✨ Rename Portal to Teleporter, new Sender tile [WIP]

stackline/build.rs

@@ -91,10 +91,30 @@ fn main() {
     res += "#[enum_dispatch]\n";
     res += "pub enum AnyTile {\n";
 
-    for name in names {
+    for name in names.iter() {
         res += &format!("    {0}({0}),\n", name);
     }
     res += "}\n";
 
+    // impl<T: Tile> TryInto<&T> for &AnyTile
+    res += "\n";
+
+    for name in names {
+        res += &format!(
+            concat!(
+                "impl<'a> TryInto<&'a {0}> for &'a AnyTile {{\n",
+                "    type Error = ();\n",
+                "    fn try_into(self) -> Result<&'a {0}, Self::Error> {{\n",
+                "        match self {{\n",
+                "            AnyTile::{0}(tile) => Ok(tile),\n",
+                "            _ => Err(()),\n",
+                "        }}\n",
+                "    }}\n",
+                "}}\n",
+            ),
+            name
+        );
+    }
+
     fs::write(dest_path.clone(), &res).expect(&format!("Couldn't write to {:?}", dest_path));
 }

stackline/src/lib.rs

@@ -7,6 +7,8 @@ This library is the rust implementation of the core logic of the language.
 
 */
 
+#![feature(drain_filter)]
+
 #[macro_use]
 extern crate contracts;
 

stackline/src/pane.rs

@@ -7,6 +7,8 @@ pub struct Pane {
     width: NonZeroUsize,
     height: NonZeroUsize,
 
+    position: (i32, i32),
+
     pub(crate) signals: Vec<(usize, usize)>,
 }
 
@@ -49,6 +51,8 @@ impl Pane {
             height: height.try_into().ok()?,
             tiles,
 
+            position: (0, 0),
+
             signals: Vec::new(),
         })
     }
@@ -83,6 +87,19 @@ impl Pane {
         self.height
     }
 
+    /// Returns the position of the `Pane` in its [`World`].
+    /// This property is used for drawing the `Pane` and calculating the distances between cross-pane tiles.
+    #[inline]
+    pub fn position(&self) -> (i32, i32) {
+        self.position
+    }
+
+    /// Sets the position of the `Pane` in its [`World`].
+    #[inline]
+    pub fn set_position(&mut self, position: (i32, i32)) {
+        self.position = position;
+    }
+
     /// Given a `position = (x, y)` and an `offset = (Δx, Δy)`,
     /// returns `Some((x + Δx, y + Δy))` if `(x + Δx, y + Δy)` is inside the `Pane`.
     ///
@@ -378,10 +395,12 @@ impl Pane {
             .filter_map(move |(i, v)| Some((i % self.width, i / self.width, v)))
     }
 
+    /// Draws the Pane at `(dx + self.position.0, dy + self.position.1)` on a [`TextSurface`].
+    /// Empty tiles will leave the `TextSurface` untouched, but tiles are free to modify the characters around them.
     pub fn draw(&self, dx: isize, dy: isize, surface: &mut TextSurface) {
         for (x, y, tile) in self.tiles() {
-            let x = x as isize + dx;
-            let y = y as isize + dy;
+            let x = x as isize + dx + self.position.0 as isize;
+            let y = y as isize + dy + self.position.1 as isize;
 
             if x >= 0 && y >= 0 {
                 tile.draw(x as usize, y as usize, surface);
@@ -468,4 +487,38 @@ mod test {
             }
         }
     }
+
+    #[test]
+    fn test_pane_draw_offset() {
+        use crate::tile::Wire;
+        use Orientation::*;
+
+        let mut pane = test_tile_setup!(
+            2,
+            2,
+            [
+                Wire::new(Horizontal),
+                Wire::new(Vertical),
+                Wire::new(Any),
+                ()
+            ]
+        );
+
+        pane.set_position((2, 1));
+
+        let mut surface = TextSurface::new(9, 9);
+
+        pane.draw(5, 3, &mut surface);
+
+        assert_eq!(surface.get(5 + 2, 3 + 1).unwrap().ch, '-');
+        assert_eq!(surface.get(5 + 3, 3 + 1).unwrap().ch, '|');
+        assert_eq!(surface.get(5 + 2, 3 + 2).unwrap().ch, '+');
+        for y in 0..9 {
+            for x in 0..9 {
+                if (x, y) != (5 + 2, 3 + 1) && (x, y) != (5 + 3, 3 + 1) && (x, y) != (5 + 2, 3 + 2) {
+                    assert_eq!(surface.get(x, y), Some(TextChar::default()));
+                }
+            }
+        }
+    }
 }

stackline/src/tile/full.rs

@@ -117,3 +117,6 @@ impl From<()> for FullTile {
         Self::new(None)
     }
 }
+
+// TODO: enum for <AnyTile as TryInto<T: Tile>>
+// TODO: local trait for conversion to inner tiles

stackline/tiles/transmit.rs

@@ -4,19 +4,19 @@ use crate::prelude::*;
 
