summaryrefslogtreecommitdiff
path: root/gerbonara/cad/kicad/schematic.py
blob: 0fce9adb298331943702739b74ef0a3b8185b578 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
"""
Library for handling KiCad's schematic files (`*.kicad_sch`).
"""

import math
import string
from pathlib import Path
from dataclasses import field, KW_ONLY
from itertools import chain
import re
import fnmatch
import os.path
import warnings

from .sexp import *
from .base_types import *
from .primitives import *
from .symbols import Symbol
from . import graphical_primitives as gr

from .. import primitives as cad_pr

from ... import graphic_primitives as gp
from ... import graphic_objects as go
from ... import apertures as ap
from ...layers import LayerStack
from ...newstroke import Newstroke
from ...utils import MM, rotate_point, Tag, setup_svg
from .schematic_colors import *


KICAD_PAPER_SIZES = {
    'A5': (210,   148),
    'A4': (297,   210),
    'A3': (420,   297),
    'A2': (594,   420),
    'A1': (841,   594),
    'A0': (1189,  841),
    'A': (11*25.4, 8.5*25.4),
    'B': (17*25.4, 11*15.4),
    'C': (22*25.4, 17*25.4),
    'D': (34*25.4, 22*25.4),
    'E': (44*25.4, 34*25.4),
    'USLetter': (11*25.4, 8.5*25.4),
    'USLegal': (14*25.4, 8.5*25.4),
    'USLedger': (17*25.4, 11*25.4),
    }

@sexp_type('path')
class SheetPath:
    path: str = '/'
    page: Named(str) = '1'


@sexp_type('junction')
class Junction:
    at: Rename(XYCoord) = field(default_factory=XYCoord)
    diameter: Named(float) = 0
    color: Color = field(default_factory=lambda: Color(0, 0, 0, 0))
    uuid: UUID = field(default_factory=UUID)

    def bounding_box(self, default=None):
        r = (self.diameter/2 or 0.5)
        return (self.at.x - r, self.at.y - r), (self.at.x + r, self.at.y + r)
    
    def to_svg(self, colorscheme=Colorscheme.KiCad):
        yield Tag('circle', cx=f'{self.at.x:.3f}', cy=f'{self.at.y:.3f}', r=(self.diameter/2 or 0.5),
                   fill=self.color.svg(colorscheme.wire))


@sexp_type('no_connect')
class NoConnect:
    at: Rename(XYCoord) = field(default_factory=XYCoord)
    uuid: UUID = field(default_factory=UUID)

    def bounding_box(self, default=None):
        r = 0.635
        return (self.at.x - r, self.at.y - r), (self.at.x + r, self.at.y + r)

    def to_svg(self, colorscheme=Colorscheme.KiCad):
        r = 0.635
        x, y = self.at.x, self.at.y
        yield Tag('path', d=f'M {x-r:.3f} {y-r:.3f} L {x+r:.3f} {y+r:.3f} M {x-r:.3f} {y+r:.3f} L {x+r:.3f} {y-r:.3f}',
                   fill='none', stroke_width='0.254', stroke=colorscheme.no_connect)


@sexp_type('bus_entry')
class BusEntry:
    at: AtPos = field(default_factory=AtPos)
    size: Rename(XYCoord) = field(default_factory=lambda: XYCoord(2.54, 2.54))
    stroke: Stroke = field(default_factory=Stroke)
    uuid: UUID = field(default_factory=UUID)

    def bounding_box(self, default=None):
        r = math.hypot(self.size.x, self.size.y)
        x1, y1 = self.at.x, self.at.y
        x2, y2 = rotate_point(x1+r, y1+r, self.at.rotation or 0)
        x1, x2 = min(x1, x2), max(x1, x2)
        y1, y2 = min(y1, y2), max(y1, y2)

        r = (self.stroke.width or 0.254) / 2
        return (x1-r, y1-r), (x2+r, y2+r)

