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

   1 /*!
   2  * JavaScript for Special:Preferences: Enable save button and prevent the window being accidentally
   3  * closed when any form field is changed.
   4  */
   5 ( function ( mw, $ ) {
   6         $( function () {
   7                 var allowCloseWindow;
   8
   9                 // Check if all of the form values are unchanged
  10                 function isPrefsChanged() {
  11                         var inputs = $( '#mw-prefs-form :input[name]' ),
  12                                 input, $input, inputType,
  13                                 index, optIndex,
  14                                 opt;
  15
  16                         for ( index = 0; index < inputs.length; index++ ) {
  17                                 input = inputs[ index ];
  18                                 $input = $( input );
  19
  20                                 // Different types of inputs have different methods for accessing defaults
  21                                 if ( $input.is( 'select' ) ) {
  22                                         // <select> has the property defaultSelected for each option
  23                                         for ( optIndex = 0; optIndex < input.options.length; optIndex++ ) {
  24                                                 opt = input.options[ optIndex ];
  25                                                 if ( opt.selected !== opt.defaultSelected ) {
  26                                                         return true;
  27                                                 }
  28                                         }
  29                                 } else if ( $input.is( 'input' ) ) { // <input> has defaultValue or defaultChecked
  30                                         inputType = input.type;
  31                                         if ( inputType === 'radio' || inputType === 'checkbox' ) {
  32                                                 if ( input.checked !== input.defaultChecked ) {
  33                                                         return true;
  34                                                 }
  35                                         } else if ( input.value !== input.defaultValue ) {
  36                                                 return true;
  37                                         }
  38                                 }
  39                         }
  40
  41                         return false;
  42                 }
  43
  44                 // Disable the button to save preferences unless preferences have changed
  45                 // Check if preferences have been changed before JS has finished loading
  46                 $( '#prefcontrol' ).prop( 'disabled', !isPrefsChanged() );
  47                 $( '#preferences > fieldset' ).on( 'change keyup mouseup', function () {
  48                         $( '#prefcontrol' ).prop( 'disabled', !isPrefsChanged() );
  49                 } );
  50
  51                 // Set up a message to notify users if they try to leave the page without
  52                 // saving.
  53                 allowCloseWindow = mw.confirmCloseWindow( {
  54                         test: isPrefsChanged,
  55                         message: mw.msg( 'prefswarning-warning', mw.msg( 'saveprefs' ) ),
  56                         namespace: 'prefswarning'
  57                 } );
  58                 $( '#mw-prefs-form' ).submit( $.proxy( allowCloseWindow, 'release' ) );
  59                 $( '#mw-prefs-restoreprefs' ).click( $.proxy( allowCloseWindow, 'release' ) );
  60         } );
  61 }( mediaWiki, jQuery ) );