betajs-browser
Version:
BetaJS-Browser is a client-side JavaScript framework for Browser-specific methods.
73 lines (65 loc) • 2.73 kB
JavaScript
Scoped.define("module:Events", [
"base:Class",
"base:Objs",
"base:Functions",
"module:Dom"
], function(Class, Objs, Functions, Dom, scoped) {
return Class.extend({
scoped: scoped
}, function(inherited) {
return {
constructor: function() {
inherited.constructor.call(this);
this.__callbacks = {};
},
destroy: function() {
this.clear();
inherited.destroy.call(this);
},
on: function(element, events, callback, context, options) {
events.split(" ").forEach(function(event) {
if (!event)
return;
var callback_function = Functions.as_method(callback, context || element);
element.addEventListener(event, callback_function, options && Dom.passiveEventsSupported() ? options : false);
this.__callbacks[event] = this.__callbacks[event] || [];
this.__callbacks[event].push({
element: element,
callback_function: callback_function,
callback: callback,
context: context
});
}, this);
return this;
},
off: function(element, events, callback, context) {
events.split(" ").forEach(function(event) {
if (!event)
return;
var entries = this.__callbacks[event];
if (entries) {
var i = 0;
while (i < entries.length) {
var entry = entries[i];
if ((!element || element === entry.element) && (!callback || callback === entry.callback) && (!context || context === entry.context)) {
entry.element.removeEventListener(event, entry.callback_function, false);
entries[i] = entries[entries.length - 1];
entries.pop();
} else
++i;
}
}
}, this);
return this;
},
clear: function() {
Objs.iter(this.__callbacks, function(entries, event) {
entries.forEach(function(entry) {
entry.element.removeEventListener(event, entry.callback_function, false);
});
});
this.__callbacks = {};
}
};
});
});