1 files changed, 71 insertions, 0 deletions
diff --git a/sc/inc/grouparealistener.hxx b/sc/inc/grouparealistener.hxx
new file mode 100644
index 000000000..d823fc987
--- /dev/null
+++ b/sc/inc/grouparealistener.hxx
@@ -0,0 +1,71 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include "address.hxx"
+
+#include <svl/listener.hxx>
+
+#include <vector>
+
+class ScFormulaCell;
+class ScDocument;
+class ScColumn;
+
+namespace sc {
+
+class BulkDataHint;
+
+class FormulaGroupAreaListener final : public SvtListener
+{
+    ScRange maRange;
+    const ScDocument& mrDocument;
+    const ScColumn* mpColumn;
+    SCROW mnTopCellRow;
+    SCROW mnGroupLen;
+    bool mbStartFixed;
+    bool mbEndFixed;
+
+public:
+
+    FormulaGroupAreaListener() = delete;
+    FormulaGroupAreaListener( const ScRange& rRange, const ScDocument& rDocument,
+            const ScAddress& rTopCellPos, SCROW nGroupLen, bool bStartFixed, bool bEndFixed );
+
+    virtual ~FormulaGroupAreaListener() override;
+
+    ScRange getListeningRange() const;
+
+    virtual void Notify( const SfxHint& rHint ) override;
+    virtual void Query( QueryBase& rQuery ) const override;
+
+    /**
+     * Given the row span of changed cells within a single column, collect all
+     * formula cells that need to be notified of the change.
+     *
+     * @param nTab sheet position of the changed cell span.
+     * @param nCol column position of the changed cell span.
+     * @param nRow1 top row position of the changed cell span.
+     * @param nRow2 bottom row position of the changed cell span.
+     * @param rCells all formula cells that need to be notified are put into
+     *               this container.
+     */
+    void collectFormulaCells( SCTAB nTab, SCCOL nCol, SCROW nRow1, SCROW nRow2, std::vector<ScFormulaCell*>& rCells ) const;
+    void collectFormulaCells( SCROW nRow1, SCROW nRow2, std::vector<ScFormulaCell*>& rCells ) const;
+
+private:
+    void notifyCellChange( const SfxHint& rHint, const ScAddress& rPos, SCROW nNumRows );
+    void notifyBulkChange( const BulkDataHint& rHint );
+    const ScFormulaCell* getTopCell() const;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */