Add new extension point to add TextDecorator.

build.sbt

@@ -45,6 +45,7 @@ libraryDependencies ++= Seq(
   "com.typesafe"              % "config"                       % "1.3.0",
   "com.typesafe.akka"        %% "akka-actor"                   % "2.3.15",
   "fr.brouillard.oss.security.xhub" % "xhub4j-core"            % "1.0.0",
+  "org.jsoup"                 % "jsoup"                        % "1.9.2",
   "com.enragedginger"        %% "akka-quartz-scheduler"        % "1.4.0-akka-2.3.x" exclude("c3p0","c3p0"),
   "org.eclipse.jetty"         % "jetty-webapp"                 % JettyVersion     % "provided",
   "javax.servlet"             % "javax.servlet-api"            % "3.1.0"          % "provided",

src/main/scala/gitbucket/core/plugin/Plugin.scala

@@ -149,6 +149,16 @@ abstract class Plugin {
    */
   def dashboardTabs(registry: PluginRegistry, context: ServletContext, settings: SystemSettings): Seq[(Context) => Option[Link]] = Nil
 
+  /**
+   * Override to add text decorators.
+   */
+  val textDecorators: Seq[TextDecorator] = Nil
+
+  /**
+   * Override to add text decorators.
+   */
+  def textDecorators(registry: PluginRegistry, context: ServletContext, settings: SystemSettings): Seq[TextDecorator] = Nil
+
   /**
    * This method is invoked in initialization of plugin system.
    * Register plugin functionality to PluginRegistry.
@@ -193,6 +203,9 @@ abstract class Plugin {
     (dashboardTabs ++ dashboardTabs(registry, context, settings)).foreach { dashboardTab =>
       registry.addDashboardTab(dashboardTab)
     }
+    (textDecorators ++ textDecorators(registry, context, settings)).foreach { textDecorator =>
+      registry.addTextDecorator(textDecorator)
+    }
   }
 
   /**

src/main/scala/gitbucket/core/plugin/PluginRegistory.scala

@@ -42,6 +42,8 @@ class PluginRegistry {
   private val systemSettingMenus = new ListBuffer[(Context) => Option[Link]]
   private val accountSettingMenus = new ListBuffer[(Context) => Option[Link]]
   private val dashboardTabs = new ListBuffer[(Context) => Option[Link]]
+  private val textDecorators = new ListBuffer[TextDecorator]
+  textDecorators += new EmojiDecorator()
 
   def addPlugin(pluginInfo: PluginInfo): Unit = {
     plugins += pluginInfo
@@ -159,6 +161,12 @@ class PluginRegistry {
 
   def getDashboardTabs: Seq[(Context) => Option[Link]] = dashboardTabs.toSeq
 
+  def addTextDecorator(textDecorator: TextDecorator): Unit = {
+    textDecorators += textDecorator
+  }
+
+  def getTextDecorators: Seq[TextDecorator] = textDecorators.toSeq
+
 }
 
 /**

src/main/scala/gitbucket/core/plugin/TextDecorator.scala

@@ -0,0 +1,20 @@
+package gitbucket.core.plugin
+
+import gitbucket.core.controller.Context
+import gitbucket.core.service.RepositoryService.RepositoryInfo
+import gitbucket.core.util.EmojiUtil
+
+trait TextDecorator {
+
+  def decorate(text: String)(implicit context: Context): String
+
+  def decorate(text: String, repositoryInfo: RepositoryInfo)(implicit context: Context): String = decorate(text)
+
+}
+
+class EmojiDecorator extends TextDecorator {
+
+  override def decorate(text: String)(implicit context: Context): String = EmojiUtil.convertEmojis(text)
+
+}
+

src/main/scala/gitbucket/core/view/Markdown.scala

@@ -6,7 +6,7 @@ import java.util.Locale
 
 import gitbucket.core.controller.Context
 import gitbucket.core.service.{RepositoryService, RequestCache}
-import gitbucket.core.util.{EmojiUtil, StringUtil}
+import gitbucket.core.util.StringUtil
 import io.github.gitbucket.markedj._
 import io.github.gitbucket.markedj.Utils._
 
@@ -44,7 +44,7 @@ object Markdown {
     val renderer = new GitBucketMarkedRenderer(options, repository,
       enableWikiLink, enableRefsLink, enableAnchor, enableTaskList, hasWritePermission, pages)
 
-    EmojiUtil.convertEmojis(Marked.marked(source, options, renderer))
+    helpers.decorateHtml(Marked.marked(source, options, renderer))
   }
 
   /**

src/main/scala/gitbucket/core/view/helpers.scala

@@ -7,7 +7,9 @@ import gitbucket.core.controller.Context
 import gitbucket.core.model.CommitState
 import gitbucket.core.plugin.{PluginRegistry, RenderRequest}
 import gitbucket.core.service.{RepositoryService, RequestCache}
-import gitbucket.core.util.{EmojiUtil, FileUtil, JGitUtil, StringUtil}
+import gitbucket.core.util.{FileUtil, JGitUtil, StringUtil}
+import org.jsoup.Jsoup
+import org.jsoup.nodes.{Element, Node}
 import play.twirl.api.{Html, HtmlFormat}
 
 /**
@@ -150,7 +152,7 @@ object helpers extends AvatarImageProvider with LinkConverter with RequestCache
    * Converts commit id, issue id and username to the link.
    */
   def link(value: String, repository: RepositoryService.RepositoryInfo)(implicit context: Context): Html =
-    Html(EmojiUtil.convertEmojis(convertRefsLinks(value, repository)))
+    Html(decorateHtml(convertRefsLinks(value, repository)))
 
   def cut(value: String, length: Int): String =
     if(value.length > length){
@@ -334,4 +336,33 @@ object helpers extends AvatarImageProvider with LinkConverter with RequestCache
 
     HtmlFormat.fill(out)
   }
+
+  /**
+   * Decorate text in HTML by TextDecorator.
+   *
+   * TODO Move to the other place.
+   */
+  def decorateHtml(text: String)(implicit context: Context): String = {
+    val textDecorators = PluginRegistry().getTextDecorators
+
+    def processNode(n: Node): Unit = {
+      n match {
+        case x: Element  => {
+          if(x.hasText && x.ownText.nonEmpty){
+            val text = textDecorators.foldLeft(x.ownText){ case (text, textDecorator) =>
+                textDecorator.decorate(text)
+            }
+            x.html(text)
+          }
+          x.children.toArray.foreach { c =>
+            processNode(c.asInstanceOf[Node])
+          }
+        }
+        case _ => ()
+      }
+    }
+    val body = Jsoup.parseBodyFragment(text).getElementsByTag("body").get(0)
+    processNode(body)
+    body.html
+  }
 }