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127 lines
5.1 KiB
Plaintext
127 lines
5.1 KiB
Plaintext
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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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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interface nsIRDFDataSource;
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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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/**
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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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in nsIRDFResource aProperty,
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in nsIRDFNode aTarget);
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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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in nsIRDFResource aProperty,
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in nsIRDFNode aTarget);
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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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in nsIRDFResource aProperty,
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in nsIRDFNode aOldTarget,
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in nsIRDFNode aNewTarget);
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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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in nsIRDFResource aNewSource,
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in nsIRDFResource aProperty,
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in nsIRDFNode aTarget);
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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 onBeginUpdateBatch(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 onEndUpdateBatch(in nsIRDFDataSource aDataSource);
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};
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