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| 1 | <?php |
| 2 | /** |
| 3 | * Media-handling base classes and generic functionality. |
| 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 | * @ingroup Media |
| 22 | */ |
| 23 | |
| 24 | use Wikimedia\AtEase\AtEase; |
| 25 | |
| 26 | /** |
| 27 | * Media handler abstract base class for images |
| 28 | * |
| 29 | * @stable to extend |
| 30 | * |
| 31 | * @ingroup Media |
| 32 | */ |
| 33 | abstract class ImageHandler extends MediaHandler { |
| 34 | /** |
| 35 | * @inheritDoc |
| 36 | * @stable to override |
| 37 | * @param File $file |
| 38 | * @return bool |
| 39 | */ |
| 40 | public function canRender( $file ) { |
| 41 | return ( $file->getWidth() && $file->getHeight() ); |
| 42 | } |
| 43 | |
| 44 | /** |
| 45 | * @inheritDoc |
| 46 | * @stable to override |
| 47 | * @return string[] |
| 48 | */ |
| 49 | public function getParamMap() { |
| 50 | return [ 'img_width' => 'width' ]; |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * @inheritDoc |
| 55 | * @stable to override |
| 56 | */ |
| 57 | public function validateParam( $name, $value ) { |
| 58 | return in_array( $name, [ 'width', 'height' ] ) && $value > 0; |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * @inheritDoc |
| 63 | * @stable to override |
| 64 | * @throws MediaTransformInvalidParametersException |
| 65 | */ |
| 66 | public function makeParamString( $params ) { |
| 67 | if ( isset( $params['physicalWidth'] ) ) { |
| 68 | $width = $params['physicalWidth']; |
| 69 | } elseif ( isset( $params['width'] ) ) { |
| 70 | $width = $params['width']; |
| 71 | } else { |
| 72 | throw new MediaTransformInvalidParametersException( 'No width specified to ' . __METHOD__ ); |
| 73 | } |
| 74 | |
| 75 | # Removed for ProofreadPage |
| 76 | # $width = intval( $width ); |
| 77 | return "{$width}px"; |
| 78 | } |
| 79 | |
| 80 | /** |
| 81 | * @inheritDoc |
| 82 | * @stable to override |
| 83 | */ |
| 84 | public function parseParamString( $str ) { |
| 85 | $m = false; |
| 86 | if ( preg_match( '/^(\d+)px$/', $str, $m ) ) { |
| 87 | return [ 'width' => $m[1] ]; |
| 88 | } |
| 89 | return false; |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * @stable to override |
| 94 | * @param array $params |
| 95 | * @return array |
| 96 | */ |
| 97 | protected function getScriptParams( $params ) { |
| 98 | return [ 'width' => $params['width'] ]; |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * @inheritDoc |
| 103 | * @stable to override |
| 104 | * @param File $image |
| 105 | * @param array &$params @phan-ignore-reference |
| 106 | * @return bool |
| 107 | * @phan-assert array{width:int,physicalWidth:int,height:int,physicalHeight:int,page:int} $params |
| 108 | */ |
| 109 | public function normaliseParams( $image, &$params ) { |
| 110 | if ( !isset( $params['width'] ) ) { |
| 111 | return false; |
| 112 | } |
| 113 | |
| 114 | if ( !isset( $params['page'] ) ) { |
| 115 | $params['page'] = 1; |
| 116 | } else { |
| 117 | $params['page'] = (int)$params['page']; |
| 118 | if ( $params['page'] > $image->pageCount() ) { |
| 119 | $params['page'] = $image->pageCount(); |
| 120 | } |
| 121 | |
| 122 | if ( $params['page'] < 1 ) { |
| 123 | $params['page'] = 1; |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | $srcWidth = $image->getWidth( $params['page'] ); |
| 128 | $srcHeight = $image->getHeight( $params['page'] ); |
| 129 | |
| 130 | if ( isset( $params['height'] ) && $params['height'] !== -1 ) { |
| 131 | # Height & width were both set |
| 132 | if ( $params['width'] * $srcHeight > $params['height'] * $srcWidth ) { |
| 133 | # Height is the relative smaller dimension, so scale width accordingly |
| 134 | $params['width'] = self::fitBoxWidth( $srcWidth, $srcHeight, $params['height'] ); |
| 135 | |
| 136 | if ( $params['width'] == 0 ) { |
| 137 | # Very small image, so we need to rely on client side scaling :( |
| 138 | $params['width'] = 1; |
| 139 | } |
| 140 | |
| 141 | $params['physicalWidth'] = $params['width']; |
| 142 | } else { |
| 143 | # Height was crap, unset it so that it will be calculated later |
| 144 | unset( $params['height'] ); |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | if ( !isset( $params['physicalWidth'] ) ) { |
| 149 | # Passed all validations, so set the physicalWidth |
| 150 | // @phan-suppress-next-line PhanTypePossiblyInvalidDimOffset False positive, checked above |
| 151 | $params['physicalWidth'] = $params['width']; |
| 152 | } |
| 153 | |
| 154 | # Because thumbs are only referred to by width, the height always needs |
| 155 | # to be scaled by the width to keep the thumbnail sizes consistent, |
| 156 | # even if it was set inside the if block above |
| 157 | $params['physicalHeight'] = File::scaleHeight( $srcWidth, $srcHeight, |
| 158 | $params['physicalWidth'] ); |
| 159 | |
| 160 | # Set the height if it was not validated in the if block higher up |
| 161 | if ( !isset( $params['height'] ) || $params['height'] === -1 ) { |
| 162 | $params['height'] = $params['physicalHeight']; |
| 163 | } |
| 164 | |
| 165 | if ( !$this->validateThumbParams( $params['physicalWidth'], |
| 166 | $params['physicalHeight'], $srcWidth, $srcHeight ) |
| 167 | ) { |
| 168 | return false; |
| 169 | } |
| 170 | |
| 171 | return true; |
| 172 | } |
| 173 | |
| 174 | /** |
| 175 | * Validate thumbnail parameters and fill in the correct height |
| 176 | * |
| 177 | * @param int &$width Specified width (input/output) |
| 178 | * @param int &$height Height (output only) |
| 179 | * @param int $srcWidth Width of the source image |
| 180 | * @param int $srcHeight Height of the source image |
| 181 | * @return bool False to indicate that an error should be returned to the user. |
| 182 | */ |
| 183 | private function validateThumbParams( &$width, &$height, $srcWidth, $srcHeight ) { |
| 184 | $width = (int)$width; |
| 185 | |
| 186 | if ( $width <= 0 ) { |
| 187 | wfDebug( __METHOD__ . ": Invalid destination width: $width" ); |
| 188 | |
| 189 | return false; |
| 190 | } |
| 191 | if ( $srcWidth <= 0 ) { |
| 192 | wfDebug( __METHOD__ . ": Invalid source width: $srcWidth" ); |
| 193 | |
| 194 | return false; |
| 195 | } |
| 196 | |
| 197 | $height = File::scaleHeight( $srcWidth, $srcHeight, $width ); |
| 198 | if ( $height == 0 ) { |
| 199 | # Force height to be at least 1 pixel |
| 200 | $height = 1; |
| 201 | } |
| 202 | |
| 203 | return true; |
| 204 | } |
| 205 | |
| 206 | /** |
| 207 | * @inheritDoc |
| 208 | * @stable to override |
| 209 | * @param File $image |
| 210 | * @param string $script |
| 211 | * @param array $params |
| 212 | * @return MediaTransformOutput|false |
| 213 | */ |
| 214 | public function getScriptedTransform( $image, $script, $params ) { |
| 215 | if ( !$this->normaliseParams( $image, $params ) ) { |
| 216 | return false; |
| 217 | } |
| 218 | $url = wfAppendQuery( $script, $this->getScriptParams( $params ) ); |
| 219 | |
| 220 | if ( $image->mustRender() || $params['width'] < $image->getWidth() ) { |
| 221 | return new ThumbnailImage( $image, $url, false, $params ); |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | public function getImageSize( $image, $path ) { |
