mirror of
https://github.com/retspen/webvirtcloud
synced 2026-11-08 11:16:47 +00:00
eb6e6ca626
A VM list showed what it read when it was loaded: a VM stopped from inside its guest or with virsh, or made or removed elsewhere, showed only after a reload, unlike the VM page, which reloads when its VM's state changes. The lists of all VMs and of one host's VMs now poll the states of their VMs, at once and then every 5 s as the VM page does, and reload when an answer differs from the one before. The states come from one libvirt call per host; a user who does not see hosts gets only their own VMs. The page in use (a dialog, a field, an unsaved XML edit, a job outcome shown) holds the reload until it is free; that check is shared with the job panel.
60 lines
2.1 KiB
JavaScript
60 lines
2.1 KiB
JavaScript
// Repeats request() while the page is visible and passes each answer to
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// onData. request() returns a jQuery promise (e.g. $.getJSON(url)); onData is
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// called after the poller's own bookkeeping, so an error in it does not stop
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// the polling. One request at a time: the next one starts
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// interval ms after the previous one has finished, so a slow host does not
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// pile up requests, each holding a web worker. A hidden page asks nothing;
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// when it is shown again it asks at once. stop() pauses, start() resumes
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// at once (for example while a tab of the page is shown). The first request
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// goes out after firstDelay ms, the interval if it is not given.
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function pollWhileVisible(interval, request, onData, firstDelay) {
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var timer = null;
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var running = false;
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var stopped = false;
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function run() {
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timer = null;
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if (stopped || document.hidden) {
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return;
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}
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running = true;
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request()
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.always(function () {
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running = false;
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if (!stopped && !document.hidden) {
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timer = setTimeout(run, interval);
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}
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})
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.done(onData);
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}
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function resume() {
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if (!stopped && !document.hidden && !running && timer === null) {
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run();
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}
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}
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document.addEventListener("visibilitychange", resume);
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timer = setTimeout(run, firstDelay === undefined ? interval : firstDelay);
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return {
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stop: function () {
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stopped = true;
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clearTimeout(timer);
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timer = null;
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},
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start: function () {
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stopped = false;
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resume();
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},
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};
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}
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// The user is in the page: a dialog open, a field in use or an XML edit not
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// saved. A poll that would reload the page waits for its next answer.
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function pageInUse() {
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var active = document.activeElement;
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return !!document.querySelector(".modal.show")
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|| !!(active && active.matches && active.matches("input, select, textarea"))
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|| !!(window.xmlEditUnsaved && window.xmlEditUnsaved());
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}
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