if (typeof Jifty == "undefined") Jifty = { };
{
/* onPushHandler is called for each new pushed element.
(currently, this is always a <pushfrag>). This routine takes
the pushed element and extracts render mode (Before, After,
Replace, Delete) , region name and other rendering information.
Then it calls jifty's "apply_fragment_updates to the item
inside the <pushfrag> (the actual fragment);
f is the specification for the new fragment. (region, path,
mode and other infomration extracted from the fragment)
*/
var onPushHandler = function(t) {
var mode = t.getAttribute('mode');
var rid = t.firstChild.getAttribute('id');
var f = { region: rid, path: '', mode: mode };
f = prepare_element_for_update(f);
apply_fragment_updates(t.firstChild, f);
};
/* This function constructs a new Jifty.Subs object and sets
up a callback with HTTP.Push to run our onPushHandler each time
a new element is added to the hidden iframe's body.
We could instead say "sets up our transport. every time the
transport gets a new item, call onPushHandler" */
/* Jifty.Subs.start() will connect to the iframe transport */
Jifty.Subs = function(args) {
var window_id = args.window_id; // XXX: not yet
var uri = args.uri;
if (!uri)
uri = "/=/subs?";
//var push = new HTTP.Push({ "uri": uri, interval : 100, "onPush" : onPushHandler});
this.start = function() {
//push.start();
new Ajax.PeriodicalUpdater({},'/=/subs?forever=0',
{
'decay': 1, 'frequency': 0,
'asynchronous':true,
'evalScripts':false,
'method': 'get',
'onSuccess': onSuccess,
'onFailure': onFailure
});
};
}
function onSuccess(req, json) {
var container = document.createElement('div');
container.innerHTML = req.responseText;
var frags = container.getElementsByTagName('pushfrag');
for(var i = 0 ; i < frags.length; i++) {
onPushHandler(frags[i]);
}
}
function onFailure(req) { }
}