code snippets wiki / refactory.org

A wiki for useful code snippets

Bugs? Suggestions?

38-107-191-111 create/login

[EventDispatcher] singleton - a core-API based Signals and Slots implementation

Your work won't be attributed to you because you aren't logged in. Login using OpenID or an existing username, or create a username (no email required) before posting.

LanguagesComma separated. Like ruby, rails or java, swing

KeywordsComma separated. Like file, network

Mark as stub

SnippetWrap code in [code=language][/code] - Use WikiText markup outside of [code] tags

This **{{[EventTargetProvider]}}** singleton enables and will encourage usage of a pretty lightweighted but still type-safety enforcing implementation of [http://en.wikipedia.org/wiki/Signals_and_slots Signals and Slots], an [http://en.wikipedia.org/wiki/Observer_pattern observer] concept different from [http://en.wikipedia.org/wiki/Publish/subscribe publish-subscribe], and all of it based on this languages core-API.

Registering a native JavaScript object via {{EventTargetProvider}}**{{.register}}** applies kind of an **{{[EventTarget]}}** interface onto this object thus featuring immediately its 4 standard methods **{{[addEventListener]}}** or **{{[on]}}**, **{{[removeEventListener]}}** and **{{[dispatchEvent]}}**. In addition to this there is a newly introduced **{{[hasEventListener]}}** helper method available too.

Attempting to register DOM-**{{[Node]}}** or DOM-**{{[Element]}}** objects as well as reregistering of objects that already do implement the {{[EventTarget]}} interface is futile.

Furthermore, this observer does not support any DOM-level-2 event flow behavior like capture, bubbling, propagation for there are no dependencies like ancestry or tree-like object hierarchies.

Once such an object features {{[EventTarget]}} behavior every other object can subscribe itself or listen via {{[addEventListener]}} or {{[on]}} to a certain event by passing a valid type and a handler to that firstly mentioned object.

[code=javascript]/*
  link-list:

English:

[http://en.wikipedia.org/wiki/Observer_pattern]   - Observer Pattern
      [http://en.wikipedia.org/wiki/Publish/subscribe]  - publish-subscribe
      [http://en.wikipedia.org/wiki/Signals_and_slots]  - Signals and Slots

[http://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113/]
      [http://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113/events.html]
      [http://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113/ecma-script-binding.html]

Deutsch/German:
      [http://de.wikipedia.org/wiki/Observer_(Entwurfsmuster)]  - Observer (Entwurfsmuster) / publish-subscribe
      [http://de.wikipedia.org/wiki/Signal-Slot-Konzept]        - Signal-Slot-Konzept
*/

(function (ns) {

ns = (ns/*[custom_namespace]*/ || this/*[global|scripting_host]*/);
  ns["EventTargetProvider"] = (function () { // [EventTargetProvider] Module/Singleton becomes an implementation either - if provided - of a custom namespace otherwise of the global namespace.

var exposeImplementation = Object.prototype.toString,

Detect = { // typedetection
      isString :(function (regXBaseClass, expose) {
        return (function (obj/*:[object|value]*/) { /*:[true|false]*/

return regXBaseClass.test(expose.call(obj));
        });
      })((/^\[object\s+String\]$/), exposeImplementation),

isFunction : (function (obj/*:[object|value]*/) { /*:[true|false]*/ 
        return ((typeof obj == "function") && (typeof obj.call == "function") && (typeof obj.apply == "function")); // x-frame-safe and also filters e.g. mozillas [[RegExp]] implementation.
      })
    },
    Handler = { // specialized [indexOf] helper method.
      indexOf : (function (arr, fct) { /*:[number(>=0|-1)]*/
        var idx = arr.length;
        while (idx--) {
          if (arr[idx] === fct) {
            break;
          }
        }
        return idx;
      })
    },

Event = (function (target/*:[EventTarget]*/, type/*:[string|String]*/) { // providing the [[Event]] constructor.

this.constructor = Event; // arguments.callee

this.target = target;
      this.type = type;
      this.timeStamp = new Date();
    }),
    EventListener = (function (target/*:[EventTarget]*/, type/*:[string|String]*/, handler/*:[Function]*/) { // providing the [[EventListener]] constructor.

