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diff --git a/starmath/inc/edit.hxx b/starmath/inc/edit.hxx
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+/* -*- 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/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+#ifndef INCLUDED_STARMATH_INC_EDIT_HXX
+#define INCLUDED_STARMATH_INC_EDIT_HXX
+
+#include <vcl/window.hxx>
+#include <vcl/idle.hxx>
+#include <vcl/transfer.hxx>
+#include <editeng/editdata.hxx>
+#include <memory>
+
+class SmDocShell;
+class SmViewShell;
+class EditView;
+class EditEngine;
+class EditStatus;
+class ScrollBar;
+class ScrollBarBox;
+class DataChangedEvent;
+class SmCmdBoxWindow;
+class SmEditAccessible;
+class CommandEvent;
+class Timer;
+
+namespace svtools { class ColorConfig; }
+
+void SmGetLeftSelectionPart(const ESelection &rSelection, sal_Int32 &nPara, sal_uInt16 &nPos);
+
+class SmEditWindow final : public vcl::Window, public DropTargetHelper
+{
+    rtl::Reference<SmEditAccessible> mxAccessible;
+
+    SmCmdBoxWindow& rCmdBox;
+    std::unique_ptr<EditView> pEditView;
+    VclPtr<ScrollBar> pHScrollBar;
+    VclPtr<ScrollBar> pVScrollBar;
+    VclPtr<ScrollBarBox> pScrollBox;
+    Idle aModifyIdle;
+    Idle aCursorMoveIdle;
+    ESelection aOldSelection;
+
+    virtual void KeyInput(const KeyEvent& rKEvt) override;
+    virtual void Command(const CommandEvent& rCEvt) override;
+
+    DECL_LINK(ModifyTimerHdl, Timer *, void);
+    DECL_LINK(CursorMoveTimerHdl, Timer *, void);
+
+    virtual void ApplySettings(vcl::RenderContext&) override;
+    virtual void DataChanged( const DataChangedEvent& ) override;
+    virtual void Resize() override;
+    virtual void MouseMove(const MouseEvent &rEvt) override;
+    virtual void MouseButtonUp(const MouseEvent &rEvt) override;
+    virtual void MouseButtonDown(const MouseEvent &rEvt) override;
+
+    virtual sal_Int8 AcceptDrop( const AcceptDropEvent& rEvt ) override;
+    virtual sal_Int8 ExecuteDrop( const ExecuteDropEvent& rEvt ) override;
+    virtual void Paint(vcl::RenderContext& rRenderContext, const tools::Rectangle& rRect) override;
+
+    DECL_LINK(EditStatusHdl, EditStatus&, void);
+    DECL_LINK(ScrollHdl, ScrollBar*, void);
+
+    void CreateEditView();
+    tools::Rectangle AdjustScrollBars();
+    void SetScrollBarRanges();
+    void InitScrollBars();
+    void InvalidateSlots();
+    void UpdateStatus(bool bSetDocModified);
+
+public:
+    explicit SmEditWindow(SmCmdBoxWindow& rMyCmdBoxWin);
+    virtual ~SmEditWindow() override;
+    virtual void dispose() override;
+
+    SmDocShell* GetDoc();
+    SmViewShell* GetView();
+    EditView* GetEditView();
+    EditEngine* GetEditEngine();
+
+    // Window
+    virtual void SetText(const OUString& rText) override;
+    virtual OUString GetText() const override;
+    virtual void GetFocus() override;
+    virtual void LoseFocus() override;
+
+    ESelection GetSelection() const;
+    void SetSelection(const ESelection& rSel);
+
+    bool IsEmpty() const;
+    bool IsSelected() const;
+    bool IsAllSelected() const;
+    void Cut();
+    void Copy();
+    void Paste();
+    void Delete();
+    void SelectAll();
+    void InsertText(const OUString& rText);
+    void MarkError(const Point &rPos);
+    void SelNextMark();
+    void SelPrevMark();
+    static bool HasMark(const OUString &rText);
+
+    void Flush() override;
+    void DeleteEditView();
+
+    bool HandleWheelCommands(const CommandEvent& rCEvt);
+    bool IsInlineEditEnabled();
+    void StartCursorMove();
+
+    // for Accessibility
+    virtual css::uno::Reference<css::accessibility::XAccessible> CreateAccessible() override;
+
+    using Window::GetAccessible;
+};
+
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */