=Dt(t,"display"),i.body.removeChild(Pt)}return Wt[e]=n,n}function fn(e,t,n,r){var i;if(v.isArray(t))v.each(t,function(t,i){n||sn.test(e)?r(e,i):fn(e+"["+(typeof i=="object"?t:"")+"]",i,n,r)});else if(!n&&v.type(t)==="object")for(i in t)fn(e+"["+i+"]",t[i],n,r);else r(e,t)}function Cn(e){return function(t,n){typeof t!="string"&&(n=t,t="*");var r,i,s,o=t.toLowerCase().split(y),u=0,a=o.length;if(v.isFunction(n))for(;u)[^>]*$|#([\w\-]*)$)/,E=/^<(\w+)\s*\/?>(?:<\/\1>|)$/,S=/^[\],:{}\s]*$/,x=/(?:^|:|,)(?:\s*\[)+/g,T=/\\(?:["\\\/bfnrt]|u[\da-fA-F]{4})/g,N=/"[^"\\\r\n]*"|true|false|null|-?(?:\d\d*\.|)\d+(?:[eE][\-+]?\d+|)/g,C=/^-ms-/,k=/-([\da-z])/gi,L=function(e,t){return(t+"").toUpperCase()},A=function(){i.addEventListener?(i.removeEventListener("DOMContentLoaded",A,!1),v.ready()):i.readyState==="complete"&&(i.detachEvent("onreadystatechange",A),v.ready())},O={};v.fn=v.prototype={constructor:v,init:function(e,n,r){var s,o,u,a;if(!e)return this;if(e.nodeType)return this.context=this[0]=e,this.length=1,this;if(typeof e=="string"){e.charAt(0)==="<"&&e.charAt(e.length-1)===">"&&e.length>=3?s=[null,e,null]:s=w.exec(e);if(s&&(s[1]||!n)){if(s[1])return n=n instanceof v?n[0]:n,a=n&&n.nodeType?n.ownerDocument||n:i,e=v.parseHTML(s[1],a,!0),E.test(s[1])&&v.isPlainObject(n)&&this.attr.call(e,n,!0),v.merge(this,e);o=i.getElementById(s[2]);if(o&&o.parentNode){if(o.id!==s[2])return r.find(e);this.length=1,this[0]=o}return this.context=i,this.selector=e,this}return!n||n.jquery?(n||r).find(e):this.constructor(n).find(e)}return v.isFunction(e)?r.ready(e):(e.selector!==t&&(this.selector=e.selector,this.context=e.context),v.makeArray(e,this))},selector:"",jquery:"1.8.3",length:0,size:function(){return this.length},toArray:function(){return l.call(this)},get:function(e){return e==null?this.toArray():e<0?this[this.length+e]:this[e]},pushStack:function(e,t,n){var r=v.merge(this.constructor(),e);return r.prevObject=this,r.context=this.context,t==="find"?r.selector=this.selector+(this.selector?" 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15px; + margin: 0px 30px; + display: inline-block; + position: relative; + width: 400px; + height: 500px; + border: 3px solid #000; + background-color: #f0f0f0; + vertical-align: top; +} + +#feed-1 > .content, +#feed-2 > .content, +#my-feed > .content { + position: relative; + width: 100%; + height: 100%; + overflow-y: scroll; +} + +.item { + display: block; + position: relative; + margin: 10px 0px; + padding: 5px; + width: 100%; + color: #000; + overflow: hidden; + white-space: nowrap; + text-decoration: none; + text-overflow: ellipsis; +} + +.item.floating { + cursor: default; + position: absolute; + transition: left 0.3s ease-out, top 0.3s ease-out; + max-width: 214px; + max-height: 100px; +} + +.item.killed { + text-decoration: line-through; +} + +#feed-1 > .content > .item, +#feed-2 > .content > .item { + max-height: 100px; +} + +#feed-1 > .content > .item:hover, +#feed-2 > .content > .item:hover { + background-color: rgba(0,0,0,0.1); +} + +#my-feed > .content > .item { + cursor: default; + max-height: inherit; + white-space: normal; + overflow: auto; + text-overflow: inherit; +} + +.first-list { + background-color: #ffb8b3; +} + +.second-list { + background-color: #b3caff; +} diff --git a/callback/ui.js b/callback/ui.js new file mode 100644 index 0000000..3f1708a --- /dev/null +++ b/callback/ui.js @@ -0,0 +1,175 @@ +(function UI(global){ + "use strict"; + + var $body, $feed_1, $feed_2, $my_feed, + $feed_1_content, $feed_2_content, + $my_feed_content; + + // pubsub hub + global.EVT = new EventEmitter2(); + + // run everything! + setup(); + + + // *********************************** + + function setup() { + // wait for DOM-ready + $(document).ready(DOMSetup); + + + // *********************************** + + function DOMSetup() { + $body = $(document.body); + + $feed_1 = $("[rel*=js-feed-1]"); + $feed_1_content = $feed_1.children("[rel*=js-content]"); + $feed_1.children("[rel*=js-toggle]") + .on("click",toggleFeed); + + $feed_2 = $("[rel*=js-feed-2]"); + $feed_2_content = $feed_2.children("[rel*=js-content]"); + $feed_2.children("[rel*=js-toggle]") + .on("click",toggleFeed); + + $my_feed = $("[rel*=js-my-feed]"); + $my_feed_content = $my_feed.children("[rel*=js-content]"); + $my_feed_content.on("click","[rel*=js-item]",noop); + + $feed_1.on("click","[rel*=js-item]",selectItem); + $feed_2.on("click","[rel*=js-item]",selectItem); + + EVT.on("feed-insertion",insertFeedItem); + EVT.on("my-feed-insertion",insertMyFeedItem); + EVT.on("feed-kill",killFeedItem); + + // signal the feeds setup to proceed + EVT.emit("setup-feeds"); + } + } + + function toggleFeed(evt) { + noop(evt); + + var $btn = $(evt.target); + var $feed = $btn.closest("[rel*=js-feed-]"); + var feed_id = Number( $feed.attr("rel").substr(8) ); + var running = ($feed.attr("data-paused") !== "true"); + + // currently running feed? + if (running) { + // pause it + $feed.attr({ "data-paused": "true" }); + $btn.text("resume"); + } + // paused feed + else { + // resume it + $feed.removeAttr("data-paused"); + $btn.text("pause list"); + } + + // signal status message + EVT.emit("status-" + feed_id,!running); + } + + function insertFeedItem(feedID,itemText) { + var $content; + + // which feed to insert into? + if (feedID == 1) $content = $feed_1_content; + else if (feedID == 2) $content = $feed_2_content; + + var $item = $("") + .addClass("item") + .attr({ href: "#", rel: "js-item" }) + .text(itemText); + + $content.prepend($item); + + var $items = $content.children("[rel*=js-item]"); + if ($items.length > 20) { + $items.last().remove(); + } + } + + function selectItem(evt) { + var $item = $(evt.target); + + noop(evt); + + // item not yet killed? + if (!$item.is(".killed")) { + var $feed = $item.closest("[rel*=js-feed-]"); + var feed_id = Number( $feed.attr("rel").substr(8) ); + + // signal item selection + EVT.emit("item-selection",feed_id,$item.text(),$item); + } + } + + function insertMyFeedItem(feed_id,$item) { + var $floating_item = $item.clone().addClass("floating"); + + if (feed_id == 1) $floating_item.addClass("first-list"); + else if (feed_id == 2) $floating_item.addClass("second-list"); + + var item_dims = $item.offset(); + var item_margin_left = parseInt($item.css("margin-left"),10); + var item_margin_top = parseInt($item.css("margin-top"),10); + + $floating_item.css({ + left: (Math.round(item_dims.left) - item_margin_left) + "px", + top: (Math.round(item_dims.top) - item_margin_top) + "px" + }) + .appendTo($body); + + $item.remove(); + + // wait for the next animation frame (CSS junk) + requestAnimationFrame(afterRAF); + + + // *********************************** + + function afterRAF() { + var my_feed_dims = $my_feed_content.offset(); + + $floating_item.css({ + left: Math.round(my_feed_dims.left) + "px", + top: Math.round(my_feed_dims.top) + "px" + }); + + // wait for the transition to end + $floating_item.on("transitionend",afterTransitionEnd); + } + + function afterTransitionEnd(evt) { + noop(evt); + + $floating_item + .unbind("transitionend") + .css({ left: "", top: "" }) + .removeClass("floating") + .prependTo($my_feed_content); + } + } + + function killFeedItem($item) { + $item.addClass("killed"); + + // wait for a second + setTimeout(function afterDelay(){ + $item.remove(); + },1000); + } + + function noop(evt) { + evt.preventDefault(); + evt.stopPropagation(); + evt.stopImmediatePropagation(); + } + +})(window); diff --git a/csp/dummy-data.js b/csp/dummy-data.js new file mode 100644 index 0000000..31c2a85 --- /dev/null +++ b/csp/dummy-data.js @@ -0,0 +1,16 @@ +var ItemsText = (function(){ + + var words = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent vulputate consectetur sem sed efficitur. Nulla ac egestas velit. Cras elementum orci vel sodales dapibus. Etiam tempus ac mi eu elementum. Proin nibh lorem, luctus eget dolor eget, sollicitudin pharetra velit. Quisque scelerisque libero ut elit consectetur, vel placerat diam finibus. Vestibulum vitae velit eget orci mattis bibendum id sed nibh. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam bibendum nibh at nisi ullamcorper euismod. Phasellus sed varius metus. Nullam pretium ex id augue ultricies condimentum. Nunc nisl arcu, placerat quis condimentum in, consequat vel lectus. Pellentesque ullamcorper sed enim quis congue. Pellentesque et elit in dui fermentum tempor. Praesent enim quam, viverra sed ipsum non, iaculis aliquet libero. Maecenas quis egestas sem. Sed sit amet malesuada turpis. Nam tempor velit at nisi lacinia, at vestibulum dolor bibendum. Sed venenatis in eros quis blandit. Maecenas nec aliquet ex, at accumsan quam. 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Maecenas ut felis euismod, vehicula augue ut, aliquet lorem. Suspendisse iaculis, magna nec ullamcorper rhoncus, sapien ex pellentesque odio, ut interdum ante sapien eu erat. Donec quam orci, aliquet eu varius in, tincidunt eu est. Proin vitae est a lectus congue laoreet. Vestibulum id sodales mauris. Vestibulum eu lacus a felis tempus fringilla eu et nunc. Curabitur et imperdiet enim. Vivamus sollicitudin efficitur risus hendrerit euismod. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Nam sed auctor velit, sit amet facilisis nunc. Donec vestibulum convallis neque sed eleifend. Cras dapibus quis sem id sodales. Maecenas metus massa, facilisis quis scelerisque vel, commodo molestie enim. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Maecenas pulvinar ultrices nulla, vel convallis ex laoreet vel. Sed ornare dui eget ante luctus, mollis vehicula neque pulvinar. Nulla posuere, quam quis dapibus rutrum, arcu massa laoreet metus, at condimentum felis justo a est. Nullam pharetra est nunc, a accumsan metus pellentesque ut. Duis auctor justo sit amet tincidunt iaculis. Pellentesque sollicitudin mauris ut ligula suscipit sagittis. Nullam scelerisque tortor sed sem egestas, non auctor nulla fermentum. Aliquam ut nunc condimentum, pellentesque quam feugiat, lacinia elit. Fusce maximus nulla id justo efficitur, congue imperdiet purus feugiat. Pellentesque egestas ultrices tempus. Vestibulum interdum accumsan nulla quis ornare. Duis cursus vel ipsum nec mattis. Donec quam eros, convallis condimentum iaculis a, egestas id tellus. Nullam imperdiet velit sed purus porta, vitae vulputate elit vulputate. Vivamus in maximus libero. Etiam condimentum hendrerit bibendum. Morbi id urna eu erat placerat iaculis. Donec a vehicula purus, a tempus lacus. Mauris quis auctor metus. Maecenas id venenatis libero, nec faucibus est. Sed auctor scelerisque augue, vel efficitur sem sollicitudin quis. Aliquam non justo eu diam convallis posuere. Quisque consequat porta nulla. Nunc lacinia, eros pulvinar dictum mattis, justo lorem finibus nibh, non pellentesque justo metus vitae ligula. Interdum et malesuada fames ac ante ipsum primis in faucibus. Phasellus ac interdum lorem, in elementum mi. Suspendisse auctor ex eget efficitur porta. Nam mollis lectus a ipsum gravida, eget hendrerit metus blandit. Suspendisse potenti. Quisque aliquet augue ut facilisis porttitor. Ut dui felis, interdum vitae lectus sit amet, consequat accumsan felis. Etiam malesuada ipsum vitae lacinia condimentum. Aliquam ac turpis eu risus tincidunt molestie. Sed ac leo libero. Quisque rutrum lacus sit amet augue eleifend sollicitudin. Nulla facilisi. Praesent egestas tortor et nibh rutrum accumsan. Suspendisse potenti. Proin vehicula massa id pretium aliquet. Nunc sed euismod justo, a ullamcorper odio. In ullamcorper diam ut leo pellentesque, at sollicitudin dolor suscipit. Interdum et malesuada fames ac ante ipsum primis in faucibus. Proin felis leo, mollis ut eros ut, dapibus imperdiet diam. Donec iaculis placerat ante, ac commodo nibh luctus id. Suspendisse iaculis feugiat massa quis vehicula. Mauris consequat finibus posuere. Aenean non turpis et quam luctus mattis a id enim. Ut ullamcorper, felis et ultricies lobortis, velit tellus mattis justo, a malesuada odio turpis at nisl. In sed augue maximus, bibendum tellus nec, maximus sapien. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut sem lorem, rhoncus a congue a, tempor nec metus. Suspendisse potenti. Curabitur ultrices pretium odio, et sollicitudin mauris vehicula in. Aenean sed semper neque, vitae lobortis lectus. In id interdum velit. Duis tempus purus diam, vitae tincidunt lacus commodo egestas. Morbi vestibulum, magna eget sollicitudin efficitur, ex libero consectetur odio, sollicitudin tincidunt mauris ante ac velit. Mauris a augue lacus. In bibendum, dui a pellentesque sagittis, tortor risus dignissim enim, eu tristique velit odio sit amet ex. Cras eros leo, convallis sit amet posuere vel, lacinia at enim. Maecenas nec feugiat ipsum. Nunc pellentesque tortor vitae mauris dictum imperdiet. Phasellus porttitor lectus vel neque sollicitudin, nec commodo leo faucibus. Aliquam dignissim ut est in vulputate. Donec ultrices, ex ac molestie porta, ligula sem efficitur velit, at pretium nisl tellus vel nisi. Sed volutpat nisi sed risus vulputate efficitur. Praesent venenatis nisl quis diam condimentum aliquet. Vestibulum et turpis tincidunt, pharetra urna id, egestas diam. Aliquam vitae gravida enim, eu scelerisque dolor. Nunc placerat vitae nisi eget commodo. In tincidunt viverra pellentesque. Duis a lacinia felis. Sed pharetra nibh eget diam finibus, a euismod ipsum placerat."; + + return { + more: function() { + var start = Math.trunc( Math.random() * 1E9 ) % + (words.length - 200); + var text = words.substr(start).match( + /(?:^|(?:\.\s+))((?:[A-Z][^\.]+\.(?:\s+|$)){3})/ + ); + return text ? text[0].replace(/^\.\s+/,"") : next(); + } + }; + +})(); diff --git a/csp/feeds.js b/csp/feeds.js new file mode 100644 index 0000000..3a95bd5 --- /dev/null +++ b/csp/feeds.js @@ -0,0 +1,198 @@ +var Feeds = (function FeedsAPI(){ + "use strict"; + + var Ac = ASQ.csp, // namespace shortcut + + // signal channel(s) + item_feed, + + publicAPI = { + channels: { + feeds_setup: Ac.chan(), + feed_insertions: Ac.chan(), + my_feed_insertions: Ac.chan(), + item_selections: Ac.chan(), + feed_kills: Ac.chan(), + status: [ Ac.chan(), Ac.chan() ] + }, + setupFeeds: setupFeeds + }; + + return publicAPI; + + + // *********************************** + + function *setupFeeds(ch) { + // wait for setup signal + yield Ac.take( + publicAPI.channels.feeds_setup + ); + + // setup fake item feed + item_feed = Ac.chan(); + ch.go(fakeItemFeed); + + // setup slow feed (feed 1) + var slow_feed_toggle = setupFeed(ch.go,/*feedID=*/1,/*delay=*/2000); + + // setup fast feed (feed 2) + var fast_feed_toggle = setupFeed(ch.go,/*feedID=*/2,/*delay=*/1300); + + // monitor feed status + ch.go( + monitorFeedStatus, + [slow_feed_toggle, fast_feed_toggle] + ); + + // setup my feed (duplicate checking) + setupMyFeed(ch.go); + } + + // fake a network stream of data + function *fakeItemFeed() { + while (true) { + // fake a delay + yield Ac.take(Ac.timeout(50)); + + // signal a new item + yield Ac.put( + item_feed, + ItemsText.more() + ); + } + } + + function setupFeed(go,feedID,delay) { + var feed_restart = Ac.chan(), + feed_toggle = Ac.chan(), + running = true; + + // setup feed processes + go(handleFeedToggle); + go(handleFeed); + + return feed_toggle; + + + // *********************************** + + function *handleFeedToggle(){ + var st = running; + + while (true) { + // wait for status signal + st = yield Ac.take( + publicAPI.channels.status[feedID-1] + ); + + // flip of status (aka distinct)? + if (st !== running) { + // feed wasn't previously running? + if (!running) { + // update status + running = st; + + // signal restart of feed + yield Ac.put(feed_restart); + } + else { + // update status + running = st; + } + + // notify of feed toggle + yield Ac.put(feed_toggle,feedID,running); + } + } + } + + function *handleFeed(){ + while (true) { + if (!running) { + // wait for feed restart + yield Ac.take(feed_restart); + } + + // throttle feed sampling + yield Ac.take(Ac.timeout(delay)); + + // feed still running? + if (running) { + // pull new item from feed + var itemText = yield Ac.take(item_feed); + + // signal a feed insertion + yield Ac.put( + publicAPI.channels.feed_insertions, + [feedID,itemText] + ); + } + } + } + } + + function *monitorFeedStatus(ch,toggle_1,toggle_2) { + var running1 = true, running2 = true, feed_id; + + while (true) { + // wait for toggle from either feed + feed_id = yield Ac.alts([toggle_1,toggle_2]); + + // flip feed status + if (feed_id == 1) running1 = !running1; + else if (feed_id == 2) running2 = !running2; + + // both feeds paused? + if (!running1 && !running2) { + // TODO: pause the item feed + } + // keep calm and carry on + else { + // TODO: resume the item feed + } + } + } + + function setupMyFeed(go) { + go(handleItemSelection); + + + // *********************************** + + function *handleItemSelection() { + var tmp, my_feed_text = {}, + feed_id, item_text, $item; + + while (true) { + // wait for item-selection signal + tmp = yield Ac.take( + publicAPI.channels.item_selections + ); + + feed_id = tmp[0]; + item_text = tmp[1]; + $item = tmp[2]; + + // not a duplicate message? + if (!(item_text in my_feed_text)) { + my_feed_text[item_text] = true; + + // signal my-feed insertion + yield Ac.put( + publicAPI.channels.my_feed_insertions, + [feed_id,$item] + ); + } + else { + // signal kill (duplicate) item + yield Ac.put( + publicAPI.channels.feed_kills, + $item + ); + } + } + } + } + +})(); diff --git a/csp/index.html b/csp/index.html new file mode 100644 index 0000000..084cd67 --- /dev/null +++ b/csp/index.html @@ -0,0 +1,30 @@ + + + + +A Tale Of Three Lists (CSP) + + + +