this.constructor = EventListener; // arguments.callee

var defaultEvent = new Event(target, type); // default [Event] object
      this.handleEvent = (function (evt/*:[string|String|Event-like-Object]*/) { /*:void*/

if (evt && (typeof evt == "object")) {
        //stay strictly typesafe - [dispatchEvent] never will take control of [defaultEvent] e.g trying to delegate another [target] by manipulating its event-object-like argument.
          evt.target = defaultEvent.target;
          evt.type = defaultEvent.type;
          evt.timeStamp = defaultEvent.timeStamp;
        } else {
        //create a [defaultEvent] copy.
          evt = {
            target: defaultEvent.target,
            type: defaultEvent.type,
            timeStamp: defaultEvent.timeStamp
          };
        }
        handler(evt);
      });

this.getType = (function () { /*:[string]*/
        return type;
      });
      this.getHandler = (function () { /*:[Function]*/
        return handler;
      });
    }),/*

»The concept of "Mixin"s from the perspective of
     JavaScript adds behavior to objects by delegation
     over implemented interfaces. "Trait"s  might be
     the wording that comes closest to this languages
     design.
     Furthermore, "augment" describes far better the
     mechanism behind this special kind of interface
     inheritance than "mix in" does.«

*/
    EventTarget = (function (indexOf, isString, isFunction) {
      return (function () { // [EventTarget] Mixin: providing the [EventTarget] interface.

//this.constructor = EventTarget; // arguments.callee // this is not a constructor .
        var eventMap = { },
        removeEventListener = (function (type/*:[string|String]*/, handler/*:[Function]*/) { /*:[true|false]*/

var event = eventMap[type], successfully = false;
          if (event) {

var handlers = event.handlers,
            listeners = event.listeners,
            idx = indexOf(handlers, handler);

if (idx >= 0) {
              handlers.splice(idx, 1);
              listeners.splice(idx, 1);
              successfully = true;
            }
          }
          return successfully;
        }),
        hasEventListener = (function (type/*:[string|String]*/, handler/*:[Function]*/) { /*:[true|false]*/
          return ((eventMap[type] || false) && (indexOf(eventMap[type].handlers, handler) >= 0));
        });

this.addEventListener = this.on = (function (type/*:[string|String]*/, handler/*:[Function]*/) { /*:[EventListener|undefined]*/

var reference;
          if (type && isString(type) && isFunction(handler)) {

var event = eventMap[type], listener = new EventListener(this, type, handler);
            if (event) {

var handlers = event.handlers,
              listeners = event.listeners,
              idx = indexOf(handlers, handler);

if (idx == -1) {
                handlers.push(listener.getHandler()); // in order to store a proper handler reference that later on could be compared to.
                listeners.push(listener);

reference = listener;
              } else {
                reference = listeners[idx];
              }
            } else {
              event = eventMap[type] = {};
              event.handlers = [listener.getHandler()]; // in order to store a proper handler reference that later on could be compared to.
              event.listeners = [listener];

reference = listener;
            }
          }
          return reference;
        });
        this.removeEventListener = (function (typeOrListener/*:[string|String|EventListener]*/, handler/*:[Function]*/) { /*:[true|false]*/
          return ((isString(typeOrListener) && isFunction(handler) && removeEventListener(typeOrListener, handler)) || ((typeOrListener instanceof EventListener) && removeEventListener(typeOrListener.getType(), typeOrListener.getHandler())) || false);
        });
        this.hasEventListener = (function (typeOrListener/*:[string|String|EventListener]*/, handler/*:[Function]*/) { /*:[true|false]*/
          return ((isString(typeOrListener) && isFunction(handler) && hasEventListener(typeOrListener, handler)) || ((typeOrListener instanceof EventListener) && hasEventListener(typeOrListener.getType(), typeOrListener.getHandler())) || false/* or might >>return undefined<< be even better? */);
        });
        this.dispatchEvent = (function (evt/*:[string|String|Event-like-Object]*/) { /*:[true|false]*/

var successfully = false,
          type = (((typeof evt == "object") && (typeof evt.type == "string") && evt.type) || ((typeof evt == "string") && evt)),
          event = (type && eventMap[type]);

if (event) {
            var listeners = (event && event.listeners), len = ((listeners && listeners.length) || 0), idx = 0;

if (len >= 1) {
              while (idx < len) {

listeners[idx++].handleEvent(evt); // handle event dispatching serially - recommended if handler-processing is not that time consuming.

