Add Editor:onDidSave

src/editor.coffee

@@ -257,6 +257,16 @@ class Editor extends Model
   onDidInsertText: (callback) ->
     @emitter.on 'did-insert-text', callback
 
+  # Public: Invoke the given callback after the buffer is saved to disk.
+  #
+  # * `callback` {Function} to be called after the buffer is saved.
+  #   * `event` {Object} with the following keys:
+  #     * `path` The path to which the buffer was saved.
+  #
+  # Returns a {Disposable} on which `.dispose()` can be called to unsubscribe.
+  onDidSave: (callback) ->
+    @getBuffer().onDidSave(callback)
+
   # Extended: Calls your `callback` when a {Cursor} is added to the editor.
   # Immediately calls your callback for each existing cursor.
   #