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#ifndef nsIAnonymousContentCreator_h___
#define nsIAnonymousContentCreator_h___

#include "nsISupports.h"
#include "nsIContent.h"
#include "nsCOMPtr.h"

class nsIPresContext;
class nsISupportsArray;
class nsIAtom;
class nsIStyleContext;
class nsIFrame;


// {41a69e00-2d6d-11d3-b033-a1357139787c}
#define NS_IANONYMOUS_CONTENT_CREATOR_IID { 0x41a69e00, 0x2d6d, 0x11d3, { 0xb0, 0x33, 0xa1, 0x35, 0x71, 0x39, 0x78, 0x7c } }


/**
 * Any source for anonymous content can implement this interface to provide it.
 * HTML frames like nsFileControlFrame currently use this as well as XUL frames
 * like nsScrollbarFrame & nsSliderFrame.
 */
class nsIAnonymousContentCreator : public nsISupports {
public:
     static const nsIID& GetIID() { static nsIID iid = NS_IANONYMOUS_CONTENT_CREATOR_IID; return iid; }
     NS_IMETHOD CreateAnonymousContent(nsIPresContext* aPresContext,
                                       nsISupportsArray& aAnonymousItems)=0;

     // If the creator doesn't want to create special fframe ro frame hierarchy
     // then it should null out the style content arg and return NS_ERROR_FAILURE
     NS_IMETHOD CreateFrameFor(nsIPresContext*   aPresContext,
                               nsIContent *      aContent,
                               nsIFrame**        aFrame)=0;
};

nsresult NS_CreateAnonymousNode(nsIContent* aParent, nsIAtom* aTag, PRInt32 aNameSpaceId, nsCOMPtr<nsIContent>& aNewNode);


#endif