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barecode/src/editor/CodeEditor.h

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+#pragma once
+
+#include <QPlainTextEdit>
+#include <QFont>
+#include <QString>
+#include <QTextBlock>
+
+class LineNumberArea;
+class Settings;
+class SyntaxHighlighter;
+class ColorIndicator;
+class SignatureHelper;
+class FunctionIndex;
+class VariableCompleter;
+
+// ---------------------------------------------------------------------------
+// CodeEditor – Core editing widget.
+// Features:
+//   • Line number gutter
+//   • Current-line highlight
+//   • Auto-indent on Enter
+//   • Tab → spaces (configurable)
+//   • Syntax highlighting (via pluggable SyntaxHighlighter)
+// ---------------------------------------------------------------------------
+class CodeEditor : public QPlainTextEdit
+{
+    Q_OBJECT
+
+public:
+    explicit CodeEditor(Settings *settings, QWidget *parent = nullptr);
+    ~CodeEditor() override;
+
+    void loadFile(const QString &filePath);
+    void applySettings();
+
+    // Speichern
+    bool save();
+    bool saveAs();
+
+    // Called by LineNumberArea
+    int  lineNumberAreaWidth() const;
+    void lineNumberAreaPaintEvent(QPaintEvent *event);
+
+    QString filePath()   const;
+    bool    isModified() const;
+
+    // Öffentliche Hilfsmethoden für ColorIndicator
+    // (die Qt-Originale sind protected und von außen nicht erreichbar)
+    QTextBlock firstVisibleBlockPublic() const  { return firstVisibleBlock(); }
+    QRectF     blockBoundingGeometryPublic(const QTextBlock &b) const { return blockBoundingGeometry(b); }
+    QPointF    contentOffsetPublic() const      { return contentOffset(); }
+
+    void setFunctionIndex(FunctionIndex *index);
+
+signals:
+    void fileSaved(const QString &filePath);
+    void navigateToRequested(const QString &filePath, int line);
+
+protected:
+    void resizeEvent(QResizeEvent *event) override;
+    void keyPressEvent(QKeyEvent *event) override;
+    void paintEvent(QPaintEvent *event) override;
+    void mousePressEvent(QMouseEvent *event) override;
+    void mouseDoubleClickEvent(QMouseEvent *event) override;
+    void focusOutEvent(QFocusEvent *event) override;
+
+private slots:
+    void updateLineNumberAreaWidth(int newBlockCount);
+    void highlightCurrentLine();
+    void updateLineNumberArea(const QRect &rect, int dy);
+
+private:
+    void setupEditor();
+    void installHighlighter(const QString &filePath);
+    bool writeToFile(const QString &filePath);
+    void matchBrackets(QList<QTextEdit::ExtraSelection> &selections);
+
+    Settings          *m_settings        = nullptr;
+    LineNumberArea    *m_lineNumberArea   = nullptr;
+    SyntaxHighlighter *m_highlighter      = nullptr;
+    ColorIndicator    *m_colorIndicator   = nullptr;
+    SignatureHelper   *m_signatureHelper  = nullptr;
+    FunctionIndex     *m_functionIndex    = nullptr;
+    VariableCompleter *m_varCompleter     = nullptr;
+    QString            m_filePath;
+};