/** * History * * @version 1.0 * * @license MIT License * @author Harald Kirschner * @copyright 2008 Author */ var History = $extend(history, { implement: function(obj) { return $extend(this, obj); } }); History.implement(new Events($empty)); History.implement({ staate: null, start: function() { if (this.started) return this; this.staate = this.getHash(); if (Browser.Engine.trident) { var iframe = new Element('iframe', { 'src': "javascript:''", 'styles': { 'position': 'absolute', 'top': '-1000px' } }).inject(document.body).contentWindow; var writeState = function(staate) { iframe.document.write('Moo!'); iframe.document.close(); }; $extend(this, { '$listener': function(staate) { staate = decodeURIComponent(staate); if (this.staate != staate) this.setHash(staate).changeState(staate); }.bind(this), 'setState': function(staate, force) { if (this.staate != staate || force) { if (!force) this.setHash(staate).changeState(staate, true); writeState(staate); } return this; }, 'trace': function() { var staate = this.getHash(); if (staate != this.staate) writeState(staate); } }); var check = (function() { if (iframe.document && iframe.document.body) { check = $clear(check); if (!iframe.document.body.innerHTML) this.setState(this.staate); } }).periodical(50, this); } else { if (Browser.Engine.presto915) { new Element('img', { 'src': "javascript:location.href='javascript:History.trace();';", 'styles': { 'position': 'absolute', 'top': '-1000px' } }).inject(document.body); } } this.trace.periodical(150, this); this.started = true; return this; }, changeState: function(staate, manual) { var staateOld = this.staate; this.staate = staate; this.fireEvent('changed', [staate, staateOld, manual]); }, trace: function() { var staate = this.getHash(); if (staate != this.staate) { this.changeState(staate); } }, getHash: function() { var href = location.href, pos = href.indexOf('#') + 1; return (pos) ? href.substr(pos) : ''; }, setHash: function(staate) { location.hash = '#' + staate; return this; }, setState: function(staate) { if (this.staate !== staate) this.setHash(staate).changeState(staate, true); return this; }, getState: function() { return this.staate; } });