xlnt/include/xlnt/styles/color.hpp

// Copyright (c) 2015 Thomas Fussell
// Copyright (c) 2010-2015 openpyxl
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, WRISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE
//
// @license: http://www.opensource.org/licenses/mit-license.php
// @author: see AUTHORS file
#pragma once

#include <string>

#include <xlnt/common/hash_combine.hpp>

namespace xlnt {

class color
{
public:
    enum class type
    {
        indexed,
        theme,
        auto_,
        rgb
    };
    
    static const color black;
    static const color white;
    static const color red;
    static const color darkred;
    static const color blue;
    static const color darkblue;
    static const color green;
    static const color darkgreen;
    static const color yellow;
    static const color darkyellow;
    
    color() {}
    
    color(type t, std::size_t v) : type_(t), index_(v)
    {
    }
    
    color(type t, const std::string &v) : type_(t), rgb_string_(v)
    {
    }
    
    void set_auto(int auto_index)
    {
        type_ = type::auto_;
        index_ = auto_index;
    }
    
    void set_index(int index)
    {
        type_ = type::indexed;
        index_ = index;
    }
    
    void set_theme(int theme)
    {
        type_ = type::theme;
        index_ = theme;
    }
    
    type get_type() const
    {
        return type_;
    }
    
    int get_auto() const
    {
        if(type_ != type::auto_)
        {
            throw std::runtime_error("not auto color");
        }
        
        return index_;
    }
    
    int get_index() const
    {
        if(type_ != type::indexed)
        {
            throw std::runtime_error("not indexed color");
        }
        
        return index_;
    }
    
    int get_theme() const
    {
        if(type_ != type::theme)
        {
            throw std::runtime_error("not theme color");
        }
        
        return index_;
    }
    
    std::string get_rgb_string() const
    {
        if(type_ != type::rgb)
        {
            throw std::runtime_error("not theme color");
        }
        
        return rgb_string_;
    }
    
    std::size_t hash() const
    {
        auto seed = static_cast<std::size_t>(type_);
        
        if(type_ != type::rgb)
        {
            hash_combine(seed, index_);
        }
        else
        {
            hash_combine(seed, rgb_string_);
        }
        
        return seed;
    }
    
    bool operator==(const color &other) const
    {
        return hash() == other.hash();
    }
    
private:
    type type_ = type::indexed;
    int index_ = 0;
    std::string rgb_string_;
};

} // namespace xlnt