allow hiding project generators

platform/platform-impl/src/com/intellij/platform/HideableProjectGenerator.java

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2000-2012 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.platform;
+
+/**
+ * @author Dennis.Ushakov
+ */
+public interface HideableProjectGenerator {
+  boolean isHidden();
+}

platform/platform-impl/src/com/intellij/platform/NewDirectoryProjectDialog.java

@@ -79,6 +79,11 @@ public class NewDirectoryProjectDialog extends DialogWrapper {
       List<DirectoryProjectGenerator> primaryGenerators = ContainerUtil.newArrayList();
       List<DirectoryProjectGenerator> otherGenerators = ContainerUtil.newArrayList();
       for (DirectoryProjectGenerator generator : generators) {
+        if (generator instanceof HideableProjectGenerator) {
+          if (((HideableProjectGenerator)generator).isHidden()) {
+            continue;
+          }
+        }
         boolean primary = true;
         if (generator instanceof WebProjectGenerator) {
           primary = ((WebProjectGenerator) generator).isPrimaryGenerator();