Add support for S_RECT drawsegment

Fixes #180

Author: qu1ck

DATAFORMAT.md

@@ -122,7 +122,18 @@ attribute.
 {
   "type": "segment",
   "start": [x, y],
-  "end": end,
+  "end": [x, y],
+  "width": width,
+}
+```
+
+### rect
+
+```js
+{
+  "type": "rect",
+  "start": [x, y], // coordinates of opposing corners
+  "end": [x, y],
   "width": width,
 }
 ```

InteractiveHtmlBom/ecad/kicad.py

@@ -46,13 +46,14 @@ def parse_draw_segment(self, d):
             pcbnew.S_ARC: "arc",
             pcbnew.S_POLYGON: "polygon",
             pcbnew.S_CURVE: "curve",
+            pcbnew.S_RECT: "rect",
         }.get(d.GetShape(), "")
         if shape == "":
             self.logger.info("Unsupported shape %s, skipping", d.GetShape())
             return None
         start = self.normalize(d.GetStart())
         end = self.normalize(d.GetEnd())
-        if shape == "segment":
+        if shape in ["segment", "rect"]:
             return {
                 "type": shape,
                 "start": start,

InteractiveHtmlBom/web/render.js

@@ -132,6 +132,13 @@ function drawedge(ctx, scalefactor, edge, color) {
       ctx.moveTo(...edge.start);
       ctx.lineTo(...edge.end);
     }
+    if (edge.type == "rect") {
+      ctx.moveTo(...edge.start);
+      ctx.lineTo(edge.start[0], edge.end[1]);
+      ctx.lineTo(...edge.end);
+      ctx.lineTo(edge.end[0], edge.start[1]);
+      ctx.lineTo(...edge.start);
+    }
     if (edge.type == "arc") {
       ctx.arc(
         ...edge.start,
@@ -363,7 +370,7 @@ function drawModules(canvas, layer, scalefactor, highlight) {
 function drawBgLayer(layername, canvas, layer, scalefactor, edgeColor, polygonColor, textColor) {
   var ctx = canvas.getContext("2d");
   for (var d of pcbdata[layername][layer]) {
-    if (["segment", "arc", "circle", "curve"].includes(d.type)) {
+    if (["segment", "arc", "circle", "curve", "rect"].includes(d.type)) {
       drawedge(ctx, scalefactor, d, edgeColor);
     } else if (d.type == "polygon") {
       drawPolygonShape(ctx, d, polygonColor);