includes/gallery/ImageGalleryBase.php

   1 <?php
   2 /**
   3  * Image gallery.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * Image gallery
  25  *
  26  * Add images to the gallery using add(), then render that list to HTML using toHTML().
  27  *
  28  * @ingroup Media
  29  */
  30 abstract class ImageGalleryBase extends ContextSource {
  31         /**
  32          * @var array Gallery images
  33          * @deprecated in 1.23 (was declared "var") and will be removed in 1.24
  34          */
  35         public $mImages;
  36
  37         /**
  38          * @var bool Whether to show the filesize in bytes in categories
  39          * @deprecated in 1.23 (was declared "var") and will be removed in 1.24
  40          */
  41         public $mShowBytes;
  42
  43         /**
  44          * @var bool Whether to show the filename. Default: true
  45          * @deprecated in 1.23 (was declared "var") and will be removed in 1.24
  46          */
  47         public $mShowFilename;
  48
  49         /**
  50          * @var string Gallery mode. Default: traditional
  51          * @deprecated in 1.23 (was declared "var") and will be removed in 1.24
  52          */
  53         public $mMode;
  54
  55         /**
  56          * @var bool|string Gallery caption. Default: false
  57          * @deprecated in 1.23 (was declared "var") and will be removed in 1.24
  58          */
  59         public $mCaption = false;
  60
  61         /**
  62          * @var bool Hide blacklisted images?
  63          * @deprecated in 1.23 (was declared "var") and will be removed in 1.24
  64          */
  65         public $mHideBadImages;
  66
  67         /**
  68          * @var Parser Registered parser object for output callbacks
  69          */
  70         public $mParser;
  71
  72         /**
  73          * @var Title Contextual title, used when images are being screened against
  74          *   the bad image list
  75          */
  76         protected $contextTitle = false;
  77
  78         /** @var array */
  79         protected $mAttribs = array();
  80
  81         /** @var bool */
  82         static private $modeMapping = false;
  83
  84         /**
  85          * Get a new image gallery. This is the method other callers
  86          * should use to get a gallery.
  87          *
  88          * @param string|bool $mode Mode to use. False to use the default
  89          * @throws MWException
  90          */
  91         static function factory( $mode = false ) {
  92                 global $wgGalleryOptions, $wgContLang;
  93                 self::loadModes();
  94                 if ( !$mode ) {
  95                         $mode = $wgGalleryOptions['mode'];
  96                 }
  97
  98                 $mode = $wgContLang->lc( $mode );
  99
 100                 if ( isset( self::$modeMapping[$mode] ) ) {
 101                         return new self::$modeMapping[$mode]( $mode );
 102                 } else {
 103                         throw new MWException( "No gallery class registered for mode $mode" );
 104                 }
 105         }
 106
 107         private static function loadModes() {
 108                 if ( self::$modeMapping === false ) {
 109                         self::$modeMapping = array(
 110                                 'traditional' => 'TraditionalImageGallery',
 111                                 'nolines' => 'NolinesImageGallery',
 112                                 'packed' => 'PackedImageGallery',
 113                                 'packed-hover' => 'PackedHoverImageGallery',
 114                                 'packed-overlay' => 'PackedOverlayImageGallery',
 115                         );
 116                         // Allow extensions to make a new gallery format.
 117                         wfRunHooks( 'GalleryGetModes', self::$modeMapping );
 118                 }
 119         }
 120
 121         /**
 122          * Create a new image gallery object.
 123          *
 124          * You should not call this directly, but instead use
 125          * ImageGalleryBase::factory().
 126          */
 127         function __construct( $mode = 'traditional' ) {
 128                 global $wgGalleryOptions;
 129                 $this->mImages = array();
 130                 $this->mShowBytes = $wgGalleryOptions['showBytes'];
 131                 $this->mShowFilename = true;
 132                 $this->mParser = false;
 133                 $this->mHideBadImages = false;
 134                 $this->mPerRow = $wgGalleryOptions['imagesPerRow'];
 135                 $this->mWidths = $wgGalleryOptions['imageWidth'];
 136                 $this->mHeights = $wgGalleryOptions['imageHeight'];
 137                 $this->mCaptionLength = $wgGalleryOptions['captionLength'];
 138                 $this->mMode = $mode;
 139         }
 140
 141         /**
 142          * Register a parser object. If you do not set this
 143          * and the output of this gallery ends up in parser
 144          * cache, the javascript will break!
 145          *
 146          * @note This also triggers using the page's target
 147          *  language instead of the user language.
 148          *
 149          * @param Parser $parser
 150          */
 151         function setParser( $parser ) {
 152                 $this->mParser = $parser;
 153         }
 154
 155         /**
 156          * Set bad image flag
 157          */
 158         function setHideBadImages( $flag = true ) {
 159                 $this->mHideBadImages = $flag;
 160         }
 161
 162         /**
 163          * Set the caption (as plain text)
 164          *
 165          * @param string $caption Caption
 166          */
 167         function setCaption( $caption ) {
 168                 $this->mCaption = htmlspecialchars( $caption );
 169         }
 170
 171         /**
 172          * Set the caption (as HTML)
 173          *
 174          * @param string $caption Caption
 175          */
 176         public function setCaptionHtml( $caption ) {
 177                 $this->mCaption = $caption;
 178         }
 179
 180         /**
 181          * Set how many images will be displayed per row.
