3 * Implements Special:ComparePages
5 * Copyright © 2010 Derk-Jan Hartman <hartman@videolan.org>
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.
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.
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
23 * @ingroup SpecialPage
27 * Implements Special:ComparePages
29 * @ingroup SpecialPage
31 class SpecialComparePages
extends SpecialPage
{
34 protected $opts, $skin;
36 // Some internal settings
37 protected $showNavigation = false;
39 public function __construct() {
40 parent
::__construct( 'ComparePages' );
44 * Show a form for filtering namespace and username
46 * @param string|null $par
48 public function execute( $par ) {
50 $this->outputHeader();
51 $this->getOutput()->addModuleStyles( 'mediawiki.special' );
53 $form = HTMLForm
::factory( 'ooui', [
57 'label-message' => 'compare-page1',
60 'validation-callback' => [ $this, 'checkExistingTitle' ],
66 'label-message' => 'compare-rev1',
69 'validation-callback' => [ $this, 'checkExistingRevision' ],
74 'label-message' => 'compare-page2',
77 'validation-callback' => [ $this, 'checkExistingTitle' ],
83 'label-message' => 'compare-rev2',
86 'validation-callback' => [ $this, 'checkExistingRevision' ],
100 ], $this->getContext(), 'compare' );
101 $form->setSubmitTextMsg( 'compare-submit' );
102 $form->suppressReset();
103 $form->setMethod( 'get' );
104 $form->setSubmitCallback( [ __CLASS__
, 'showDiff' ] );
107 $form->displayForm( '' );
111 public static function showDiff( $data, HTMLForm
$form ) {
112 $rev1 = self
::revOrTitle( $data['Revision1'], $data['Page1'] );
113 $rev2 = self
::revOrTitle( $data['Revision2'], $data['Page2'] );
115 if ( $rev1 && $rev2 ) {
116 $revision = Revision
::newFromId( $rev1 );
118 if ( $revision ) { // NOTE: $rev1 was already checked, should exist.
119 $contentHandler = $revision->getContentHandler();
120 $de = $contentHandler->createDifferenceEngine( $form->getContext(),
124 ( $data['Action'] == 'purge' ),
125 ( $data['Unhide'] == '1' )
127 $de->showDiffPage( true );
132 public static function revOrTitle( $revision, $title ) {
135 } elseif ( $title ) {
136 $title = Title
::newFromText( $title );
137 if ( $title instanceof Title
) {
138 return $title->getLatestRevID();
145 public function checkExistingTitle( $value, $alldata ) {
146 if ( $value === '' ||
$value === null ) {
149 $title = Title
::newFromText( $value );
150 if ( !$title instanceof Title
) {
151 return $this->msg( 'compare-invalid-title' )->parseAsBlock();
153 if ( !$title->exists() ) {
154 return $this->msg( 'compare-title-not-exists' )->parseAsBlock();
160 public function checkExistingRevision( $value, $alldata ) {
161 if ( $value === '' ||
$value === null ) {
164 $revision = Revision
::newFromId( $value );
165 if ( $revision === null ) {
166 return $this->msg( 'compare-revision-not-exists' )->parseAsBlock();
172 protected function getGroupName() {