fix #2299 add fe:message

src/main/java/org/codelibs/fess/taglib/FessFunctions.java

@@ -399,4 +399,9 @@ public class FessFunctions {
         }
         return "<pre class=\"" + style + " linenums:" + lineNum + "\">" + content + "</pre>";
     }
+
+    public static String getMessage(final String key, final String defaultValue) {
+        final Locale locale = LaRequestUtil.getOptionalRequest().map(HttpServletRequest::getLocale).orElse(Locale.ROOT);
+        return ComponentUtil.getMessageManager().findMessage(locale, key).orElse(defaultValue);
+    }
 }

src/main/webapp/WEB-INF/fe.tld

@@ -257,4 +257,12 @@
     <function-signature>java.lang.String formatCode(java.lang.String, java.lang.String, java.lang.String, java.lang.String)</function-signature>
     <example>${fe:formatCode("L", "prettyprint", doc.mimetype, doc.content_description)}</example>
   </function>
+
+  <function>
+    <description>Get a message from properties files.</description>
+    <name>message</name>
+    <function-class>org.codelibs.fess.taglib.FessFunctions</function-class>
+    <function-signature>java.lang.String getMessage(java.lang.String, java.lang.String)</function-signature>
+    <example>${fe:message("labels.foobar", "default value")}</example>
+  </function>
 </taglib>