skins/common/prefs.js

   1 // Timezone stuff
   2 // tz in format [+-]HHMM
   3 window.checkTimezone = function( tz, msg ) {
   4         var localclock = new Date();
   5         // returns negative offset from GMT in minutes
   6         var tzRaw = localclock.getTimezoneOffset();
   7         var tzHour = Math.floor( Math.abs( tzRaw ) / 60 );
   8         var tzMin = Math.abs( tzRaw ) % 60;
   9         var tzString = ( ( tzRaw >= 0 ) ? '-' : '+' ) + ( ( tzHour < 10 ) ? '0' : '' ) + tzHour + ( ( tzMin < 10 ) ? '0' : '' ) + tzMin;
  10         if ( tz != tzString ) {
  11                 var junk = msg.split('$1');
  12                 document.write( junk[0] + 'UTC' + tzString + junk[1] );
  13         }
  14 };
  15
  16 window.timezoneSetup = function() {
  17         var tzSelect = document.getElementById( 'mw-input-wptimecorrection' );
  18         var tzTextbox = document.getElementById( 'mw-input-wptimecorrection-other' );
  19
  20         if ( tzSelect && tzTextbox ) {
  21                 addHandler( tzSelect, 'change', function( e ) { updateTimezoneSelection( false ); } );
  22                 addHandler( tzTextbox, 'blur', function( e ) { updateTimezoneSelection( true ); } );
  23         }
  24
  25         updateTimezoneSelection( false );
  26 };
  27
  28 // in [-]HH:MM format...
  29 // won't yet work with non-even tzs
  30 window.fetchTimezone = function() {
  31         // FIXME: work around Safari bug
  32         var localclock = new Date();
  33         // returns negative offset from GMT in minutes
  34         var tzRaw = localclock.getTimezoneOffset();
  35         var tzHour = Math.floor( Math.abs( tzRaw ) / 60 );
  36         var tzMin = Math.abs( tzRaw ) % 60;
  37         var tzString = ( ( tzRaw >= 0 ) ? '-' : '' ) + ( ( tzHour < 10 ) ? '0' : '' ) + tzHour +
  38                 ':' + ( ( tzMin < 10 ) ? '0' : '' ) + tzMin;
  39         return tzString;
  40 };
  41
  42 window.guessTimezone = function() {
  43         var textbox = document.getElementById( 'mw-input-wptimecorrection-other' );
  44         var selector = document.getElementById( 'mw-input-wptimecorrection' );
  45
  46         selector.value = 'other';
  47         textbox.value = fetchTimezone();
  48         textbox.disabled = false; // The changed handler doesn't trip, obviously.
  49         updateTimezoneSelection( true );
  50 };
  51
  52 window.updateTimezoneSelection = function( force_offset ) {
  53         var selector = document.getElementById( 'mw-input-wptimecorrection' );
  54
  55         if ( selector.value == 'guess' ) {
  56                 return guessTimezone();
  57         }
  58
  59         var textbox = document.getElementById( 'mw-input-wptimecorrection-other' );
  60         var localtimeHolder = document.getElementById( 'wpLocalTime' );
  61         var servertime = document.getElementsByName( 'wpServerTime' )[0].value;
  62         var minDiff = 0;
  63
  64         // Compatibility code.
  65         if ( !selector.value ) {
  66                 selector.value = selector.options[selector.selectedIndex].value;
  67         }
  68
  69         // Handle force_offset
  70         if ( force_offset ) {
  71                 selector.value = 'other';
  72         }
  73
  74         // Get min_diff
  75         if ( selector.value == 'other' ) {
  76                 // Grab data from the textbox, parse it.
  77                 var diffArr = textbox.value.split(':');
  78                 if ( diffArr.length == 1 ) {
  79                         // Specification is of the form [-]XX
  80                         minDiff = parseInt( diffArr[0], 10 ) * 60;
  81                 } else {
  82                         // Specification is of the form [-]XX:XX
  83                         minDiff = Math.abs( parseInt( diffArr[0], 10 ) ) * 60 + parseInt( diffArr[1], 10 );
  84                         if ( parseInt( diffArr[0], 10 ) < 0 ) {
  85                                 minDiff = -minDiff;
  86                         }
  87                 }
  88         } else {
  89                 // Grab data from the selector value
  90                 var diffArr = selector.value.split('|');
  91                 minDiff = parseInt( diffArr[1], 10 );
  92         }
  93
  94         // Gracefully handle non-numbers.
  95         if ( isNaN( minDiff ) ) {
  96                 minDiff = 0;
  97         }
  98
  99         // Determine local time from server time and minutes difference, for display.
 100         var localTime = parseInt( servertime, 10 ) + minDiff;
 101
 102         // Bring time within the [0,1440) range.
 103         while ( localTime < 0 ) {
 104                 localTime += 1440;
 105         }
 106         while ( localTime >= 1440 ) {
 107                 localTime -= 1440;
 108         }
 109
 110         // Split to hour and minute
 111         var hour = String( Math.floor( localTime / 60 ) );
 112         if ( hour.length < 2 ) {
 113                 hour = '0' + hour;
 114         }
 115         var min = String(localTime%60);
 116         if ( min.length < 2 ) {
 117                 min = '0' + min;
 118         }
 119         changeText( localtimeHolder, hour + ':' + min );
 120
 121         // If the user selected from the drop-down, fill the offset field.
 122         if ( selector.value != 'other' ) {
 123                 hour = String( Math.abs( Math.floor( minDiff / 60 ) ) );
 124                 if ( hour.length < 2 ) {
 125                         hour = '0' + hour;
 126                 }
 127                 if ( minDiff < 0 ) {
 128                         hour = '-' + hour;
 129                 }
 130                 min = String(minDiff%60);
 131                 if ( min.length < 2 ) {
 132                         min = '0' + min;
 133                 }
 134                 textbox.value = hour + ':' + min;
 135         }
 136 };
 137
 138 addOnloadHook( timezoneSetup );