resources/src/mediawiki.special/mediawiki.special.preferences.timezone.js

   1 /*!
   2  * JavaScript for Special:Preferences: Timezone field enhancements.
   3  */
   4 ( function ( mw, $ ) {
   5         $( function () {
   6                 var
   7                         $tzSelect, $tzTextbox, $localtimeHolder, servertime;
   8
   9                 // Timezone functions.
  10                 // Guesses Timezone from browser and updates fields onchange.
  11
  12                 $tzSelect = $( '#mw-input-wptimecorrection' );
  13                 $tzTextbox = $( '#mw-input-wptimecorrection-other' );
  14                 $localtimeHolder = $( '#wpLocalTime' );
  15                 servertime = parseInt( $( 'input[name="wpServerTime"]' ).val(), 10 );
  16
  17                 function minutesToHours( min ) {
  18                         var tzHour = Math.floor( Math.abs( min ) / 60 ),
  19                                 tzMin = Math.abs( min ) % 60,
  20                                 tzString = ( ( min >= 0 ) ? '' : '-' ) + ( ( tzHour < 10 ) ? '0' : '' ) + tzHour +
  21                                         ':' + ( ( tzMin < 10 ) ? '0' : '' ) + tzMin;
  22                         return tzString;
  23                 }
  24
  25                 function hoursToMinutes( hour ) {
  26                         var minutes,
  27                                 arr = hour.split( ':' );
  28
  29                         arr[ 0 ] = parseInt( arr[ 0 ], 10 );
  30
  31                         if ( arr.length === 1 ) {
  32                                 // Specification is of the form [-]XX
  33                                 minutes = arr[ 0 ] * 60;
  34                         } else {
  35                                 // Specification is of the form [-]XX:XX
  36                                 minutes = Math.abs( arr[ 0 ] ) * 60 + parseInt( arr[ 1 ], 10 );
  37                                 if ( arr[ 0 ] < 0 ) {
  38                                         minutes *= -1;
  39                                 }
  40                         }
  41                         // Gracefully handle non-numbers.
  42                         if ( isNaN( minutes ) ) {
  43                                 return 0;
  44                         } else {
  45                                 return minutes;
  46                         }
  47                 }
  48
  49                 function updateTimezoneSelection() {
  50                         var minuteDiff, localTime,
  51                                 type = $tzSelect.val();
  52
  53                         if ( type === 'other' ) {
  54                                 // User specified time zone manually in <input>
  55                                 // Grab data from the textbox, parse it.
  56                                 minuteDiff = hoursToMinutes( $tzTextbox.val() );
  57                         } else {
  58                                 // Time zone not manually specified by user
  59                                 if ( type === 'guess' ) {
  60                                         // Get browser timezone & fill it in
  61                                         minuteDiff = -( new Date().getTimezoneOffset() );
  62                                         $tzTextbox.val( minutesToHours( minuteDiff ) );
  63                                         $tzSelect.val( 'other' );
  64                                 } else {
  65                                         // Grab data from the $tzSelect value
  66                                         minuteDiff = parseInt( type.split( '|' )[ 1 ], 10 ) || 0;
  67                                 }
  68                         }
  69
  70                         // Determine local time from server time and minutes difference, for display.
  71                         localTime = servertime + minuteDiff;
  72
  73                         // Bring time within the [0,1440) range.
  74                         localTime = ( ( localTime % 1440 ) + 1440 ) % 1440;
  75
  76                         $localtimeHolder.text( mw.language.convertNumber( minutesToHours( localTime ) ) );
  77                 }
  78
  79                 if ( $tzSelect.length && $tzTextbox.length ) {
  80                         $tzSelect.change( updateTimezoneSelection );
  81                         $tzTextbox.blur( updateTimezoneSelection );
  82                         updateTimezoneSelection();
  83                 }
  84
  85         } );
  86 }( mediaWiki, jQuery ) );