1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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.org 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 : *
24 : * Alternatively, the contents of this file may be used under the terms of
25 : * either of the GNU General Public License Version 2 or later (the "GPL"),
26 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
27 : * in which case the provisions of the GPL or the LGPL are applicable instead
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33 : * the provisions above, a recipient may use your version of this file under
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35 : *
36 : * ***** END LICENSE BLOCK ***** */
37 :
38 : /*
39 : * a list of the recomputation that needs to be done in response to a
40 : * style change
41 : */
42 :
43 : #ifndef nsStyleChangeList_h___
44 : #define nsStyleChangeList_h___
45 :
46 : #include "mozilla/Attributes.h"
47 :
48 : #include "nsError.h"
49 : #include "nsChangeHint.h"
50 :
51 : class nsIFrame;
52 : class nsIContent;
53 :
54 : // XXX would all platforms support putting this inside the list?
55 : struct nsStyleChangeData {
56 : nsIFrame* mFrame;
57 : nsIContent* mContent;
58 : nsChangeHint mHint;
59 : };
60 :
61 : static const PRUint32 kStyleChangeBufferSize = 10;
62 :
63 : // Note: nsStyleChangeList owns a reference to
64 : // nsIContent pointers in its list.
65 : class nsStyleChangeList {
66 : public:
67 : nsStyleChangeList();
68 : ~nsStyleChangeList();
69 :
70 0 : PRInt32 Count(void) const {
71 0 : return mCount;
72 : }
73 :
74 : /**
75 : * Fills in pointers without reference counting.
76 : */
77 : nsresult ChangeAt(PRInt32 aIndex, nsIFrame*& aFrame, nsIContent*& aContent,
78 : nsChangeHint& aHint) const;
79 :
80 : /**
81 : * Fills in a pointer to the list entry storage (no reference counting
82 : * involved).
83 : */
84 : nsresult ChangeAt(PRInt32 aIndex, const nsStyleChangeData** aChangeData) const;
85 :
86 : nsresult AppendChange(nsIFrame* aFrame, nsIContent* aContent, nsChangeHint aHint);
87 :
88 : void Clear(void);
89 :
90 : protected:
91 : nsStyleChangeList& operator=(const nsStyleChangeList& aCopy);
92 : bool operator==(const nsStyleChangeList& aOther) const;
93 :
94 : nsStyleChangeData* mArray;
95 : PRInt32 mArraySize;
96 : PRInt32 mCount;
97 : nsStyleChangeData mBuffer[kStyleChangeBufferSize];
98 :
99 : private:
100 : nsStyleChangeList(const nsStyleChangeList&) MOZ_DELETE;
101 : };
102 :
103 :
104 : #endif /* nsStyleChangeList_h___ */
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