MediaWiki:Common.js: Difference between revisions
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// ****************************************************** // | // ****************************************************** // | ||
/* Any JavaScript here will be loaded for all users on every page load. */ | |||
// ************************************************** | |||
// Experimental javascript countdown timer (Splarka) | |||
// Version 0.0.3 | |||
// ************************************************** | |||
// | |||
// Usage example: | |||
// <span class="countdown" style="display:none;"> | |||
// Only <span class="countdowndate">January 01 2007 00:00:00 PST</span> until New years. | |||
// </span> | |||
// <span class="nocountdown">Javascript disabled.</span> | |||
// | |||
// If the date is in the format "x|January 01 2007 00:00:00 PST", then the timer is periodic with period x seconds using the given date as the starting time. | |||
function updatetimer(i) { | |||
var now = new Date(); | |||
var then = timers[i].eventdate; | |||
var diff = Math.floor((then.getTime()-now.getTime())/1000); | |||
// catch bad date strings | |||
if(isNaN(diff)) { | |||
timers[i].firstChild.nodeValue = '** ' + timers[i].eventdate + ' **' ; | |||
return; | |||
} | |||
// reduce modulo period if necessary | |||
if(timers[i].period > 0){ | |||
if(diff<0) diff = timers[i].period - ((-diff)%timers[i].period); else diff = diff%timers[i].period; | |||
} | |||
// determine plus/minus | |||
if(diff<0) { | |||
diff = -diff; | |||
var tpm = ' '; | |||
} else { | |||
var tpm = ' '; | |||
} | |||
// calcuate the diff | |||
var left = (diff%60) + ' seconds'; | |||
diff=Math.floor(diff/60); | |||
if(diff > 0) left = (diff%60) + ' minutes ' + left; | |||
diff=Math.floor(diff/60); | |||
if(diff > 0) left = (diff%24) + ' hours ' + left; | |||
diff=Math.floor(diff/24); | |||
if(diff > 0) left = diff + ' days ' + left | |||
timers[i].firstChild.nodeValue = tpm + left; | |||
// a setInterval() is more efficient, but calling setTimeout() | |||
// makes errors break the script rather than infinitely recurse | |||
timeouts[i] = setTimeout('updatetimer(' + i + ')',1000); | |||
} | |||
function checktimers() { | |||
//hide 'nocountdown' and show 'countdown' | |||
var nocountdowns = getElementsByClassName(document, 'span', 'nocountdown'); | |||
for(var i in nocountdowns) nocountdowns[i].style.display = 'none' | |||
var countdowns = getElementsByClassName(document, 'span', 'countdown'); | |||
for(var i in countdowns) countdowns[i].style.display = 'inline' | |||
//set up global objects timers and timeouts. | |||
timers = getElementsByClassName(document, 'span', 'countdowndate'); | |||
timeouts = new Array(); // generic holder for the timeouts, global | |||
if(timers.length == 0) return; | |||
for(var i in timers) { | |||
var str = timers[i].firstChild.nodeValue; | |||
var j = str.indexOf('|'); | |||
if(j == -1) timers[i].period = 0; else { | |||
timers[i].period = parseInt(str.substr(0, j)); | |||
if(isNaN(timers[i].period) || timers[i].period < 0) timers[i].period = 0; | |||
str = str.substr(j + 1); | |||
} | |||
timers[i].eventdate = new Date(str); | |||
updatetimer(i); //start it up | |||
} | |||
} | |||
addOnloadHook(checktimers); | |||
// ************************************************** | |||
// - end - Experimental javascript countdown timer | |||
// ************************************************** | |||