XWIKI-9370: PDF Export doesn't list the Table of Contents under certain circumstances

* Fix the xwiki-platform-feed-api build

xwiki-platform-core/pom.xml

@@ -374,7 +374,8 @@
             <difference>
               <differenceType>8001</differenceType>
               <className>com/xpn/xwiki/util/TidyMessageLogger</className>
-              <justification>We dropped Tidy in favor of HTMLCleaner.</justification>
+              <justification>Has been moved to xwiki-platform-feed-api since it was the only module using it. We also
+              dropped Tidy in favor of HTMLCleaner.</justification>
             </difference>
           </ignored>
           <excludes>

xwiki-platform-core/xwiki-platform-feed/xwiki-platform-feed-api/pom.xml

@@ -41,6 +41,11 @@
       <artifactId>xwiki-platform-oldcore</artifactId>
       <version>${project.version}</version>
     </dependency>
+    <dependency>
+      <groupId>net.sf.jtidy</groupId>
+      <artifactId>jtidy</artifactId>
+      <version>r938</version>
+    </dependency>
     <!-- RSS Feed processing -->
     <dependency>
       <groupId>rome</groupId>
@@ -88,7 +93,8 @@
             **/plugin/feed/SyndEntrySourceApi.java,
             **/plugin/feed/SyndEntrySource.java,
             **/plugin/feed/UpdateThread.java,
-            **/plugin/feed/XWikiFeedFetcher.java
+            **/plugin/feed/XWikiFeedFetcher.java,
+            **/util/TidyMessageLogger.java
           </excludes>
         </configuration>
       </plugin>

xwiki-platform-core/xwiki-platform-feed/xwiki-platform-feed-api/src/main/java/com/xpn/xwiki/util/TidyMessageLogger.java

+/*
+ * See the NOTICE file distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this software; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
+ */
+package com.xpn.xwiki.util;
+
+import org.slf4j.Logger;
+import org.w3c.tidy.TidyMessage;
+import org.w3c.tidy.TidyMessageListener;
+
+/**
+ * Utility class for logging JTidy messages.
+ */
+public class TidyMessageLogger implements TidyMessageListener
+{
+    private final Logger logger;
+
+    public TidyMessageLogger(Logger logger)
+    {
+        this.logger = logger;
+    }
+
+    @Override
+    public void messageReceived(TidyMessage message)
+    {
+        // All JTidy messages should be considered as DEBUG messages since they're not causing any problem with XWiki
+        // per see. However if the code calling Tidy need to do something different based on the fact that the
+        // tidying generated errors or warnings, it should act on tidy.getParseErrors() or tidy.getParseWarnings().
+        this.logger.debug("[JTidy] line {} column {} - {}", message.getLine(), message.getColumn(),
+            message.getMessage());
+    }
+}