includes/Image.php

   1 <?php
   2 /**
   3  * @package MediaWiki
   4  */
   5
   6 /**
   7  * Class to represent an image
   8  *
   9  * Provides methods to retrieve paths (physical, logical, URL),
  10  * to generate thumbnails or for uploading.
  11  * @package MediaWiki
  12  */
  13 class Image
  14 {
  15         /**#@+
  16          * @access private
  17          */
  18         var     $name,          # name of the image (constructor)
  19                 $imagePath,     # Path of the image (loadFromXxx)
  20                 $url,           # Image URL (accessor)
  21                 $title,         # Title object for this image (constructor)
  22                 $fileExists,    # does the image file exist on disk? (loadFromXxx)
  23                 $fromSharedDirectory, # load this image from $wgSharedUploadDirectory (loadFromXxx)
  24                 $historyLine,   # Number of line to return by nextHistoryLine() (constructor)
  25                 $historyRes,    # result of the query for the image's history (nextHistoryLine)
  26                 $width,         # \
  27                 $height,        #  |
  28                 $bits,          #   --- returned by getimagesize (loadFromXxx)
  29                 $type,          #  |
  30                 $attr,          # /
  31                 $size,          # Size in bytes (loadFromXxx)
  32                 $dataLoaded;    # Whether or not all this has been loaded from the database (loadFromXxx)
  33
  34
  35         /**#@-*/
  36
  37         /**
  38          * Create an Image object from an image name
  39          *
  40          * @param string $name name of the image, used to create a title object using Title::makeTitleSafe
  41          * @access public
  42          */
  43         function newFromName( $name ) {
  44                 $title = Title::makeTitleSafe( NS_IMAGE, $name );
  45                 return new Image( $title );
  46         }
  47
  48         /**
  49          * Obsolete factory function, use constructor
  50          */
  51         function newFromTitle( $title ) {
  52                 return new Image( $title );
  53         }
  54
  55         function Image( $title ) {
  56                 $this->title =& $title;
  57                 $this->name = $title->getDBkey();
  58
  59                 $n = strrpos( $this->name, '.' );
  60                 $this->extension = strtolower( $n ? substr( $this->name, $n + 1 ) : '' );
  61                 $this->historyLine = 0;
  62
  63                 $this->dataLoaded = false;
  64         }
  65
  66         /**
  67          * Get the memcached keys
  68          * Returns an array, first element is the local cache key, second is the shared cache key, if there is one
  69          */
  70         function getCacheKeys( $shared = false ) {
  71                 global $wgDBname, $wgUseSharedUploads, $wgSharedUploadDBname, $wgCacheSharedUploads;
  72
  73                 $foundCached = false;
  74                 $hashedName = md5($this->name);
  75                 $keys = array( "$wgDBname:Image:$hashedName" );
  76                 if ( $wgUseSharedUploads && $wgSharedUploadDBname && $wgCacheSharedUploads ) {
  77                         $keys[] = "$wgSharedUploadDBname:Image:$hashedName";
  78                 }
  79                 return $keys;
  80         }
  81
  82         /**
  83          * Try to load image metadata from memcached. Returns true on success.
  84          */
  85         function loadFromCache() {
  86                 global $wgUseSharedUploads, $wgMemc;
  87                 $fname = 'Image::loadFromMemcached';
  88                 wfProfileIn( $fname );
  89                 $this->dataLoaded = false;
  90                 $keys = $this->getCacheKeys();
  91                 $cachedValues = $wgMemc->get( $keys[0] );
  92
  93                 // Check if the key existed and belongs to this version of MediaWiki
  94                 if (!empty($cachedValues) && is_array($cachedValues) && isset($cachedValues['width']) && $cachedValues['fileExists']) {
  95                         if ( $wgUseSharedUploads && $cachedValues['fromShared']) {
  96                                 # if this is shared file, we need to check if image
  97                                 # in shared repository has not changed
  98                                 if ( isset( $keys[1] ) ) {
  99                                         $commonsCachedValues = $wgMemc->get( $keys[1] );
 100                                         if (!empty($commonsCachedValues) && is_array($commonsCachedValues) && isset($commonsCachedValues['width'])) {
 101                                                 $this->name = $commonsCachedValues['name'];
 102                                                 $this->imagePath = $commonsCachedValues['imagePath'];
 103                                                 $this->fileExists = $commonsCachedValues['fileExists'];
 104                                                 $this->width = $commonsCachedValues['width'];
 105                                                 $this->height = $commonsCachedValues['height'];
 106                                                 $this->bits = $commonsCachedValues['bits'];
 107                                                 $this->type = $commonsCachedValues['type'];
 108                                                 $this->size = $commonsCachedValues['size'];
 109                                                 $this->fromSharedDirectory = true;
 110                                                 $this->dataLoaded = true;
 111                                                 $this->imagePath = $this->getFullPath(true);
 112                                         }
 113                                 }
 114                         }
 115                         else {
 116                                 $this->name = $cachedValues['name'];
 117                                 $this->imagePath = $cachedValues['imagePath'];
 118                                 $this->fileExists = $cachedValues['fileExists'];
 119                                 $this->width = $cachedValues['width'];
 120                                 $this->height = $cachedValues['height'];
 121                                 $this->bits = $cachedValues['bits'];
 122                                 $this->type = $cachedValues['type'];
 123                                 $this->size = $cachedValues['size'];
 124                                 $this->fromSharedDirectory = false;
 125                                 $this->dataLoaded = true;
 126                                 $this->imagePath = $this->getFullPath();
 127                         }
 128                 }
 129
 130                 wfProfileOut( $fname );
 131                 return $this->dataLoaded;
 132         }
 133
 134         /**
 135          * Save the image metadata to memcached
 136          */
 137         function saveToCache() {
 138                 global $wgMemc;
 139                 $this->load();
 140                 // We can't cache metadata for non-existent files, because if the file later appears
 141                 // in commons, the local keys won't be purged.
 142                 if ( $this->fileExists ) {
 143                         $keys = $this->getCacheKeys();
 144
 145                         $cachedValues = array('name' => $this->name,
 146                                                                   'imagePath' => $this->imagePath,
 147                                                                   'fileExists' => $this->fileExists,
 148                                                                   'fromShared' => $this->fromSharedDirectory,
 149                                                                   'width' => $this->width,
 150                                                                   'height' => $this->height,
 151                                                                   'bits' => $this->bits,
 152                                                                   'type' => $this->type,
 153                                                                   'size' => $this->size);
 154
 155                         $wgMemc->set( $keys[0], $cachedValues );
 156                 }
 157         }
 158
 159         /**
 160          * Load metadata from the file itself
 161          */
 162         function loadFromFile() {
 163                 global $wgUseSharedUploads, $wgSharedUploadDirectory, $wgLang;
 164                 $fname = 'Image::loadFromFile';
 165                 wfProfileIn( $fname );
 166                 $this->imagePath = $this->getFullPath();
 167                 $this->fileExists = file_exists( $this->imagePath );
 168                 $this->fromSharedDirectory = false;
 169                 $gis = false;
 170
 171                 # If the file is not found, and a shared upload directory is used, look for it there.
