✨ 🔥 Tile::draw accepts i32, Tile::draw_simple

stackline/src/pane.rs

@@ -514,9 +514,7 @@ impl Pane {
             let x = x as i32 + dx + self.position.0 as i32;
             let y = y as i32 + dy + self.position.1 as i32;
 
-            if x >= 0 && y >= 0 {
-                tile.draw(x as usize, y as usize, surface);
-            }
+            tile.draw(x, y, surface);
         }
     }
 }

stackline/src/text.rs

@@ -65,6 +65,7 @@ pub struct TextSurface {
 
 impl TextSurface {
     pub fn new(width: usize, height: usize) -> Self {
+        // TODO: return None if width or height don't fit in an i32
         Self {
             width,
             height,

stackline/src/tile/full.rs

@@ -88,7 +88,7 @@ impl FullTile {
 
     /// Draws itself on a [`TextSurface`] at `(x, y)`.
     /// If the tile is empty, does nothing
-    pub fn draw(&self, x: usize, y: usize, surface: &mut TextSurface) {
+    pub fn draw(&self, x: i32, y: i32, surface: &mut TextSurface) {
         match self.cell {
             Some(ref cell) => cell.draw(x, y, self.state, surface),
             None => {}

stackline/src/tile/mod.rs

@@ -156,51 +156,24 @@ pub trait Tile: std::clone::Clone + std::fmt::Debug + Serialize + for<'d> Deseri
 
     /// Should draw itself on a [`TextSurface`].
     /// The `Tile` is allowed to draw outside of its coordinates, although doing so might cause glitches.
+    ///
+    /// By default, draws a single character at the tile's location, determined by [`Tile::draw_simple`]
     // TODO: Use a 2d slice type
     #[inline]
     #[allow(unused_variables)]
-    fn draw(&self, x: usize, y: usize, state: State, surface: &mut TextSurface) {
-        // noop
+    fn draw(&self, x: i32, y: i32, state: State, surface: &mut TextSurface) {
+        if let (Ok(x), Ok(y)) = (x.try_into(), y.try_into()) {
+            surface.set(x, y, self.draw_simple(state));
         }
     }
 
-// #[derive(Debug)]
-// pub struct AnyTile(Box<dyn Tile>);
-
-// impl AnyTile {
-//     #[inline]
-//     pub fn new<T: Tile + 'static>(tile: T) -> Self {
-//         Self(Box::new(tile))
-//     }
-
-//     #[inline]
-//     pub fn update<'b>(&'b mut self, ctx: UpdateContext<'b>) {
-//         self.0.update(ctx)
-//     }
-
-//     #[inline]
-//     pub fn accepts_signal(&self, direction: Direction) -> bool {
-//         self.0.accepts_signal(direction)
-//     }
-
-//     #[inline]
-//     pub fn draw(&self, x: usize, y: usize, state: State, surface: &mut TextSurface) {
-//         self.0.draw(x, y, state, surface);
-//     }
-// }
-
-// impl Clone for AnyTile {
-//     #[inline]
-//     fn clone(&self) -> Self {
-//         Self(clone_box(self.0.as_ref()))
-//     }
-// }
-
-// impl<T: Tile + 'static> From<T> for AnyTile {
-//     fn from(tile: T) -> AnyTile {
-//         AnyTile(Box::new(tile))
-//     }
-// }
+    /// Used by the default implementation of `draw`,
+    #[inline]
+    #[allow(unused_variables)]
+    fn draw_simple(&self, state: State) -> TextChar {
+        TextChar::default()
+    }
+}
 
 pub mod prelude {
     pub use crate::prelude::*;

stackline/tests/wire.rs

@@ -25,3 +25,14 @@ fn test_diode_loop() {
     run!(world, 4);
     assert_signal!(world, 1, 1);
 }
+
+#[test]
+fn test_display_oob() {
+    let world = load_test!("tests/wire/diode-loop.json");
+
+    println!("{}", world);
+
+    let mut surface = TextSurface::new(0, 0);
+    world.draw(0, 0, &mut surface);
+    world.draw(-1000, -1000, &mut surface);
+}

stackline/tiles/transmit.rs

@@ -28,8 +28,8 @@ impl Tile for Teleporter {
         }
     }
 
-    fn draw(&self, x: usize, y: usize, state: State, surface: &mut TextSurface) {
-        surface.set(x, y, TextChar::from_state('P', state));
+    fn draw_simple(&self, state: State) -> TextChar {
+        TextChar::from_state('P', state)
     }
 }
 
