summaryrefslogtreecommitdiffstats
path: root/core/modules/responsive_image/src/Plugin/Field/FieldFormatter/ResponsiveImageFormatter.php
blob: 68aa58b86a45e454ed42c49e7348e3865fd7e7e0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
<?php

/**
 * @file
 * Contains \Drupal\responsive_image\Plugin\field\formatter\ResponsiveImageFormatter.
 */

namespace Drupal\responsive_image\Plugin\Field\FieldFormatter;

use Drupal\Component\Utility\NestedArray;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\image\Plugin\Field\FieldFormatter\ImageFormatterBase;

/**
 * Plugin for responsive image formatter.
 *
 * @FieldFormatter(
 *   id = "responsive_image",
 *   label = @Translation("Responsive image"),
 *   field_types = {
 *     "image",
 *   }
 * )
 */
class ResponsiveImageFormatter extends ImageFormatterBase {

  /**
   * {@inheritdoc}
   */
  public static function defaultSettings() {
    return array(
      'responsive_image_mapping' => '',
      'fallback_image_style' => '',
      'image_link' => '',
    ) + parent::defaultSettings();
  }

  /**
   * {@inheritdoc}
   */
  public function settingsForm(array $form, FormStateInterface $form_state) {
    $responsive_image_options = array();
    $responsive_image_mappings = entity_load_multiple('responsive_image_mapping');
    if ($responsive_image_mappings && !empty($responsive_image_mappings)) {
      foreach ($responsive_image_mappings as $machine_name => $responsive_image_mapping) {
        if ($responsive_image_mapping->hasMappings()) {
          $responsive_image_options[$machine_name] = $responsive_image_mapping->label();
        }
      }
    }

    $elements['responsive_image_mapping'] = array(
      '#title' => t('Responsive image mapping'),
      '#type' => 'select',
      '#default_value' => $this->getSetting('responsive_image_mapping'),
      '#required' => TRUE,
      '#options' => $responsive_image_options,
    );

    $image_styles = image_style_options(FALSE);
    $elements['fallback_image_style'] = array(
      '#title' => t('Fallback image style'),
      '#type' => 'select',
      '#default_value' => $this->getSetting('fallback_image_style'),
      '#empty_option' => t('Automatic'),
      '#options' => $image_styles,
    );

    $link_types = array(
      'content' => t('Content'),
      'file' => t('File'),
    );
    $elements['image_link'] = array(
      '#title' => t('Link image to'),
      '#type' => 'select',
      '#default_value' => $this->getSetting('image_link'),
      '#empty_option' => t('Nothing'),
      '#options' => $link_types,
    );

    return $elements;
  }

  /**
   * {@inheritdoc}
   */
  public function settingsSummary() {
    $summary = array();

    $responsive_image_mapping = entity_load('responsive_image_mapping', $this->getSetting('responsive_image_mapping'));
    if ($responsive_image_mapping) {
      $summary[] = t('Responsive image mapping: @responsive_image_mapping', array('@responsive_image_mapping' => $responsive_image_mapping->label()));

      $image_styles = image_style_options(FALSE);
      unset($image_styles['']);
      if (isset($image_styles[$this->getSetting('fallback_image_style')])) {
        $summary[] = t('Fallback Image style: @style', array('@style' => $image_styles[$this->getSetting('fallback_image_style')]));
      }
      else {
        $summary[] = t('Automatic fallback');
      }

      $link_types = array(
        'content' => t('Linked to content'),
        'file' => t('Linked to file'),
      );
      // Display this setting only if image is linked.
      if (isset($link_types[$this->getSetting('image_link')])) {
        $summary[] = $link_types[$this->getSetting('image_link')];
      }
    }
    else {
      $summary[] = t('Select a responsive image mapping.');
    }

    return $summary;
  }

  /**
   * {@inheritdoc}
   */
  public function viewElements(FieldItemListInterface $items) {
    $elements = array();
    // Check if the formatter involves a link.
    if ($this->getSetting('image_link') == 'content') {
      $uri = $items->getEntity()->urlInfo();
      // @todo Remove when theme_responsive_image_formatter() has support for route name.
      $uri['path'] = $items->getEntity()->getSystemPath();
    }
    elseif ($this->getSetting('image_link') == 'file') {
      $link_file = TRUE;
    }

    $fallback_image_style = '';

    // Check if the user defined a custom fallback image style.
    if ($this->getSetting('fallback_image_style')) {
      $fallback_image_style = $this->getSetting('fallback_image_style');
    }

    // Collect cache tags to be added for each item in the field.
    $responsive_image_mapping = entity_load('responsive_image_mapping', $this->getSetting('responsive_image_mapping'));
    $image_styles_to_load = array();
    if ($fallback_image_style) {
      $image_styles_to_load[] = $fallback_image_style;
    }
    $all_cache_tags = array();
    if ($responsive_image_mapping) {
      $all_cache_tags[] = $responsive_image_mapping->getCacheTag();
      foreach ($responsive_image_mapping->getMappings() as $mapping) {
        // First mapping found is used as fallback.
        if (empty($fallback_image_style)) {
          $fallback_image_style = $mapping['image_style'];
        }
        $image_styles_to_load[] = $mapping['image_style'];
      }
    }
    $image_styles = entity_load_multiple('image_style', $image_styles_to_load);
    foreach ($image_styles as $image_style) {
      $all_cache_tags[] = $image_style->getCacheTag();
    }

    $cache_tags = NestedArray::mergeDeepArray($all_cache_tags);

    foreach ($items as $delta => $item) {
      if (isset($link_file)) {
        $uri = array(
          'path' => file_create_url($item->entity->getFileUri()),
          'options' => array(),
        );
      }
      $elements[$delta] = array(
        '#theme' => 'responsive_image_formatter',
        '#attached' => array(
          'library' => array(
            'core/picturefill',
          )
        ),
        '#item' => $item,
        '#image_style' => $fallback_image_style,
        '#mapping_id' => $responsive_image_mapping ? $responsive_image_mapping->id() : '',
        '#path' => isset($uri) ? $uri : '',
        '#cache' => array(
          'tags' => $cache_tags,
        )
      );
    }

    return $elements;
  }
}