 172                 if (!$this->fileExists && $wgUseSharedUploads && $wgSharedUploadDirectory) {
 173                         # In case we're on a wgCapitalLinks=false wiki, we
 174                         # capitalize the first letter of the filename before
 175                         # looking it up in the shared repository.
 176                         $sharedImage = Image::newFromName( $wgLang->ucfirst($this->name) );
 177                         $this->fileExists = file_exists( $sharedImage->getFullPath(true) );
 178                         if ( $this->fileExists ) {
 179                                 $this->name = $sharedImage->name;
 180                                 $this->imagePath = $this->getFullPath(true);
 181                                 $this->fromSharedDirectory = true;
 182                         }
 183                 }
 184
 185                 if ( $this->fileExists ) {
 186                         # Get size in bytes
 187                         $this->size = filesize( $this->imagePath );
 188
 189                         # Height and width
 190                         # Don't try to get the width and height of sound and video files, that's bad for performance
 191                         if ( !Image::isKnownImageExtension( $this->extension ) ) {
 192                                 $gis = false;
 193                         } elseif( $this->extension == 'svg' ) {
 194                                 wfSuppressWarnings();
 195                                 $gis = wfGetSVGsize( $this->imagePath );
 196                                 wfRestoreWarnings();
 197                         } else {
 198                                 wfSuppressWarnings();
 199                                 $gis = getimagesize( $this->imagePath );
 200                                 wfRestoreWarnings();
 201                         }
 202                 }
 203                 if( $gis === false ) {
 204                         $this->width = 0;
 205                         $this->height = 0;
 206                         $this->bits = 0;
 207                         $this->type = 0;
 208                 } else {
 209                         $this->width = $gis[0];
 210                         $this->height = $gis[1];
 211                         $this->type = $gis[2];
 212                         if ( isset( $gis['bits'] ) )  {
 213                                 $this->bits = $gis['bits'];
 214                         } else {
 215                                 $this->bits = 0;
 216                         }
 217                 }
 218                 $this->dataLoaded = true;
 219                 wfProfileOut( $fname );
 220         }
 221
 222         /**
 223          * Load image metadata from the DB
 224          */
 225         function loadFromDB() {
 226                 global $wgUseSharedUploads, $wgSharedUploadDBname, $wgLang;
 227                 $fname = 'Image::loadFromDB';
 228                 wfProfileIn( $fname );
 229
 230                 $dbr =& wfGetDB( DB_SLAVE );
 231                 $row = $dbr->selectRow( 'image',
 232                         array( 'img_size', 'img_width', 'img_height', 'img_bits', 'img_type' ),
 233                         array( 'img_name' => $this->name ), $fname );
 234                 if ( $row ) {
 235                         $this->fromSharedDirectory = false;
 236                         $this->fileExists = true;
 237                         $this->loadFromRow( $row );
 238                         $this->imagePath = $this->getFullPath();
 239                         // Check for rows from a previous schema, quietly upgrade them
 240                         if ( $this->type == -1 ) {
 241                                 $this->upgradeRow();
 242                         }
 243                 } elseif ( $wgUseSharedUploads && $wgSharedUploadDBname ) {
 244                         # In case we're on a wgCapitalLinks=false wiki, we
 245                         # capitalize the first letter of the filename before
 246                         # looking it up in the shared repository.
 247                         $name = $wgLang->ucfirst($this->name);
 248
 249                         $row = $dbr->selectRow( "`$wgSharedUploadDBname`.image",
 250                                 array( 'img_size', 'img_width', 'img_height', 'img_bits', 'img_type' ),
 251                                 array( 'img_name' => $name ), $fname );
 252                         if ( $row ) {
 253                                 $this->fromSharedDirectory = true;
 254                                 $this->fileExists = true;
 255                                 $this->imagePath = $this->getFullPath(true);
 256                                 $this->name = $name;
 257                                 $this->loadFromRow( $row );
 258
 259                                 // Check for rows from a previous schema, quietly upgrade them
 260                                 if ( $this->type == -1 ) {
 261                                         $this->upgradeRow();
 262                                 }
 263                         }
 264                 }
 265
 266                 if ( !$row ) {
 267                         $this->size = 0;
 268                         $this->width = 0;
 269                         $this->height = 0;
 270                         $this->bits = 0;
 271                         $this->type = 0;
 272                         $this->fileExists = false;
 273                         $this->fromSharedDirectory = false;
 274                 }
 275
 276                 # Unconditionally set loaded=true, we don't want the accessors constantly rechecking
 277                 $this->dataLoaded = true;
 278         }
 279
 280         /*
 281          * Load image metadata from a DB result row
 282          */
 283         function loadFromRow( &$row ) {
 284                 $this->size = $row->img_size;
 285                 $this->width = $row->img_width;
 286                 $this->height = $row->img_height;
 287                 $this->bits = $row->img_bits;
 288                 $this->type = $row->img_type;
 289                 $this->dataLoaded = true;
 290         }
 291
 292         /**
 293          * Load image metadata from cache or DB, unless already loaded
 294          */
 295         function load() {
 296                 global $wgSharedUploadDBname, $wgUseSharedUploads;
 297                 if ( !$this->dataLoaded ) {
 298                         if ( !$this->loadFromCache() ) {
 299                                 $this->loadFromDB();
 300                                 if ( !$wgSharedUploadDBname && $wgUseSharedUploads ) {
 301                                         $this->loadFromFile();
 302                                 } elseif ( $this->fileExists ) {
 303                                         $this->saveToCache();
 304                                 }
 305                         }
 306                         $this->dataLoaded = true;
 307                 }
 308         }
 309
 310         /**
 311          * Metadata was loaded from the database, but the row had a marker indicating it needs to be
 312          * upgraded from the 1.4 schema, which had no width, height, bits or type. Upgrade the row.
 313          */
 314         function upgradeRow() {
 315                 global $wgDBname, $wgSharedUploadDBname;
 316                 $fname = 'Image::upgradeRow';
 317                 $this->loadFromFile();
 318                 $dbw =& wfGetDB( DB_MASTER );
 319
 320                 if ( $this->fromSharedDirectory ) {
 321                         if ( !$wgSharedUploadDBname ) {
 322                                 return;
 323                         }
 324
 325                         // Write to the other DB using selectDB, not database selectors
 326                         // This avoids breaking replication in MySQL
 327                         $dbw->selectDB( $wgSharedUploadDBname );
 328                 }
 329                 $dbw->update( '`image`',
 330                         array(
 331                                 'img_width' => $this->width,
 332                                 'img_height' => $this->height,
 333                                 'img_bits' => $this->bits,
 334                                 'img_type' => $this->type,
 335                         ), array( 'img_name' => $this->name ), $fname
 336                 );
 337                 if ( $this->fromSharedDirectory ) {
 338                         $dbw->selectDB( $wgDBname );
 339                 }
 340         }
 341
 342         /**
 343          * Return the name of this image
 344          * @access public
 345          */
 346         function getName() {
 347                 return $this->name;
 348         }
 349
 350         /**
 351          * Return the associated title object
 352          * @access public
 353          */
 354         function getTitle() {
 355                 return $this->title;
 356         }
 357
 358         /**
 359          * Return the URL of the image file
 360          * @access public
 361          */
 362         function getURL() {
 363                 if ( !$this->url ) {
 364                         $this->load();
 365                         if($this->fileExists) {
 366                                 $this->url = Image::imageUrl( $this->name, $this->fromSharedDirectory );
 367                         } else {
 368                                 $this->url = '';
 369                         }
 370                 }
 371                 return $this->url;
 372         }
 373
 374         function getViewURL() {
 375                 if( $this->mustRender() ) {
 376                         return $this->createThumb( $this->getWidth() );
 377                 } else {
 378                         return $this->getURL();
 379                 }
 380         }
 381
 382         /**
 383          * Return the image path of the image in the
 384          * local file system as an absolute path
 385          * @access public
 386          */
 387         function getImagePath() {
 388                 $this->load();
 389                 return $this->imagePath;
 390         }
 391
 392         /**
 393          * Return the width of the image
 394          *
 395          * Returns -1 if the file specified is not a known image type
 396          * @access public
 397          */
 398         function getWidth() {
 399                 $this->load();
 400                 return $this->width;
 401         }
 402
 403         /**
 404          * Return the height of the image
 405          *
 406          * Returns -1 if the file specified is not a known image type
 407          * @access public
 408          */
 409         function getHeight() {
 410                 $this->load();
 411                 return $this->height;
 412         }
 413
 414         /**
 415          * Return the size of the image file, in bytes
 416          * @access public
 417          */
 418         function getSize() {
 419                 $this->load();
 420                 return $this->size;
 421         }
 422
 423         /**
 424          * Return the type of the image
 425          *
 426          * -  1 GIF
 427          * -  2 JPG
 428          * -  3 PNG
 429          * - 15 WBMP
 430          * - 16 XBM
 431          */
 432         function getType() {
 433                 $this->load();
 434                 return $this->type;
 435         }
 436
 437         /**
 438          * Return the escapeLocalURL of this image
 439          * @access public
 440          */
 441         function getEscapeLocalURL() {
 442                 $this->getTitle();
 443                 return $this->title->escapeLocalURL();
 444         }
 445
 446         /**
 447          * Return the escapeFullURL of this image
 448          * @access public
 449          */
 450         function getEscapeFullURL() {
 451                 $this->getTitle();
 452                 return $this->title->escapeFullURL();
 453         }
 454
 455         /**
 456          * Return the URL of an image, provided its name.
 457          *
 458          * @param string $name  Name of the image, without the leading "Image:"
 459          * @param boolean $fromSharedDirectory  Should this be in $wgSharedUploadPath?
 460          * @access public
 461          * @static
 462          */
 463         function imageUrl( $name, $fromSharedDirectory = false ) {
 464                 global $wgUploadPath,$wgUploadBaseUrl,$wgSharedUploadPath;
 465                 if($fromSharedDirectory) {
 466                         $base = '';
 467                         $path = $wgSharedUploadPath;
 468                 } else {
 469                         $base = $wgUploadBaseUrl;
 470                         $path = $wgUploadPath;
 471                 }
 472                 $url = "{$base}{$path}" .  wfGetHashPath($name, $fromSharedDirectory) . "{$name}";
 473                 return wfUrlencode( $url );
 474         }
 475
 476         /**
 477          * Returns true if the image file exists on disk.
 478          *
 479          * @access public
 480          */
 481         function exists() {
 482                 $this->load();
 483                 return $this->fileExists;
 484         }
 485
 486         /**
 487          *
 488          * @access private
 489          */
 490         function thumbUrl( $width, $subdir='thumb') {
 491                 global $wgUploadPath, $wgUploadBaseUrl,
 492                        $wgSharedUploadPath,$wgSharedUploadDirectory,
 493                            $wgSharedThumbnailScriptPath, $wgThumbnailScriptPath;
 494
 495                 // Generate thumb.php URL if possible
 496                 $script = false;
 497                 $url = false;
 498
 499                 if ( $this->fromSharedDirectory ) {
 500                         if ( $wgSharedThumbnailScriptPath ) {
 501                                 $script = $wgSharedThumbnailScriptPath;
 502                         }
 503                 } else {
 504                         if ( $wgThumbnailScriptPath ) {
 505                                 $script = $wgThumbnailScriptPath;
 506                         }
 507                 }
 508                 if ( $script ) {
 509                         $url = $script . '?f=' . urlencode( $this->name ) . '&w=' . urlencode( $width );
 510                 } else {
 511                         $name = $this->thumbName( $width );
 512                         if($this->fromSharedDirectory) {
 513                                 $base = '';
 514                                 $path = $wgSharedUploadPath;
 515                         } else {
 516                                 $base = $wgUploadBaseUrl;
 517                                 $path = $wgUploadPath;
 518                         }
 519                         $url = "{$base}{$path}/{$subdir}" .
 520                         wfGetHashPath($this->name, $this->fromSharedDirectory)
 521                         . $this->name.'/'.$name;
 522                         $url = wfUrlencode( $url );
 523                 }
 524                 return array( $script !== false, $url );
 525         }
 526
 527         /**
 528          * Return the file name of a thumbnail of the specified width
 529          *
 530          * @param integer $width        Width of the thumbnail image
 531          * @param boolean $shared       Does the thumbnail come from the shared repository?
 532          * @access private
 533          */
 534         function thumbName( $width ) {
 535                 $thumb = $width."px-".$this->name;
 536                 if( $this->extension == 'svg' ) {
 537                         # Rasterize SVG vector images to PNG
 538                         $thumb .= '.png';
 539                 }
 540                 return $thumb;
 541         }
 542
 543         /**
 544          * Create a thumbnail of the image having the specified width/height.
