flatten workspace into 1 crate

src/space/measure.rs

@@ -0,0 +1,93 @@
+use crate::*;
+
+pub trait HasSize<E: Engine> {
+    fn size (&self) -> &Measure<E>;
+}
+
+#[macro_export] macro_rules! has_size {
+    (<$E:ty>|$self:ident:$Struct:ident$(<$($L:lifetime),*$($T:ident$(:$U:path)?),*>)?|$cb:expr) => {
+        impl $(<$($L),*$($T $(: $U)?),*>)? HasSize<$E> for $Struct $(<$($L),*$($T),*>)? {
+            fn size (&$self) -> &Measure<$E> { $cb }
+        }
+    }
+}
+
+impl<E: Engine> LayoutDebug<E> for E {}
+
+pub trait LayoutDebug<E: Engine> {
+    fn debug <W: Render<E>> (other: W) -> DebugOverlay<E, W> {
+        DebugOverlay(Default::default(), other)
+    }
+}
+
+pub struct DebugOverlay<E: Engine, W: Render<E>>(PhantomData<E>, pub W);
+
+/// A widget that tracks its render width and height
+#[derive(Default)]
+pub struct Measure<E: Engine> {
+    _engine: PhantomData<E>,
+    pub x: Arc<AtomicUsize>,
+    pub y: Arc<AtomicUsize>,
+}
+
+impl<E: Engine> Clone for Measure<E> {
+    fn clone (&self) -> Self {
+        Self {
+            _engine: Default::default(),
+            x: self.x.clone(),
+            y: self.y.clone(),
+        }
+    }
+}
+
+impl<E: Engine> std::fmt::Debug for Measure<E> {
+    fn fmt (&self, f: &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error> {
+        f.debug_struct("Measure")
+            .field("width",  &self.x)
+            .field("height", &self.y)
+            .finish()
+    }
+}
+
+impl<E: Engine> Measure<E> {
+    pub fn w (&self) -> usize { self.x.load(Relaxed) }
+    pub fn h (&self) -> usize { self.y.load(Relaxed) }
+    pub fn wh (&self) -> [usize;2] { [self.w(), self.h()] }
+    pub fn set_w (&self, w: impl Into<usize>) { self.x.store(w.into(), Relaxed) }
+    pub fn set_h (&self, h: impl Into<usize>) { self.y.store(h.into(), Relaxed) }
+    pub fn set_wh (&self, w: impl Into<usize>, h: impl Into<usize>) { self.set_w(w); self.set_h(h); }
+    pub fn format (&self) -> String { format!("{}x{}", self.w(), self.h()) }
+    pub fn new () -> Self {
+        Self {
+            _engine: PhantomData::default(),
+            x: Arc::new(0.into()),
+            y: Arc::new(0.into()),
+        }
+    }
+}
+
+impl Render<Tui> for Measure<Tui> {
+    fn min_size (&self, _: [u16;2]) -> Perhaps<[u16;2]> {
+        Ok(Some([0u16.into(), 0u16.into()].into()))
+    }
+    fn render (&self, to: &mut TuiOutput) -> Usually<()> {
+        self.set_w(to.area().w());
+        self.set_h(to.area().h());
+        Ok(())
+    }
+}
+
+impl Measure<Tui> {
+    pub fn debug (&self) -> ShowMeasure {
+        ShowMeasure(&self)
+    }
+}
+
+pub struct ShowMeasure<'a>(&'a Measure<Tui>);
+render!(<Tui>|self: ShowMeasure<'a>|render(|to|Ok({
+    let w = self.0.w();
+    let h = self.0.h();
+    to.blit(&format!(" {w} x {h} "), to.area.x(), to.area.y(), Some(
+        Style::default().bold().italic().bg(Color::Rgb(255, 0, 255)).fg(Color::Rgb(0,0,0))
+    ))
+})));