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https://github.com/gorhill/uBlock.git
synced 2024-09-04 10:09:38 +02:00
auto cleanup of listeners
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dff1506d85
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@ -20,7 +20,6 @@
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*/
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/* exported uDom */
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'use strict';
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/******************************************************************************/
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@ -32,6 +31,8 @@
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var uDom = (function() {
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'use strict';
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/******************************************************************************/
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var DOMList = function() {
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@ -639,6 +640,24 @@ DOMList.prototype.toggleClasses = function(classNames, targetState) {
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/******************************************************************************/
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var listenerEntries = [];
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var ListenerEntry = function(target, type, capture, callback) {
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this.target = target;
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this.type = type;
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this.capture = capture;
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this.callback = callback;
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target.addEventListener(type, callback, capture);
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};
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ListenerEntry.prototype.dispose = function() {
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this.target.removeEventListener(this.type, this.callback, this.capture);
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this.target = null;
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this.callback = null;
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};
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/******************************************************************************/
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var makeEventHandler = function(selector, callback) {
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return function(event) {
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var dispatcher = event.currentTarget;
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@ -662,7 +681,7 @@ DOMList.prototype.on = function(etype, selector, callback) {
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var i = this.nodes.length;
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while ( i-- ) {
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this.nodes[i].addEventListener(etype, callback, selector !== undefined);
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listenerEntries.push(new ListenerEntry(this.nodes[i], etype, selector !== undefined, callback));
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}
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return this;
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};
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@ -693,6 +712,20 @@ DOMList.prototype.trigger = function(etype) {
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/******************************************************************************/
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// Cleanup
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var onBeforeUnload = function() {
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var entry;
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while ( entry = listenerEntries.pop() ) {
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entry.dispose();
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}
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window.removeEventListener('beforeunload', onBeforeUnload);
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};
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window.addEventListener('beforeunload', onBeforeUnload);
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/******************************************************************************/
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return DOMListFactory;
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})();
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