includes/specials/SpecialComparePages.php

   1 <?php
   2 /**
   3  * Implements Special:ComparePages
   4  *
   5  * Copyright © 2010 Derk-Jan Hartman <hartman@videolan.org>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20  * http://www.gnu.org/copyleft/gpl.html
  21  *
  22  * @file
  23  * @ingroup SpecialPage
  24  */
  25
  26 /**
  27  * Implements Special:ComparePages
  28  *
  29  * @ingroup SpecialPage
  30  */
  31 class SpecialComparePages extends SpecialPage {
  32
  33         // Stored objects
  34         protected $opts, $skin;
  35
  36         // Some internal settings
  37         protected $showNavigation = false;
  38
  39         public function __construct() {
  40                 parent::__construct( 'ComparePages' );
  41         }
  42
  43         /**
  44          * Show a form for filtering namespace and username
  45          *
  46          * @param $par String
  47          * @return String
  48          */
  49         public function execute( $par ) {
  50                 $this->setHeaders();
  51                 $this->outputHeader();
  52
  53                 $form = new HTMLForm( array(
  54                         'Page1' => array(
  55                                 'type' => 'text',
  56                                 'name' => 'page1',
  57                                 'label-message' => 'compare-page1',
  58                                 'size' => '40',
  59                                 'section' => 'page1',
  60                         ),
  61                         'Revision1' => array(
  62                                 'type' => 'int',
  63                                 'name' => 'rev1',
  64                                 'label-message' => 'compare-rev1',
  65                                 'size' => '8',
  66                                 'section' => 'page1',
  67                         ),
  68                         'Page2' => array(
  69                                 'type' => 'text',
  70                                 'name' => 'page2',
  71                                 'label-message' => 'compare-page2',
  72                                 'size' => '40',
  73                                 'section' => 'page2',
  74                         ),
  75                         'Revision2' => array(
  76                                 'type' => 'int',
  77                                 'name' => 'rev2',
  78                                 'label-message' => 'compare-rev2',
  79                                 'size' => '8',
  80                                 'section' => 'page2',
  81                         ),
  82                         'Action' => array(
  83                                 'type' => 'hidden',
  84                                 'name' => 'action',
  85                         ),
  86                         'Diffonly' => array(
  87                                 'type' => 'hidden',
  88                                 'name' => 'diffonly',
  89                         ),
  90                 ), 'compare' );
  91                 $form->setSubmitText( wfMsg( 'compare-submit' ) );
  92                 $form->suppressReset();
  93                 $form->setMethod( 'get' );
  94                 $form->setTitle( $this->getTitle() );
  95
  96                 $form->loadData();
  97                 $form->displayForm( '' );
  98
  99                 self::showDiff( $form->mFieldData );
 100         }
 101
 102         public static function showDiff( $data ){
 103
 104                 if( $data['Revision1'] ){
 105                         $rev1 = $data['Revision1'];
 106                 } elseif( $data['Page1'] ) {
 107                         $title = Title::newFromText( $data['Page1'] );
 108                         if( $title instanceof Title ){
 109                                 $rev1 = $title->getLatestRevID();
 110                         }
 111                 } else {
 112                         $rev1 = null;
 113                 }
 114
 115                 if( $data['Revision2'] ){
 116                         $rev2 = $data['Revision2'];
 117                 } elseif( $data['Page2'] ) {
 118                         $title = Title::newFromText( $data['Page2'] );
 119                         if( $title instanceof Title ){
 120                                 $rev2 = $title->getLatestRevID();
 121                         }
 122                 } else {
 123                         $rev2 = null;
 124                 }
 125
 126                 if( $rev1 && $rev2 ) {
 127                         $de = new DifferenceEngine( null,
 128                                 $rev1,
 129                                 $rev2,
 130                                 null, // rcid
 131                                 ( $data["Action"] == 'purge' ),
 132                                 false );
 133                         $de->showDiffPage( true );
 134                 }
 135         }
 136 }