split up sources into manageable files

src/elements/alu.typ

@@ -0,0 +1,84 @@
+#import "@preview/cetz:0.2.2": draw
+#import "element.typ"
+#import "ports.typ": add-port
+
+#let draw-shape(id, tl, tr, br, bl, fill, stroke) = {
+  let p0 = tl
+  let p1 = (tr, 10%, br)
+  let p2 = (tr, 90%, br)
+  let p3 = bl
+  let p4 = (tl, 55%, bl)
+  let p5 = (tl, 50%, br)
+  let p6 = (tl, 45%, bl)
+  
+  let f1 = draw.group(name: id, {
+    
+    draw.merge-path(
+      inset: 0.5em,
+      fill: fill,
+      stroke: stroke,
+      close: true,
+      draw.line(p0, p1, p2, p3, p4, p5, p6)
+    )
+    draw.anchor("north", (p0, 50%, p1))
+    draw.anchor("south", (p2, 50%, p3))
+    draw.anchor("west", (p0, 50%, p3))
+    draw.anchor("east", (p1, 50%, p2))
+  })
+
+  let f2 = add-port(id, "west", (id: "in1"), (p0, 50%, p6))
+  let f3 = add-port(id, "west", (id: "in2"), (p3, 50%, p4))
+  let f4 = add-port(id, "east", (id: "out"), (p1, 50%, p2))
+
+  let f = {
+    f1; f2; f3; f4
+  }
+
+  return (f, tl, tr, br, bl)
+}
+
+#let alu(
+  x: none,
+  y: none,
+  w: none,
+  h: none,
+  name: none,
+  name-anchor: "center",
+  fill: none,
+  stroke: black + 1pt,
+  id: "",
+  debug: (
+    grid: false,
+    ports: false
+  )
+) = {
+  let ports = (
+    west: (
+      (id: "in1"),
+      (id: "in2"),
+    ),
+    east: (
+      (id: "out"),
+    )
+  )
+  
+  element.elmt(
+    draw-shape: draw-shape,
+    x: x,
+    y: y,
+    w: w,
+    h: h,
+    name: name,
+    name-anchor: name-anchor,
+    ports: ports,
+    fill: fill,
+    stroke: stroke,
+    id: id,
+    auto-ports: false,
+    ports-y: (
+      in1: (h) => {h * 0.225},
+      in2: (h) => {h * 0.775},
+    ),
+    debug: debug
+  )
+}