includes/ImageGallery.php

   1 <?php
   2 if ( ! defined( 'MEDIAWIKI' ) )
   3         die( 1 );
   4
   5 /**
   6  */
   7
   8 /**
   9  * Image gallery
  10  *
  11  * Add images to the gallery using add(), then render that list to HTML using toHTML().
  12  *
  13  * @addtogroup Media
  14  */
  15 class ImageGallery
  16 {
  17         var $mImages, $mShowBytes, $mShowFilename;
  18         var $mCaption = false;
  19         var $mSkin = false;
  20
  21         /**
  22          * Is the gallery on a wiki page (i.e. not a special page)
  23          */
  24         var $mParsing;
  25
  26         /**
  27          * Contextual title, used when images are being screened
  28          * against the bad image list
  29          */
  30         private $contextTitle = false;
  31
  32         private $mPerRow = 4; // How many images wide should the gallery be?
  33         private $mWidths = 120, $mHeights = 120; // How wide/tall each thumbnail should be
  34
  35         /**
  36          * Create a new image gallery object.
  37          */
  38         function __construct( ) {
  39                 $this->mImages = array();
  40                 $this->mShowBytes = true;
  41                 $this->mShowFilename = true;
  42                 $this->mParsing = false;
  43         }
  44
  45         /**
  46          * Set the "parse" bit so we know to hide "bad" images
  47          */
  48         function setParsing( $val = true ) {
  49                 $this->mParsing = $val;
  50         }
  51
  52         /**
  53          * Set the caption (as plain text)
  54          *
  55          * @param $caption Caption
  56          */
  57         function setCaption( $caption ) {
  58                 $this->mCaption = htmlspecialchars( $caption );
  59         }
  60
  61         /**
  62          * Set the caption (as HTML)
  63          *
  64          * @param $caption Caption
  65          */
  66         public function setCaptionHtml( $caption ) {
  67                 $this->mCaption = $caption;
  68         }
  69
  70         /**
  71          * Set how many images will be displayed per row.
  72          *
  73          * @param int $num > 0; invalid numbers will be rejected
  74          */
  75         public function setPerRow( $num ) {
  76                 if ($num > 0) {
  77                         $this->mPerRow = (int)$num;
  78                 }
  79         }
  80
  81         /**
  82          * Set how wide each image will be, in pixels.
  83          *
  84          * @param int $num > 0; invalid numbers will be ignored
  85          */
  86         public function setWidths( $num ) {
  87                 if ($num > 0) {
  88                         $this->mWidths = (int)$num;
  89                 }
  90         }
  91
  92         /**
  93          * Set how high each image will be, in pixels.
  94          *
  95          * @param int $num > 0; invalid numbers will be ignored
  96          */
  97         public function setHeights( $num ) {
  98                 if ($num > 0) {
  99                         $this->mHeights = (int)$num;
 100                 }
 101         }
 102
 103         /**
 104          * Instruct the class to use a specific skin for rendering
 105          *
 106          * @param $skin Skin object
 107          */
 108         function useSkin( $skin ) {
 109                 $this->mSkin = $skin;
 110         }
 111
 112         /**
 113          * Return the skin that should be used
 114          *
 115          * @return Skin object
 116          */
 117         function getSkin() {
 118                 if( !$this->mSkin ) {
 119                         global $wgUser;
 120                         $skin = $wgUser->getSkin();
 121                 } else {
 122                         $skin = $this->mSkin;
 123                 }
 124                 return $skin;
 125         }
 126
 127         /**
 128          * Add an image to the gallery.
 129          *
 130          * @param $image Image object that is added to the gallery
 131          * @param $html  String: additional HTML text to be shown. The name and size of the image are always shown.
 132          */
 133         function add( $image, $html='' ) {
 134                 $this->mImages[] = array( &$image, $html );
 135                 wfDebug( "ImageGallery::add " . $image->getName() . "\n" );
 136         }
 137
 138         /**
 139         * Add an image at the beginning of the gallery.
 140         *
 141         * @param $image Image object that is added to the gallery
 142         * @param $html  String:  Additional HTML text to be shown. The name and size of the image are always shown.
 143         */
 144         function insert( $image, $html='' ) {
 145                 array_unshift( $this->mImages, array( &$image, $html ) );
 146         }
 147
 148
 149         /**
 150          * isEmpty() returns true if the gallery contains no images
 151          */
 152         function isEmpty() {
 153                 return empty( $this->mImages );
 154         }
 155
 156         /**
 157          * Enable/Disable showing of the file size of an image in the gallery.
 158          * Enabled by default.
 159          *
 160          * @param $f Boolean: set to false to disable.
 161          */
 162         function setShowBytes( $f ) {
 163                 $this->mShowBytes = ( $f == true);
 164         }
 165
 166         /**
 167          * Enable/Disable showing of the filename of an image in the gallery.
 168          * Enabled by default.
 169          *
 170          * @param $f Boolean: set to false to disable.
