3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2 of the License, or
6 * (at your option) any later version.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
16 * http://www.gnu.org/copyleft/gpl.html
21 class ImageHistoryPseudoPager
extends ReverseChronologicalPager
{
22 protected $preventClickjacking = false;
53 * @param ImagePage $imagePage
55 public function __construct( $imagePage ) {
56 parent
::__construct( $imagePage->getContext() );
57 $this->mImagePage
= $imagePage;
58 $this->mTitle
= clone $imagePage->getTitle();
59 $this->mTitle
->setFragment( '#filehistory' );
62 $this->mRange
= [ 0, 0 ]; // display range
64 // Only display 10 revisions at once by default, otherwise the list is overwhelming
65 $this->mLimitsShown
= array_merge( [ 10 ], $this->mLimitsShown
);
66 $this->mDefaultLimit
= 10;
67 list( $this->mLimit
, /* $offset */ ) =
68 $this->mRequest
->getLimitOffset( $this->mDefaultLimit
, '' );
74 public function getTitle() {
78 public function getQueryInfo() {
85 public function getIndexField() {
93 public function formatRow( $row ) {
100 public function getBody() {
103 if ( count( $this->mHist
) ) {
104 if ( $this->mImg
->isLocal() ) {
105 // Do a batch existence check for user pages and talkpages
106 $linkBatch = new LinkBatch();
107 for ( $i = $this->mRange
[0]; $i <= $this->mRange
[1]; $i++
) {
108 $file = $this->mHist
[$i];
109 $user = $file->getUser( 'text' );
110 $linkBatch->add( NS_USER
, $user );
111 $linkBatch->add( NS_USER_TALK
, $user );
113 $linkBatch->execute();
116 $list = new ImageHistoryList( $this->mImagePage
);
117 # Generate prev/next links
118 $navLink = $this->getNavigationBar();
119 $s = $list->beginImageHistoryList( $navLink );
120 // Skip rows there just for paging links
121 for ( $i = $this->mRange
[0]; $i <= $this->mRange
[1]; $i++
) {
122 $file = $this->mHist
[$i];
123 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
125 $s .= $list->endImageHistoryList( $navLink );
127 if ( $list->getPreventClickjacking() ) {
128 $this->preventClickjacking();
134 public function doQuery() {
135 if ( $this->mQueryDone
) {
138 $this->mImg
= $this->mImagePage
->getPage()->getFile(); // ensure loading
139 if ( !$this->mImg
->exists() ) {
142 $queryLimit = $this->mLimit +
1; // limit plus extra row
143 if ( $this->mIsBackwards
) {
144 // Fetch the file history
145 $this->mHist
= $this->mImg
->getHistory( $queryLimit, null, $this->mOffset
, false );
146 // The current rev may not meet the offset/limit
147 $numRows = count( $this->mHist
);
148 if ( $numRows <= $this->mLimit
&& $this->mImg
->getTimestamp() > $this->mOffset
) {
149 $this->mHist
= array_merge( [ $this->mImg
], $this->mHist
);
152 // The current rev may not meet the offset
153 if ( !$this->mOffset ||
$this->mImg
->getTimestamp() < $this->mOffset
) {
154 $this->mHist
[] = $this->mImg
;
156 // Old image versions (fetch extra row for nav links)
157 $oiLimit = count( $this->mHist
) ?
$this->mLimit
: $this->mLimit +
1;
158 // Fetch the file history
159 $this->mHist
= array_merge( $this->mHist
,
160 $this->mImg
->getHistory( $oiLimit, $this->mOffset
, null, false ) );
162 $numRows = count( $this->mHist
); // Total number of query results
164 # Index value of top item in the list
165 $firstIndex = $this->mIsBackwards ?
166 $this->mHist
[$numRows - 1]->getTimestamp() : $this->mHist
[0]->getTimestamp();
167 # Discard the extra result row if there is one
168 if ( $numRows > $this->mLimit
&& $numRows > 1 ) {
169 if ( $this->mIsBackwards
) {
170 # Index value of item past the index
171 $this->mPastTheEndIndex
= $this->mHist
[0]->getTimestamp();
172 # Index value of bottom item in the list
173 $lastIndex = $this->mHist
[1]->getTimestamp();
175 $this->mRange
= [ 1, $numRows - 1 ];
177 # Index value of item past the index
178 $this->mPastTheEndIndex
= $this->mHist
[$numRows - 1]->getTimestamp();
179 # Index value of bottom item in the list
180 $lastIndex = $this->mHist
[$numRows - 2]->getTimestamp();
182 $this->mRange
= [ 0, $numRows - 2 ];
185 # Setting indexes to an empty string means that they will be
186 # omitted if they would otherwise appear in URLs. It just so
187 # happens that this is the right thing to do in the standard
188 # UI, in all the relevant cases.
189 $this->mPastTheEndIndex
= '';
190 # Index value of bottom item in the list
191 $lastIndex = $this->mIsBackwards ?
192 $this->mHist
[0]->getTimestamp() : $this->mHist
[$numRows - 1]->getTimestamp();
194 $this->mRange
= [ 0, $numRows - 1 ];
199 $this->mPastTheEndIndex
= '';
201 if ( $this->mIsBackwards
) {
202 $this->mIsFirst
= ( $numRows < $queryLimit );
203 $this->mIsLast
= ( $this->mOffset
== '' );
204 $this->mLastShown
= $firstIndex;
205 $this->mFirstShown
= $lastIndex;
207 $this->mIsFirst
= ( $this->mOffset
== '' );
208 $this->mIsLast
= ( $numRows < $queryLimit );
209 $this->mLastShown
= $lastIndex;
210 $this->mFirstShown
= $firstIndex;
212 $this->mQueryDone
= true;
216 * @param bool $enable
218 protected function preventClickjacking( $enable = true ) {
219 $this->preventClickjacking
= $enable;
225 public function getPreventClickjacking() {
226 return $this->preventClickjacking
;