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| 1 | <?php |
| 2 | /** |
| 3 | * Media-handling base classes and generic functionality. |
| 4 | * |
| 5 | * @license GPL-2.0-or-later |
| 6 | * @file |
| 7 | * @ingroup Media |
| 8 | */ |
| 9 | |
| 10 | namespace MediaWiki\Media; |
| 11 | |
| 12 | use MediaWiki\FileRepo\File\File; |
| 13 | use MediaWiki\MainConfigNames; |
| 14 | use MediaWiki\MediaWikiServices; |
| 15 | |
| 16 | /** |
| 17 | * Media handler abstract base class for images |
| 18 | * |
| 19 | * @stable to extend |
| 20 | * |
| 21 | * @ingroup Media |
| 22 | */ |
| 23 | abstract class ImageHandler extends MediaHandler { |
| 24 | /** |
| 25 | * @inheritDoc |
| 26 | * @stable to override |
| 27 | * @param File $file |
| 28 | * @return bool |
| 29 | */ |
| 30 | public function canRender( $file ) { |
| 31 | return ( $file->getWidth() && $file->getHeight() ); |
| 32 | } |
| 33 | |
| 34 | /** |
| 35 | * @inheritDoc |
| 36 | * @stable to override |
| 37 | * @return array<string,string> |
| 38 | */ |
| 39 | public function getParamMap() { |
| 40 | return [ 'img_width' => 'width' ]; |
| 41 | } |
| 42 | |
| 43 | /** |
| 44 | * @inheritDoc |
| 45 | * @stable to override |
| 46 | */ |
| 47 | public function validateParam( $name, $value ) { |
| 48 | return in_array( $name, [ 'width', 'height' ] ) && (int)$value > 0; |
| 49 | } |
| 50 | |
| 51 | /** |
| 52 | * @inheritDoc |
| 53 | * @stable to override |
| 54 | * @throws MediaTransformInvalidParametersException |
| 55 | */ |
| 56 | public function makeParamString( $params ) { |
| 57 | if ( isset( $params['physicalWidth'] ) ) { |
| 58 | $width = $params['physicalWidth']; |
| 59 | } elseif ( isset( $params['width'] ) ) { |
| 60 | $width = $params['width']; |
| 61 | } else { |
| 62 | throw new MediaTransformInvalidParametersException( 'No width specified to ' . __METHOD__ ); |
| 63 | } |
| 64 | |
| 65 | # Removed for ProofreadPage |
| 66 | # $width = intval( $width ); |
| 67 | return "{$width}px"; |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * @inheritDoc |
| 72 | * @stable to override |
| 73 | */ |
| 74 | public function parseParamString( $str ) { |
| 75 | $m = false; |
| 76 | if ( preg_match( '/^(\d+)px$/', $str, $m ) ) { |
| 77 | return [ 'width' => $m[1] ]; |
| 78 | } |
| 79 | return false; |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * @stable to override |
| 84 | * @param array $params |
| 85 | * @return array |
| 86 | */ |
| 87 | protected function getScriptParams( $params ) { |
| 88 | return [ 'width' => $params['width'] ]; |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * @inheritDoc |
| 93 | * @stable to override |
| 94 | * @param File $image |
| 95 | * @param array &$params @phan-ignore-reference |
| 96 | * @return bool |
| 97 | * @phan-assert array{width:int,physicalWidth:int,height:int,physicalHeight:int,page:int} $params |
| 98 | */ |
| 99 | public function normaliseParams( $image, &$params ) { |
| 100 | if ( !isset( $params['width'] ) ) { |
| 101 | return false; |
| 102 | } |
| 103 | |
| 104 | if ( !isset( $params['page'] ) ) { |
| 105 | $params['page'] = 1; |
| 106 | } else { |
| 107 | $params['page'] = (int)$params['page']; |
| 108 | if ( $params['page'] > $image->pageCount() ) { |
| 109 | $params['page'] = $image->pageCount(); |
| 110 | } |
| 111 | |
| 112 | if ( $params['page'] < 1 ) { |
