rnk-style-core 0.1.0

//! Border styles shared across rnk crates.

/// Border style
#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
pub enum BorderStyle {
    #[default]
    None,
    Single,
    Double,
    Round,
    Bold,
    SingleDouble,
    DoubleSingle,
    Classic,
}

impl BorderStyle {
    /// Get border characters: (top_left, top_right, bottom_left, bottom_right, horizontal, vertical)
    pub fn chars(
        &self,
    ) -> (
        &'static str,
        &'static str,
        &'static str,
        &'static str,
        &'static str,
        &'static str,
    ) {
        match self {
            BorderStyle::None => (" ", " ", " ", " ", " ", " "),
            BorderStyle::Single => ("┌", "┐", "└", "┘", "─", "│"),
            BorderStyle::Double => ("╔", "╗", "╚", "╝", "═", "║"),
            BorderStyle::Round => ("╭", "╮", "╰", "╯", "─", "│"),
            BorderStyle::Bold => ("┏", "┓", "┗", "┛", "━", "┃"),
            BorderStyle::SingleDouble => ("╓", "╖", "╙", "╜", "─", "║"),
            BorderStyle::DoubleSingle => ("╒", "╕", "╘", "╛", "═", "│"),
            BorderStyle::Classic => ("+", "+", "+", "+", "-", "|"),
        }
    }

    /// Check if border is visible
    pub fn is_visible(&self) -> bool {
        !matches!(self, BorderStyle::None)
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_border_chars() {
        let (tl, tr, bl, br, h, v) = BorderStyle::Round.chars();
        assert_eq!(tl, "╭");
        assert_eq!(tr, "╮");
        assert_eq!(bl, "╰");
        assert_eq!(br, "╯");
        assert_eq!(h, "─");
        assert_eq!(v, "│");
    }

    #[test]
    fn test_is_visible() {
        assert!(!BorderStyle::None.is_visible());
        assert!(BorderStyle::Single.is_visible());
        assert!(BorderStyle::Round.is_visible());
    }
}