nsiobserverservice.h

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/*
 * DO NOT EDIT.  THIS FILE IS GENERATED FROM nsIObserverService.idl
 */

#ifndef __gen_nsIObserverService_h__
#define __gen_nsIObserverService_h__


#ifndef __gen_nsISupports_h__
#include "nsISupports.h"
#endif

/* For IDL files that don't want to include root IDL files. */
#ifndef NS_NO_VTABLE
#define NS_NO_VTABLE
#endif
class nsIObserver; /* forward declaration */

class nsISimpleEnumerator; /* forward declaration */


/* starting interface:    nsIObserverService */
#define NS_IOBSERVERSERVICE_IID_STR "d07f5192-e3d1-11d2-8acd-00105a1b8860"

#define NS_IOBSERVERSERVICE_IID \
  {0xd07f5192, 0xe3d1, 0x11d2, \
    { 0x8a, 0xcd, 0x00, 0x10, 0x5a, 0x1b, 0x88, 0x60 }}

/**
 * nsIObserverService
 * 
 * Service allows a client listener (nsIObserver) to register and unregister for 
 * notifications of specific string referenced topic. Service also provides a 
 * way to notify registered listeners and a way to enumerate registered client 
 * listeners.
 * 
 * @status FROZEN
 */
class NS_NO_VTABLE nsIObserverService : public nsISupports {
 public: 

  NS_DEFINE_STATIC_IID_ACCESSOR(NS_IOBSERVERSERVICE_IID)

  /**
     * AddObserver
     *
     * Registers a given listener for a notifications regarding the specified
     * topic.
     *
     * @param anObserve : The interface pointer which will receive notifications.
     * @param aTopic    : The notification topic or subject.
     * @param ownsWeak  : If set to false, the nsIObserverService will hold a 
     *                    strong reference to |anObserver|.  If set to true and 
     *                    |anObserver| supports the nsIWeakReference interface,
     *                    a weak reference will be held.  Otherwise an error will be
     *                    returned.
     */
  /* void addObserver (in nsIObserver anObserver, in string aTopic, in boolean ownsWeak); */
  NS_IMETHOD AddObserver(nsIObserver *anObserver, const char *aTopic, PRBool ownsWeak) = 0;

  /**
     * removeObserver
     *
     * Unregisters a given listener from notifications regarding the specified
     * topic.
     *
     * @param anObserver : The interface pointer which will stop recieving
     *                     notifications.
     * @param aTopic     : The notification topic or subject.
     */
  /* void removeObserver (in nsIObserver anObserver, in string aTopic); */
  NS_IMETHOD RemoveObserver(nsIObserver *anObserver, const char *aTopic) = 0;

  /**
     * notifyObservers
     *
     * Notifies all registered listeners of the given topic.
     *
     * @param aSubject : Notification specific interface pointer.
     * @param aTopic   : The notification topic or subject.
     * @param someData : Notification specific wide string.
     */
  /* void notifyObservers (in nsISupports aSubject, in string aTopic, in wstring someData); */
  NS_IMETHOD NotifyObservers(nsISupports *aSubject, const char *aTopic, const PRUnichar *someData) = 0;

  /**
     * enumerateObservers
     *
     * Returns an enumeration of all registered listeners.
     *
     * @param aTopic   : The notification topic or subject.
     */
  /* nsISimpleEnumerator enumerateObservers (in string aTopic); */
  NS_IMETHOD EnumerateObservers(const char *aTopic, nsISimpleEnumerator **_retval) = 0;

};

/* Use this macro when declaring classes that implement this interface. */
#define NS_DECL_NSIOBSERVERSERVICE \
  NS_IMETHOD AddObserver(nsIObserver *anObserver, const char *aTopic, PRBool ownsWeak); \
  NS_IMETHOD RemoveObserver(nsIObserver *anObserver, const char *aTopic); \
  NS_IMETHOD NotifyObservers(nsISupports *aSubject, const char *aTopic, const PRUnichar *someData); \
  NS_IMETHOD EnumerateObservers(const char *aTopic, nsISimpleEnumerator **_retval); 

/* Use this macro to declare functions that forward the behavior of this interface to another object. */
#define NS_FORWARD_NSIOBSERVERSERVICE(_to) \
  NS_IMETHOD AddObserver(nsIObserver *anObserver, const char *aTopic, PRBool ownsWeak) { return _to AddObserver(anObserver, aTopic, ownsWeak); } \
  NS_IMETHOD RemoveObserver(nsIObserver *anObserver, const char *aTopic) { return _to RemoveObserver(anObserver, aTopic); } \
  NS_IMETHOD NotifyObservers(nsISupports *aSubject, const char *aTopic, const PRUnichar *someData) { return _to NotifyObservers(aSubject, aTopic, someData); } \
  NS_IMETHOD EnumerateObservers(const char *aTopic, nsISimpleEnumerator **_retval) { return _to EnumerateObservers(aTopic, _retval); } 

/* Use this macro to declare functions that forward the behavior of this interface to another object in a safe way. */
#define NS_FORWARD_SAFE_NSIOBSERVERSERVICE(_to) \
  NS_IMETHOD AddObserver(nsIObserver *anObserver, const char *aTopic, PRBool ownsWeak) { return !_to ? NS_ERROR_NULL_POINTER : _to->AddObserver(anObserver, aTopic, ownsWeak); } \
  NS_IMETHOD RemoveObserver(nsIObserver *anObserver, const char *aTopic) { return !_to ? NS_ERROR_NULL_POINTER : _to->RemoveObserver(anObserver, aTopic); } \
  NS_IMETHOD NotifyObservers(nsISupports *aSubject, const char *aTopic, const PRUnichar *someData) { return !_to ? NS_ERROR_NULL_POINTER : _to->NotifyObservers(aSubject, aTopic, someData); } \
  NS_IMETHOD EnumerateObservers(const char *aTopic, nsISimpleEnumerator **_retval) { return !_to ? NS_ERROR_NULL_POINTER : _to->EnumerateObservers(aTopic, _retval); } 

#if 0
/* Use the code below as a template for the implementation class for this interface. */

/* Header file */
class nsObserverService : public nsIObserverService
{
public:
  NS_DECL_ISUPPORTS
  NS_DECL_NSIOBSERVERSERVICE

  nsObserverService();
  virtual ~nsObserverService();
  /* additional members */
};

/* Implementation file */
NS_IMPL_ISUPPORTS1(nsObserverService, nsIObserverService)

nsObserverService::nsObserverService()
{
  /* member initializers and constructor code */
}

nsObserverService::~nsObserverService()
{
  /* destructor code */
}

/* void addObserver (in nsIObserver anObserver, in string aTopic, in boolean ownsWeak); */
NS_IMETHODIMP nsObserverService::AddObserver(nsIObserver *anObserver, const char *aTopic, PRBool ownsWeak)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

/* void removeObserver (in nsIObserver anObserver, in string aTopic); */
NS_IMETHODIMP nsObserverService::RemoveObserver(nsIObserver *anObserver, const char *aTopic)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

/* void notifyObservers (in nsISupports aSubject, in string aTopic, in wstring someData); */
NS_IMETHODIMP nsObserverService::NotifyObservers(nsISupports *aSubject, const char *aTopic, const PRUnichar *someData)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

/* nsISimpleEnumerator enumerateObservers (in string aTopic); */
NS_IMETHODIMP nsObserverService::EnumerateObservers(const char *aTopic, nsISimpleEnumerator **_retval)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

/* End of implementation class template. */
#endif


#endif /* __gen_nsIObserverService_h__ */