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

   1 /*!
   2  * JavaScript for Special:Preferences
   3  */
   4 ( function ( mw, $ ) {
   5         $( function () {
   6                 var $preftoc, $preferences, $fieldsets,
   7                         labelFunc,
   8                         $tzSelect, $tzTextbox, $localtimeHolder, servertime,
   9                         allowCloseWindow, notif;
  10
  11                 labelFunc = function () {
  12                         return this.id.replace( /^mw-prefsection/g, 'preftab' );
  13                 };
  14
  15                 $( '#prefsubmit' ).attr( 'id', 'prefcontrol' );
  16                 $preftoc = $( '#preftoc' );
  17                 $preferences = $( '#preferences' );
  18
  19                 $fieldsets = $preferences.children( 'fieldset' )
  20                         .attr( {
  21                                 role: 'tabpanel',
  22                                 'aria-labelledby': labelFunc
  23                         } );
  24                 $fieldsets.not( '#mw-prefsection-personal' )
  25                                 .hide()
  26                                 .attr( 'aria-hidden', 'true' );
  27
  28                 // T115692: The following is kept for backwards compatibility with older skins
  29                 $preferences.addClass( 'jsprefs' );
  30                 $fieldsets.addClass( 'prefsection' );
  31                 $fieldsets.children( 'legend' ).addClass( 'mainLegend' );
  32
  33                 // Make sure the accessibility tip is selectable so that screen reader users take notice,
  34                 // but hide it per default to reduce interface clutter. Also make sure it becomes visible
  35                 // when selected. Similar to jquery.mw-jump
  36                 $( '<div>' ).addClass( 'mw-navigation-hint' )
  37                         .text( mw.msg( 'prefs-tabs-navigation-hint' ) )
  38                         .attr( 'tabIndex', 0 )
  39                         .on( 'focus blur', function ( e ) {
  40                                 if ( e.type === 'blur' || e.type === 'focusout' ) {
  41                                         $( this ).css( 'height', '0' );
  42                                 } else {
  43                                         $( this ).css( 'height', 'auto' );
  44                                 }
  45                         } ).insertBefore( $preftoc );
  46
  47                 /**
  48                  * It uses document.getElementById for security reasons (HTML injections in $()).
  49                  *
  50                  * @ignore
  51                  * @param {string} name the name of a tab without the prefix ("mw-prefsection-")
  52                  * @param {string} [mode] A hash will be set according to the current
  53                  *  open section. Set mode 'noHash' to surpress this.
  54                  */
  55                 function switchPrefTab( name, mode ) {
  56                         var $tab, scrollTop;
  57                         // Handle hash manually to prevent jumping,
  58                         // therefore save and restore scrollTop to prevent jumping.
  59                         scrollTop = $( window ).scrollTop();
  60                         if ( mode !== 'noHash' ) {
  61                                 location.hash = '#mw-prefsection-' + name;
  62                         }
  63                         $( window ).scrollTop( scrollTop );
  64
  65                         $preftoc.find( 'li' ).removeClass( 'selected' )
  66                                 .find( 'a' ).attr( {
  67                                         tabIndex: -1,
  68                                         'aria-selected': 'false'
  69                                 } );
  70
  71                         $tab = $( document.getElementById( 'preftab-' + name ) );
  72                         if ( $tab.length ) {
  73                                 $tab.attr( {
  74                                         tabIndex: 0,
  75                                         'aria-selected': 'true'
  76                                 } )
  77                                 .focus()
  78                                         .parent().addClass( 'selected' );
  79
  80                                 $preferences.children( 'fieldset' ).hide().attr( 'aria-hidden', 'true' );
  81                                 $( document.getElementById( 'mw-prefsection-' + name ) ).show().attr( 'aria-hidden', 'false' );
  82                         }
  83                 }
  84
  85                 // Check for messageboxes (.successbox, .warningbox, .errorbox) to replace with notifications
  86                 if ( $( '.mw-preferences-messagebox' ).length ) {
  87                         // If there is a #mw-preferences-success box and javascript is enabled, use a slick notification instead!
  88                         if ( $( '#mw-preferences-success' ).length ) {
  89                                 notif = mw.notification.notify( mw.message( 'savedprefs' ), { autoHide: false } );
  90                                 // 'change' event not reliable!
  91                                 $( '#preftoc, .prefsection' ).one( 'change keydown mousedown', function () {
  92                                         if ( notif ) {
  93                                                 notif.close();
  94                                                 notif = null;
  95                                         }
  96                                 } );
  97                         }
  98                 }
  99
 100                 // Enable keyboard users to use left and right keys to switch tabs
 101                 $preftoc.on( 'keydown', function ( event ) {
 102                         var keyLeft = 37,
 103                                 keyRight = 39,
 104                                 $el;
 105
 106                         if ( event.keyCode === keyLeft ) {
 107                                 $el = $( '#preftoc li.selected' ).prev().find( 'a' );
 108                         } else if ( event.keyCode === keyRight ) {
 109                                 $el = $( '#preftoc li.selected' ).next().find( 'a' );
 110                         } else {
 111                                 return;
 112                         }
 113                         if ( $el.length > 0 ) {
 114                                 switchPrefTab( $el.attr( 'href' ).replace( '#mw-prefsection-', '' ) );
 115                         }
 116                 } );
 117
 118                 // Jump to correct section as indicated by the hash.
