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   1  /*!
   2   * JavaScript for History action
   3   */
   4  jQuery( function ( $ ) {
   5      var    $historyCompareForm = $( '#mw-history-compare' ),
   6          $historySubmitter,
   7          $lis = $( '#pagehistory > li' );
   8  
   9      /**
  10       * @ignore
  11       * @context {Element} input
  12       * @param e {jQuery.Event}
  13       */
  14  	function updateDiffRadios() {
  15          var nextState = 'before',
  16              $li,
  17              $inputs,
  18              $oldidRadio,
  19              $diffRadio;
  20  
  21          if ( !$lis.length ) {
  22              return true;
  23          }
  24  
  25          $lis
  26          .each( function () {
  27              $li = $( this );
  28              $inputs = $li.find( 'input[type="radio"]' );
  29              $oldidRadio = $inputs.filter( '[name="oldid"]' ).eq( 0 );
  30              $diffRadio = $inputs.filter( '[name="diff"]' ).eq( 0 );
  31  
  32              $li.removeClass( 'selected between before after' );
  33  
  34              if ( !$oldidRadio.length || !$diffRadio.length ) {
  35                  return true;
  36              }
  37  
  38              if ( $oldidRadio.prop( 'checked' ) ) {
  39                  $li.addClass( 'selected after' );
  40                  nextState = 'after';
  41              } else if ( $diffRadio.prop( 'checked' ) ) {
  42                  $li.addClass( 'selected ' + nextState );
  43                  nextState = 'between';
  44              } else {
  45                  // This list item has neither checked
  46                  // apply the appropriate class following the previous item.
  47                  $li.addClass( nextState );
  48              }
  49          } );
  50  
  51          return true;
  52      }
  53  
  54      $lis.find( 'input[name="diff"], input[name="oldid"]' ).click( updateDiffRadios );
  55  
  56      // Set initial state
  57      updateDiffRadios();
  58  
  59      // Prettify url output for HistoryAction submissions,
  60      // to cover up action=historysubmit construction.
  61  
  62      // Ideally we'd use e.target instead of $historySubmitter, but e.target points
  63      // to the form element for submit actions, so.
  64      $historyCompareForm.find( '.historysubmit' ).click( function () {
  65          $historySubmitter = $( this );
  66      } );
  67  
  68      // On submit we clone the form element, remove unneeded fields in the clone
  69      // that pollute the query parameter with stuff from the other "use case",
  70      // and then submit the clone.
  71      // Without the cloning we'd be changing the real form, which is slower, could make
  72      // the page look broken for a second in slow browsers and might show the form broken
  73      // again when coming back from a "next" page.
  74      $historyCompareForm.submit( function ( e ) {
  75          var    $copyForm, $copyRadios, $copyAction;
  76  
  77          if ( $historySubmitter ) {
  78              $copyForm = $historyCompareForm.clone();
  79              $copyRadios = $copyForm.find( '#pagehistory > li' ).find( 'input[name="diff"], input[name="oldid"]' );
  80              $copyAction = $copyForm.find( '> [name="action"]' );
  81  
  82              // Remove action=historysubmit and ids[..]=..
  83              if ( $historySubmitter.hasClass( 'mw-history-compareselectedversions-button' ) ) {
  84                  $copyAction.remove();
  85                  $copyForm.find( 'input[name^="ids["]:checked' ).prop( 'checked', false );
  86  
  87              // Remove diff=&oldid=, change action=historysubmit to revisiondelete, remove revisiondelete
  88              } else if ( $historySubmitter.hasClass( 'mw-history-revisiondelete-button' ) ) {
  89                  $copyRadios.remove();
  90                  $copyAction.val( $historySubmitter.attr( 'name' ) );
  91                  $copyForm.find( ':submit' ).remove();
  92              }
  93  
  94              // IE7 doesn't do submission from an off-DOM clone, so insert hidden into document first
  95              // Also remove potentially conflicting id attributes that we don't need anyway
  96              $copyForm
  97                  .css( 'display', 'none' )
  98                  .find( '[id]' )
  99                      .removeAttr( 'id' )
 100                  .end()
 101                  .insertAfter( $historyCompareForm )
 102                  .submit();
 103  
 104              e.preventDefault();
 105              return false; // Because the submit is special, return false as well.
 106          }
 107  
 108          // Continue natural browser handling other wise
 109          return true;
 110      } );
 111  } );