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from .sexp import *
from .sexp_mapper import *
import time
from dataclasses import field
import math
import uuid
from contextlib import contextmanager
from itertools import cycle
@sexp_type('color')
class Color:
r: int = None
g: int = None
b: int = None
a: int = None
@sexp_type('stroke')
class Stroke:
width: Named(float) = 0.254
type: Named(AtomChoice(Atom.dash, Atom.dot, Atom.dash_dot_dot, Atom.dash_dot, Atom.default, Atom.solid)) = Atom.default
color: Color = None
class Dasher:
def __init__(self, stroke):
self.width = stroke.width
gap = 4*stroke.width
dot = 0
dash = 11*stroke.width
self.pattern = {
Atom.dash: [dash, gap],
Atom.dot: [dot, gap],
Atom.dash_dot_dot: [dash, gap, dot, gap, dot, gap],
Atom.dash_dot: [dash, gap, dot, gap],
Atom.default: [1e99],
Atom.solid: [1e99]}[stroke.type]
self.start_x, self.start_y = None, None
self.cur_x, self.cur_y = None, None
self.segments = []
def move(self, x, y):
if self.cur_x is None:
self.start_x, self.start_y = x, y
self.cur_x, self.cur_y = x, y
def line(self, x, y):
if x is None or y is None:
raise ValueError('line() called before move()')
self.segments.append((self.cur_x, self.cur_y, x, y))
self.cur_x, self.cur_y = x, y
def close(self):
self.segments.append((self.cur_x, self.cur_y, self.start_x, self.start_y))
self.cur_x, self.cur_y = None, None
@staticmethod
def _interpolate(x1, y1, x2, y2, length):
dx, dy = x2-x1, y2-y1
total = math.hypot(dx, dy)
if total == 0:
return x2, y2
frac = length / total
return x1 + dx*frac, y1 + dy*frac
def __iter__(self):
it = iter(self.segments)
segment_remaining, segment_pos = 0, 0
for length, stroked in cycle(zip(self.pattern, cycle([True, False]))):
length = max(1e-12, length)
import sys
print('new dash', length, stroked, file=sys.stderr)
while length > 0:
print(f'{length=} {segment_remaining=}', file=sys.stderr)
if segment_remaining == 0:
try:
x1, y1, x2, y2 = next(it)
except StopIteration:
return
dx, dy = x2-x1, y2-y1
lx, ly = x1, y1
segment_remaining = math.hypot(dx, dy)
segment_pos = 0
print('new segment', x1, y1, x2, y2, segment_remaining, file=sys.stderr)
if segment_remaining > length:
segment_pos += length
ix, iy = self._interpolate(x1, y1, x2, y2, segment_pos)
segment_remaining -= length
if stroked:
yield lx, ly, ix, iy
lx, ly = ix, iy
break
else:
length -= segment_remaining
segment_remaining = 0
if stroked:
yield lx, ly, x2, y2
@sexp_type('xy')
class XYCoord:
x: float = 0
y: float = 0
def isclose(self, other, tol=1e-6):
return math.isclose(self.x, other.x, tol) and math.isclose(self.y, other.y, tol)
@sexp_type('pts')
class PointList:
xy : List(XYCoord) = field(default_factory=list)
@sexp_type('xyz')
class XYZCoord:
x: float = 0
y: float = 0
z: float = 0
@sexp_type('at')
class AtPos(XYCoord):
x: float = 0 # in millimeter
y: float = 0 # in millimeter
rotation: int = 0 # in degrees, can only be 0, 90, 180 or 270.
unlocked: Flag() = False
def __before_sexp__(self):
self.rotation = int(round(self.rotation % 360))
@property
def rotation_rad(self):
return math.radians(self.rotation)
@rotation_rad.setter
def rotation_rad(self, value):
self.rotation = math.degrees(value)
@sexp_type('font')
class FontSpec:
face: Named(str) = None
size: Rename(XYCoord) = field(default_factory=lambda: XYCoord(1.27, 1.27))
thickness: Named(float) = None
bold: Flag() = False
italic: Flag() = False
line_spacing: Named(float) = None
@sexp_type('justify')
class Justify:
h: AtomChoice(Atom.left, Atom.right) = None
v: AtomChoice(Atom.top, Atom.bottom) = None
mirror: Flag() = False
@sexp_type('effects')
class TextEffect:
font: FontSpec = field(default_factory=FontSpec)
justify: OmitDefault(Justify) = field(default_factory=Justify)
hide: Flag() = False
@sexp_type('tstamp')
class Timestamp:
value: str = field(default_factory=uuid.uuid4)
def __after_parse__(self, parent):
self.value = str(self.value)
def before_sexp(self):
self.value = Atom(str(self.value))
def bump(self):
self.value = uuid.uuid4()
@sexp_type('tedit')
class EditTime:
value: str = field(default_factory=time.time)
def __after_parse__(self, parent):
self.value = int(str(self.value), 16)
def __before_sexp__(self):
self.value = Atom(f'{int(self.value):08X}')
def bump(self):
self.value = time.time()
if __name__ == '__main__':
d = Dasher(Stroke(0.01, Atom.dash_dot_dot))
#d = Dasher(Stroke(0.01, Atom.solid))
d.move(1, 1)
d.line(1, 2)
d.line(3, 2)
d.line(3, 1)
d.close()
print('<?xml version="1.0" standalone="no"?>')
print('<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">')
print('<svg version="1.1" width="4cm" height="3cm" viewBox="0 0 4 3" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">')
for x1, y1, x2, y2 in d:
print(f'<path fill="none" stroke="black" stroke-width="0.01" stroke-linecap="round" d="M {x1},{y1} L {x2},{y2}"/>')
print('</svg>')
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