| 113 | $params['page'] = 1; |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | $srcWidth = $image->getWidth( $params['page'] ); |
| 118 | $srcHeight = $image->getHeight( $params['page'] ); |
| 119 | |
| 120 | if ( isset( $params['height'] ) && $params['height'] !== -1 ) { |
| 121 | # Height & width were both set |
| 122 | if ( $params['width'] * $srcHeight > $params['height'] * $srcWidth ) { |
| 123 | # Height is the relative smaller dimension, so scale width accordingly |
| 124 | $params['width'] = self::fitBoxWidth( $srcWidth, $srcHeight, $params['height'] ); |
| 125 | |
| 126 | if ( $params['width'] == 0 ) { |
| 127 | # Very small image, so we need to rely on client side scaling :( |
| 128 | $params['width'] = 1; |
| 129 | } |
| 130 | |
| 131 | $params['physicalWidth'] = $params['width']; |
| 132 | } else { |
| 133 | # Height was crap, unset it so that it will be calculated later |
| 134 | unset( $params['height'] ); |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | if ( !isset( $params['physicalWidth'] ) ) { |
| 139 | # Passed all validations, so set the physicalWidth |
| 140 | $params['physicalWidth'] = $params['width']; |
| 141 | } |
| 142 | |
| 143 | # Because thumbs are only referred to by width, the height always needs |
| 144 | # to be scaled by the width to keep the thumbnail sizes consistent, |
| 145 | # even if it was set inside the if block above |
| 146 | $params['physicalHeight'] = File::scaleHeight( $srcWidth, $srcHeight, |
| 147 | $params['physicalWidth'] ); |
| 148 | |
| 149 | # Set the height if it was not validated in the if block higher up |
| 150 | if ( !isset( $params['height'] ) || $params['height'] === -1 ) { |
| 151 | $params['height'] = $params['physicalHeight']; |
| 152 | } |
| 153 | |
| 154 | if ( !$this->validateThumbParams( $params['physicalWidth'], |
| 155 | $params['physicalHeight'], $srcWidth, $srcHeight ) |
| 156 | ) { |
| 157 | return false; |
| 158 | } |
| 159 | |
| 160 | return true; |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * Adjust the thumbnail size to fit the width steps defined in config via |
| 165 | * $wgThumbnailSteps. |
| 166 | * |
| 167 | * This logic is duplicated client-side in mw.util.adjustThumbWidthForSteps. |
| 168 | * |
| 169 | * @see FileTest::testThumbNameSteps |
| 170 | * @since 1.46 (also backported to 1.43.7, 1.44.4, 1.45.2) |
| 171 | */ |
| 172 | protected function getSteppedThumbWidth( |
| 173 | File $image, int $requestWidth, int $srcWidth, int $srcHeight |
| 174 | ): int { |
| 175 | $mainConfig = MediaWikiServices::getInstance()->getMainConfig(); |
| 176 | $thumbnailSteps = $mainConfig->get( MainConfigNames::ThumbnailSteps ); |
| 177 | |
| 178 | if ( !$thumbnailSteps ) { |
| 179 | return $requestWidth; |
| 180 | } |
| 181 | |
| 182 | $prevStep = $thumbnailSteps[0]; |
| 183 | foreach ( $thumbnailSteps as $widthStep ) { |
| 184 | if ( ( $widthStep > $srcWidth ) && !$image->isVectorized() ) { |
| 185 | if ( $this->mustRender( $image ) ) { |
| 186 | // Not web-safe: Round down to previous step |
| 187 | // |
| 188 | // While unlikely, this tries to upscale an original that is smaller than the smallest step |
| 189 | // (e.g. smaller than 20px if that's the smallest step configured), which is disallowed |
| 190 | // by default in MediaWiki core with HTTP 400 (ThumbnailEntryPoint::generateThumbnail). |
| 191 | return $prevStep; |
| 192 | } else { |
