1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : // vim:cindent:ts=2:et:sw=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 mozilla.org code.
17 : *
18 : * The Initial Developer of the Original Code is
19 : * Netscape Communications Corporation.
20 : * Portions created by the Initial Developer are Copyright (C) 1998
21 : * the Initial Developer. All Rights Reserved.
22 : *
23 : * Contributor(s):
24 : *
25 : * Alternatively, the contents of this file may be used under the terms of
26 : * either of the GNU General Public License Version 2 or later (the "GPL"),
27 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
28 : * in which case the provisions of the GPL or the LGPL are applicable instead
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36 : *
37 : * ***** END LICENSE BLOCK ***** */
38 :
39 : /*
40 : * used by nsCSSFrameConstructor to determine and iterate the child list
41 : * used to construct frames (normal children or something from XBL)
42 : */
43 :
44 : #include "nsChildIterator.h"
45 : #include "nsIDocument.h"
46 : #include "nsBindingManager.h"
47 :
48 : nsresult
49 0 : ChildIterator::Init(nsIContent* aContent,
50 : ChildIterator* aFirst,
51 : ChildIterator* aLast)
52 : {
53 : // Initialize out parameters to be equal, in case of failure.
54 0 : aFirst->mContent = aLast->mContent = nsnull;
55 0 : aFirst->mChild = aLast->mChild = nsnull;
56 :
57 0 : NS_PRECONDITION(aContent != nsnull, "no content");
58 0 : if (! aContent)
59 0 : return NS_ERROR_NULL_POINTER;
60 :
61 0 : nsIDocument* doc = aContent->OwnerDoc();
62 :
63 : // If this node has XBL children, then use them. Otherwise, just use
64 : // the vanilla content APIs.
65 0 : nsINodeList* nodes = doc->BindingManager()->GetXBLChildNodesFor(aContent);
66 :
67 0 : aFirst->mContent = aContent;
68 0 : aLast->mContent = aContent;
69 0 : aFirst->mNodes = nodes;
70 0 : aLast->mNodes = nodes;
71 :
72 0 : if (nodes) {
73 : PRUint32 length;
74 0 : nodes->GetLength(&length);
75 0 : aFirst->mIndex = 0;
76 0 : aLast->mIndex = length;
77 : } else {
78 0 : aFirst->mChild = aContent->GetFirstChild();
79 0 : aLast->mChild = nsnull;
80 : }
81 :
82 0 : return NS_OK;
83 : }
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