Fix reading context

DocumentContextReader.hpp

@@ -0,0 +1,43 @@
+/* 
+ * Copyright (C) 2024 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QTextDocument>
+
+namespace QodeAssist {
+
+class DocumentContextReader
+{
+public:
+    DocumentContextReader(QTextDocument *doc)
+        : m_document(doc)
+    {}
+
+    QString getLineText(int lineNumber, int cursorPosition = -1) const;
+    QString getContextBefore(int lineNumber, int cursorPosition, int linesCount) const;
+    QString getContextAfter(int lineNumber, int cursorPosition, int linesCount) const;
+    QString readWholeFileBefore(int lineNumber, int cursorPosition) const;
+    QString readWholeFileAfter(int lineNumber, int cursorPosition) const;
+
+private:
+    QTextDocument *m_document;
+};
+
+} // namespace QodeAssist