 545          * The thumbnail will not be created if the width is larger than the
 546          * image's width. Let the browser do the scaling in this case.
 547          * The thumbnail is stored on disk and is only computed if the thumbnail
 548          * file does not exist OR if it is older than the image.
 549          * Returns the URL.
 550          *
 551          * Keeps aspect ratio of original image. If both width and height are
 552          * specified, the generated image will be no bigger than width x height,
 553          * and will also have correct aspect ratio.
 554          *
 555          * @param integer $width        maximum width of the generated thumbnail
 556          * @param integer $height       maximum height of the image (optional)
 557          * @access public
 558          */
 559         function createThumb( $width, $height=-1 ) {
 560                 $thumb = $this->getThumbnail( $width, $height );
 561                 if( is_null( $thumb ) ) return '';
 562                 return $thumb->getUrl();
 563         }
 564
 565         /**
 566          * As createThumb, but returns a ThumbnailImage object. This can
 567          * provide access to the actual file, the real size of the thumb,
 568          * and can produce a convenient <img> tag for you.
 569          *
 570          * @param integer $width        maximum width of the generated thumbnail
 571          * @param integer $height       maximum height of the image (optional)
 572          * @return ThumbnailImage
 573          * @access public
 574          */
 575         function &getThumbnail( $width, $height=-1 ) {
 576                 if ( $height == -1 ) {
 577                         return $this->renderThumb( $width );
 578                 }
 579                 $this->load();
 580                 if ( $width < $this->width ) {
 581                         $thumbheight = $this->height * $width / $this->width;
 582                         $thumbwidth = $width;
 583                 } else {
 584                         $thumbheight = $this->height;
 585                         $thumbwidth = $this->width;
 586                 }
 587                 if ( $thumbheight > $height ) {
 588                         $thumbwidth = $thumbwidth * $height / $thumbheight;
 589                         $thumbheight = $height;
 590                 }
 591                 $thumb = $this->renderThumb( $thumbwidth );
 592                 if( is_null( $thumb ) ) {
 593                         $thumb = $this->iconThumb();
 594                 }
 595                 return $thumb;
 596         }
 597
 598         /**
 599          * @return ThumbnailImage
 600          */
 601         function iconThumb() {
 602                 global $wgStylePath, $wgStyleDirectory;
 603
 604                 $try = array( 'fileicon-' . $this->extension . '.png', 'fileicon.png' );
 605                 foreach( $try as $icon ) {
 606                         $path = '/common/images/' . $icon;
 607                         $filepath = $wgStyleDirectory . $path;
 608                         if( file_exists( $filepath ) ) {
 609                                 return new ThumbnailImage( $wgStylePath . $path, 120, 120 );
 610                         }
 611                 }
 612                 return null;
 613         }
 614
 615         /**
 616          * Create a thumbnail of the image having the specified width.
 617          * The thumbnail will not be created if the width is larger than the
 618          * image's width. Let the browser do the scaling in this case.
 619          * The thumbnail is stored on disk and is only computed if the thumbnail
 620          * file does not exist OR if it is older than the image.
 621          * Returns an object which can return the pathname, URL, and physical
 622          * pixel size of the thumbnail -- or null on failure.
 623          *
 624          * @return ThumbnailImage
 625          * @access private
 626          */
 627         function /* private */ renderThumb( $width, $useScript = true ) {
 628                 global $wgUseSquid, $wgInternalServer;
 629                 global $wgThumbnailScriptPath, $wgSharedThumbnailScriptPath;
 630
 631                 $width = IntVal( $width );
 632
 633                 $this->load();
 634                 if ( ! $this->exists() )
 635                 {
 636                         # If there is no image, there will be no thumbnail
 637                         return null;
 638                 }
 639
 640                 # Sanity check $width
 641                 if( $width <= 0 ) {
 642                         # BZZZT
 643                         return null;
 644                 }
 645
 646                 if( $width > $this->width && !$this->mustRender() ) {
 647                         # Don't make an image bigger than the source
 648                         return new ThumbnailImage( $this->getViewURL(), $this->getWidth(), $this->getHeight() );
 649                 }
 650
 651                 $height = floor( $this->height * ( $width/$this->width ) );
 652
 653                 list( $isScriptUrl, $url ) = $this->thumbUrl( $width );
 654                 if ( $isScriptUrl && $useScript ) {
 655                         // Use thumb.php to render the image
 656                         return new ThumbnailImage( $url, $width, $height );
 657                 }
 658
 659                 $thumbName = $this->thumbName( $width, $this->fromSharedDirectory );
 660                 $thumbPath = wfImageThumbDir( $this->name, $this->fromSharedDirectory ).'/'.$thumbName;
 661
 662                 if ( !file_exists( $thumbPath ) ) {
 663                         $oldThumbPath = wfDeprecatedThumbDir( $thumbName, 'thumb', $this->fromSharedDirectory ).
 664                                 '/'.$thumbName;
 665                         $done = false;
 666                         if ( file_exists( $oldThumbPath ) ) {
 667                                 if ( filemtime($oldThumbPath) >= filemtime($this->imagePath) ) {
 668                                         rename( $oldThumbPath, $thumbPath );
 669                                         $done = true;
 670                                 } else {
 671                                         unlink( $oldThumbPath );
 672                                 }
 673                         }
 674                         if ( !$done ) {
 675                                 $this->reallyRenderThumb( $thumbPath, $width, $height );
 676
 677                                 # Purge squid
 678                                 # This has to be done after the image is updated and present for all machines on NFS,
 679                                 # or else the old version might be stored into the squid again
 680                                 if ( $wgUseSquid ) {
 681                                         if ( substr( $url, 0, 4 ) == 'http' ) {
 682                                                 $urlArr = array( $url );
 683                                         } else {
 684                                                 $urlArr = array( $wgInternalServer.$url );
 685                                         }
 686                                         wfPurgeSquidServers($urlArr);
 687                                 }
 688                         }
 689                 }
 690                 return new ThumbnailImage( $url, $width, $height, $thumbPath );
 691         } // END OF function renderThumb
 692
 693         /**
 694          * Really render a thumbnail
 695          *
 696          * @access private
 697          */
 698         function /*private*/ reallyRenderThumb( $thumbPath, $width, $height ) {
 699                 global $wgSVGConverters, $wgSVGConverter,
 700                         $wgUseImageMagick, $wgImageMagickConvertCommand;
 701
 702                 $this->load();
 703
 704                 if( $this->extension == 'svg' ) {
 705                         global $wgSVGConverters, $wgSVGConverter;
 706                         if( isset( $wgSVGConverters[$wgSVGConverter] ) ) {
 707                                 global $wgSVGConverterPath;
 708                                 $cmd = str_replace(
 709                                         array( '$path/', '$width', '$input', '$output' ),
 710                                         array( $wgSVGConverterPath,
 711                                                    $width,
 712                                                    escapeshellarg( $this->imagePath ),
 713                                                    escapeshellarg( $thumbPath ) ),
 714                                         $wgSVGConverters[$wgSVGConverter] );
 715                                 $conv = shell_exec( $cmd );
 716                         } else {
 717                                 $conv = false;
 718                         }
 719                 } elseif ( $wgUseImageMagick ) {
 720                         # use ImageMagick
 721                         # Specify white background color, will be used for transparent images
 722                         # in Internet Explorer/Windows instead of default black.