A Tale Of Three Lists (CSP)

+ +
+
+ +
+
+
+
+
+
+ +
+ + + + + + + + + diff --git a/csp/jquery.js b/csp/jquery.js new file mode 100644 index 0000000..45477c0 --- /dev/null +++ b/csp/jquery.js @@ -0,0 +1,2 @@ +/*! jQuery v1.8.3 jquery.com | jquery.org/license */ +(function(e,t){function _(e){var t=M[e]={};return v.each(e.split(y),function(e,n){t[n]=!0}),t}function H(e,n,r){if(r===t&&e.nodeType===1){var i="data-"+n.replace(P,"-$1").toLowerCase();r=e.getAttribute(i);if(typeof r=="string"){try{r=r==="true"?!0:r==="false"?!1:r==="null"?null:+r+""===r?+r:D.test(r)?v.parseJSON(r):r}catch(s){}v.data(e,n,r)}else r=t}return r}function B(e){var t;for(t in e){if(t==="data"&&v.isEmptyObject(e[t]))continue;if(t!=="toJSON")return!1}return!0}function et(){return!1}function tt(){return!0}function ut(e){return!e||!e.parentNode||e.parentNode.nodeType===11}function at(e,t){do e=e[t];while(e&&e.nodeType!==1);return e}function ft(e,t,n){t=t||0;if(v.isFunction(t))return v.grep(e,function(e,r){var i=!!t.call(e,r,e);return i===n});if(t.nodeType)return v.grep(e,function(e,r){return e===t===n});if(typeof t=="string"){var r=v.grep(e,function(e){return e.nodeType===1});if(it.test(t))return v.filter(t,r,!n);t=v.filter(t,r)}return v.grep(e,function(e,r){return v.inArray(e,t)>=0===n})}function lt(e){var t=ct.split("|"),n=e.createDocumentFragment();if(n.createElement)while(t.length)n.createElement(t.pop());return n}function Lt(e,t){return e.getElementsByTagName(t)[0]||e.appendChild(e.ownerDocument.createElement(t))}function At(e,t){if(t.nodeType!==1||!v.hasData(e))return;var n,r,i,s=v._data(e),o=v._data(t,s),u=s.events;if(u){delete o.handle,o.events={};for(n in u)for(r=0,i=u[n].length;r").appendTo(i.body),n=t.css("display");t.remove();if(n==="none"||n===""){Pt=i.body.appendChild(Pt||v.extend(i.createElement("iframe"),{frameBorder:0,width:0,height:0}));if(!Ht||!Pt.createElement)Ht=(Pt.contentWindow||Pt.contentDocument).document,Ht.write(""),Ht.close();t=Ht.body.appendChild(Ht.createElement(e)),n=Dt(t,"display"),i.body.removeChild(Pt)}return Wt[e]=n,n}function fn(e,t,n,r){var i;if(v.isArray(t))v.each(t,function(t,i){n||sn.test(e)?r(e,i):fn(e+"["+(typeof i=="object"?t:"")+"]",i,n,r)});else if(!n&&v.type(t)==="object")for(i in t)fn(e+"["+i+"]",t[i],n,r);else r(e,t)}function Cn(e){return function(t,n){typeof t!="string"&&(n=t,t="*");var r,i,s,o=t.toLowerCase().split(y),u=0,a=o.length;if(v.isFunction(n))for(;u)[^>]*$|#([\w\-]*)$)/,E=/^<(\w+)\s*\/?>(?:<\/\1>|)$/,S=/^[\],:{}\s]*$/,x=/(?:^|:|,)(?:\s*\[)+/g,T=/\\(?:["\\\/bfnrt]|u[\da-fA-F]{4})/g,N=/"[^"\\\r\n]*"|true|false|null|-?(?:\d\d*\.|)\d+(?:[eE][\-+]?\d+|)/g,C=/^-ms-/,k=/-([\da-z])/gi,L=function(e,t){return(t+"").toUpperCase()},A=function(){i.addEventListener?(i.removeEventListener("DOMContentLoaded",A,!1),v.ready()):i.readyState==="complete"&&(i.detachEvent("onreadystatechange",A),v.ready())},O={};v.fn=v.prototype={constructor:v,init:function(e,n,r){var s,o,u,a;if(!e)return this;if(e.nodeType)return this.context=this[0]=e,this.length=1,this;if(typeof e=="string"){e.charAt(0)==="<"&&e.charAt(e.length-1)===">"&&e.length>=3?s=[null,e,null]:s=w.exec(e);if(s&&(s[1]||!n)){if(s[1])return n=n instanceof v?n[0]:n,a=n&&n.nodeType?n.ownerDocument||n:i,e=v.parseHTML(s[1],a,!0),E.test(s[1])&&v.isPlainObject(n)&&this.attr.call(e,n,!0),v.merge(this,e);o=i.getElementById(s[2]);if(o&&o.parentNode){if(o.id!==s[2])return r.find(e);this.length=1,this[0]=o}return this.context=i,this.selector=e,this}return!n||n.jquery?(n||r).find(e):this.constructor(n).find(e)}return v.isFunction(e)?r.ready(e):(e.selector!==t&&(this.selector=e.selector,this.context=e.context),v.makeArray(e,this))},selector:"",jquery:"1.8.3",length:0,size:function(){return this.length},toArray:function(){return l.call(this)},get:function(e){return e==null?this.toArray():e<0?this[this.length+e]:this[e]},pushStack:function(e,t,n){var r=v.merge(this.constructor(),e);return r.prevObject=this,r.context=this.context,t==="find"?r.selector=this.selector+(this.selector?" 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max-height: inherit; + white-space: normal; + overflow: auto; + text-overflow: inherit; +} + +.first-list { + background-color: #ffb8b3; +} + +.second-list { + background-color: #b3caff; +} diff --git a/csp/ui.js b/csp/ui.js new file mode 100644 index 0000000..1547c95 --- /dev/null +++ b/csp/ui.js @@ -0,0 +1,257 @@ +(function App(global){ + "use strict"; + + var Ac = ASQ.csp, // namespace shortcut + + $body, $feed_1, $feed_2, $my_feed, + $feed_1_content, $feed_2_content, + $my_feed_content, + + // signal channel(s) + toggle_clicks, + item_clicks, + raf_chan = Ac.chan(), + docready_chan = Ac.chan(), + + // promise wrapper(s) + rAF, + docready; + + // run everything! + ASQ().runner( + Ac.go(setup), + Ac.go(toggleFeed), + Ac.go(insertFeedItem), + Ac.go(selectItem), + Ac.go(insertMyFeedItem), + Ac.go(killFeedItem), + + Ac.go(Feeds.setupFeeds) + ) + .or(function(err){ + console.log(err); + }); + + + // *********************************** + + function *setup() { + // channel-message wrapper for requestAnimationFrame event + rAF = function rAF(){ + requestAnimationFrame(function af(){ + Ac.putAsync(raf_chan); + }); + return raf_chan; + }; + + // channel-message wrapper for DOM-ready event + docready = function docready(){ + $(document).ready(function ready(){ + Ac.putAsync(docready_chan); + }); + return docready_chan; + }; + + // channels for DOM events + toggle_clicks = Ac.chan(); + item_clicks = Ac.chan(); + + // wait for DOM-ready + yield Ac.take( docready() ); + + $body = $(document.body); + + $feed_1 = $("[rel*=js-feed-1]"); + $feed_1_content = $feed_1.children("[rel*=js-content]"); + $feed_1.children("[rel*=js-toggle]") + .on("click",channelToEventHandler(toggle_clicks)); + + $feed_2 = $("[rel*=js-feed-2]"); + $feed_2_content = $feed_2.children("[rel*=js-content]"); + $feed_2.children("[rel*=js-toggle]") + .on("click",channelToEventHandler(toggle_clicks)); + + $my_feed = $("[rel*=js-my-feed]"); + $my_feed_content = $my_feed.children("[rel*=js-content]"); + $my_feed_content.on("click","[rel*=js-item]",noop); + + $feed_1.on("click","[rel*=js-item]",channelToEventHandler(item_clicks)); + $feed_2.on("click","[rel*=js-item]",channelToEventHandler(item_clicks)); + + // signal the feeds setup to proceed + yield Ac.put(Feeds.channels.feeds_setup); + } + + function *toggleFeed() { + var $btn, $feed, feed_id, running, status; + + while (true) { + // wait for a feed-toggle click + $btn = yield Ac.take(toggle_clicks); + + $feed = $btn.closest("[rel*=js-feed-]"); + feed_id = Number( $feed.attr("rel").substr(8) ); + running = ($feed.attr("data-paused") !== "true"); + + // currently running feed? + if (running) { + // pause it + $feed.attr({ "data-paused": "true" }); + $btn.text("resume"); + } + // paused feed + else { + // resume it + $feed.removeAttr("data-paused"); + $btn.text("pause list"); + } + + // which status channel? + if (feed_id == 1) status = Feeds.channels.status[0]; + else if (feed_id == 2) status = Feeds.channels.status[1]; + + // signal status message + yield Ac.put(status,!running); + } + } + + function *insertFeedItem() { + var tmp, feed_id, itemText, + $content, $item, $items; + + while (true) { + // wait for an item insertion signal + tmp = yield Ac.take(Feeds.channels.feed_insertions); + + feed_id = tmp[0]; + itemText = tmp[1]; + + // which feed to insert into? + if (feed_id == 1) $content = $feed_1_content; + else if (feed_id == 2) $content = $feed_2_content; + + $item = $("") + .addClass("item") + .attr({ href: "#", rel: "js-item" }) + .text(itemText); + + $content.prepend($item); + + $items = $content.children("[rel*=js-item]"); + if ($items.length > 20) { + $items.last().remove(); + } + } + } + + function *selectItem() { + var $item, $feed, feed_id; + + while (true) { + // wait for a click on an item + $item = yield Ac.take(item_clicks); + + // item not yet killed? + if (!$item.is(".killed")) { + $feed = $item.closest("[rel*=js-feed-]"); + feed_id = Number( $feed.attr("rel").substr(8) ); + + // signal item selection + yield Ac.put( + Feeds.channels.item_selections, + [feed_id,$item.text(),$item] + ); + } + } + } + + function *insertMyFeedItem() { + var tmp, feed_id, $item, $floating_item, + item_dims, item_margin_left, + item_margin_top, my_feed_dims; + + while (true) { + // wait for a my-feed item insertion signal + tmp = yield Ac.take(Feeds.channels.my_feed_insertions); + + feed_id = tmp[0]; + $item = tmp[1]; + + $floating_item = $item.clone().addClass("floating"); + + if (feed_id == 1) $floating_item.addClass("first-list"); + else if (feed_id == 2) $floating_item.addClass("second-list"); + + item_dims = $item.offset(); + item_margin_left = parseInt($item.css("margin-left"),10); + item_margin_top = parseInt($item.css("margin-top"),10); + + $floating_item.css({ + left: (Math.round(item_dims.left) - item_margin_left) + "px", + top: (Math.round(item_dims.top) - item_margin_top) + "px" + }) + .appendTo($body); + + $item.remove(); + + // wait for the next animation frame (CSS junk) + yield Ac.take( rAF() ); + + my_feed_dims = $my_feed_content.offset(); + + $floating_item.css({ + left: Math.round(my_feed_dims.left) + "px", + top: Math.round(my_feed_dims.top) + "px" + }); + + // wait for the transition to end + yield Ac.take( + fromEvent($floating_item,"transitionend") + ); + + $floating_item + .unbind("transitionend") + .css({ left: "", top: "" }) + .removeClass("floating") + .prependTo($my_feed_content); + } + } + + function *killFeedItem() { + var $item; + + while (true) { + // wait for an item kill signal (selected dupe) + $item = yield Ac.take(Feeds.channels.feed_kills); + + $item.addClass("killed"); + + // wait for a second + yield Ac.take(Ac.timeout(1000)); + + $item.remove(); + } + } + + // bridge DOM events to channel messages + function fromEvent($el,evtName) { + var ch = Ac.chan(); + $el.on(evtName,channelToEventHandler(ch)); + return ch; + } + + // wrap channel messages as DOM event handler + function channelToEventHandler(ch) { + return function handler(evt) { + noop(evt); + Ac.putAsync(ch,$(evt.target)); + }; + } + + function noop(evt) { + evt.preventDefault(); + evt.stopPropagation(); + evt.stopImmediatePropagation(); + } + +})(window); diff --git a/package.json b/package.json new file mode 100644 index 0000000..0e33d84 --- /dev/null +++ b/package.json @@ -0,0 +1,29 @@ +{ + "name": "a-tale-of-three-lists", + "version": "1.0.0", + "description": "exploring async patterns with a silly async demo", + "dependencies": { + "native-promise-only": "latest", + "asynquence": "latest", + "asynquence-contrib": "latest" + }, + "repository": { + "type": "git", + "url": "git://github.com/getify/a-tale-of-three-lists.git" + }, + "keywords": [ + "async", + "flow-control", + "promise", + "generator", + "reactive", + "observable" + ], + "bugs": { + "url": "https://github.com/getify/a-tale-of-three-lists/issues", + "email": "getify@gmail.com" + }, + "homepage": "http://github.com/getify/a-tale-of-three-lists", + "author": "Kyle Simpson ", + "license": "MIT" +} diff --git a/promise-generator/dummy-data.js b/promise-generator/dummy-data.js new file mode 100644 index 0000000..31c2a85 --- /dev/null +++ b/promise-generator/dummy-data.js @@ -0,0 +1,16 @@ +var ItemsText = (function(){ + + var words = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent vulputate consectetur sem sed efficitur. Nulla ac egestas velit. Cras elementum orci vel sodales dapibus. Etiam tempus ac mi eu elementum. Proin nibh lorem, luctus eget dolor eget, sollicitudin pharetra velit. Quisque scelerisque libero ut elit consectetur, vel placerat diam finibus. Vestibulum vitae velit eget orci mattis bibendum id sed nibh. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam bibendum nibh at nisi ullamcorper euismod. Phasellus sed varius metus. Nullam pretium ex id augue ultricies condimentum. Nunc nisl arcu, placerat quis condimentum in, consequat vel lectus. Pellentesque ullamcorper sed enim quis congue. Pellentesque et elit in dui fermentum tempor. Praesent enim quam, viverra sed ipsum non, iaculis aliquet libero. Maecenas quis egestas sem. Sed sit amet malesuada turpis. Nam tempor velit at nisi lacinia, at vestibulum dolor bibendum. Sed venenatis in eros quis blandit. Maecenas nec aliquet ex, at accumsan quam. Vestibulum semper, libero ac rhoncus facilisis, augue diam interdum ex, in eleifend turpis lorem euismod sem. Vivamus sit amet ipsum et nunc dignissim tincidunt vel eget risus. Sed et nunc tempus, cursus ante eget, egestas quam. Integer turpis nulla, rutrum a nunc non, maximus malesuada massa. Suspendisse vel egestas felis. Donec vehicula neque augue, sit amet mattis nulla pellentesque eu. Vestibulum gravida malesuada rhoncus. Curabitur rhoncus diam nunc, non dignissim risus ultrices at. Cras id ligula mattis, scelerisque diam nec, sagittis nibh. Quisque malesuada ipsum at magna molestie, ac ultricies ante consectetur. Vivamus turpis neque, faucibus et molestie vulputate, dictum at diam. Ut et massa vitae neque ultricies rutrum. Donec aliquet elementum tincidunt. In viverra sem ante, vel imperdiet nisi facilisis non. Nunc interdum, urna at tempor semper, sapien justo feugiat nisl, condimentum finibus metus nibh in diam. Aliquam erat volutpat. Maecenas ut felis euismod, vehicula augue ut, aliquet lorem. Suspendisse iaculis, magna nec ullamcorper rhoncus, sapien ex pellentesque odio, ut interdum ante sapien eu erat. Donec quam orci, aliquet eu varius in, tincidunt eu est. Proin vitae est a lectus congue laoreet. Vestibulum id sodales mauris. Vestibulum eu lacus a felis tempus fringilla eu et nunc. Curabitur et imperdiet enim. Vivamus sollicitudin efficitur risus hendrerit euismod. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Nam sed auctor velit, sit amet facilisis nunc. Donec vestibulum convallis neque sed eleifend. Cras dapibus quis sem id sodales. Maecenas metus massa, facilisis quis scelerisque vel, commodo molestie enim. