1 files changed, 53 insertions, 0 deletions
diff --git a/widget/cocoa/nsChangeObserver.h b/widget/cocoa/nsChangeObserver.h
new file mode 100644
index 0000000000..696f0be87e
--- /dev/null
+++ b/widget/cocoa/nsChangeObserver.h
@@ -0,0 +1,53 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsChangeObserver_h_
+#define nsChangeObserver_h_
+
+class nsIContent;
+class nsAtom;
+namespace mozilla {
+namespace dom {
+class Document;
+}
+}  // namespace mozilla
+
+#define NS_DECL_CHANGEOBSERVER                                            \
+  void ObserveAttributeChanged(mozilla::dom::Document* aDocument,         \
+                               nsIContent* aContent, nsAtom* aAttribute)  \
+      override;                                                           \
+  void ObserveContentRemoved(mozilla::dom::Document* aDocument,           \
+                             nsIContent* aContainer, nsIContent* aChild,  \
+                             nsIContent* aPreviousChild) override;        \
+  void ObserveContentInserted(mozilla::dom::Document* aDocument,          \
+                              nsIContent* aContainer, nsIContent* aChild) \
+      override;
+
+// Something that wants to be alerted to changes in attributes or changes in
+// its corresponding content object.
+//
+// This interface is used by our menu code so we only have to have one
+// nsIDocumentObserver.
+//
+// Any class that implements this interface must take care to unregister itself
+// on deletion.
+class nsChangeObserver {
+ public:
+  // XXX use dom::Element
+  virtual void ObserveAttributeChanged(mozilla::dom::Document* aDocument,
+                                       nsIContent* aContent,
+                                       nsAtom* aAttribute) = 0;
+
+  virtual void ObserveContentRemoved(mozilla::dom::Document* aDocument,
+                                     nsIContent* aContainer, nsIContent* aChild,
+                                     nsIContent* aPreviousSibling) = 0;
+
+  virtual void ObserveContentInserted(mozilla::dom::Document* aDocument,
+                                      nsIContent* aContainer,
+                                      nsIContent* aChild) = 0;
+};
+
+#endif  // nsChangeObserver_h_