    def to_svg(self, colorscheme=Colorscheme.KiCad):
        yield Tag('path', d='M {self.at.x} {self.at.y} l {self.size.x} {self.size.y}',
                   transform=f'rotate({self.at.rotation or 0})',
                   fill='none', stroke=self.stroke.svg_color(colorscheme.bus), width=self.stroke.width or '0.254')


def _polyline_svg(self, default_color):
    da = Dasher(self)
    if len(self.points.xy) < 2:
        warnings.warn(f'Schematic {type(self)} with less than two points')

    p0, *rest = self.points.xy
    da.move(p0.x, p0.y)
    for pn in rest:
        da.line(pn.x, pn.y)

    return da.svg(stroke=self.stroke.svg_color(default_color))


def _polyline_bounds(self):
    x1 = min(pt.x for pt in self.points)
    y1 = min(pt.y for pt in self.points)
    x2 = max(pt.x for pt in self.points)
    y2 = max(pt.y for pt in self.points)

    r = (self.stroke.width or 0.254) / 2
    return (x1-r, y1-r), (x2+r, y2+r)


@sexp_type('wire')
class Wire:
    points: PointList = field(default_factory=PointList)
    stroke: Stroke = field(default_factory=Stroke)
    uuid: UUID = field(default_factory=UUID)

    def bounding_box(self, default=None):
        return _polyline_bounds(self)

    def to_svg(self, colorscheme=Colorscheme.KiCad):
        yield _polyline_svg(self, colorscheme.wire)


@sexp_type('bus')
class Bus:
    points: PointList = field(default_factory=PointList)
    stroke: Stroke = field(default_factory=Stroke)
    uuid: UUID = field(default_factory=UUID)

    def bounding_box(self, default=None):
        return _polyline_bounds(self)

    def to_svg(self, colorscheme=Colorscheme.KiCad):
        yield _polyline_svg(self, colorscheme.bus)


@sexp_type('polyline')
class Polyline:
    points: PointList = field(default_factory=PointList)
    stroke: Stroke = field(default_factory=Stroke)
    uuid: UUID = field(default_factory=UUID)

    def bounding_box(self, default=None):
        return _polyline_bounds(self)

    def to_svg(self, colorscheme=Colorscheme.KiCad):
        yield _polyline_svg(self, colorscheme.lines)


@sexp_type('text')
class Text(TextMixin):
    text: str = ''
    exclude_from_sim: Named(YesNoAtom()) = True
    at: AtPos = field(default_factory=AtPos)
    effects: TextEffect = field(default_factory=TextEffect)
    uuid: UUID = field(default_factory=UUID)

    def to_svg(self, colorscheme=Colorscheme.KiCad):
        yield from TextMixin.to_svg(self, colorscheme.text)


@sexp_type('label')
class LocalLabel(TextMixin):
    text: str = ''
    at: AtPos = field(default_factory=AtPos)
    fields_autoplaced: Wrap(Flag()) = False
    effects: TextEffect = field(default_factory=TextEffect)
    uuid: UUID = field(default_factory=UUID)

    @property
    def _text_offset(self):
        return (0, -2*self.line_width)

    def to_svg(self, colorscheme=Colorscheme.KiCad):
        yield from TextMixin.to_svg(self, colorscheme.text)


def label_shape_path_d(shape, w, h):
    l, r = {
        Atom.input: '<]',
        Atom.output: '[>',
        Atom.bidirectional: '<>',
        Atom.tri_state: '<>',
        Atom.passive: '[]'}.get(shape, '<]')
    r = h/2

    if l == '[':
        d = f'M {r:.3f} {r:.3f} L 0 {r:.3f} L 0 {-r:.3f} L {r:.3f} {-r:.3f}'
    else:
        d = f'M {r:.3f} {r:.3f} L 0 0 L {r:.3f} {-r:.3f}'

    e = w+r
    d += f' L {e:.3f} {-r:.3f}'

    if l == '[':
        return d + f'L {e+r:.3f} {-r:.3f} L {e+r:.3f} {r:.3f} L {e:.3f} {r:.3f} Z'
    else:
        return d + f'L {e+r:.3f} {0:.3f} L {e:.3f} {r:.3f} Z'