//handling event dispatching kind of *green threaded* prevents freezing the user interface if dispatch cycle starts.
              //setTimeout((function () {listeners[idx++].handleEvent(evt);}), 0);        // play around adjusting timeout values.
              //setTimeout((function () {listeners[idx++].handleEvent(evt);}), 1);        // ... "" ...
              //setTimeout((function () {listeners[idx++].handleEvent(evt);}), idx);      // ... "" ...
              //setTimeout((function () {listeners[idx++].handleEvent(evt);}), (idx * 5));// ... "" ...

//alternatively each object that implements the [EventTarget] interface might enclose calling its own [dispatchEvent] method into a timeout if necessary:
              // obj = {};
              // EventTargetProvider.register(obj);
              // var customEventListener = obj.addEventListener("customEvent", (function (evt) {print("onCustomEvent :\nevt : " + ((evt && ((evt.toSource && evt.toSource()) || evt.toString())) || evt) + "\n");}));
              // setTimeout((function () {obj.dispatchEvent("customEvent");}), 1);
              // obj.dispatchEvent("someOtherEvent");
              }
              successfully = true;
            }
          }
          return successfully;
        });
      });
    })(Handler.indexOf, Detect.isString, Detect.isFunction),

target = (function () {var obj = {}; EventTarget.call(obj); return obj;})(), // there will be never ever any [EventTarget] instances.

TARGET = {
      addListenerString : ("" + target.addEventListener),
      removeListenerString : ("" + target.removeEventListener),
      hasListenerString : ("" + target.hasEventListener),
      dispatchEventString : ("" + target.dispatchEvent)
    };
    target = Handler = Detect = exposeImplementation = null;
    delete target; delete Handler; delete Detect; delete exposeImplementation;

/*
    objects need to be registered and/or unsubscribed explicitly in order to
    apply/augment and/or withdraw/remove [EventTarget]-properties to/from them.
  */
    return {
      register: (function (obj/*:[Object]*/) { /*:void*/ // register | sign on

//do not apply this customized [EventTarget] interface to DOM-[Node] or DOM-[Element] objects or to objects that already got augmented by this customized [EventTarget] features.
        if ((typeof obj.addEventListener != "function") && !obj.attachEvent && (typeof obj.removeEventListener != "function") && !obj.detachEvent && (typeof obj.dispatchEvent != "function") && !obj.fireEvent) {

EventTarget.call(obj); // applying the [EventTarget] Mixin - [obj] implements the [EventTarget] interface.
        }
        return obj;
      }),
      unsubscribe: (function (obj/*:[Object]*/) { /*:void*/ // unsubscribe | sign off

if (("" + obj.addEventListener) == TARGET.addListenerString)  {
          delete obj.addEventListener;
        }
        if (("" + obj.removeEventListener) == TARGET.removeListenerString) {
          delete obj.removeEventListener;
        }
        if (("" + obj.hasEventListener) == TARGET.hasListenerString) {
          delete obj.hasEventListener;
        }
        if (("" + obj.dispatchEvent) == TARGET.dispatchEventString) {
          delete obj.dispatchEvent;
        }
      })
    };
  })(); // [EventTargetProvider] Module/Singleton becomes an implementation either - if provided - of a custom namespace otherwise of the global namespace.

ns = null; delete ns;
  delete arguments.callee;
}).call(null/*does force the internal [this] context pointing to the [global] object*/ /*[, optional_namespace_EventTargetProvider_is_supposed_to_be_bound_to]*/);

[http://closure-compiler.appspot.com/home]

