from fontTools.pens.recordingPen import RecordingPen
from fontTools.svgLib import parse_path
import pytest
@pytest.mark.parametrize(
"pathdef, expected",
[
# Examples from the SVG spec
(
"M 100 100 L 300 100 L 200 300 z",
[
("moveTo", ((100.0, 100.0),)),
("lineTo", ((300.0, 100.0),)),
("lineTo", ((200.0, 300.0),)),
("lineTo", ((100.0, 100.0),)),
("closePath", ()),
]
),
# for Z command behavior when there is multiple subpaths
(
"M 0 0 L 50 20 M 100 100 L 300 100 L 200 300 z",
[
("moveTo", ((0.0, 0.0),)),
("lineTo", ((50.0, 20.0),)),
("endPath", ()),
("moveTo", ((100.0, 100.0),)),
("lineTo", ((300.0, 100.0),)),
("lineTo", ((200.0, 300.0),)),
("lineTo", ((100.0, 100.0),)),
("closePath", ()),
]
),
(
"M100,200 C100,100 250,100 250,200 S400,300 400,200",
[
("moveTo", ((100.0, 200.0),)),
("curveTo", ((100.0, 100.0),
(250.0, 100.0),
(250.0, 200.0))),
("curveTo", ((250.0, 300.0),
(400.0, 300.0),
(400.0, 200.0))),
("endPath", ()),
]
),
(
"M100,200 C100,100 400,100 400,200",
[
("moveTo", ((100.0, 200.0),)),
("curveTo", ((100.0, 100.0),
(400.0, 100.0),
(400.0, 200.0))),
("endPath", ()),
]
),
(
"M100,500 C25,400 475,400 400,500",
[
("moveTo", ((100.0, 500.0),)),
("curveTo", ((25.0, 400.0),
(475.0, 400.0),
(400.0, 500.0))),
("endPath", ()),
]
),
(
"M100,800 C175,700 325,700 400,800",
[
("moveTo", ((100.0, 800.0),)),
("curveTo", ((175.0, 700.0),
(325.0, 700.0),
(400.0, 800.0))),
("endPath", ()),
]
),
(
"M600,200 C675,100 975,100 900,200",
[
("moveTo", ((600.0, 200.0),)),
("curveTo", ((675.0, 100.0),
(975.0, 100.0),
(900.0, 200.0))),
("endPath", ()),
]
),
(
"M600,500 C600,350 900,650 900,500",
[
("moveTo", ((600.0, 500.0),)),
("curveTo", ((600.0, 350.0),
(900.0, 650.0),
(900.0, 500.0))),
("endPath", ()),
]
),
(
"M600,800 C625,700 725,700 750,800 S875,900 900,800",
[
("moveTo", ((600.0, 800.0),)),
("curveTo", ((625.0, 700.0),
(725.0, 700.0),
(750.0, 800.0))),
("curveTo", ((775.0, 900.0),
(875.0, 900.0),
(900.0, 800.0))),
("endPath", ()),
]
),
(
"M200,300 Q400,50 600,300 T1000,300",
[
("moveTo", ((200.0, 300.0),)),
("qCurveTo", ((400.0, 50.0),
(600.0, 300.0))),
("qCurveTo", ((800.0, 550.0),
(1000.0, 300.0))),
("endPath", ()),
]
),
# End examples from SVG spec
# Relative moveto
(
"M 0 0 L 50 20 m 50 80 L 300 100 L 200 300 z",
[
("moveTo", ((0.0, 0.0),)),
("lineTo", ((50.0, 20.0),)),
("endPath", ()),
("moveTo", ((100.0, 100.0),)),
("lineTo", ((300.0, 100.0),)),
("lineTo", ((200.0, 300.0),)),
