101 lines
2.4 KiB
C++
101 lines
2.4 KiB
C++
#ifndef CODEEDITOR_H
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#define CODEEDITOR_H
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#include <QSyntaxHighlighter>
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#include <QPlainTextEdit>
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#include <QObject>
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#include <QRegularExpression>
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class QPaintEvent;
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class QResizeEvent;
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class QSize;
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class QWidget;
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class LineNumberArea;
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class Highlighter : public QSyntaxHighlighter {
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Q_OBJECT
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public:
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explicit Highlighter(QTextDocument *parent);
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void setSymbols(const QStringList &symbols);
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protected:
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void highlightBlock(const QString &text) override;
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private:
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struct HighlightingRule {
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QRegularExpression pattern;
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QTextCharFormat format;
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};
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QVector<HighlightingRule> mHighlightingRules;
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QVector<HighlightingRule> mHighlightingRulesWithSymbols;
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QRegularExpression mCommentStartExpression;
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QRegularExpression mCommentEndExpression;
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QTextCharFormat mKeywordFormat;
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QTextCharFormat mClassFormat;
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QTextCharFormat mSingleLineCommentFormat;
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QTextCharFormat mMultiLineCommentFormat;
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QTextCharFormat mQuotationFormat;
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QTextCharFormat mSymbolFormat;
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};
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class CodeEditor : public QPlainTextEdit {
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Q_OBJECT
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public:
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explicit CodeEditor(QWidget *parent);
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CodeEditor(const CodeEditor &) = delete;
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CodeEditor &operator=(const CodeEditor &) = delete;
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void lineNumberAreaPaintEvent(QPaintEvent *event);
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int lineNumberAreaWidth();
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/**
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* Set source code to show, goto error line and highlight that line.
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* \param code The source code.
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* \param errorLine line number
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* \param symbols the related symbols, these are marked
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*/
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void setError(const QString &code, int errorLine, const QStringList &symbols);
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protected:
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void resizeEvent(QResizeEvent *event) override;
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private slots:
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void updateLineNumberAreaWidth(int newBlockCount);
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void highlightErrorLine();
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void updateLineNumberArea(const QRect &, int);
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private:
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QWidget *mLineNumberArea;
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Highlighter *mHighlighter;
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int mErrorPosition;
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};
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class LineNumberArea : public QWidget {
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public:
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explicit LineNumberArea(CodeEditor *editor) : QWidget(editor) {
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mCodeEditor = editor;
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}
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QSize sizeHint() const override {
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return QSize(mCodeEditor->lineNumberAreaWidth(), 0);
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}
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protected:
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void paintEvent(QPaintEvent *event) override {
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mCodeEditor->lineNumberAreaPaintEvent(event);
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}
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private:
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CodeEditor *mCodeEditor;
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};
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#endif // CODEEDITOR_H
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