- Whitespace only   - 4.071 byte : (additionally featuring [hasEventListener])
(function(ns){(ns||this)["EventTargetProvider"]=function(){var exposeImplementation=Object.prototype.toString,Detect={isString:function(regXBaseClass,expose){return function(obj){return regXBaseClass.test(expose.call(obj))}}(/^\[object\s+String\]$/,exposeImplementation),isFunction:function(obj){return typeof obj=="function"&&typeof obj.call=="function"&&typeof obj.apply=="function"}},Handler={indexOf:function(arr,fct){var idx=arr.length;while(idx--)if(arr[idx]===fct)break;return idx}},Event=function(target,type){this.constructor=Event;this.target=target;this.type=type;this.timeStamp=new Date},EventListener=function(target,type,handler){this.constructor=EventListener;var defaultEvent=new Event(target,type);this.handleEvent=function(evt){if(evt&&typeof evt=="object"){evt.target=defaultEvent.target;evt.type=defaultEvent.type;evt.timeStamp=defaultEvent.timeStamp}else evt={target:defaultEvent.target,type:defaultEvent.type,timeStamp:defaultEvent.timeStamp};handler(evt)};this.getType=function(){return type};this.getHandler=function(){return handler}},EventTarget=function(indexOf,isString,isFunction){return function(){var eventMap={},removeEventListener=function(type,handler){var event=eventMap[type],successfully=false;if(event){var handlers=event.handlers,listeners=event.listeners,idx=indexOf(handlers,handler);if(idx>=0){handlers.splice(idx,1);listeners.splice(idx,1);successfully=true}}return successfully},hasEventListener=function(type,handler){return(eventMap[type]||false)&&indexOf(eventMap[type].handlers,handler)>=0};this.addEventListener=this.on=function(type,handler){var reference;if(type&&isString(type)&&isFunction(handler)){var event=eventMap[type],listener=new EventListener(this,type,handler);if(event){var handlers=event.handlers,listeners=event.listeners,idx=indexOf(handlers,handler);if(idx==-1){handlers.push(listener.getHandler());listeners.push(listener);reference=listener}else reference=listeners[idx]}else{event=eventMap[type]={};event.handlers=[listener.getHandler()];event.listeners=[listener];reference=listener}}return reference};this.removeEventListener=function(typeOrListener,handler){return isString(typeOrListener)&&isFunction(handler)&&removeEventListener(typeOrListener,handler)||typeOrListener instanceof EventListener&&removeEventListener(typeOrListener.getType(),typeOrListener.getHandler())||false};this.hasEventListener=function(typeOrListener,handler){return isString(typeOrListener)&&isFunction(handler)&&hasEventListener(typeOrListener,handler)||typeOrListener instanceof EventListener&&hasEventListener(typeOrListener.getType(),typeOrListener.getHandler())||false};this.dispatchEvent=function(evt){var successfully=false,type=typeof evt=="object"&&typeof evt.type=="string"&&evt.type||typeof evt=="string"&&evt,event=type&&eventMap[type];if(event){var listeners=event&&event.listeners,len=listeners&&listeners.length||0,idx=0;if(len>=1){while(idx<len)listeners[idx++].handleEvent(evt);successfully=true}}return successfully}}}(Handler.indexOf,Detect.isString,Detect.isFunction),target=function(){var obj={};EventTarget.call(obj);return obj}(),TARGET={addListenerString:""+target.addEventListener,removeListenerString:""+target.removeEventListener,hasListenerString:""+target.hasEventListener,dispatchEventString:""+target.dispatchEvent};target=Handler=Detect=exposeImplementation=null;delete target;delete Handler;delete Detect;delete exposeImplementation;return{register:function(obj){if(typeof obj.addEventListener!="function"&&!obj.attachEvent&&typeof obj.removeEventListener!="function"&&!obj.detachEvent&&typeof obj.dispatchEvent!="function"&&!obj.fireEvent)EventTarget.call(obj);return obj},unsubscribe:function(obj){if(""+obj.addEventListener==TARGET.addListenerString)delete obj.addEventListener;if(""+obj.removeEventListener==TARGET.removeListenerString)delete obj.removeEventListener;if(""+obj.hasEventListener==TARGET.hasListenerString)delete obj.hasEventListener;if(""+obj.dispatchEvent==TARGET.dispatchEventString)delete obj.dispatchEvent}}}();ns=null;delete ns;delete arguments.callee}).call(null);

