76 lines
2.4 KiB
JavaScript
76 lines
2.4 KiB
JavaScript
(function () {
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var _MONTHS_ = ['január', 'február', 'március', 'április', 'május', 'június', 'július', 'augusztus', 'szeptember', 'október', 'november', 'december'];
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var _DAYS_ = ['vasárnap', 'hétfő', 'kedd', 'szerda', 'csütörtök', 'péntek', 'szombat'];
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var syncTimeout;
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var clockTimeout;
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var correct = 0;
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function getSyncedDateTime() {
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return new Date(new Date().getTime() - correct);
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}
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function fillZero(param) {
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return param < 10 ? '0' + String(param) : String(param);
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}
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function sync() {
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clearTimeout(syncTimeout);
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var started;
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var latency;
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var syncRequest = new XMLHttpRequest();
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syncRequest.onreadystatechange = function () {
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switch (syncRequest.readyState) {
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case XMLHttpRequest.OPENED:
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started = new Date().getTime();
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break;
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case XMLHttpRequest.HEADERS_RECEIVED:
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latency = (new Date().getTime() - started) / 2;
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break;
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case XMLHttpRequest.DONE:
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correct = new Date().getTime() - (parseInt(syncRequest.responseText) + latency);
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syncTimeout = setTimeout(sync, 10000);
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break;
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}
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}
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syncRequest.open('GET', 'getTime.php', true);
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syncRequest.send();
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}
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function clock() {
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var dateTime = getSyncedDateTime();
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document.getElementById('year').innerHTML = dateTime.getFullYear();
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document.getElementById('month').innerHTML = _MONTHS_[dateTime.getMonth()];
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document.getElementById('date').innerHTML = dateTime.getDate();
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document.getElementById('day').innerHTML = _DAYS_[dateTime.getDay()];
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document.getElementById('time').innerHTML = fillZero(dateTime.getHours()) + ':' + fillZero(dateTime.getMinutes()) + ':' + fillZero(dateTime.getSeconds());
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if (Math.abs(correct) < 100) {
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document.getElementById('correct').style.display = 'none';
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} else {
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document.getElementById('correct').style.display = 'block';
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document.getElementById('correct_seconds').innerHTML = (correct > 0 ? '+' : '') + (correct / 1000).toFixed(1);
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}
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clockTimeout = setTimeout(clock, 100);
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}
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document.getElementsByTagName('main')[0].ondblclick = function () {
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sync();
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}
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clock();
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sync();
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})();
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