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codeeditor.h
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94 lines (70 loc) · 2.13 KB
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#ifndef CODEEDITOR_H
#define CODEEDITOR_H
#include <QSyntaxHighlighter>
#include <QPlainTextEdit>
#include <QObject>
#include <QRegularExpression>
class QPaintEvent;
class QResizeEvent;
class QSize;
class QWidget;
class LineNumberArea;
class Highlighter : public QSyntaxHighlighter {
Q_OBJECT
public:
explicit Highlighter(QTextDocument *parent);
void setSymbols(const QStringList &symbols);
protected:
void highlightBlock(const QString &text) override;
private:
struct HighlightingRule {
QRegularExpression pattern;
QTextCharFormat format;
};
QVector<HighlightingRule> mHighlightingRules;
QVector<HighlightingRule> mHighlightingRulesWithSymbols;
QRegularExpression mCommentStartExpression;
QRegularExpression mCommentEndExpression;
QTextCharFormat mKeywordFormat;
QTextCharFormat mClassFormat;
QTextCharFormat mSingleLineCommentFormat;
QTextCharFormat mMultiLineCommentFormat;
QTextCharFormat mQuotationFormat;
QTextCharFormat mSymbolFormat;
};
class CodeEditor : public QPlainTextEdit {
Q_OBJECT
public:
explicit CodeEditor(QWidget *parent);
CodeEditor(const CodeEditor &) = delete;
CodeEditor &operator=(const CodeEditor &) = delete;
void lineNumberAreaPaintEvent(QPaintEvent *event);
int lineNumberAreaWidth();
void setError(const QString &code, int errorLine, const QStringList &symbols);
protected:
void resizeEvent(QResizeEvent *event) override;
private slots:
void updateLineNumberAreaWidth(int newBlockCount);
void highlightErrorLine();
void updateLineNumberArea(const QRect &, int);
private:
QWidget *mLineNumberArea;
Highlighter *mHighlighter;
int mErrorPosition;
};
class LineNumberArea : public QWidget {
public:
explicit LineNumberArea(CodeEditor *editor) : QWidget(editor) {
mCodeEditor = editor;
}
QSize sizeHint() const override {
return QSize(mCodeEditor->lineNumberAreaWidth(), 0);
}
protected:
void paintEvent(QPaintEvent *event) override {
mCodeEditor->lineNumberAreaPaintEvent(event);
}
private:
CodeEditor *mCodeEditor;
};
#endif // CODEEDITOR_H