 723                         $cmd  =  $wgImageMagickConvertCommand .
 724                                 " -quality 85 -background white -geometry {$width} ".
 725                                 escapeshellarg($this->imagePath) . " " .
 726                                 escapeshellarg($thumbPath);
 727                         $conv = shell_exec( $cmd );
 728                 } else {
 729                         # Use PHP's builtin GD library functions.
 730                         #
 731                         # First find out what kind of file this is, and select the correct
 732                         # input routine for this.
 733
 734                         $truecolor = false;
 735
 736                         switch( $this->type ) {
 737                                 case 1: # GIF
 738                                         $src_image = imagecreatefromgif( $this->imagePath );
 739                                         break;
 740                                 case 2: # JPG
 741                                         $src_image = imagecreatefromjpeg( $this->imagePath );
 742                                         $truecolor = true;
 743                                         break;
 744                                 case 3: # PNG
 745                                         $src_image = imagecreatefrompng( $this->imagePath );
 746                                         $truecolor = ( $this->bits > 8 );
 747                                         break;
 748                                 case 15: # WBMP for WML
 749                                         $src_image = imagecreatefromwbmp( $this->imagePath );
 750                                         break;
 751                                 case 16: # XBM
 752                                         $src_image = imagecreatefromxbm( $this->imagePath );
 753                                         break;
 754                                 default:
 755                                         return 'Image type not supported';
 756                                         break;
 757                         }
 758                         if ( $truecolor ) {
 759                                 $dst_image = imagecreatetruecolor( $width, $height );
 760                         } else {
 761                                 $dst_image = imagecreate( $width, $height );
 762                         }
 763                         imagecopyresampled( $dst_image, $src_image,
 764                                                 0,0,0,0,
 765                                                 $width, $height, $this->width, $this->height );
 766                         switch( $this->type ) {
 767                                 case 1:  # GIF
 768                                 case 3:  # PNG
 769                                 case 15: # WBMP
 770                                 case 16: # XBM
 771                                         imagepng( $dst_image, $thumbPath );
 772                                         break;
 773                                 case 2:  # JPEG
 774                                         imageinterlace( $dst_image );
 775                                         imagejpeg( $dst_image, $thumbPath, 95 );
 776                                         break;
 777                                 default:
 778                                         break;
 779                         }
 780                         imagedestroy( $dst_image );
 781                         imagedestroy( $src_image );
 782                 }
 783                 #
 784                 # Check for zero-sized thumbnails. Those can be generated when
 785                 # no disk space is available or some other error occurs
 786                 #
 787                 if( file_exists( $thumbPath ) ) {
 788                         $thumbstat = stat( $thumbPath );
 789                         if( $thumbstat['size'] == 0 ) {
 790                                 unlink( $thumbPath );
 791                         }
 792                 }
 793         }
 794
 795         /**
 796          * Get all thumbnail names previously generated for this image
 797          */
 798         function getThumbnails( $shared = false ) {
 799                 $this->load();
 800                 $files = array();
 801                 $dir = wfImageThumbDir( $this->name, $shared );
 802
 803                 // This generates an error on failure, hence the @
 804                 $handle = @opendir( $dir );
 805
 806                 if ( $handle ) {
 807                         while ( false !== ( $file = readdir($handle) ) ) {
 808                                 if ( $file{0} != '.' ) {
 809                                         $files[] = $file;
 810                                 }
 811                         }
 812                         closedir( $handle );
 813                 }
 814
 815                 return $files;
 816         }
 817
 818         /**
 819          * Delete all previously generated thumbnails, refresh metadata in memcached and purge the squid
 820          */
 821         function purgeCache( $archiveFiles = array(), $shared = false ) {
 822                 global $wgInternalServer, $wgUseSquid;
 823
 824                 // Refresh metadata cache
 825                 clearstatcache();
 826                 $this->loadFromFile();
 827                 $this->saveToCache();
 828
 829                 // Delete thumbnails
 830                 $files = $this->getThumbnails( $shared );
 831                 $dir = wfImageThumbDir( $this->name, $shared );
 832                 $urls = array();
 833                 foreach ( $files as $file ) {
 834                         if ( preg_match( '/^(\d+)px/', $file, $m ) ) {
 835                                 $urls[] = $wgInternalServer . $this->thumbUrl( $m[1], $this->fromSharedDirectory );
 836                                 @unlink( "$dir/$file" );
 837                         }
 838                 }
 839
 840                 // Purge the squid
 841                 if ( $wgUseSquid ) {
 842                         $urls[] = $wgInternalServer . $this->getViewURL();
 843                         foreach ( $archiveFiles as $file ) {
 844                                 $urls[] = $wgInternalServer . wfImageArchiveUrl( $file );
 845                         }
 846                         wfPurgeSquidServers( $urls );
 847                 }
 848         }
 849
 850         /**
 851          * Return the image history of this image, line by line.
 852          * starts with current version, then old versions.
