1 files changed, 86 insertions, 0 deletions
diff --git a/www/wiki/resources/src/mediawiki.special/mediawiki.special.preferences.timezone.js b/www/wiki/resources/src/mediawiki.special/mediawiki.special.preferences.timezone.js
new file mode 100644
index 00000000..03656eed
--- /dev/null
+++ b/www/wiki/resources/src/mediawiki.special/mediawiki.special.preferences.timezone.js
@@ -0,0 +1,86 @@
+/*!
+ * JavaScript for Special:Preferences: Timezone field enhancements.
+ */
+( function ( mw, $ ) {
+	$( function () {
+		var
+			$tzSelect, $tzTextbox, $localtimeHolder, servertime;
+
+		// Timezone functions.
+		// Guesses Timezone from browser and updates fields onchange.
+
+		$tzSelect = $( '#mw-input-wptimecorrection' );
+		$tzTextbox = $( '#mw-input-wptimecorrection-other' );
+		$localtimeHolder = $( '#wpLocalTime' );
+		servertime = parseInt( $( 'input[name="wpServerTime"]' ).val(), 10 );
+
+		function minutesToHours( min ) {
+			var 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 ) {
+			var minutes,
+				arr = hour.split( ':' );
+
+			arr[ 0 ] = parseInt( arr[ 0 ], 10 );
+
+			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() {
+			var minuteDiff, localTime,
+				type = $tzSelect.val();
+
+			if ( type === 'other' ) {
+				// User specified time zone manually in <input>
+				// Grab data from the textbox, parse it.
+				minuteDiff = hoursToMinutes( $tzTextbox.val() );
+			} else {
+				// Time zone not manually specified by user
+				if ( type === 'guess' ) {
+					// Get browser timezone & fill it in
+					minuteDiff = -( new Date().getTimezoneOffset() );
+					$tzTextbox.val( minutesToHours( minuteDiff ) );
+					$tzSelect.val( 'other' );
+				} else {
+					// Grab data from the $tzSelect value
+					minuteDiff = parseInt( type.split( '|' )[ 1 ], 10 ) || 0;
+				}
+			}
+
+			// Determine local time from server time and minutes difference, for display.
+			localTime = servertime + minuteDiff;
+
+			// Bring time within the [0,1440) range.
+			localTime = ( ( localTime % 1440 ) + 1440 ) % 1440;
+
+			$localtimeHolder.text( mw.language.convertNumber( minutesToHours( localTime ) ) );
+		}
+
+		if ( $tzSelect.length && $tzTextbox.length ) {
+			$tzSelect.change( updateTimezoneSelection );
+			$tzTextbox.blur( updateTimezoneSelection );
+			updateTimezoneSelection();
+		}
+
+	} );
+}( mediaWiki, jQuery ) );