 119                 // This function is called onload and onhashchange.
 120                 function detectHash() {
 121                         var hash = location.hash,
 122                                 matchedElement, parentSection;
 123                         if ( hash.match( /^#mw-prefsection-[\w\-]+/ ) ) {
 124                                 switchPrefTab( hash.replace( '#mw-prefsection-', '' ) );
 125                         } else if ( hash.match( /^#mw-[\w\-]+/ ) ) {
 126                                 matchedElement = document.getElementById( hash.slice( 1 ) );
 127                                 parentSection = $( matchedElement ).closest( '.prefsection' );
 128                                 if ( parentSection.length ) {
 129                                         // Switch to proper tab and scroll to selected item.
 130                                         switchPrefTab( parentSection.attr( 'id' ).replace( 'mw-prefsection-', '' ), 'noHash' );
 131                                         matchedElement.scrollIntoView();
 132                                 }
 133                         }
 134                 }
 135
 136                 // In browsers that support the onhashchange event we will not bind click
 137                 // handlers and instead let the browser do the default behavior (clicking the
 138                 // <a href="#.."> will naturally set the hash, handled by onhashchange.
 139                 // But other things that change the hash will also be caught (e.g. using
 140                 // the Back and Forward browser navigation).
 141                 // Note the special check for IE "compatibility" mode.
 142                 if ( 'onhashchange' in window &&
 143                         ( document.documentMode === undefined || document.documentMode >= 8 )
 144                 ) {
 145                         $( window ).on( 'hashchange', function () {
 146                                 var hash = location.hash;
 147                                 if ( hash.match( /^#mw-[\w\-]+/ ) ) {
 148                                         detectHash();
 149                                 } else if ( hash === '' ) {
 150                                         switchPrefTab( 'personal', 'noHash' );
 151                                 }
 152                         } )
 153                         // Run the function immediately to select the proper tab on startup.
 154                         .trigger( 'hashchange' );
 155                 // In older browsers we'll bind a click handler as fallback.
 156                 // We must not have onhashchange *and* the click handlers, otherwise
 157                 // the click handler calls switchPrefTab() which sets the hash value,
 158                 // which triggers onhashchange and calls switchPrefTab() again.
 159                 } else {
 160                         $preftoc.on( 'click', 'li a', function ( e ) {
 161                                 switchPrefTab( $( this ).attr( 'href' ).replace( '#mw-prefsection-', '' ) );
 162                                 e.preventDefault();
 163                         } );
 164                         // If we've reloaded the page or followed an open-in-new-window,
 165                         // make the selected tab visible.
 166                         detectHash();
 167                 }
 168
 169                 // Timezone functions.
 170                 // Guesses Timezone from browser and updates fields onchange.
 171
 172                 $tzSelect = $( '#mw-input-wptimecorrection' );
 173                 $tzTextbox = $( '#mw-input-wptimecorrection-other' );
 174                 $localtimeHolder = $( '#wpLocalTime' );
 175                 servertime = parseInt( $( 'input[name="wpServerTime"]' ).val(), 10 );
 176
 177                 function minutesToHours( min ) {
 178                         var tzHour = Math.floor( Math.abs( min ) / 60 ),
 179                                 tzMin = Math.abs( min ) % 60,
 180                                 tzString = ( ( min >= 0 ) ? '' : '-' ) + ( ( tzHour < 10 ) ? '0' : '' ) + tzHour +
 181                                         ':' + ( ( tzMin < 10 ) ? '0' : '' ) + tzMin;
 182                         return tzString;
 183                 }
 184
 185                 function hoursToMinutes( hour ) {
 186                         var minutes,
 187                                 arr = hour.split( ':' );
 188
 189                         arr[ 0 ] = parseInt( arr[ 0 ], 10 );
 190
 191                         if ( arr.length === 1 ) {
 192                                 // Specification is of the form [-]XX
 193                                 minutes = arr[ 0 ] * 60;
 194                         } else {
 195                                 // Specification is of the form [-]XX:XX
 196                                 minutes = Math.abs( arr[ 0 ] ) * 60 + parseInt( arr[ 1 ], 10 );
 197                                 if ( arr[ 0 ] < 0 ) {
 198                                         minutes *= -1;
 199                                 }
 200                         }
 201                         // Gracefully handle non-numbers.
 202                         if ( isNaN( minutes ) ) {
 203                                 return 0;
 204                         } else {
 205                                 return minutes;
 206                         }
 207                 }
 208
 209                 function updateTimezoneSelection() {
 210                         var minuteDiff, localTime,
 211                                 type = $tzSelect.val();
 212
 213                         if ( type === 'other' ) {
 214                                 // User specified time zone manually in <input>
 215                                 // Grab data from the textbox, parse it.
