20220717

vendor/league/commonmark/src/Extension/DefaultAttributes/ApplyDefaultAttributesProcessor.php

@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the league/commonmark package.
+ *
+ * (c) Colin O'Dell <colinodell@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace League\CommonMark\Extension\DefaultAttributes;
+
+use League\CommonMark\Event\DocumentParsedEvent;
+use League\CommonMark\Extension\Attributes\Util\AttributesHelper;
+use League\Config\ConfigurationAwareInterface;
+use League\Config\ConfigurationInterface;
+
+final class ApplyDefaultAttributesProcessor implements ConfigurationAwareInterface
+{
+    private ConfigurationInterface $config;
+
+    public function onDocumentParsed(DocumentParsedEvent $event): void
+    {
+        /** @var array<string, array<string, mixed>> $map */
+        $map = $this->config->get('default_attributes');
+
+        // Don't bother iterating if no default attributes are configured
+        if (! $map) {
+            return;
+        }
+
+        foreach ($event->getDocument()->iterator() as $node) {
+            // Check to see if any default attributes were defined
+            if (($attributesToApply = $map[\get_class($node)] ?? []) === []) {
+                continue;
+            }
+
+            $newAttributes = [];
+            foreach ($attributesToApply as $name => $value) {
+                if (\is_callable($value)) {
+                    $value = $value($node);
+                    // Callables are allowed to return `null` indicating that no changes should be made
+                    if ($value !== null) {
+                        $newAttributes[$name] = $value;
+                    }
+                } else {
+                    $newAttributes[$name] = $value;
+                }
+            }
+
+            // Merge these attributes into the node
+            if (\count($newAttributes) > 0) {
+                $node->data->set('attributes', AttributesHelper::mergeAttributes($node, $newAttributes));
+            }
+        }
+    }
+
+    public function setConfiguration(ConfigurationInterface $configuration): void
+    {
+        $this->config = $configuration;
+    }
+}