kopia lustrzana https://github.com/inkstitch/inkstitch
111 wiersze
3.4 KiB
Python
111 wiersze
3.4 KiB
Python
# Authors: see git history
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#
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# Copyright (c) 2010 Authors
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# Licensed under the GNU GPL version 3.0 or later. See the file LICENSE for details.
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from inkex import Path
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from shapely import geometry as shgeo
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from .element import EmbroideryElement, param
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from .validation import ValidationWarning
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from ..i18n import _
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from ..stitch_plan import StitchGroup
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from ..utils import cache
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from ..utils.geometry import Point
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class PolylineWarning(ValidationWarning):
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name = _("Polyline Object")
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description = _("This object is an SVG PolyLine. Ink/Stitch can work with this shape, "
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"but you can't edit it in Inkscape. Convert it to a manual stitch path "
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"to allow editing.")
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steps_to_solve = [
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_("* Select this object."),
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_("* Do Path > Object to Path."),
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_('* Optional: Run the Params extension and check the "manual stitch" box.')
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]
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class Polyline(EmbroideryElement):
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# Handle a <polyline> element, which is treated as a set of points to
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# stitch exactly.
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#
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# <polyline> elements are pretty rare in SVG, from what I can tell.
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# Anything you can do with a <polyline> can also be done with a <p>, and
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# much more.
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#
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# Notably, EmbroiderModder2 uses <polyline> elements when converting from
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# common machine embroidery file formats to SVG. Handling those here lets
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# users use File -> Import to pull in existing designs they may have
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# obtained, for example purchased fonts.
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element_name = "Polyline"
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@property
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@param('polyline', _('Manual stitch along path'), type='toggle', inverse=True)
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def polyline(self):
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return self.get_boolean_param("polyline")
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@property
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def points(self):
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# example: "1,2 0,0 1.5,3 4,2"
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points = self.node.get('points').strip()
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points = points.split(" ")
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points = [[float(coord) for coord in point.split(",")] for point in points]
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return points
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@property
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@cache
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def shape(self):
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return shgeo.LineString(self.points)
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@property
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def path(self):
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# A polyline is a series of connected line segments described by their
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# points. In order to make use of the existing logic for incorporating
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# svg transforms that is in our superclass, we'll convert the polyline
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# to a degenerate cubic superpath in which the bezier handles are on
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# the segment endpoints.
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path = self.node.get_path()
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path = Path(path).to_superpath()
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return path
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@property
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@cache
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def csp(self):
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csp = self.parse_path()
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return csp
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@property
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def color(self):
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# EmbroiderModder2 likes to use the `stroke` property directly instead
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# of CSS.
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return self.get_style("stroke", "#000000")
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@property
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def stitches(self):
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# For a <polyline>, we'll stitch the points exactly as they exist in
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# the SVG, with no stitch spacing interpolation, flattening, etc.
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# See the comments in the parent class's parse_path method for a
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# description of the CSP data structure.
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stitches = [point for handle_before, point, handle_after in self.csp[0]]
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return stitches
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def validation_warnings(self):
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yield PolylineWarning(self.points[0])
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def to_stitch_groups(self, last_patch):
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patch = StitchGroup(color=self.color)
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for stitch in self.stitches:
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patch.add_stitch(Point(*stitch))
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return [patch]
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