1 | /**************************************************************************** |
2 | ** |
3 | ** Copyright (C) 2016 The Qt Company Ltd. |
4 | ** Contact: https://www.qt.io/licensing/ |
5 | ** |
6 | ** This file is part of the Qt Designer of the Qt Toolkit. |
7 | ** |
8 | ** $QT_BEGIN_LICENSE:GPL-EXCEPT$ |
9 | ** Commercial License Usage |
10 | ** Licensees holding valid commercial Qt licenses may use this file in |
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15 | ** information use the contact form at https://www.qt.io/contact-us. |
16 | ** |
17 | ** GNU General Public License Usage |
18 | ** Alternatively, this file may be used under the terms of the GNU |
19 | ** General Public License version 3 as published by the Free Software |
20 | ** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT |
21 | ** included in the packaging of this file. Please review the following |
22 | ** information to ensure the GNU General Public License requirements will |
23 | ** be met: https://www.gnu.org/licenses/gpl-3.0.html. |
24 | ** |
25 | ** $QT_END_LICENSE$ |
26 | ** |
27 | ****************************************************************************/ |
28 | |
29 | #include <QtCore/qtextstream.h> |
30 | #include <QtWidgets/qtextedit.h> |
31 | |
32 | #include "htmlhighlighter_p.h" |
33 | |
34 | QT_BEGIN_NAMESPACE |
35 | |
36 | namespace qdesigner_internal { |
37 | |
38 | HtmlHighlighter::HtmlHighlighter(QTextEdit *textEdit) |
39 | : QSyntaxHighlighter(textEdit->document()) |
40 | { |
41 | QTextCharFormat entityFormat; |
42 | entityFormat.setForeground(Qt::red); |
43 | setFormatFor(construct: Entity, format: entityFormat); |
44 | |
45 | QTextCharFormat tagFormat; |
46 | tagFormat.setForeground(Qt::darkMagenta); |
47 | tagFormat.setFontWeight(QFont::Bold); |
48 | setFormatFor(construct: Tag, format: tagFormat); |
49 | |
50 | QTextCharFormat ; |
51 | commentFormat.setForeground(Qt::gray); |
52 | commentFormat.setFontItalic(true); |
53 | setFormatFor(construct: Comment, format: commentFormat); |
54 | |
55 | QTextCharFormat attributeFormat; |
56 | attributeFormat.setForeground(Qt::black); |
57 | attributeFormat.setFontWeight(QFont::Bold); |
58 | setFormatFor(construct: Attribute, format: attributeFormat); |
59 | |
60 | QTextCharFormat valueFormat; |
61 | valueFormat.setForeground(Qt::blue); |
62 | setFormatFor(construct: Value, format: valueFormat); |
63 | } |
64 | |
65 | void HtmlHighlighter::setFormatFor(Construct construct, |
66 | const QTextCharFormat &format) |
67 | { |
68 | m_formats[construct] = format; |
69 | rehighlight(); |
70 | } |
71 | |
72 | void HtmlHighlighter::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 startTag = QLatin1Char('<'); |
78 | static const QLatin1Char endTag = QLatin1Char('>'); |
79 | static const QLatin1Char quot = QLatin1Char('"'); |
80 | static const QLatin1Char apos = QLatin1Char('\''); |
81 | static const QLatin1Char semicolon = QLatin1Char(';'); |
82 | static const QLatin1Char equals = QLatin1Char('='); |
83 | static const QLatin1String ("<!--" ); |
84 | static const QLatin1String ("-->" ); |
85 | static const QLatin1String endElement("/>" ); |
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 == startTag) { |
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 | } |
117 | if (ch == amp) { |
118 | start = pos; |
119 | while (pos < len && text.at(i: pos++) != semicolon) |
120 | ; |
121 | setFormat(start, count: pos - start, |
122 | format: m_formats[Entity]); |
123 | } else { |
124 | // No tag, comment or entity started, continue... |
125 | ++pos; |
126 | } |
127 | } |
128 | break; |
129 | case InComment: |
130 | start = pos; |
131 | for ( ; pos < len; ++pos) { |
132 | if (text.mid(position: pos, n: 3) == endComment) { |
133 | pos += 3; |
134 | state = NormalState; |
135 | break; |
136 | } |
137 | } |
138 | setFormat(start, count: pos - start, format: m_formats[Comment]); |
139 | break; |
140 | case InTag: |
141 | QChar quote = QChar::Null; |
142 | while (pos < len) { |
143 | QChar ch = text.at(i: pos); |
144 | if (quote.isNull()) { |
145 | start = pos; |
146 | if (ch == apos || ch == quot) { |
147 | quote = ch; |
148 | } else if (ch == endTag) { |
149 | ++pos; |
150 | setFormat(start, count: pos - start, format: m_formats[Tag]); |
151 | state = NormalState; |
152 | break; |
153 | } else if (text.mid(position: pos, n: 2) == endElement) { |
154 | pos += 2; |
155 | setFormat(start, count: pos - start, format: m_formats[Tag]); |
156 | state = NormalState; |
157 | break; |
158 | } else if (ch != space && text.at(i: pos) != tab) { |
159 | // Tag not ending, not a quote and no whitespace, so |
160 | // we must be dealing with an attribute. |
161 | ++pos; |
162 | while (pos < len && text.at(i: pos) != space |
163 | && text.at(i: pos) != tab |
164 | && text.at(i: pos) != equals) |
165 | ++pos; |
166 | setFormat(start, count: pos - start, format: m_formats[Attribute]); |
167 | start = pos; |
168 | } |
169 | } else if (ch == quote) { |
170 | quote = QChar::Null; |
171 | |
172 | // Anything quoted is a value |
173 | setFormat(start, count: pos - start, format: m_formats[Value]); |
174 | } |
175 | ++pos; |
176 | } |
177 | break; |
178 | } |
179 | } |
180 | setCurrentBlockState(state); |
181 | } |
182 | |
183 | } // namespace qdesigner_internal |
184 | |
185 | QT_END_NAMESPACE |
186 | |