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-rw-r--r--widget/cocoa/nsChangeObserver.h44
1 files changed, 44 insertions, 0 deletions
diff --git a/widget/cocoa/nsChangeObserver.h b/widget/cocoa/nsChangeObserver.h
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+/* -*- 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 nsIDocument;
+class nsIAtom;
+
+#define NS_DECL_CHANGEOBSERVER \
+void ObserveAttributeChanged(nsIDocument *aDocument, nsIContent *aContent, nsIAtom *aAttribute) override; \
+void ObserveContentRemoved(nsIDocument *aDocument, nsIContent *aChild, int32_t aIndexInContainer) override; \
+void ObserveContentInserted(nsIDocument *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(nsIDocument* aDocument,
+ nsIContent* aContent,
+ nsIAtom* aAttribute)=0;
+
+ virtual void ObserveContentRemoved(nsIDocument* aDocument,
+ nsIContent* aChild,
+ int32_t aIndexInContainer)=0;
+
+ virtual void ObserveContentInserted(nsIDocument* aDocument,
+ nsIContent* aContainer,
+ nsIContent* aChild)=0;
+};
+
+#endif // nsChangeObserver_h_