/***************************************************************************
 *   Copyright (c) Eivind Kvedalen (eivind@kvedalen.name) 2015             *
 *                                                                         *
 *   This file is part of the FreeCAD CAx development system.              *
 *                                                                         *
 *   This library is free software; you can redistribute it and/or         *
 *   modify it under the terms of the GNU Library General Public           *
 *   License as published by the Free Software Foundation; either          *
 *   version 2 of the License, or (at your option) any later version.      *
 *                                                                         *
 *   This library  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 Library General Public License for more details.                  *
 *                                                                         *
 *   You should have received a copy of the GNU Library General Public     *
 *   License along with this library; see the file COPYING.LIB. If not,    *
 *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
 *   Suite 330, Boston, MA  02111-1307, USA                                *
 *                                                                         *
 ***************************************************************************/

#ifndef CELL_H
#define CELL_H

#include <string>
#include <set>
#include <App/Material.h>
#include <App/Range.h>
#include "DisplayUnit.h"
#include "Utils.h"

namespace Base {
class Unit;
class XMLReader;
class Writer;
}

namespace App {
class Expression;
class ExpressionVisitor;
}

namespace Spreadsheet {

class PropertySheet;
class DisplayUnit;

class SpreadsheetExport Cell {
private:
    Cell(const Cell & other);
public:

    Cell(const App::CellAddress & _address, PropertySheet * _owner);

    Cell(PropertySheet * _owner, const Cell & other);

    Cell& operator=( const Cell& rhs );

    ~Cell();

    const App::Expression * getExpression() const;

    bool getStringContent(std::string & s) const;

    void setContent(const char * value);

    void setAlignment(int _alignment);
    bool getAlignment(int & _alignment) const;

    void setStyle(const std::set<std::string> & _style);
    bool getStyle(std::set<std::string> & style) const;

    void setForeground(const App::Color &color);
    bool getForeground(App::Color &color) const;

    void setBackground(const App::Color &color);
    bool getBackground(App::Color &color) const;

    void setDisplayUnit(const std::string & unit);
    bool getDisplayUnit(DisplayUnit &unit) const;

    void setAlias(const std::string & n);
    bool getAlias(std::string & n ) const;

    void setComputedUnit(const Base::Unit & unit);
    bool getComputedUnit(Base::Unit & unit) const;

    void setSpans(int rows, int columns);
    bool getSpans(int & rows, int & columns) const;

    void setException(const std::string & e);

    void clearException();

    void clearDirty();

    void setResolveException(const std::string &e);

    void clearResolveException();

    const std::string &getException() const { return exceptionStr; }

    bool hasException() const { return isUsed(EXCEPTION_SET) || isUsed(PARSE_EXCEPTION_SET) || isUsed(RESOLVE_EXCEPTION_SET); }

    void moveAbsolute(App::CellAddress newAddress);

    void restore(Base::XMLReader &reader);

    void save(Base::Writer &writer) const;

    bool isUsed() const;

    void mark() { setUsed(MARK_SET); }

    bool isMarked() const { return isUsed(MARK_SET); }

    bool spansChanged() const { return isUsed(SPANS_UPDATED); }

    void visit(App::ExpressionVisitor & v);

    App::CellAddress getAddress() const { return address; }

    /* Alignment */
    static const int ALIGNMENT_LEFT;
    static const int ALIGNMENT_HCENTER;
    static const int ALIGNMENT_RIGHT;
    static const int ALIGNMENT_HORIZONTAL;
    static const int ALIGNMENT_HIMPLIED;
    static const int ALIGNMENT_TOP;
    static const int ALIGNMENT_VCENTER;
    static const int ALIGNMENT_BOTTOM;
    static const int ALIGNMENT_VERTICAL;
    static const int ALIGNMENT_VIMPLIED;

    /* Static functions */
    static int decodeAlignment(const std::string &itemStr, int alignment);
    static std::string encodeAlignment(int alignment);

    static std::string encodeStyle(const std::set<std::string> &style);

    static std::string encodeColor(const App::Color &color);
    static App::Color decodeColor(const std::string &color, const App::Color &defaultColor);

private:

    void setParseException(const std::string & e);

    //void setExpression(const Expression * expr);

    void setExpression(App::Expression *expr);

    void setUsed(int mask, bool state = true);

    bool isUsed(int mask) const;

    void freeze();

    void unfreeze();

    /* Used */
    static const int EXPRESSION_SET;
    static const int ALIGNMENT_SET;
    static const int STYLE_SET;
    static const int BACKGROUND_COLOR_SET;
    static const int FOREGROUND_COLOR_SET;
    static const int DISPLAY_UNIT_SET;
    static const int COMPUTED_UNIT_SET;
    static const int ALIAS_SET;
    static const int SPANS_SET;
    static const int MARK_SET;
    static const int SPANS_UPDATED;
    static const int EXCEPTION_SET;
    static const int PARSE_EXCEPTION_SET;
    static const int RESOLVE_EXCEPTION_SET;

    App::CellAddress address;
    PropertySheet * owner;

    int used;
    App::Expression * expression;
    int alignment;
    std::set<std::string> style;
    App::Color foregroundColor;
    App::Color backgroundColor;
    DisplayUnit displayUnit;
    std::string alias;
    Base::Unit computedUnit;
    int rowSpan;
    int colSpan;
    std::string exceptionStr;
    App::CellAddress anchor;
};

}

#endif // CELL_H
