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50
51#include "xmlsyntaxhighlighter.h"
52
53XmlSyntaxHighlighter::XmlSyntaxHighlighter(QTextDocument *parent)
54 : QSyntaxHighlighter(parent)
55{
56 HighlightingRule rule;
57
58 // tag format
59 tagFormat.setForeground(Qt::darkBlue);
60 tagFormat.setFontWeight(QFont::Bold);
61 rule.pattern = QRegExp("(<[a-zA-Z:]+\\b|<\\?[a-zA-Z:]+\\b|\\?>|>|/>|</[a-zA-Z:]+>)");
62 rule.format = tagFormat;
63 highlightingRules.append(t: rule);
64
65 // attribute format
66 attributeFormat.setForeground(Qt::darkGreen);
67 rule.pattern = QRegExp("[a-zA-Z:]+=");
68 rule.format = attributeFormat;
69 highlightingRules.append(t: rule);
70
71 // attribute content format
72 attributeContentFormat.setForeground(Qt::red);
73 rule.pattern = QRegExp("(\"[^\"]*\"|'[^']*')");
74 rule.format = attributeContentFormat;
75 highlightingRules.append(t: rule);
76
77 commentFormat.setForeground(Qt::lightGray);
78 commentFormat.setFontItalic(true);
79
80 commentStartExpression = QRegExp("<!--");
81 commentEndExpression = QRegExp("-->");
82}
83
84void XmlSyntaxHighlighter::highlightBlock(const QString &text)
85{
86 for (const HighlightingRule &rule : qAsConst(t&: highlightingRules)) {
87 QRegExp expression(rule.pattern);
88 int index = text.indexOf(expression);
89 while (index >= 0) {
90 int length = expression.matchedLength();
91 setFormat(start: index, count: length, format: rule.format);
92 index = text.indexOf(expression, from: index + length);
93 }
94 }
95 setCurrentBlockState(0);
96
97 int startIndex = 0;
98 if (previousBlockState() != 1)
99 startIndex = text.indexOf(commentStartExpression);
100
101 while (startIndex >= 0) {
102 int endIndex = text.indexOf(commentEndExpression, from: startIndex);
103 int commentLength;
104 if (endIndex == -1) {
105 setCurrentBlockState(1);
106 commentLength = text.length() - startIndex;
107 } else {
108 commentLength = endIndex - startIndex
109 + commentEndExpression.matchedLength();
110 }
111 setFormat(start: startIndex, count: commentLength, format: commentFormat);
112 startIndex = text.indexOf(commentStartExpression,
113 from: startIndex + commentLength);
114 }
115}
116

source code of qtxmlpatterns/examples/xmlpatterns/shared/xmlsyntaxhighlighter.cpp