Chris@0: <?php
Chris@0: 
Chris@0: /**
Chris@0:  * @file
Chris@0:  * Administration pages for image settings.
Chris@0:  */
Chris@0: 
Chris@0: use Drupal\Core\Render\Element;
Chris@0: 
Chris@0: /**
Chris@0:  * Prepares variables for image style preview templates.
Chris@0:  *
Chris@0:  * Default template: image-style-preview.html.twig.
Chris@0:  *
Chris@0:  * @param array $variables
Chris@0:  *   An associative array containing:
Chris@0:  *   - style: \Drupal\image\ImageStyleInterface image style being previewed.
Chris@0:  */
Chris@0: function template_preprocess_image_style_preview(&$variables) {
Chris@0:   // Style information.
Chris@0:   $style = $variables['style'];
Chris@0:   $variables['style_id'] = $style->id();
Chris@0:   $variables['style_name'] = $style->label();
Chris@0: 
Chris@0:   // Cache bypass token.
Chris@0:   $variables['cache_bypass'] = REQUEST_TIME;
Chris@0: 
Chris@0:   // Sample image info.
Chris@0:   $sample_width = 160;
Chris@0:   $sample_height = 160;
Chris@0:   $image_factory = \Drupal::service('image.factory');
Chris@0: 
Chris@0:   // Set up original file information.
Chris@0:   $original_path = \Drupal::config('image.settings')->get('preview_image');
Chris@0:   $original_image = $image_factory->get($original_path);
Chris@0:   $variables['original'] = [
Chris@0:     'url' => file_url_transform_relative(file_create_url($original_path)),
Chris@0:     'width' => $original_image->getWidth(),
Chris@0:     'height' => $original_image->getHeight(),
Chris@0:   ];
Chris@0:   if ($variables['original']['width'] > $variables['original']['height']) {
Chris@0:     $variables['preview']['original']['width'] = min($variables['original']['width'], $sample_width);
Chris@0:     $variables['preview']['original']['height'] = round($variables['preview']['original']['width'] / $variables['original']['width'] * $variables['original']['height']);
Chris@0:   }
Chris@0:   else {
Chris@0:     $variables['preview']['original']['height'] = min($variables['original']['height'], $sample_height);
Chris@0:     $variables['preview']['original']['width'] = round($variables['preview']['original']['height'] / $variables['original']['height'] * $variables['original']['width']);
Chris@0:   }
Chris@0: 
Chris@0:   // Set up derivative file information.
Chris@0:   $preview_file = $style->buildUri($original_path);
Chris@0:   // Create derivative if necessary.
Chris@0:   if (!file_exists($preview_file)) {
Chris@0:     $style->createDerivative($original_path, $preview_file);
Chris@0:   }
Chris@0:   $preview_image = $image_factory->get($preview_file);
Chris@0:   $variables['derivative'] = [
Chris@0:     'url' => file_url_transform_relative(file_create_url($preview_file)),
Chris@0:     'width' => $preview_image->getWidth(),
Chris@0:     'height' => $preview_image->getHeight(),
Chris@0:   ];
Chris@0:   if ($variables['derivative']['width'] > $variables['derivative']['height']) {
Chris@0:     $variables['preview']['derivative']['width'] = min($variables['derivative']['width'], $sample_width);
Chris@0:     $variables['preview']['derivative']['height'] = round($variables['preview']['derivative']['width'] / $variables['derivative']['width'] * $variables['derivative']['height']);
Chris@0:   }
Chris@0:   else {
Chris@0:     $variables['preview']['derivative']['height'] = min($variables['derivative']['height'], $sample_height);
Chris@0:     $variables['preview']['derivative']['width'] = round($variables['preview']['derivative']['height'] / $variables['derivative']['height'] * $variables['derivative']['width']);
Chris@0:   }
Chris@0: 
Chris@0:   // Build the preview of the original image.
Chris@0:   $variables['original']['rendered'] = [
Chris@0:     '#theme' => 'image',
Chris@0:     '#uri' => $original_path,
Chris@0:     '#alt' => t('Sample original image'),
Chris@0:     '#title' => '',
Chris@0:     '#attributes' => [
Chris@0:       'width' => $variables['original']['width'],
Chris@0:       'height' => $variables['original']['height'],
Chris@0:       'style' => 'width: ' . $variables['preview']['original']['width'] . 'px; height: ' . $variables['preview']['original']['height'] . 'px;',
Chris@0:     ],
Chris@0:   ];
Chris@0: 
Chris@0:   // Build the preview of the image style derivative. Timestamps are added
Chris@0:   // to prevent caching of images on the client side.
Chris@0:   $variables['derivative']['rendered'] = [
Chris@0:     '#theme' => 'image',
Chris@0:     '#uri' => $variables['derivative']['url'] . '?cache_bypass=' . $variables['cache_bypass'],
Chris@0:     '#alt' => t('Sample modified image'),
Chris@0:     '#title' => '',
Chris@0:     '#attributes' => [
Chris@0:       'width' => $variables['derivative']['width'],
Chris@0:       'height' => $variables['derivative']['height'],
Chris@0:       'style' => 'width: ' . $variables['preview']['derivative']['width'] . 'px; height: ' . $variables['preview']['derivative']['height'] . 'px;',
Chris@0:     ],
Chris@0:   ];
Chris@0: 
Chris@0: }
Chris@0: 
Chris@0: /**
Chris@0:  * Prepares variables for image anchor templates.
Chris@0:  *
Chris@0:  * Default template: image-anchor.html.twig.
Chris@0:  *
Chris@0:  * @param array $variables
Chris@0:  *   An associative array containing:
Chris@0:  *   - element: An associative array containing the image.
Chris@0:  */
Chris@0: function template_preprocess_image_anchor(&$variables) {
Chris@0:   $element = $variables['element'];
Chris@0: 
Chris@0:   $rows = [];
Chris@0:   $row = [];
Chris@0:   foreach (Element::children($element) as $n => $key) {
Chris@0:     $element[$key]['#attributes']['title'] = $element[$key]['#title'];
Chris@0:     unset($element[$key]['#title']);
Chris@0:     $row[] = [
Chris@0:       'data' => $element[$key],
Chris@0:     ];
Chris@0:     if ($n % 3 == 3 - 1) {
Chris@0:       $rows[] = $row;
Chris@0:       $row = [];
Chris@0:     }
Chris@0:   }
Chris@0: 
Chris@0:   $variables['table'] = [
Chris@0:     '#type' => 'table',
Chris@0:     '#header' => [],
Chris@0:     '#rows' => $rows,
Chris@0:     '#attributes' => [
Chris@0:       'class' => ['image-anchor'],
Chris@0:     ],
Chris@0:   ];
Chris@0: }