photoswipe.theme.inc in PhotoSwipe 8

Photoswipe theme preprocess functions.

File

photoswipe.theme.inc

<?php

/**
 * @file
 * Photoswipe theme preprocess functions.
 */
use Drupal\Core\Language\Language;
use Drupal\image\Entity\ImageStyle;

/**
 * Prepares variables for a Photoswipe image field formatter.
 *
 * @param array $variables
 *   An associative array containing:
 *   - item: An ImageItem object.
 *   - display_settings: optional image styles.
 *
 * @ingroup themeable
 */
function template_preprocess_photoswipe_image_formatter(array &$variables) {
  $item = $variables['item'];
  $settings = $variables['display_settings'];
  $node = $item
    ->getParent()
    ->getParent()
    ->getValue();
  $uri = $item->entity
    ->getFileUri();
  $alt = !empty($item->alt) ? $item->alt : '';
  $title = !empty($item->title) ? $item->title : '';
  if (empty($alt) && !empty($item->field_file_image_alt_text[Language::LANGCODE_NOT_SPECIFIED])) {
    $alt = $item->field_file_image_alt_text[Language::LANGCODE_NOT_SPECIFIED][0]['value'];
  }
  if (empty($title) && !empty($item->field_file_image_title_text[Language::LANGCODE_NOT_SPECIFIED])) {
    $title = $item->field_file_image_title_text[Language::LANGCODE_NOT_SPECIFIED][0]['value'];
  }
  $image = [
    '#theme' => 'image_style',
    '#uri' => $uri,
    '#alt' => $alt,
    '#title' => $title,
    '#attributes' => $item->_attributes,
    '#style_name' => $settings['photoswipe_node_style'],
  ];
  if (isset($variables['delta']) && $variables['delta'] === 0 && !empty($settings['photoswipe_node_style_first'])) {
    $image['#style_name'] = $settings['photoswipe_node_style_first'];
  }

  // The image.factory service will check if our image is valid.
  $image_file = \Drupal::service('image.factory')
    ->get($uri);
  if ($image_file
    ->isValid()) {
    $image_width = $image_file
      ->getWidth();
    $image_height = $image_file
      ->getHeight();
  }
  else {
    $image_width = $image_height = NULL;
  }
  $dimensions = [];
  if (!empty($image_width) && !empty($image_height)) {
    $image['#width'] = $dimensions['width'] = $image_width;
    $image['#height'] = $dimensions['height'] = $image_height;
  }

  // Create the path to the image that will show in Photoswipe.
  if ($style_name = $settings['photoswipe_image_style']) {

    // Load the image style.
    $style = ImageStyle::load($style_name);

    // Fetch the Image style path from the Image URI.
    $path = $style
      ->buildUrl($uri);

    // Set the dimensions.
    $style
      ->transformDimensions($dimensions, $uri);
  }
  else {
    $path = file_create_url($uri);
  }

  // Render as a standard image if an image style is not given.
  if (empty($image['#style_name'])) {
    $image['#theme'] = 'image';
  }

  // Set Caption for this image.
  if (isset($settings['photoswipe_caption'])) {
    $caption_setting = $settings['photoswipe_caption'];
    switch ($caption_setting) {
      case 'alt':
        $caption = $alt;
        break;
      case 'title':
        $caption = $title;
        break;
      case 'node_title':
        if (!empty($node->title)) {
          $caption = $node->title->value;
        }
        else {
          $caption = $alt;
        }
        break;
      default:
        $field_view = $node->{$caption_setting}
          ->view();
        $field_view['#view_mode'] = $settings['photoswipe_view_mode'] ? $settings['photoswipe_view_mode'] : 'default';
        $caption = render($field_view);
        break;
    }
  }
  else {
    $caption = $alt;
  }
  $variables['image'] = $image;
  $variables['path'] = $path;
  $variables['attributes'] = [
    'class' => 'photoswipe',
    'data-size' => $dimensions['width'] . 'x' . $dimensions['height'],
    'data-overlay-title' => $caption,
  ];
}

Functions

Name	Description
template_preprocess_photoswipe_image_formatter	Prepares variables for a Photoswipe image field formatter.