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Maecenas pulvinar ultrices nulla, vel convallis ex laoreet vel. Sed ornare dui eget ante luctus, mollis vehicula neque pulvinar. Nulla posuere, quam quis dapibus rutrum, arcu massa laoreet metus, at condimentum felis justo a est. Nullam pharetra est nunc, a accumsan metus pellentesque ut. Duis auctor justo sit amet tincidunt iaculis. Pellentesque sollicitudin mauris ut ligula suscipit sagittis. Nullam scelerisque tortor sed sem egestas, non auctor nulla fermentum. Aliquam ut nunc condimentum, pellentesque quam feugiat, lacinia elit. Fusce maximus nulla id justo efficitur, congue imperdiet purus feugiat. Pellentesque egestas ultrices tempus. Vestibulum interdum accumsan nulla quis ornare. Duis cursus vel ipsum nec mattis. Donec quam eros, convallis condimentum iaculis a, egestas id tellus. Nullam imperdiet velit sed purus porta, vitae vulputate elit vulputate. Vivamus in maximus libero. Etiam condimentum hendrerit bibendum. Morbi id urna eu erat placerat iaculis. Donec a vehicula purus, a tempus lacus. Mauris quis auctor metus. Maecenas id venenatis libero, nec faucibus est. Sed auctor scelerisque augue, vel efficitur sem sollicitudin quis. Aliquam non justo eu diam convallis posuere. Quisque consequat porta nulla. Nunc lacinia, eros pulvinar dictum mattis, justo lorem finibus nibh, non pellentesque justo metus vitae ligula. Interdum et malesuada fames ac ante ipsum primis in faucibus. Phasellus ac interdum lorem, in elementum mi. Suspendisse auctor ex eget efficitur porta. Nam mollis lectus a ipsum gravida, eget hendrerit metus blandit. Suspendisse potenti. Quisque aliquet augue ut facilisis porttitor. Ut dui felis, interdum vitae lectus sit amet, consequat accumsan felis. Etiam malesuada ipsum vitae lacinia condimentum. Aliquam ac turpis eu risus tincidunt molestie. Sed ac leo libero. Quisque rutrum lacus sit amet augue eleifend sollicitudin. Nulla facilisi. Praesent egestas tortor et nibh rutrum accumsan. Suspendisse potenti. Proin vehicula massa id pretium aliquet. Nunc sed euismod justo, a ullamcorper odio. In ullamcorper diam ut leo pellentesque, at sollicitudin dolor suscipit. Interdum et malesuada fames ac ante ipsum primis in faucibus. Proin felis leo, mollis ut eros ut, dapibus imperdiet diam. Donec iaculis placerat ante, ac commodo nibh luctus id. Suspendisse iaculis feugiat massa quis vehicula. Mauris consequat finibus posuere. Aenean non turpis et quam luctus mattis a id enim. Ut ullamcorper, felis et ultricies lobortis, velit tellus mattis justo, a malesuada odio turpis at nisl. In sed augue maximus, bibendum tellus nec, maximus sapien. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut sem lorem, rhoncus a congue a, tempor nec metus. Suspendisse potenti. Curabitur ultrices pretium odio, et sollicitudin mauris vehicula in. Aenean sed semper neque, vitae lobortis lectus. In id interdum velit. Duis tempus purus diam, vitae tincidunt lacus commodo egestas. Morbi vestibulum, magna eget sollicitudin efficitur, ex libero consectetur odio, sollicitudin tincidunt mauris ante ac velit. Mauris a augue lacus. In bibendum, dui a pellentesque sagittis, tortor risus dignissim enim, eu tristique velit odio sit amet ex. Cras eros leo, convallis sit amet posuere vel, lacinia at enim. Maecenas nec feugiat ipsum. Nunc pellentesque tortor vitae mauris dictum imperdiet. Phasellus porttitor lectus vel neque sollicitudin, nec commodo leo faucibus. Aliquam dignissim ut est in vulputate. Donec ultrices, ex ac molestie porta, ligula sem efficitur velit, at pretium nisl tellus vel nisi. Sed volutpat nisi sed risus vulputate efficitur. Praesent venenatis nisl quis diam condimentum aliquet. Vestibulum et turpis tincidunt, pharetra urna id, egestas diam. Aliquam vitae gravida enim, eu scelerisque dolor. Nunc placerat vitae nisi eget commodo. In tincidunt viverra pellentesque. Duis a lacinia felis. Sed pharetra nibh eget diam finibus, a euismod ipsum placerat."; + + return { + more: function() { + var start = Math.trunc( Math.random() * 1E9 ) % + (words.length - 200); + var text = words.substr(start).match( + /(?:^|(?:\.\s+))((?:[A-Z][^\.]+\.(?:\s+|$)){3})/ + ); + return text ? text[0].replace(/^\.\s+/,"") : next(); + } + }; + +})(); diff --git a/promise-generator/eventemitter2.js b/promise-generator/eventemitter2.js new file mode 100644 index 0000000..bde69e8 --- /dev/null +++ b/promise-generator/eventemitter2.js @@ -0,0 +1,573 @@ +/*! + * EventEmitter2 + * https://github.com/hij1nx/EventEmitter2 + * + * Copyright (c) 2013 hij1nx + * Licensed under the MIT license. + */ +;!function(undefined) { + + var isArray = Array.isArray ? Array.isArray : function _isArray(obj) { + return Object.prototype.toString.call(obj) === "[object Array]"; + }; + var defaultMaxListeners = 10; + + function init() { + this._events = {}; + if (this._conf) { + configure.call(this, this._conf); + } + } + + function configure(conf) { + if (conf) { + + this._conf = conf; + + conf.delimiter && (this.delimiter = conf.delimiter); + conf.maxListeners && (this._events.maxListeners = conf.maxListeners); + conf.wildcard && (this.wildcard = conf.wildcard); + conf.newListener && (this.newListener = conf.newListener); + + if (this.wildcard) { + this.listenerTree = {}; + } + } + } + + function EventEmitter(conf) { + this._events = {}; + this.newListener = false; + configure.call(this, conf); + } + + // + // Attention, function return type now is array, always ! + // It has zero elements if no any matches found and one or more + // elements (leafs) if there are matches + // + function searchListenerTree(handlers, type, tree, i) { + if (!tree) { + return []; + } + var listeners=[], leaf, len, branch, xTree, xxTree, isolatedBranch, endReached, + typeLength = type.length, currentType = type[i], nextType = type[i+1]; + if (i === typeLength && tree._listeners) { + // + // If at the end of the event(s) list and the tree has listeners + // invoke those listeners. + // + if (typeof tree._listeners === 'function') { + handlers && handlers.push(tree._listeners); + return [tree]; + } else { + for (leaf = 0, len = tree._listeners.length; leaf < len; leaf++) { + handlers && handlers.push(tree._listeners[leaf]); + } + return [tree]; + } + } + + if ((currentType === '*' || currentType === '**') || tree[currentType]) { + // + // If the event emitted is '*' at this part + // or there is a concrete match at this patch + // + if (currentType === '*') { + for (branch in tree) { + if (branch !== '_listeners' && tree.hasOwnProperty(branch)) { + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i+1)); + } + } + return listeners; + } else if(currentType === '**') { + endReached = (i+1 === typeLength || (i+2 === typeLength && nextType === '*')); + if(endReached && tree._listeners) { + // The next element has a _listeners, add it to the handlers. + listeners = listeners.concat(searchListenerTree(handlers, type, tree, typeLength)); + } + + for (branch in tree) { + if (branch !== '_listeners' && tree.hasOwnProperty(branch)) { + if(branch === '*' || branch === '**') { + if(tree[branch]._listeners && !endReached) { + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], typeLength)); + } + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i)); + } else if(branch === nextType) { + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i+2)); + } else { + // No match on this one, shift into the tree but not in the type array. + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i)); + } + } + } + return listeners; + } + + listeners = listeners.concat(searchListenerTree(handlers, type, tree[currentType], i+1)); + } + + xTree = tree['*']; + if (xTree) { + // + // If the listener tree will allow any match for this part, + // then recursively explore all branches of the tree + // + searchListenerTree(handlers, type, xTree, i+1); + } + + xxTree = tree['**']; + if(xxTree) { + if(i < typeLength) { + if(xxTree._listeners) { + // If we have a listener on a '**', it will catch all, so add its handler. + searchListenerTree(handlers, type, xxTree, typeLength); + } + + // Build arrays of matching next branches and others. + for(branch in xxTree) { + if(branch !== '_listeners' && xxTree.hasOwnProperty(branch)) { + if(branch === nextType) { + // We know the next element will match, so jump twice. + searchListenerTree(handlers, type, xxTree[branch], i+2); + } else if(branch === currentType) { + // Current node matches, move into the tree. + searchListenerTree(handlers, type, xxTree[branch], i+1); + } else { + isolatedBranch = {}; + isolatedBranch[branch] = xxTree[branch]; + searchListenerTree(handlers, type, { '**': isolatedBranch }, i+1); + } + } + } + } else if(xxTree._listeners) { + // We have reached the end and still on a '**' + searchListenerTree(handlers, type, xxTree, typeLength); + } else if(xxTree['*'] && xxTree['*']._listeners) { + searchListenerTree(handlers, type, xxTree['*'], typeLength); + } + } + + return listeners; + } + + function growListenerTree(type, listener) { + + type = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + + // + // Looks for two consecutive '**', if so, don't add the event at all. + // + for(var i = 0, len = type.length; i+1 < len; i++) { + if(type[i] === '**' && type[i+1] === '**') { + return; + } + } + + var tree = this.listenerTree; + var name = type.shift(); + + while (name) { + + if (!tree[name]) { + tree[name] = {}; + } + + tree = tree[name]; + + if (type.length === 0) { + + if (!tree._listeners) { + tree._listeners = listener; + } + else if(typeof tree._listeners === 'function') { + tree._listeners = [tree._listeners, listener]; + } + else if (isArray(tree._listeners)) { + + tree._listeners.push(listener); + + if (!tree._listeners.warned) { + + var m = defaultMaxListeners; + + if (typeof this._events.maxListeners !== 'undefined') { + m = this._events.maxListeners; + } + + if (m > 0 && tree._listeners.length > m) { + + tree._listeners.warned = true; + console.error('(node) warning: possible EventEmitter memory ' + + 'leak detected. %d listeners added. ' + + 'Use emitter.setMaxListeners() to increase limit.', + tree._listeners.length); + console.trace(); + } + } + } + return true; + } + name = type.shift(); + } + return true; + } + + // By default EventEmitters will print a warning if more than + // 10 listeners are added to it. This is a useful default which + // helps finding memory leaks. + // + // Obviously not all Emitters should be limited to 10. This function allows + // that to be increased. Set to zero for unlimited. + + EventEmitter.prototype.delimiter = '.'; + + EventEmitter.prototype.setMaxListeners = function(n) { + this._events || init.call(this); + this._events.maxListeners = n; + if (!this._conf) this._conf = {}; + this._conf.maxListeners = n; + }; + + EventEmitter.prototype.event = ''; + + EventEmitter.prototype.once = function(event, fn) { + this.many(event, 1, fn); + return this; + }; + + EventEmitter.prototype.many = function(event, ttl, fn) { + var self = this; + + if (typeof fn !== 'function') { + throw new Error('many only accepts instances of Function'); + } + + function listener() { + if (--ttl === 0) { + self.off(event, listener); + } + fn.apply(this, arguments); + } + + listener._origin = fn; + + this.on(event, listener); + + return self; + }; + + EventEmitter.prototype.emit = function() { + + this._events || init.call(this); + + var type = arguments[0]; + + if (type === 'newListener' && !this.newListener) { + if (!this._events.newListener) { return false; } + } + + // Loop through the *_all* functions and invoke them. + if (this._all) { + var l = arguments.length; + var args = new Array(l - 1); + for (var i = 1; i < l; i++) args[i - 1] = arguments[i]; + for (i = 0, l = this._all.length; i < l; i++) { + this.event = type; + this._all[i].apply(this, args); + } + } + + // If there is no 'error' event listener then throw. + if (type === 'error') { + + if (!this._all && + !this._events.error && + !(this.wildcard && this.listenerTree.error)) { + + if (arguments[1] instanceof Error) { + throw arguments[1]; // Unhandled 'error' event + } else { + throw new Error("Uncaught, unspecified 'error' event."); + } + return false; + } + } + + var handler; + + if(this.wildcard) { + handler = []; + var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + searchListenerTree.call(this, handler, ns, this.listenerTree, 0); + } + else { + handler = this._events[type]; + } + + if (typeof handler === 'function') { + this.event = type; + if (arguments.length === 1) { + handler.call(this); + } + else if (arguments.length > 1) + switch (arguments.length) { + case 2: + handler.call(this, arguments[1]); + break; + case 3: + handler.call(this, arguments[1], arguments[2]); + break; + // slower + default: + var l = arguments.length; + var args = new Array(l - 1); + for (var i = 1; i < l; i++) args[i - 1] = arguments[i]; + handler.apply(this, args); + } + return true; + } + else if (handler) { + var l = arguments.length; + var args = new Array(l - 1); + for (var i = 1; i < l; i++) args[i - 1] = arguments[i]; + + var listeners = handler.slice(); + for (var i = 0, l = listeners.length; i < l; i++) { + this.event = type; + listeners[i].apply(this, args); + } + return (listeners.length > 0) || !!this._all; + } + else { + return !!this._all; + } + + }; + + EventEmitter.prototype.on = function(type, listener) { + + if (typeof type === 'function') { + this.onAny(type); + return this; + } + + if (typeof listener !== 'function') { + throw new Error('on only accepts instances of Function'); + } + this._events || init.call(this); + + // To avoid recursion in the case that type == "newListeners"! Before + // adding it to the listeners, first emit "newListeners". + this.emit('newListener', type, listener); + + if(this.wildcard) { + growListenerTree.call(this, type, listener); + return this; + } + + if (!this._events[type]) { + // Optimize the case of one listener. Don't need the extra array object. + this._events[type] = listener; + } + else if(typeof this._events[type] === 'function') { + // Adding the second element, need to change to array. + this._events[type] = [this._events[type], listener]; + } + else if (isArray(this._events[type])) { + // If we've already got an array, just append. + this._events[type].push(listener); + + // Check for listener leak + if (!this._events[type].warned) { + + var m = defaultMaxListeners; + + if (typeof this._events.maxListeners !== 'undefined') { + m = this._events.maxListeners; + } + + if (m > 0 && this._events[type].length > m) { + + this._events[type].warned = true; + console.error('(node) warning: possible EventEmitter memory ' + + 'leak detected. %d listeners added. ' + + 'Use emitter.setMaxListeners() to increase limit.', + this._events[type].length); + console.trace(); + } + } + } + return this; + }; + + EventEmitter.prototype.onAny = function(fn) { + + if (typeof fn !== 'function') { + throw new Error('onAny only accepts instances of Function'); + } + + if(!this._all) { + this._all = []; + } + + // Add the function to the event listener collection. + this._all.push(fn); + return this; + }; + + EventEmitter.prototype.addListener = EventEmitter.prototype.on; + + EventEmitter.prototype.off = function(type, listener) { + if (typeof listener !== 'function') { + throw new Error('removeListener only takes instances of Function'); + } + + var handlers,leafs=[]; + + if(this.wildcard) { + var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + leafs = searchListenerTree.call(this, null, ns, this.listenerTree, 0); + } + else { + // does not use listeners(), so no side effect of creating _events[type] + if (!this._events[type]) return this; + handlers = this._events[type]; + leafs.push({_listeners:handlers}); + } + + for (var iLeaf=0; iLeaf 0) { + fns = this._all; + for(i = 0, l = fns.length; i < l; i++) { + if(fn === fns[i]) { + fns.splice(i, 1); + return this; + } + } + } else { + this._all = []; + } + return this; + }; + + EventEmitter.prototype.removeListener = EventEmitter.prototype.off; + + EventEmitter.prototype.removeAllListeners = function(type) { + if (arguments.length === 0) { + !this._events || init.call(this); + return this; + } + + if(this.wildcard) { + var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + var leafs = searchListenerTree.call(this, null, ns, this.listenerTree, 0); + + for (var iLeaf=0; iLeaf + + + +A Tale Of Three Lists (Promises + Generators) + + + +

A Tale Of Three Lists (Promises + Generators)

+ +
+
+ +
+
+
+
+
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+ +
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+#my-feed { + padding: 5px 15px; + margin: 0px 30px; + display: inline-block; + position: relative; + width: 400px; + height: 500px; + border: 3px solid #000; + background-color: #f0f0f0; + vertical-align: top; +} + +#feed-1 > .content, +#feed-2 > .content, +#my-feed > .content { + position: relative; + width: 100%; + height: 100%; + overflow-y: scroll; +} + +.item { + display: block; + position: relative; + margin: 10px 0px; + padding: 5px; + width: 100%; + color: #000; + overflow: hidden; + white-space: nowrap; + text-decoration: none; + text-overflow: ellipsis; +} + +.item.floating { + cursor: default; + position: absolute; + transition: left 0.3s ease-out, top 0.3s ease-out; + max-width: 214px; + max-height: 100px; +} + +.item.killed { + text-decoration: line-through; +} + +#feed-1 > .content > .item, +#feed-2 > .content > .item { + max-height: 100px; +} + +#feed-1 > .content > .item:hover, +#feed-2 > .content > .item:hover { + background-color: rgba(0,0,0,0.1); +} + +#my-feed > .content > .item { + cursor: default; + max-height: inherit; + white-space: normal; + overflow: auto; + text-overflow: inherit; +} + +.first-list { + background-color: #ffb8b3; +} + +.second-list { + background-color: #b3caff; +} diff --git a/promise-generator/ui.js b/promise-generator/ui.js new file mode 100644 index 0000000..25a7da1 --- /dev/null +++ b/promise-generator/ui.js @@ -0,0 +1,255 @@ +(function UI(global){ + "use strict"; + + var $body, $feed_1, $feed_2, $my_feed, + $feed_1_content, $feed_2_content, + $my_feed_content, + + // signal event handler(s) + toggle_clicks, + item_clicks, + + // promise wrapper(s) + rAF, + docready; + + // pubsub hub + global.EVT = new EventEmitter2(); + + // run everything! + ASQ().runner(setup); + + + // *********************************** + + function *setup() { + // promise-wrapper for requestAnimationFrame event + // note: this is a one-time event, so promise OK + rAF = function rAF() { + return new Promise(function executor(resolve){ + requestAnimationFrame(resolve); + }); + }, + + // promise-wrapper for DOM-ready event + // note: this is a one-time event, so promise OK + docready = function docready() { + return new Promise(function executor(resolve){ + $(document).ready(resolve); + }); + }; + + // DOM event handlers from promises + toggle_clicks = promiseBasedEventHandler(function *setupToggleClicks(pr){ + toggleFeed( yield pr ); + }); + item_clicks = promiseBasedEventHandler(function *setupItemClicks(pr){ + selectItem( yield pr ); + }); + + // wait for DOM-ready + yield docready(); + + $body = $(document.body); + + $feed_1 = $("[rel*=js-feed-1]"); + $feed_1_content = $feed_1.children("[rel*=js-content]"); + $feed_1.children("[rel*=js-toggle]") + .on("click",toggle_clicks); + + $feed_2 = $("[rel*=js-feed-2]"); + $feed_2_content = $feed_2.children("[rel*=js-content]"); + $feed_2.children("[rel*=js-toggle]") + .on("click",toggle_clicks); + + $my_feed = $("[rel*=js-my-feed]"); + $my_feed_content = $my_feed.children("[rel*=js-content]"); + $my_feed_content.on("click","[rel*=js-item]",noop); + + $feed_1.on("click","[rel*=js-item]",item_clicks); + $feed_2.on("click","[rel*=js-item]",item_clicks); + + EVT.on("feed-insertion",insertFeedItem); + EVT.on("my-feed-insertion",ASQ.wrap(insertMyFeedItem,{ gen: true, spread: true })); + EVT.on("feed-kill",ASQ.wrap(killFeedItem,{ gen: true, spread: true })); + + // signal the feeds setup to proceed + EVT.emit("setup-feeds"); + } + + function toggleFeed($btn) { + var $feed = $btn.closest("[rel*=js-feed-]"); + var feed_id = Number( $feed.attr("rel").substr(8) ); + var running = ($feed.attr("data-paused") !== "true"); + + // currently running feed? + if (running) { + // pause it + $feed.attr({ "data-paused": "true" }); + $btn.text("resume"); + } + // paused feed + else { + // resume it + $feed.removeAttr("data-paused"); + $btn.text("pause list"); + } + + // signal status message + EVT.emit("status-" + feed_id,!running); + } + + function insertFeedItem(feedID,itemText) { + var $content; + + // which feed to insert into? + if (feedID == 1) $content = $feed_1_content; + else if (feedID == 2) $content = $feed_2_content; + + var $item = $("") + .addClass("item") + .attr({ href: "#", rel: "js-item" }) + .text(itemText); + + $content.prepend($item); + + var $items = $content.children("[rel*=js-item]"); + if ($items.length > 20) { + $items.last().remove(); + } + } + + function selectItem($item) { + // item not yet killed? + if (!$item.is(".killed")) { + var $feed = $item.closest("[rel*=js-feed-]"); + var feed_id = Number( $feed.attr("rel").substr(8) ); + + // signal item selection + EVT.emit("item-selection",feed_id,$item.text(),$item); + } + } + + function *insertMyFeedItem(feed_id,$item) { + var $floating_item = $item.clone().addClass("floating"); + + if (feed_id == 1) $floating_item.addClass("first-list"); + else if (feed_id == 2) $floating_item.addClass("second-list"); + + var item_dims = $item.offset(); + var item_margin_left = parseInt($item.css("margin-left"),10); + var item_margin_top = parseInt($item.css("margin-top"),10); + + $floating_item.css({ + left: (Math.round(item_dims.left) - item_margin_left) + "px", + top: (Math.round(item_dims.top) - item_margin_top) + "px" + }) + .appendTo($body); + + $item.remove(); + + // wait for the next animation frame (CSS junk) + yield rAF(); + + var my_feed_dims = $my_feed_content.offset(); + + $floating_item.css({ + left: Math.round(my_feed_dims.left) + "px", + top: Math.round(my_feed_dims.top) + "px" + }); + + // wait for the transition to end + yield fromEventOnce($floating_item,"transitionend"); + + $floating_item + .unbind("transitionend") + .css({ left: "", top: "" }) + .removeClass("floating") + .prependTo($my_feed_content); + } + + function *killFeedItem($item) { + $item.addClass("killed"); + + // wait for a second + yield (new Promise(function resolver(resolve){ + setTimeout(resolve,1000); + })); + + $item.remove(); + } + + // bridge DOM events to promises + function fromEventOnce($el,evtName,definePromiseChain) { + var tmp = extractPromiseResolvers(), + pr = tmp[0], + resolve = tmp[1]; + + $el.on(evtName,onevt); + + return pr; + + + // *********************************** + + function onevt(evt) { + noop(evt); + + // unbind event handler since promises are + // resolvable only once + $el.off(evtName,onevt); + + resolve($(evt.target)); + } + } + + function extractPromiseResolvers() { + var resolveFn, rejectFn, + p = new Promise(function resolver(resolve,reject){ + resolveFn = resolve; + rejectFn = reject; + }); + return [p,resolveFn,rejectFn]; + } + + function promiseBasedEventHandler(definePromiseChain) { + var pr, resolve, reject; + + definePromiseChain = ASQ.wrap(definePromiseChain,{ gen: true, spread: true }); + + // start out with a promise + getNextPromise(); + + return eventHandler; + + // *********************************** + + function eventHandler(evt) { + noop(evt); + + // resolve previous promise + resolve($(evt.target)); + + // get the next promise ready in case + // this event fires again + getNextPromise(); + } + + function getNextPromise() { + var tmp = extractPromiseResolvers(); + + pr = tmp[0]; + resolve = tmp[1]; + reject = tmp[2]; + + definePromiseChain(pr); + } + } + + function noop(evt) { + evt.preventDefault(); + evt.stopPropagation(); + evt.stopImmediatePropagation(); + } + +})(window); diff --git a/promise/dummy-data.js b/promise/dummy-data.js new file mode 100644 index 0000000..31c2a85 --- /dev/null +++ b/promise/dummy-data.js @@ -0,0 +1,16 @@ +var ItemsText = (function(){ + + var words = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent vulputate consectetur sem sed efficitur. Nulla ac egestas velit. Cras elementum orci vel sodales dapibus. Etiam tempus ac mi eu elementum. Proin nibh lorem, luctus eget dolor eget, sollicitudin pharetra velit. Quisque scelerisque libero ut elit consectetur, vel placerat diam finibus. Vestibulum vitae velit eget orci mattis bibendum id sed nibh. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam bibendum nibh at nisi ullamcorper euismod. Phasellus sed varius metus. Nullam pretium ex id augue ultricies condimentum. Nunc nisl arcu, placerat quis condimentum in, consequat vel lectus. Pellentesque ullamcorper sed enim quis congue. Pellentesque et elit in dui fermentum tempor. Praesent enim quam, viverra sed ipsum non, iaculis aliquet libero. Maecenas quis egestas sem. Sed sit amet malesuada turpis. Nam tempor velit at nisi lacinia, at vestibulum dolor bibendum. Sed venenatis in eros quis blandit. Maecenas nec aliquet ex, at accumsan quam. Vestibulum semper, libero ac rhoncus facilisis, augue diam interdum ex, in eleifend turpis lorem euismod sem. Vivamus sit amet ipsum et nunc dignissim tincidunt vel eget risus. Sed et nunc tempus, cursus ante eget, egestas quam. Integer turpis nulla, rutrum a nunc non, maximus malesuada massa. Suspendisse vel egestas felis. Donec vehicula neque augue, sit amet mattis nulla pellentesque eu. Vestibulum gravida malesuada rhoncus. Curabitur rhoncus diam nunc, non dignissim risus ultrices at. Cras id ligula mattis, scelerisque diam nec, sagittis nibh. Quisque malesuada ipsum at magna molestie, ac ultricies ante consectetur. Vivamus turpis neque, faucibus et molestie vulputate, dictum at diam. Ut et massa vitae neque ultricies rutrum. Donec aliquet elementum tincidunt. In viverra sem ante, vel imperdiet nisi facilisis non. Nunc interdum, urna at tempor semper, sapien justo feugiat nisl, condimentum finibus metus nibh in diam. Aliquam erat volutpat. Maecenas ut felis euismod, vehicula augue ut, aliquet lorem. Suspendisse iaculis, magna nec ullamcorper rhoncus, sapien ex pellentesque odio, ut interdum ante sapien eu erat. Donec quam orci, aliquet eu varius in, tincidunt eu est. Proin vitae est a lectus congue laoreet. Vestibulum id sodales mauris. Vestibulum eu lacus a felis tempus fringilla eu et nunc. Curabitur et imperdiet enim. Vivamus sollicitudin efficitur risus hendrerit euismod. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Nam sed auctor velit, sit amet facilisis nunc. Donec vestibulum convallis neque sed eleifend. Cras dapibus quis sem id sodales. Maecenas metus massa, facilisis quis scelerisque vel, commodo molestie enim. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Maecenas pulvinar ultrices nulla, vel convallis ex laoreet vel. Sed ornare dui eget ante luctus, mollis vehicula neque pulvinar. Nulla posuere, quam quis dapibus rutrum, arcu massa laoreet metus, at condimentum felis justo a est. Nullam pharetra est nunc, a accumsan metus pellentesque ut. Duis auctor justo sit amet tincidunt iaculis. Pellentesque sollicitudin mauris ut ligula suscipit sagittis. Nullam scelerisque tortor sed sem egestas, non auctor nulla fermentum. Aliquam ut nunc condimentum, pellentesque quam feugiat, lacinia elit. Fusce maximus nulla id justo efficitur, congue imperdiet purus feugiat. Pellentesque egestas ultrices tempus. Vestibulum interdum accumsan nulla quis ornare. Duis cursus vel ipsum nec mattis. Donec quam eros, convallis condimentum iaculis a, egestas id tellus. Nullam imperdiet velit sed purus porta, vitae vulputate elit vulputate. Vivamus in maximus libero. Etiam condimentum hendrerit bibendum. Morbi id urna eu erat placerat iaculis. Donec a vehicula purus, a tempus lacus. Mauris quis auctor metus. Maecenas id venenatis libero, nec faucibus est. Sed auctor scelerisque augue, vel efficitur sem sollicitudin quis. Aliquam non justo eu diam convallis posuere. Quisque consequat porta nulla. Nunc lacinia, eros pulvinar dictum mattis, justo lorem finibus nibh, non pellentesque justo metus vitae ligula. Interdum et malesuada fames ac ante ipsum primis in faucibus. Phasellus ac interdum lorem, in elementum mi. Suspendisse auctor ex eget efficitur porta. Nam mollis lectus a ipsum gravida, eget hendrerit metus blandit. Suspendisse potenti. Quisque aliquet augue ut facilisis porttitor. Ut dui felis, interdum vitae lectus sit amet, consequat accumsan felis. Etiam malesuada ipsum vitae lacinia condimentum. Aliquam ac turpis eu risus tincidunt molestie. Sed ac leo libero. Quisque rutrum lacus sit amet augue eleifend sollicitudin. Nulla facilisi. Praesent egestas tortor et nibh rutrum accumsan. Suspendisse potenti. Proin vehicula massa id pretium aliquet. Nunc sed euismod justo, a ullamcorper odio. In ullamcorper diam ut leo pellentesque, at sollicitudin dolor suscipit. Interdum et malesuada fames ac ante ipsum primis in faucibus. Proin felis leo, mollis ut eros ut, dapibus imperdiet diam. Donec iaculis placerat ante, ac commodo nibh luctus id. Suspendisse iaculis feugiat massa quis vehicula. Mauris consequat finibus posuere. Aenean non turpis et quam luctus mattis a id enim. Ut ullamcorper, felis et ultricies lobortis, velit tellus mattis justo, a malesuada odio turpis at nisl. In sed augue maximus, bibendum tellus nec, maximus sapien. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut sem lorem, rhoncus a congue a, tempor nec metus. Suspendisse potenti. Curabitur ultrices pretium odio, et sollicitudin mauris vehicula in. Aenean sed semper neque, vitae lobortis lectus. In id interdum velit. Duis tempus purus diam, vitae tincidunt lacus commodo egestas. Morbi vestibulum, magna eget sollicitudin efficitur, ex libero consectetur odio, sollicitudin tincidunt mauris ante ac velit. Mauris a augue lacus. In bibendum, dui a pellentesque sagittis, tortor risus dignissim enim, eu tristique velit odio sit amet ex. Cras eros leo, convallis sit amet posuere vel, lacinia at enim. Maecenas nec feugiat ipsum. Nunc pellentesque tortor vitae mauris dictum imperdiet. Phasellus porttitor lectus vel neque sollicitudin, nec commodo leo faucibus. Aliquam dignissim ut est in vulputate. Donec ultrices, ex ac molestie porta, ligula sem efficitur velit, at pretium nisl tellus vel nisi. Sed volutpat nisi sed risus vulputate efficitur. Praesent venenatis nisl quis diam condimentum aliquet. Vestibulum et turpis tincidunt, pharetra urna id, egestas diam. Aliquam vitae gravida enim, eu scelerisque dolor. Nunc placerat vitae nisi eget commodo. In tincidunt viverra pellentesque. Duis a lacinia felis. Sed pharetra nibh eget diam finibus, a euismod ipsum placerat."; + + return { + more: function() { + var start = Math.trunc( Math.random() * 1E9 ) % + (words.length - 200); + var text = words.substr(start).match( + /(?:^|(?:\.\s+))((?:[A-Z][^\.]+\.(?:\s+|$)){3})/ + ); + return text ? text[0].replace(/^\.\s+/,"") : next(); + } + }; + +})(); diff --git a/promise/eventemitter2.js b/promise/eventemitter2.js new file mode 100644 index 0000000..bde69e8 --- /dev/null +++ b/promise/eventemitter2.js @@ -0,0 +1,573 @@ +/*! + * EventEmitter2 + * https://github.com/hij1nx/EventEmitter2 + * + * Copyright (c) 2013 hij1nx + * Licensed under the MIT license. + */ +;!function(undefined) { + + var isArray = Array.isArray ? Array.isArray : function _isArray(obj) { + return Object.prototype.toString.call(obj) === "[object Array]"; + }; + var defaultMaxListeners = 10; + + function init() { + this._events = {}; + if (this._conf) { + configure.call(this, this._conf); + } + } + + function configure(conf) { + if (conf) { + + this._conf = conf; + + conf.delimiter && (this.delimiter = conf.delimiter); + conf.maxListeners && (this._events.maxListeners = conf.maxListeners); + conf.wildcard && (this.wildcard = conf.wildcard); + conf.newListener && (this.newListener = conf.newListener); + + if (this.wildcard) { + this.listenerTree = {}; + } + } + } + + function EventEmitter(conf) { + this._events = {}; + this.newListener = false; + configure.call(this, conf); + } + + // + // Attention, function return type now is array, always ! + // It has zero elements if no any matches found and one or more + // elements (leafs) if there are matches + // + function searchListenerTree(handlers, type, tree, i) { + if (!tree) { + return []; + } + var listeners=[], leaf, len, branch, xTree, xxTree, isolatedBranch, endReached, + typeLength = type.length, currentType = type[i], nextType = type[i+1]; + if (i === typeLength && tree._listeners) { + // + // If at the end of the event(s) list and the tree has listeners + // invoke those listeners. + // + if (typeof tree._listeners === 'function') { + handlers && handlers.push(tree._listeners); + return [tree]; + } else { + for (leaf = 0, len = tree._listeners.length; leaf < len; leaf++) { + handlers && handlers.push(tree._listeners[leaf]); + } + return [tree]; + } + } + + if ((currentType === '*' || currentType === '**') || tree[currentType]) { + // + // If the event emitted is '*' at this part + // or there is a concrete match at this patch + // + if (currentType === '*') { + for (branch in tree) { + if (branch !== '_listeners' && tree.hasOwnProperty(branch)) { + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i+1)); + } + } + return listeners; + } else if(currentType === '**') { + endReached = (i+1 === typeLength || (i+2 === typeLength && nextType === '*')); + if(endReached && tree._listeners) { + // The next element has a _listeners, add it to the handlers. + listeners = listeners.concat(searchListenerTree(handlers, type, tree, typeLength)); + } + + for (branch in tree) { + if (branch !== '_listeners' && tree.hasOwnProperty(branch)) { + if(branch === '*' || branch === '**') { + if(tree[branch]._listeners && !endReached) { + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], typeLength)); + } + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i)); + } else if(branch === nextType) { + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i+2)); + } else { + // No match on this one, shift into the tree but not in the type array. + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i)); + } + } + } + return listeners; + } + + listeners = listeners.concat(searchListenerTree(handlers, type, tree[currentType], i+1)); + } + + xTree = tree['*']; + if (xTree) { + // + // If the listener tree will allow any match for this part, + // then recursively explore all branches of the tree + // + searchListenerTree(handlers, type, xTree, i+1); + } + + xxTree = tree['**']; + if(xxTree) { + if(i < typeLength) { + if(xxTree._listeners) { + // If we have a listener on a '**', it will catch all, so add its handler. + searchListenerTree(handlers, type, xxTree, typeLength); + } + + // Build arrays of matching next branches and others. + for(branch in xxTree) { + if(branch !== '_listeners' && xxTree.hasOwnProperty(branch)) { + if(branch === nextType) { + // We know the next element will match, so jump twice. + searchListenerTree(handlers, type, xxTree[branch], i+2); + } else if(branch === currentType) { + // Current node matches, move into the tree. + searchListenerTree(handlers, type, xxTree[branch], i+1); + } else { + isolatedBranch = {}; + isolatedBranch[branch] = xxTree[branch]; + searchListenerTree(handlers, type, { '**': isolatedBranch }, i+1); + } + } + } + } else if(xxTree._listeners) { + // We have reached the end and still on a '**' + searchListenerTree(handlers, type, xxTree, typeLength); + } else if(xxTree['*'] && xxTree['*']._listeners) { + searchListenerTree(handlers, type, xxTree['*'], typeLength); + } + } + + return listeners; + } + + function growListenerTree(type, listener) { + + type = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + + // + // Looks for two consecutive '**', if so, don't add the event at all. + // + for(var i = 0, len = type.length; i+1 < len; i++) { + if(type[i] === '**' && type[i+1] === '**') { + return; + } + } + + var tree = this.listenerTree; + var name = type.shift(); + + while (name) { + + if (!tree[name]) { + tree[name] = {}; + } + + tree = tree[name]; + + if (type.length === 0) { + + if (!tree._listeners) { + tree._listeners = listener; + } + else if(typeof tree._listeners === 'function') { + tree._listeners = [tree._listeners, listener]; + } + else if (isArray(tree._listeners)) { + + tree._listeners.push(listener); + + if (!tree._listeners.warned) { + + var m = defaultMaxListeners; + + if (typeof this._events.maxListeners !== 'undefined') { + m = this._events.maxListeners; + } + + if (m > 0 && tree._listeners.length > m) { + + tree._listeners.warned = true; + console.error('(node) warning: possible EventEmitter memory ' + + 'leak detected. %d listeners added. ' + + 'Use emitter.setMaxListeners() to increase limit.', + tree._listeners.length); + console.trace(); + } + } + } + return true; + } + name = type.shift(); + } + return true; + } + + // By default EventEmitters will print a warning if more than + // 10 listeners are added to it. This is a useful default which + // helps finding memory leaks. + // + // Obviously not all Emitters should be limited to 10. This function allows + // that to be increased. Set to zero for unlimited. + + EventEmitter.prototype.delimiter = '.'; + + EventEmitter.prototype.setMaxListeners = function(n) { + this._events || init.call(this); + this._events.maxListeners = n; + if (!this._conf) this._conf = {}; + this._conf.maxListeners = n; + }; + + EventEmitter.prototype.event = ''; + + EventEmitter.prototype.once = function(event, fn) { + this.many(event, 1, fn); + return this; + }; + + EventEmitter.prototype.many = function(event, ttl, fn) { + var self = this; + + if (typeof fn !== 'function') { + throw new Error('many only accepts instances of Function'); + } + + function listener() { + if (--ttl === 0) { + self.off(event, listener); + } + fn.apply(this, arguments); + } + + listener._origin = fn; + + this.on(event, listener); + + return self; + }; + + EventEmitter.prototype.emit = function() { + + this._events || init.call(this); + + var type = arguments[0]; + + if (type === 'newListener' && !this.newListener) { + if (!this._events.newListener) { return false; } + } + + // Loop through the *_all* functions and invoke them. + if (this._all) { + var l = arguments.length; + var args = new Array(l - 1); + for (var i = 1; i < l; i++) args[i - 1] = arguments[i]; + for (i = 0, l = this._all.length; i < l; i++) { + this.event = type; + this._all[i].apply(this, args); + } + } + + // If there is no 'error' event listener then throw. + if (type === 'error') { + + if (!this._all && + !this._events.error && + !(this.wildcard && this.listenerTree.error)) { + + if (arguments[1] instanceof Error) { + throw arguments[1]; // Unhandled 'error' event + } else { + throw new Error("Uncaught, unspecified 'error' event."); + } + return false; + } + } + + var handler; + + if(this.wildcard) { + handler = []; + var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + searchListenerTree.call(this, handler, ns, this.listenerTree, 0); + } + else { + handler = this._events[type]; + } + + if (typeof handler === 'function') { + this.event = type; + if (arguments.length === 1) { + handler.call(this); + } + else if (arguments.length > 1) + switch (arguments.length) { + case 2: + handler.call(this, arguments[1]); + break; + case 3: + handler.call(this, arguments[1], arguments[2]); + break; + // slower + default: + var l = arguments.length; + var args = new Array(l - 1); + for (var i = 1; i < l; i++) args[i - 1] = arguments[i]; + handler.apply(this, args); + } + return true; + } + else if (handler) { + var l = arguments.length; + var args = new Array(l - 1); + for (var i = 1; i < l; i++) args[i - 1] = arguments[i]; + + var listeners = handler.slice(); + for (var i = 0, l = listeners.length; i < l; i++) { + this.event = type; + listeners[i].apply(this, args); + } + return (listeners.length > 0) || !!this._all; + } + else { + return !!this._all; + } + + }; + + EventEmitter.prototype.on = function(type, listener) { + + if (typeof type === 'function') { + this.onAny(type); + return this; + } + + if (typeof listener !== 'function') { + throw new Error('on only accepts instances of Function'); + } + this._events || init.call(this); + + // To avoid recursion in the case that type == "newListeners"! Before + // adding it to the listeners, first emit "newListeners". + this.emit('newListener', type, listener); + + if(this.wildcard) { + growListenerTree.call(this, type, listener); + return this; + } + + if (!this._events[type]) { + // Optimize the case of one listener. Don't need the extra array object. + this._events[type] = listener; + } + else if(typeof this._events[type] === 'function') { + // Adding the second element, need to change to array. + this._events[type] = [this._events[type], listener]; + } + else if (isArray(this._events[type])) { + // If we've already got an array, just append. + this._events[type].push(listener); + + // Check for listener leak + if (!this._events[type].warned) { + + var m = defaultMaxListeners; + + if (typeof this._events.maxListeners !== 'undefined') { + m = this._events.maxListeners; + } + + if (m > 0 && this._events[type].length > m) { + + this._events[type].warned = true; + console.error('(node) warning: possible EventEmitter memory ' + + 'leak detected. %d listeners added. ' + + 'Use emitter.setMaxListeners() to increase limit.', + this._events[type].length); + console.trace(); + } + } + } + return this; + }; + + EventEmitter.prototype.onAny = function(fn) { + + if (typeof fn !== 'function') { + throw new Error('onAny only accepts instances of Function'); + } + + if(!this._all) { + this._all = []; + } + + // Add the function to the event listener collection. + this._all.push(fn); + return this; + }; + + EventEmitter.prototype.addListener = EventEmitter.prototype.on; + + EventEmitter.prototype.off = function(type, listener) { + if (typeof listener !== 'function') { + throw new Error('removeListener only takes instances of Function'); + } + + var handlers,leafs=[]; + + if(this.wildcard) { + var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + leafs = searchListenerTree.call(this, null, ns, this.listenerTree, 0); + } + else { + // does not use listeners(), so no side effect of creating _events[type] + if (!this._events[type]) return this; + handlers = this._events[type]; + leafs.push({_listeners:handlers}); + } + + for (var iLeaf=0; iLeaf 0) { + fns = this._all; + for(i = 0, l = fns.length; i < l; i++) { + if(fn === fns[i]) { + fns.splice(i, 1); + return this; + } + } + } else { + this._all = []; + } + return this; + }; + + EventEmitter.prototype.removeListener = EventEmitter.prototype.off; + + EventEmitter.prototype.removeAllListeners = function(type) { + if (arguments.length === 0) { + !this._events || init.call(this); + return this; + } + + if(this.wildcard) { + var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + var leafs = searchListenerTree.call(this, null, ns, this.listenerTree, 0); + + for (var iLeaf=0; iLeaf + + + +A Tale Of Three Lists (Promises) + + + +

A Tale Of Three Lists (Promises)

+ +
+
+ +
+
+
+
+
+
+ +
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default; + max-height: inherit; + white-space: normal; + overflow: auto; + text-overflow: inherit; +} + +.first-list { + background-color: #ffb8b3; +} + +.second-list { + background-color: #b3caff; +} diff --git a/promise/ui.js b/promise/ui.js new file mode 100644 index 0000000..583cb7c --- /dev/null +++ b/promise/ui.js @@ -0,0 +1,269 @@ +(function UI(global){ + "use strict"; + + var $body, $feed_1, $feed_2, $my_feed, + $feed_1_content, $feed_2_content, + $my_feed_content, + + // signal event handler(s) + toggle_clicks, + item_clicks, + + // promise wrapper(s) + rAF, + docready; + + // pubsub hub + global.EVT = new EventEmitter2(); + + // run everything! + setup(); + + + // *********************************** + + function setup() { + // promise-wrapper for requestAnimationFrame event + // note: this is a one-time event, so promise OK + rAF = function rAF() { + return new Promise(function executor(resolve){ + requestAnimationFrame(resolve); + }); + }, + + // promise-wrapper for DOM-ready event + // note: this is a one-time event, so promise OK + docready = function docready() { + return new Promise(function executor(resolve){ + $(document).ready(resolve); + }); + }; + + // DOM event handlers from promises + toggle_clicks = promiseBasedEventHandler(function setupToggleClicks(pr){ + pr.then(toggleFeed); + }) + item_clicks = promiseBasedEventHandler(function setupItemClicks(pr){ + pr.then(selectItem); + }); + + // wait for DOM-ready + docready() + .then(DOMSetup); + + + // *********************************** + + function DOMSetup() { + $body = $(document.body); + + $feed_1 = $("[rel*=js-feed-1]"); + $feed_1_content = $feed_1.children("[rel*=js-content]"); + $feed_1.children("[rel*=js-toggle]") + .on("click",toggle_clicks); + + $feed_2 = $("[rel*=js-feed-2]"); + $feed_2_content = $feed_2.children("[rel*=js-content]"); + $feed_2.children("[rel*=js-toggle]") + .on("click",toggle_clicks); + + $my_feed = $("[rel*=js-my-feed]"); + $my_feed_content = $my_feed.children("[rel*=js-content]"); + $my_feed_content.on("click","[rel*=js-item]",noop); + + $feed_1.on("click","[rel*=js-item]",item_clicks); + $feed_2.on("click","[rel*=js-item]",item_clicks); + + EVT.on("feed-insertion",insertFeedItem); + EVT.on("my-feed-insertion",insertMyFeedItem); + EVT.on("feed-kill",killFeedItem); + + // signal the feeds setup to proceed + EVT.emit("setup-feeds"); + } + } + + function toggleFeed($btn) { + var $feed = $btn.closest("[rel*=js-feed-]"); + var feed_id = Number( $feed.attr("rel").substr(8) ); + var running = ($feed.attr("data-paused") !== "true"); + + // currently running feed? + if (running) { + // pause it + $feed.attr({ "data-paused": "true" }); + $btn.text("resume"); + } + // paused feed + else { + // resume it + $feed.removeAttr("data-paused"); + $btn.text("pause list"); + } + + // signal status message + EVT.emit("status-" + feed_id,!running); + } + + function insertFeedItem(feedID,itemText) { + var $content; + + // which feed to insert into? + if (feedID == 1) $content = $feed_1_content; + else if (feedID == 2) $content = $feed_2_content; + + var $item = $("") + .addClass("item") + .attr({ href: "#", rel: "js-item" }) + .text(itemText); + + $content.prepend($item); + + var $items = $content.children("[rel*=js-item]"); + if ($items.length > 20) { + $items.last().remove(); + } + } + + function selectItem($item) { + // item not yet killed? + if (!$item.is(".killed")) { + var $feed = $item.closest("[rel*=js-feed-]"); + var feed_id = Number( $feed.attr("rel").substr(8) ); + + // signal item selection + EVT.emit("item-selection",feed_id,$item.text(),$item); + } + } + + function insertMyFeedItem(feed_id,$item) { + var $floating_item = $item.clone().addClass("floating"); + + if (feed_id == 1) $floating_item.addClass("first-list"); + else if (feed_id == 2) $floating_item.addClass("second-list"); + + var item_dims = $item.offset(); + var item_margin_left = parseInt($item.css("margin-left"),10); + var item_margin_top = parseInt($item.css("margin-top"),10); + + $floating_item.css({ + left: (Math.round(item_dims.left) - item_margin_left) + "px", + top: (Math.round(item_dims.top) - item_margin_top) + "px" + }) + .appendTo($body); + + $item.remove(); + + // wait for the next animation frame (CSS junk) + rAF() + .then(afterRAF); + + + // *********************************** + + function afterRAF() { + var my_feed_dims = $my_feed_content.offset(); + + $floating_item.css({ + left: Math.round(my_feed_dims.left) + "px", + top: Math.round(my_feed_dims.top) + "px" + }); + + // wait for the transition to end + fromEventOnce($floating_item,"transitionend") + .then(afterTransitionEnd); + } + + function afterTransitionEnd() { + $floating_item + .unbind("transitionend") + .css({ left: "", top: "" }) + .removeClass("floating") + .prependTo($my_feed_content); + } + } + + function killFeedItem($item) { + $item.addClass("killed"); + + // wait for a second + var pr = new Promise(function resolver(resolve){ + setTimeout(resolve,1000); + }); + pr.then(function afterDelay(){ + $item.remove(); + }); + } + + // bridge DOM events to promises + function fromEventOnce($el,evtName,definePromiseChain) { + var tmp = extractPromiseResolvers(), + pr = tmp[0], + resolve = tmp[1]; + + $el.on(evtName,onevt); + + return pr; + + + // *********************************** + + function onevt(evt){ + noop(evt); + + // unbind event handler since promises are + // resolvable only once + $el.off(evtName,onevt); + + resolve($(evt.target)); + } + } + + function extractPromiseResolvers() { + var resolveFn, rejectFn, + p = new Promise(function resolver(resolve,reject){ + resolveFn = resolve; + rejectFn = reject; + }); + return [p,resolveFn,rejectFn]; + } + + function promiseBasedEventHandler(definePromiseChain) { + var pr, resolve, reject; + + // start out with a promise + getNextPromise(); + + return eventHandler; + + // *********************************** + + function eventHandler(evt) { + noop(evt); + + // resolve previous promise + resolve($(evt.target)); + + // get the next promise ready in case + // this event fires again + getNextPromise(); + } + + function getNextPromise() { + var tmp = extractPromiseResolvers(); + + pr = tmp[0]; + resolve = tmp[1]; + reject = tmp[2]; + + definePromiseChain(pr); + } + } + + function noop(evt) { + evt.preventDefault(); + evt.stopPropagation(); + evt.stopImmediatePropagation(); + } + +})(window); diff --git a/reactive-sequence/dummy-data.js b/reactive-sequence/dummy-data.js new file mode 100644 index 0000000..31c2a85 --- /dev/null +++ b/reactive-sequence/dummy-data.js @@ -0,0 +1,16 @@ +var ItemsText = (function(){ + + var words = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent vulputate consectetur sem sed efficitur. Nulla ac egestas velit. Cras elementum orci vel sodales dapibus. Etiam tempus ac mi eu elementum. Proin nibh lorem, luctus eget dolor eget, sollicitudin pharetra velit. Quisque scelerisque libero ut elit consectetur, vel placerat diam finibus. Vestibulum vitae velit eget orci mattis bibendum id sed nibh. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam bibendum nibh at nisi ullamcorper euismod. Phasellus sed varius metus. Nullam pretium ex id augue ultricies condimentum. Nunc nisl arcu, placerat quis condimentum in, consequat vel lectus. Pellentesque ullamcorper sed enim quis congue. Pellentesque et elit in dui fermentum tempor. Praesent enim quam, viverra sed ipsum non, iaculis aliquet libero. Maecenas quis egestas sem. Sed sit amet malesuada turpis. Nam tempor velit at nisi lacinia, at vestibulum dolor bibendum. Sed venenatis in eros quis blandit. Maecenas nec aliquet ex, at accumsan quam. Vestibulum semper, libero ac rhoncus facilisis, augue diam interdum ex, in eleifend turpis lorem euismod sem. Vivamus sit amet ipsum et nunc dignissim tincidunt vel eget risus. Sed et nunc tempus, cursus ante eget, egestas quam. Integer turpis nulla, rutrum a nunc non, maximus malesuada massa. Suspendisse vel egestas felis. Donec vehicula neque augue, sit amet mattis nulla pellentesque eu. Vestibulum gravida malesuada rhoncus. Curabitur rhoncus diam nunc, non dignissim risus ultrices at. Cras id ligula mattis, scelerisque diam nec, sagittis nibh. Quisque malesuada ipsum at magna molestie, ac ultricies ante consectetur. Vivamus turpis neque, faucibus et molestie vulputate, dictum at diam. Ut et massa vitae neque ultricies rutrum. Donec aliquet elementum tincidunt. In viverra sem ante, vel imperdiet nisi facilisis non. Nunc interdum, urna at tempor semper, sapien justo feugiat nisl, condimentum finibus metus nibh in diam. Aliquam erat volutpat. Maecenas ut felis euismod, vehicula augue ut, aliquet lorem. Suspendisse iaculis, magna nec ullamcorper rhoncus, sapien ex pellentesque odio, ut interdum ante sapien eu erat. Donec quam orci, aliquet eu varius in, tincidunt eu est. Proin vitae est a lectus congue laoreet. Vestibulum id sodales mauris. Vestibulum eu lacus a felis tempus fringilla eu et nunc. Curabitur et imperdiet enim. Vivamus sollicitudin efficitur risus hendrerit euismod. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Nam sed auctor velit, sit amet facilisis nunc. Donec vestibulum convallis neque sed eleifend. Cras dapibus quis sem id sodales. Maecenas metus massa, facilisis quis scelerisque vel, commodo molestie enim. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Maecenas pulvinar ultrices nulla, vel convallis ex laoreet vel. Sed ornare dui eget ante luctus, mollis vehicula neque pulvinar. Nulla posuere, quam quis dapibus rutrum, arcu massa laoreet metus, at condimentum felis justo a est. Nullam pharetra est nunc, a accumsan metus pellentesque ut. Duis auctor justo sit amet tincidunt iaculis. Pellentesque sollicitudin mauris ut ligula suscipit sagittis. Nullam scelerisque tortor sed sem egestas, non auctor nulla fermentum. Aliquam ut nunc condimentum, pellentesque quam feugiat, lacinia elit. Fusce maximus nulla id justo efficitur, congue imperdiet purus feugiat. Pellentesque egestas ultrices tempus. Vestibulum interdum accumsan nulla quis ornare. Duis cursus vel ipsum nec mattis. Donec quam eros, convallis condimentum iaculis a, egestas id tellus. Nullam imperdiet velit sed purus porta, vitae vulputate elit vulputate. Vivamus in maximus libero. Etiam condimentum hendrerit bibendum. Morbi id urna eu erat placerat iaculis. Donec a vehicula purus, a tempus lacus. Mauris quis auctor metus. Maecenas id venenatis libero, nec faucibus est. Sed auctor scelerisque augue, vel efficitur sem sollicitudin quis. Aliquam non justo eu diam convallis posuere. Quisque consequat porta nulla. Nunc lacinia, eros pulvinar dictum mattis, justo lorem finibus nibh, non pellentesque justo metus vitae ligula. Interdum et malesuada fames ac ante ipsum primis in faucibus. Phasellus ac interdum lorem, in elementum mi. Suspendisse auctor ex eget efficitur porta. Nam mollis lectus a ipsum gravida, eget hendrerit metus blandit. Suspendisse potenti. Quisque aliquet augue ut facilisis porttitor. Ut dui felis, interdum vitae lectus sit amet, consequat accumsan felis. Etiam malesuada ipsum vitae lacinia condimentum. Aliquam ac turpis eu risus tincidunt molestie. Sed ac leo libero. Quisque rutrum lacus sit amet augue eleifend sollicitudin. Nulla facilisi. Praesent egestas tortor et nibh rutrum accumsan. Suspendisse potenti. Proin vehicula massa id pretium aliquet. Nunc sed euismod justo, a ullamcorper odio. In ullamcorper diam ut leo pellentesque, at sollicitudin dolor suscipit. Interdum et malesuada fames ac ante ipsum primis in faucibus. Proin felis leo, mollis ut eros ut, dapibus imperdiet diam. Donec iaculis placerat ante, ac commodo nibh luctus id. Suspendisse iaculis feugiat massa quis vehicula. Mauris consequat finibus posuere. Aenean non turpis et quam luctus mattis a id enim. Ut ullamcorper, felis et ultricies lobortis, velit tellus mattis justo, a malesuada odio turpis at nisl. In sed augue maximus, bibendum tellus nec, maximus sapien. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut sem lorem, rhoncus a congue a, tempor nec metus. Suspendisse potenti. Curabitur ultrices pretium odio, et sollicitudin mauris vehicula in. Aenean sed semper neque, vitae lobortis lectus. In id interdum velit. Duis tempus purus diam, vitae tincidunt lacus commodo egestas. Morbi vestibulum, magna eget sollicitudin efficitur, ex libero consectetur odio, sollicitudin tincidunt mauris ante ac velit. Mauris a augue lacus. In bibendum, dui a pellentesque sagittis, tortor risus dignissim enim, eu tristique velit odio sit amet ex. Cras eros leo, convallis sit amet posuere vel, lacinia at enim. Maecenas nec feugiat ipsum. Nunc pellentesque tortor vitae mauris dictum imperdiet. Phasellus porttitor lectus vel neque sollicitudin, nec commodo leo faucibus. Aliquam dignissim ut est in vulputate. Donec ultrices, ex ac molestie porta, ligula sem efficitur velit, at pretium nisl tellus vel nisi. Sed volutpat nisi sed risus vulputate efficitur. Praesent venenatis nisl quis diam condimentum aliquet. Vestibulum et turpis tincidunt, pharetra urna id, egestas diam. Aliquam vitae gravida enim, eu scelerisque dolor. Nunc placerat vitae nisi eget commodo. In tincidunt viverra pellentesque. Duis a lacinia felis. Sed pharetra nibh eget diam finibus, a euismod ipsum placerat."; + + return { + more: function() { + var start = Math.trunc( Math.random() * 1E9 ) % + (words.length - 200); + var text = words.substr(start).match( + /(?:^|(?:\.\s+))((?:[A-Z][^\.]+\.(?:\s+|$)){3})/ + ); + return text ? text[0].replace(/^\.\s+/,"") : next(); + } + }; + +})(); diff --git a/reactive-sequence/eventemitter2.js b/reactive-sequence/eventemitter2.js new file mode 100644 index 0000000..bde69e8 --- /dev/null +++ b/reactive-sequence/eventemitter2.js @@ -0,0 +1,573 @@ +/*! + * EventEmitter2 + * https://github.com/hij1nx/EventEmitter2 + * + * Copyright (c) 2013 hij1nx + * Licensed under the MIT license. + */ +;!function(undefined) { + + var isArray = Array.isArray ? Array.isArray : function _isArray(obj) { + return Object.prototype.toString.call(obj) === "[object Array]"; + }; + var defaultMaxListeners = 10; + + function init() { + this._events = {}; + if (this._conf) { + configure.call(this, this._conf); + } + } + + function configure(conf) { + if (conf) { + + this._conf = conf; + + conf.delimiter && (this.delimiter = conf.delimiter); + conf.maxListeners && (this._events.maxListeners = conf.maxListeners); + conf.wildcard && (this.wildcard = conf.wildcard); + conf.newListener && (this.newListener = conf.newListener); + + if (this.wildcard) { + this.listenerTree = {}; + } + } + } + + function EventEmitter(conf) { + this._events = {}; + this.newListener = false; + configure.call(this, conf); + } + + // + // Attention, function return type now is array, always ! + // It has zero elements if no any matches found and one or more + // elements (leafs) if there are matches + // + function searchListenerTree(handlers, type, tree, i) { + if (!tree) { + return []; + } + var listeners=[], leaf, len, branch, xTree, xxTree, isolatedBranch, endReached, + typeLength = type.length, currentType = type[i], nextType = type[i+1]; + if (i === typeLength && tree._listeners) { + // + // If at the end of the event(s) list and the tree has listeners + // invoke those listeners. + // + if (typeof tree._listeners === 'function') { + handlers && handlers.push(tree._listeners); + return [tree]; + } else { + for (leaf = 0, len = tree._listeners.length; leaf < len; leaf++) { + handlers && handlers.push(tree._listeners[leaf]); + } + return [tree]; + } + } + + if ((currentType === '*' || currentType === '**') || tree[currentType]) { + // + // If the event emitted is '*' at this part + // or there is a concrete match at this patch + // + if (currentType === '*') { + for (branch in tree) { + if (branch !== '_listeners' && tree.hasOwnProperty(branch)) { + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i+1)); + } + } + return listeners; + } else if(currentType === '**') { + endReached = (i+1 === typeLength || (i+2 === typeLength && nextType === '*')); + if(endReached && tree._listeners) { + // The next element has a _listeners, add it to the handlers. + listeners = listeners.concat(searchListenerTree(handlers, type, tree, typeLength)); + } + + for (branch in tree) { + if (branch !== '_listeners' && tree.hasOwnProperty(branch)) { + if(branch === '*' || branch === '**') { + if(tree[branch]._listeners && !endReached) { + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], typeLength)); + } + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i)); + } else if(branch === nextType) { + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i+2)); + } else { + // No match on this one, shift into the tree but not in the type array. + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i)); + } + } + } + return listeners; + } + + listeners = listeners.concat(searchListenerTree(handlers, type, tree[currentType], i+1)); + } + + xTree = tree['*']; + if (xTree) { + // + // If the listener tree will allow any match for this part, + // then recursively explore all branches of the tree + // + searchListenerTree(handlers, type, xTree, i+1); + } + + xxTree = tree['**']; + if(xxTree) { + if(i < typeLength) { + if(xxTree._listeners) { + // If we have a listener on a '**', it will catch all, so add its handler. + searchListenerTree(handlers, type, xxTree, typeLength); + } + + // Build arrays of matching next branches and others. + for(branch in xxTree) { + if(branch !== '_listeners' && xxTree.hasOwnProperty(branch)) { + if(branch === nextType) { + // We know the next element will match, so jump twice. + searchListenerTree(handlers, type, xxTree[branch], i+2); + } else if(branch === currentType) { + // Current node matches, move into the tree. + searchListenerTree(handlers, type, xxTree[branch], i+1); + } else { + isolatedBranch = {}; + isolatedBranch[branch] = xxTree[branch]; + searchListenerTree(handlers, type, { '**': isolatedBranch }, i+1); + } + } + } + } else if(xxTree._listeners) { + // We have reached the end and still on a '**' + searchListenerTree(handlers, type, xxTree, typeLength); + } else if(xxTree['*'] && xxTree['*']._listeners) { + searchListenerTree(handlers, type, xxTree['*'], typeLength); + } + } + + return listeners; + } + + function growListenerTree(type, listener) { + + type = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + + // + // Looks for two consecutive '**', if so, don't add the event at all. + // + for(var i = 0, len = type.length; i+1 < len; i++) { + if(type[i] === '**' && type[i+1] === '**') { + return; + } + } + + var tree = this.listenerTree; + var name = type.shift(); + + while (name) { + + if (!tree[name]) { + tree[name] = {}; + } + + tree = tree[name]; + + if (type.length === 0) { + + if (!tree._listeners) { + tree._listeners = listener; + } + else if(typeof tree._listeners === 'function') { + tree._listeners = [tree._listeners, listener]; + } + else if (isArray(tree._listeners)) { + + tree._listeners.push(listener); + + if (!tree._listeners.warned) { + + var m = defaultMaxListeners; + + if (typeof this._events.maxListeners !== 'undefined') { + m = this._events.maxListeners; + } + + if (m > 0 && tree._listeners.length > m) { + + tree._listeners.warned = true; + console.error('(node) warning: possible EventEmitter memory ' + + 'leak detected. %d listeners added. ' + + 'Use emitter.setMaxListeners() to increase limit.', + tree._listeners.length); + console.trace(); + } + } + } + return true; + } + name = type.shift(); + } + return true; + } + + // By default EventEmitters will print a warning if more than + // 10 listeners are added to it. This is a useful default which + // helps finding memory leaks. + // + // Obviously not all Emitters should be limited to 10. This function allows + // that to be increased. Set to zero for unlimited. + + EventEmitter.prototype.delimiter = '.'; + + EventEmitter.prototype.setMaxListeners = function(n) { + this._events || init.call(this); + this._events.maxListeners = n; + if (!this._conf) this._conf = {}; + this._conf.maxListeners = n; + }; + + EventEmitter.prototype.event = ''; + + EventEmitter.prototype.once = function(event, fn) { + this.many(event, 1, fn); + return this; + }; + + EventEmitter.prototype.many = function(event, ttl, fn) { + var self = this; + + if (typeof fn !== 'function') { + throw new Error('many only accepts instances of Function'); + } + + function listener() { + if (--ttl === 0) { + self.off(event, listener); + } + fn.apply(this, arguments); + } + + listener._origin = fn; + + this.on(event, listener); + + return self; + }; + + EventEmitter.prototype.emit = function() { + + this._events || init.call(this); + + var type = arguments[0]; + + if (type === 'newListener' && !this.newListener) { + if (!this._events.newListener) { return false; } + } + + // Loop through the *_all* functions and invoke them. + if (this._all) { + var l = arguments.length; + var args = new Array(l - 1); + for (var i = 1; i < l; i++) args[i - 1] = arguments[i]; + for (i = 0, l = this._all.length; i < l; i++) { + this.event = type; + this._all[i].apply(this, args); + } + } + + // If there is no 'error' event listener then throw. + if (type === 'error') { + + if (!this._all && + !this._events.error && + !(this.wildcard && this.listenerTree.error)) { + + if (arguments[1] instanceof Error) { + throw arguments[1]; // Unhandled 'error' event + } else { + throw new Error("Uncaught, unspecified 'error' event."); + } + return false; + } + } + + var handler; + + if(this.wildcard) { + handler = []; + var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + searchListenerTree.call(this, handler, ns, this.listenerTree, 0); + } + else { + handler = this._events[type]; + } + + if (typeof handler === 'function') { + this.event = type; + if (arguments.length === 1) { + handler.call(this); + } + else if (arguments.length > 1) + switch (arguments.length) { + case 2: + handler.call(this, arguments[1]); + break; + case 3: + handler.call(this, arguments[1], arguments[2]); + break; + // slower + default: + var l = arguments.length; + var args = new Array(l - 1); + for (var i = 1; i < l; i++) args[i - 1] = arguments[i]; + handler.apply(this, args); + } + return true; + } + else if (handler) { + var l = arguments.length; + var args = new Array(l - 1); + for (var i = 1; i < l; i++) args[i - 1] = arguments[i]; + + var listeners = handler.slice(); + for (var i = 0, l = listeners.length; i < l; i++) { + this.event = type; + listeners[i].apply(this, args); + } + return (listeners.length > 0) || !!this._all; + } + else { + return !!this._all; + } + + }; + + EventEmitter.prototype.on = function(type, listener) { + + if (typeof type === 'function') { + this.onAny(type); + return this; + } + + if (typeof listener !