 171          */
 172         function setShowFilename( $f ) {
 173                 $this->mShowFilename = ( $f == true);
 174         }
 175
 176         /**
 177          * Return a HTML representation of the image gallery
 178          *
 179          * For each image in the gallery, display
 180          * - a thumbnail
 181          * - the image name
 182          * - the additional text provided when adding the image
 183          * - the size of the image
 184          *
 185          */
 186         function toHTML() {
 187                 global $wgLang;
 188
 189                 $sk = $this->getSkin();
 190
 191                 $s = '<table class="gallery" cellspacing="0" cellpadding="0">';
 192                 if( $this->mCaption )
 193                         $s .= "\n\t<caption>{$this->mCaption}</caption>";
 194
 195                 $params = array( 'width' => $this->mWidths, 'height' => $this->mHeights );
 196                 $i = 0;
 197                 foreach ( $this->mImages as $pair ) {
 198                         $img =& $pair[0];
 199                         $text = $pair[1];
 200
 201                         $nt = $img->getTitle();
 202
 203                         if( $nt->getNamespace() != NS_IMAGE ) {
 204                                 # We're dealing with a non-image, spit out the name and be done with it.
 205                                 $thumbhtml = "\n\t\t\t".'<div style="height: '.($this->mHeights*1.25+2).'px;">'
 206                                         . htmlspecialchars( $nt->getText() ) . '</div>';
 207                         } elseif( $this->mParsing && wfIsBadImage( $nt->getDBkey(), $this->getContextTitle() ) ) {
 208                                 # The image is blacklisted, just show it as a text link.
 209                                 $thumbhtml = "\n\t\t\t".'<div style="height: '.($this->mHeights*1.25+2).'px;">'
 210                                         . $sk->makeKnownLinkObj( $nt, htmlspecialchars( $nt->getText() ) ) . '</div>';
 211                         } elseif( !( $thumb = $img->transform( $params ) ) ) {
 212                                 # Error generating thumbnail.
 213                                 $thumbhtml = "\n\t\t\t".'<div style="height: '.($this->mHeights*1.25+2).'px;">'
 214                                         . htmlspecialchars( $img->getLastError() ) . '</div>';
 215                         } else {
 216                                 $vpad = floor( ( 1.25*$this->mHeights - $thumb->height ) /2 ) - 2;
 217                                 $thumbhtml = "\n\t\t\t".'<div class="thumb" style="padding: ' . $vpad . 'px 0; width: '.($this->mWidths+30).'px;">'
 218                                         . $sk->makeKnownLinkObj( $nt, $thumb->toHtml() ) . '</div>';
 219                         }
 220
 221                         //TODO
 222                         //$ul = $sk->makeLink( $wgContLang->getNsText( Namespace::getUser() ) . ":{$ut}", $ut );
 223
 224                         if( $this->mShowBytes ) {
 225                                 if( $img->exists() ) {
 226                                         $nb = wfMsgExt( 'nbytes', array( 'parsemag', 'escape'),
 227                                                 $wgLang->formatNum( $img->getSize() ) );
 228                                 } else {
 229                                         $nb = wfMsgHtml( 'filemissing' );
 230                                 }
 231                                 $nb = "$nb<br />\n";
 232                         } else {
 233                                 $nb = '';
 234                         }
 235
 236                         $textlink = $this->mShowFilename ?
 237                                 $sk->makeKnownLinkObj( $nt, htmlspecialchars( $wgLang->truncate( $nt->getText(), 20, '...' ) ) ) . "<br />\n" :
 238                                 '' ;
 239
 240                         # ATTENTION: The newline after <div class="gallerytext"> is needed to accommodate htmltidy which
 241                         # in version 4.8.6 generated crackpot html in its absence, see:
 242                         # http://bugzilla.wikimedia.org/show_bug.cgi?id=1765 -Ævar
 243
 244                         if ( $i % $this->mPerRow == 0 ) {
 245                                 $s .= "\n\t<tr>";
 246                         }
 247                         $s .=
 248                                 "\n\t\t" . '<td><div class="gallerybox" style="width: '.($this->mWidths*1.25).'px;">'
 249                                         . $thumbhtml
 250                                         . "\n\t\t\t" . '<div class="gallerytext">' . "\n"
 251                                                 . $textlink . $text . $nb
 252                                         . "\n\t\t\t</div>"
 253                                 . "\n\t\t</div></td>";
 254                         if ( $i % $this->mPerRow == $this->mPerRow - 1 ) {
 255                                 $s .= "\n\t</tr>";
 256                         }
 257                         ++$i;
 258                 }
 259                 if( $i % $this->mPerRow != 0 ) {
 260                         $s .= "\n\t</tr>";
 261                 }
 262                 $s .= "\n</table>";
 263
 264                 return $s;
 265         }
 266
 267         /**
 268          * @return int Number of images in the gallery
 269          */
 270         public function count() {
 271                 return count( $this->mImages );
 272         }
 273
 274         /**
 275          * Set the contextual title
 276          *
 277          * @param Title $title Contextual title
 278          */
 279         public function setContextTitle( $title ) {
 280                 $this->contextTitle = $title;
 281         }
 282
 283         /**
 284          * Get the contextual title, if applicable
 285          *
 286          * @return mixed Title or false
 287          */
 288         public function getContextTitle() {
 289                 return is_object( $this->contextTitle ) && $this->contextTitle instanceof Title
 290                                 ? $this->contextTitle
 291                                 : false;
 292         }
 293
 294 } //class
 295 ?>