 853          * uses $this->historyLine to check which line to return:
 854          *  0      return line for current version
 855          *  1      query for old versions, return first one
 856          *  2, ... return next old version from above query
 857          *
 858          * @access public
 859          */
 860         function nextHistoryLine() {
 861                 $fname = 'Image::nextHistoryLine()';
 862                 $dbr =& wfGetDB( DB_SLAVE );
 863                 if ( $this->historyLine == 0 ) {// called for the first time, return line from cur
 864                         $this->historyRes = $dbr->select( 'image',
 865                                 array( 'img_size','img_description','img_user','img_user_text','img_timestamp', "'' AS oi_archive_name" ),
 866                                 array( 'img_name' => $this->title->getDBkey() ),
 867                                 $fname
 868                         );
 869                         if ( 0 == wfNumRows( $this->historyRes ) ) {
 870                                 return FALSE;
 871                         }
 872                 } else if ( $this->historyLine == 1 ) {
 873                         $this->historyRes = $dbr->select( 'oldimage',
 874                                 array( 'oi_size AS img_size', 'oi_description AS img_description', 'oi_user AS img_user',
 875                                         'oi_user_text AS img_user_text', 'oi_timestamp AS img_timestamp', 'oi_archive_name'
 876                                 ), array( 'oi_name' => $this->title->getDBkey() ), $fname, array( 'ORDER BY' => 'oi_timestamp DESC' )
 877                         );
 878                 }
 879                 $this->historyLine ++;
 880
 881                 return $dbr->fetchObject( $this->historyRes );
 882         }
 883
 884         /**
 885          * Reset the history pointer to the first element of the history
 886          * @access public
 887          */
 888         function resetHistory() {
 889                 $this->historyLine = 0;
 890         }
 891
 892         /**
 893          * Return true if the file is of a type that can't be directly
 894          * rendered by typical browsers and needs to be re-rasterized.
 895          * @return bool
 896          */
 897         function mustRender() {
 898                 $this->load();
 899                 return ( $this->extension == 'svg' );
 900         }
 901
 902         /**
 903         * Return the full filesystem path to the file. Note that this does
 904         * not mean that a file actually exists under that location.
 905         *
 906         * This path depends on whether directory hashing is active or not,
 907         * i.e. whether the images are all found in the same directory,
 908         * or in hashed paths like /images/3/3c.
 909         *
 910         * @access public
 911         * @param boolean $fromSharedDirectory Return the path to the file
 912         *   in a shared repository (see $wgUseSharedRepository and related
 913         *   options in DefaultSettings.php) instead of a local one.
 914         *
 915         */
 916         function getFullPath( $fromSharedRepository = false ) {
 917                 global $wgUploadDirectory, $wgSharedUploadDirectory;
 918                 global $wgHashedUploadDirectory, $wgHashedSharedUploadDirectory;
 919
 920                 $dir      = $fromSharedRepository ? $wgSharedUploadDirectory :
 921                                                     $wgUploadDirectory;
 922
 923                 // $wgSharedUploadDirectory may be false, if thumb.php is used
 924                 if ( $dir ) {
 925                         $fullpath = $dir . wfGetHashPath($this->name, $fromSharedRepository) . $this->name;
 926                 } else {
 927                         $fullpath = false;
 928                 }
 929
 930                 return $fullpath;
 931         }
 932
 933         /**
 934          * @return bool
 935          * @static
 936          */
 937         function isKnownImageExtension( $ext ) {
 938                 static $extensions = array( 'svg', 'png', 'jpg', 'jpeg', 'gif', 'bmp', 'xbm' );
 939                 return in_array( $ext, $extensions );
 940         }
 941
 942         /**
 943          * Record an image upload in the upload log and the image table
 944          */
 945         function recordUpload( $oldver, $desc, $copyStatus = '', $source = '' ) {
 946                 global $wgUser, $wgLang, $wgTitle, $wgOut, $wgDeferredUpdateList;
 947                 global $wgUseCopyrightUpload, $wgUseSquid, $wgPostCommitUpdateList;
 948
 949                 $fname = 'Image::recordUpload';
 950                 $dbw =& wfGetDB( DB_MASTER );
 951
 952                 # img_name must be unique
 953                 if ( !$dbw->indexUnique( 'image', 'img_name' ) && !$dbw->indexExists('image','PRIMARY') ) {
 954                         wfDebugDieBacktrace( 'Database schema not up to date, please run maintenance/archives/patch-image_name_unique.sql' );
 955                 }
 956
 957                 // Delete thumbnails and refresh the metadata cache
 958                 $this->purgeCache();
 959
 960                 // Fail now if the image isn't there
 961                 if ( !$this->fileExists || $this->fromSharedDirectory ) {
 962                         return false;
 963                 }
 964
 965                 if ( $wgUseCopyrightUpload ) {
 966                         $textdesc = '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $desc . "\n" .
 967                           '== ' . wfMsg ( 'filestatus' ) . " ==\n" . $copyStatus . "\n" .
 968                           '== ' . wfMsg ( 'filesource' ) . " ==\n" . $source ;
 969                 } else {
 970                         $textdesc = $desc;
 971                 }
 972
 973                 $now = $dbw->timestamp();
 974
 975                 # Test to see if the row exists using INSERT IGNORE
 976                 # This avoids race conditions by locking the row until the commit, and also
 977                 # doesn't deadlock. SELECT FOR UPDATE causes a deadlock for every race condition.
 978                 $dbw->insert( 'image',
 979                         array(
 980                                 'img_name' => $this->name,
 981                                 'img_size'=> $this->size,
 982                                 'img_width' => $this->width,
 983                                 'img_height' => $this->height,
 984                                 'img_bits' => $this->bits,
 985                                 'img_type' => $this->type,
 986                                 'img_timestamp' => $now,
 987                                 'img_description' => $desc,
 988                                 'img_user' => $wgUser->getID(),
 989                                 'img_user_text' => $wgUser->getName(),
 990                         ), $fname, 'IGNORE'
 991                 );
 992                 $descTitle = $this->getTitle();
 993                 $purgeURLs = array();
 994
 995                 if ( $dbw->affectedRows() ) {
 996                         # Successfully inserted, this is a new image
 997                         $id = $descTitle->getArticleID();
 998
 999                         if ( $id == 0 ) {
1000                                 $article = new Article( $descTitle );
1001                                 $article->insertNewArticle( $textdesc, $desc, false, false, true );
1002                         }
1003                 } else {
1004                         # Collision, this is an update of an image
1005                         # Insert previous contents into oldimage
1006                         $dbw->insertSelect( 'oldimage', 'image',
1007                                 array(
1008                                         'oi_name' => 'img_name',
1009                                         'oi_archive_name' => $dbw->addQuotes( $oldver ),
1010                                         'oi_size' => 'img_size',
1011                                         'oi_width' => 'img_width',
1012                                         'oi_height' => 'img_height',
1013                                         'oi_bits' => 'img_bits',
1014                                         'oi_type' => 'img_type',
