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// Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. // ┌────────────────────────────────────────────────────────────┐ \\ // │ Eve 0.5.0 - JavaScript Events Library │ \\ // ├────────────────────────────────────────────────────────────┤ \\ // │ Author Dmitry Baranovskiy (http://dmitry.baranovskiy.com/) │ \\ // └────────────────────────────────────────────────────────────┘ \\ (function (glob) { var version = "0.5.0", has = "hasOwnProperty", separator = /[\.\/]/, comaseparator = /\s*,\s*/, wildcard = "*", fun = function () {}, numsort = function (a, b) { return a - b; }, current_event, stop, events = {n: {}}, firstDefined = function () { for (var i = 0, ii = this.length; i < ii; i++) { if (typeof this[i] != "undefined") { return this[i]; } } }, lastDefined = function () { var i = this.length; while (--i) { if (typeof this[i] != "undefined") { return this[i]; } } }, objtos = Object.prototype.toString, Str = String, isArray = Array.isArray || function (ar) { return ar instanceof Array || objtos.call(ar) == "[object Array]"; }; /*\ * eve [ method ] * Fires event with given `name`, given scope and other parameters. > Arguments - name (string) name of the *event*, dot (`.`) or slash (`/`) separated - scope (object) context for the event handlers - varargs (...) the rest of arguments will be sent to event handlers = (object) array of returned values from the listeners. Array has two methods `.firstDefined()` and `.lastDefined()` to get first or last not `undefined` value. \*/ eve = function (name, scope) { var e = events, oldstop = stop, args = Array.prototype.slice.call(arguments, 2), listeners = eve.listeners(name), z = 0, f = false, l, indexed = [], queue = {}, out = [], ce = current_event, errors = []; out.firstDefined = firstDefined; out.lastDefined = lastDefined; current_event = name; stop = 0; for (var i = 0, ii = listeners.length; i < ii; i++) if ("zIndex" in listeners[i]) { indexed.push(listeners[i].zIndex); if (listeners[i].zIndex < 0) { queue[listeners[i].zIndex] = listeners[i]; } } indexed.sort(numsort); while (indexed[z] < 0) { l = queue[indexed[z++]]; out.push(l.apply(scope, args)); if (stop) { stop = oldstop; return out; } } for (i = 0; i < ii; i++) { l = listeners[i]; if ("zIndex" in l) { if (l.zIndex == indexed[z]) { out.push(l.apply(scope, args)); if (stop) { break; } do { z++; l = queue[indexed[z]]; l && out.push(l.apply(scope, args)); if (stop) { break; } } while (l) } else { queue[l.zIndex] = l; } } else { out.push(l.apply(scope, args)); if (stop) { break; } } } stop = oldstop; current_event = ce; return out; }; // Undocumented. Debug only. eve._events = events; /*\ * eve.listeners [ method ] * Internal method which gives you array of all event handlers that will be triggered by the given `name`. > Arguments - name (string) name of the event, dot (`.`) or slash (`/`) separated = (array) array of event handlers \*/ eve.listeners = function (name) { var names = isArray(name) ? name : name.split(separator), e = events, item, items, k, i, ii, j, jj, nes, es = [e], out = []; for (i = 0, ii = names.length; i < ii; i++) { nes = []; for (j = 0, jj = es.length; j < jj; j++) { e = es[j].n; items = [e[names[i]], e[wildcard]]; k = 2; while (k--) { item = items[k]; if (item) { nes.push(item); out = out.concat(item.f || []); } } } es = nes; } return out; }; /*\ * eve.separator [ method ] * If for some reasons you don’t like default separators (`.` or `/`) you can specify yours * here. Be aware that if you pass a string longer than one character it will be treated as * a list of characters. - separator (string) new separator. Empty string resets to default: `.` or `/`. \*/ eve.separator = function (sep) { if (sep) { sep = Str(sep).replace(/(?=[\.\^\]\[\-])/g, "\\"); sep = "[" + sep + "]"; separator = new RegExp(sep); } else { separator = /[\.\/]/; } }; /*\ * eve.on [ method ] ** * Binds given event handler with a given name. You can use wildcards “`*`” for the names: | eve.on("*.under.*", f); | eve("mouse.under.floor"); // triggers f * Use @eve to trigger the listener. ** - name (string) name of the event, dot (`.`) or slash (`/`) separated, with optional wildcards - f (function) event handler function ** - name (array) if you don’t want to use separators, you can use array of strings - f (function) event handler function ** = (function) returned function accepts a single numeric parameter that represents z-index of the handler. It is an optional feature and only used when you need to ensure that some subset of handlers will be invoked in a given order, despite of the order of assignment. > Example: | eve.on("mouse", eatIt)(2); | eve.on("mouse", scream); | eve.on("mouse", catchIt)(1); * This will ensure that `catchIt` function will be called before `eatIt`. * * If you want to put your handler before non-indexed handlers, specify a negative value. * Note: I assume most of the time you don’t