1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 : *
3 : * ***** BEGIN LICENSE BLOCK *****
4 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
5 : *
6 : * The contents of this file are subject to the Mozilla Public License Version
7 : * 1.1 (the "License"); you may not use this file except in compliance with
8 : * the License. You may obtain a copy of the License at
9 : * http://www.mozilla.org/MPL/
10 : *
11 : * Software distributed under the License is distributed on an "AS IS" basis,
12 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13 : * for the specific language governing rights and limitations under the
14 : * License.
15 : *
16 : * The Original Code is this file as it was released on May 1 2001.
17 : *
18 : * The Initial Developer of the Original Code is
19 : * Jonas Sicking.
20 : * Portions created by the Initial Developer are Copyright (C) 2001
21 : * the Initial Developer. All Rights Reserved.
22 : *
23 : * Contributor(s):
24 : * Jonas Sicking <sicking@bigfoot.com> (Original Author)
25 : *
26 : * Alternatively, the contents of this file may be used under the terms of
27 : * either of the GNU General Public License Version 2 or later (the "GPL"),
28 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
29 : * in which case the provisions of the GPL or the LGPL are applicable instead
30 : * of those above. If you wish to allow use of your version of this file only
31 : * under the terms of either the GPL or the LGPL, and not to allow others to
32 : * use your version of this file under the terms of the MPL, indicate your
33 : * decision by deleting the provisions above and replace them with the notice
34 : * and other provisions required by the GPL or the LGPL. If you do not delete
35 : * the provisions above, a recipient may use your version of this file under
36 : * the terms of any one of the MPL, the GPL or the LGPL.
37 : *
38 : * ***** END LICENSE BLOCK ***** */
39 :
40 : #include "nsTraversal.h"
41 :
42 : #include "nsIDOMNode.h"
43 : #include "nsIDOMNodeFilter.h"
44 : #include "nsDOMError.h"
45 :
46 : #include "nsIContent.h"
47 :
48 : #include "nsGkAtoms.h"
49 :
50 65 : nsTraversal::nsTraversal(nsINode *aRoot,
51 : PRUint32 aWhatToShow,
52 : nsIDOMNodeFilter *aFilter) :
53 : mRoot(aRoot),
54 : mWhatToShow(aWhatToShow),
55 : mFilter(aFilter),
56 65 : mInAcceptNode(false)
57 : {
58 65 : NS_ASSERTION(aRoot, "invalid root in call to nsTraversal constructor");
59 65 : }
60 :
61 65 : nsTraversal::~nsTraversal()
62 : {
63 : /* destructor code */
64 130 : }
65 :
66 : /*
67 : * Tests if and how a node should be filtered. Uses mWhatToShow and
68 : * mFilter to test the node.
69 : * @param aNode Node to test
70 : * @param _filtered Returned filtervalue. See nsIDOMNodeFilter.idl
71 : * @returns Errorcode
72 : */
73 2822 : nsresult nsTraversal::TestNode(nsINode* aNode, PRInt16* _filtered)
74 : {
75 2822 : NS_ENSURE_TRUE(!mInAcceptNode, NS_ERROR_DOM_INVALID_STATE_ERR);
76 :
77 : nsresult rv;
78 :
79 2822 : *_filtered = nsIDOMNodeFilter::FILTER_SKIP;
80 :
81 2822 : PRUint16 nodeType = aNode->NodeType();
82 :
83 2822 : if (nodeType <= 12 && !((1 << (nodeType-1)) & mWhatToShow)) {
84 1604 : return NS_OK;
85 : }
86 :
87 1218 : if (mFilter) {
88 1606 : nsCOMPtr<nsIDOMNode> domNode = do_QueryInterface(aNode);
89 803 : mInAcceptNode = true;
90 803 : rv = mFilter->AcceptNode(domNode, _filtered);
91 803 : mInAcceptNode = false;
92 803 : return rv;
93 : }
94 :
95 415 : *_filtered = nsIDOMNodeFilter::FILTER_ACCEPT;
96 415 : return NS_OK;
97 : }
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