enums.h

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Authors:
 *   Nicholas Bishop <nicholasbishop@gmail.com>
 *   Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
 *
 * Copyright (C) 2007 Authors
 *
 * Released under GNU GPL v2+, read the file 'COPYING' for more information.
 */
#ifndef INKSCAPE_UTIL_ENUMS_H
#define INKSCAPE_UTIL_ENUMS_H
 
#include <type_traits>
#include <glibmm/ustring.h>
 
namespace Inkscape::Util {
 
template<typename E>
struct EnumData
{
    E id;
    const Glib::ustring label;
    const Glib::ustring key;
};
 
const Glib::ustring empty_string("");
 
template<typename E> class EnumDataConverter
{
public:
    typedef EnumData<E> Data;
 
    EnumDataConverter(const EnumData<E>* cd, const unsigned int length)
        : _length(length), _data(cd)
    {}
 
    E get_id_from_label(const Glib::ustring& label) const
    {
        for(unsigned int i = 0; i < _length; ++i) {
            if(_data[i].label == label)
                return _data[i].id;
        }
 
        return (E)0;
    }
 
    E get_id_from_key(const Glib::ustring& key) const
    {
        for(unsigned int i = 0; i < _length; ++i) {
            if(_data[i].key == key)
                return _data[i].id;
        }
 
        return (E)0;
    }
 
    bool is_valid_key(const Glib::ustring& key) const
    {
        for(unsigned int i = 0; i < _length; ++i) {
            if(_data[i].key == key)
                return true;
        }
 
        return false;
    }
 
    bool is_valid_id(const E id) const
    {
        for(unsigned int i = 0; i < _length; ++i) {
            if(_data[i].id == id)
                return true;
        }
        return false;
    }
 
    const Glib::ustring& get_label(const E id) const
    {
        for(unsigned int i = 0; i < _length; ++i) {
            if(_data[i].id == id)
                return _data[i].label;
        }
 
        return empty_string;
    }
 
    const Glib::ustring& get_key(const E id) const
    {
        for(unsigned int i = 0; i < _length; ++i) {
            if(_data[i].id == id)
                return _data[i].key;
        }
 
        return empty_string;
    }
 
    const EnumData<E>& data(const unsigned int i) const
    {
        return _data[i];
    }
 
    const unsigned int _length;
private:
    const EnumData<E>* _data;
};
 
template <typename T>
requires std::is_enum_v<T>
constexpr bool any_flag(T test)
{
    return test != T{};
}
 
template <typename T>
requires std::is_enum_v<T>
constexpr bool has_flag(T test, T flag)
{
    return any_flag(test & flag);
}
 
} // namespace Inkscape::Util
 
#endif // INKSCAPE_UTIL_ENUMS_H
 
/*
  Local Variables:
  mode:c++
  c-file-style:"stroustrup"
  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
  indent-tabs-mode:nil
  fill-column:99
  End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :