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adding a tree interface to datasources. Not yet in build system
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rdf/base/public/nsIRDFTree.h
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60
rdf/base/public/nsIRDFTree.h
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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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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef nsIRDFTree_h__
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#define nsIRDFTree_h__
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#include "nscore.h"
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#include "nsISupports.h"
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#include "prtypes.h"
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#include "rdf.h" // for error codes
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/*
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An interface for presenting a tree view of an rdf datasource (or
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database).
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Any datasource can also support nsIRDFTree. The interface is purely
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syntactic sugar for traversing simple tree where the child relation
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corresponds to the property type nc:child (nc = http://home.netscape.com/NC-rdf#).
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Each leaf is assumed to have a certain predefined set of properties
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such as creationDate, size, lastModificationDate, lastVisitDate, etc.
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This interface is substantially less general than nsIRDFDataSource,
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but is adequate for bookmarks, the file system, history and a few
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other very commonly used data sources.
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*/
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// {7D7EEBD1-AA41-11d2-80B7-006097B76B8E}
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#define NS_IRDFTREE_IID \
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{ 0x7d7eebd1, 0xaa41, 0x11d2, { 0x80, 0xb7, 0x0, 0x60, 0x97, 0xb7, 0x6b, 0x8e } };
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class nsIRDFTree : public nsISupports {
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public:
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NS_IMETHOD ListChildren (nsIRDFResource* folder, nsVoidArray** result);
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// XXX should define something called nsResourceArray and use that
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NS_IMETHOD IsFolder (nsIRDFResource* node, PRBool* result);
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NS_IMETHOD GetProperty (nsIRDFResource* node, nsIRDFResource* property,
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nsIRDFNode** result);
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}
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#endif
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