ui: basic CodeView with syntax highlighting

Added CodeView interface and QtCodeView implementation for showing syntax highlighted code snippets. This change avoids using the GuiElement hierarchy by using directly using QtClasses and creating QtCodeView in the QtElementFactory.
2014-06-30 13:50:19 +02:00
parent 1045ce4ab9
commit 73b74cb618
17 changed files with 325 additions and 17 deletions
@@ -0,0 +1,98 @@
+#include "qt/utility/QtHighlighter.h"
+
+QtHighlighter::QtHighlighter(QTextDocument *parent)
+	: QSyntaxHighlighter(parent)
+{
+	HighlightingRule rule;
+
+	keywordFormat.setForeground(Qt::darkBlue);
+	keywordFormat.setFontWeight(QFont::Bold);
+
+	QStringList keywordPatterns;
+	keywordPatterns
+		<< "\\bchar\\b" << "\\bclass\\b" << "\\bconst\\b"
+		<< "\\bdouble\\b" << "\\benum\\b" << "\\bexplicit\\b"
+		<< "\\bfriend\\b" << "\\binline\\b" << "\\bint\\b"
+		<< "\\blong\\b" << "\\bnamespace\\b" << "\\boperator\\b"
+		<< "\\bprivate\\b" << "\\bprotected\\b" << "\\bpublic\\b"
+		<< "\\bshort\\b" << "\\bsignals\\b" << "\\bsigned\\b"
+		<< "\\bslots\\b" << "\\bstatic\\b" << "\\bstruct\\b"
+		<< "\\btemplate\\b" << "\\btypedef\\b" << "\\btypename\\b"
+		<< "\\bunion\\b" << "\\bunsigned\\b" << "\\bvirtual\\b"
+		<< "\\bvoid\\b" << "\\bvolatile\\b";
+
+	foreach (const QString &pattern, keywordPatterns)
+	{
+		rule.pattern = QRegExp(pattern);
+		rule.format = keywordFormat;
+		highlightingRules.append(rule);
+	}
+
+	classFormat.setFontWeight(QFont::Bold);
+	classFormat.setForeground(Qt::darkMagenta);
+	rule.pattern = QRegExp("\\bQ[A-Za-z]+\\b");
+	rule.format = classFormat;
+	highlightingRules.append(rule);
+
+	singleLineCommentFormat.setForeground(Qt::red);
+	rule.pattern = QRegExp("//[^\n]*");
+	rule.format = singleLineCommentFormat;
+	highlightingRules.append(rule);
+
+	multiLineCommentFormat.setForeground(Qt::red);
+
+	quotationFormat.setForeground(Qt::darkGreen);
+	rule.pattern = QRegExp("\".*\"");
+	rule.format = quotationFormat;
+	highlightingRules.append(rule);
+
+	functionFormat.setFontItalic(true);
+	functionFormat.setForeground(Qt::blue);
+	rule.pattern = QRegExp("\\b[A-Za-z0-9_]+(?=\\()");
+	rule.format = functionFormat;
+	highlightingRules.append(rule);
+
+	commentStartExpression = QRegExp("/\\*");
+	commentEndExpression = QRegExp("\\*/");
+}
+
+void QtHighlighter::highlightBlock(const QString &text)
+{
+	foreach (const HighlightingRule &rule, highlightingRules)
+	{
+		QRegExp expression(rule.pattern);
+		int index = expression.indexIn(text);
+		while (index >= 0)
+		{
+			int length = expression.matchedLength();
+			setFormat(index, length, rule.format);
+			index = expression.indexIn(text, index + length);
+		}
+	}
+	setCurrentBlockState(0);
+
+	int startIndex = 0;
+	if (previousBlockState() != 1)
+	{
+		startIndex = commentStartExpression.indexIn(text);
+	}
+
+	while (startIndex >= 0)
+	{
+		int endIndex = commentEndExpression.indexIn(text, startIndex);
+		int commentLength;
+
+		if (endIndex == -1)
+		{
+			setCurrentBlockState(1);
+			commentLength = text.length() - startIndex;
+		}
+		else
+		{
+			commentLength = endIndex - startIndex + commentEndExpression.matchedLength();
+		}
+
+		setFormat(startIndex, commentLength, multiLineCommentFormat);
+		startIndex = commentStartExpression.indexIn(text, startIndex + commentLength);
+	}
+}
@@ -0,0 +1,38 @@
+#ifndef QT_HIGHLIGHTER_H
+#define QT_HIGHLIGHTER_H
+
+#include <QSyntaxHighlighter>
+#include <QTextCharFormat>
+
+class QTextDocument;
+
+class QtHighlighter : public QSyntaxHighlighter
+{
+    Q_OBJECT
+
+public:
+    QtHighlighter(QTextDocument *parent = 0);
+
+protected:
+    void highlightBlock(const QString &text);
+
+private:
+    struct HighlightingRule
+    {
+        QRegExp pattern;
+        QTextCharFormat format;
+    };
+    QVector<HighlightingRule> highlightingRules;
+
+    QRegExp commentStartExpression;
+    QRegExp commentEndExpression;
+
+    QTextCharFormat keywordFormat;
+    QTextCharFormat classFormat;
+    QTextCharFormat singleLineCommentFormat;
+    QTextCharFormat multiLineCommentFormat;
+    QTextCharFormat quotationFormat;
+    QTextCharFormat functionFormat;
+};
+
+#endif // QT_HIGHLIGHTER_H