 216                                 minuteDiff = hoursToMinutes( $tzTextbox.val() );
 217                         } else {
 218                                 // Time zone not manually specified by user
 219                                 if ( type === 'guess' ) {
 220                                         // Get browser timezone & fill it in
 221                                         minuteDiff = -( new Date().getTimezoneOffset() );
 222                                         $tzTextbox.val( minutesToHours( minuteDiff ) );
 223                                         $tzSelect.val( 'other' );
 224                                         $tzTextbox.prop( 'disabled', false );
 225                                 } else {
 226                                         // Grab data from the $tzSelect value
 227                                         minuteDiff = parseInt( type.split( '|' )[ 1 ], 10 ) || 0;
 228                                         $tzTextbox.val( minutesToHours( minuteDiff ) );
 229                                 }
 230
 231                                 // Set defaultValue prop on the generated box so we don't trigger the
 232                                 // unsaved preferences check
 233                                 $tzTextbox.prop( 'defaultValue', $tzTextbox.val() );
 234                         }
 235
 236                         // Determine local time from server time and minutes difference, for display.
 237                         localTime = servertime + minuteDiff;
 238
 239                         // Bring time within the [0,1440) range.
 240                         localTime = ( ( localTime % 1440 ) + 1440 ) % 1440;
 241
 242                         $localtimeHolder.text( mw.language.convertNumber( minutesToHours( localTime ) ) );
 243                 }
 244
 245                 if ( $tzSelect.length && $tzTextbox.length ) {
 246                         $tzSelect.change( updateTimezoneSelection );
 247                         $tzTextbox.blur( updateTimezoneSelection );
 248                         updateTimezoneSelection();
 249                 }
 250
 251                 // Preserve the tab after saving the preferences
 252                 // Not using cookies, because their deletion results are inconsistent.
 253                 // Not using jStorage due to its enormous size (for this feature)
 254                 if ( window.sessionStorage ) {
 255                         if ( sessionStorage.getItem( 'mediawikiPreferencesTab' ) !== null ) {
 256                                 switchPrefTab( sessionStorage.getItem( 'mediawikiPreferencesTab' ), 'noHash' );
 257                         }
 258                         // Deleting the key, the tab states should be reset until we press Save
 259                         sessionStorage.removeItem( 'mediawikiPreferencesTab' );
 260
 261                         $( '#mw-prefs-form' ).submit( function () {
 262                                 var storageData = $( $preftoc ).find( 'li.selected a' ).attr( 'id' ).replace( 'preftab-', '' );
 263                                 sessionStorage.setItem( 'mediawikiPreferencesTab', storageData );
 264                         } );
 265                 }
 266
 267                 // Check if all of the form values are unchanged
 268                 function isPrefsChanged() {
 269                         var inputs = $( '#mw-prefs-form :input[name]' ),
 270                                 input, $input, inputType,
 271                                 index, optIndex,
 272                                 opt;
 273
 274                         for ( index = 0; index < inputs.length; index++ ) {
 275                                 input = inputs[ index ];
 276                                 $input = $( input );
 277
 278                                 // Different types of inputs have different methods for accessing defaults
 279                                 if ( $input.is( 'select' ) ) {
 280                                         // <select> has the property defaultSelected for each option
 281                                         for ( optIndex = 0; optIndex < input.options.length; optIndex++ ) {
 282                                                 opt = input.options[ optIndex ];
 283                                                 if ( opt.selected !== opt.defaultSelected ) {
 284                                                         return true;
 285                                                 }
 286                                         }
 287                                 } else if ( $input.is( 'input' ) ) { // <input> has defaultValue or defaultChecked
 288                                         inputType = input.type;
 289                                         if ( inputType === 'radio' || inputType === 'checkbox' ) {
 290                                                 if ( input.checked !== input.defaultChecked ) {
 291                                                         return true;
 292                                                 }
 293                                         } else if ( input.value !== input.defaultValue ) {
 294                                                 return true;
 295                                         }
 296                                 }
 297                         }
 298
 299                         return false;
 300                 }
 301
 302                 // Disable the button to save preferences unless preferences have changed
 303                 // Check if preferences have been changed before JS has finished loading
 304                 if ( !isPrefsChanged() ) {
 305                         $( '#prefcontrol' ).prop( 'disabled', true );
 306                         $( '#preferences > fieldset' ).one( 'change keydown mousedown', function () {
 307                                 $( '#prefcontrol' ).prop( 'disabled', false );
 308                         } );
 309                 }
 310
 311                 // Set up a message to notify users if they try to leave the page without
 312                 // saving.
 313                 allowCloseWindow = mw.confirmCloseWindow( {
 314                         test: isPrefsChanged,
 315                         message: mw.msg( 'prefswarning-warning', mw.msg( 'saveprefs' ) ),
 316                         namespace: 'prefswarning'
 317                 } );
 318                 $( '#mw-prefs-form' ).submit( $.proxy( allowCloseWindow, 'release' ) );
 319                 $( '#mw-prefs-restoreprefs' ).click( $.proxy( allowCloseWindow, 'release' ) );
 320         } );
 321 }( mediaWiki, jQuery ) );