/*
 * meli
 *
 * Copyright 2017-2018 Manos Pitsidianakis
 *
 * This file is part of meli.
 *
 * meli 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.
 *
 * meli 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 meli. If not, see <http://www.gnu.org/licenses/>.
 */

//! Simple type definitions and macro helper for a `(x, y)` position on the
//! terminal and the areas they define. An [`Area`] consists of two points: the
//! upper left and bottom right corners.

/// A `(x, y)` position on screen.
pub type Pos = (usize, usize);

#[inline(always)]
pub fn get_x(p: Pos) -> usize {
    p.0
}
#[inline(always)]
pub fn get_y(p: Pos) -> usize {
    p.1
}
#[inline(always)]
pub fn set_x(p: Pos, new_x: usize) -> Pos {
    (new_x, p.1)
}
#[inline(always)]
pub fn set_y(p: Pos, new_y: usize) -> Pos {
    (p.0, new_y)
}
#[inline(always)]
pub fn pos_inc(p: Pos, inc: (usize, usize)) -> Pos {
    (p.0 + inc.0, p.1 + inc.1)
}

#[inline(always)]
pub fn pos_dec(p: Pos, dec: (usize, usize)) -> Pos {
    (p.0.saturating_sub(dec.0), p.1.saturating_sub(dec.1))
}

#[derive(Debug, Copy, Clone, PartialEq, Eq, Default)]
pub enum Alignment {
    /// Stretch to fill all space if possible, center if no meaningful way to
    /// stretch.
    Fill,
    /// Snap to left or top side, leaving space on right or bottom.
    Start,
    /// Snap to right or bottom side, leaving space on left or top.
    End,
    /// Center natural width of widget inside the allocation.
    #[default]
    Center,
}