| 193 | // Web-safe: Round up or down and use the original |
| 194 | // |
| 195 | // There was no step between the requested width and the original width |
| 196 | // (so either a thumb between penultimate step and original, |
| 197 | // or a thumb beyond original jpg but under penultimate step). |
| 198 | // |
| 199 | // NOTE: This thumb-at-original-width is replaced with the original |
| 200 | // in a higher-level code path after this method runs. |
| 201 | return $srcWidth; |
| 202 | } |
| 203 | } |
| 204 | if ( $widthStep == $requestWidth ) { |
| 205 | return $requestWidth; |
| 206 | } |
| 207 | if ( $widthStep > $requestWidth ) { |
| 208 | return $widthStep; |
| 209 | } |
| 210 | $prevStep = $widthStep; |
| 211 | } |
| 212 | |
| 213 | // Respond with the largest step if it's too big. |
| 214 | return $prevStep; |
| 215 | } |
| 216 | |
| 217 | /** |
| 218 | * Validate thumbnail parameters and fill in the correct height |
| 219 | * |
| 220 | * @param int &$width Specified width (input/output) |
| 221 | * @param int &$height Height (output only) |
| 222 | * @param int $srcWidth Width of the source image |
| 223 | * @param int $srcHeight Height of the source image |
| 224 | * @return bool False to indicate that an error should be returned to the user. |
| 225 | */ |
| 226 | private function validateThumbParams( &$width, &$height, $srcWidth, $srcHeight ) { |
| 227 | $width = (int)$width; |
| 228 | |
| 229 | if ( $width <= 0 ) { |
| 230 | wfDebug( __METHOD__ . ": Invalid destination width: $width" ); |
| 231 | |
| 232 | return false; |
| 233 | } |
| 234 | if ( $srcWidth <= 0 ) { |
| 235 | wfDebug( __METHOD__ . ": Invalid source width: $srcWidth" ); |
| 236 | |
| 237 | return false; |
| 238 | } |
| 239 | |
| 240 | $height = File::scaleHeight( $srcWidth, $srcHeight, $width ); |
| 241 | if ( $height == 0 ) { |
| 242 | # Force height to be at least 1 pixel |
| 243 | $height = 1; |
| 244 | } |
| 245 | |
| 246 | return true; |
| 247 | } |
| 248 | |
| 249 | /** |
| 250 | * @inheritDoc |
| 251 | * @stable to override |
| 252 | * @param File $image |
| 253 | * @param string $script |
| 254 | * @param array $params |
| 255 | * @return MediaTransformOutput|false |
| 256 | */ |
| 257 | public function getScriptedTransform( $image, $script, $params ) { |
| 258 | if ( !$this->normaliseParams( $image, $params ) ) { |
| 259 | return false; |
| 260 | } |
| 261 | $url = wfAppendQuery( $script, $this->getScriptParams( $params ) ); |
| 262 | |
| 263 | if ( $image->mustRender() || $params['width'] < $image->getWidth() ) { |
| 264 | return new ThumbnailImage( $image, $url, false, $params ); |
| 265 | } |
| 266 | } |
| 267 | |
| 268 | /** @inheritDoc */ |
| 269 | public function getImageSize( $image, $path ) { |
| 270 | // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged |
| 271 | return @getimagesize( $path ); |
| 272 | } |
| 273 | |
| 274 | /** @inheritDoc */ |
| 275 | public function getSizeAndMetadata( $state, $path ) { |
| 276 | // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged |
| 277 | $gis = @getimagesize( $path ); |
| 278 | if ( $gis ) { |
| 279 | $info = [ |
| 280 | 'width' => $gis[0], |
| 281 | 'height' => $gis[1], |
| 282 | ]; |
| 283 | if ( isset( $gis['bits'] ) ) { |
| 284 | $info['bits'] = $gis['bits']; |
| 285 | } |
| 286 | } else { |
| 287 | $info = []; |
| 288 | } |
| 289 | return $info; |
| 290 | } |