== 'function') { + throw new Error('on only accepts instances of Function'); + } + this._events || init.call(this); + + // To avoid recursion in the case that type == "newListeners"! Before + // adding it to the listeners, first emit "newListeners". + this.emit('newListener', type, listener); + + if(this.wildcard) { + growListenerTree.call(this, type, listener); + return this; + } + + if (!this._events[type]) { + // Optimize the case of one listener. Don't need the extra array object. + this._events[type] = listener; + } + else if(typeof this._events[type] === 'function') { + // Adding the second element, need to change to array. + this._events[type] = [this._events[type], listener]; + } + else if (isArray(this._events[type])) { + // If we've already got an array, just append. + this._events[type].push(listener); + + // Check for listener leak + if (!this._events[type].warned) { + + var m = defaultMaxListeners; + + if (typeof this._events.maxListeners !== 'undefined') { + m = this._events.maxListeners; + } + + if (m > 0 && this._events[type].length > m) { + + this._events[type].warned = true; + console.error('(node) warning: possible EventEmitter memory ' + + 'leak detected. %d listeners added. ' + + 'Use emitter.setMaxListeners() to increase limit.', + this._events[type].length); + console.trace(); + } + } + } + return this; + }; + + EventEmitter.prototype.onAny = function(fn) { + + if (typeof fn !== 'function') { + throw new Error('onAny only accepts instances of Function'); + } + + if(!this._all) { + this._all = []; + } + + // Add the function to the event listener collection. + this._all.push(fn); + return this; + }; + + EventEmitter.prototype.addListener = EventEmitter.prototype.on; + + EventEmitter.prototype.off = function(type, listener) { + if (typeof listener !== 'function') { + throw new Error('removeListener only takes instances of Function'); + } + + var handlers,leafs=[]; + + if(this.wildcard) { + var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + leafs = searchListenerTree.call(this, null, ns, this.listenerTree, 0); + } + else { + // does not use listeners(), so no side effect of creating _events[type] + if (!this._events[type]) return this; + handlers = this._events[type]; + leafs.push({_listeners:handlers}); + } + + for (var iLeaf=0; iLeaf 0) { + fns = this._all; + for(i = 0, l = fns.length; i < l; i++) { + if(fn === fns[i]) { + fns.splice(i, 1); + return this; + } + } + } else { + this._all = []; + } + return this; + }; + + EventEmitter.prototype.removeListener = EventEmitter.prototype.off; + + EventEmitter.prototype.removeAllListeners = function(type) { + if (arguments.length === 0) { + !this._events || init.call(this); + return this; + } + + if(this.wildcard) { + var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + var leafs = searchListenerTree.call(this, null, ns, this.listenerTree, 0); + + for (var iLeaf=0; iLeaf + + + +A Tale Of Three Lists (Reactive Sequences) + + + +

A Tale Of Three Lists (Reactive Sequences)

+ +
+
+ +
+
+
+
+
+
+ +
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+#my-feed { + padding: 5px 15px; + margin: 0px 30px; + display: inline-block; + position: relative; + width: 400px; + height: 500px; + border: 3px solid #000; + background-color: #f0f0f0; + vertical-align: top; +} + +#feed-1 > .content, +#feed-2 > .content, +#my-feed > .content { + position: relative; + width: 100%; + height: 100%; + overflow-y: scroll; +} + +.item { + display: block; + position: relative; + margin: 10px 0px; + padding: 5px; + width: 100%; + color: #000; + overflow: hidden; + white-space: nowrap; + text-decoration: none; + text-overflow: ellipsis; +} + +.item.floating { + cursor: default; + position: absolute; + transition: left 0.3s ease-out, top 0.3s ease-out; + max-width: 214px; + max-height: 100px; +} + +.item.killed { + text-decoration: line-through; +} + +#feed-1 > .content > .item, +#feed-2 > .content > .item { + max-height: 100px; +} + +#feed-1 > .content > .item:hover, +#feed-2 > .content > .item:hover { + background-color: rgba(0,0,0,0.1); +} + +#my-feed > .content > .item { + cursor: default; + max-height: inherit; + white-space: normal; + overflow: auto; + text-overflow: inherit; +} + +.first-list { + background-color: #ffb8b3; +} + +.second-list { + background-color: #b3caff; +} diff --git a/reactive-sequence/ui.js b/reactive-sequence/ui.js new file mode 100644 index 0000000..02abb20 --- /dev/null +++ b/reactive-sequence/ui.js @@ -0,0 +1,203 @@ +(function UI(global){ + "use strict"; + + var Ar = ASQ.react, // namespace shortcut + + $body, $feed_1, $feed_2, $my_feed, + $feed_1_content, $feed_2_content, + $my_feed_content, + + // signal sequence(s) + toggle_clicks, + item_clicks, + + // promise wrapper(s) + rAF, + docready; + + // pubsub hub + global.EVT = new EventEmitter2(); + + // run everything! + ASQ().runner(setup); + + + // *********************************** + + function *setup() { + // promise-wrapper for requestAnimationFrame event + rAF = ASQ.wrap( + requestAnimationFrame, + { this: window, simplecb: true } + ), + + // promise-wrapper for DOM-ready event + docready = ASQ.wrap( + $(document).ready, + { simplecb: true } + ); + + // reactive sequences for DOM events + toggle_clicks = Ar.of().val(toggleFeed); + item_clicks = Ar.of().val(selectItem); + + // wait for DOM-ready + yield docready(); + + $body = $(document.body); + + $feed_1 = $("[rel*=js-feed-1]"); + $feed_1_content = $feed_1.children("[rel*=js-content]"); + $feed_1.children("[rel*=js-toggle]") + .on("click",seqToEventHandler(toggle_clicks)); + + $feed_2 = $("[rel*=js-feed-2]"); + $feed_2_content = $feed_2.children("[rel*=js-content]"); + $feed_2.children("[rel*=js-toggle]") + .on("click",seqToEventHandler(toggle_clicks)); + + $my_feed = $("[rel*=js-my-feed]"); + $my_feed_content = $my_feed.children("[rel*=js-content]"); + $my_feed_content.on("click","[rel*=js-item]",noop); + + $feed_1.on("click","[rel*=js-item]",seqToEventHandler(item_clicks)); + $feed_2.on("click","[rel*=js-item]",seqToEventHandler(item_clicks)); + + EVT.on("feed-insertion",insertFeedItem); + EVT.on("my-feed-insertion", + ASQ.wrap(insertMyFeedItem,{ gen: true }) + ); + EVT.on("feed-kill", + ASQ.wrap(killFeedItem,{ gen: true }) + ); + + // signal the feeds setup to proceed + EVT.emit("setup-feeds"); + } + + function toggleFeed($btn) { + var $feed = $btn.closest("[rel*=js-feed-]"); + var feed_id = Number( $feed.attr("rel").substr(8) ); + var running = ($feed.attr("data-paused") !== "true"); + + // currently running feed? + if (running) { + // pause it + $feed.attr({ "data-paused": "true" }); + $btn.text("resume"); + } + // paused feed + else { + // resume it + $feed.removeAttr("data-paused"); + $btn.text("pause list"); + } + + // signal status message + EVT.emit("status-" + feed_id,!running); + } + + function insertFeedItem(feedID,itemText) { + var $content; + + // which feed to insert into? + if (feedID == 1) $content = $feed_1_content; + else if (feedID == 2) $content = $feed_2_content; + + var $item = $("") + .addClass("item") + .attr({ href: "#", rel: "js-item" }) + .text(itemText); + + $content.prepend($item); + + var $items = $content.children("[rel*=js-item]"); + if ($items.length > 20) { + $items.last().remove(); + } + } + + function selectItem($item) { + // item not yet killed? + if (!$item.is(".killed")) { + var $feed = $item.closest("[rel*=js-feed-]"); + var feed_id = Number( $feed.attr("rel").substr(8) ); + + // signal item selection + EVT.emit("item-selection",feed_id,$item.text(),$item); + } + } + + function *insertMyFeedItem(token) { + var feed_id = token.messages[0]; + var $item = token.messages[1]; + var $floating_item = $item.clone().addClass("floating"); + + if (feed_id == 1) $floating_item.addClass("first-list"); + else if (feed_id == 2) $floating_item.addClass("second-list"); + + var item_dims = $item.offset(); + var item_margin_left = parseInt($item.css("margin-left"),10); + var item_margin_top = parseInt($item.css("margin-top"),10); + + $floating_item.css({ + left: (Math.round(item_dims.left) - item_margin_left) + "px", + top: (Math.round(item_dims.top) - item_margin_top) + "px" + }) + .appendTo($body); + + $item.remove(); + + // wait for the next animation frame (CSS junk) + yield rAF(); + + var my_feed_dims = $my_feed_content.offset(); + + $floating_item.css({ + left: Math.round(my_feed_dims.left) + "px", + top: Math.round(my_feed_dims.top) + "px" + }); + + // wait for the transition to end + yield fromEvent($floating_item,"transitionend"); + + $floating_item + .unbind("transitionend") + .css({ left: "", top: "" }) + .removeClass("floating") + .prependTo($my_feed_content); + } + + function *killFeedItem(token) { + var $item = token.messages[0]; + + $item.addClass("killed"); + + // wait for a second + yield ASQ.after(1000); + + $item.remove(); + } + + // bridge DOM events to reactive sequence events + function fromEvent($el,evtName) { + var rsq = Ar.of(); + $el.on(evtName,seqToEventHandler(rsq)); + return rsq; + } + + // wrap reactive sequence event as DOM event handler + function seqToEventHandler(rsq) { + return function handler(evt) { + noop(evt); + rsq.push($(evt.target)); + }; + } + + function noop(evt) { + evt.preventDefault(); + evt.stopPropagation(); + evt.stopImmediatePropagation(); + } + +})(window); diff --git a/screen.png b/screen.png new file mode 100644 index 0000000..11449e7 Binary files /dev/null and b/screen.png differ diff --git a/thunk/dummy-data.js b/thunk/dummy-data.js new file mode 100644 index 0000000..31c2a85 --- /dev/null +++ b/thunk/dummy-data.js @@ -0,0 +1,16 @@ +var ItemsText = (function(){ + + var words = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent vulputate consectetur sem sed efficitur. Nulla ac egestas velit. Cras elementum orci vel sodales dapibus. Etiam tempus ac mi eu elementum. Proin nibh lorem, luctus eget dolor eget, sollicitudin pharetra velit. Quisque scelerisque libero ut elit consectetur, vel placerat diam finibus. Vestibulum vitae velit eget orci mattis bibendum id sed nibh. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam bibendum nibh at nisi ullamcorper euismod. Phasellus sed varius metus. Nullam pretium ex id augue ultricies condimentum. Nunc nisl arcu, placerat quis condimentum in, consequat vel lectus. Pellentesque ullamcorper sed enim quis congue. Pellentesque et elit in dui fermentum tempor. Praesent enim quam, viverra sed ipsum non, iaculis aliquet libero. Maecenas quis egestas sem. Sed sit amet malesuada turpis. Nam tempor velit at nisi lacinia, at vestibulum dolor bibendum. Sed venenatis in eros quis blandit. Maecenas nec aliquet ex, at accumsan quam. Vestibulum semper, libero ac rhoncus facilisis, augue diam interdum ex, in eleifend turpis lorem euismod sem. Vivamus sit amet ipsum et nunc dignissim tincidunt vel eget risus. Sed et nunc tempus, cursus ante eget, egestas quam. Integer turpis nulla, rutrum a nunc non, maximus malesuada massa. Suspendisse vel egestas felis. Donec vehicula neque augue, sit amet mattis nulla pellentesque eu. Vestibulum gravida malesuada rhoncus. Curabitur rhoncus diam nunc, non dignissim risus ultrices at. Cras id ligula mattis, scelerisque diam nec, sagittis nibh. Quisque malesuada ipsum at magna molestie, ac ultricies ante consectetur. Vivamus turpis neque, faucibus et molestie vulputate, dictum at diam. Ut et massa vitae neque ultricies rutrum. Donec aliquet elementum tincidunt. In viverra sem ante, vel imperdiet nisi facilisis non. Nunc interdum, urna at tempor semper, sapien justo feugiat nisl, condimentum finibus metus nibh in diam. Aliquam erat volutpat. Maecenas ut felis euismod, vehicula augue ut, aliquet lorem. Suspendisse iaculis, magna nec ullamcorper rhoncus, sapien ex pellentesque odio, ut interdum ante sapien eu erat. Donec quam orci, aliquet eu varius in, tincidunt eu est. Proin vitae est a lectus congue laoreet. Vestibulum id sodales mauris. Vestibulum eu lacus a felis tempus fringilla eu et nunc. Curabitur et imperdiet enim. Vivamus sollicitudin efficitur risus hendrerit euismod. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Nam sed auctor velit, sit amet facilisis nunc. Donec vestibulum convallis neque sed eleifend. Cras dapibus quis sem id sodales. Maecenas metus massa, facilisis quis scelerisque vel, commodo molestie enim. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Maecenas pulvinar ultrices nulla, vel convallis ex laoreet vel. Sed ornare dui eget ante luctus, mollis vehicula neque pulvinar. Nulla posuere, quam quis dapibus rutrum, arcu massa laoreet metus, at condimentum felis justo a est. Nullam pharetra est nunc, a accumsan metus pellentesque ut. Duis auctor justo sit amet tincidunt iaculis. Pellentesque sollicitudin mauris ut ligula suscipit sagittis. Nullam scelerisque tortor sed sem egestas, non auctor nulla fermentum. Aliquam ut nunc condimentum, pellentesque quam feugiat, lacinia elit. Fusce maximus nulla id justo efficitur, congue imperdiet purus feugiat. Pellentesque egestas ultrices tempus. Vestibulum interdum accumsan nulla quis ornare. Duis cursus vel ipsum nec mattis. Donec quam eros, convallis condimentum iaculis a, egestas id tellus. Nullam imperdiet velit sed purus porta, vitae vulputate elit vulputate. Vivamus in maximus libero. Etiam condimentum hendrerit bibendum. Morbi id urna eu erat placerat iaculis. Donec a vehicula purus, a tempus lacus. Mauris quis auctor metus. Maecenas id venenatis libero, nec faucibus est. Sed auctor scelerisque augue, vel efficitur sem sollicitudin quis. Aliquam non justo eu diam convallis posuere. Quisque consequat porta nulla. Nunc lacinia, eros pulvinar dictum mattis, justo lorem finibus nibh, non pellentesque justo metus vitae ligula. Interdum et malesuada fames ac ante ipsum primis in faucibus. Phasellus ac interdum lorem, in elementum mi. Suspendisse auctor ex eget efficitur porta. Nam mollis lectus a ipsum gravida, eget hendrerit metus blandit. Suspendisse potenti. Quisque aliquet augue ut facilisis porttitor. Ut dui felis, interdum vitae lectus sit amet, consequat accumsan felis. Etiam malesuada ipsum vitae lacinia condimentum. Aliquam ac turpis eu risus tincidunt molestie. Sed ac leo libero. Quisque rutrum lacus sit amet augue eleifend sollicitudin. Nulla facilisi. Praesent egestas tortor et nibh rutrum accumsan. Suspendisse potenti. Proin vehicula massa id pretium aliquet. Nunc sed euismod justo, a ullamcorper odio. In ullamcorper diam ut leo pellentesque, at sollicitudin dolor suscipit. Interdum et malesuada fames ac ante ipsum primis in faucibus. Proin felis leo, mollis ut eros ut, dapibus imperdiet diam. Donec iaculis placerat ante, ac commodo nibh luctus id. Suspendisse iaculis feugiat massa quis vehicula. Mauris consequat finibus posuere. Aenean non turpis et quam luctus mattis a id enim. Ut ullamcorper, felis et ultricies lobortis, velit tellus mattis justo, a malesuada odio turpis at nisl. In sed augue maximus, bibendum tellus nec, maximus sapien. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut sem lorem, rhoncus a congue a, tempor nec metus. Suspendisse potenti. Curabitur ultrices pretium odio, et sollicitudin mauris vehicula in. Aenean sed semper neque, vitae lobortis lectus. In id interdum velit. Duis tempus purus diam, vitae tincidunt lacus commodo egestas. Morbi vestibulum, magna eget sollicitudin efficitur, ex libero consectetur odio, sollicitudin tincidunt mauris ante ac velit. Mauris a augue lacus. In bibendum, dui a pellentesque sagittis, tortor risus dignissim enim, eu tristique velit odio sit amet ex. Cras eros leo, convallis sit amet posuere vel, lacinia at enim. Maecenas nec feugiat ipsum. Nunc pellentesque tortor vitae mauris dictum imperdiet. Phasellus porttitor lectus vel neque sollicitudin, nec commodo leo faucibus. Aliquam dignissim ut est in vulputate. Donec ultrices, ex ac molestie porta, ligula sem efficitur velit, at pretium nisl tellus vel nisi. Sed volutpat nisi sed risus vulputate efficitur. Praesent venenatis nisl quis diam condimentum aliquet. Vestibulum et turpis tincidunt, pharetra urna id, egestas diam. Aliquam vitae gravida enim, eu scelerisque dolor. Nunc placerat vitae nisi eget commodo. In tincidunt viverra pellentesque. Duis a lacinia felis. Sed pharetra nibh eget diam finibus, a euismod ipsum placerat."; + + return { + more: function() { + var start = Math.trunc( Math.random() * 1E9 ) % + (words.length - 200); + var text = words.substr(start).match( + /(?:^|(?:\.\s+))((?:[A-Z][^\.]+\.(?:\s+|$)){3})/ + ); + return text ? text[0].replace(/^\.