need to worry about z-index, but it’s nice to have this feature “just in case”. \*/ eve.on = function (name, f) { if (typeof f != "function") { return function () {}; } var names = isArray(name) ? (isArray(name[0]) ? name : [name]) : Str(name).split(comaseparator); for (var i = 0, ii = names.length; i < ii; i++) { (function (name) { var names = isArray(name) ? name : Str(name).split(separator), e = events, exist; for (var i = 0, ii = names.length; i < ii; i++) { e = e.n; e = e.hasOwnProperty(names[i]) && e[names[i]] || (e[names[i]] = {n: {}}); } e.f = e.f || []; for (i = 0, ii = e.f.length; i < ii; i++) if (e.f[i] == f) { exist = true; break; } !exist && e.f.push(f); }(names[i])); } return function (zIndex) { if (+zIndex == +zIndex) { f.zIndex = +zIndex; } }; }; /*\ * eve.f [ method ] ** * Returns function that will fire given event with optional arguments. * Arguments that will be passed to the result function will be also * concated to the list of final arguments. | el.onclick = eve.f("click", 1, 2); | eve.on("click", function (a, b, c) { | console.log(a, b, c); // 1, 2, [event object] | }); > Arguments - event (string) event name - varargs (…) and any other arguments = (function) possible event handler function \*/ eve.f = function (event) { var attrs = [].slice.call(arguments, 1); return function () { eve.apply(null, [event, null].concat(attrs).concat([].slice.call(arguments, 0))); }; }; /*\ * eve.stop [ method ] ** * Is used inside an event handler to stop the event, preventing any subsequent listeners from firing. \*/ eve.stop = function () { stop = 1; }; /*\ * eve.nt [ method ] ** * Could be used inside event handler to figure out actual name of the event. ** > Arguments ** - subname (string) #optional subname of the event ** = (string) name of the event, if `subname` is not specified * or = (boolean) `true`, if current event’s name contains `subname` \*/ eve.nt = function (subname) { var cur = isArray(current_event) ? current_event.join(".") : current_event; if (subname) { return new RegExp("(?:\\.|\\/|^)" + subname + "(?:\\.|\\/|$)").test(cur); } return cur; }; /*\ * eve.nts [ method ] ** * Could be used inside event handler to figure out actual name of the event. ** ** = (array) names of the event \*/ eve.nts = function () { return isArray(current_event) ? current_event : current_event.split(separator); }; /*\ * eve.off [ method ] ** * Removes given function from the list of event listeners assigned to given name. * If no arguments specified all the events will be cleared. ** > Arguments ** - name (string) name of the event, dot (`.`) or slash (`/`) separated, with optional wildcards - f (function) event handler function \*/ /*\ * eve.unbind [ method ] ** * See @eve.off \*/ eve.off = eve.unbind = function (name, f) { if (!name) { eve._events = events = {n: {}}; return; } var names = isArray(name) ? (isArray(name[0]) ? name : [name]) : Str(name).split(comaseparator); if (names.length > 1) { for (var i = 0, ii = names.length; i < ii; i++) { eve.off(names[i], f); } return; } names = isArray(name) ? name : Str(name).split(separator); var e, key, splice, i, ii, j, jj, cur = [events]; for (i = 0, ii = names.length; i < ii; i++) { for (j = 0; j < cur.length; j += splice.length - 2) { splice = [j, 1]; e = cur[j].n; if (names[i] != wildcard) { if (e[names[i]]) { splice.push(e[names[i]]); } } else { for (key in e) if (e[has](key)) { splice.push(e[key]); } } cur.splice.apply(cur, splice); } } for (i = 0, ii = cur.length; i < ii; i++) { e = cur[i]; while (e.n) { if (f) { if (e.f) { for (j = 0, jj = e.f.length; j < jj; j++) if (e.f[j] == f) { e.f.splice(j, 1); break; } !e.f.length && delete e.f; } for (key in e.n) if (e.n[has](key) && e.n[key].f) { var funcs = e.n[key].f; for (j = 0, jj = funcs.length; j < jj; j++) if (funcs[j] == f) { funcs.splice(j, 1); break; } !funcs.length && delete e.n[key].f; } } else { delete e.f; for (key in e.n) if (e.n[has](key) && e.n[key].f) { delete e.n[key].f; } } e = e.n; } } }; /*\ * eve.once [ method ] ** * Binds given event handler with a given name to only run once then unbind itself. | eve.once("login", f); | eve("login"); // triggers f | eve("login"); // no listeners * Use @eve to trigger the listener. ** > Arguments ** - name (string) name of the event, dot (`.`) or slash (`/`) separated, with optional wildcards - f (function) event handler function ** = (function) same return function as @eve.on \*/ eve.once = function (name, f) { var f2 = function () { eve.off(name, f2); return f.apply(this, arguments); }; return eve.on(name, f2); }; /*\ * eve.version [ property (string) ] ** * Current version of the library. \*/ eve.version = version; eve.toString = function () { return "You are running Eve " + version; }; (typeof module != "undefined" && module.exports) ? (module.exports = eve) : (typeof define === "function" && define.amd ? (define("eve", [], function() { return eve; })) : (glob.eve = eve)); })(this);