widget/src/cocoa/nsChangeObserver.h

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  25  *   Josh Aas <josh@mozilla.com> (decomtaminate)
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  40
  41 #ifndef nsChangeObserver_h_
  42 #define nsChangeObserver_h_
  43
  44 class nsIContent;
  45 class nsIDocument;
  46 class nsIAtom;
  47
  48 #define NS_DECL_CHANGEOBSERVER \
  49 void ObserveAttributeChanged(nsIDocument *aDocument, nsIContent *aContent, nsIAtom *aAttribute); \
  50 void ObserveContentRemoved(nsIDocument *aDocument, nsIContent *aChild, PRInt32 aIndexInContainer); \
  51 void ObserveContentInserted(nsIDocument *aDocument, nsIContent *aChild, PRInt32 aIndexInContainer);
  52
  53 // Something that wants to be alerted to changes in attributes or changes in
  54 // its corresponding content object.
  55 //
  56 // This interface is used by our menu code so we only have to have one
  57 // nsIDocumentObserver.
  58 //
  59 // Any class that implements this interface must take care to unregister itself
  60 // on deletion.
  61 class nsChangeObserver
  62 {
  63 public:
  64   // XXX use dom::Element
  65   virtual void ObserveAttributeChanged(nsIDocument* aDocument,
  66                                        nsIContent* aContent,
  67                                        nsIAtom* aAttribute)=0;
  68
  69   virtual void ObserveContentRemoved(nsIDocument* aDocument,
  70                                      nsIContent* aChild,
  71                                      PRInt32 aIndexInContainer)=0;
  72
  73   virtual void ObserveContentInserted(nsIDocument* aDocument,
  74                                       nsIContent* aChild,
  75                                       PRInt32 aIndexInContainer)=0;
  76 };
  77
  78 #endif // nsChangeObserver_h_