protogen web interface works

4 files changed, 1055 insertions, 20 deletions

diff --git a/gerbonara/cad/primitives.py b/gerbonara/cad/primitives.py
index b566d76..abce1a4 100644
--- a/gerbonara/cad/primitives.py
+++ b/gerbonara/cad/primitives.py
@@ -342,17 +342,21 @@ class THTPad(Pad):
         x, y, rotation = self.abs_pos
         self.pad_top.parent = self
         self.pad_top.render(layer_stack)
-        self.pad_bottom.parent = self
-        self.pad_bottom.render(layer_stack)
+        if self.pad_bottom:
+            self.pad_bottom.parent = self
+            self.pad_bottom.render(layer_stack)
 
         if self.aperture_inner is None:
             (x_min, y_min), (x_max, y_max) = self.pad_top.bounding_box(MM)
             w_top = x_max - x_min
             h_top = y_max - y_min
-            (x_min, y_min), (x_max, y_max) = self.pad_bottom.bounding_box(MM)
-            w_bottom = x_max - x_min
-            h_bottom = y_max - y_min
-            self.aperture_inner = CircleAperture(min(w_top, h_top, w_bottom, h_bottom), unit=MM)
+            if self.pad_bottom:
+                (x_min, y_min), (x_max, y_max) = self.pad_bottom.bounding_box(MM)
+                w_bottom = x_max - x_min
+                h_bottom = y_max - y_min
+                w_top = min(w_top, w_bottom)
+                h_top = min(h_top, h_bottom)
+            self.aperture_inner = CircleAperture(min(w_top, h_top), unit=MM)
 
         for (side, use), layer in layer_stack.inner_layers:
             layer.objects.append(Flash(x, y, self.aperture_inner.rotated(rotation), unit=self.unit))
@@ -368,24 +372,24 @@ class THTPad(Pad):
         return False
 
     @classmethod
-    def rect(kls, x, y, hole_dia, w, h=None, rotation=0, mask_expansion=0.0, paste_expansion=0.0, paste=True, unit=MM):
+    def rect(kls, x, y, hole_dia, w, h=None, rotation=0, mask_expansion=0.0, paste_expansion=0.0, paste=True, plated=True, unit=MM):
         if h is None:
             h = w
         pad = SMDPad.rect(0, 0, w, h, mask_expansion=mask_expansion, paste_expansion=paste_expansion, paste=paste, unit=unit)
-        return kls(x, y, hole_dia, pad, rotation=rotation, unit=unit)
+        return kls(x, y, hole_dia, pad, rotation=rotation, plated=plated, unit=unit)
 
     @classmethod
-    def circle(kls, x, y, hole_dia, dia, mask_expansion=0.0, paste_expansion=0.0, paste=True, unit=MM):
+    def circle(kls, x, y, hole_dia, dia, mask_expansion=0.0, paste_expansion=0.0, paste=True, plated=True, unit=MM):
         pad = SMDPad.circle(0, 0, dia, mask_expansion=mask_expansion, paste_expansion=paste_expansion, paste=paste, unit=unit)
-        return kls(x, y, hole_dia, pad, unit=unit)
+        return kls(x, y, hole_dia, pad, plated=plated, unit=unit)
 
     @classmethod
-    def obround(kls, x, y, hole_dia, w, h, rotation=0, mask_expansion=0.0, paste_expanson=0.0, paste=True, unit=MM):
+    def obround(kls, x, y, hole_dia, w, h, rotation=0, mask_expansion=0.0, paste_expanson=0.0, paste=True, plated=True, unit=MM):
         ap_c = CircleAperture(dia, unit=unit)
         ap_m = CircleAperture(dia+2*mask_expansion, unit=unit)
         ap_p = CircleAperture(dia+2*paste_expansion, unit=unit) if paste else None
         pad = SMDPad(0, 0, side='top', copper_aperture=ap_c, mask_aperture=ap_m, paste_aperture=ap_p, unit=unit)
-        return kls(x, y, hole_dia, pad, rotation=rotation, unit=unit)
+        return kls(x, y, hole_dia, pad, rotation=rotation, plated=plated, unit=unit)
 
 
 @dataclass
diff --git a/gerbonara/cad/protoboard.py b/gerbonara/cad/protoboard.py
index 41276e2..a3d616f 100644
--- a/gerbonara/cad/protoboard.py
+++ b/gerbonara/cad/protoboard.py
@@ -57,9 +57,9 @@ class PropLayout:
             first = bool(i == 0)
             last = bool(i == len(self.content)-1)
             yield from child.generate(bbox, (
-                border_text[0] and (first or self.direction == 'h'),
+                border_text[0] and (last or self.direction == 'h'),
                 border_text[1] and (last or self.direction == 'v'),
-                border_text[2] and (last or self.direction == 'h'),
+                border_text[2] and (first or self.direction == 'h'),
                 border_text[3] and (first or self.direction == 'v'),
                 ), unit)
 
@@ -493,19 +493,20 @@ def eval_value(value, total_length=None):
 
 
 def _demo():
-    #pattern1 = PatternProtoArea(2.54, obj=THTPad.circle(0, 0, 0.9, 1.8, paste=False))
+    pattern1 = PatternProtoArea(2.54, obj=THTPad.circle(0, 0, 0.9, 1.8, paste=False))
     pattern2 = PatternProtoArea(1.2, 2.0, obj=SMDPad.rect(0, 0, 1.0, 1.8, paste=False))
-    #pattern3 = PatternProtoArea(2.54, 1.27, obj=SMDPad.rect(0, 0, 2.3, 1.0, paste=False))
-    pattern3 = EmptyProtoArea(copper_fill=True)
-    stack = TwoSideLayout(pattern2, pattern3)
-    #pattern = PropLayout([pattern1, stack], 'h', [0.5, 0.5])
+    pattern3 = PatternProtoArea(2.54, 1.27, obj=SMDPad.rect(0, 0, 2.3, 1.0, paste=False))
+    #pattern3 = EmptyProtoArea(copper_fill=True)
+    #stack = TwoSideLayout(pattern2, pattern3)
+    stack = PropLayout([pattern2, pattern3], 'v', [0.5, 0.5])
+    pattern = PropLayout([pattern1, stack], 'h', [0.5, 0.5])
     #pattern = PatternProtoArea(2.54, obj=ManhattanPads(2.54))
     #pattern = PatternProtoArea(2.54, obj=PoweredProto())
     #pattern = PatternProtoArea(2.54, obj=RFGroundProto())
     #pattern = PatternProtoArea(2.54*1.5, obj=THTFlowerProto())
     #pattern = PatternProtoArea(2.54, obj=THTPad.circle(0, 0, 0.9, 1.8, paste=False))
     #pattern = PatternProtoArea(2.54, obj=PoweredProto())
