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Feature | Enabled listener intercption for document and window #3

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Feature | Enabled listener intercption for document and window #3

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163 changes: 79 additions & 84 deletions src/getEventListeners.js
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Original file line number Diff line number Diff line change
@@ -1,86 +1,81 @@
(function() {
'use strict';

(function () {
"use strict";
// save the original methods before overwriting them
Element.prototype._addEventListener = Element.prototype.addEventListener;
Element.prototype._removeEventListener = Element.prototype.removeEventListener;

/**
* [addEventListener description]
* @param {[type]} type [description]
* @param {[type]} listener [description]
* @param {Boolean} useCapture [description]
*/
Element.prototype.addEventListener = function(type,listener,useCapture=false) {
// declare listener
this._addEventListener(type,listener,useCapture);

if(!this.eventListenerList) this.eventListenerList = {};
if(!this.eventListenerList[type]) this.eventListenerList[type] = [];

// add listener to event tracking list
this.eventListenerList[type].push( {type, listener, useCapture} );
};

/**
* [removeEventListener description]
* @param {[type]} type [description]
* @param {[type]} listener [description]
* @param {Boolean} useCapture [description]
* @return {[type]} [description]
*/
Element.prototype.removeEventListener = function(type,listener,useCapture=false) {
// remove listener
this._removeEventListener(type,listener,useCapture);

if(!this.eventListenerList) this.eventListenerList = {};
if(!this.eventListenerList[type]) this.eventListenerList[type] = [];

// Find the event in the list, If a listener is registered twice, one
// with capture and one without, remove each one separately. Removal of
// a capturing listener does not affect a non-capturing version of the
// same listener, and vice versa.
for(let i=0; i<this.eventListenerList[type].length; i++){
if( this.eventListenerList[type][i].listener===listener && this.eventListenerList[type][i].useCapture===useCapture){
this.eventListenerList[type].splice(i, 1);
break;
[Document, Window, Element].forEach((cst) => {
if (typeof cst === "function") {
cst.prototype._addEventListener = cst.prototype.addEventListener;
cst.prototype._removeEventListener = cst.prototype.removeEventListener;

/**
* [addEventListener description]
* @param {[type]} type [description]
* @param {[type]} listener [description]
* @param {Boolean} useCapture [description]
*/
cst.prototype.addEventListener = function (
type,
listener,
useCapture = false
) {
// declare listener
this._addEventListener(type, listener, useCapture);

if (!this.eventListenerList) this.eventListenerList = {};
if (!this.eventListenerList[type]) this.eventListenerList[type] = [];

// add listener to event tracking list
this.eventListenerList[type].push({ type, listener, useCapture });
};

/**
* [removeEventListener description]
* @param {[type]} type [description]
* @param {[type]} listener [description]
* @param {Boolean} useCapture [description]
* @return {[type]} [description]
*/
cst.prototype.removeEventListener = function (
type,
listener,
useCapture = false
) {
// remove listener
this._removeEventListener(type, listener, useCapture);

if (!this.eventListenerList) this.eventListenerList = {};
if (!this.eventListenerList[type]) this.eventListenerList[type] = [];

// Find the event in the list, If a listener is registered twice, one
// with capture and one without, remove each one separately. Removal of
// a capturing listener does not affect a non-capturing version of the
// same listener, and vice versa.
for (let i = 0; i < this.eventListenerList[type].length; i++) {
if (
this.eventListenerList[type][i].listener === listener &&
this.eventListenerList[type][i].useCapture === useCapture
) {
this.eventListenerList[type].splice(i, 1);
break;
}
}
// if no more events of the removed event type are left,remove the group
if(this.eventListenerList[type].length==0) delete this.eventListenerList[type];
};


/**
* [getEventListeners description]
* @param {[type]} type [description]
* @return {[type]} [description]
*/
Element.prototype.getEventListeners = function(type){
if(!this.eventListenerList) this.eventListenerList = {};

// return reqested listeners type or all them
if(type===undefined) return this.eventListenerList;
return this.eventListenerList[type];
};


/*
Element.prototype.clearEventListeners = function(a){
if(!this.eventListenerList)
this.eventListenerList = {};
if(a==undefined){
for(var x in (this.getEventListeners())) this.clearEventListeners(x);
return;
}
var el = this.getEventListeners(a);
if(el==undefined)
return;
for(var i = el.length - 1; i >= 0; --i) {
var ev = el[i];
this.removeEventListener(a, ev.listener, ev.useCapture);
}
};
*/

})();
}
// if no more events of the removed event type are left,remove the group
if (this.eventListenerList[type].length == 0)
delete this.eventListenerList[type];
};

/**
* [getEventListeners description]
* @param {[type]} type [description]
* @return {[type]} [description]
*/
cst.prototype.getEventListeners = function (type) {
if (!this.eventListenerList) this.eventListenerList = {};

// return reqested listeners type or all them
if (type === undefined) return this.eventListenerList;
return this.eventListenerList[type];
};
}
});
})();