@@ -166,53 +166,71 @@ impl Tile for Sender {
 
     // TODO: read self.signals to determine the state of each char
     // TODO: automated test
-    fn draw(&self, x: usize, y: usize, _state: State, surface: &mut TextSurface) {
+    fn draw(&self, x: i32, y: i32, _state: State, surface: &mut TextSurface) {
         for (prev, next) in self.path.iter().zip(self.path.iter().skip(1)) {
             if prev.0 != next.0 {
                 // Draw the diode of the corner
                 let ch = if next.0 > prev.0 { '>' } else { '<' };
+                let x2 = x + prev.0;
+                let y2 = y + prev.1;
+
+                if x2 >= 0 && y2 >= 0 {
                     surface.set(
-                    (x as i32 + prev.0) as usize,
-                    (y as i32 + prev.1) as usize,
+                        x2 as usize,
+                        y2 as usize,
                         TextChar::from_state(ch, State::Idle),
                     );
+                }
 
                 // Draw the horizontal line
 
                 for dx in (prev.0 + 1)..(next.0) {
+                    let x2 = x + dx;
+                    let y2 = y + prev.1;
+                    if x2 >= 0 && y2 >= 0 {
                         surface.set(
-                        (x as i32 + dx) as usize,
-                        (y as i32 + prev.1) as usize,
+                            x2 as usize,
+                            y2 as usize,
                             TextChar::from_state('-', State::Idle),
                         );
                     }
+                }
             } else {
                 // Draw the diode of the corner
                 let ch = if next.1 > prev.1 { 'v' } else { '^' };
+                let x2 = x + prev.0;
+                let y2 = y + prev.1;
+
+                if x2 >= 0 && y2 >= 0 {
                     surface.set(
-                    (x as i32 + prev.0) as usize,
-                    (y as i32 + prev.1) as usize,
+                        x2 as usize,
+                        y2 as usize,
                         TextChar::from_state(ch, State::Idle),
                     );
+                }
 
                 // Draw the vertical line
 
                 for dy in (prev.1 + 1)..(next.1) {
+                    let x2 = x + prev.0;
+                    let y2 = y + dy;
+                    if x2 >= 0 && y2 >= 0 {
                         surface.set(
-                        (y as i32 + prev.0) as usize,
-                        (y as i32 + dy) as usize,
-                        TextChar::from_state('|', State::Idle),
+                            x2 as usize,
+                            y2 as usize,
+                            TextChar::from_state('-', State::Idle),
                         );
                     }
                 }
             }
         }
     }
+}
 
 #[cfg(test)]
 mod test {
     use super::*;
-    use veccell::{VecRef, VecRefMut};
+    use veccell::{VecRef};
 
     #[test]
     fn test_teleporter_transmit_same_pane() {

stackline/tiles/wire.rs

@@ -34,14 +34,14 @@ impl Tile for Wire {
         self.0.contains(direction)
     }
 
-    fn draw(&self, x: usize, y: usize, state: State, surface: &mut TextSurface) {
+    fn draw_simple(&self, state: State) -> TextChar {
         let ch = match self.0 {
             Orientation::Horizontal => '-',
             Orientation::Vertical => '|',
             Orientation::Any => '+',
         };
 
-        surface.set(x, y, TextChar::from_state(ch, state));
+        TextChar::from_state(ch, state)
     }
 }
 
@@ -76,7 +76,7 @@ impl Tile for Diode {
         direction.opposite() != self.0
     }
 
-    fn draw(&self, x: usize, y: usize, state: State, surface: &mut TextSurface) {
+    fn draw_simple(&self, state: State) -> TextChar {
         let ch = match self.0 {
             Direction::Up => '^',
             Direction::Down => 'v',
@@ -84,7 +84,7 @@ impl Tile for Diode {
             Direction::Right => '>',
         };
 
-        surface.set(x, y, TextChar::from_state(ch, state));
+        TextChar::from_state(ch, state)
     }
 }
 
@@ -121,7 +121,7 @@ impl Tile for Resistor {
         }
     }
 
-    fn draw(&self, x: usize, y: usize, state: State, surface: &mut TextSurface) {
+    fn draw_simple(&self, state: State) -> TextChar {
         let ch = match self.direction {
             Direction::Up => '\u{2191}',    // Upwards Arrow
             Direction::Down => '\u{2193}',  // Downwards Arrow
@@ -129,7 +129,7 @@ impl Tile for Resistor {
             Direction::Right => '\u{2192}', // Rightwards Arrow
         };
 
-        surface.set(x, y, TextChar::from_state(ch, state));
+        TextChar::from_state(ch, state)
     }
 }