-    pb = ProtoBoard(100, 80, stack, mounting_hole_dia=3.2, mounting_hole_offset=5)
+    pb = ProtoBoard(100, 80, pattern, mounting_hole_dia=3.2, mounting_hole_offset=5)
     print(pb.pretty_svg())
     pb.layer_stack().save_to_directory('/tmp/testdir')
 
diff --git a/gerbonara/cad/protoserve.py b/gerbonara/cad/protoserve.py
new file mode 100644
index 0000000..0bf9dce
--- /dev/null
+++ b/gerbonara/cad/protoserve.py
@@ -0,0 +1,131 @@
+#!/usr/bin/env python
+
+import importlib.resources
+from tempfile import TemporaryDirectory
+from pathlib import Path
+
+from quart import Quart, request, Response
+
+from . import protoboard as pb
+from . import protoserve_data
+from ..utils import MM, Inch
+
+
+def extract_importlib(package):
+    root = TemporaryDirectory()
+
+    stack = [(importlib.resources.files(package), Path(root.name))]
+    while stack:
+        res, out = stack.pop()
+
+        for item in res.iterdir():
+            item_out = out / item.name
+            if item.is_file():
+                item_out.write_bytes(item.read_bytes())
+            else:
+                assert item.is_dir()
+                item_out.mkdir()
+                stack.push((item, item_out))
+
+    return root
+
+static_folder = extract_importlib(protoserve_data)
+app = Quart(__name__, static_folder=static_folder.name)
+
+@app.route('/')
+async def index():
+    return await app.send_static_file('protoserve.html')
+
+def deserialize(obj, unit):
+    pitch_x = float(obj.get('pitch_x', 1.27))
+    pitch_y = float(obj.get('pitch_y', 1.27))
+    clearance = float(obj.get('clearance', 0.2))
+
+    match obj['type']:
+        case 'layout':
+            proportions = [float(child['layout_prop']) for child in obj['children']]
+            content = [deserialize(child, unit) for child in obj['children']]
+            return pb.PropLayout(content, obj['direction'], proportions)
+
+        case 'placeholder':
+            return pb.EmptyProtoArea()
+
+        case 'smd':
+            match obj['pad_shape']:
+                case 'rect':
+                    pad = pb.SMDPad.rect(0, 0, pitch_x-clearance, pitch_y-clearance, paste=False, unit=unit)
+                case 'circle':
+                    pad = pb.SMDPad.circle(0, 0, min(pitch_x, pitch_y)-clearance, paste=False, unit=unit)
+            return pb.PatternProtoArea(pitch_x, pitch_y, obj=pad, unit=unit)
+
+        case 'tht':
+            hole_dia = float(obj['hole_dia'])
+            match obj['plating']:
+                case 'plated':
+                    oneside, plated = False, True
+                case 'nonplated':
+                    oneside, plated = False, False
+                case 'singleside':
+                    oneside, plated = True, False
+
+            match obj['pad_shape']:
+                case 'rect':
+                    pad = pb.THTPad.rect(0, 0, hole_dia, pitch_x-clearance, pitch_y-clearance, paste=False, plated=plated, unit=unit)
+                case 'circle':
+                    pad = pb.THTPad.circle(0, 0, hole_dia, min(pitch_x, pitch_y)-clearance, paste=False, plated=plated, unit=unit)
+                case 'obround':
+                    pad = pb.THTPad.obround(0, 0, hole_dia, pitch_x-clearance, pitch_y-clearance, paste=False, plated=plated, unit=unit)
+
+            if oneside:
+                pad.pad_bottom = None
+
+            return pb.PatternProtoArea(pitch_x, pitch_y, obj=pad, unit=unit)
+
+        case 'manhattan':
+            return pb.PatternProtoArea(pitch_x, pitch_y, obj=pb.ManhattanPads(pitch_x, pitch_y, clearance, unit=unit), unit=unit)
+
+        case 'powered':
+            pitch = float(obj.get('pitch', 2.54))
+            hole_dia = float(obj['hole_dia'])
+            via_drill = float(obj['via_hole_dia'])
+            trace_width = float(obj['trace_width'])
+            return pb.PatternProtoArea(pitch, pitch, pb.PoweredProto(pitch, hole_dia, clearance, via_size=via_drill, trace_width=trace_width, unit=unit), unit=unit)
+
+        case 'flower':
+            pitch = float(obj.get('pitch', 2.54))
+            hole_dia = float(obj['hole_dia'])
+            pattern_dia = float(obj['pattern_dia'])
+            return pb.PatternProtoArea(2*pitch, 2*pitch, pb.THTFlowerProto(pitch, hole_dia, pattern_dia, unit=unit), unit=unit)
+
+        case 'rf':
+            pitch = float(obj.get('pitch', 2.54))
+            hole_dia = float(obj['hole_dia'])
+            via_dia = float(obj['via_dia'])
+            via_drill = float(obj['via_hole_dia'])
+            return pb.PatternProtoArea(pitch, pitch, pb.RFGroundProto(pitch, hole_dia, clearance, via_dia, via_drill, unit=MM), unit=MM)
+
+@app.route('/preview.svg', methods=['POST'])
+async def preview():
+    obj = await request.get_json()
+
+    unit = Inch if obj.get('units' == 'us') else MM
+    w = float(obj.get('width', unit(100, MM)))
+    h = float(obj.get('height', unit(80, MM)))
+    corner_radius = float(obj.get('round_corners', {}).get('radius', unit(1.5, MM)))
+    holes = obj.get('mounting_holes', {})
+    mounting_hole_dia = float(holes.get('diameter', unit(3.2, MM)))
+    mounting_hole_offset = float(holes.get('offset', unit(5, MM)))
+
+    content = deserialize(obj['children'][0], unit)
+
+    board = pb.ProtoBoard(w, h, content,
+                       corner_radius=corner_radius,
+                       mounting_hole_dia=mounting_hole_dia,
+                       mounting_hole_offset=mounting_hole_offset,
+                       unit=unit)
+    return Response(str(board.pretty_svg()), mimetype='image/svg+xml')
+
+
+if __name__ == '__main__':
+    app.run()
+
