wip: big flat pt.2: extract engine crate

src/style.rs

@@ -0,0 +1,96 @@
+use crate::*;
+
+impl Tui {
+    pub(crate) fn fg <W: Render<Tui>> (color: Color, w: W) -> Foreground<W> {
+        Foreground(color, w)
+    }
+    pub(crate) fn bg <W: Render<Tui>> (color: Color, w: W) -> Background<W> {
+        Background(color, w)
+    }
+    pub(crate) fn fg_bg <W: Render<Tui>> (fg: Color, bg: Color, w: W) -> Background<Foreground<W>> {
+        Background(bg, Foreground(fg, w))
+    }
+    pub(crate) fn bold <W: Render<Tui>> (on: bool, w: W) -> Bold<W> {
+        Bold(on, w)
+    }
+    pub(crate) fn border <W: Render<Tui>, S: BorderStyle> (style: S, w: W) -> Bordered<S, W> {
+        Bordered(style, w)
+    }
+}
+
+pub struct Bold<W: Render<Tui>>(pub bool, W);
+
+impl<W: Render<Tui>> Render<Tui> for Bold<W> {
+    fn min_size (&self, to: [u16;2]) -> Perhaps<[u16;2]> {
+        self.1.min_size(to)
+    }
+    fn render (&self, to: &mut TuiOutput) -> Usually<()> {
+        to.fill_bold(to.area(), self.0);
+        self.1.render(to)
+    }
+}
+
+pub struct Foreground<W: Render<Tui>>(pub Color, W);
+
+impl<W: Render<Tui>> Render<Tui> for Foreground<W> {
+    fn min_size (&self, to: [u16;2]) -> Perhaps<[u16;2]> {
+        self.1.min_size(to)
+    }
+    fn render (&self, to: &mut TuiOutput) -> Usually<()> {
+        to.fill_fg(to.area(), self.0);
+        self.1.render(to)
+    }
+}
+
+pub struct Background<W: Render<Tui>>(pub Color, W);
+
+impl<W: Render<Tui>> Render<Tui> for Background<W> {
+    fn min_size (&self, to: [u16;2]) -> Perhaps<[u16;2]> {
+        self.1.min_size(to)
+    }
+    fn render (&self, to: &mut TuiOutput) -> Usually<()> {
+        to.fill_bg(to.area(), self.0);
+        self.1.render(to)
+    }
+}
+
+pub struct Styled<T: Render<Tui>>(pub Option<Style>, pub T);
+
+impl Render<Tui> for Styled<&str> {
+    fn min_size (&self, _: [u16;2]) -> Perhaps<[u16;2]> {
+        Ok(Some([self.1.chars().count() as u16, 1]))
+    }
+    fn render (&self, to: &mut TuiOutput) -> Usually<()> {
+        // FIXME
+        let [x, y, ..] = to.area();
+        //let [w, h] = self.min_size(to.area().wh())?.unwrap();
+        Ok(to.blit(&self.1, x, y, None))
+    }
+}
+
+//pub trait TuiStyle: Render<Tui> + Sized {
+    //fn fg (self, color: Color) -> impl Render<Tui> {
+        //Layers::new(move |add|{ add(&Foreground(color))?; add(&self) })
+    //}
+    //fn bg (self, color: Color) -> impl Render<Tui> {
+        //Layers::new(move |add|{ add(&Background(color))?; add(&self) })
+    //}
+    //fn bold (self, on: bool) -> impl Render<Tui> {
+        //Layers::new(move |add|{ add(&Bold(on))?; add(&self) })
+    //}
+    //fn border <S: BorderStyle> (self, style: S) -> impl Render<Tui> {
+        //Bordered(style, self)
+    //}
+//}
+
+//impl<W: Render<Tui>> TuiStyle for W {}
+
+//impl<S: BorderStyle> Render<Tui> for Border<S> {
+//}
+
+//impl<S: BorderStyle, W: Render<Tui>> Content<Tui> for Bordered<S, W> {
+    //fn content (&self) -> impl Render<Tui> {
+        //let content: &dyn Render<Tui> = &self.1;
+        //lay! { content.padding_xy(1, 1), Border(self.0) }.fill_xy()
+    //}
+//}