1015                                         'oi_timestamp' => 'img_timestamp',
1016                                         'oi_description' => 'img_description',
1017                                         'oi_user' => 'img_user',
1018                                         'oi_user_text' => 'img_user_text',
1019                                 ), array( 'img_name' => $this->name ), $fname
1020                         );
1021
1022                         # Update the current image row
1023                         $dbw->update( 'image',
1024                                 array( /* SET */
1025                                         'img_size' => $this->size,
1026                                         'img_width' => $this->width,
1027                                         'img_height' => $this->height,
1028                                         'img_bits' => $this->bits,
1029                                         'img_type' => $this->type,
1030                                         'img_timestamp' => $now,
1031                                         'img_user' => $wgUser->getID(),
1032                                         'img_user_text' => $wgUser->getName(),
1033                                         'img_description' => $desc,
1034                                 ), array( /* WHERE */
1035                                         'img_name' => $this->name
1036                                 ), $fname
1037                         );
1038
1039                         # Invalidate the cache for the description page
1040                         $descTitle->invalidateCache();
1041                         $purgeURLs[] = $descTitle->getInternalURL();
1042                 }
1043
1044                 # Invalidate cache for all pages using this image
1045                 $linksTo = $this->getLinksTo();
1046
1047                 if ( $wgUseSquid ) {
1048                         $u = SquidUpdate::newFromTitles( $linksTo, $purgeURLs );
1049                         array_push( $wgPostCommitUpdateList, $u );
1050                 }
1051                 Title::touchArray( $linksTo );
1052
1053                 $log = new LogPage( 'upload' );
1054                 $log->addEntry( 'upload', $descTitle, $desc );
1055
1056                 return true;
1057         }
1058
1059         /**
1060          * Get an array of Title objects which are articles which use this image
1061          * Also adds their IDs to the link cache
1062          *
1063          * This is mostly copied from Title::getLinksTo()
1064          */
1065         function getLinksTo( $options = '' ) {
1066                 global $wgLinkCache;
1067                 $fname = 'Image::getLinksTo';
1068                 wfProfileIn( $fname );
1069
1070                 if ( $options ) {
1071                         $db =& wfGetDB( DB_MASTER );
1072                 } else {
1073                         $db =& wfGetDB( DB_SLAVE );
1074                 }
1075
1076                 extract( $db->tableNames( 'page', 'imagelinks' ) );
1077                 $encName = $db->addQuotes( $this->name );
1078                 $sql = "SELECT page_namespace,page_title,page_id FROM $page,$imagelinks WHERE page_id=il_from AND il_to=$encName $options";
1079                 $res = $db->query( $sql, $fname );
1080
1081                 $retVal = array();
1082                 if ( $db->numRows( $res ) ) {
1083                         while ( $row = $db->fetchObject( $res ) ) {
1084                                 if ( $titleObj = Title::makeTitle( $row->page_namespace, $row->page_title ) ) {
1085                                         $wgLinkCache->addGoodLink( $row->page_id, $titleObj->getPrefixedDBkey() );
1086                                         $retVal[] = $titleObj;
1087                                 }
1088                         }
1089                 }
1090                 $db->freeResult( $res );
1091                 return $retVal;
1092         }
1093
1094 } //class
1095
1096
1097 /**
1098  * Returns the image directory of an image
1099  * If the directory does not exist, it is created.
1100  * The result is an absolute path.
1101  *
1102  * This function is called from thumb.php before Setup.php is included
1103  *
1104  * @param string $fname         file name of the image file
1105  * @access public
1106  */
1107 function wfImageDir( $fname ) {
1108         global $wgUploadDirectory, $wgHashedUploadDirectory;
1109
1110         if (!$wgHashedUploadDirectory) { return $wgUploadDirectory; }
1111
1112         $hash = md5( $fname );
1113         $oldumask = umask(0);
1114         $dest = $wgUploadDirectory . '/' . $hash{0};
1115         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
1116         $dest .= '/' . substr( $hash, 0, 2 );
1117         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
1118
1119         umask( $oldumask );
1120         return $dest;
1121 }
1122
1123 /**
1124  * Returns the image directory of an image's thubnail
1125  * If the directory does not exist, it is created.
1126  * The result is an absolute path.
1127  *
1128  * This function is called from thumb.php before Setup.php is included
1129  *
1130  * @param string $fname         file name of the original image file
1131  * @param string $subdir        (optional) subdirectory of the image upload directory that should be used for storing the thumbnail. Default is 'thumb'
1132  * @param boolean $shared       (optional) use the shared upload directory
1133  * @access public
1134  */
1135 function wfImageThumbDir( $fname, $shared = false ) {
1136         $base = wfImageArchiveDir( $fname, 'thumb', $shared );
1137         $dir =  "$base/$fname";
1138
1139         if ( !is_dir( $base ) ) {
1140                 $oldumask = umask(0);
1141                 @mkdir( $base, 0777 );
1142                 umask( $oldumask );
1143         }
1144
1145         if ( ! is_dir( $dir ) ) {
1146                 $oldumask = umask(0);
1147                 @mkdir( $dir, 0777 );
1148                 umask( $oldumask );
1149         }
1150
1151         return $dir;
1152 }
1153
1154 /**
1155  * Old thumbnail directory, kept for conversion
1156  */
1157 function wfDeprecatedThumbDir( $thumbName , $subdir='thumb', $shared=false) {
1158         return wfImageArchiveDir( $thumbName, $subdir, $shared );
1159 }
1160
1161 /**
1162  * Returns the image directory of an image's old version
1163  * If the directory does not exist, it is created.
1164  * The result is an absolute path.
1165  *
1166  * This function is called from thumb.php before Setup.php is included
1167  *
1168  * @param string $fname         file name of the thumbnail file, including file size prefix
1169  * @param string $subdir        (optional) subdirectory of the image upload directory that should be used for storing the old version. Default is 'archive'
1170  * @param boolean $shared       (optional) use the shared upload directory (only relevant for other functions which call this one)
1171  * @access public
1172  */
1173 function wfImageArchiveDir( $fname , $subdir='archive', $shared=false ) {
1174         global $wgUploadDirectory, $wgHashedUploadDirectory,
1175                $wgSharedUploadDirectory, $wgHashedSharedUploadDirectory;
1176         $dir = $shared ? $wgSharedUploadDirectory : $wgUploadDirectory;
1177         $hashdir = $shared ? $wgHashedSharedUploadDirectory : $wgHashedUploadDirectory;
1178         if (!$hashdir) { return $dir.'/'.$subdir; }
1179         $hash = md5( $fname );
1180         $oldumask = umask(0);
1181
1182         # Suppress warning messages here; if the file itself can't
1183         # be written we'll worry about it then.
1184         wfSuppressWarnings();
1185
1186         $archive = $dir.'/'.$subdir;
1187         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
1188         $archive .= '/' . $hash{0};
1189         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
1190         $archive .= '/' . substr( $hash, 0, 2 );
1191         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
1192
1193         wfRestoreWarnings();
1194         umask( $oldumask );
1195         return $archive;
1196 }
1197
1198
1199 /*
1200  * Return the hash path component of an image path (URL or filesystem),
1201  * e.g. "/3/3c/", or just "/" if hashing is not used.
