Erste Version

src/highlighter/SyntaxHighlighter.h

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+#pragma once
+
+#include <QSyntaxHighlighter>
+#include <QTextCharFormat>
+#include <QRegularExpression>
+#include <QVector>
+
+// ---------------------------------------------------------------------------
+// SyntaxHighlighter – Regelbasierte Basis-Klasse.
+// Unterklassen befüllen m_rules und können highlightBlock() überschreiben
+// um mehrzeilige Konstrukte (Block-Kommentare, heredocs, …) zu behandeln.
+// ---------------------------------------------------------------------------
+class SyntaxHighlighter : public QSyntaxHighlighter
+{
+    Q_OBJECT
+
+public:
+    explicit SyntaxHighlighter(QTextDocument *parent = nullptr);
+
+protected:
+    struct HighlightRule
+    {
+        QRegularExpression pattern;
+        QTextCharFormat    format;
+    };
+
+    void highlightBlock(const QString &text) override;
+
+    // Unterklassen befüllen dies im Konstruktor
+    QVector<HighlightRule> m_rules;
+
+    // Mehrzeilige Block-Kommentare (/* ... */)
+    QRegularExpression m_commentStartExpression;
+    QRegularExpression m_commentEndExpression;
+    QTextCharFormat    m_multiLineCommentFormat;
+    bool               m_hasMultiLineComment = false;
+};
+
+// ---------------------------------------------------------------------------
+// CppHighlighter – C und C++
+// ---------------------------------------------------------------------------
+class CppHighlighter : public SyntaxHighlighter
+{
+    Q_OBJECT
+public:
+    explicit CppHighlighter(QTextDocument *parent = nullptr);
+protected:
+    void highlightBlock(const QString &text) override;
+};
+
+// ---------------------------------------------------------------------------
+// CssHighlighter – CSS
+// ---------------------------------------------------------------------------
+class CssHighlighter : public SyntaxHighlighter
+{
+    Q_OBJECT
+public:
+    explicit CssHighlighter(QTextDocument *parent = nullptr);
+protected:
+    void highlightBlock(const QString &text) override;
+};
+
+// ---------------------------------------------------------------------------
+// HtmlHighlighter – HTML (mit eingebettetem CSS in <style> und JS in <script>)
+// ---------------------------------------------------------------------------
+class HtmlHighlighter : public SyntaxHighlighter
+{
+    Q_OBJECT
+public:
+    explicit HtmlHighlighter(QTextDocument *parent = nullptr);
+protected:
+    void highlightBlock(const QString &text) override;
+};
+
+// ---------------------------------------------------------------------------
+// PhpHighlighter – PHP (HTML + eingebettetes PHP zwischen <?php ... ?>)
+// ---------------------------------------------------------------------------
+class PhpHighlighter : public SyntaxHighlighter
+{
+    Q_OBJECT
+public:
+    explicit PhpHighlighter(QTextDocument *parent = nullptr);
+protected:
+    void highlightBlock(const QString &text) override;
+
+private:
+    // Hilfsmethode: wendet PHP-Regeln auf einen Teilbereich an
+    void highlightPhpRange(const QString &text, int start, int length);
+
+    QVector<HighlightRule> m_phpRules;
+    QTextCharFormat        m_phpStringFormat;
+    QTextCharFormat        m_phpCommentFormat;
+    QTextCharFormat        m_phpTagFormat;
+};