diff --git a/gerbonara/cad/protoserve_data/protoserve.html b/gerbonara/cad/protoserve_data/protoserve.html
new file mode 100644
index 0000000..4b116b2
--- /dev/null
+++ b/gerbonara/cad/protoserve_data/protoserve.html
@@ -0,0 +1,899 @@
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        <title>Protoserve</title>
+        <link rel="icon" type="image/png" href="static/favicon-512.png">
+        <link rel="apple-touch-icon" href="static/favicon-512.png">
+        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+<style>
+:root {
+    --u-display-metric: default;
+    --u-display-us: none;
+}
+
+html, body {
+    margin: 0;
+    width: 100%;
+    height: 100%;
+}
+
+body {
+    display: grid;
+    grid-template-columns: clamp(200px, 500px, 50vw) 1fr;
+    grid-template-rows: 1fr 0fr;
+    grid-template-areas: "controls main"
+                         "links main";
+
+}
+
+#controls {
+    grid-area: controls;
+    user-select: none;
+    display: grid;
+    grid-template-columns: 10fr 1fr 1fr;
+    align-content: start;
+    overflow-y: scroll;
+}
+
+label {
+    grid-column-start: 1;
+    grid-column-end: span 3;
+    display: grid;
+    grid-template-columns: subgrid;
+    text-align: right;
+}
+
+input[type="checkbox"] {
+    justify-self: start;
+}
+
+input {
+    align-self: start;
+}
+
+.group > h4, .group > h5 {
+    text-align: center;
+    margin: 5px;
+    grid-column-start: 1;
+    grid-column-end: span 3;
+}
+
+.expand > :first-child {
+    grid-column-start: 1;
+    grid-column-end: span 3;
+}
+
+.group, .field, .expand {
+    grid-column-start: 1;
+    grid-column-end: span 3;
+    display: grid;
+    grid-template-columns: subgrid;
+    align-content: start;
+}
+
+.group {
+    background-color: hsl(.0turn 50% 10% / 4%);
+    padding: 10px;
+    border-radius: 10px;
+    box-shadow: 0 0 8px 0px hsl(0 0% 0% / 20%);
+    margin: 10px 0 10px 0;
+}
+
+.expand > .field:first-child {
+    display: grid;
+    grid-template-columns: 1fr 100fr 1fr;
+    align-items: center;
+    text-align: left;
+    width: 100%;
+    position: relative;
+}
+
+.group > .content {
+    grid-column-start: 1;
+    grid-column-end: span 3;
+    display: flex;
+    flex-direction: column;
+    text-align: center;
+}
+
+.group > div > .proportion {
+    display: none;
+}
+
+.proportional > div > .proportion {
+    display: grid;
+}
+
+.split-sides .double-sided-only {
+    display: none;
+}
+
+.split-sides > .placeholder .area-controls {
+    display: none;
+}
+
+.board > .placeholder > .area-controls {
+    display: none;
+}
+
+.area-controls .area-move {
+    display: none;
+}
+
+.area-controls .area-move::before {
+    content: "/";
+    padding: 0 5px 0 5px;
+}
+
+.group.proportional > .group > .area-controls .area-move {
+    display: block;
+}
+
+.content.area-controls {
+    flex-direction: row;
+    justify-content: center;
+}
+
+.field > input, .field > select { max-width: 5em;
+    text-align: right;
+    margin: 0 5px 0 5px;
+}
+
+.group.expand {
+    border-radius: 0;
+}
+
+.expand > :first-child {
+    font-weight: bold;
+}
+
+.expand.collapsed > :nth-child(n+2) {
+    display: none;
+}
+
+.unit.metric {
+    display: var(--u-display-metric);
+}
+
+.unit.us {
+    display: var(--u-display-us);
+}
+
+#preview {
+    grid-area: main;
+}
+
+#preview-image {
+    width: 100%;
+    height: 100%;
+    object-fit: contain;
+}
+
+#links {
+    grid-area: links;
+}
+
+.layout-area {
+    grid-column-start: 1;
+    grid-column-end: span 3;
+}
+
+.drop-target {
+    grid-column-start: 1;
+    grid-column-end: span 3;
+    text-align: center;
+    display: none;
+}
+
+.group.drop-enabled > .drop-target {
+    display: block;
+}
+
+.placeholder hr {
+    width: 3em;
+    border: none;
+    border-top: 1px solid hsl(0 0% 60%);
+}
+
+#controls.move-in-progress input {
+    background-color: hsl(0 0% 85%);
+}
+
+#controls.move-in-progress {
+    color: hsl(0 0% 60%);
+}
+
+</style>
+    </head>
+    <body>
+        <div id="controls">
+            <div class="group board">
+                <h4>Board settings</h4>
+                <label>Units
+                    <select name='units' value="metric">
+                        <option value="metric">Metric</option>
+                        <option value="us">US Customary</option>
+                    </select>
+                </label>
+
+                <label>Board width
+                    <input name="width" type="text" placeholder="width" value="100">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">inch</span>
+                </label>
+
+                <label>Board height
+                    <input name="height" type="text" placeholder="height" value="80">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">inch</span>
+                </label>
+
+                <div class="group expand" data-group="round_corners">
+                    <label>Round corners
+                        <input name="enabled" type="checkbox" checked>
+                    </label>
+
+                    <label>Radius
+                        <input name="radius" type="text" placeholder="radius" value="1.5">
+                        <span class="unit metric">mm</span> 
+                        <span class="unit us">inch</span> 
+                    </label>
+                </div>
+
+                <div class="group expand" data-group="mounting_holes">
+                    <label>Mounting holes
+                        <input name="enabled" type="checkbox" name="has_holes" checked>
+                    </label>
+
+                    <label>Diameter