 /// Instantly sends any incomming signals to `coordinates`
 #[derive(Clone, Debug)]
-pub struct Portal {
+pub struct Teleporter {
     pub coordinates: (String, usize, usize),
 }
 
-impl Portal {
+impl Teleporter {
     pub fn new(name: String, x: usize, y: usize) -> Self {
         Self {
-            coordinates: (name, x, y)
+            coordinates: (name, x, y),
         }
     }
 }
 
-impl Tile for Portal {
+impl Tile for Teleporter {
     fn update<'b>(&'b mut self, mut context: UpdateContext<'b>) {
         if let Some(signal) = context.take_signal() {
             context.send_outbound(self.coordinates.clone(), signal);
@@ -32,12 +32,115 @@ impl Tile for Portal {
     }
 }
 
+/// Sends a signal through a virtual wire towards `coordinates`.
+#[derive(Clone, Debug)]
+pub struct Sender {
+    pub coordinates: (String, usize, usize),
+    pub path: Vec<(i32, i32)>, // x, y
+    pub length: usize,
+    pub signals: Vec<(Signal, usize)>,
+}
+
+impl Sender {
+    pub fn new(name: String, x: usize, y: usize) -> Self {
+        Self {
+            coordinates: (name, x, y),
+            path: Vec::new(),
+            length: 0,
+            signals: Vec::new(),
+        }
+    }
+
+    // TODO: implement WorldMask, calculate_path and a method of Tile to call this method automatically
+    // pub fn calculate_path(&mut self, mask: &WorldMask) {
+    //
+    // }
+}
+
+impl Tile for Sender {
+    fn update<'b>(&'b mut self, mut context: UpdateContext<'b>) {
+        let mut needs_sending = false;
+
+        for (_signal, ref mut time) in self.signals.iter_mut() {
+            *time += 1;
+
+            if *time >= self.length {
+                needs_sending = true;
+            }
+        }
+
+        if let Some(signal) = context.take_signal() {
+            self.signals.push((signal, 0));
+            if self.length == 0 {
+                needs_sending = true;
+            }
+        }
+
+        if needs_sending {
+            for (signal, _time) in self.signals.drain_filter(|(_, time)| *time >= self.length) {
+                context.send_outbound(self.coordinates.clone(), signal);
+            }
+        }
+
+        if context.state() == State::Active {
+            context.next_state();
+        } else if context.state() == State::Dormant && self.signals.len() == 0 {
+            context.next_state();
+        }
+    }
+
+    // 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) {
+        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 { '<' };
+                surface.set(
+                    (x as i32 + prev.0) as usize,
+                    (y as i32 + prev.1) as usize,
+                    TextChar::from_state(ch, State::Idle),
+                );
+
+                // Draw the horizontal line
+
+                for dx in (prev.0 + 1)..(next.0) {
+                    surface.set(
+                        (x as i32 + dx) as usize,
+                        (y as i32 + prev.1) as usize,
+                        TextChar::from_state('-', State::Idle),
+                    );
+                }
+            } else {
+                // Draw the diode of the corner
+                let ch = if next.1 > prev.1 { 'v' } else { '^' };
+                surface.set(
+                    (x as i32 + prev.0) as usize,
+                    (y as i32 + prev.1) as usize,
+                    TextChar::from_state(ch, State::Idle),
+                );
+
+                // Draw the vertical line
+
+                for dy in (prev.1 + 1)..(next.1) {
+                    surface.set(
+                        (y as i32 + prev.0) as usize,
+                        (y as i32 + dy) as usize,
+                        TextChar::from_state('|', State::Idle),
+                    );
+                }
+            }
+        }
+    }
+}
+
 #[cfg(test)]
 mod test {
     use super::*;
+    use veccell::VecRef;
 