("lineTo", ((100.0, 100.0),)),
("closePath", ()),
]
),
# Initial smooth and relative curveTo
(
"M100,200 s 150,-100 150,0",
[
("moveTo", ((100.0, 200.0),)),
("curveTo", ((100.0, 200.0),
(250.0, 100.0),
(250.0, 200.0))),
("endPath", ()),
]
),
# Initial smooth and relative qCurveTo
(
"M100,200 t 150,0",
[
("moveTo", ((100.0, 200.0),)),
("qCurveTo", ((100.0, 200.0),
(250.0, 200.0))),
("endPath", ()),
]
),
# relative l command
(
"M 100 100 L 300 100 l -100 200 z",
[
("moveTo", ((100.0, 100.0),)),
("lineTo", ((300.0, 100.0),)),
("lineTo", ((200.0, 300.0),)),
("lineTo", ((100.0, 100.0),)),
("closePath", ()),
]
),
# relative q command
(
"M200,300 q200,-250 400,0",
[
("moveTo", ((200.0, 300.0),)),
("qCurveTo", ((400.0, 50.0),
(600.0, 300.0))),
("endPath", ()),
]
),
# absolute H command
(
"M 100 100 H 300 L 200 300 z",
[
("moveTo", ((100.0, 100.0),)),
("lineTo", ((300.0, 100.0),)),
("lineTo", ((200.0, 300.0),)),
("lineTo", ((100.0, 100.0),)),
("closePath", ()),
]
),
# relative h command
(
"M 100 100 h 200 L 200 300 z",
[
("moveTo", ((100.0, 100.0),)),
("lineTo", ((300.0, 100.0),)),
("lineTo", ((200.0, 300.0),)),
("lineTo", ((100.0, 100.0),)),
("closePath", ()),
]
),
# absolute V command
(
"M 100 100 V 300 L 200 300 z",
[
("moveTo", ((100.0, 100.0),)),
("lineTo", ((100.0, 300.0),)),
("lineTo", ((200.0, 300.0),)),
("lineTo", ((100.0, 100.0),)),
("closePath", ()),
]
),
# relative v command
(
"M 100 100 v 200 L 200 300 z",
[
("moveTo", ((100.0, 100.0),)),
("lineTo", ((100.0, 300.0),)),
("lineTo", ((200.0, 300.0),)),
("lineTo", ((100.0, 100.0),)),
("closePath", ()),
]
),
]
)
def test_parse_path(pathdef, expected):
pen = RecordingPen()
parse_path(pathdef, pen)
assert pen.value == expected
@pytest.mark.parametrize(
"pathdef1, pathdef2",
[
# don't need spaces between numbers and commands
(
"M 100 100 L 200 200",
"M100 100L200 200",
),
# repeated implicit command
(
"M 100 200 L 200 100 L -100 -200",
"M 100 200 L 200 100 -100 -200"
),
# don't need spaces before a minus-sign
(
"M100,200c10-5,20-10,30-20",
"M 100 200 c 10 -5 20 -10 30 -20"
),
# closed paths have an implicit lineTo if they don't
# end on the same point as the initial moveTo
(
"M 100 100 L 300 100 L 200 300 z",
"M 100 100 L 300 100 L 200 300 L 100 100 z"
)
]
)
def test_equivalent_paths(pathdef1, pathdef2):
pen1 = RecordingPen()
parse_path(pathdef1, pen1)
pen2 = RecordingPen()
parse_path(pathdef2, pen2)
assert pen1.value == pen2.value
def test_exponents():
