tek/tui/src/tui_style.rs

use crate::*;

pub trait TuiStyle {
    fn fg <R: Content<TuiOut>> (color: Color, w: R) -> Foreground<R> {
        Foreground(color, w)
    }
    fn bg <R: Content<TuiOut>> (color: Color, w: R) -> Background<R> {
        Background(color, w)
    }
    fn fg_bg <R: Content<TuiOut>> (fg: Color, bg: Color, w: R) -> Background<Foreground<R>> {
        Background(bg, Foreground(fg, w))
    }
    fn bold <R: Content<TuiOut>> (on: bool, w: R) -> Bold<R> {
        Bold(on, w)
    }
    fn border <R: Content<TuiOut>, S: BorderStyle> (style: S, w: R) -> Bordered<S, R> {
        Bordered(style, w)
    }
}

impl TuiStyle for Tui {}

pub struct Bold<R: Content<TuiOut>>(pub bool, R);
impl<R: Content<TuiOut>> Content<TuiOut> for Bold<R> {
    fn content (&self) -> impl Render<TuiOut> { &self.1 }
    fn render (&self, to: &mut TuiOut) {
        to.fill_bold(to.area(), self.0);
        self.1.render(to)
    }
}

pub struct Foreground<R: Content<TuiOut>>(pub Color, R);
impl<R: Content<TuiOut>> Content<TuiOut> for Foreground<R> {
    fn content (&self) -> impl Render<TuiOut> { &self.1 }
    fn render (&self, to: &mut TuiOut) {
        to.fill_fg(to.area(), self.0);
        self.1.render(to)
    }
}

pub struct Background<R: Content<TuiOut>>(pub Color, R);
impl<R: Content<TuiOut>> Content<TuiOut> for Background<R> {
    fn content (&self) -> impl Render<TuiOut> { &self.1 }
    fn render (&self, to: &mut TuiOut) {
        to.fill_bg(to.area(), self.0);
        self.1.render(to)
    }
}

pub struct Styled<R: Content<TuiOut>>(pub Option<Style>, pub R);
impl<R: Content<TuiOut>> Content<TuiOut> for Styled<R> {
    fn content (&self) -> impl Render<TuiOut> { &self.1 }
    fn render (&self, to: &mut TuiOut) {
        to.place(self.content().layout(to.area()), &self.content());
        // TODO write style over area
    }
}

//pub trait TuiStyle: Render<TuiOut> + Sized {
    //fn fg (self, color: Color) -> impl Render<TuiOut> {
        //Layers::new(move |add|{ add(&Foreground(color))?; add(&self) })
    //}
    //fn bg (self, color: Color) -> impl Render<TuiOut> {
        //Layers::new(move |add|{ add(&Background(color))?; add(&self) })
    //}
    //fn bold (self, on: bool) -> impl Render<TuiOut> {
        //Layers::new(move |add|{ add(&Bold(on))?; add(&self) })
    //}
    //fn border <S: BorderStyle> (self, style: S) -> impl Render<TuiOut> {
        //Bordered(style, self)
    //}
//}

//impl<R: Content<TuiOut>> TuiStyle for R {}

//impl<S: BorderStyle> Content<TuiOut> for Border<S> {
//}

//impl<S: BorderStyle, R: Content<TuiOut>> Content<TuiOut> for Bordered<S, R> {
    //fn content (&self) -> impl Render<TuiOut> {
        //let content: &dyn Content<TuiOut> = &self.1;
        //lay! { content.padding_xy(1, 1), Border(self.0) }.fill_xy()
    //}
//}