1 | // Copyright (C) 2016 The Qt Company Ltd. |
2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0 |
3 | |
4 | #include "messagehighlighter.h" |
5 | |
6 | #include <QtCore/QTextStream> |
7 | #include <QtWidgets/QTextEdit> |
8 | |
9 | QT_BEGIN_NAMESPACE |
10 | |
11 | MessageHighlighter::MessageHighlighter(QTextEdit *textEdit) |
12 | : QSyntaxHighlighter(textEdit->document()) |
13 | { |
14 | QTextCharFormat entityFormat; |
15 | entityFormat.setForeground(Qt::red); |
16 | m_formats[Entity] = entityFormat; |
17 | |
18 | QTextCharFormat tagFormat; |
19 | tagFormat.setForeground(Qt::darkMagenta); |
20 | m_formats[Tag] = tagFormat; |
21 | |
22 | QTextCharFormat ; |
23 | commentFormat.setForeground(Qt::gray); |
24 | commentFormat.setFontItalic(true); |
25 | m_formats[Comment] = commentFormat; |
26 | |
27 | QTextCharFormat attributeFormat; |
28 | attributeFormat.setForeground(Qt::black); |
29 | attributeFormat.setFontItalic(true); |
30 | m_formats[Attribute] = attributeFormat; |
31 | |
32 | QTextCharFormat valueFormat; |
33 | valueFormat.setForeground(Qt::blue); |
34 | m_formats[Value] = valueFormat; |
35 | |
36 | QTextCharFormat acceleratorFormat; |
37 | acceleratorFormat.setFontUnderline(true); |
38 | m_formats[Accelerator] = acceleratorFormat; |
39 | |
40 | QTextCharFormat variableFormat; |
41 | variableFormat.setForeground(Qt::blue); |
42 | m_formats[Variable] = variableFormat; |
43 | |
44 | rehighlight(); |
45 | } |
46 | |
47 | void MessageHighlighter::highlightBlock(const QString &text) |
48 | { |
49 | static const QLatin1Char tab = QLatin1Char('\t'); |
50 | static const QLatin1Char space = QLatin1Char(' '); |
51 | static const QLatin1Char amp = QLatin1Char('&'); |
52 | static const QLatin1Char endTag = QLatin1Char('>'); |
53 | static const QLatin1Char quot = QLatin1Char('"'); |
54 | static const QLatin1Char apos = QLatin1Char('\''); |
55 | static const QLatin1Char semicolon = QLatin1Char(';'); |
56 | static const QLatin1Char equals = QLatin1Char('='); |
57 | static const QLatin1Char percent = QLatin1Char('%'); |
58 | static const QLatin1String = QLatin1String("<!--" ); |
59 | static const QLatin1String = QLatin1String("-->" ); |
60 | static const QLatin1String endElement = QLatin1String("/>" ); |
61 | |
62 | int state = previousBlockState(); |
63 | int len = text.size(); |
64 | int start = 0; |
65 | int pos = 0; |
66 | |
67 | while (pos < len) { |
68 | switch (state) { |
69 | case NormalState: |
70 | default: |
71 | while (pos < len) { |
72 | QChar ch = text.at(i: pos); |
73 | if (ch == QLatin1Char('<')) { |
74 | if (text.mid(position: pos, n: 4) == startComment) { |
75 | state = InComment; |
76 | } else { |
77 | state = InTag; |
78 | start = pos; |
79 | while (pos < len && text.at(i: pos) != space |
80 | && text.at(i: pos) != endTag |
81 | && text.at(i: pos) != tab |
82 | && text.mid(position: pos, n: 2) != endElement) |
83 | ++pos; |
84 | if (text.mid(position: pos, n: 2) == endElement) |
85 | ++pos; |
86 | setFormat(start, count: pos - start, |
87 | format: m_formats[Tag]); |
88 | break; |
89 | } |
90 | break; |
91 | } else if (ch == amp && pos + 1 < len) { |
92 | // Default is Accelerator |
93 | if (text.at(i: pos + 1).isLetterOrNumber()) |
94 | setFormat(start: pos + 1, count: 1, format: m_formats[Accelerator]); |
95 | |
96 | // When a semicolon follows assume an Entity |
97 | start = pos; |
98 | ch = text.at(i: ++pos); |
99 | while (pos + 1 < len && ch != semicolon && ch.isLetterOrNumber()) |
100 | ch = text.at(i: ++pos); |
101 | if (ch == semicolon) |
102 | setFormat(start, count: pos - start + 1, format: m_formats[Entity]); |
103 | } else if (ch == percent) { |
104 | start = pos; |
105 | // %[1-9]* |
106 | for (++pos; pos < len && text.at(i: pos).isDigit(); ++pos) {} |
107 | // %n |
108 | if (pos < len && pos == start + 1 && text.at(i: pos) == QLatin1Char('n')) |
109 | ++pos; |
110 | setFormat(start, count: pos - start, format: m_formats[Variable]); |
111 | } else { |
112 | // No tag, comment or entity started, continue... |
113 | ++pos; |
114 | } |
115 | } |
116 | break; |
117 | case InComment: |
118 | start = pos; |
119 | while (pos < len) { |
120 | if (text.mid(position: pos, n: 3) == endComment) { |
121 | pos += 3; |
122 | state = NormalState; |
123 | break; |
124 | } else { |
125 | ++pos; |
126 | } |
127 | } |
128 | setFormat(start, count: pos - start, format: m_formats[Comment]); |
129 | break; |
130 | case InTag: |
131 | QChar quote = QChar::Null; |
132 | while (pos < len) { |
133 | QChar ch = text.at(i: pos); |
134 | if (quote.isNull()) { |
135 | start = pos; |
136 | if (ch == apos || ch == quot) { |
137 | quote = ch; |
138 | } else if (ch == endTag) { |
139 | ++pos; |
140 | setFormat(start, count: pos - start, format: m_formats[Tag]); |
141 | state = NormalState; |
142 | break; |
143 | } else if (text.mid(position: pos, n: 2) == endElement) { |
144 | pos += 2; |
145 | setFormat(start, count: pos - start, format: m_formats[Tag]); |
146 | state = NormalState; |
147 | break; |
148 | } else if (ch != space && text.at(i: pos) != tab) { |
149 | // Tag not ending, not a quote and no whitespace, so |
150 | // we must be dealing with an attribute. |
151 | ++pos; |
152 | while (pos < len && text.at(i: pos) != space |
153 | && text.at(i: pos) != tab |
154 | && text.at(i: pos) != equals) |
155 | ++pos; |
156 | setFormat(start, count: pos - start, format: m_formats[Attribute]); |
157 | start = pos; |
158 | } |
159 | } else if (ch == quote) { |
160 | quote = QChar::Null; |
161 | |
162 | // Anything quoted is a value |
163 | setFormat(start, count: pos - start, format: m_formats[Value]); |
164 | } |
165 | ++pos; |
166 | } |
167 | break; |
168 | } |
169 | } |
170 | setCurrentBlockState(state); |
171 | } |
172 | |
173 | QT_END_NAMESPACE |
174 | |