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 MathML Project.
16 : *
17 : * The Initial Developer of the Original Code is
18 : * The University Of Queensland.
19 : * Portions created by the Initial Developer are Copyright (C) 1999
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : * Roger B. Sidje <rbs@maths.uq.edu.au>
24 : * David J. Fiddes <D.J.Fiddes@hw.ac.uk>
25 : * Frederic Wang <fred.wang@free.fr>
26 : *
27 : * Alternatively, the contents of this file may be used under the terms of
28 : * either of the GNU General Public License Version 2 or later (the "GPL"),
29 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
30 : * in which case the provisions of the GPL or the LGPL are applicable instead
31 : * of those above. If you wish to allow use of your version of this file only
32 : * under the terms of either the GPL or the LGPL, and not to allow others to
33 : * use your version of this file under the terms of the MPL, indicate your
34 : * decision by deleting the provisions above and replace them with the notice
35 : * and other provisions required by the GPL or the LGPL. If you do not delete
36 : * the provisions above, a recipient may use your version of this file under
37 : * the terms of any one of the MPL, the GPL or the LGPL.
38 : *
39 : * ***** END LICENSE BLOCK ***** */
40 :
41 : #ifndef nsMathMLmfencedFrame_h
42 : #define nsMathMLmfencedFrame_h
43 :
44 : #include "nsCOMPtr.h"
45 : #include "nsMathMLContainerFrame.h"
46 :
47 : //
48 : // <mfenced> -- surround content with a pair of fences
49 : //
50 :
51 : class nsMathMLmfencedFrame : public nsMathMLContainerFrame {
52 : public:
53 : NS_DECL_FRAMEARENA_HELPERS
54 :
55 : friend nsIFrame* NS_NewMathMLmfencedFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
56 :
57 : virtual void
58 : SetAdditionalStyleContext(PRInt32 aIndex,
59 : nsStyleContext* aStyleContext);
60 : virtual nsStyleContext*
61 : GetAdditionalStyleContext(PRInt32 aIndex) const;
62 :
63 : NS_IMETHOD
64 : InheritAutomaticData(nsIFrame* aParent);
65 :
66 : NS_IMETHOD
67 : SetInitialChildList(ChildListID aListID,
68 : nsFrameList& aChildList);
69 :
70 : NS_IMETHOD
71 : Reflow(nsPresContext* aPresContext,
72 : nsHTMLReflowMetrics& aDesiredSize,
73 : const nsHTMLReflowState& aReflowState,
74 : nsReflowStatus& aStatus);
75 :
76 : NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
77 : const nsRect& aDirtyRect,
78 : const nsDisplayListSet& aLists);
79 :
80 : virtual nscoord
81 : GetIntrinsicWidth(nsRenderingContext* aRenderingContext);
82 :
83 : NS_IMETHOD
84 : AttributeChanged(PRInt32 aNameSpaceID,
85 : nsIAtom* aAttribute,
86 : PRInt32 aModType);
87 :
88 : // override the base method because we must keep separators in sync
89 : virtual nsresult
90 : ChildListChanged(PRInt32 aModType);
91 :
92 : // override the base method so that we can deal with fences and separators
93 : virtual nscoord
94 : FixInterFrameSpacing(nsHTMLReflowMetrics& aDesiredSize);
95 :
96 : // helper routines to format the MathMLChars involved here
97 : static nsresult
98 : ReflowChar(nsPresContext* aPresContext,
99 : nsRenderingContext& aRenderingContext,
100 : nsMathMLChar* aMathMLChar,
101 : nsOperatorFlags aForm,
102 : PRInt32 aScriptLevel,
103 : nscoord axisHeight,
104 : nscoord leading,
105 : nscoord em,
106 : nsBoundingMetrics& aContainerSize,
107 : nscoord& aAscent,
108 : nscoord& aDescent,
109 : bool aRTL);
110 :
111 : static void
112 : PlaceChar(nsMathMLChar* aMathMLChar,
113 : nscoord aDesiredSize,
114 : nsBoundingMetrics& bm,
115 : nscoord& dx);
116 :
117 : protected:
118 0 : nsMathMLmfencedFrame(nsStyleContext* aContext) : nsMathMLContainerFrame(aContext) {}
119 : virtual ~nsMathMLmfencedFrame();
120 :
121 0 : virtual PRIntn GetSkipSides() const { return 0; }
122 :
123 : nsMathMLChar* mOpenChar;
124 : nsMathMLChar* mCloseChar;
125 : nsMathMLChar* mSeparatorsChar;
126 : PRInt32 mSeparatorsCount;
127 :
128 : // clean up
129 : void
130 : RemoveFencesAndSeparators();
131 :
132 : // add fences and separators when all child frames are known
133 : void
134 : CreateFencesAndSeparators(nsPresContext* aPresContext);
135 : };
136 :
137 : #endif /* nsMathMLmfencedFrame_h */
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