 182          *
 183          * @param int $num Integer >= 0; If perrow=0 the gallery layout will adapt
 184          *   to screensize invalid numbers will be rejected
 185          */
 186         public function setPerRow( $num ) {
 187                 if ( $num >= 0 ) {
 188                         $this->mPerRow = (int)$num;
 189                 }
 190         }
 191
 192         /**
 193          * Set how wide each image will be, in pixels.
 194          *
 195          * @param int $num Integer > 0; invalid numbers will be ignored
 196          */
 197         public function setWidths( $num ) {
 198                 if ( $num > 0 ) {
 199                         $this->mWidths = (int)$num;
 200                 }
 201         }
 202
 203         /**
 204          * Set how high each image will be, in pixels.
 205          *
 206          * @param int $num Integer > 0; invalid numbers will be ignored
 207          */
 208         public function setHeights( $num ) {
 209                 if ( $num > 0 ) {
 210                         $this->mHeights = (int)$num;
 211                 }
 212         }
 213
 214         /**
 215          * Allow setting additional options. This is meant
 216          * to allow extensions to add additional parameters to
 217          * <gallery> parser tag.
 218          *
 219          * @param array $options Attributes of gallery tag
 220          */
 221         public function setAdditionalOptions( $options ) {
 222         }
 223
 224         /**
 225          * Add an image to the gallery.
 226          *
 227          * @param Title $title Title object of the image that is added to the gallery
 228          * @param string $html Additional HTML text to be shown. The name and size
 229          *   of the image are always shown.
 230          * @param string $alt Alt text for the image
 231          * @param string $link Override image link (optional)
 232          * @param array $handlerOpts Array of options for image handler (aka page number)
 233          */
 234         function add( $title, $html = '', $alt = '', $link = '', $handlerOpts = array() ) {
 235                 if ( $title instanceof File ) {
 236                         // Old calling convention
 237                         $title = $title->getTitle();
 238                 }
 239                 $this->mImages[] = array( $title, $html, $alt, $link, $handlerOpts );
 240                 wfDebug( 'ImageGallery::add ' . $title->getText() . "\n" );
 241         }
 242
 243         /**
 244          * Add an image at the beginning of the gallery.
 245          *
 246          * @param Title $title Title object of the image that is added to the gallery
 247          * @param string $html Additional HTML text to be shown. The name and size
 248          *   of the image are always shown.
 249          * @param string $alt Alt text for the image
 250          * @param string $link Override image link (optional)
 251          * @param array $handlerOpts Array of options for image handler (aka page number)
 252          */
 253         function insert( $title, $html = '', $alt = '', $link = '', $handlerOpts = array() ) {
 254                 if ( $title instanceof File ) {
 255                         // Old calling convention
 256                         $title = $title->getTitle();
 257                 }
 258                 array_unshift( $this->mImages, array( &$title, $html, $alt, $link, $handlerOpts ) );
 259         }
 260
 261         /**
 262          * isEmpty() returns true if the gallery contains no images
 263          * @return bool
 264          */
 265         function isEmpty() {
 266                 return empty( $this->mImages );
 267         }
 268
 269         /**
 270          * Enable/Disable showing of the file size of an image in the gallery.
 271          * Enabled by default.
 272          *
 273          * @param bool $f Set to false to disable
 274          */
 275         function setShowBytes( $f ) {
 276                 $this->mShowBytes = (bool)$f;
 277         }
 278
 279         /**
 280          * Enable/Disable showing of the filename of an image in the gallery.
 281          * Enabled by default.
 282          *
 283          * @param bool $f Set to false to disable
 284          */
 285         function setShowFilename( $f ) {
 286                 $this->mShowFilename = (bool)$f;
 287         }
 288
 289         /**
 290          * Set arbitrary attributes to go on the HTML gallery output element.
 291          * Should be suitable for a <ul> element.
 292          *
 293          * Note -- if taking from user input, you should probably run through
 294          * Sanitizer::validateAttributes() first.
 295          *
 296          * @param array $attribs Array of HTML attribute pairs
 297          */
 298         function setAttributes( $attribs ) {
 299                 $this->mAttribs = $attribs;
 300         }
 301
 302         /**
 303          * Display an html representation of the gallery
 304          *
 305          * @return string The html
 306          */
 307         abstract public function toHTML();
 308
 309         /**
 310          * @return int Number of images in the gallery
 311          */
 312         public function count() {
 313                 return count( $this->mImages );
 314         }
 315
 316         /**
 317          * Set the contextual title
 318          *
 319          * @param Title $title Contextual title
 320          */
 321         public function setContextTitle( $title ) {
 322                 $this->contextTitle = $title;
 323         }
 324
 325         /**
 326          * Get the contextual title, if applicable
 327          *
 328          * @return Title|bool Title or false
 329          */
 330         public function getContextTitle() {
 331                 return is_object( $this->contextTitle ) && $this->contextTitle instanceof Title
 332                         ? $this->contextTitle
 333                         : false;
 334         }
 335
 336         /**
 337          * Determines the correct language to be used for this image gallery
 338          * @return Language
 339          */
 340         protected function getRenderLang() {
 341                 return $this->mParser
 342                         ? $this->mParser->getTargetLanguage()
 343                         : $this->getLanguage();
 344         }
 345 }