www.aleph1.co.uk Git - yaffs-website/blob - web/core/modules/image/image.admin.inc

   1 <?php
   2
   3 /**
   4  * @file
   5  * Administration pages for image settings.
   6  */
   7
   8 use Drupal\Core\Render\Element;
   9
  10 /**
  11  * Prepares variables for image style preview templates.
  12  *
  13  * Default template: image-style-preview.html.twig.
  14  *
  15  * @param array $variables
  16  *   An associative array containing:
  17  *   - style: \Drupal\image\ImageStyleInterface image style being previewed.
  18  */
  19 function template_preprocess_image_style_preview(&$variables) {
  20   // Style information.
  21   $style = $variables['style'];
  22   $variables['style_id'] = $style->id();
  23   $variables['style_name'] = $style->label();
  24
  25   // Cache bypass token.
  26   $variables['cache_bypass'] = REQUEST_TIME;
  27
  28   // Sample image info.
  29   $sample_width = 160;
  30   $sample_height = 160;
  31   $image_factory = \Drupal::service('image.factory');
  32
  33   // Set up original file information.
  34   $original_path = \Drupal::config('image.settings')->get('preview_image');
  35   $original_image = $image_factory->get($original_path);
  36   $variables['original'] = [
  37     'url' => file_url_transform_relative(file_create_url($original_path)),
  38     'width' => $original_image->getWidth(),
  39     'height' => $original_image->getHeight(),
  40   ];
  41   if ($variables['original']['width'] > $variables['original']['height']) {
  42     $variables['preview']['original']['width'] = min($variables['original']['width'], $sample_width);
  43     $variables['preview']['original']['height'] = round($variables['preview']['original']['width'] / $variables['original']['width'] * $variables['original']['height']);
  44   }
  45   else {
  46     $variables['preview']['original']['height'] = min($variables['original']['height'], $sample_height);
  47     $variables['preview']['original']['width'] = round($variables['preview']['original']['height'] / $variables['original']['height'] * $variables['original']['width']);
  48   }
  49
  50   // Set up derivative file information.
  51   $preview_file = $style->buildUri($original_path);
  52   // Create derivative if necessary.
  53   if (!file_exists($preview_file)) {
  54     $style->createDerivative($original_path, $preview_file);
  55   }
  56   $preview_image = $image_factory->get($preview_file);
  57   $variables['derivative'] = [
  58     'url' => file_url_transform_relative(file_create_url($preview_file)),
  59     'width' => $preview_image->getWidth(),
  60     'height' => $preview_image->getHeight(),
  61   ];
  62   if ($variables['derivative']['width'] > $variables['derivative']['height']) {
  63     $variables['preview']['derivative']['width'] = min($variables['derivative']['width'], $sample_width);
  64     $variables['preview']['derivative']['height'] = round($variables['preview']['derivative']['width'] / $variables['derivative']['width'] * $variables['derivative']['height']);
  65   }
  66   else {
  67     $variables['preview']['derivative']['height'] = min($variables['derivative']['height'], $sample_height);
  68     $variables['preview']['derivative']['width'] = round($variables['preview']['derivative']['height'] / $variables['derivative']['height'] * $variables['derivative']['width']);
  69   }
  70
  71   // Build the preview of the original image.
  72   $variables['original']['rendered'] = [
  73     '#theme' => 'image',
  74     '#uri' => $original_path,
  75     '#alt' => t('Sample original image'),
  76     '#title' => '',
  77     '#attributes' => [
  78       'width' => $variables['original']['width'],
  79       'height' => $variables['original']['height'],
  80       'style' => 'width: ' . $variables['preview']['original']['width'] . 'px; height: ' . $variables['preview']['original']['height'] . 'px;',
  81     ],
  82   ];
  83
  84   // Build the preview of the image style derivative. Timestamps are added
  85   // to prevent caching of images on the client side.
  86   $variables['derivative']['rendered'] = [
  87     '#theme' => 'image',
  88     '#uri' => $variables['derivative']['url'] . '?cache_bypass=' . $variables['cache_bypass'],
  89     '#alt' => t('Sample modified image'),
  90     '#title' => '',
  91     '#attributes' => [
  92       'width' => $variables['derivative']['width'],
  93       'height' => $variables['derivative']['height'],
  94       'style' => 'width: ' . $variables['preview']['derivative']['width'] . 'px; height: ' . $variables['preview']['derivative']['height'] . 'px;',
  95     ],
  96   ];
  97
  98 }
  99
 100 /**
 101  * Prepares variables for image anchor templates.
 102  *
 103  * Default template: image-anchor.html.twig.
 104  *
 105  * @param array $variables
 106  *   An associative array containing:
 107  *   - element: An associative array containing the image.
 108  */
 109 function template_preprocess_image_anchor(&$variables) {
 110   $element = $variables['element'];
 111
 112   $rows = [];
 113   $row = [];
 114   foreach (Element::children($element) as $n => $key) {
 115     $element[$key]['#attributes']['title'] = $element[$key]['#title'];
 116     unset($element[$key]['#title']);
 117     $row[] = [
 118       'data' => $element[$key],
 119     ];
 120     if ($n % 3 == 3 - 1) {
 121       $rows[] = $row;
 122       $row = [];
 123     }
 124   }
 125
 126   $variables['table'] = [
 127     '#type' => 'table',
 128     '#header' => [],
 129     '#rows' => $rows,
 130     '#attributes' => [
 131       'class' => ['image-anchor'],
 132     ],
 133   ];
 134 }