1 files changed, 45 insertions, 0 deletions
diff --git a/platform/platform-impl/src/com/intellij/ide/file/BatchFileChangeListener.java b/platform/platform-impl/src/com/intellij/ide/file/BatchFileChangeListener.java
new file mode 100644
index 000000000000..593c39885a46
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+++ b/platform/platform-impl/src/com/intellij/ide/file/BatchFileChangeListener.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2000-2014 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.ide.file;
+
+import com.intellij.openapi.project.Project;
+import com.intellij.util.messages.Topic;
+
+/**
+ * This listener is notified when some operation performs a massive batch file change, and when this change is completed.
+ * <p/>
+ * To subscribe to such batch file changes, connect to the Project's {@link com.intellij.util.messages.MessageBus}
+ * via the {@link #TOPIC} defined below.
+ */
+public interface BatchFileChangeListener {
+
+  Topic<BatchFileChangeListener> TOPIC = Topic.create("Batch File Update", BatchFileChangeListener.class);
+
+  class Adapter implements BatchFileChangeListener {
+    @Override
+    public void batchChangeStarted(Project project) {
+    }
+    @Override
+    public void batchChangeCompleted(Project project) {
+    }
+  }
+
+
+  void batchChangeStarted(Project project);
+
+  void batchChangeCompleted(Project project);
+
+}