50 lines
1.7 KiB
JavaScript
50 lines
1.7 KiB
JavaScript
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// handler-utils.js See license.txt for terms of usage and credits
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"use strict";
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/**
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* Handlers - content handlers manager...
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* ----------------------------------------
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* @bYO!
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*/
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function Handlers(TRACE){
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var _handlers = [], _mapRemoved = new Map();
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return {
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unload: function unload(){
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for (var win of _mapRemoved.keys()) {
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win.removeEventListener("unload", onUnload, false);
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TRACE("Handlers.unload - remove wnd loc: %s")(win.location);
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};
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_handlers = [];
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_mapRemoved = new Map();
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},
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add: function add(handler) { _handlers.push(handler); },
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remove: function remove(win, handler) {
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if (!_mapRemoved.has(win)){
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win.addEventListener("unload", onUnload, false);
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_mapRemoved.set(win, []);
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}
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_mapRemoved.get(win).push(handler);
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TRACE("Handlers.remove - handler: %s")(handler.name);
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},
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apply: function apply(element){
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var removed = _mapRemoved.get(element.ownerDocument.defaultView);
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for (var handler, i = 0; i < _handlers.length; i++)
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if ((handler = _handlers[i]) && (!removed || removed.indexOf(handler) == -1))
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try {
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if (handler(element)) break;
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} catch (e) { TRACE("!!!!!!!!! handler: %s Exception: %s !!!!!!!!!")(handler.name, e); };
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},
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get length() { return _handlers.length; }
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};
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function onUnload(e){
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var win = e.target.defaultView;
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TRACE("Handlers.onUnload - remove wnd has: %s loc: %s")(_mapRemoved.has(win), win.location);
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_mapRemoved.delete(win);
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}
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};
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