bernardo-tui 0.2.7

use serde::{Deserialize, Serialize};

use crate::io::style::{TextStyle, TEXT_STYLE_WHITE_ON_BLACK};

#[derive(Debug, Clone, Eq, PartialEq, Serialize, Deserialize)]
pub enum Cell {
    Begin { style: TextStyle, grapheme: String },
    Continuation,
}

impl Cell {
    pub fn new(style: TextStyle, grapheme: String) -> Cell {
        Cell::Begin { style, grapheme }
    }

    pub fn continuation() -> Cell {
        Cell::Continuation
    }

    pub fn style(&self) -> Option<&TextStyle> {
        match self {
            Cell::Begin { style, grapheme: _ } => Some(style),
            Cell::Continuation => None,
        }
    }

    pub fn grapheme(&self) -> Option<&str> {
        match self {
            Cell::Begin { style: _, grapheme } => Some(grapheme),
            Cell::Continuation => None,
        }
    }

    // TODO dirty workaround, probably I'd like the Cell to impl Copy
    pub fn set(&mut self, other: &Self) {
        match other {
            Cell::Begin { style, grapheme } => {
                *self = Cell::Begin {
                    style: *style,
                    grapheme: grapheme.clone(),
                }
            }
            Cell::Continuation => {
                *self = Cell::Continuation;
            }
        }
    }
}

impl Default for Cell {
    fn default() -> Self {
        Cell::Begin {
            style: TEXT_STYLE_WHITE_ON_BLACK,
            grapheme: ' '.into(),
        }
    }
}