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codeeditor.h
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123 lines (94 loc) · 2.88 KB
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#ifndef CODEEDITOR_H
#define CODEEDITOR_H
#include <QSyntaxHighlighter>
#include <QPlainTextEdit>
#include <QObject>
#include <QRegularExpression>
#include "codeeditorstyle.h"
class QPaintEvent;
class QResizeEvent;
class QSize;
class QWidget;
class LineNumberArea;
class Highlighter : public QSyntaxHighlighter {
Q_OBJECT
public:
explicit Highlighter(QTextDocument *parent,
CodeEditorStyle *widgetStyle);
void setSymbols(const QStringList &symbols);
void setStyle(const CodeEditorStyle &newStyle);
protected:
void highlightBlock(const QString &text) override;
private:
enum RuleRole {
Keyword = 1,
Class = 2,
Comment = 3,
Quote = 4,
Symbol = 5
};
struct HighlightingRule {
QRegularExpression pattern;
QTextCharFormat format;
RuleRole ruleRole;
};
void applyFormat(HighlightingRule &rule);
QVector<HighlightingRule> mHighlightingRules;
QVector<HighlightingRule> mHighlightingRulesWithSymbols;
QRegularExpression mCommentStartExpression;
QRegularExpression mCommentEndExpression;
QTextCharFormat mKeywordFormat;
QTextCharFormat mClassFormat;
QTextCharFormat mSingleLineCommentFormat;
QTextCharFormat mMultiLineCommentFormat;
QTextCharFormat mQuotationFormat;
QTextCharFormat mSymbolFormat;
CodeEditorStyle *mWidgetStyle;
};
class CodeEditor : public QPlainTextEdit {
Q_OBJECT
public:
explicit CodeEditor(QWidget *parent);
CodeEditor(const CodeEditor &) = delete;
CodeEditor &operator=(const CodeEditor &) = delete;
~CodeEditor();
void lineNumberAreaPaintEvent(QPaintEvent *event);
int lineNumberAreaWidth();
void setStyle(const CodeEditorStyle& newStyle);
/**
* Set source code to show, goto error line and highlight that line.
* \param code The source code.
* \param errorLine line number
* \param symbols the related symbols, these are marked
*/
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:
QString generateStyleString();
private:
QWidget *mLineNumberArea;
Highlighter *mHighlighter;
CodeEditorStyle *mWidgetStyle;
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