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         var $mImages, $mShowBytes, $mShowFilename, $mMode;
  32         var $mCaption = false;
  33
  34         /**
  35          * Hide blacklisted images?
  36          */
  37         var $mHideBadImages;
  38
  39         /**
  40          * Registered parser object for output callbacks
  41          * @var Parser
  42          */
  43         var $mParser;
  44
  45         /**
  46          * Contextual title, used when images are being screened
  47          * against the bad image list
  48          */
  49         protected $contextTitle = false;
  50
  51         protected $mAttribs = array();
  52
  53         static private $modeMapping = false;
  54
  55         /**
  56          * Get a new image gallery. This is the method other callers
  57          * should use to get a gallery.
  58          *
  59          * @param String|bool $mode Mode to use. False to use the default.
  60          */
  61         static function factory( $mode = false ) {
  62                 global $wgGalleryOptions, $wgContLang;
  63                 self::loadModes();
  64                 if ( !$mode ) {
  65                         $mode = $wgGalleryOptions['mode'];
  66                 }
  67
  68                 $mode = $wgContLang->lc( $mode );
  69
  70                 if ( isset( self::$modeMapping[$mode] ) ) {
  71                         return new self::$modeMapping[$mode]( $mode );
  72                 } else {
  73                         throw new MWException( "No gallery class registered for mode $mode" );
  74                 }
  75         }
  76
  77         static private function loadModes() {
  78                 if ( self::$modeMapping === false ) {
  79                         self::$modeMapping = array(
  80                                 'traditional' => 'TraditionalImageGallery',
  81                                 'nolines' => 'NolinesImageGallery',
  82                                 'packed' => 'PackedImageGallery',
  83                                 'packed-hover' => 'PackedHoverImageGallery',
  84                                 'packed-overlay' => 'PackedOverlayImageGallery',
  85                         );
  86                         // Allow extensions to make a new gallery format.
  87                         wfRunHooks( 'GalleryGetModes', self::$modeMapping );
  88                 }
  89         }
  90
  91         /**
  92          * Create a new image gallery object.
  93          *
  94          * You should not call this directly, but instead use
  95          * ImageGalleryBase::factory().
  96          */
  97         function __construct( $mode = 'traditional' ) {
  98                 global $wgGalleryOptions;
  99                 $this->mImages = array();
 100                 $this->mShowBytes = $wgGalleryOptions['showBytes'];
 101                 $this->mShowFilename = true;
 102                 $this->mParser = false;
 103                 $this->mHideBadImages = false;
 104                 $this->mPerRow = $wgGalleryOptions['imagesPerRow'];
 105                 $this->mWidths = $wgGalleryOptions['imageWidth'];
 106                 $this->mHeights = $wgGalleryOptions['imageHeight'];
 107                 $this->mCaptionLength = $wgGalleryOptions['captionLength'];
 108                 $this->mMode = $mode;
 109         }
 110
 111         /**
 112          * Register a parser object. If you do not set this
 113          * and the output of this gallery ends up in parser
 114          * cache, the javascript will break!
 115          *
 116          * @note This also triggers using the page's target
 117          *  language instead of the user language.
 118          *
 119          * @param $parser Parser
 120          */
 121         function setParser( $parser ) {
 122                 $this->mParser = $parser;
 123         }
 124
 125         /**
 126          * Set bad image flag
 127          */
 128         function setHideBadImages( $flag = true ) {
 129                 $this->mHideBadImages = $flag;
 130         }
 131
 132         /**
 133          * Set the caption (as plain text)
 134          *
 135          * @param string $caption Caption
 136          */
 137         function setCaption( $caption ) {
 138                 $this->mCaption = htmlspecialchars( $caption );
 139         }
 140
 141         /**
 142          * Set the caption (as HTML)
 143          *
 144          * @param string $caption Caption
 145          */
 146         public function setCaptionHtml( $caption ) {
 147                 $this->mCaption = $caption;
 148         }
 149
 150         /**
 151          * Set how many images will be displayed per row.
 152          *
 153          * @param $num Integer >= 0; If perrow=0 the gallery layout will adapt to screensize
 154          * invalid numbers will be rejected
 155          */
 156         public function setPerRow( $num ) {
 157                 if ( $num >= 0 ) {
 158                         $this->mPerRow = (int)$num;
 159                 }
 160         }
 161
 162         /**
 163          * Set how wide each image will be, in pixels.
 164          *
 165          * @param $num Integer > 0; invalid numbers will be ignored
 166          */
 167         public function setWidths( $num ) {
 168                 if ( $num > 0 ) {
 169                         $this->mWidths = (int)$num;
 170                 }
 171         }
 172
 173         /**
 174          * Set how high each image will be, in pixels.
