image.admin.inc

<?php


/**
 * @file
 * Administration pages for image settings.
 */
use Drupal\Core\Render\Element;

/**
 * Prepares variables for image style preview templates.
 *
 * Default template: image-style-preview.html.twig.
 *
 * @param array $variables
 *   An associative array containing:
 *   - style: \Drupal\image\ImageStyleInterface image style being previewed.
 */
function template_preprocess_image_style_preview(&$variables) {
    // Style information.
    $style = $variables['style'];
    $variables['style_id'] = $style->id();
    $variables['style_name'] = $style->label();
    // Cache bypass token.
    $variables['cache_bypass'] = REQUEST_TIME;
    // Sample image info.
    $sample_width = 160;
    $sample_height = 160;
    $image_factory = \Drupal::service('image.factory');
    // Set up original file information.
    $original_path = \Drupal::config('image.settings')->get('preview_image');
    $original_image = $image_factory->get($original_path);
    $variables['original'] = [
        'url' => file_url_transform_relative(file_create_url($original_path)),
        'width' => $original_image->getWidth(),
        'height' => $original_image->getHeight(),
    ];
    if ($variables['original']['width'] > $variables['original']['height']) {
        $variables['preview']['original']['width'] = min($variables['original']['width'], $sample_width);
        $variables['preview']['original']['height'] = round($variables['preview']['original']['width'] / $variables['original']['width'] * $variables['original']['height']);
    }
    else {
        $variables['preview']['original']['height'] = min($variables['original']['height'], $sample_height);
        $variables['preview']['original']['width'] = round($variables['preview']['original']['height'] / $variables['original']['height'] * $variables['original']['width']);
    }
    // Set up derivative file information.
    $preview_file = $style->buildUri($original_path);
    // Create derivative if necessary.
    if (!file_exists($preview_file)) {
        $style->createDerivative($original_path, $preview_file);
    }
    $preview_image = $image_factory->get($preview_file);
    $variables['derivative'] = [
        'url' => file_url_transform_relative(file_create_url($preview_file)),
        'width' => $preview_image->getWidth(),
        'height' => $preview_image->getHeight(),
    ];
    if ($variables['derivative']['width'] > $variables['derivative']['height']) {
        $variables['preview']['derivative']['width'] = min($variables['derivative']['width'], $sample_width);
        $variables['preview']['derivative']['height'] = round($variables['preview']['derivative']['width'] / $variables['derivative']['width'] * $variables['derivative']['height']);
    }
    else {
        $variables['preview']['derivative']['height'] = min($variables['derivative']['height'], $sample_height);
        $variables['preview']['derivative']['width'] = round($variables['preview']['derivative']['height'] / $variables['derivative']['height'] * $variables['derivative']['width']);
    }
    // Build the preview of the original image.
    $variables['original']['rendered'] = [
        '#theme' => 'image',
        '#uri' => $original_path,
        '#alt' => t('Sample original image'),
        '#title' => '',
        '#attributes' => [
            'width' => $variables['original']['width'],
            'height' => $variables['original']['height'],
            'style' => 'width: ' . $variables['preview']['original']['width'] . 'px; height: ' . $variables['preview']['original']['height'] . 'px;',
        ],
    ];
    // Build the preview of the image style derivative. Timestamps are added
    // to prevent caching of images on the client side.
    $variables['derivative']['rendered'] = [
        '#theme' => 'image',
        '#uri' => $variables['derivative']['url'] . '?cache_bypass=' . $variables['cache_bypass'],
        '#alt' => t('Sample modified image'),
        '#title' => '',
        '#attributes' => [
            'width' => $variables['derivative']['width'],
            'height' => $variables['derivative']['height'],
            'style' => 'width: ' . $variables['preview']['derivative']['width'] . 'px; height: ' . $variables['preview']['derivative']['height'] . 'px;',
        ],
    ];
}

/**
 * Prepares variables for image anchor templates.
 *
 * Default template: image-anchor.html.twig.
 *
 * @param array $variables
 *   An associative array containing:
 *   - element: An associative array containing the image.
 */
function template_preprocess_image_anchor(&$variables) {
    $element = $variables['element'];
    $rows = [];
    $row = [];
    foreach (Element::children($element) as $n => $key) {
        $element[$key]['#attributes']['title'] = $element[$key]['#title'];
        unset($element[$key]['#title']);
        $row[] = [
            'data' => $element[$key],
        ];
        if ($n % 3 == 3 - 1) {
            $rows[] = $row;
            $row = [];
        }
    }
    $variables['table'] = [
        '#type' => 'table',
        '#header' => [],
        '#rows' => $rows,
        '#attributes' => [
            'class' => [
                'image-anchor',
            ],
        ],
    ];
}