@sexp_type('global_label')
class GlobalLabel(TextMixin):
    text: str = ''
    shape: Named(AtomChoice(Atom.input, Atom.output, Atom.bidirectional, Atom.tri_state, Atom.passive)) = Atom.input
    at: AtPos = field(default_factory=AtPos)
    fields_autoplaced: Wrap(Flag()) = False
    effects: TextEffect = field(default_factory=TextEffect)
    uuid: UUID = field(default_factory=UUID)
    properties: List(Property) = field(default_factory=list)

    def to_svg(self, colorscheme=Colorscheme.KiCad):
        text = super(TextMixin, self).to_svg(colorscheme.text),
        text.attrs['transform'] = f'translate({self.size*0.6:.3f} 0)'
        (x1, y1), (x2, y2) = self.bounding_box()
        frame = Tag('path', fill='none', stroke_width=0.254, stroke=colorscheme.lines,
            d=label_shape_path_d(self.shape, self.size*0.2 + y2-y1, self.size*1.2 + 0.254))
        yield Tag('g', children=[frame, text])


@sexp_type('hierarchical_label')
class HierarchicalLabel(TextMixin):
    text: str = ''
    shape: Named(AtomChoice(Atom.input, Atom.output, Atom.bidirectional, Atom.tri_state, Atom.passive)) = Atom.input
    at: AtPos = field(default_factory=AtPos)
    fields_autoplaced: Wrap(Flag()) = False
    effects: TextEffect = field(default_factory=TextEffect)
    uuid: UUID = field(default_factory=UUID)

    def to_svg(self, colorscheme=Colorscheme.KiCad):
        text, = TextMixin.to_svg(self, colorscheme.text),
        text.attrs['transform'] = f'translate({self.size*1.2:.3f} 0)'
        frame = Tag('path', fill='none', stroke_width=0.254, stroke=colorscheme.lines,
            d=label_shape_path_d(self.shape, self.size, self.size))
        yield Tag('g', children=[frame, text])


@sexp_type('pin')
class Pin:
    name: str = '1'
    uuid: UUID = field(default_factory=UUID)


# Suddenly, we're doing syntax like this is yaml or something.
@sexp_type('path')
class SymbolCrosslinkSheet:
    path: str = ''
    reference: Named(str) = ''
    unit: Named(int) = 1


@sexp_type('project')
class SymbolCrosslinkProject:
    project_name: str = ''
    instances: List(SymbolCrosslinkSheet) = field(default_factory=list)


@sexp_type('mirror')
class MirrorFlags:
    x: Flag() = False
    y: Flag() = False


@sexp_type('property')
class DrawnProperty(TextMixin):
    key: str = None
    value: str = None
    at: AtPos = field(default_factory=AtPos)
    hide: Flag() = False
    effects: TextEffect = field(default_factory=TextEffect)
    _: SEXP_END = None
    parent: object = None

    def __after_parse__(self, parent=None):
        self.parent = parent

    # Alias value for text mixin
    @property
    def text(self):
        if self.key == 'Reference' and self.parent.unit > 0:
            return f'{self.value}{string.ascii_uppercase[self.parent.unit-1]}'
        else:
            return self.value

    @text.setter
    def text(self, value):
        self.value = value

    @property
    def default_v_align(self):
        return 'middle'

    @property
    def h_align(self):
        align = self.effects.justify.h_str
        if self.rotation in (90, 270):
            align = {'left': 'right', 'right': 'left'}.get(align, align)
        return align