     #[test]
-    fn test_portal_transmit_same_pane() {
+    fn test_teleporter_transmit_same_pane() {
         use crate::{Diode, Wire};
         use Direction::*;
         use Orientation::*;
@@ -46,9 +149,15 @@ mod test {
             3,
             3,
             [
-                Diode::new(Right), Portal::new(String::from("main"), 2, 2), (),
-                (), (), (),
-                (), (), Wire::new(Any)
+                Diode::new(Right),
+                Teleporter::new(String::from("main"), 2, 2),
+                (),
+                (),
+                (),
+                (),
+                (),
+                (),
+                Wire::new(Any)
             ]
         );
 
@@ -74,7 +183,7 @@ mod test {
     }
 
     #[test]
-    fn test_portal_transmit_other_pane() {
+    fn test_teleporter_transmit_other_pane() {
         use crate::{Diode, Wire};
         use Direction::*;
         use Orientation::*;
@@ -83,19 +192,14 @@ mod test {
             2,
             1,
             [
-                Diode::new(Right), Portal::new(String::from("sub"), 0, 0),
+                Diode::new(Right),
+                Teleporter::new(String::from("sub"), 0, 0),
             ]
         );
 
         test_set_signal!(main_pane, (0, 0), Right);
 
-        let sub_pane = test_tile_setup!(
-            1,
-            1,
-            [
-                Wire::new(Any),
-            ]
-        );
+        let sub_pane = test_tile_setup!(1, 1, [Wire::new(Any),]);
 
         let mut world = World::new();
         world.set_pane(String::from("main"), main_pane);
@@ -118,15 +222,33 @@ mod test {
     }
 
     #[test]
-    fn test_portal_transmit_self() {
+    fn test_teleporter_transmit_self() {
         use Direction::*;
 
+        let mut main_pane = test_tile_setup!(1, 1, [Teleporter::new(String::from("main"), 0, 0),]);
+
+        test_set_signal!(main_pane, (0, 0), Right);
+
+        let mut world = World::new();
+        world.set_pane(String::from("main"), main_pane);
+
+        for _ in 0..5 {
+            world.step();
+
+            assert_signal!(world.get_pane("main").unwrap(), (0, 0));
+        }
+    }
+
+    #[test]
+    fn test_sender_instantaneous() {
+        use crate::Wire;
+        use Direction::*;
+        use Orientation::*;
+
         let mut main_pane = test_tile_setup!(
             1,
-            1,
-            [
-                Portal::new(String::from("main"), 0, 0),
-            ]
+            3,
+            [Sender::new(String::from("main"), 0, 2), (), Wire::new(Any)]
         );
 
         test_set_signal!(main_pane, (0, 0), Right);
@@ -134,10 +256,55 @@ mod test {
         let mut world = World::new();
         world.set_pane(String::from("main"), main_pane);
 
-        for _ in 0..5 {
         world.step();
 
-            assert_signal!(world.get_pane("main").unwrap(), (0, 0));
+        assert_signal!(world.get_pane("main").unwrap(), (0, 2));
+    }
+
+    #[test]
+    fn test_sender_delay() {
+        use crate::Wire;
+        use Direction::*;
+        use Orientation::*;
+
+        let mut sender = Sender::new(String::from("main"), 0, 2);
+        sender.length = 2;
+
+        let mut main_pane = test_tile_setup!(1, 3, [sender, (), Wire::new(Any)]);
+
+        test_set_signal!(main_pane, (0, 0), Right);
+
+        let mut world = World::new();
+        world.set_pane(String::from("main"), main_pane);
+
+        for n in 0..2 {
+            world.step();
+
+            // TODO: pane.get_as::<Sender>(coords)
+            let sender: VecRef<'_, Sender> = VecRef::map(
+                world.get_pane("main").unwrap().get((0, 0)).unwrap(),
+                |tile| tile.get().unwrap().try_into().unwrap(),
+            );
+
+            assert!(sender.signals.len() == 1);
+            assert!(sender.signals[0].1 == n);
+
+            drop(sender);
+
+            assert_no_signal!(world.get_pane("main").unwrap(), (0, 0));
+            assert_no_signal!(world.get_pane("main").unwrap(), (0, 2));
         }
+
+        world.step();
+
+        let sender: VecRef<'_, Sender> = VecRef::map(
+            world.get_pane("main").unwrap().get((0, 0)).unwrap(),
+            |tile| tile.get().unwrap().try_into().unwrap(),
+        );
+
+        assert!(sender.signals.len() == 0);
+
+        assert_no_signal!(world.get_pane("main").unwrap(), (0, 0));
+        assert_signal!(world.get_pane("main").unwrap(), (0, 2));
     }
 }