| 291 | |
| 292 | /** |
| 293 | * Function that returns the number of pixels to be thumbnailed. |
| 294 | * Intended for animated GIFs to multiply by the number of frames. |
| 295 | * |
| 296 | * If the file doesn't support a notion of "area" return 0. |
| 297 | * @stable to override |
| 298 | * |
| 299 | * @param File $image |
| 300 | * @return int |
| 301 | */ |
| 302 | public function getImageArea( $image ) { |
| 303 | return $image->getWidth() * $image->getHeight(); |
| 304 | } |
| 305 | |
| 306 | /** |
| 307 | * @inheritDoc |
| 308 | * @stable to override |
| 309 | * @param File $file |
| 310 | * @return string |
| 311 | */ |
| 312 | public function getShortDesc( $file ) { |
| 313 | $lang = $this->getLanguage(); |
| 314 | $nbytes = htmlspecialchars( $lang->formatSize( $file->getSize() ), ENT_QUOTES ); |
| 315 | $widthheight = wfMessage( 'widthheight' ) |
| 316 | ->numParams( $file->getWidth(), $file->getHeight() ) |
| 317 | ->inLanguage( $lang ) |
| 318 | ->escaped(); |
| 319 | |
| 320 | return "$widthheight ($nbytes)"; |
| 321 | } |
| 322 | |
| 323 | /** |
| 324 | * @inheritDoc |
| 325 | * @stable to override |
| 326 | * @param File $file |
| 327 | * @return string |
| 328 | */ |
| 329 | public function getLongDesc( $file ) { |
| 330 | $pages = $file->pageCount(); |
| 331 | if ( $pages === false || $pages <= 1 ) { |
| 332 | $msg = wfMessage( 'file-info-size' ) |
| 333 | ->numParams( $file->getWidth(), $file->getHeight() ) |
| 334 | ->sizeParams( $file->getSize() ) |
| 335 | ->params( '<span class="mime-type">' . $file->getMimeType() . '</span>' ) |
| 336 | ->inLanguage( $this->getLanguage() ) |
| 337 | ->parse(); |
| 338 | } else { |
| 339 | $msg = wfMessage( 'file-info-size-pages' ) |
| 340 | ->numParams( $file->getWidth(), $file->getHeight() ) |
| 341 | ->sizeParams( $file->getSize() ) |
| 342 | ->params( '<span class="mime-type">' . $file->getMimeType() . '</span>' )->numParams( $pages ) |
| 343 | ->inLanguage( $this->getLanguage() ) |
| 344 | ->parse(); |
| 345 | } |
| 346 | |
| 347 | return $msg; |
| 348 | } |
| 349 | |
| 350 | /** |
| 351 | * @inheritDoc |
| 352 | * @stable to override |
| 353 | * @param File $file |
| 354 | * @return string |
| 355 | */ |
| 356 | public function getDimensionsString( $file ) { |
| 357 | $pages = $file->pageCount(); |
| 358 | $lang = $this->getLanguage(); |
| 359 | if ( $pages > 1 ) { |
| 360 | return wfMessage( 'widthheightpage' ) |
| 361 | ->numParams( $file->getWidth(), $file->getHeight(), $pages ) |
| 362 | ->inLanguage( $lang )->text(); |
| 363 | } |
| 364 | return wfMessage( 'widthheight' ) |
| 365 | ->numParams( $file->getWidth(), $file->getHeight() )->inLanguage( $lang )->text(); |
| 366 | } |
| 367 | |
| 368 | /** |
| 369 | * @inheritDoc |
| 370 | * @stable to override |
| 371 | */ |
| 372 | public function sanitizeParamsForBucketing( $params ) { |
| 373 | $params = parent::sanitizeParamsForBucketing( $params ); |
| 374 | |
| 375 | // We unset the height parameters in order to let normaliseParams recalculate them |
| 376 | // Otherwise there might be a height discrepancy |
| 377 | unset( $params['height'] ); |
| 378 | unset( $params['physicalHeight'] ); |
| 379 | |
| 380 | return $params; |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | /** @deprecated class alias since 1.46 */ |
| 385 | class_alias( ImageHandler::class, 'ImageHandler' ); |