XRENDERING-612: Mailto links are incorrectly parsed

* Recognize mailto: links in XHTMLXWikiGeneratorListener
* Add the test case from XRENDERING-612

xwiki-rendering-syntaxes/xwiki-rendering-syntax-xhtml/src/main/java/org/xwiki/rendering/internal/parser/xhtml/wikimodel/XHTMLXWikiGeneratorListener.java

@@ -66,6 +66,13 @@ public class XHTMLXWikiGeneratorListener extends DefaultXWikiGeneratorListener
      */
     private static final Pattern URL_SCHEME_PATTERN = Pattern.compile("[a-zA-Z0-9+.-]*://");
 
+    /**
+     * Prefix for mailto-links.
+     *
+     * @since 14.0RC1
+     */
+    private static final String MAILTO_PREFIX = "mailto:";
+
     private static final String CLASS_ATTRIBUTE = "class";
 
     /**
@@ -142,7 +149,9 @@ public void onImage(WikiReference reference)
      * <ul>
      *   <li>UC1: the reference points to a valid URL, we return a reference of type "url",
      *       e.g. {@code http://server/path/reference#anchor}</li>
-     *   <li>UC2: the reference is not a valid URL, we return a reference of type "path",
+     *   <li>UC2: the reference is a mailto: link, we return a reference of type "mailto",
+     *       e.g., {@code mailto:user@example.com}</li>
+     *   <li>UC3: the reference is not a valid URL, we return a reference of type "path",
      *       e.g. {@code path/reference#anchor}</li>
      * </ul>
      *
@@ -158,8 +167,11 @@ private ResourceReference computeResourceReference(String rawReference)
         if (matcher.lookingAt()) {
             // We have UC1
             reference = new ResourceReference(rawReference, ResourceType.URL);
-        } else {
+        } else if (rawReference.startsWith(MAILTO_PREFIX)) {
             // We have UC2
+            reference = new ResourceReference(rawReference.substring(MAILTO_PREFIX.length()), ResourceType.MAILTO);
+        } else {
+            // We have UC3
             reference = new ResourceReference(rawReference, ResourceType.PATH);
         }
 

xwiki-rendering-syntaxes/xwiki-rendering-syntax-xhtml/src/test/resources/xhtml10/specific/link/link6.test

+.#-----------------------------------------------------
+.input|xhtml/1.0
+.#-----------------------------------------------------
+<p>one <a href="mailto:john@doe.com">two</a> three</p>
+.#-----------------------------------------------------
+.expect|event/1.0
+.#-----------------------------------------------------
+beginDocument
+beginParagraph
+onWord [one]
+onSpace
+beginLink [Typed = [true] Type = [mailto] Reference = [john@doe.com]] [false]
+onWord [two]
+endLink [Typed = [true] Type = [mailto] Reference = [john@doe.com]] [false]
+onSpace
+onWord [three]
+endParagraph
+endDocument
\ No newline at end of file