1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
<?php
/**
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
class ImageHistoryPseudoPager extends ReverseChronologicalPager {
protected $preventClickjacking = false;
/**
* @var File
*/
protected $mImg;
/**
* @var Title
*/
protected $mTitle;
/**
* @since 1.14
* @var ImagePage
*/
public $mImagePage;
/**
* @since 1.14
* @var File[]
*/
public $mHist;
/**
* @since 1.14
* @var int[]
*/
public $mRange;
/**
* @param ImagePage $imagePage
*/
public function __construct( $imagePage ) {
parent::__construct( $imagePage->getContext() );
$this->mImagePage = $imagePage;
$this->mTitle = $imagePage->getTitle()->createFragmentTarget( 'filehistory' );
$this->mImg = null;
$this->mHist = [];
$this->mRange = [ 0, 0 ]; // display range
// Only display 10 revisions at once by default, otherwise the list is overwhelming
$this->mLimitsShown = array_merge( [ 10 ], $this->mLimitsShown );
$this->mDefaultLimit = 10;
list( $this->mLimit, /* $offset */ ) =
$this->mRequest->getLimitOffset( $this->mDefaultLimit, '' );
}
/**
* @return Title
*/
public function getTitle() {
return $this->mTitle;
}
public function getQueryInfo() {
return false;
}
/**
* @return string
*/
public function getIndexField() {
return '';
}
/**
* @param object $row
* @return string
*/
public function formatRow( $row ) {
return '';
}
/**
* @return string
*/
public function getBody() {
$s = '';
$this->doQuery();
if ( count( $this->mHist ) ) {
if ( $this->mImg->isLocal() ) {
// Do a batch existence check for user pages and talkpages
$linkBatch = new LinkBatch();
for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
$file = $this->mHist[$i];
$user = $file->getUser( 'text' );
$linkBatch->add( NS_USER, $user );
$linkBatch->add( NS_USER_TALK, $user );
}
$linkBatch->execute();
}
$list = new ImageHistoryList( $this->mImagePage );
# Generate prev/next links
$navLink = $this->getNavigationBar();
$s = $list->beginImageHistoryList( $navLink );
// Skip rows there just for paging links
for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
$file = $this->mHist[$i];
$s .= $list->imageHistoryLine( !$file->isOld(), $file );
}
$s .= $list->endImageHistoryList( $navLink );
if ( $list->getPreventClickjacking() ) {
$this->preventClickjacking();
}
}
return $s;
}
public function doQuery() {
if ( $this->mQueryDone ) {
return;
}
$this->mImg = $this->mImagePage->getPage()->getFile(); // ensure loading
if ( !$this->mImg->exists() ) {
return;
}
$queryLimit = $this->mLimit + 1; // limit plus extra row
if ( $this->mIsBackwards ) {
// Fetch the file history
$this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
// The current rev may not meet the offset/limit
$numRows = count( $this->mHist );
if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
$this->mHist = array_merge( [ $this->mImg ], $this->mHist );
}
} else {
// The current rev may not meet the offset
if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
$this->mHist[] = $this->mImg;
}
// Old image versions (fetch extra row for nav links)
$oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
// Fetch the file history
$this->mHist = array_merge( $this->mHist,
$this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
}
$numRows = count( $this->mHist ); // Total number of query results
if ( $numRows ) {
# Index value of top item in the list
$firstIndex = $this->mIsBackwards ?
$this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
# Discard the extra result row if there is one
if ( $numRows > $this->mLimit && $numRows > 1 ) {
if ( $this->mIsBackwards ) {
# Index value of item past the index
$this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
# Index value of bottom item in the list
$lastIndex = $this->mHist[1]->getTimestamp();
# Display range
$this->mRange = [ 1, $numRows - 1 ];
} else {
# Index value of item past the index
$this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
# Index value of bottom item in the list
$lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
# Display range
$this->mRange = [ 0, $numRows - 2 ];
}
} else {
# Setting indexes to an empty string means that they will be
# omitted if they would otherwise appear in URLs. It just so
# happens that this is the right thing to do in the standard
# UI, in all the relevant cases.
$this->mPastTheEndIndex = '';
# Index value of bottom item in the list
$lastIndex = $this->mIsBackwards ?
$this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
# Display range
$this->mRange = [ 0, $numRows - 1 ];
}
} else {
$firstIndex = '';
$lastIndex = '';
$this->mPastTheEndIndex = '';
}
if ( $this->mIsBackwards ) {
$this->mIsFirst = ( $numRows < $queryLimit );
$this->mIsLast = ( $this->mOffset == '' );
$this->mLastShown = $firstIndex;
$this->mFirstShown = $lastIndex;
} else {
$this->mIsFirst = ( $this->mOffset == '' );
$this->mIsLast = ( $numRows < $queryLimit );
$this->mLastShown = $lastIndex;
$this->mFirstShown = $firstIndex;
}
$this->mQueryDone = true;
}
/**
* @param bool $enable
*/
protected function preventClickjacking( $enable = true ) {
$this->preventClickjacking = $enable;
}
/**
* @return bool
*/
public function getPreventClickjacking() {
return $this->preventClickjacking;
}
}
|
