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use std::fmt;

// XXX: universal? pane-size, display-popup
#[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug)]
pub enum PaneSize {
    // XXX: PaneSize:Size?
    Size(usize),
    Percentage(usize),
}

// XXX: size? similar struct XxY, rect, mb rename
#[cfg(feature = "tmux_3_2")]
#[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug)]
pub enum Size {
    // XXX: Size:Size?
    Size(usize),
    Percentage(usize),
}

#[cfg(feature = "tmux_3_2")]
impl fmt::Display for Size {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        let s = match self {
            Size::Size(size) => size.to_string(),
            Size::Percentage(size) => {
                format!("{}%", size)
            }
        };

        write!(f, "{}", s)
    }
}

// XXX: check, need to pass flag -p, -l anyway
// affected commands:
// split_window
// move_pane
// join_pane
//
impl fmt::Display for PaneSize {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        // `[-l size]` - specify the size of the new pane in lines
        // `[-l size | -p percentage]` - specify the size of the new pane in lines
        #[cfg(all(feature = "tmux_0_8", not(feature = "tmux_3_1")))]
        let s = match self {
            PaneSize::Size(size) => size.to_string(),
            PaneSize::Percentage(size) => {
                format!("{}%", size)
            }
        };

        #[cfg(feature = "tmux_3_1")]
        let s = match self {
            PaneSize::Size(size) => size.to_string(),
            PaneSize::Percentage(size) => size.to_string(),
        };

        write!(f, "{}", s)
    }
}