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27 | ****************************************************************************/ |
28 | |
29 | #include "messagehighlighter.h" |
30 | |
31 | #include <QtCore/QTextStream> |
32 | #include <QtWidgets/QTextEdit> |
33 | |
34 | QT_BEGIN_NAMESPACE |
35 | |
36 | MessageHighlighter::MessageHighlighter(QTextEdit *textEdit) |
37 | : QSyntaxHighlighter(textEdit->document()) |
38 | { |
39 | QTextCharFormat entityFormat; |
40 | entityFormat.setForeground(Qt::red); |
41 | m_formats[Entity] = entityFormat; |
42 | |
43 | QTextCharFormat tagFormat; |
44 | tagFormat.setForeground(Qt::darkMagenta); |
45 | m_formats[Tag] = tagFormat; |
46 | |
47 | QTextCharFormat ; |
48 | commentFormat.setForeground(Qt::gray); |
49 | commentFormat.setFontItalic(true); |
50 | m_formats[Comment] = commentFormat; |
51 | |
52 | QTextCharFormat attributeFormat; |
53 | attributeFormat.setForeground(Qt::black); |
54 | attributeFormat.setFontItalic(true); |
55 | m_formats[Attribute] = attributeFormat; |
56 | |
57 | QTextCharFormat valueFormat; |
58 | valueFormat.setForeground(Qt::blue); |
59 | m_formats[Value] = valueFormat; |
60 | |
61 | QTextCharFormat acceleratorFormat; |
62 | acceleratorFormat.setFontUnderline(true); |
63 | m_formats[Accelerator] = acceleratorFormat; |
64 | |
65 | QTextCharFormat variableFormat; |
66 | variableFormat.setForeground(Qt::blue); |
67 | m_formats[Variable] = variableFormat; |
68 | |
69 | rehighlight(); |
70 | } |
71 | |
72 | void MessageHighlighter::highlightBlock(const QString &text) |
73 | { |
74 | static const QLatin1Char tab = QLatin1Char('\t'); |
75 | static const QLatin1Char space = QLatin1Char(' '); |
76 | static const QLatin1Char amp = QLatin1Char('&'); |
77 | static const QLatin1Char endTag = QLatin1Char('>'); |
78 | static const QLatin1Char quot = QLatin1Char('"'); |
79 | static const QLatin1Char apos = QLatin1Char('\''); |
80 | static const QLatin1Char semicolon = QLatin1Char(';'); |
81 | static const QLatin1Char equals = QLatin1Char('='); |
82 | static const QLatin1Char percent = QLatin1Char('%'); |
83 | static const QLatin1String = QLatin1String("<!--" ); |
84 | static const QLatin1String = QLatin1String("-->" ); |
85 | static const QLatin1String endElement = QLatin1String("/>" ); |
86 | |
87 | int state = previousBlockState(); |
88 | int len = text.length(); |
89 | int start = 0; |
90 | int pos = 0; |
91 | |
92 | while (pos < len) { |
93 | switch (state) { |
94 | case NormalState: |
95 | default: |
96 | while (pos < len) { |
97 | QChar ch = text.at(i: pos); |
98 | if (ch == QLatin1Char('<')) { |
99 | if (text.mid(position: pos, n: 4) == startComment) { |
100 | state = InComment; |
101 | } else { |
102 | state = InTag; |
103 | start = pos; |
104 | while (pos < len && text.at(i: pos) != space |
105 | && text.at(i: pos) != endTag |
106 | && text.at(i: pos) != tab |
107 | && text.mid(position: pos, n: 2) != endElement) |
108 | ++pos; |
109 | if (text.mid(position: pos, n: 2) == endElement) |
110 | ++pos; |
111 | setFormat(start, count: pos - start, |
112 | format: m_formats[Tag]); |
113 | break; |
114 | } |
115 | break; |
116 | } else if (ch == amp && pos + 1 < len) { |
117 | // Default is Accelerator |
118 | if (text.at(i: pos + 1).isLetterOrNumber()) |
119 | setFormat(start: pos + 1, count: 1, format: m_formats[Accelerator]); |
120 | |
121 | // When a semicolon follows assume an Entity |
122 | start = pos; |
123 | ch = text.at(i: ++pos); |
124 | while (pos + 1 < len && ch != semicolon && ch.isLetterOrNumber()) |
125 | ch = text.at(i: ++pos); |
126 | if (ch == semicolon) |
127 | setFormat(start, count: pos - start + 1, format: m_formats[Entity]); |
128 | } else if (ch == percent) { |
129 | start = pos; |
130 | // %[1-9]* |
131 | for (++pos; pos < len && text.at(i: pos).isDigit(); ++pos) {} |
132 | // %n |
133 | if (pos < len && pos == start + 1 && text.at(i: pos) == QLatin1Char('n')) |
134 | ++pos; |
135 | setFormat(start, count: pos - start, format: m_formats[Variable]); |
136 | } else { |
137 | // No tag, comment or entity started, continue... |
138 | ++pos; |
139 | } |
140 | } |
141 | break; |
142 | case InComment: |
143 | start = pos; |
144 | while (pos < len) { |
145 | if (text.mid(position: pos, n: 3) == endComment) { |
146 | pos += 3; |
147 | state = NormalState; |
148 | break; |
149 | } else { |
150 | ++pos; |
151 | } |
152 | } |
153 | setFormat(start, count: pos - start, format: m_formats[Comment]); |
154 | break; |
155 | case InTag: |
156 | QChar quote = QChar::Null; |
157 | while (pos < len) { |
158 | QChar ch = text.at(i: pos); |
159 | if (quote.isNull()) { |
160 | start = pos; |
161 | if (ch == apos || ch == quot) { |
162 | quote = ch; |
163 | } else if (ch == endTag) { |
164 | ++pos; |
165 | setFormat(start, count: pos - start, format: m_formats[Tag]); |
166 | state = NormalState; |
167 | break; |
168 | } else if (text.mid(position: pos, n: 2) == endElement) { |
169 | pos += 2; |
170 | setFormat(start, count: pos - start, format: m_formats[Tag]); |
171 | state = NormalState; |
172 | break; |
173 | } else if (ch != space && text.at(i: pos) != tab) { |
174 | // Tag not ending, not a quote and no whitespace, so |
175 | // we must be dealing with an attribute. |
176 | ++pos; |
177 | while (pos < len && text.at(i: pos) != space |
178 | && text.at(i: pos) != tab |
179 | && text.at(i: pos) != equals) |
180 | ++pos; |
181 | setFormat(start, count: pos - start, format: m_formats[Attribute]); |
182 | start = pos; |
183 | } |
184 | } else if (ch == quote) { |
185 | quote = QChar::Null; |
186 | |
187 | // Anything quoted is a value |
188 | setFormat(start, count: pos - start, format: m_formats[Value]); |
189 | } |
190 | ++pos; |
191 | } |
192 | break; |
193 | } |
194 | } |
195 | setCurrentBlockState(state); |
196 | } |
197 | |
198 | QT_END_NAMESPACE |
199 | |