- Whitespace only   - 3.558 byte : (does not include [hasEventListener] functionality)
(function(ns){(ns||this)["EventTargetProvider"]=function(){var exposeImplementation=Object.prototype.toString,Detect={isString:function(regXBaseClass,expose){return function(obj){return regXBaseClass.test(expose.call(obj))}}(/^\[object\s+String\]$/,exposeImplementation),isFunction:function(obj){return typeof obj=="function"&&typeof obj.call=="function"&&typeof obj.apply=="function"}},Handler={indexOf:function(arr,fct){var idx=arr.length;while(idx--)if(arr[idx]===fct)break;return idx}},Event=function(target,type){this.constructor=Event;this.target=target;this.type=type;this.timeStamp=new Date},EventListener=function(target,type,handler){this.constructor=EventListener;var defaultEvent=new Event(target,type);this.handleEvent=function(evt){if(evt&&typeof evt=="object"){evt.target=defaultEvent.target;evt.type=defaultEvent.type;evt.timeStamp=defaultEvent.timeStamp}else evt={target:defaultEvent.target,type:defaultEvent.type,timeStamp:defaultEvent.timeStamp};handler(evt)};this.getType=function(){return type};this.getHandler=function(){return handler}},EventTarget=function(indexOf,isString,isFunction){return function(){var eventMap={},removeEventListener=function(type,handler){var event=eventMap[type],successfully=false;if(event){var handlers=event.handlers,listeners=event.listeners,idx=indexOf(handlers,handler);if(idx>=0){handlers.splice(idx,1);listeners.splice(idx,1);successfully=true}}return successfully};this.addEventListener=this.on=function(type,handler){var reference;if(type&&isString(type)&&isFunction(handler)){var event=eventMap[type],listener=new EventListener(this,type,handler);if(event){var handlers=event.handlers,listeners=event.listeners,idx=indexOf(handlers,handler);if(idx==-1){handlers.push(listener.getHandler());listeners.push(listener);reference=listener}else reference=listeners[idx]}else{event=eventMap[type]={};event.handlers=[listener.getHandler()];event.listeners=[listener];reference=listener}}return reference};this.removeEventListener=function(typeOrListener,handler){return isString(typeOrListener)&&isFunction(handler)&&removeEventListener(typeOrListener,handler)||typeOrListener instanceof EventListener&&removeEventListener(typeOrListener.getType(),typeOrListener.getHandler())||false};this.dispatchEvent=function(evt){var successfully=false,type=typeof evt=="object"&&typeof evt.type=="string"&&evt.type||typeof evt=="string"&&evt,event=type&&eventMap[type];if(event){var listeners=event&&event.listeners,len=listeners&&listeners.length||0,idx=0;if(len>=1){while(idx<len)listeners[idx++].handleEvent(evt);successfully=true}}return successfully}}}(Handler.indexOf,Detect.isString,Detect.isFunction),target=function(){var obj={};EventTarget.call(obj);return obj}(),TARGET={addListenerString:""+target.addEventListener,removeListenerString:""+target.removeEventListener,dispatchEventString:""+target.dispatchEvent};target=Handler=Detect=exposeImplementation=null;delete target;delete Handler;delete Detect;delete exposeImplementation;return{register:function(obj){if(typeof obj.addEventListener!="function"&&!obj.attachEvent&&typeof obj.removeEventListener!="function"&&!obj.detachEvent&&typeof obj.dispatchEvent!="function"&&!obj.fireEvent)EventTarget.call(obj);return obj},unsubscribe:function(obj){if(""+obj.addEventListener==TARGET.addListenerString)delete obj.addEventListener;if(""+obj.removeEventListener==TARGET.removeListenerString)delete obj.removeEventListener;if(""+obj.dispatchEvent==TARGET.dispatchEventString)delete obj.dispatchEvent}}}();ns=null;delete ns;delete arguments.callee}).call(null);

- Simple            - 2.633 byte : (additionally featuring [hasEventListener])
(function(m){(m||this).EventTargetProvider=function(){var q=Object.prototype.toString,n={isString:function(a,g){return function(h){return a.test(g.call(h))}}(/^\[object\s+String\]$/,q),isFunction:function(a){return typeof a=="function"&&typeof a.call=="function"&&typeof a.apply=="function"}},r={indexOf:function(a,g){for(var h=a.length;h--;)if(a[h]===g)break;return h}},s=function(a,g){this.constructor=s;this.target=a;this.type=g;this.timeStamp=new Date},o=function(a,g,h){this.constructor=o;var f=new s(a,g);this.handleEvent=function(i){if(i&&typeof i=="object"){i.target=f.target;i.type=f.type;i.timeStamp=f.timeStamp}else i={target:f.target,type:f.type,timeStamp:f.timeStamp};h(i)};this.getType=function(){return g};this.getHandler=function(){return h}},u=function(a,g,h){return function(){var f={},i=function(b,d){var c=f[b],e=false;if(c){var j=c.handlers;c=c.listeners;var k=a(j,d);if(k>=0){j.splice(k,1);c.splice(k,1);e=true}}return e},t=function(b,d){return(f[b]||false)&&a(f[b].handlers,d)>=0};this.addEventListener=this.on=function(b,d){var c;if(b&&g(b)&&h(d)){var e=f[b];c=new o(this,b,d);if(e){var j=e.handlers;e=e.listeners;var k=a(j,d);if(k==-1){j.push(c.getHandler());e.push(c);c=c}else c=e[k]}else{e=f[b]={};e.handlers=[c.getHandler()];e.listeners=[c];c=c}}return c};this.removeEventListener=function(b,d){return g(b)&&h(d)&&i(b,d)||b instanceof o&&i(b.getType(),b.getHandler())||false};this.hasEventListener=function(b,d){return g(b)&&h(d)&&t(b,d)||b instanceof o&&t(b.getType(),b.getHandler())||false};this.dispatchEvent=function(b){var d=false,c=typeof b=="object"&&typeof b.type=="string"&&b.type||typeof b=="string"&&b;if(c=c&&f[c]){var e=(c=c&&c.listeners)&&c.length||0,j=0;if(e>=1){for(;j<e;)c[j++].handleEvent(b);d=true}}return d}}}(r.indexOf,n.isString,n.isFunction),l=function(){var a={};u.call(a);return a}(),p={addListenerString:""+l.addEventListener,removeListenerString:""+l.removeEventListener,hasListenerString:""+l.hasEventListener,dispatchEventString:""+l.dispatchEvent};l=r=n=q=null;delete l;delete r;delete n;delete q;return{register:function(a){typeof a.addEventListener!="function"&&!a.attachEvent&&typeof a.removeEventListener!="function"&&!a.detachEvent&&typeof a.dispatchEvent!="function"&&!a.fireEvent&&u.call(a);return a},unsubscribe:function(a){""+a.addEventListener==p.addListenerString&&delete a.addEventListener;""+a.removeEventListener==p.removeListenerString&&delete a.removeEventListener;""+a.hasEventListener==p.hasListenerString&&delete a.hasEventListener;""+a.dispatchEvent==p.dispatchEventString&&delete a.dispatchEvent}}}();m=null;delete m;delete arguments.callee}).call(null);

- Simple            - 2.346 byte : (does not include [hasEventListener] functionality)
(function(l){(l||this).EventTargetProvider=function(){var o=Object.prototype.toString,n={isString:function(a,e){return function(f){return a.test(e.call(f))}}(/^\[object\s+String\]$/,o),isFunction:function(a){return typeof a=="function"&&typeof a.call=="function"&&typeof a.apply=="function"}},p={indexOf:function(a,e){for(var f=a.length;f--;)if(a[f]===e)break;return f}},s=function(a,e){this.constructor=s;this.target=a;this.type=e;this.timeStamp=new Date},q=function(a,e,f){this.constructor=q;var g=new s(a,e);this.handleEvent=function(i){if(i&&typeof i=="object"){i.target=g.target;i.type=g.type;i.timeStamp=g.timeStamp}else i={target:g.target,type:g.type,timeStamp:g.timeStamp};f(i)};this.getType=function(){return e};this.getHandler=function(){return f}},t=function(a,e,f){return function(){var g={},i=function(c,h){var b=g[c],d=false;if(b){var j=b.handlers;b=b.listeners;var k=a(j,h);if(k>=0){j.splice(k,1);b.splice(k,1);d=true}}return d};this.addEventListener=this.on=function(c,h){var b;if(c&&e(c)&&f(h)){var d=g[c];b=new q(this,c,h);if(d){var j=d.handlers;d=d.listeners;var k=a(j,h);if(k==-1){j.push(b.getHandler());d.push(b);b=b}else b=d[k]}else{d=g[c]={};d.handlers=[b.getHandler()];d.listeners=[b];b=b}}return b};this.removeEventListener=function(c,h){return e(c)&&f(h)&&i(c,h)||c instanceof q&&i(c.getType(),c.getHandler())||false};this.dispatchEvent=function(c){var h=false,b=typeof c=="object"&&typeof c.type=="string"&&c.type||typeof c=="string"&&c;if(b=b&&g[b]){var d=(b=b&&b.listeners)&&b.length||0,j=0;if(d>=1){for(;j<d;)b[j++].handleEvent(c);h=true}}return h}}}(p.indexOf,n.isString,n.isFunction),m=function(){var a={};t.call(a);return a}(),r={addListenerString:""+m.addEventListener,removeListenerString:""+m.removeEventListener,dispatchEventString:""+m.dispatchEvent};m=p=n=o=null;delete m;delete p;delete n;delete o;return{register:function(a){typeof a.addEventListener!="function"&&!a.attachEvent&&typeof a.removeEventListener!="function"&&!a.detachEvent&&typeof a.dispatchEvent!="function"&&!a.fireEvent&&t.call(a);return a},unsubscribe:function(a){""+a.addEventListener==r.addListenerString&&delete a.addEventListener;""+a.removeEventListener==r.removeListenerString&&delete a.removeEventListener;""+a.dispatchEvent==r.dispatchEventString&&delete a.dispatchEvent}}}();l=null;delete l;delete arguments.callee}).call(null);

