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