split up sources into manageable files

src/elements/element.typ

@@ -0,0 +1,99 @@
+#import "@preview/cetz:0.2.2": draw, coordinate
+#import "ports.typ": add-ports, add-port
+
+#let find-port(ports, id) = {
+  for (side, side-ports) in ports {
+    for (i, port) in side-ports.enumerate() {
+      if port.id == id {
+        return (side, i)
+      }
+    }
+  }
+  panic("Could not find port with id " + str(id))
+}
+
+#let default-draw-shape(id, tl, tr, br, bl, fill, stroke) = {
+  return ({}, tl, tr, br, bl)
+}
+
+#let elmt(
+  draw-shape: default-draw-shape,
+  x: none,
+  y: none,
+  w: none,
+  h: none,
+  name: none,
+  name-anchor: "center",
+  ports: (),
+  ports-margins: (),
+  fill: none,
+  stroke: black + 1pt,
+  id: "",
+  auto-ports: true,
+  ports-y: (),
+  debug: (
+    grid: false,
+    ports: false
+  )
+) = draw.get-ctx(ctx => {
+  let width = w
+  let height = h
+
+  let y = y
+  if x == none { panic("Parameter x must be set") }
+  if y == none { panic("Parameter y must be set") }
+  if w == none { panic("Parameter w must be set") }
+  if h == none { panic("Parameter h must be set") }
+
+  if (type(y) == dictionary) {
+    let from = y.from
+    let to = y.to
+    let (to-side, i) = find-port(ports, to)
+    let margins = (0%, 0%)
+    if to-side in ports-margins {
+      margins = ports-margins.at(to-side)
+    }
+    let used-pct = 100% - margins.at(0) - margins.at(1)
+    let used-height = height * used-pct / 100%
+    let top-margin = height * margins.at(0) / 100%
+    
+    let dy = used-height * (i + 1) / (ports.at(to-side).len() + 1)
+
+    if not auto-ports {
+      top-margin = 0
+      dy = ports-y.at(to)(height)
+    }
+    
+    let (ctx, from-pos) = coordinate.resolve(ctx, from)
+    y = from-pos.at(1) + dy - height + top-margin
+  }
+
+  let tl = (x, y + height)
+  let tr = (x + width, y + height)
+  let br = (x + width, y)
+  let bl = (x, y)
+
+  // Workaround because CeTZ needs to have all draw functions in the body
+  let func = {}
+  (func, tl, tr, br, bl) = draw-shape(id, tl, tr, br, bl, fill, stroke)
+  func
+
+  if (name != none) {
+    draw.content(
+      (name: id, anchor: name-anchor),
+      anchor: name-anchor,
+      padding: 0.5em,
+      align(center)[*#name*]
+    )
+  }
+
+  if auto-ports {
+    add-ports(
+      id,
+      tl, tr, br, bl,
+      ports,
+      ports-margins,
+      debug: debug.ports
+    )
+  }
+})