*/ /*

[closure-compiler(Simple) + edwards-packer(encoded)]

- combined                    - 2.131 byte : (additionally featuring [hasEventListener]);
eval(function(p,a,c,k,e,r){e=function(c){return(c<a?'':e(parseInt(c/a)))+((c=c%a)>35?String.fromCharCode(c+29):c.toString(36))};if(!''.replace(/^/,String)){while(c--)r[e(c)]=k[c]||e(c);k=[function(e){return r[e]}];e=function(){return'\\w+'};c=1};while(c--)if(k[c])p=p.replace(new RegExp('\\b'+e(c)+'\\b','g'),k[c]);return p}('(2(m){(m||4).11=2(){5 q=19.18.14,n={Z:2(a,g){3 2(h){3 a.1e(g.z(h))}}(/^\\[H\\s+13\\]$/,q),U:2(a){3 6 a=="2"&&6 a.z=="2"&&6 a.1f=="2"}},r={10:2(a,g){L(5 h=a.N;h--;)8(a[h]===g)12;3 h}},s=2(a,g){4.R=s;4.y=a;4.9=g;4.A=J 1g},o=2(a,g,h){4.R=o;5 f=J s(a,g);4.M=2(i){8(i&&6 i=="H"){i.y=f.y;i.9=f.9;i.A=f.A}G i={y:f.y,9:f.9,A:f.A};h(i)};4.K=2(){3 g};4.x=2(){3 h}},u=2(a,g,h){3 2(){5 f={},i=2(b,d){5 c=f[b],e=C;8(c){5 j=c.E;c=c.F;5 k=a(j,d);8(k>=0){j.Q(k,1);c.Q(k,1);e=S}}3 e},t=2(b,d){3(f[b]||C)&&a(f[b].E,d)>=0};4.w=4.1h=2(b,d){5 c;8(b&&g(b)&&h(d)){5 e=f[b];c=J o(4,b,d);8(e){5 j=e.E;e=e.F;5 k=a(j,d);8(k==-1){j.W(c.x());e.W(c);c=c}G c=e[k]}G{e=f[b]={};e.E=[c.x()];e.F=[c];c=c}}3 c};4.B=2(b,d){3 g(b)&&h(d)&&i(b,d)||b Y o&&i(b.K(),b.x())||C};4.D=2(b,d){3 g(b)&&h(d)&&t(b,d)||b Y o&&t(b.K(),b.x())||C};4.v=2(b){5 d=C,c=6 b=="H"&&6 b.9=="V"&&b.9||6 b=="V"&&b;8(c=c&&f[c]){5 e=(c=c&&c.F)&&c.N||0,j=0;8(e>=1){L(;j<e;)c[j++].M(b);d=S}}3 d}}}(r.10,n.Z,n.U),l=2(){5 a={};u.z(a);3 a}(),p={P:""+l.w,X:""+l.B,T:""+l.D,O:""+l.v};l=r=n=q=I;7 l;7 r;7 n;7 q;3{1d:2(a){6 a.w!="2"&&!a.15&&6 a.B!="2"&&!a.1c&&6 a.v!="2"&&!a.16&&u.z(a);3 a},1b:2(a){""+a.w==p.P&&7 a.w;""+a.B==p.X&&7 a.B;""+a.D==p.T&&7 a.D;""+a.v==p.O&&7 a.v}}}();m=I;7 m;7 17.1a}).z(I);',62,80,'||function|return|this|var|typeof|delete|if|type||||||||||||||||||||||dispatchEvent|addEventListener|getHandler|target|call|timeStamp|removeEventListener|false|hasEventListener|handlers|listeners|else|object|null|new|getType|for|handleEvent|length|dispatchEventString|addListenerString|splice|constructor|true|hasListenerString|isFunction|string|push|removeListenerString|instanceof|isString|indexOf|EventTargetProvider|break|String|toString|attachEvent|fireEvent|arguments|prototype|Object|callee|unsubscribe|detachEvent|register|test|apply|Date|on'.split('|'),0,{}));

- combined                    - 1.967 byte : (does not include [hasEventListener] functionality)
eval(function(p,a,c,k,e,r){e=function(c){return(c<a?'':e(parseInt(c/a)))+((c=c%a)>35?String.fromCharCode(c+29):c.toString(36))};if(!''.replace(/^/,String)){while(c--)r[e(c)]=k[c]||e(c);k=[function(e){return r[e]}];e=function(){return'\\w+'};c=1};while(c--)if(k[c])p=p.replace(new RegExp('\\b'+e(c)+'\\b','g'),k[c]);return p}('(2(l){(l||5).16=2(){3 o=1d.13.12,n={P:2(a,e){4 2(f){4 a.11(e.x(f))}}(/^\\[H\\s+Z\\]$/,o),U:2(a){4 6 a=="2"&&6 a.x=="2"&&6 a.14=="2"}},p={W:2(a,e){O(3 f=a.M;f--;)7(a[f]===e)10;4 f}},s=2(a,e){5.J=s;5.y=a;5.9=e;5.z=F 1e},q=2(a,e,f){5.J=q;3 g=F s(a,e);5.L=2(i){7(i&&6 i=="H"){i.y=g.y;i.9=g.9;i.z=g.z}G i={y:g.y,9:g.9,z:g.z};f(i)};5.V=2(){4 e};5.A=2(){4 f}},t=2(a,e,f){4 2(){3 g={},i=2(c,h){3 b=g[c],d=C;7(b){3 j=b.D;b=b.B;3 k=a(j,h);7(k>=0){j.T(k,1);b.T(k,1);d=I}}4 d};5.w=5.15=2(c,h){3 b;7(c&&e(c)&&f(h)){3 d=g[c];b=F q(5,c,h);7(d){3 j=d.D;d=d.B;3 k=a(j,h);7(k==-1){j.K(b.A());d.K(b);b=b}G b=d[k]}G{d=g[c]={};d.D=[b.A()];d.B=[b];b=b}}4 b};5.v=2(c,h){4 e(c)&&f(h)&&i(c,h)||c X q&&i(c.V(),c.A())||C};5.u=2(c){3 h=C,b=6 c=="H"&&6 c.9=="N"&&c.9||6 c=="N"&&c;7(b=b&&g[b]){3 d=(b=b&&b.B)&&b.M||0,j=0;7(d>=1){O(;j<d;)b[j++].L(c);h=I}}4 h}}}(p.W,n.P,n.U),m=2(){3 a={};t.x(a);4 a}(),r={Q:""+m.w,R:""+m.v,S:""+m.u};m=p=n=o=E;8 m;8 p;8 n;8 o;4{17:2(a){6 a.w!="2"&&!a.18&&6 a.v!="2"&&!a.19&&6 a.u!="2"&&!a.1a&&t.x(a);4 a},1b:2(a){""+a.w==r.Q&&8 a.w;""+a.v==r.R&&8 a.v;""+a.u==r.S&&8 a.u}}}();l=E;8 l;8 1c.Y}).x(E);',62,77,'||function|var|return|this|typeof|if|delete|type|||||||||||||||||||||dispatchEvent|removeEventListener|addEventListener|call|target|timeStamp|getHandler|listeners|false|handlers|null|new|else|object|true|constructor|push|handleEvent|length|string|for|isString|addListenerString|removeListenerString|dispatchEventString|splice|isFunction|getType|indexOf|instanceof|callee|String|break|test|toString|prototype|apply|on|EventTargetProvider|register|attachEvent|detachEvent|fireEvent|unsubscribe|arguments|Object|Date'.split('|'),0,{}));

*/[/code]

Log message

Human?

public snippets

This is a community-maintained collection of reusable code snippets. Contribute something without logging in, or improve existing contributions. All code is dedicated to the public domain unless otherwise specified.

All user-contributed content is dedicated to the public domain unless otherwise specified.

Refactory.org, its owners and contributers shall not be held liable for any damages resulting from your usage of any content herein. Your usage of this website constitutes agreement to these terms.

Created by Aaron Hall - email / twitter