+                        <input type="text" placeholder="diameter" name="diameter" value="3.2"></input>
+                        <span class="unit metric">mm</span> 
+                        <span class="unit us">inch</span> 
+                    </label>
+
+                    <label>Board edge to hole center
+                        <input type="text" placeholder="distance" name="offset" value="5"></input>
+                        <span class="unit metric">mm</span> 
+                        <span class="unit us">inch</span> 
+                    </label>
+                </div>
+
+                <h4>Content</h4>
+                <div class="group placeholder"></div>
+            </div>
+        </div>
+        <div id="preview">
+            <img id="preview-image" alt="Automatically generated preview image"/>
+        </div>
+        <div id="links">
+            <a href="#controls">Settings</a>
+            <a href="#preview">Preview</a>
+            <a href='/download'>
+                <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" width="1em">
+                    <title>Download</title>
+                    <!--! Font Awesome Pro 6.4.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license (Commercial License) Copyright 2023 Fonticons, Inc. --><path d="M288 32c0-17.7-14.3-32-32-32s-32 14.3-32 32V274.7l-73.4-73.4c-12.5-12.5-32.8-12.5-45.3 0s-12.5 32.8 0 45.3l128 128c12.5 12.5 32.8 12.5 45.3 0l128-128c12.5-12.5 12.5-32.8 0-45.3s-32.8-12.5-45.3 0L288 274.7V32zM64 352c-35.3 0-64 28.7-64 64v32c0 35.3 28.7 64 64 64H448c35.3 0 64-28.7 64-64V416c0-35.3-28.7-64-64-64H346.5l-45.3 45.3c-25 25-65.5 25-90.5 0L165.5 352H64zm368 56a24 24 0 1 1 0 48 24 24 0 1 1 0-48z"/>
+                </svg>
+                Gerbers
+            </a>
+        </div>
+
+        <template id="tpl-drop-target">
+            <a class="drop-target" href="#">
+                <svg viewBox="0 0 532 532" width="1em" xmlns="http://www.w3.org/2000/svg">
+                    <title>Move here</title>
+                    <path id="path2" d="m 424.025,300.075 c 17.7,0 32,-14.3 32,-32 0,-17.7 -14.3,-32 -32,-32 h -82.7 l 181.3,-181.4 c 12.5,-12.5 12.5,-32.8 0,-45.3 -12.5,-12.5 -32.8,-12.5 -45.3,0 l -181.3,181.4 v -82.7 c 0,-17.7 -14.3,-32 -32,-32 -17.7,0 -32,14.3 -32,32 v 160 c 0,17.7 14.3,32 32,32 z M 80,52 C 35.8,52 0,87.8 0,132 v 320 c 0,44.2 35.8,80 80,80 h 320 c 44.2,0 80,-35.8 80,-80 v -72 c 0,-17.7 -14.3,-32 -32,-32 -17.7,0 -32,14.3 -32,32 v 72 c 0,8.8 -7.2,16 -16,16 H 80 c -8.8,0 -16,-7.2 -16,-16 V 132 c 0,-8.8 7.2,-16 16,-16 h 72 c 17.7,0 32,-14.3 32,-32 0,-17.7 -14.3,-32 -32,-32 z" />
+                </svg>
+            </a>
+        </template>
+
+        <template id="tpl-g-layout">
+            <div data-type="layout" class="group proportional">
+                <h4>Proportional Layout</h4>
+                <span class="content area-controls">(<a href="#" class="area-remove">Remove</a><a href="#" class="area-move">Move</a>)</span>
+                <label class="proportion">Proportion
+                    <input type="text" name="layout_prop" value="1">
+                </label>
+
+                <h5>Layout settings</h4>
+                <label>Direction
+                    <select name="direction" value="horizontal">
+                        <option value="h">horizontal</option>
+                        <option value="v">vertical</option>
+                    </select>
+                </label>
+
+                <h5>Content</h4>
+                <div class="drop-target"></div>
+                <div class="placeholder"></div>
+                <div class="drop-target"></div>
+                <div class="placeholder"></div>
+                <div class="drop-target"></div>
+                <a class="content add-element" href="#">Add element</a>
+            </div>
+        </template>
+
+        <template id="tpl-g-twoside">
+            <div class="group split-sides">
+                <h4>Split front and back</h4>
+                <span class="content area-controls">(<a href="#" class="area-remove">Remove</a><a href="#" class="area-move">Move</a>)</span>
+                <label class="proportion">Proportion
+                    <input type="text" name="layout_prop" value="1">
+                </label>
+
+                <h5>Front</h5>
+                <div class="placeholder"></div>
+                <h5>Back</h5>
+                <div class="placeholder"></div>
+            </div>
+        </template> 
+
+        <template id="tpl-g-placeholder">
+            <div data-type="placeholder" class="group placeholder">
+                <h4>Empty area</h4>
+                <span class="content area-controls">(<a href="#" class="area-remove">Remove</a><a href="#" class="area-move">Move</a>)</span>
+                <label class="proportion">Proportion
+                    <input type="text" name="layout_prop" value="1">
+                </label>
+
+                <div class="content">
+                    <a href="#" data-placeholder="layout">Create Layout</a>
+                    <a href="#" data-placeholder="twoside" class="double-sided-only">Split front and back</a>
+                    <hr/>
+                    <a href="#" data-placeholder="smd">SMD area</a>
+                    <a href="#" data-placeholder="tht" class="double-sided-only">THT area</a>
+                    <a href="#" data-placeholder="manhattan">Manhattan area</a>
+                    <a href="#" data-placeholder="flower"class="double-sided-only">THT Flower area</a>
+                    <a href="#" data-placeholder="powered"class="double-sided-only">Powered THT area</a>
