var DefaultAgent = Class.create({
listener: null,
currentLocation: null,
initialize: function() {
this.listener = Prototype.emptyFunction;
this._setup();
},
add: function(url) {
window.location.hash = url;
this.currentLocation = window.location.hash;
},
addListener: function(listener) {
this.listener = listener;
this.currentLocation = "";
this._check();
},
_setup: function() {
this.currentLocation = "";
// setup location observer
window.setTimeout(function() {
this._check();
}.bind(this), 100);
},
_check: function() {
if (window.location.hash != this.currentLocation) {
this.currentLocation = window.location.hash;
this.listener(this.currentLocation.replace(/#/, ""));
}
window.setTimeout(function() {
this._check();
}.bind(this), 100);
}
});
var IEAgent = Class.create(DefaultAgent, {
historyFrame: null,
initialize: function($super) {
$super();
},
add: function($super, url) {
var doc = this.historyFrame.contentWindow.document;
doc.open("javascript:''");
doc.write("" + document.title + "parent.window.dhtmlHistory.update('" + url + "');");
doc.close();
$super(url);
},
titlePatch: function() {
this.historyFrame.contentWindow.document.title = document.title;
},
update: function(url) {
/*this option below gives the numeric sign when is setting the window location hash property*/
/*window.location.hash = url;*/
if (url != '' || window.location.hash.length > 1){
window.location.hash = url;
/*alert("on update funcion url: " + url + " , hash: " + window.location.hash + " hash length: " + window.location.hash.length + " url length: " + url.length);*/
this.removeLastHashSign();
}
this._check();
},
_setup: function() {
var frame = "";
document.write(frame);
this.historyFrame = $("_history");
},
_check: function() {
if (window.location.hash != this.currentLocation) {
this.currentLocation = window.location.hash;
this.listener(this.currentLocation.replace(/#/, ""));
}
},
removeLastHashSign: function(){
}
});
if (Prototype.Browser.IE) {
window.dhtmlHistory = new IEAgent();
} else if (Prototype.Browser.Gecko) {
window.dhtmlHistory = new DefaultAgent();
} else if (Prototype.Browser.WebKit) {
window.dhtmlHistory = new DefaultAgent();
} else if (Prototype.Browser.Opera) {
window.dhtmlHistory = new DefaultAgent();
} else {
// not supported browser
}