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themes/base: xhr.js: implement running(), run() and halt() to check, start and stop the AJAX poll queue

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This commit is contained in:
Jo-Philipp Wich 2011-09-30 17:44:11 +00:00
parent 7aca8f2381
commit 3b2d4ab183
1 changed files with 48 additions and 11 deletions
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57
themes/base/htdocs/luci-static/resources/xhr.js
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@ -172,13 +172,22 @@ XHR.get = function(url, data, callback)
XHR.poll = function(interval, url, data, callback)
{
if (isNaN(interval) || interval <= 1)
if (isNaN(interval) || interval < 1)
interval = 5;
if (!XHR._q)
{
XHR._t = 0;
XHR._q = [ ];
XHR._r = function() {
for (var i = 0, e = XHR._q[0]; i < XHR._q.length; e = XHR._q[++i])
{
if (!(XHR._t % e.interval) && !e.xhr.busy())
e.xhr.get(e.url, e.data, e.callback);
}
XHR._t++;
};
}
XHR._q.push({
@ -189,16 +198,44 @@ XHR.poll = function(interval, url, data, callback)
xhr: new XHR()
});
if (!XHR._i)
{
XHR._i = window.setInterval(function() {
for (var i = 0, e = XHR._q[0]; i < XHR._q.length; e = XHR._q[++i])
{
if (!(XHR._t % e.interval) && !e.xhr.busy())
e.xhr.get(e.url, e.data, e.callback);
XHR.run();
}
XHR._t++;
}, 1000);
XHR.halt = function()
{
if (XHR._i)
{
/* show & set poll indicator */
try {
document.getElementById('xhr_poll_status').style.display = '';
document.getElementById('xhr_poll_status_on').style.display = 'none';
document.getElementById('xhr_poll_status_off').style.display = '';
} catch(e) { }
window.clearInterval(XHR._i);
XHR._i = null;
}
}
XHR.run = function()
{
if (XHR._r && !XHR._i)
{
/* show & set poll indicator */
try {
document.getElementById('xhr_poll_status').style.display = '';
document.getElementById('xhr_poll_status_on').style.display = '';
document.getElementById('xhr_poll_status_off').style.display = 'none';
} catch(e) { }
/* kick first round manually to prevent one second lag when setting up
* the poll interval */
XHR._r();
XHR._i = window.setInterval(XHR._r, 1000);
}
}
XHR.running = function()
{
return !!(XHR._r && XHR._i);
}