\s+/,"") : next(); + } + }; + +})(); diff --git a/thunk/eventemitter2.js b/thunk/eventemitter2.js new file mode 100644 index 0000000..bde69e8 --- /dev/null +++ b/thunk/eventemitter2.js @@ -0,0 +1,573 @@ +/*! + * EventEmitter2 + * https://github.com/hij1nx/EventEmitter2 + * + * Copyright (c) 2013 hij1nx + * Licensed under the MIT license. + */ +;!function(undefined) { + + var isArray = Array.isArray ? Array.isArray : function _isArray(obj) { + return Object.prototype.toString.call(obj) === "[object Array]"; + }; + var defaultMaxListeners = 10; + + function init() { + this._events = {}; + if (this._conf) { + configure.call(this, this._conf); + } + } + + function configure(conf) { + if (conf) { + + this._conf = conf; + + conf.delimiter && (this.delimiter = conf.delimiter); + conf.maxListeners && (this._events.maxListeners = conf.maxListeners); + conf.wildcard && (this.wildcard = conf.wildcard); + conf.newListener && (this.newListener = conf.newListener); + + if (this.wildcard) { + this.listenerTree = {}; + } + } + } + + function EventEmitter(conf) { + this._events = {}; + this.newListener = false; + configure.call(this, conf); + } + + // + // Attention, function return type now is array, always ! + // It has zero elements if no any matches found and one or more + // elements (leafs) if there are matches + // + function searchListenerTree(handlers, type, tree, i) { + if (!tree) { + return []; + } + var listeners=[], leaf, len, branch, xTree, xxTree, isolatedBranch, endReached, + typeLength = type.length, currentType = type[i], nextType = type[i+1]; + if (i === typeLength && tree._listeners) { + // + // If at the end of the event(s) list and the tree has listeners + // invoke those listeners. + // + if (typeof tree._listeners === 'function') { + handlers && handlers.push(tree._listeners); + return [tree]; + } else { + for (leaf = 0, len = tree._listeners.length; leaf < len; leaf++) { + handlers && handlers.push(tree._listeners[leaf]); + } + return [tree]; + } + } + + if ((currentType === '*' || currentType === '**') || tree[currentType]) { + // + // If the event emitted is '*' at this part + // or there is a concrete match at this patch + // + if (currentType === '*') { + for (branch in tree) { + if (branch !== '_listeners' && tree.hasOwnProperty(branch)) { + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i+1)); + } + } + return listeners; + } else if(currentType === '**') { + endReached = (i+1 === typeLength || (i+2 === typeLength && nextType === '*')); + if(endReached && tree._listeners) { + // The next element has a _listeners, add it to the handlers. + listeners = listeners.concat(searchListenerTree(handlers, type, tree, typeLength)); + } + + for (branch in tree) { + if (branch !== '_listeners' && tree.hasOwnProperty(branch)) { + if(branch === '*' || branch === '**') { + if(tree[branch]._listeners && !endReached) { + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], typeLength)); + } + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i)); + } else if(branch === nextType) { + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i+2)); + } else { + // No match on this one, shift into the tree but not in the type array. + listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i)); + } + } + } + return listeners; + } + + listeners = listeners.concat(searchListenerTree(handlers, type, tree[currentType], i+1)); + } + + xTree = tree['*']; + if (xTree) { + // + // If the listener tree will allow any match for this part, + // then recursively explore all branches of the tree + // + searchListenerTree(handlers, type, xTree, i+1); + } + + xxTree = tree['**']; + if(xxTree) { + if(i < typeLength) { + if(xxTree._listeners) { + // If we have a listener on a '**', it will catch all, so add its handler. + searchListenerTree(handlers, type, xxTree, typeLength); + } + + // Build arrays of matching next branches and others. + for(branch in xxTree) { + if(branch !== '_listeners' && xxTree.hasOwnProperty(branch)) { + if(branch === nextType) { + // We know the next element will match, so jump twice. + searchListenerTree(handlers, type, xxTree[branch], i+2); + } else if(branch === currentType) { + // Current node matches, move into the tree. + searchListenerTree(handlers, type, xxTree[branch], i+1); + } else { + isolatedBranch = {}; + isolatedBranch[branch] = xxTree[branch]; + searchListenerTree(handlers, type, { '**': isolatedBranch }, i+1); + } + } + } + } else if(xxTree._listeners) { + // We have reached the end and still on a '**' + searchListenerTree(handlers, type, xxTree, typeLength); + } else if(xxTree['*'] && xxTree['*']._listeners) { + searchListenerTree(handlers, type, xxTree['*'], typeLength); + } + } + + return listeners; + } + + function growListenerTree(type, listener) { + + type = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + + // + // Looks for two consecutive '**', if so, don't add the event at all. + // + for(var i = 0, len = type.length; i+1 < len; i++) { + if(type[i] === '**' && type[i+1] === '**') { + return; + } + } + + var tree = this.listenerTree; + var name = type.shift(); + + while (name) { + + if (!tree[name]) { + tree[name] = {}; + } + + tree = tree[name]; + + if (type.length === 0) { + + if (!tree._listeners) { + tree._listeners = listener; + } + else if(typeof tree._listeners === 'function') { + tree._listeners = [tree._listeners, listener]; + } + else if (isArray(tree._listeners)) { + + tree._listeners.push(listener); + + if (!tree._listeners.warned) { + + var m = defaultMaxListeners; + + if (typeof this._events.maxListeners !== 'undefined') { + m = this._events.maxListeners; + } + + if (m > 0 && tree._listeners.length > m) { + + tree._listeners.warned = true; + console.error('(node) warning: possible EventEmitter memory ' + + 'leak detected. %d listeners added. ' + + 'Use emitter.setMaxListeners() to increase limit.', + tree._listeners.length); + console.trace(); + } + } + } + return true; + } + name = type.shift(); + } + return true; + } + + // By default EventEmitters will print a warning if more than + // 10 listeners are added to it. This is a useful default which + // helps finding memory leaks. + // + // Obviously not all Emitters should be limited to 10. This function allows + // that to be increased. Set to zero for unlimited. + + EventEmitter.prototype.delimiter = '.'; + + EventEmitter.prototype.setMaxListeners = function(n) { + this._events || init.call(this); + this._events.maxListeners = n; + if (!this._conf) this._conf = {}; + this._conf.maxListeners = n; + }; + + EventEmitter.prototype.event = ''; + + EventEmitter.prototype.once = function(event, fn) { + this.many(event, 1, fn); + return this; + }; + + EventEmitter.prototype.many = function(event, ttl, fn) { + var self = this; + + if (typeof fn !== 'function') { + throw new Error('many only accepts instances of Function'); + } + + function listener() { + if (--ttl === 0) { + self.off(event, listener); + } + fn.apply(this, arguments); + } + + listener._origin = fn; + + this.on(event, listener); + + return self; + }; + + EventEmitter.prototype.emit = function() { + + this._events || init.call(this); + + var type = arguments[0]; + + if (type === 'newListener' && !this.newListener) { + if (!this._events.newListener) { return false; } + } + + // Loop through the *_all* functions and invoke them. + if (this._all) { + var l = arguments.length; + var args = new Array(l - 1); + for (var i = 1; i < l; i++) args[i - 1] = arguments[i]; + for (i = 0, l = this._all.length; i < l; i++) { + this.event = type; + this._all[i].apply(this, args); + } + } + + // If there is no 'error' event listener then throw. + if (type === 'error') { + + if (!this._all && + !this._events.error && + !(this.wildcard && this.listenerTree.error)) { + + if (arguments[1] instanceof Error) { + throw arguments[1]; // Unhandled 'error' event + } else { + throw new Error("Uncaught, unspecified 'error' event."); + } + return false; + } + } + + var handler; + + if(this.wildcard) { + handler = []; + var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + searchListenerTree.call(this, handler, ns, this.listenerTree, 0); + } + else { + handler = this._events[type]; + } + + if (typeof handler === 'function') { + this.event = type; + if (arguments.length === 1) { + handler.call(this); + } + else if (arguments.length > 1) + switch (arguments.length) { + case 2: + handler.call(this, arguments[1]); + break; + case 3: + handler.call(this, arguments[1], arguments[2]); + break; + // slower + default: + var l = arguments.length; + var args = new Array(l - 1); + for (var i = 1; i < l; i++) args[i - 1] = arguments[i]; + handler.apply(this, args); + } + return true; + } + else if (handler) { + var l = arguments.length; + var args = new Array(l - 1); + for (var i = 1; i < l; i++) args[i - 1] = arguments[i]; + + var listeners = handler.slice(); + for (var i = 0, l = listeners.length; i < l; i++) { + this.event = type; + listeners[i].apply(this, args); + } + return (listeners.length > 0) || !!this._all; + } + else { + return !!this._all; + } + + }; + + EventEmitter.prototype.on = function(type, listener) { + + if (typeof type === 'function') { + this.onAny(type); + return this; + } + + if (typeof listener !== 'function') { + throw new Error('on only accepts instances of Function'); + } + this._events || init.call(this); + + // To avoid recursion in the case that type == "newListeners"! Before + // adding it to the listeners, first emit "newListeners". + this.emit('newListener', type, listener); + + if(this.wildcard) { + growListenerTree.call(this, type, listener); + return this; + } + + if (!this._events[type]) { + // Optimize the case of one listener. Don't need the extra array object. + this._events[type] = listener; + } + else if(typeof this._events[type] === 'function') { + // Adding the second element, need to change to array. + this._events[type] = [this._events[type], listener]; + } + else if (isArray(this._events[type])) { + // If we've already got an array, just append. + this._events[type].push(listener); + + // Check for listener leak + if (!this._events[type].warned) { + + var m = defaultMaxListeners; + + if (typeof this._events.maxListeners !== 'undefined') { + m = this._events.maxListeners; + } + + if (m > 0 && this._events[type].length > m) { + + this._events[type].warned = true; + console.error('(node) warning: possible EventEmitter memory ' + + 'leak detected. %d listeners added. ' + + 'Use emitter.setMaxListeners() to increase limit.', + this._events[type].length); + console.trace(); + } + } + } + return this; + }; + + EventEmitter.prototype.onAny = function(fn) { + + if (typeof fn !== 'function') { + throw new Error('onAny only accepts instances of Function'); + } + + if(!this._all) { + this._all = []; + } + + // Add the function to the event listener collection. + this._all.push(fn); + return this; + }; + + EventEmitter.prototype.addListener = EventEmitter.prototype.on; + + EventEmitter.prototype.off = function(type, listener) { + if (typeof listener !== 'function') { + throw new Error('removeListener only takes instances of Function'); + } + + var handlers,leafs=[]; + + if(this.wildcard) { + var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + leafs = searchListenerTree.call(this, null, ns, this.listenerTree, 0); + } + else { + // does not use listeners(), so no side effect of creating _events[type] + if (!this._events[type]) return this; + handlers = this._events[type]; + leafs.push({_listeners:handlers}); + } + + for (var iLeaf=0; iLeaf 0) { + fns = this._all; + for(i = 0, l = fns.length; i < l; i++) { + if(fn === fns[i]) { + fns.splice(i, 1); + return this; + } + } + } else { + this._all = []; + } + return this; + }; + + EventEmitter.prototype.removeListener = EventEmitter.prototype.off; + + EventEmitter.prototype.removeAllListeners = function(type) { + if (arguments.length === 0) { + !this._events || init.call(this); + return this; + } + + if(this.wildcard) { + var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice(); + var leafs = searchListenerTree.call(this, null, ns, this.listenerTree, 0); + + for (var iLeaf=0; iLeaf + + + +A Tale Of Three Lists (Thunks) + + + +

A Tale Of Three Lists (Thunks)

+ +
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+ +
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+
+ +
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margin: 0px 30px; + display: inline-block; + position: relative; + width: 400px; + height: 500px; + border: 3px solid #000; + background-color: #f0f0f0; + vertical-align: top; +} + +#feed-1 > .content, +#feed-2 > .content, +#my-feed > .content { + position: relative; + width: 100%; + height: 100%; + overflow-y: scroll; +} + +.item { + display: block; + position: relative; + margin: 10px 0px; + padding: 5px; + width: 100%; + color: #000; + overflow: hidden; + white-space: nowrap; + text-decoration: none; + text-overflow: ellipsis; +} + +.item.floating { + cursor: default; + position: absolute; + transition: left 0.3s ease-out, top 0.3s ease-out; + max-width: 214px; + max-height: 100px; +} + +.item.killed { + text-decoration: line-through; +} + +#feed-1 > .content > .item, +#feed-2 > .content > .item { + max-height: 100px; +} + +#feed-1 > .content > .item:hover, +#feed-2 > .content > .item:hover { + background-color: rgba(0,0,0,0.1); +} + +#my-feed > .content > .item { + cursor: default; + max-height: inherit; + white-space: normal; + overflow: auto; + text-overflow: inherit; +} + +.first-list { + background-color: #ffb8b3; +} + +.second-list { + background-color: #b3caff; +} diff --git a/thunk/ui.js b/thunk/ui.js new file mode 100644 index 0000000..2d8068f --- /dev/null +++ b/thunk/ui.js @@ -0,0 +1,209 @@ +(function UI(global){ + "use strict"; + + var $body, $feed_1, $feed_2, $my_feed, + $feed_1_content, $feed_2_content, + $my_feed_content, + + // thunk(s) + docready; + + // pubsub hub + global.EVT = new EventEmitter2(); + + // run everything! + setup(); + + + // *********************************** + + function setup() { + // thunk for DOM-ready event + docready = makeThunk($(document).ready); + + // wait for DOM-ready + docready(DOMSetup); + + + // *********************************** + + function DOMSetup() { + $body = $(document.body); + + $feed_1 = $("[rel*=js-feed-1]"); + $feed_1_content = $feed_1.children("[rel*=js-content]"); + 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"data-paused": "true" }); + $btn.text("resume"); + } + // paused feed + else { + // resume it + $feed.removeAttr("data-paused"); + $btn.text("pause list"); + } + + // signal status message + EVT.emit("status-" + feed_id,!running); + } + + function insertFeedItem(feedID,itemText) { + var $content; + + // which feed to insert into? + if (feedID == 1) $content = $feed_1_content; + else if (feedID == 2) $content = $feed_2_content; + + var $item = $("") + .addClass("item") + .attr({ href: "#", rel: "js-item" }) + .text(itemText); + + $content.prepend($item); + + var $items = $content.children("[rel*=js-item]"); + if ($items.length > 20) { + $items.last().remove(); + } + } + + function selectItem(evt) { + var $item = $(evt.target); + + noop(evt); + + // item not yet killed? + if (!$item.is(".killed")) { + var $feed = $item.closest("[rel*=js-feed-]"); + var feed_id = Number( $feed.attr("rel").substr(8) ); + + // signal item selection + EVT.emit("item-selection",feed_id,$item.text(),$item); + } + } + + function insertMyFeedItem(feed_id,$item) { + var $floating_item = $item.clone().addClass("floating"); + + if (feed_id == 1) $floating_item.addClass("first-list"); + else if (feed_id == 2) $floating_item.addClass("second-list"); + + var item_dims = $item.offset(); + var item_margin_left = parseInt($item.css("margin-left"),10); + var item_margin_top = parseInt($item.css("margin-top"),10); + + $floating_item.css({ + left: (Math.round(item_dims.left) - item_margin_left) + "px", + top: (Math.round(item_dims.top) - item_margin_top) + "px" + }) + .appendTo($body); + + $item.remove(); + + // wait for the next animation frame (CSS junk) + requestAnimationFrame(afterRAF); + + + // *********************************** + + function afterRAF() { + var my_feed_dims = $my_feed_content.offset(); + + $floating_item.css({ + left: Math.round(my_feed_dims.left) + "px", + top: Math.round(my_feed_dims.top) + "px" + }); + + makeThunk( $floating_item.on.bind($floating_item),"transitionend" ) + ( + // 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