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, saveButton, restoreButton;
   8
   9                 // Check if all of the form values are unchanged.
  10                 // (This function could be changed to infuse and check OOUI widgets, but that would only make it
  11                 // slower and more complicated. It works fine to treat them as HTML elements.)
  12                 function isPrefsChanged() {
  13                         var inputs = $( '#mw-prefs-form :input[name]' ),
  14                                 input, $input, inputType,
  15                                 index, optIndex,
  16                                 opt;
  17
  18                         for ( index = 0; index < inputs.length; index++ ) {
  19                                 input = inputs[ index ];
  20                                 $input = $( input );
  21
  22                                 // Different types of inputs have different methods for accessing defaults
  23                                 if ( $input.is( 'select' ) ) {
  24                                         // <select> has the property defaultSelected for each option
  25                                         for ( optIndex = 0; optIndex < input.options.length; optIndex++ ) {
  26                                                 opt = input.options[ optIndex ];
  27                                                 if ( opt.selected !== opt.defaultSelected ) {
  28                                                         return true;
  29                                                 }
  30                                         }
  31                                 } else if ( $input.is( 'input' ) ) { // <input> has defaultValue or defaultChecked
  32                                         inputType = input.type;
  33                                         if ( inputType === 'radio' || inputType === 'checkbox' ) {
  34                                                 if ( input.checked !== input.defaultChecked ) {
  35                                                         return true;
  36                                                 }
  37                                         } else if ( input.value !== input.defaultValue ) {
  38                                                 return true;
  39                                         }
  40                                 }
  41                         }
  42
  43                         return false;
  44                 }
  45
  46                 saveButton = OO.ui.infuse( $( '#prefcontrol' ) );
  47                 restoreButton = OO.ui.infuse( $( '#mw-prefs-restoreprefs' ) );
  48
  49                 // Disable the button to save preferences unless preferences have changed
  50                 // Check if preferences have been changed before JS has finished loading
  51                 if ( !isPrefsChanged() ) {
  52                         saveButton.setDisabled( true );
  53                         $( '#preferences .oo-ui-fieldsetLayout' ).one( 'change keydown mousedown', function () {
  54                                 saveButton.setDisabled( false );
  55                         } );
  56                 }
  57
  58                 // Set up a message to notify users if they try to leave the page without
  59                 // saving.
  60                 allowCloseWindow = mw.confirmCloseWindow( {
  61                         test: isPrefsChanged,
  62                         message: mw.msg( 'prefswarning-warning', mw.msg( 'saveprefs' ) ),
  63                         namespace: 'prefswarning'
  64                 } );
  65                 $( '#mw-prefs-form' ).submit( $.proxy( allowCloseWindow, 'release' ) );
  66                 restoreButton.on( 'click', function () {
  67                         allowCloseWindow.release();
  68                         // The default behavior of events in OOUI is always prevented. Follow the link manually.
  69                         // Note that middle-click etc. still works, as it doesn't emit a OOUI 'click' event.
  70                         location.href = restoreButton.getHref();
  71                 } );
  72         } );
  73 }( mediaWiki, jQuery ) );