diff core/lib/Drupal/Core/Asset/JsCollectionRenderer.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/lib/Drupal/Core/Asset/JsCollectionRenderer.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,104 @@
+<?php
+
+namespace Drupal\Core\Asset;
+
+use Drupal\Component\Serialization\Json;
+use Drupal\Core\State\StateInterface;
+
+/**
+ * Renders JavaScript assets.
+ */
+class JsCollectionRenderer implements AssetCollectionRendererInterface {
+
+  /**
+   * The state key/value store.
+   *
+   * @var \Drupal\Core\State\StateInterface
+   */
+  protected $state;
+
+  /**
+   * Constructs a JsCollectionRenderer.
+   *
+   * @param \Drupal\Core\State\StateInterface $state
+   *   The state key/value store.
+   */
+  public function __construct(StateInterface $state) {
+    $this->state = $state;
+  }
+
+  /**
+   * {@inheritdoc}
+   *
+   * This class evaluates the aggregation enabled/disabled condition on a group
+   * by group basis by testing whether an aggregate file has been made for the
+   * group rather than by testing the site-wide aggregation setting. This allows
+   * this class to work correctly even if modules have implemented custom
+   * logic for grouping and aggregating files.
+   */
+  public function render(array $js_assets) {
+    $elements = [];
+
+    // A dummy query-string is added to filenames, to gain control over
+    // browser-caching. The string changes on every update or full cache
+    // flush, forcing browsers to load a new copy of the files, as the
+    // URL changed. Files that should not be cached get REQUEST_TIME as
+    // query-string instead, to enforce reload on every page request.
+    $default_query_string = $this->state->get('system.css_js_query_string') ?: '0';
+
+    // Defaults for each SCRIPT element.
+    $element_defaults = [
+      '#type' => 'html_tag',
+      '#tag' => 'script',
+      '#value' => '',
+    ];
+
+    // Loop through all JS assets.
+    foreach ($js_assets as $js_asset) {
+      // Element properties that do not depend on JS asset type.
+      $element = $element_defaults;
+      $element['#browsers'] = $js_asset['browsers'];
+
+      // Element properties that depend on item type.
+      switch ($js_asset['type']) {
+        case 'setting':
+          $element['#attributes'] = [
+            // This type attribute prevents this from being parsed as an
+            // inline script.
+            'type' => 'application/json',
+            'data-drupal-selector' => 'drupal-settings-json',
+          ];
+          $element['#value'] = Json::encode($js_asset['data']);
+          break;
+
+        case 'file':
+          $query_string = $js_asset['version'] == -1 ? $default_query_string : 'v=' . $js_asset['version'];
+          $query_string_separator = (strpos($js_asset['data'], '?') !== FALSE) ? '&' : '?';
+          $element['#attributes']['src'] = file_url_transform_relative(file_create_url($js_asset['data']));
+          // Only add the cache-busting query string if this isn't an aggregate
+          // file.
+          if (!isset($js_asset['preprocessed'])) {
+            $element['#attributes']['src'] .= $query_string_separator . ($js_asset['cache'] ? $query_string : REQUEST_TIME);
+          }
+          break;
+
+        case 'external':
+          $element['#attributes']['src'] = $js_asset['data'];
+          break;
+
+        default:
+          throw new \Exception('Invalid JS asset type.');
+      }
+
+      // Attributes may only be set if this script is output independently.
+      if (!empty($element['#attributes']['src']) && !empty($js_asset['attributes'])) {
+        $element['#attributes'] += $js_asset['attributes'];
+      }
+
+      $elements[] = $element;
+    }
+
+    return $elements;
+  }
+
+}