# It can be e or E, the plus is optional, and a minimum of +/-3.4e38 must be supported.
pen = RecordingPen()
parse_path("M-3.4e38 3.4E+38L-3.4E-38,3.4e-38", pen)
expected = [
("moveTo", ((-3.4e+38, 3.4e+38),)),
("lineTo", ((-3.4e-38, 3.4e-38),)),
("endPath", ()),
]
assert pen.value == expected
def test_invalid_implicit_command():
with pytest.raises(ValueError) as exc_info:
parse_path("M 100 100 L 200 200 Z 100 200", RecordingPen())
assert exc_info.match("Unallowed implicit command")
def test_arc_to_cubic_bezier():
pen = RecordingPen()
parse_path("M300,200 h-150 a150,150 0 1,0 150,-150 z", pen)
expected = [
('moveTo', ((300.0, 200.0),)),
('lineTo', ((150.0, 200.0),)),
(
'curveTo',
(
(150.0, 282.842),
(217.157, 350.0),
(300.0, 350.0)
)
),
(
'curveTo',
(
(382.842, 350.0),
(450.0, 282.842),
(450.0, 200.0)
)
),
(
'curveTo',
(
(450.0, 117.157),
(382.842, 50.0),
(300.0, 50.0)
)
),
('lineTo', ((300.0, 200.0),)),
('closePath', ())
]
result = list(pen.value)
assert len(result) == len(expected)
for (cmd1, points1), (cmd2, points2) in zip(result, expected):
assert cmd1 == cmd2
assert len(points1) == len(points2)
for pt1, pt2 in zip(points1, points2):
assert pt1 == pytest.approx(pt2, rel=1e-5)
class ArcRecordingPen(RecordingPen):
def arcTo(self, rx, ry, rotation, arc_large, arc_sweep, end_point):
self.value.append(
("arcTo", (rx, ry, rotation, arc_large, arc_sweep, end_point))
)
def test_arc_pen_with_arcTo():
pen = ArcRecordingPen()
parse_path("M300,200 h-150 a150,150 0 1,0 150,-150 z", pen)
expected = [
('moveTo', ((300.0, 200.0),)),
('lineTo', ((150.0, 200.0),)),
('arcTo', (150.0, 150.0, 0.0, True, False, (300.0, 50.0))),
('lineTo', ((300.0, 200.0),)),
('closePath', ())
]
assert pen.value == expected
@pytest.mark.parametrize(
"path, expected",
[
(
"M1-2A3-4-1.0 01.5.7",
[
("moveTo", ((1.0, -2.0),)),
("arcTo", (3.0, -4.0, -1.0, False, True, (0.5, 0.7))),
("endPath", ()),
],
),
(
"M21.58 7.19a2.51 2.51 0 10-1.77-1.77",
[
("moveTo", ((21.58, 7.19),)),
("arcTo", (2.51, 2.51, 0.0, True, False, (19.81, 5.42))),
("endPath", ()),
],
),
(
"M22 12a25.87 25.87 0 00-.42-4.81",
[
("moveTo", ((22.0, 12.0),)),
("arcTo", (25.87, 25.87, 0.0, False, False, (21.58, 7.19))),
("endPath", ()),
],
),
(
"M0,0 A1.2 1.2 0 012 15.8",
[
("moveTo", ((0.0, 0.0),)),
("arcTo", (1.2, 1.2, 0.0, False, True, (2.0, 15.8))),
("endPath", ()),
],
),
(
"M12 7a5 5 0 105 5 5 5 0 00-5-5",
[
("moveTo", ((12.0, 7.0),)),
("arcTo", (5.0, 5.0, 0.0, True, False, (17.0, 12.0))),
("arcTo", (5.0, 5.0, 0.0, False, False, (12.0, 7.0))),
("endPath", ()),
],
)
],
)
def test_arc_flags_without_spaces(path, expected):
pen = ArcRecordingPen()
parse_path(path, pen)
assert pen.value == expected
@pytest.mark.parametrize(
"path", ["A", "A0,0,0,0,0,0", "A 0 0 0 0 0 0 0 0 0 0 0 0 0"]
)
def test_invalid_arc_not_enough_args(path):
pen = ArcRecordingPen()
with pytest.raises(ValueError, match="Invalid arc command") as e:
parse_path(path, pen)
assert isinstance(e.value.__cause__, ValueError)
assert "Not enough arguments" in str(e.value.__cause__)
def test_invalid_arc_argument_value():
pen = ArcRecordingPen()
with pytest.raises(ValueError, match="Invalid arc command") as e:
parse_path("M0,0 A0,0,0,2,0,0,0", pen)
cause = e.value.__cause__
assert isinstance(cause, ValueError)
assert "Invalid argument for 'large-arc-flag' parameter: '2'" in str(cause)
pen = ArcRecordingPen()
with pytest.raises(ValueError, match="Invalid arc command") as e:
parse_path("M0,0 A0,0,0,0,-2.0,0,0", pen)
cause = e.value.__cause__
assert isinstance(cause, ValueError)
assert "Invalid argument for 'sweep-flag' parameter: '-2.0'" in str(cause)