|
1 /**************************************************************************** |
|
2 ** |
|
3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
|
4 ** All rights reserved. |
|
5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
|
6 ** |
|
7 ** This file is part of the Qt Designer of the Qt Toolkit. |
|
8 ** |
|
9 ** $QT_BEGIN_LICENSE:LGPL$ |
|
10 ** No Commercial Usage |
|
11 ** This file contains pre-release code and may not be distributed. |
|
12 ** You may use this file in accordance with the terms and conditions |
|
13 ** contained in the Technology Preview License Agreement accompanying |
|
14 ** this package. |
|
15 ** |
|
16 ** GNU Lesser General Public License Usage |
|
17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
|
18 ** General Public License version 2.1 as published by the Free Software |
|
19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
|
20 ** packaging of this file. Please review the following information to |
|
21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
|
22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
|
23 ** |
|
24 ** In addition, as a special exception, Nokia gives you certain additional |
|
25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
|
26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
|
27 ** |
|
28 ** If you have questions regarding the use of this file, please contact |
|
29 ** Nokia at qt-info@nokia.com. |
|
30 ** |
|
31 ** |
|
32 ** |
|
33 ** |
|
34 ** |
|
35 ** |
|
36 ** |
|
37 ** |
|
38 ** $QT_END_LICENSE$ |
|
39 ** |
|
40 ****************************************************************************/ |
|
41 |
|
42 #include "csshighlighter_p.h" |
|
43 |
|
44 QT_BEGIN_NAMESPACE |
|
45 |
|
46 namespace qdesigner_internal { |
|
47 |
|
48 CssHighlighter::CssHighlighter(QTextDocument *document) |
|
49 : QSyntaxHighlighter(document) |
|
50 { |
|
51 } |
|
52 |
|
53 void CssHighlighter::highlightBlock(const QString& text) |
|
54 { |
|
55 enum Token { ALNUM, LBRACE, RBRACE, COLON, SEMICOLON, COMMA, QUOTE, SLASH, STAR }; |
|
56 static const int transitions[10][9] = { |
|
57 { Selector, Property, Selector, Pseudo, Property, Selector, Quote, MaybeComment, Selector }, // Selector |
|
58 { Property, Property, Selector, Value, Property, Property, Quote, MaybeComment, Property }, // Property |
|
59 { Value, Property, Selector, Value, Property, Value, Quote, MaybeComment, Value }, // Value |
|
60 { Pseudo1, Property, Selector, Pseudo2, Selector, Selector, Quote, MaybeComment, Pseudo }, // Pseudo |
|
61 { Pseudo1, Property, Selector, Pseudo, Selector, Selector, Quote, MaybeComment, Pseudo1 }, // Pseudo1 |
|
62 { Pseudo2, Property, Selector, Pseudo, Selector, Selector, Quote, MaybeComment, Pseudo2 }, // Pseudo2 |
|
63 { Quote, Quote, Quote, Quote, Quote, Quote, -1, Quote, Quote }, // Quote |
|
64 { -1, -1, -1, -1, -1, -1, -1, -1, Comment }, // MaybeComment |
|
65 { Comment, Comment, Comment, Comment, Comment, Comment, Comment, Comment, MaybeCommentEnd }, // Comment |
|
66 { Comment, Comment, Comment, Comment, Comment, Comment, Comment, -1, MaybeCommentEnd } // MaybeCommentEnd |
|
67 }; |
|
68 |
|
69 int lastIndex = 0; |
|
70 bool lastWasSlash = false; |
|
71 int state = previousBlockState(), save_state; |
|
72 if (state == -1) { |
|
73 // As long as the text is empty, leave the state undetermined |
|
74 if (text.isEmpty()) { |