 175          *
 176          * @param $num Integer > 0; invalid numbers will be ignored
 177          */
 178         public function setHeights( $num ) {
 179                 if ( $num > 0 ) {
 180                         $this->mHeights = (int)$num;
 181                 }
 182         }
 183
 184         /**
 185          * Allow setting additional options. This is meant
 186          * to allow extensions to add additional parameters to
 187          * <gallery> parser tag.
 188          *
 189          * @param Array $options Attributes of gallery tag.
 190          */
 191         public function setAdditionalOptions( $options ) { }
 192
 193         /**
 194          * Instruct the class to use a specific skin for rendering
 195          *
 196          * @param $skin Skin object
 197          * @deprecated since 1.18 Not used anymore
 198          */
 199         function useSkin( $skin ) {
 200                 wfDeprecated( __METHOD__, '1.18' );
 201                 /* no op */
 202         }
 203
 204         /**
 205          * Add an image to the gallery.
 206          *
 207          * @param $title Title object of the image that is added to the gallery
 208          * @param $html  String: Additional HTML text to be shown. The name and size of the image are always shown.
 209          * @param $alt   String: Alt text for the image
 210          * @param $link  String: Override image link (optional)
 211          * @param $handlerOpts Array: Array of options for image handler (aka page number)
 212          */
 213         function add( $title, $html = '', $alt = '', $link = '', $handlerOpts = array() ) {
 214                 if ( $title instanceof File ) {
 215                         // Old calling convention
 216                         $title = $title->getTitle();
 217                 }
 218                 $this->mImages[] = array( $title, $html, $alt, $link, $handlerOpts );
 219                 wfDebug( 'ImageGallery::add ' . $title->getText() . "\n" );
 220         }
 221
 222         /**
 223          * Add an image at the beginning of the gallery.
 224          *
 225          * @param $title Title object of the image that is added to the gallery
 226          * @param $html  String: Additional HTML text to be shown. The name and size of the image are always shown.
 227          * @param $alt   String: Alt text for the image
 228          * @param $link  String: Override image link (optional)
 229          * @param $handlerOpts Array: Array of options for image handler (aka page number)
 230          */
 231         function insert( $title, $html = '', $alt = '', $link = '', $handlerOpts = array() ) {
 232                 if ( $title instanceof File ) {
 233                         // Old calling convention
 234                         $title = $title->getTitle();
 235                 }
 236                 array_unshift( $this->mImages, array( &$title, $html, $alt, $link, $handlerOpts ) );
 237         }
 238
 239         /**
 240          * isEmpty() returns true if the gallery contains no images
 241          * @return bool
 242          */
 243         function isEmpty() {
 244                 return empty( $this->mImages );
 245         }
 246
 247         /**
 248          * Enable/Disable showing of the file size of an image in the gallery.
 249          * Enabled by default.
 250          *
 251          * @param $f Boolean: set to false to disable.
 252          */
 253         function setShowBytes( $f ) {
 254                 $this->mShowBytes = (bool)$f;
 255         }
 256
 257         /**
 258          * Enable/Disable showing of the filename of an image in the gallery.
 259          * Enabled by default.
 260          *
 261          * @param $f Boolean: set to false to disable.
 262          */
 263         function setShowFilename( $f ) {
 264                 $this->mShowFilename = (bool)$f;
 265         }
 266
 267         /**
 268          * Set arbitrary attributes to go on the HTML gallery output element.
 269          * Should be suitable for a <ul> element.
 270          *
 271          * Note -- if taking from user input, you should probably run through
 272          * Sanitizer::validateAttributes() first.
 273          *
 274          * @param array $attribs of HTML attribute pairs
 275          */
 276         function setAttributes( $attribs ) {
 277                 $this->mAttribs = $attribs;
 278         }
 279
 280         /**
 281          * Display an html representation of the gallery
 282          *
 283          * @return String The html
 284          */
 285         abstract public function toHTML();
 286
 287         /**
 288          * @return Integer: number of images in the gallery
 289          */
 290         public function count() {
 291                 return count( $this->mImages );
 292         }
 293
 294         /**
 295          * Set the contextual title
 296          *
 297          * @param $title Title: contextual title
 298          */
 299         public function setContextTitle( $title ) {
 300                 $this->contextTitle = $title;
 301         }
 302
 303         /**
 304          * Get the contextual title, if applicable
 305          *
 306          * @return mixed Title or false
 307          */
 308         public function getContextTitle() {
 309                 return is_object( $this->contextTitle ) && $this->contextTitle instanceof Title
 310                         ? $this->contextTitle
 311                         : false;
 312         }
 313
 314         /**
 315          * Determines the correct language to be used for this image gallery
 316          * @return Language object
 317          */
 318         protected function getRenderLang() {
 319                 return $this->mParser
 320                         ? $this->mParser->getTargetLanguage()
 321                         : $this->getLanguage();
 322         }
 323
 324         /* Old constants no longer used.
 325         const THUMB_PADDING = 30;
 326         const GB_PADDING = 5;
 327         const GB_BORDERS = 8;
 328         */
 329
 330 }
 331