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timezone.js
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timezone.js
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/*!
* JavaScript for Special:Preferences: Timezone field enhancements.
*/
( function () {
mw.hook( 'htmlform.enhance' ).add( ( $root ) => {
const $target = $root.find( '#wpTimeCorrection' );
if (
// This preference could theoretically be disabled ($wgHiddenPrefs)
!$target.length ||
$target.closest( '.mw-htmlform-autoinfuse-lazy' ).length
) {
return;
}
// This is identical to OO.ui.infuse( ... ), but it makes the class name of the result known.
const timezoneWidget = mw.widgets.SelectWithInputWidget.static.infuse( $target );
const $localtimeHolder = $( '#wpLocalTime' );
const servertime = parseInt( $( 'input[name="wpServerTime"]' ).val(), 10 );
function minutesToHours( min ) {
const tzHour = Math.floor( Math.abs( min ) / 60 ),
tzMin = Math.abs( min ) % 60,
tzString = ( ( min >= 0 ) ? '' : '-' ) + ( ( tzHour < 10 ) ? '0' : '' ) + tzHour +
':' + ( ( tzMin < 10 ) ? '0' : '' ) + tzMin;
return tzString;
}
function hoursToMinutes( hour ) {
const arr = hour.split( ':' );
arr[ 0 ] = parseInt( arr[ 0 ], 10 );
let minutes;
if ( arr.length === 1 ) {
// Specification is of the form [-]XX
minutes = arr[ 0 ] * 60;
} else {
// Specification is of the form [-]XX:XX
minutes = Math.abs( arr[ 0 ] ) * 60 + parseInt( arr[ 1 ], 10 );
if ( arr[ 0 ] < 0 ) {
minutes *= -1;
}
}
// Gracefully handle non-numbers.
if ( isNaN( minutes ) ) {
return 0;
} else {
return minutes;
}
}
function updateTimezoneSelection() {
const type = timezoneWidget.dropdowninput.getValue();
let minuteDiff;
if ( type === 'other' ) {
// User specified time zone manually in <input>
// Grab data from the textbox, parse it.
minuteDiff = hoursToMinutes( timezoneWidget.textinput.getValue() );
} else {
// Time zone not manually specified by user
if ( type === 'guess' ) {
// Get the time offset
minuteDiff = -( new Date().getTimezoneOffset() );
} else {
// Grab data from the dropdown value
minuteDiff = parseInt( type.split( '|' )[ 1 ], 10 ) || 0;
}
}
// Determine local time from server time and minutes difference, for display.
let localTime = servertime + minuteDiff;
// Bring time within the [0,1440) range.
localTime = ( ( localTime % 1440 ) + 1440 ) % 1440;
$localtimeHolder.text( mw.language.convertNumber( minutesToHours( localTime ) ) );
}
timezoneWidget.dropdowninput.on( 'change', updateTimezoneSelection );
timezoneWidget.textinput.on( 'change', updateTimezoneSelection );
updateTimezoneSelection();
} );
}() );

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