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from lib.elements import Clone, EmbroideryElement
from lib.svg.tags import INKSTITCH_ATTRIBS, SVG_RECT_TAG
from inkex import SvgDocumentElement, Rectangle, Circle, Group, Use, Transform, TextElement
from inkex.tester import TestCase
from inkex.tester.svg import svg
from typing import Optional
from math import sqrt
def element_fill_angle(element: EmbroideryElement) -> Optional[float]:
angle = element.node.get(INKSTITCH_ATTRIBS['angle'])
if angle is not None:
angle = float(angle)
return angle
class CloneElementTest(TestCase):
def assertAngleAlmostEqual(self, a, b):
# Take the mod 180 of the returned angles, because e.g. -130deg and 50deg produce fills along the same angle.
# We have to use a precision of 4 decimal digits because of the precision of the matrices as they are stored in the svg trees
# generated by these tests.
self.assertAlmostEqual(a % 180, b % 180, 4)
def test_not_embroiderable(self):
root: SvgDocumentElement = svg()
text = root.add(TextElement())
text.text = "Can't embroider this!"
use = root.add(Use())
use.href = text
clone = Clone(use)
stitch_groups = clone.to_stitch_groups(None)
self.assertEqual(len(stitch_groups), 0)
# These tests make sure the element cloning works as expected, using the `clone_elements` method.
def test_basic(self):
root: SvgDocumentElement = svg()
rect = root.add(Rectangle(attrib={
"width": "10",
"height": "10",
INKSTITCH_ATTRIBS["angle"]: "30"
}))
use = root.add(Use())
use.href = rect
clone = Clone(use)
with clone.clone_elements() as elements:
self.assertEqual(len(elements), 1)
self.assertAlmostEqual(element_fill_angle(elements[0]), 30)
def test_angle_rotated(self):
root: SvgDocumentElement = svg()
rect = root.add(Rectangle(attrib={
"width": "10",
"height": "10",
INKSTITCH_ATTRIBS["angle"]: "30"
}))
use = root.add(Use())
use.href = rect
use.set('transform', Transform().add_rotate(20))
clone = Clone(use)
with clone.clone_elements() as elements:
self.assertEqual(len(elements), 1)
self.assertAngleAlmostEqual(element_fill_angle(elements[0]), 10)
def test_angle_flipped(self):
root: SvgDocumentElement = svg()
rect = root.add(Rectangle(attrib={
"width": "10",
"height": "10",
INKSTITCH_ATTRIBS["angle"]: "30"
}))
use = root.add(Use())
use.href = rect
use.set('transform', Transform().add_scale(-1, 1))
clone = Clone(use)
with clone.clone_elements() as elements:
self.assertEqual(len(elements), 1)
self.assertAngleAlmostEqual(element_fill_angle(elements[0]), -30)
def test_angle_flipped_rotated(self):
root: SvgDocumentElement = svg()
rect = root.add(Rectangle(attrib={
"width": "10",
"height": "10",
INKSTITCH_ATTRIBS["angle"]: "30"
}))
use = root.add(Use())
use.href = rect
use.set('transform', Transform().add_rotate(20).add_scale(-1, 1))
clone = Clone(use)
with clone.clone_elements() as elements:
self.assertEqual(len(elements), 1)
# Fill angle goes from 30 -> -30 after flip -> -50 after rotate
self.assertAngleAlmostEqual(element_fill_angle(elements[0]), -50)
def test_angle_non_uniform_scale(self):
"""
The angle isn't *as* well-defined for non-rotational scales, but we try to follow how the slope will be altered.
"""
root: SvgDocumentElement = svg()
rect = root.add(Rectangle(attrib={
"width": "10",
"height": "10",
INKSTITCH_ATTRIBS["angle"]: "30"
}))
use = root.add(Use())
use.href = rect
use.set('transform', Transform().add_rotate(10).add_scale(1, -sqrt(3)))
clone = Clone(use)
with clone.clone_elements() as elements:
self.assertEqual(len(elements), 1)
# Slope of the stitching goes from tan(30deg) = 1/sqrt(3) to -sqrt(3)/sqrt(3) = tan(-45deg),
# then rotated another -10 degrees to -55
self.assertAngleAlmostEqual(element_fill_angle(elements[0]), -55)
def test_angle_inherits_down_tree(self):
"""
The stitching angle of a clone is based in part on the relative transforms of the source and clone.
"""
root: SvgDocumentElement = svg()
g1 = root.add(Group())
g1.set('transform', Transform().add_rotate(3))
rect = g1.add(Rectangle(attrib={
"width": "10",
"height": "10",
INKSTITCH_ATTRIBS["angle"]: "30"
}))
g2 = root.add(Group())
g2.set('transform', Transform().add_translate((20, 0)).add_rotate(-7))
use = g2.add(Use())
use.href = rect
use.set('transform', Transform().add_rotate(11))
clone = Clone(use)
with clone.clone_elements() as elements:
self.assertEqual(len(elements), 1)
# Angle goes from 30 -> 40 (g1 -> g2) -> 29 (use)
self.assertAngleAlmostEqual(element_fill_angle(elements[0]), 29)
def test_transform_inherits_from_cloned_element(self):
"""
Elements cloned by cloned_elements need to inherit their transform from their href'd element and their use to match what's shown.
"""
root: SvgDocumentElement = svg()
rect = root.add(Rectangle(attrib={
"width": "10",
"height": "10",
INKSTITCH_ATTRIBS["angle"]: "30",
}))
rect.set('transform', Transform().add_scale(2, 2))
use = root.add(Use())
use.href = rect
use.set('transform', Transform().add_translate((5, 10)))
clone = Clone(use)
with clone.clone_elements() as elements:
self.assertEqual(len(elements), 1)
self.assertTransformEqual(
elements[0].node.composed_transform(),
Transform().add_translate((5, 10)).add_scale(2, 2))
def test_transform_inherits_from_tree(self):
root: SvgDocumentElement = svg()
g1 = root.add(Group())
g1.set('transform', Transform().add_translate((0, 5)).add_rotate(5))
rect = g1.add(Rectangle(attrib={
"width": "10",
"height": "10",
INKSTITCH_ATTRIBS["angle"]: "30",
}))
rect.set('transform', Transform().add_scale(2, 2))
use = root.add(Use())
use.href = g1
use.set('transform', Transform().add_translate((5, 10)))
clone = Clone(use)
with clone.clone_elements() as elements:
self.assertEqual(len(elements), 1)
self.assertTransformEqual(
elements[0].node.composed_transform(),
Transform().add_translate((5, 10)) # use
.add_translate((0, 5)).add_rotate(5) # g1
.add_scale(2, 2), # rect
5)
def test_transform_inherits_from_tree_up_tree(self):
root: SvgDocumentElement = svg()
g1 = root.add(Group())
g1.set('transform', Transform().add_translate((0, 5)).add_rotate(5))
rect = g1.add(Rectangle(attrib={
"width": "10",
"height": "10",
INKSTITCH_ATTRIBS["angle"]: "30",
}))
rect.set('transform', Transform().add_scale(2, 2))
circ = g1.add(Circle())
circ.radius = 5
g2 = root.add(Group())
g2.set('transform', Transform().add_translate((1, 2)).add_scale(0.5, 1))
use = g2.add(Use())
use.href = g1
use.set('transform', Transform().add_translate((5, 10)))
clone = Clone(use)
with clone.clone_elements() as elements:
self.assertEqual(len(elements), 2)
self.assertTransformEqual(
elements[0].node.composed_transform(),
Transform().add_translate((1, 2)).add_scale(0.5, 1) # g2
.add_translate((5, 10)) # use
.add_translate((0, 5)).add_rotate(5) # g1
.add_scale(2, 2), # rect
5)
self.assertTransformEqual(
elements[1].node.composed_transform(),
Transform().add_translate((1, 2)).add_scale(0.5, 1) # g2
.add_translate((5, 10)) # use
.add_translate((0, 5)).add_rotate(5), # g1
5)
def test_clone_fill_angle_not_specified(self):
root: SvgDocumentElement = svg()
rect = root.add(Rectangle(attrib={
"width": "10",
"height": "10",
INKSTITCH_ATTRIBS["angle"]: "30"
}))
use = root.add(Use())
use.href = rect
use.set('transform', Transform().add_rotate(20))
clone = Clone(use)
self.assertEqual(clone.clone_fill_angle, None)
def test_clone_fill_angle(self):
root: SvgDocumentElement = svg()
rect = root.add(Rectangle(attrib={
"width": "10",
"height": "10",
INKSTITCH_ATTRIBS["angle"]: "30"
}))
use = root.add(Use())
use.href = rect
use.set(INKSTITCH_ATTRIBS["angle"], 42)
use.set('transform', Transform().add_rotate(20))
clone = Clone(use)
self.assertEqual(clone.clone_fill_angle, 42)
with clone.clone_elements() as elements:
self.assertEqual(len(elements), 1)
self.assertAngleAlmostEqual(element_fill_angle(elements[0]), 42)
def test_angle_manually_flipped(self):
root: SvgDocumentElement = svg()
rect = root.add(Rectangle(attrib={
"width": "10",
"height": "10",
INKSTITCH_ATTRIBS["angle"]: "30"
}))
use = root.add(Use())
use.href = rect
use.set('transform', Transform().add_rotate(20))
use.set(INKSTITCH_ATTRIBS["flip_angle"], True)
clone = Clone(use)
self.assertTrue(clone.flip_angle)
with clone.clone_elements() as elements:
self.assertEqual(len(elements), 1)
self.assertAngleAlmostEqual(element_fill_angle(elements[0]), -10)
def test_recursive_uses(self):
root: SvgDocumentElement = svg()
g1 = root.add(Group())
rect = g1.add(Rectangle(attrib={
"width": "10",
"height": "10",
}))
u1 = g1.add(Use())
u1.set('transform', Transform().add_translate((20, 0)))
u1.href = rect
u2 = root.add(Use())
u2.set('transform', Transform().add_translate((0, 20)).add_scale(0.5, 0.5))
u2.href = g1
u3 = root.add(Use())
u3.set('transform', Transform().add_translate((0, 30)))
u3.href = u2
clone = Clone(u3)
with clone.clone_elements() as elements:
# There should be two elements cloned from u3, two rects, one corresponding to rect and one corresponding to u1.
# Their transforms should derive from the elements they href.
self.assertEqual(len(elements), 2)
self.assertEqual(elements[0].node.tag, SVG_RECT_TAG)
self.assertTransformEqual(elements[0].node.composed_transform(),
Transform().add_translate((0, 30)) # u3
.add_translate(0, 20).add_scale(0.5, 0.5) # u2
)
self.assertEqual(elements[1].node.tag, SVG_RECT_TAG)
self.assertTransformEqual(elements[1].node.composed_transform(),
Transform().add_translate((0, 30)) # u3
.add_translate((0, 20)).add_scale(0.5, 0.5) # u2
.add_translate((20, 0)) # u1
)
def test_recursive_uses_angle(self):
root: SvgDocumentElement = svg()
rect = root.add(Rectangle(attrib={
"width": "10",
"height": "10",
INKSTITCH_ATTRIBS["angle"]: "30"
}))
u1 = root.add(Use())
u1.set('transform', Transform().add_rotate(60))
u1.href = rect
g = root.add(Group())
g.set('transform', Transform().add_rotate(-10))
u2 = g.add(Use())
u2.href = u1
u3 = root.add(Use())
u3.set('transform', Transform().add_rotate(7))
u3.href = g
clone = Clone(u3)
with clone.clone_elements() as elements:
self.assertEqual(len(elements), 1)
# Angle goes from 30 -> -30 (u1) -> -20 (g -> u2) -> -27 (u3)
self.assertAngleAlmostEqual(element_fill_angle(elements[0]), -27)
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