+                    <a href="#" data-placeholder="rf"class="double-sided-only">RF THT area</a>
+                </div>
+            </div>
+        </template>
+
+        <template id="tpl-g-smd">
+            <div data-type="smd" class="group smd">
+                <h4>SMD area</h4>
+                <span class="content area-controls">(<a href="#" class="area-remove">Remove</a><a href="#" class="area-move">Move</a>)</span>
+                <label class="proportion">Proportion
+                    <input type="text" name="layout_prop" value="1">
+                </label>
+
+                <h5>Area Settings</h5>
+                <label>Pitch X
+                    <input type="text" name="pitch_x" placeholder="length" value="1.27">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Pitch Y
+                    <input type="text" name="pitch_y" placeholder="length" value="2.54">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Clearance
+                    <input type="text" name="clearance" placeholder="length" value="0.3">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Pad shape
+                    <select name="pad_shape" value="rect">
+                        <option value="rect">(Rounded) Rectangle</option>
+                        <option value="circle">Circle</option>
+                        <option value="obround">Obround</option>
+                    </select>
+                </label>
+                <label class="only-shape rect">Corner radius
+                    <input type="text" name="pad_h" placeholder="length" value="0">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+            </div>
+        </template>
+
+        <template id="tpl-g-tht">
+            <div data-type="tht" class="group tht">
+                <h4>THT area</h4>
+                <span class="content area-controls">(<a href="#" class="area-remove">Remove</a><a href="#" class="area-move">Move</a>)</span>
+                <label class="proportion">Proportion
+                    <input type="text" name="layout_prop" value="1">
+                </label>
+
+                <h5>Area Settings</h5>
+                <label>Pitch X
+                    <input type="text" name="pitch_x" placeholder="length" value="2.54">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Pitch Y
+                    <input type="text" name="pitch_y" placeholder="length" value="2.54">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Clearance
+                    <input type="text" name="clearance" placeholder="length" value="0.5">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Plating
+                    <select name="plating" value="through">
+                        <option value="plated">Double-sided, through-plated</option>
+                        <option value="nonplated">Double-sided, non-plated</option>
+                        <option value="singleside">Single-sided, non-plated</option>
+                    </select>
+                </label>
+                <label>Hole diameter
+                    <input type="text" name="hole_dia" placeholder="length" value="0.9">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Pad shape
+                    <select name="pad_shape" value="circle">
+                        <option value="circle">Circle</option>
+                        <option value="rect">(Rounded) Rectangle</option>
+                        <option value="obround">Obround</option>
+                    </select>
+                </label>
+                <label class="only-shape rect">Corner radius
+                    <input type="text" name="pad_h" placeholder="length" value="0">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+            </div>
+        </template>
+
+        <template id="tpl-g-manhattan">
+            <div data-type="manhattan" class="group manhattan">
+                <h4>Manhattan area</h4>
+                <span class="content area-controls">(<a href="#" class="area-remove">Remove</a><a href="#" class="area-move">Move</a>)</span>
+                <label class="proportion">Proportion
+                    <input type="text" name="layout_prop" value="1">
+                </label>
+
+                <h5>Area Settings</h5>
+                <label>Pitch X
+                    <input type="text" name="pitch_x" placeholder="length" value="5.08">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Pitch Y
+                    <input type="text" name="pitch_y" placeholder="length" value="5.08">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Clearance
+                    <input type="text" name="clearance" placeholder="length" value="0.5">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+            </div>
+        </template>
+
+        <template id="tpl-g-flower">
+            <div data-type="flower" class="group flower">
+                <h4>THT flower area</h4>
+                <span class="content area-controls">(<a href="#" class="area-remove">Remove</a><a href="#" class="area-move">Move</a>)</span>
+                <label class="proportion">Proportion
+                    <input type="text" name="layout_prop" value="1">
+                </label>
+
+                <h5>Area Settings</h5>
+                <label>Pitch
+                    <input type="text" name="pitch" placeholder="length" value="2.54">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Pattern diameter
+                    <input type="text" name="pattern_dia" placeholder="length" value="2.0">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Hole diameter