|
75 setCurrentBlockState(-1); |
|
76 return; |
|
77 } |
|
78 // The initial state is based on the precense of a : and the absense of a {. |
|
79 // This is because Qt style sheets support both a full stylesheet as well as |
|
80 // an inline form with just properties. |
|
81 state = save_state = (text.indexOf(QLatin1Char(':')) > -1 && |
|
82 text.indexOf(QLatin1Char('{')) == -1) ? Property : Selector; |
|
83 } else { |
|
84 save_state = state>>16; |
|
85 state &= 0x00ff; |
|
86 } |
|
87 |
|
88 if (state == MaybeCommentEnd) { |
|
89 state = Comment; |
|
90 } else if (state == MaybeComment) { |
|
91 state = save_state; |
|
92 } |
|
93 |
|
94 for (int i = 0; i < text.length(); i++) { |
|
95 int token = ALNUM; |
|
96 const QChar c = text.at(i); |
|
97 const char a = c.toAscii(); |
|
98 |
|
99 if (state == Quote) { |
|
100 if (a == '\\') { |
|
101 lastWasSlash = true; |
|
102 } else { |
|
103 if (a == '\"' && !lastWasSlash) { |
|
104 token = QUOTE; |
|
105 } |
|
106 lastWasSlash = false; |
|
107 } |
|
108 } else { |
|
109 switch (a) { |
|
110 case '{': token = LBRACE; break; |
|
111 case '}': token = RBRACE; break; |
|
112 case ':': token = COLON; break; |
|
113 case ';': token = SEMICOLON; break; |
|
114 case ',': token = COMMA; break; |
|
115 case '\"': token = QUOTE; break; |
|
116 case '/': token = SLASH; break; |
|
117 case '*': token = STAR; break; |
|
118 default: break; |
|
119 } |
|
120 } |
|
121 |
|
122 int new_state = transitions[state][token]; |
|
123 |
|
124 if (new_state != state) { |
|
125 bool include_token = new_state == MaybeCommentEnd || (state == MaybeCommentEnd && new_state!= Comment) |
|
126 || state == Quote; |
|
127 highlight(text, lastIndex, i-lastIndex+include_token, state); |
|
128 |
|
129 if (new_state == Comment) { |
|
130 lastIndex = i-1; // include the slash and star |
|
131 } else { |
|
132 lastIndex = i + ((token == ALNUM || new_state == Quote) ? 0 : 1); |
|
133 } |
|
134 } |
|
135 |
|
136 if (new_state == -1) { |
|
137 state = save_state; |
|
138 } else if (state <= Pseudo2) { |
|
139 save_state = state; |
|
140 state = new_state; |
|
141 } else { |
|
142 state = new_state; |
|
143 } |
|
144 } |
|
145 |
|
146 highlight(text, lastIndex, text.length() - lastIndex, state); |
|
147 setCurrentBlockState(state + (save_state<<16)); |
|
148 } |
|
149 |
|
150 void CssHighlighter::highlight(const QString &text, int start, int length, int state) |
|
151 { |
|
152 if (start >= text.length() || length <= 0) |
|
153 return; |
|
154 |
|
155 QTextCharFormat format; |
|
156 |
|
157 switch (state) { |
|
158 case Selector: |
|
159 setFormat(start, length, Qt::darkRed); |
|
160 break; |
|
161 case Property: |
|
162 setFormat(start, length, Qt::blue); |
|
163 break; |
|
164 case Value: |
|
165 setFormat(start, length, Qt::black); |
|
166 break; |
|
167 case Pseudo1: |
|
168 setFormat(start, length, Qt::darkRed); |
|
169 break; |
|
170 case Pseudo2: |
|
171 setFormat(start, length, Qt::darkRed); |
|
172 break; |
|
173 case Quote: |
|
174 setFormat(start, length, Qt::darkMagenta); |
|
175 break; |
|
176 case Comment: |
|
177 case MaybeCommentEnd: |
|
178 format.setForeground(Qt::darkGreen); |
|
179 setFormat(start, length, format); |
|
180 break; |
|
181 default: |
|
182 break; |
|
183 } |
|
184 } |
|
185 |
|
186 } // namespace qdesigner_internal |
|
187 |
|
188 QT_END_NAMESPACE |