resources/src/mediawiki.action/mediawiki.action.edit.editWarning.js

   1 /*
   2  * Javascript for module editWarning
   3  */
   4 ( function ( mw, $ ) {
   5         'use strict';
   6
   7         $( function () {
   8                 var savedWindowOnBeforeUnload,
   9                         $wpTextbox1 = $( '#wpTextbox1' ),
  10                         $wpSummary = $( '#wpSummary' );
  11                 // Check if EditWarning is enabled and if we need it
  12                 if ( $wpTextbox1.length === 0 ) {
  13                         return true;
  14                 }
  15                 // Get the original values of some form elements
  16                 $wpTextbox1.add( $wpSummary ).each( function () {
  17                         $( this ).data( 'origtext', $( this ).val() );
  18                 } );
  19                 $( window )
  20                         .on( 'beforeunload.editwarning', function () {
  21                                 var retval;
  22
  23                                 // Check if the current values of some form elements are the same as
  24                                 // the original values
  25                                 if (
  26                                         mw.config.get( 'wgAction' ) === 'submit' ||
  27                                                 $wpTextbox1.data( 'origtext' ) !== $wpTextbox1.textSelection( 'getContents' ) ||
  28                                                 $wpSummary.data( 'origtext' ) !== $wpSummary.textSelection( 'getContents' )
  29                                 ) {
  30                                         // Return our message
  31                                         retval = mw.msg( 'editwarning-warning' );
  32                                 }
  33
  34                                 // Unset the onbeforeunload handler so we don't break page caching in Firefox
  35                                 savedWindowOnBeforeUnload = window.onbeforeunload;
  36                                 window.onbeforeunload = null;
  37                                 if ( retval !== undefined ) {
  38                                         // ...but if the user chooses not to leave the page, we need to rebind it
  39                                         setTimeout( function () {
  40                                                 window.onbeforeunload = savedWindowOnBeforeUnload;
  41                                         }, 1 );
  42                                         return retval;
  43                                 }
  44                         } )
  45                         .on( 'pageshow.editwarning', function () {
  46                                 // Re-add onbeforeunload handler
  47                                 if ( !window.onbeforeunload ) {
  48                                         window.onbeforeunload = savedWindowOnBeforeUnload;
  49                                 }
  50                         } );
  51
  52                 // Add form submission handler
  53                 $( '#editform' ).submit( function () {
  54                         // Unbind our handlers
  55                         $( window ).off( '.editwarning' );
  56                 } );
  57         } );
  58
  59 }( mediaWiki, jQuery ) );