(refs #464)Add extension point to inject JavaScript instead of adding button

src/main/scala/plugin/Plugin.scala

@@ -14,7 +14,7 @@ trait Plugin {
   def globalMenus           : List[GlobalMenu]
   def repositoryActions     : List[RepositoryAction]
   def globalActions         : List[Action]
-  def buttons(name: String) : List[Button]
+  def javaScripts           : List[JavaScript]
 }
 
 object PluginConnectionHolder {

src/main/scala/plugin/PluginSystem.scala

@@ -85,7 +85,7 @@ object PluginSystem {
   def globalMenus           : List[GlobalMenu]       = pluginsMap.values.flatMap(_.globalMenus).toList
   def repositoryActions     : List[RepositoryAction] = pluginsMap.values.flatMap(_.repositoryActions).toList
   def globalActions         : List[Action]           = pluginsMap.values.flatMap(_.globalActions).toList
-  def buttons(name: String) : List[Button]           = pluginsMap.values.flatMap(_.buttons(name)).toList
+  def javaScripts           : List[JavaScript]       = pluginsMap.values.flatMap(_.javaScripts).toList
 
   // Case classes to hold plug-ins information internally in GitBucket
   case class PluginRepository(id: String, url: String)
@@ -94,6 +94,7 @@ object PluginSystem {
   case class Action(path: String, function: (HttpServletRequest, HttpServletResponse) => Any)
   case class RepositoryAction(path: String, function: (HttpServletRequest, HttpServletResponse, RepositoryInfo) => Any)
   case class Button(label: String, href: String)
+  case class JavaScript(filter: String => Boolean, script: String)
 
   /**
    * Checks whether the plugin is updatable.

src/main/scala/plugin/ScalaPlugin.scala

@@ -18,13 +18,13 @@ class ScalaPlugin(val id: String, val version: String,
   private val globalMenuList       = ListBuffer[GlobalMenu]()
   private val repositoryActionList = ListBuffer[RepositoryAction]()
   private val globalActionList     = ListBuffer[Action]()
-  private val buttonMap            = MutableMap[String, ListBuffer[Button]]()
+  private val javaScriptList       = ListBuffer[JavaScript]()
 
   def repositoryMenus       : List[RepositoryMenu]   = repositoryMenuList.toList
   def globalMenus           : List[GlobalMenu]       = globalMenuList.toList
   def repositoryActions     : List[RepositoryAction] = repositoryActionList.toList
   def globalActions         : List[Action]           = globalActionList.toList
-  def buttons(name: String) : List[Button]           = buttonMap.get(name).map(_.toList).getOrElse(Nil)
+  def javaScripts           : List[JavaScript]       = javaScriptList.toList
 
   def addRepositoryMenu(label: String, name: String, url: String, icon: String)(condition: (Context) => Boolean): Unit = {
     repositoryMenuList += RepositoryMenu(label, name, url, icon, condition)
@@ -42,12 +42,8 @@ class ScalaPlugin(val id: String, val version: String,
     repositoryActionList += RepositoryAction(path, function)
   }
 
-  def addButton(name: String, label: String, href: String): Unit = {
-    if(!buttonMap.contains(name)){
-      buttonMap.put(name, ListBuffer[Button]())
-    }
-    val list = buttonMap(name)
-    list += Button(label, href)
+  def addJavaScript(filter: String => Boolean, script: String): Unit = {
+    javaScriptList += JavaScript(filter, script)
   }
 
 }