michael@0: /* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  *
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef nsChangeObserver_h_
michael@0: #define nsChangeObserver_h_
michael@0: 
michael@0: class nsIContent;
michael@0: class nsIDocument;
michael@0: class nsIAtom;
michael@0: 
michael@0: #define NS_DECL_CHANGEOBSERVER \
michael@0: void ObserveAttributeChanged(nsIDocument *aDocument, nsIContent *aContent, nsIAtom *aAttribute); \
michael@0: void ObserveContentRemoved(nsIDocument *aDocument, nsIContent *aChild, int32_t aIndexInContainer); \
michael@0: void ObserveContentInserted(nsIDocument *aDocument, nsIContent* aContainer, nsIContent *aChild);
michael@0: 
michael@0: // Something that wants to be alerted to changes in attributes or changes in
michael@0: // its corresponding content object.
michael@0: //
michael@0: // This interface is used by our menu code so we only have to have one
michael@0: // nsIDocumentObserver.
michael@0: //
michael@0: // Any class that implements this interface must take care to unregister itself
michael@0: // on deletion.
michael@0: class nsChangeObserver
michael@0: {
michael@0: public:
michael@0:   // XXX use dom::Element
michael@0:   virtual void ObserveAttributeChanged(nsIDocument* aDocument,
michael@0:                                        nsIContent* aContent,
michael@0:                                        nsIAtom* aAttribute)=0;
michael@0: 
michael@0:   virtual void ObserveContentRemoved(nsIDocument* aDocument,
michael@0:                                      nsIContent* aChild, 
michael@0:                                      int32_t aIndexInContainer)=0;
michael@0: 
michael@0:   virtual void ObserveContentInserted(nsIDocument* aDocument,
michael@0:                                       nsIContent* aContainer,
michael@0:                                       nsIContent* aChild)=0;
michael@0: };
michael@0: 
michael@0: #endif // nsChangeObserver_h_