added logic gates

src/elements/logic/gate.typ

@@ -0,0 +1,127 @@
+#import "@preview/cetz:0.2.2": draw, coordinate
+#import "../ports.typ": add-ports, add-port
+#import "../element.typ"
+
+#let default-draw-shape(id, tl, tr, br, bl, fill, stroke) = {
+  let f = {draw.rect(tl, br, fill: fill, stroke: stroke)}
+  return (f, tl, tr, br, bl)
+}
+
+#let gate(
+  draw-shape: default-draw-shape,
+  x: none,
+  y: none,
+  w: none,
+  h: none,
+  inputs: 2,
+  fill: none,
+  stroke: black + 1pt,
+  id: "",
+  inverted: (),
+  debug: (
+    ports: false
+  )
+) = draw.get-ctx(ctx => {
+  let width = w
+  let height = h
+
+  let x = x
+  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(x) == dictionary) {
+    let offset = x.rel
+    let to = x.to
+    let (ctx, to-pos) = coordinate.resolve(ctx, (rel: (offset, 0), to: to))
+    x = to-pos.at(0)
+  }
+  
+  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)
+    
+    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)
+  {
+    //draw.rect(tl, br)
+    func
+  }
+
+  let space = 100% / (inputs + 1)
+  for i in range(inputs) {
+    let pct = (i + 1) * space
+    let a = (tl, pct, bl)
+    let b = (tr, pct, br)
+    let int-name = id + "i" + str(i)
+    draw.intersections(
+      int-name,
+      func,
+      draw.hide(draw.line(a, b))
+    )
+    let port-name = "in" + str(i)
+    let port-pos = int-name + ".0"
+    if inverted == "all" or port-name in inverted {
+      draw.circle(port-pos, radius: .2, anchor: "east", stroke: stroke)
+      port-pos = (rel: (-.4, 0), to: port-pos)
+    }
+    add-port(
+      id, "west",
+      (id: port-name), port-pos,
+      debug: debug.ports
+    )
+  }
+
+  let out-pos = id + ".east"
+  if inverted == "all" or "out" in inverted {
+    draw.circle(out-pos, radius: .2, anchor: "west", stroke: stroke)
+    out-pos = (rel: (.4, 0), to: out-pos)
+  }
+  add-port(
+    id, "east",
+    (id: "out"), out-pos,
+    debug: debug.ports
+  )
+})
+/* {
+  let ports = (west: (), east: ((id: "out"),))
+  for i in range(inputs) {
+    ports.west.push((id: "in"+str(i)))
+  }
+
+  element.elmt(
+    draw-shape: draw-shape,
+    x: x,
+    y: y,
+    w: w,
+    h: h,
+    ports: ports,
+    fill: fill,
+    stroke: stroke,
+    id: id,
+    auto-ports: true,
+    debug: debug
+  )
+}