    @property
    def rotation(self):
        rot = self.at.rotation
        rot += getattr(self.parent.at, 'rotation', 0)
        return rot%360

    @property
    def mirrored(self):
        if hasattr(self.parent, 'mirror'):
            return self.parent.mirror.x, self.parent.mirror.y
        return False, False

    def to_svg(self, colorscheme=Colorscheme.KiCad):
        if not self.hide:
            yield from TextMixin.to_svg(self, colorscheme.text)


@sexp_type('symbol')
class SymbolInstance:
    name: str = None
    lib_name: Named(str) = ''
    lib_id: Named(str) = ''
    at: AtPos = field(default_factory=AtPos)
    mirror: OmitDefault(MirrorFlags) = field(default_factory=MirrorFlags)
    unit: Named(int) = 1
    in_bom: Named(YesNoAtom()) = True
    on_board: Named(YesNoAtom()) = True
    dnp: Named(YesNoAtom()) = True
    fields_autoplaced: Wrap(Flag()) = True
    uuid: UUID = field(default_factory=UUID)
    properties: List(DrawnProperty) = field(default_factory=list)
    # AFAICT this property is completely redundant.
    pins: List(Pin) = field(default_factory=list)
    # AFAICT this property, too,  is completely redundant. It ultimately just lists paths and references of at most
    # three other uses of the same symbol in this schematic.
    instances: Named(List(SymbolCrosslinkProject)) = field(default_factory=list)
    _ : SEXP_END = None
    schematic: object = None

    def __after_parse__(self, parent):
        self.schematic = parent

    @property
    def reference(self):
        return self['Reference'].value

    @reference.setter
    def reference(self, value):
        self['Reference'].value = value

    @property
    def value(self):
        return self['Value'].value

    @value.setter
    def value(self, value):
        self['Value'].value = value

    @property
    def footprint(self):
        return self['Footprint'].value

    @footprint.setter
    def footprint(self, value):
        self['Footprint'].value = value

    def __getitem__(self, key):
        for prop in self.properties:
            if prop.key == key:
                return prop

    @property
    def rotation(self):
        return self.at.rotation

    def to_svg(self, colorscheme=Colorscheme.KiCad):
        children = []
        rot = self.at.rotation

        sym = self.schematic.lookup_symbol(self.lib_name, self.lib_id)

        units = [unit for unit in sym.units if unit.unit_global or unit.unit_index == self.unit]

        at_xform = xform = f'translate({self.at.x:.3f} {self.at.y:.3f})'
        if self.mirror.y:
            xform += f'scale(-1 -1)'
        elif self.mirror.x:
            xform += f'scale(1 1)'
        else:
            xform += f'scale(1 -1)'
        if rot:
            xform += f'rotate({rot})'

        children = [foo for unit in units for elem in unit.graphical_elements for foo in elem.to_svg(colorscheme)]
        yield Tag('g', children=children, transform=xform, fill=colorscheme.fill, stroke=colorscheme.lines)

        children = [foo for unit in units for pin in unit.pins for foo in pin.to_svg(colorscheme, self.mirror, rot)]
        yield Tag('g', children=children, transform=at_xform, fill=colorscheme.fill, stroke=colorscheme.lines)

        for prop in self.properties:
            yield from prop.to_svg()


@sexp_type('path')
class SubsheetCrosslinkSheet:
    path: str = ''
    page: Named(str) = ''


@sexp_type('project')
class SubsheetCrosslinkProject:
    project_name: str = ''
    instances: List(SymbolCrosslinkSheet) = field(default_factory=list)


@sexp_type('pin')
class SubsheetPin:
    name: str = '1'
    shape: AtomChoice(Atom.input, Atom.output, Atom.bidirectional, Atom.tri_state, Atom.passive) = Atom.input
    at: AtPos = field(default_factory=AtPos)
    effects: TextEffect = field(default_factory=TextEffect)
    uuid: UUID = field(default_factory=UUID)
    _ : SEXP_END = None
    subsheet: object = None

    def __after_parse__(self, parent):
        self.subsheet = parent

    def to_svg(self):
        size = self.effects.font.size.y or 1.27
        yield Tag('path', fill='none', d=label_shape_path_d(self.shape, 0, size+0.5),
                  transform=f'translate({self.at.x:.3f} {self.at.y:.3f}) rotate({180-self.at.rotation})')

        lx, ly = self.at.x, self.at.y
        dx, dy = rotate_point(-(size+1), 0, math.radians(self.at.rotation))
        lx += dx
        ly += dy
        frot = self.at.rotation
        h_align = 'right'
        if frot == 180:
            frot = 0
            h_align = 'left'

        font = Newstroke.load()
        yield font.render_svg(self.name,
                              size=size,
                              x0=0,
                              y0=0,
                              h_align=h_align,
                              v_align='middle',
                              rotation=-frot,
                              transform=f'translate({lx:.3f} {ly:.3f})',
                              scale=(1, 1),
                              mirror=(False, False),
                              )

@sexp_type('fill')
class SubsheetFill:
    color: Color = field(default_factory=lambda: Color(0, 0, 0, 0))


@sexp_type('sheet')
class Subsheet:
    at: Rename(XYCoord) = field(default_factory=XYCoord)
    size: Rename(XYCoord) = field(default_factory=lambda: XYCoord(2.54, 2.54))
    fields_autoplaced: Wrap(Flag()) = True
    stroke: Stroke = field(default_factory=Stroke)
    fill: SubsheetFill = field(default_factory=SubsheetFill)
    uuid: UUID = field(default_factory=UUID)
    _properties: List(DrawnProperty) = field(default_factory=list)
    pins: List(SubsheetPin) = field(default_factory=list)
    # AFAICT this is completely redundant, just like the one in SymbolInstance
    instances: Named(List(SubsheetCrosslinkProject)) = field(default_factory=list)
    _ : SEXP_END = None
    sheet_name: object = field(default_factory=lambda: DrawnProperty('Sheetname', ''))
    file_name: object = field(default_factory=lambda: DrawnProperty('Sheetfile', ''))
    schematic: object = None

    def __after_parse__(self, parent):
        self.sheet_name, self.file_name = self._properties
        self.schematic = parent

    def __before_sexp__(self):
        self._properties = [self.sheet_name, self.file_name]

    @property
    def rotation(self):
        return 0

    def open(self, search_dir=None, safe=True):
        if search_dir is None:
            if not self.schematic.original_filename:
                raise FileNotFoundError('No search path given and path of parent schematic unknown')
            else:
                search_dir = Path(self.schematic.original_filename).parent
        else:
            search_dir = Path(search_dir)

        resolved = search_dir / self.file_name.value
        if safe and os.path.commonprefix((search_dir.parts, resolved.parts)) != search_dir.parts:
                raise ValueError('Subsheet path traversal to parent directory attempted in Subsheet.open(..., safe=True)')

        return Schematic.open(resolved)

    def to_svg(self, colorscheme=Colorscheme.KiCad):
        children = []

        for prop in self._properties:
            yield from prop.to_svg(colorscheme)

        yield Tag('rect', x=f'{self.at.x:.3f}', y=f'{self.at.y:.3f}',
                  width=f'{self.size.x:.3f}', height=f'{self.size.y:.3f}',
                  **self.stroke.svg_attrs(colorscheme.lines), fill=self.fill.color.svg(colorscheme.fill))

        children = []
        for pin in self.pins:
            children += pin.to_svg()

        #xform = f'translate({self.at.x:.3f} {self.at.y:.3f})'
        yield Tag('g', children=children, #transform=xform,
                  fill=self.fill.color.svg(colorscheme.fill),
                  **self.stroke.svg_attrs(colorscheme.lines))


@sexp_type('lib_symbols')
class LocalLibrary:
    symbols: List(Symbol) = field(default_factory=list)


SUPPORTED_FILE_FORMAT_VERSIONS = [20230620]
@sexp_type('kicad_sch')
class Schematic:
    _version: Named(int, name='version') = 20230620
    generator: Named(Atom) = Atom.gerbonara
    uuid: UUID = field(default_factory=UUID)
    page_settings: PageSettings = field(default_factory=PageSettings)
    # The doc says this is expected, but eeschema barfs when it's there.
    # path: SheetPath = field(default_factory=SheetPath)
    lib_symbols: LocalLibrary = field(default_factory=list)
    junctions: List(Junction) = field(default_factory=list)
    no_connects: List(NoConnect) = field(default_factory=list)
    bus_entries: List(BusEntry) = field(default_factory=list)
    wires: List(Wire) = field(default_factory=list)
    buses: List(Bus) = field(default_factory=list)
    images: List(gr.Image) = field(default_factory=list)
    polylines: List(Polyline) = field(default_factory=list)
    texts: List(Text) = field(default_factory=list)
    local_labels: List(LocalLabel) = field(default_factory=list)
    global_labels: List(GlobalLabel) = field(default_factory=list)
    hierarchical_labels: List(HierarchicalLabel) = field(default_factory=list)
    symbols: List(SymbolInstance) = field(default_factory=list)
    subsheets: List(Subsheet) = field(default_factory=list)
    sheet_instances: Named(List(SubsheetCrosslinkSheet)) = field(default_factory=list)
    _ : SEXP_END = None
    original_filename: str = None

    @property
    def version(self):
        return self._version

    @version.setter
    def version(self, value):
        if value not in SUPPORTED_FILE_FORMAT_VERSIONS:
            raise FormatError(f'File format version {value} is not supported. Supported versions are {", ".join(map(str, SUPPORTED_FILE_FORMAT_VERSIONS))}.')


    def lookup_symbol(self, lib_name, lib_id):
        key = lib_name or lib_id
        for sym in self.lib_symbols.symbols:
            if sym.name == key or sym.raw_name == key:
                return sym
        raise KeyError(f'Symbol with {lib_name=} {lib_id=} not found')

    def write(self, filename=None):
        with open(filename or self.original_filename, 'w') as f:
            f.write(self.serialize())

    def serialize(self):
        return build_sexp(sexp(type(self), self)[0])

    @classmethod
    def open(kls, pcb_file, *args, **kwargs):
        return kls.load(Path(pcb_file).read_text(), *args, **kwargs, original_filename=pcb_file)

    @classmethod
    def load(kls, data, *args, **kwargs):
        return kls.parse(data, *args, **kwargs)

    @property
    def elements(self):
        yield from self.subsheets
        yield from self.images
        yield from self.polylines
        yield from self.symbols
        yield from self.junctions
        yield from self.no_connects
        yield from self.bus_entries
        yield from self.wires
        yield from self.buses
        yield from self.texts
        yield from self.local_labels
        yield from self.global_labels
        yield from self.hierarchical_labels

    def to_svg(self, colorscheme=Colorscheme.KiCad):
        children = []
        for elem in self.elements:
            children += elem.to_svg(colorscheme)
        w, h = KICAD_PAPER_SIZES[self.page_settings.page_format]
        return setup_svg(children, ((0, 0), (w, h)))


if __name__ == '__main__':
    import sys
    from ...layers import LayerStack
    sch = Schematic.open(sys.argv[1])
    print('Loaded schematic with', len(sch.wires), 'wires and', len(sch.symbols), 'symbols.')
    for subsh in sch.subsheets:
        subsh = subsh.open()
        print('Loaded sub-sheet with', len(subsh.wires), 'wires and', len(subsh.symbols), 'symbols.')

    sch.write('/tmp/test.kicad_sch')
    Path('/tmp/test.svg').write_text(str(sch.to_svg()))