From ec023d564c87af792043178bc192a4f8e1b0e411 Mon Sep 17 00:00:00 2001
From: Alexander Ebert <ebert@woltlab.com>
Date: Sun, 24 Jul 2016 13:15:43 +0200
Subject: [PATCH] Discarding bbcode content if it matches the first attribute

---
 .../node/HtmlInputNodeWoltlabMetacode.class.php   | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/wcfsetup/install/files/lib/system/html/input/node/HtmlInputNodeWoltlabMetacode.class.php b/wcfsetup/install/files/lib/system/html/input/node/HtmlInputNodeWoltlabMetacode.class.php
index d0874ddc4a..e3e46b7ee5 100644
--- a/wcfsetup/install/files/lib/system/html/input/node/HtmlInputNodeWoltlabMetacode.class.php
+++ b/wcfsetup/install/files/lib/system/html/input/node/HtmlInputNodeWoltlabMetacode.class.php
@@ -1,9 +1,11 @@
 <?php
 namespace wcf\system\html\input\node;
+use wcf\data\bbcode\BBCodeCache;
 use wcf\system\bbcode\BBCodeHandler;
 use wcf\system\html\metacode\converter\IMetacodeConverter;
 use wcf\system\html\node\AbstractHtmlNodeProcessor;
 use wcf\util\DOMUtil;
+use wcf\util\StringUtil;
 
 /**
  * Processes `<woltlab-metacode>` and converts them if appropriate.
@@ -91,6 +93,19 @@ class HtmlInputNodeWoltlabMetacode extends AbstractHtmlInputNode {
 			}
 			
 			if ($converter === null) {
+				// check if the bbcode's content should be used as first attribute and it
+				// matches the elements content
+				$bbcode = BBCodeCache::getInstance()->getBBCodeByTag($name);
+				if ($bbcode !== null) {
+					$bbcodeAttributes = $bbcode->getAttributes();
+					$attr = (isset($bbcodeAttributes[0])) ? $bbcodeAttributes[0] : null;
+					
+					if ($attr !== null && $attr->useText && !empty($attributes[0]) && StringUtil::trim($attributes[0]) == StringUtil::trim($element->textContent)) {
+						// discard content as it is already present in the first attribute
+						$element->textContent = '';
+					}
+				}
+				
 				// no available converter, metacode will be handled during output generation
 				continue;
 			}
-- 
2.20.1