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 the Mozilla SVG project.
16 : *
17 : * The Initial Developer of the Original Code is
18 : * IBM Corporation
19 : * Portions created by the Initial Developer are Copyright (C) 2006
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
28 : * of those above. If you wish to allow use of your version of this file only
29 : * under the terms of either the GPL or the LGPL, and not to allow others to
30 : * use your version of this file under the terms of the MPL, indicate your
31 : * decision by deleting the provisions above and replace them with the notice
32 : * and other provisions required by the GPL or the LGPL. If you do not delete
33 : * the provisions above, a recipient may use your version of this file under
34 : * the terms of any one of the MPL, the GPL or the LGPL.
35 : *
36 : * ***** END LICENSE BLOCK ***** */
37 :
38 : #ifndef __NS_SVGDATAPARSER_H__
39 : #define __NS_SVGDATAPARSER_H__
40 :
41 : #include "nsError.h"
42 :
43 : class nsAString;
44 :
45 : //----------------------------------------------------------------------
46 : // helper macros
47 : #define ENSURE_MATCHED(exp) { nsresult rv = exp; if (NS_FAILED(rv)) return rv; }
48 :
49 : ////////////////////////////////////////////////////////////////////////
50 : // nsSVGDataParser: a simple abstract class for parsing values
51 : // for path and transform values.
52 : //
53 : class nsSVGDataParser
54 0 : {
55 : public:
56 : nsresult Parse(const nsAString &aValue);
57 :
58 : protected:
59 : const char* mInputPos;
60 :
61 : const char* mTokenPos;
62 : enum { DIGIT, WSP, COMMA, POINT, SIGN, LEFT_PAREN, RIGHT_PAREN, OTHER, END } mTokenType;
63 : char mTokenVal;
64 :
65 : // helpers
66 : void GetNextToken();
67 : void RewindTo(const char* aPos);
68 : virtual nsresult Match()=0;
69 :
70 : nsresult MatchNonNegativeNumber(float* aX);
71 : bool IsTokenNonNegativeNumberStarter();
72 :
73 : nsresult MatchNumber(float* x);
74 : bool IsTokenNumberStarter();
75 :
76 : nsresult MatchCommaWsp();
77 : bool IsTokenCommaWspStarter();
78 :
79 : nsresult MatchIntegerConst();
80 :
81 : nsresult MatchFloatingPointConst();
82 :
83 : nsresult MatchFractConst();
84 :
85 : nsresult MatchExponent();
86 : bool IsTokenExponentStarter();
87 :
88 : nsresult MatchDigitSeq();
89 : bool IsTokenDigitSeqStarter();
90 :
91 : nsresult MatchWsp();
92 : bool IsTokenWspStarter();
93 :
94 : nsresult MatchLeftParen();
95 : nsresult MatchRightParen();
96 : };
97 :
98 :
99 : #endif // __NS_SVGDATAPARSER_H__
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