1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is Mozilla Communicator client code.
16 : *
17 : * The Initial Developer of the Original Code is
18 : * Netscape Communications Corporation.
19 : * Portions created by the Initial Developer are Copyright (C) 1998
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : * Chris Waterson <waterson@netscape.com>
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
29 : * of those above. If you wish to allow use of your version of this file only
30 : * under the terms of either the GPL or the LGPL, and not to allow others to
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32 : * decision by deleting the provisions above and replace them with the notice
33 : * and other provisions required by the GPL or the LGPL. If you do not delete
34 : * the provisions above, a recipient may use your version of this file under
35 : * the terms of any one of the MPL, the GPL or the LGPL.
36 : *
37 : * ***** END LICENSE BLOCK ***** */
38 :
39 : #ifndef nsTemplateMap_h__
40 : #define nsTemplateMap_h__
41 :
42 : #include "pldhash.h"
43 : #include "nsXULElement.h"
44 :
45 : class nsTemplateMap {
46 : protected:
47 : struct Entry {
48 : PLDHashEntryHdr mHdr;
49 : nsIContent* mContent;
50 : nsIContent* mTemplate;
51 : };
52 :
53 : PLDHashTable mTable;
54 :
55 : void
56 0 : Init() { PL_DHashTableInit(&mTable, PL_DHashGetStubOps(), nsnull, sizeof(Entry), PL_DHASH_MIN_SIZE); }
57 :
58 : void
59 0 : Finish() { PL_DHashTableFinish(&mTable); }
60 :
61 : public:
62 0 : nsTemplateMap() { Init(); }
63 :
64 0 : ~nsTemplateMap() { Finish(); }
65 :
66 : void
67 0 : Put(nsIContent* aContent, nsIContent* aTemplate) {
68 0 : NS_ASSERTION(PL_DHASH_ENTRY_IS_FREE(PL_DHashTableOperate(&mTable, aContent, PL_DHASH_LOOKUP)),
69 : "aContent already in map");
70 :
71 : Entry* entry =
72 0 : reinterpret_cast<Entry*>(PL_DHashTableOperate(&mTable, aContent, PL_DHASH_ADD));
73 :
74 0 : if (entry) {
75 0 : entry->mContent = aContent;
76 0 : entry->mTemplate = aTemplate;
77 : }
78 0 : }
79 :
80 : void
81 0 : Remove(nsIContent* aContent) {
82 0 : PL_DHashTableOperate(&mTable, aContent, PL_DHASH_REMOVE);
83 :
84 0 : for (nsIContent* child = aContent->GetFirstChild();
85 : child;
86 0 : child = child->GetNextSibling()) {
87 0 : Remove(child);
88 : }
89 0 : }
90 :
91 :
92 : void
93 0 : GetTemplateFor(nsIContent* aContent, nsIContent** aResult) {
94 : Entry* entry =
95 0 : reinterpret_cast<Entry*>(PL_DHashTableOperate(&mTable, aContent, PL_DHASH_LOOKUP));
96 :
97 0 : if (PL_DHASH_ENTRY_IS_BUSY(&entry->mHdr))
98 0 : NS_IF_ADDREF(*aResult = entry->mTemplate);
99 : else
100 0 : *aResult = nsnull;
101 0 : }
102 :
103 : void
104 0 : Clear() { Finish(); Init(); }
105 : };
106 :
107 : #endif // nsTemplateMap_h__
108 :
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