add QCodeEditor

external/QCodeEditor/include/internal/QJSONHighlighter.hpp

@@ -0,0 +1,33 @@
+#pragma once
+
+// QCodeEditor
+#include <QStyleSyntaxHighlighter> // Required for inheritance
+#include <QHighlightRule>
+
+// Qt
+#include <QVector>
+
+/**
+ * @brief Class, that describes JSON code
+ * highlighter.
+ */
+class QJSONHighlighter : public QStyleSyntaxHighlighter
+{
+    Q_OBJECT
+public:
+
+    /**
+     * @brief Constructor.
+     * @param document Pointer to document.
+     */
+    explicit QJSONHighlighter(QTextDocument* document=nullptr);
+
+protected:
+
+    void highlightBlock(const QString& text) override;
+
+private:
+    QVector<QHighlightRule> m_highlightRules;
+    QRegularExpression m_keyRegex;
+};
+