95 lines
3.7 KiB
Plaintext
95 lines
3.7 KiB
Plaintext
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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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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