Add possibility to install Orion plugins for the CHE editor

plugins/plugin-orion/che-plugin-orion-editor/src/main/java/org/eclipse/che/ide/editor/orion/client/inject/OrionCodeEditWidgetProvider.java

@@ -10,13 +10,19 @@
  *******************************************************************************/
 package org.eclipse.che.ide.editor.orion.client.inject;
 
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.core.client.JavaScriptObject;
+import com.google.gwt.core.client.JsArrayString;
 import com.google.inject.Inject;
 import com.google.inject.Provider;
 import com.google.inject.Singleton;
 
 import org.eclipse.che.ide.editor.orion.client.jso.OrionCodeEditWidgetOverlay;
 import org.eclipse.che.ide.requirejs.ModuleHolder;
 
+import java.util.HashSet;
+import java.util.Set;
+
 /**
  * Provider of Orion CodeEdit widget instance.
  *
@@ -26,18 +32,32 @@
 public class OrionCodeEditWidgetProvider implements Provider<OrionCodeEditWidgetOverlay> {
 
     private final ModuleHolder               moduleHolder;
+    private final Set<OrionPlugin>           orionPlugins;
     private       OrionCodeEditWidgetOverlay orionCodeEditWidgetOverlay;
 
     @Inject
     public OrionCodeEditWidgetProvider(ModuleHolder moduleHolder) {
         this.moduleHolder = moduleHolder;
+        orionPlugins = new HashSet<>();
+    }
+
+    @Inject(optional = true)
+    private void registerPlugins(Set<OrionPlugin> plugins) {
+        for (OrionPlugin registrar : plugins) {
+            orionPlugins.add(registrar);
+        }
     }
 
     @Override
     public OrionCodeEditWidgetOverlay get() {
         if (orionCodeEditWidgetOverlay == null) {
+            JsArrayString plugins = JavaScriptObject.createArray().cast();
+            for (OrionPlugin orionPlugin : orionPlugins) {
+                plugins.push(GWT.getModuleBaseURL() + orionPlugin.getRelPath());
+            }
+
             OrionCodeEditWidgetOverlay codeEditWidgetModule = moduleHolder.getModule("CodeEditWidget").cast();
-            orionCodeEditWidgetOverlay = codeEditWidgetModule.create();
+            orionCodeEditWidgetOverlay = codeEditWidgetModule.create(plugins);
         }
         return orionCodeEditWidgetOverlay;
     }

plugins/plugin-orion/che-plugin-orion-editor/src/main/java/org/eclipse/che/ide/editor/orion/client/inject/OrionPlugin.java

@@ -0,0 +1,25 @@
+/*******************************************************************************
+ * Copyright (c) 2012-2016 Codenvy, S.A.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *   Codenvy, S.A. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.che.ide.editor.orion.client.inject;
+
+/**
+ * Interface for providing information needed for registering Orion plugin.
+ * <p>
+ * Implementations of this interface need to be registered using
+ * a multibinder in order to be picked-up by CHE.
+ *
+ * @author Artem Zatsarynnyi
+ */
+public interface OrionPlugin {
+
+    /** Returns path to the Orion plugin's html file. Path should be relative to the GWT's 'public' folder. */
+    String getRelPath();
+}

plugins/plugin-orion/che-plugin-orion-editor/src/main/java/org/eclipse/che/ide/editor/orion/client/jso/OrionCodeEditWidgetOverlay.java

@@ -11,6 +11,7 @@
 package org.eclipse.che.ide.editor.orion.client.jso;
 
 import com.google.gwt.core.client.JavaScriptObject;
+import com.google.gwt.core.client.JsArrayString;
 import com.google.gwt.dom.client.Element;
 
 import org.eclipse.che.api.promises.client.Promise;
@@ -25,9 +26,14 @@ public class OrionCodeEditWidgetOverlay extends JavaScriptObject {
     protected OrionCodeEditWidgetOverlay() {
     }
 
-    /** Creates an Orion CodeEdit widget instance. */
-    public final native OrionCodeEditWidgetOverlay create() /*-{
-        return new this();
+    /**
+     * Creates an Orion CodeEdit widget instance.
+     *
+     * @param plugins
+     *         array of URLs of plugins that should be installed before CodeEdit widget initialization
+     */
+    public final native OrionCodeEditWidgetOverlay create(JsArrayString plugins) /*-{
+        return new this({userPlugins: plugins});
     }-*/;
 
     /**
@@ -43,10 +49,10 @@ public final native Promise<OrionEditorViewOverlay> createEditorView(final Eleme
         options.parent = element;
         return this.create(options);
     }-*/;
-    
+
     /**
      * Provides Access to Orion's service registry.
-     * 
+     *
      * @return the service registry
      */
     public final native OrionServiceRegistryOverlay getServiceRegistry() /*-{