+                    <input type="text" name="hole_dia" placeholder="length" value="0.9">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Clearance
+                    <input type="text" name="clearance" placeholder="length" value="0.5">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+            </div>
+        </template>
+
+        <template id="tpl-g-powered">
+            <div data-type="powered" class="group powered">
+                <h4>Powered THT area</h4>
+                <span class="content area-controls">(<a href="#" class="area-remove">Remove</a><a href="#" class="area-move">Move</a>)</span>
+                <label class="proportion">Proportion
+                    <input type="text" name="layout_prop" value="1">
+                </label>
+
+                <h5>Area Settings</h5>
+                <label>Pitch
+                    <input type="text" name="pitch" placeholder="length" value="2.54">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Hole diameter
+                    <input type="text" name="hole_dia" placeholder="length" value="0.9">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Via drill
+                    <input type="text" name="via_hole_dia" placeholder="length" value="0.9">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Trace width
+                    <input type="text" name="trace_width" placeholder="length" value="0.5">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Clearance
+                    <input type="text" name="clearance" placeholder="length" value="0.5">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+            </div>
+        </template>
+
+        <template id="tpl-g-rf">
+            <div data-type="rf" class="group rf">
+                <h4>THT area with RF ground</h4>
+                <span class="content area-controls">(<a href="#" class="area-remove">Remove</a><a href="#" class="area-move">Move</a>)</span>
+                <label class="proportion">Proportion
+                    <input type="text" name="layout_prop" value="1">
+                </label>
+
+                <h5>Area Settings</h5>
+                <label>Pitch
+                    <input type="text" name="pitch" placeholder="length" value="2.54">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Hole diameter
+                    <input type="text" name="hole_dia" placeholder="length" value="0.9">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Trace width
+                    <input type="text" name="trace_width" placeholder="length" value="0.5">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Via diameter
+                    <input type="text" name="via_dia" placeholder="length" value="0.8">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Via drill
+                    <input type="text" name="via_hole_dia" placeholder="length" value="0.4">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+                <label>Clearance
+                    <input type="text" name="clearance" placeholder="length" value="0.5">
+                    <span class="unit metric">mm</span>
+                    <span class="unit us">mil</span>
+                </label>
+            </div>
+        </template>
+
+        <script>
+            document.querySelectorAll('.expand').forEach((elem) => {
+                const checkbox = elem.querySelector(':first-child > input');
+                checkbox.addEventListener("change", (evt) => {
+                    if (evt.currentTarget.checked) {
+                        elem.classList.remove('collapsed');
+                    } else {
+                        elem.classList.add('collapsed');
+                    }
+                });
+                if (checkbox.checked) {
+                    elem.classList.remove('collapsed');
+                } else {
+                    elem.classList.add('collapsed');
+                }
+            });
+
+            let g_dropElement = null;
+
+            function hookupAreaRemove(node) {
+                for (const bt of node.querySelectorAll('a.area-remove')) {
+                    bt.addEventListener('click', (evt) => {
+                        let elem = evt.target.closest('.group');
+                        if (elem.parentElement && elem.parentElement.matches('.proportional')) {
+                            let sibling = elem.previousElementSibling;
+                            if (sibling.matches('.drop-target')) {
+                                sibling.remove();
+                            }
+                            elem.remove();
+
+                        } else {
+                            elem.replaceWith(createPlaceholder());
+                        }
+
+                        previewReloader.scheduleCall();
+                    });
+                }
+            }
+
+            function createDropTarget() {
+                const node = document.querySelector('#tpl-drop-target').content.cloneNode(true);
+                node.querySelector('a').addEventListener('click', (evt) => {
+                    if (g_dropElement != null) {
+                        const target = evt.target.closest('a');
+
+                        let sibling = g_dropElement.previousElementSibling;
+                        if (sibling.matches('.drop-target')) {
+                            if (sibling == target) {
+                                return;
+                            }
+                            sibling.remove();
+                        }
+                        g_dropElement.remove();
+                        g_dropElement.querySelector('a.area-move').innerText = "Move";
+
+                        target.before(sibling);
+                        target.before(g_dropElement);
+
+                        document.querySelector('#controls').classList.remove('move-in-progress');
+                        document.querySelector('.group.drop-enabled').classList.remove('drop-enabled');
+                        g_dropElement = null;
+
+                        previewReloader.scheduleCall();
+                    }
+                });
+                return node;
+            }
+
+            function hookupAreaMove(node) {
+                for (const bt of node.querySelectorAll('a.area-move')) {
+                    bt.addEventListener('click', (evt) => {
+                        const controls = document.querySelector('#controls');
+                        const group = evt.target.closest('.group');
+
+                        if (g_dropElement == null) {
+                            controls.classList.add('move-in-progress');
+                            group.parentElement.classList.add('drop-enabled');
+                            g_dropElement = group;
+                            evt.target.innerText = "Cancel move";
+
+                        } else {
+                            controls.classList.remove('move-in-progress');
+                            group.parentElement.classList.remove('drop-enabled');
+                            g_dropElement = null;
+                            evt.target.innerText = "Move";
+                        }
+                    });
+                }
+            }
+
+            function hookupPreviewUpdate(node) {
+                for (const elem of node.querySelectorAll('select, input')) {
+                    elem.addEventListener('change', previewReloader.scheduleCall.bind(previewReloader));
+                }
+            }
+
+            function createLayoutItem(type) {
+                if (type == 'placeholder') {
+                    return createPlaceholder();
+                }
+
+                const template = document.querySelector(`#tpl-g-${type}`);
+                const node = template.content.cloneNode(true).firstElementChild;
+
+                hookupPreviewUpdate(node);
+                hookupAreaRemove(node);
+                hookupAreaMove(node);
+
+                for (const bt of node.querySelectorAll(':scope > a.add-element')) {
+                    bt.addEventListener('click', (evt) => {
+                        evt.target.before(createPlaceholder());
+                        evt.target.before(createDropTarget());
+                        previewReloader.scheduleCall();
+                    });
+                }
+
+                function updateShapeFilter(filterNode) {
+                    console.log(filterNode);
+                    for (elem of filterNode.closest('.group').querySelectorAll('.only-shape')) {
+                        if (elem.classList.contains(filterNode.value)) {
+                            elem.style.removeProperty('display');
+                        } else {
+                            elem.style.setProperty('display', 'none');
+                        }
+                    }
+                }
+
+                if (type == 'tht' || type == 'smd') {
+                    const filterNode = node.querySelector('select[name="pad_shape"]');
+                    updateShapeFilter(filterNode);
+                    filterNode.addEventListener('change', (evt) => {
+                        updateShapeFilter(evt.target);
+                    });
+                }
+
+                return node;
+            }
+
+            function createPlaceholder() {
+                const node = document.querySelector('#tpl-g-placeholder').content.cloneNode(true).firstElementChild;
+
+                hookupAreaRemove(node);
+                hookupAreaMove(node);
+
+                for (const bt of node.querySelectorAll('.placeholder a[data-placeholder]')) {
+                    bt.addEventListener('click', (evt) => {
+                        const item = createLayoutItem(evt.target.getAttribute('data-placeholder'));
+
+                        for (const elem of item.querySelectorAll('div.placeholder')) {
+                            elem.replaceWith(createPlaceholder());
+                        }
+
+                        for (const elem of item.querySelectorAll('div.drop-target')) {
+                            elem.replaceWith(createDropTarget());
+                        }
+
+                        evt.target.closest('.group').replaceWith(item);
+                        previewReloader.scheduleCall();
+                    });
+                }
+
+                return node;
+            }
+
+            function serializeNode(node) {
+                function serializeProperties(node) {
+                    let obj = {};
+                    for (const input of node.querySelectorAll(':scope > label > input, :scope > label > select')) {
+                        if (input.type == 'checkbox') {
+                            obj[input.name] = input.checked;
+
+                        } else {
+                            obj[input.name] = input.value;
+                        }
+                    }
+                    return obj;
+                }
+
+                const obj = serializeProperties(node);
+                
+                for (const expand of node.querySelectorAll(':scope > .group.expand')) {
+                    obj[expand.getAttribute('data-group')] = serializeProperties(expand);
+                }
+
+                const children = [];
+                for (const elem of node.querySelectorAll(':scope > .group:not(.expand)')) {
+                    const child = serializeNode(elem);
+                    child['type'] = elem.getAttribute('data-type');
+                    children.push(child);
+                }
+                obj['children'] = children;
+
+                return obj;
+            }
+
+            function serialize() {
+                const board = document.querySelector('.group.board');
+                return JSON.stringify(serializeNode(board));
+            }
+
+
+            function deserializeNode(node, obj) {
+                function deserializeProperties(node, obj) {
+                    for (const input of node.querySelectorAll(':scope > label > input, :scope > label > select')) {
+                        if (input.type == 'checkbox') {
+                            input.checked = obj[input.name];
+
+                        } else {
+                            input.value = obj[input.name];
+                        }
+                    }
+                }
+
+                deserializeProperties(node, obj);
+                
+                for (const expand of node.querySelectorAll(':scope > .group.expand')) {
+                    deserializeProperties(expand, obj[expand.getAttribute('data-group')]);
+                }
+
+                for (const child of obj['children']) {
+                    const type = child['type'];
+                    if (type) {
+                        const item = createLayoutItem(type);
+                        deserializeNode(item, child);
+
+                        if (type == 'layout') {
+                            for (const elem of item.querySelectorAll('div.placeholder, div.drop-target')) {
+                                elem.remove();
+                            }
+
+                        } else {
+                            for (const elem of item.querySelectorAll('div.drop-target')) {
+                                elem.replaceWith(createDropTarget());
+                            }
+                        }
+
+                        if (obj['type'] == 'layout') {
+                            const addLink = node.querySelector(':scope > a.add-element');
+                            addLink.before(item);
+                            addLink.before(createDropTarget());
+
+                        } else {
+                            const placeholder = node.querySelector('div.placeholder');
+                            placeholder.replaceWith(item);
+                        }
+                    }
+                }
+            }
+
+            function deserialize(json) {
+                const board = document.querySelector('.group.board');
+                const data = JSON.parse(json);
+                deserializeNode(board, data);
+                previewReloader.scheduleCall();
+            }
+
+            class RateLimiter {
+                constructor(callback, interval_ms) {
+                    this.callback = callback;
+                    this.interval_ms = interval_ms;
+                    this.lastRan = -1e99;
+                    this.timerId = null;
+                }
+
+                callNow() {
+                    const now = performance.timeOrigin + performance.now();
+                    this.lastRan = now;
+                    this.timerId = null;
+                    this.callback();
+                }
+
+                scheduleCall() {
+                    const now = performance.timeOrigin + performance.now();
+                    const timeRemaining = this.interval_ms - (now - this.lastRan);
+                    console.log('scheduling', timeRemaining);
+                    if (!this.timerId) {
+                        if (timeRemaining <= 0) {
+                            this.callNow();
+                        } else {
+                            const callback = this.callback;
+                            this.timerId = setTimeout(this.callNow.bind(this), timeRemaining);
+                        }
+                    }
+                }
+            }
+
+            previewBlobURL = null;
+            previewReloader = new RateLimiter(async () => {
+                const response = await fetch('preview.svg', {
+                    method: 'POST',
+                    mode: 'same-origin',
+                    cache: 'no-cache',
+                    headers: {'Content-Type': 'application/json'},
+                    body: serialize(),
+                });
+                const data = await response.blob();
+                if (previewBlobURL) {
+                    URL.revokeObjectURL(previewBlobURL);
+                }
+                previewBlobURL = URL.createObjectURL(data);
+                document.querySelector('#preview-image').src = previewBlobURL;
+            }, 1000);
+
+            document.querySelector('div.placeholder').replaceWith(createPlaceholder());
+
+            for (elem of document.querySelectorAll('select[name="units"]')) {
+                elem.addEventListener('change', (evt) => {
+                    const style = evt.target.closest('.group').style;
+                    for (const unit of ['metric', 'us']) {
+                        const value = (unit == evt.target.value) ? 'default' : 'none';
+                        style.setProperty(`--u-display-${unit}`, value);
+                    }
+                });
+            }
+
+            hookupPreviewUpdate(document.querySelector('.group.board'));
+            previewReloader.scheduleCall();
+        </script>
+    </body>
+</html>