// TortoiseMerge - a Diff/Patch program

// Copyright (C) 2006, 2011, 2020 - TortoiseSVN

// This program 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 2
// of the License, or (at your option) any later version.

// This program 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 this program; if not, write to the Free Software Foundation,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
#pragma once


/**
 * \ingroup TortoiseMerge
 * Extends the MFC CSplitterWnd with the functionality to
 * Show/Hide specific columns and rows, allows to lock
 * the splitter bars so the user can't move them
 * and also allows dynamic replacing of views with
 * other views.
 *
 * \par requirements
 * win98 or later\n
 * win2k or later\n
 * MFC\n
 *
 */
class CXSplitter : public CSplitterWnd
{
public:
    CXSplitter();
    virtual ~CXSplitter();

public:
    /**
     * Checks if the splitter has its bars locked.
     */
    BOOL        IsBarLocked() const  {return m_bBarLocked;}
    /**
     * Locks/Unlocks the bar so the user can't move it.
     * \param bState TRUE to lock, FALSE to unlock
     */
    void        LockBar(BOOL bState=TRUE) {m_bBarLocked=bState;}
    /**
     * Shows a splitter column which was previously hidden. Don't call
     * this method if the column is already visible! Check it first
     * with IsColumnHidden()
     */
    void        ShowColumn();
    /**
     * Hides the given splitter column. Don't call this method on already hidden columns!
     * Check it first with IsColumnHidden()
     * \param nColHide The column to hide
     */
    void        HideColumn(int nColHide);
    /**
     * Checks if a given column is hidden.
     */
    BOOL        IsColumnHidden(int nCol) const {return (m_nHiddenCol == nCol);}
    /**
     * Shows a splitter row which was previously hidden. Don't call
     * this method if the row is already visible! Check it first
     * with IsRowHidden()
     */
    void        ShowRow();
    /**
     * Hides the given splitter row. Don't call this method on already hidden rows!
     * Check it first with IsRowHidden()
     * \param nRowHide The row to hide
     */
    void        HideRow(int nRowHide);
    /**
     * Checks if a given row is hidden.
     */
    BOOL        IsRowHidden(int nRow) const  {return (m_nHiddenRow == nRow);}

    /**
     * Centers the splitter in the middle of the views
     */
    void        CenterSplitter();

    int         GetOldRowCount() { return m_nOldRows; }
    int         GetOldColCount() { return m_nOldCols; }
    bool        HasOldRowSize() { return m_pRowOldSize != nullptr; }
    bool        HasOldColSize() { return m_pColOldSize != nullptr; }
    int         GetOldRowSize(int index) { return m_pRowOldSize[index]; }
    int         GetOldColSize(int index) { return m_pColOldSize[index]; }

protected:
    afx_msg void OnLButtonDblClk(UINT nFlags, CPoint point);
    afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
    afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
    afx_msg void OnMouseMove(UINT nFlags, CPoint point);
    afx_msg BOOL OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message);
    DECLARE_MESSAGE_MAP()

    void        CopyRowAndColInfo();
    void        OnDrawSplitter(CDC* pDC, ESplitType nType, const CRect& rect);
private:
    BOOL        m_bBarLocked;   ///< is the splitter bar locked?
    int         m_nHiddenCol;   ///< Index of the hidden column.
    int         m_nHiddenRow;   ///< Index of the hidden row
    int *       m_pColOldSize;  ///< the current size of the last splitter positioning
    int *       m_pRowOldSize;  ///< the current size of the last splitter positioning
    int         m_nOldCols;
    int         m_nOldRows;
};