| 226 | AtEase::suppressWarnings(); |
| 227 | $gis = getimagesize( $path ); |
| 228 | AtEase::restoreWarnings(); |
| 229 | |
| 230 | return $gis; |
| 231 | } |
| 232 | |
| 233 | public function getSizeAndMetadata( $state, $path ) { |
| 234 | // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged |
| 235 | $gis = @getimagesize( $path ); |
| 236 | if ( $gis ) { |
| 237 | $info = [ |
| 238 | 'width' => $gis[0], |
| 239 | 'height' => $gis[1], |
| 240 | ]; |
| 241 | if ( isset( $gis['bits'] ) ) { |
| 242 | $info['bits'] = $gis['bits']; |
| 243 | } |
| 244 | } else { |
| 245 | $info = []; |
| 246 | } |
| 247 | return $info; |
| 248 | } |
| 249 | |
| 250 | /** |
| 251 | * Function that returns the number of pixels to be thumbnailed. |
| 252 | * Intended for animated GIFs to multiply by the number of frames. |
| 253 | * |
| 254 | * If the file doesn't support a notion of "area" return 0. |
| 255 | * @stable to override |
| 256 | * |
| 257 | * @param File $image |
| 258 | * @return int |
| 259 | */ |
| 260 | public function getImageArea( $image ) { |
| 261 | return $image->getWidth() * $image->getHeight(); |
| 262 | } |
| 263 | |
| 264 | /** |
| 265 | * @inheritDoc |
| 266 | * @stable to override |
| 267 | * @param File $file |
| 268 | * @return string |
| 269 | */ |
| 270 | public function getShortDesc( $file ) { |
| 271 | global $wgLang; |
| 272 | $nbytes = htmlspecialchars( $wgLang->formatSize( $file->getSize() ) ); |
| 273 | $widthheight = wfMessage( 'widthheight' ) |
| 274 | ->numParams( $file->getWidth(), $file->getHeight() )->escaped(); |
| 275 | |
| 276 | return "$widthheight ($nbytes)"; |
| 277 | } |
| 278 | |
| 279 | /** |
| 280 | * @inheritDoc |
| 281 | * @stable to override |
| 282 | * @param File $file |
| 283 | * @return string |
| 284 | */ |
| 285 | public function getLongDesc( $file ) { |
| 286 | $pages = $file->pageCount(); |
| 287 | if ( $pages === false || $pages <= 1 ) { |
| 288 | $msg = wfMessage( 'file-info-size' )->numParams( $file->getWidth(), |
| 289 | $file->getHeight() )->sizeParams( $file->getSize() )->params( |
| 290 | '<span class="mime-type">' . $file->getMimeType() . '</span>' )->parse(); |
| 291 | } else { |
| 292 | $msg = wfMessage( 'file-info-size-pages' )->numParams( $file->getWidth(), |
| 293 | $file->getHeight() )->sizeParams( $file->getSize() )->params( |
| 294 | '<span class="mime-type">' . $file->getMimeType() . '</span>' )->numParams( $pages )->parse(); |
| 295 | } |
| 296 | |
| 297 | return $msg; |
| 298 | } |
| 299 | |
| 300 | /** |
| 301 | * @inheritDoc |
| 302 | * @stable to override |
| 303 | * @param File $file |
| 304 | * @return string |
| 305 | */ |
| 306 | public function getDimensionsString( $file ) { |
| 307 | $pages = $file->pageCount(); |
| 308 | if ( $pages > 1 ) { |
| 309 | return wfMessage( 'widthheightpage' ) |
| 310 | ->numParams( $file->getWidth(), $file->getHeight(), $pages )->text(); |
| 311 | } |
| 312 | return wfMessage( 'widthheight' ) |
| 313 | ->numParams( $file->getWidth(), $file->getHeight() )->text(); |
| 314 | } |
| 315 | |
| 316 | /** |
| 317 | * @inheritDoc |
| 318 | * @stable to override |
| 319 | */ |
| 320 | public function sanitizeParamsForBucketing( $params ) { |
| 321 | $params = parent::sanitizeParamsForBucketing( $params ); |
| 322 | |
| 323 | // We unset the height parameters in order to let normaliseParams recalculate them |
| 324 | // Otherwise there might be a height discrepancy |
| 325 | unset( $params['height'] ); |
| 326 | unset( $params['physicalHeight'] ); |
| 327 | |
| 328 | return $params; |
| 329 | } |
| 330 | } |