1999-05-04 07:37:07 +04:00
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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1999-11-06 06:43:54 +03:00
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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1999-05-04 07:37:07 +04:00
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*
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1999-11-06 06:43:54 +03:00
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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1999-05-04 07:37:07 +04:00
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*
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1999-11-06 06:43:54 +03:00
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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1999-05-04 07:37:07 +04:00
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* Communications Corporation. Portions created by Netscape are
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1999-11-06 06:43:54 +03:00
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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1999-05-04 07:37:07 +04:00
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*/
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#include "nsISupports.idl"
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#include "nsIRDFResource.idl"
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#include "nsIRDFNode.idl"
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2000-08-08 04:22:36 +04:00
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interface nsIRDFDataSource;
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1999-05-04 07:37:07 +04:00
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// An nsIRDFObserver object is an observer that will be notified
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// when assertions are made or removed from a datasource
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[scriptable, uuid(3CC75360-484A-11D2-BC16-00805F912FE7)]
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interface nsIRDFObserver : nsISupports {
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2000-08-08 04:22:36 +04:00
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/**
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* This method is called whenever a new assertion is made
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* in the data source
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* @param aDataSource the datasource that is issuing
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* the notification.
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* @param aSource the subject of the assertion
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* @param aProperty the predicate of the assertion
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* @param aTarget the object of the assertion
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*/
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void onAssert(in nsIRDFDataSource aDataSource,
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in nsIRDFResource aSource,
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1999-06-24 04:22:58 +04:00
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in nsIRDFResource aProperty,
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1999-05-04 07:37:07 +04:00
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in nsIRDFNode aTarget);
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2000-08-08 04:22:36 +04:00
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/**
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* This method is called whenever an assertion is removed
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* from the data source
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* @param aDataSource the datasource that is issuing
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* the notification.
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* @param aSource the subject of the assertion
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* @param aProperty the predicate of the assertion
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* @param aTarget the object of the assertion
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*/
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void onUnassert(in nsIRDFDataSource aDataSource,
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in nsIRDFResource aSource,
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1999-06-24 04:22:58 +04:00
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in nsIRDFResource aProperty,
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1999-05-04 07:37:07 +04:00
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in nsIRDFNode aTarget);
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1999-06-24 04:22:58 +04:00
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2000-08-08 04:22:36 +04:00
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/**
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* This method is called when the object of an assertion
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* changes from one value to another.
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* @param aDataSource the datasource that is issuing
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* the notification.
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* @param aSource the subject of the assertion
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* @param aProperty the predicate of the assertion
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* @param aOldTarget the old object of the assertion
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* @param aNewTarget the new object of the assertion
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*/
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void onChange(in nsIRDFDataSource aDataSource,
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in nsIRDFResource aSource,
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1999-06-24 04:22:58 +04:00
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in nsIRDFResource aProperty,
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in nsIRDFNode aOldTarget,
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in nsIRDFNode aNewTarget);
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2000-08-08 04:22:36 +04:00
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/**
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* This method is called when the subject of an assertion
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* changes from one value to another.
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* @param aDataSource the datasource that is issuing
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* the notification.
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* @param aOldSource the old subject of the assertion
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* @param aNewSource the new subject of the assertion
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* @param aProperty the predicate of the assertion
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* @param aTarget the object of the assertion
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*/
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void onMove(in nsIRDFDataSource aDataSource,
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in nsIRDFResource aOldSource,
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1999-06-24 04:22:58 +04:00
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in nsIRDFResource aNewSource,
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in nsIRDFResource aProperty,
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in nsIRDFNode aTarget);
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2000-08-08 04:22:36 +04:00
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/**
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* This method is called when a datasource is about to
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* send several notifications at once. The observer can
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* use this as a cue to optimize its behavior. The observer
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* can expect the datasource to call endUpdateBatch() when
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* the group of notifications has completed.
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* @param aDataSource the datasource that is going to
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* be issuing the notifications.
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*/
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void beginUpdateBatch(in nsIRDFDataSource aDataSource);
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/**
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* This method is called when a datasource has completed
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* issuing a notification group.
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* @param aDataSource the datasource that has finished
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* issuing a group of notifications
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*/
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void endUpdateBatch(in nsIRDFDataSource aDataSource);
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1999-05-04 07:37:07 +04:00
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};
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