includes/gallery/PackedImageGallery.php

   1 <?php
   2 /**
   3  * Packed image gallery. All images adjusted to be same height.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 class PackedImageGallery extends TraditionalImageGallery {
  24         function __construct( $mode = 'traditional', IContextSource $context = null ) {
  25                 parent::__construct( $mode, $context );
  26                 // Does not support per row option.
  27                 $this->mPerRow = 0;
  28         }
  29
  30         /**
  31          * We artificially have 1.5 the resolution neccessary so that
  32          * we can scale it up by that much on the client side, without
  33          * worrying about requesting a new image.
  34          */
  35         const SCALE_FACTOR = 1.5;
  36
  37         protected function getVPad( $boxHeight, $thumbHeight ) {
  38                 return ( $this->getThumbPadding() + $boxHeight - $thumbHeight / self::SCALE_FACTOR ) / 2;
  39         }
  40
  41         protected function getThumbPadding() {
  42                 return 0;
  43         }
  44
  45         protected function getGBPadding() {
  46                 return 2;
  47         }
  48
  49         /**
  50          * @param File $img The file being transformed. May be false
  51          * @return array
  52          */
  53         protected function getThumbParams( $img ) {
  54                 if ( $img && $img->getMediaType() === MEDIATYPE_AUDIO ) {
  55                         $width = $this->mWidths;
  56                 } else {
  57                         // We want the width not to be the constraining
  58                         // factor, so use random big number.
  59                         $width = $this->mHeights * 10 + 100;
  60                 }
  61
  62                 // self::SCALE_FACTOR so the js has some room to manipulate sizes.
  63                 return array(
  64                         'width' => $width * self::SCALE_FACTOR,
  65                         'height' => $this->mHeights * self::SCALE_FACTOR,
  66                 );
  67         }
  68
  69         protected function getThumbDivWidth( $thumbWidth ) {
  70                 // Require at least 60px wide, so caption is wide enough to work.
  71                 if ( $thumbWidth < 60 * self::SCALE_FACTOR ) {
  72                         $thumbWidth = 60 * self::SCALE_FACTOR;
  73                 }
  74
  75                 return $thumbWidth / self::SCALE_FACTOR + $this->getThumbPadding();
  76         }
  77
  78         /**
  79          * @param MediaTransformOutput|bool $thumb The thumbnail, or false if no
  80          *   thumb (which can happen)
  81          * @return float
  82          */
  83         protected function getGBWidth( $thumb ) {
  84                 $thumbWidth = $thumb ? $thumb->getWidth() : $this->mWidths * self::SCALE_FACTOR;
  85
  86                 return $this->getThumbDivWidth( $thumbWidth ) + $this->getGBPadding();
  87         }
  88
  89         protected function adjustImageParameters( $thumb, &$imageParameters ) {
  90                 // Re-adjust back to normal size.
  91                 $imageParameters['override-width'] = ceil( $thumb->getWidth() / self::SCALE_FACTOR );
  92                 $imageParameters['override-height'] = ceil( $thumb->getHeight() / self::SCALE_FACTOR );
  93         }
  94
  95         /**
  96          * Add javascript which auto-justifies the rows by manipulating the image sizes.
  97          * Also ensures that the hover version of this degrades gracefully.
  98          * @return array
  99          */
 100         protected function getModules() {
 101                 return array( 'mediawiki.page.gallery' );
 102         }
 103
 104         /**
 105          * Do not support per-row on packed. It really doesn't work
 106          * since the images have varying widths.
 107          * @param int $num
 108          */
 109         public function setPerRow( $num ) {
 110                 return;
 111         }
 112 }