1202  *
1203  * @param $dbkey The filesystem / database name of the file
1204  * @param $fromSharedDirectory Use the shared file repository? It may
1205  *   use different hash settings from the local one.
1206  */
1207 function wfGetHashPath ( $dbkey, $fromSharedDirectory = false ) {
1208         global $wgHashedSharedUploadDirectory, $wgSharedUploadDirectory;
1209         global $wgHashedUploadDirectory;
1210
1211         $ishashed = $fromSharedDirectory ? $wgHashedSharedUploadDirectory :
1212                                            $wgHashedUploadDirectory;
1213         if($ishashed) {
1214                 $hash = md5($dbkey);
1215                 return '/' . $hash{0} . '/' . substr( $hash, 0, 2 ) . '/';
1216         } else {
1217                 return '/';
1218         }
1219 }
1220
1221 /**
1222  * Returns the image URL of an image's old version
1223  *
1224  * @param string $fname         file name of the image file
1225  * @param string $subdir        (optional) subdirectory of the image upload directory that is used by the old version. Default is 'archive'
1226  * @access public
1227  */
1228 function wfImageArchiveUrl( $name, $subdir='archive' ) {
1229         global $wgUploadPath, $wgHashedUploadDirectory;
1230
1231         if ($wgHashedUploadDirectory) {
1232                 $hash = md5( substr( $name, 15) );
1233                 $url = $wgUploadPath.'/'.$subdir.'/' . $hash{0} . '/' .
1234                   substr( $hash, 0, 2 ) . '/'.$name;
1235         } else {
1236                 $url = $wgUploadPath.'/'.$subdir.'/'.$name;
1237         }
1238         return wfUrlencode($url);
1239 }
1240
1241 /**
1242  * Return a rounded pixel equivalent for a labeled CSS/SVG length.
1243  * http://www.w3.org/TR/SVG11/coords.html#UnitIdentifiers
1244  *
1245  * @param string $length
1246  * @return int Length in pixels
1247  */
1248 function wfScaleSVGUnit( $length ) {
1249         static $unitLength = array(
1250                 'px' => 1.0,
1251                 'pt' => 1.25,
1252                 'pc' => 15.0,
1253                 'mm' => 3.543307,
1254                 'cm' => 35.43307,
1255                 'in' => 90.0,
1256                 ''   => 1.0, // "User units" pixels by default
1257                 '%'  => 2.0, // Fake it!
1258                 );
1259         if( preg_match( '/^(\d+)(em|ex|px|pt|pc|cm|mm|in|%|)$/', $length, $matches ) ) {
1260                 $length = FloatVal( $matches[1] );
1261                 $unit = $matches[2];
1262                 return round( $length * $unitLength[$unit] );
1263         } else {
1264                 // Assume pixels
1265                 return round( FloatVal( $length ) );
1266         }
1267 }
1268
1269 /**
1270  * Compatible with PHP getimagesize()
1271  * @todo support gzipped SVGZ
1272  * @todo check XML more carefully
1273  * @todo sensible defaults
1274  *
1275  * @param string $filename
1276  * @return array
1277  */
1278 function wfGetSVGsize( $filename ) {
1279         $width = 256;
1280         $height = 256;
1281
1282         // Read a chunk of the file
1283         $f = fopen( $filename, "rt" );
1284         if( !$f ) return false;
1285         $chunk = fread( $f, 4096 );
1286         fclose( $f );
1287
1288         // Uber-crappy hack! Run through a real XML parser.
1289         if( !preg_match( '/<svg\s*([^>]*)\s*>/s', $chunk, $matches ) ) {
1290                 return false;
1291         }
1292         $tag = $matches[1];
1293         if( preg_match( '/\bwidth\s*=\s*("[^"]+"|\'[^\']+\')/s', $tag, $matches ) ) {
1294                 $width = wfScaleSVGUnit( trim( substr( $matches[1], 1, -1 ) ) );
1295         }
1296         if( preg_match( '/\bheight\s*=\s*("[^"]+"|\'[^\']+\')/s', $tag, $matches ) ) {
1297                 $height = wfScaleSVGUnit( trim( substr( $matches[1], 1, -1 ) ) );
1298         }
1299
1300         return array( $width, $height, 'SVG',
1301                 "width=\"$width\" height=\"$height\"" );
1302 }
1303
1304 /**
1305  * Is an image on the bad image list?
1306  */
1307 function wfIsBadImage( $name ) {
1308         global $wgLang;
1309
1310         $lines = explode("\n", wfMsgForContent( 'bad_image_list' ));
1311         foreach ( $lines as $line ) {
1312                 if ( preg_match( '/^\*\s*\[\[:(' . $wgLang->getNsText( NS_IMAGE ) . ':.*(?=]]))\]\]/', $line, $m ) ) {
1313                         $t = Title::newFromText( $m[1] );
1314                         if ( $t->getDBkey() == $name ) {
1315                                 return true;
1316                         }
1317                 }
1318         }
1319         return false;
1320 }
1321
1322
1323
1324 /**
1325  * Wrapper class for thumbnail images
1326  * @package MediaWiki
1327  */
1328 class ThumbnailImage {
1329         /**
1330          * @param string $path Filesystem path to the thumb
1331          * @param string $url URL path to the thumb
1332          * @access private
1333          */
1334         function ThumbnailImage( $url, $width, $height, $path = false ) {
1335                 $this->url = $url;
1336                 $this->width = $width;
1337                 $this->height = $height;
1338                 $this->path = $path;
1339         }
1340
1341         /**
1342          * @return string The thumbnail URL
1343          */
1344         function getUrl() {
1345                 return $this->url;
1346         }
1347
1348         /**
1349          * Return HTML <img ... /> tag for the thumbnail, will include
1350          * width and height attributes and a blank alt text (as required).
1351          *
1352          * You can set or override additional attributes by passing an
1353          * associative array of name => data pairs. The data will be escaped
1354          * for HTML output, so should be in plaintext.
1355          *
1356          * @param array $attribs
1357          * @return string
1358          * @access public
1359          */
1360         function toHtml( $attribs = array() ) {
1361                 $attribs['src'] = $this->url;
1362                 $attribs['width'] = $this->width;
1363                 $attribs['height'] = $this->height;
1364                 if( !isset( $attribs['alt'] ) ) $attribs['alt'] = '';
1365
1366                 $html = '<img ';
1367                 foreach( $attribs as $name => $data ) {
1368                         $html .= $name . '="' . htmlspecialchars( $data ) . '" ';
1369                 }
1370                 $html .= '/>';
1371                 return $html;
1372         }
1373
1374 }
1375 ?>