Allow quoting article contents

com.woltlab.wcf/objectType.xml

@@ -71,6 +71,11 @@
 			<definitionname>com.woltlab.wcf.message</definitionname>
 			<enableToc>1</enableToc>
 		</type>
+		<type>
+			<name>com.woltlab.wcf.article.content</name>
+			<definitionname>com.woltlab.wcf.message.quote</definitionname>
+			<classname>wcf\system\message\quote\ArticleContentMessageQuoteHandler</classname>
+		</type>
 		<type>
 			<name>com.woltlab.wcf.article</name>
 			<definitionname>com.woltlab.wcf.label.object</definitionname>

com.woltlab.wcf/templates/article.tpl

@@ -67,6 +67,7 @@
 
 <div
 	class="section entry article"
+	data-object-id="{$articleContent->articleContentID}"
 >
 	{if $articleContent->getImage() && $articleContent->getImage()->hasThumbnail('large')}
 		<div
@@ -256,4 +257,10 @@
 
 {unsafe:$article->getDiscussionProvider()->renderDiscussions()}
 
+<script data-relocate="true">
+	require(["WoltLabSuite/Core/Component/Quote/Message"], ({ registerContainer }) => {
+		registerContainer(".entry.article", ".entry__content", "com.woltlab.wcf.article.content");
+	});
+</script>
+
 {include file='footer'}

wcfsetup/install/files/lib/data/article/content/ArticleContent.class.php

@@ -5,6 +5,7 @@
 use wcf\data\article\Article;
 use wcf\data\attachment\Attachment;
 use wcf\data\CollectionDatabaseObject;
+use wcf\data\IMessage;
 use wcf\data\ITitledLinkObject;
 use wcf\data\language\Language;
 use wcf\data\media\ViewableMedia;
@@ -42,7 +43,7 @@
  *
  * @extends CollectionDatabaseObject<ArticleContentCollection>
  */
-class ArticleContent extends CollectionDatabaseObject implements ITitledLinkObject, IRouteController
+class ArticleContent extends CollectionDatabaseObject implements IMessage, ITitledLinkObject, IRouteController
 {
     /**
      * @inheritDoc
@@ -138,6 +139,78 @@ public function getArticle(): Article
         return $this->getCollection()->getArticle($this);
     }
 
+    /**
+     * @since 6.3
+     */
+    #[\Override]
+    public function getExcerpt(int $maxLength = 255): string
+    {
+        return StringUtil::truncateHTML($this->getSimplifiedFormattedContent(), $maxLength);
+    }
+
+    /**
+     * @since 6.3
+     */
+    #[\Override]
+    public function getFormattedMessage(): string
+    {
+        return $this->getFormattedContent();
+    }
+
+    /**
+     * @since 6.3
+     */
+    #[\Override]
+    public function getMessage(): string
+    {
+        return $this->content ?? '';
+    }
+
+    /**
+     * @since 6.3
+     */
+    #[\Override]
+    public function isVisible(): bool
+    {
+        return $this->getArticle()->canRead();
+    }
+
+    /**
+     * @since 6.3
+     */
+    #[\Override]
+    public function getTime(): int
+    {
+        return $this->getArticle()->getTime();
+    }
+
+    /**
+     * @since 6.3
+     */
+    #[\Override]
+    public function getUserID(): ?int
+    {
+        return $this->getArticle()->getUserID();
+    }
+
+    /**
+     * @since 6.3
+     */
+    #[\Override]
+    public function getUsername(): string
+    {
+        return $this->getArticle()->getUsername();
+    }
+
+    /**
+     * @since 6.3
+     */
+    #[\Override]
+    public function __toString(): string
+    {
+        return $this->getFormattedContent();
+    }
+
     /**
      * Returns the language of this article content or `null` if no language has been specified.
      */

wcfsetup/install/files/lib/system/message/quote/ArticleContentMessageQuoteHandler.class.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace wcf\system\message\quote;
+
+use wcf\data\article\content\ArticleContent;
+use wcf\data\IMessage;
+
+/**
+ * IMessageQuoteHandler implementation for article contents.
+ *
+ * @author      Marcel Werk
+ * @copyright   2001-2026 WoltLab GmbH
+ * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since       6.3
+ */
+final class ArticleContentMessageQuoteHandler extends AbstractMessageQuoteHandler
+{
+    #[\Override]
+    public function getMessage(int $objectID): ?IMessage
+    {
+        $articleContent = new ArticleContent($objectID);
+        if ($articleContent->isNil()) {
+            return null;
+        }
+
+        if (!$articleContent->isVisible()) {
+            return null;
+        }
+
+        return $articleContent;
+    }
+}