// libvle -- library for building Vim-like applications
// Copyright (C) 2019 xaizek <xaizek@posteo.net>
//
// This file is part of libvle.
//
// libvle 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 3 of the License, or
// (at your option) any later version.
//
// libvle 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 libvle.  If not, see <https://www.gnu.org/licenses/>.

#include "keys.hpp"

#include <stdexcept>
#include <string>

using namespace vle;

Key::Key(wchar_t key) : key(key)
{
    if (key == L'\0') {
        throw std::invalid_argument("Key can't be L'\\0'");
    }
}

Key &
Key::ctrl()
{
    if ((key >= L'a' && key <= L'z') || (key >= L'A' && key <= L'Z') ||
        key == L'[' || key == L'\\' || key == L']' ||
        key == L'^' || key == L'_') {
        key &= 0x1f;
        return *this;
    }

    throw std::logic_error("Can't apply control modifier to a key with value " +
                           std::to_string(key));
}

Key::operator std::wstring() const
{
    return std::wstring(1, key);
}