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#!/usr/bin/env python
# coding=utf-8
#
# Copyright (C) 2022 Jonathan Neuhauser (jonathan.neuhauser@outlook.com)
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
"""Parser for HP/GL2 Documents (includes ordinary HPGL)"""
import pyparsing as pp
from inkex.base import SvgOutputMixin
import inkex
from inkex.localization import inkex_gettext as _
from hpgl_input_sm import HPGLStateMachine
from hpgl_parser import build_parser
class Hpgl2Input(inkex.InputExtension):
"""InputExtension to import HP/GL2 documents."""
def add_arguments(self, pars):
pars.add_argument(
"--width", type=float, default=8, help="Width of the picture frame [in]"
)
pars.add_argument(
"--height", type=float, default=10, help="Height of the picture frame [in]"
)
pars.add_argument(
"--resolution", type=float, default=1016.0, help="Resolution (plu/in)"
)
pars.add_argument(
"--bake-transforms",
type=inkex.Boolean,
default=True,
help=(
"Bake transforms"
"(disabling is helpful for debugging IP/IR/SC commands)"
),
)
pars.add_argument(
"--break-apart",
type=inkex.Boolean,
default=True,
help="Break apart subpaths",
)
def load(self, stream):
"""Load the document, making sure that we operate on a decoded string"""
res = stream.read()
if isinstance(res, str):
return res
return res.decode()
def effect(self):
# interpret HPGL data
doc: inkex.SvgDocumentElement = SvgOutputMixin.get_template(
width=self.options.width * 25.4,
height=self.options.height * 25.4,
unit="mm",
)
layer = doc.getroot().add(inkex.Layer())
plu_to_svg = inkex.Transform(
scale=(
0.025 / self.options.resolution * 1016,
-0.025 / self.options.resolution * 1016,
),
translate=(0, self.options.height * 25.4),
)
layer.transform = plu_to_svg
document_parser = build_parser(HPGLStateMachine(layer, self.options))
try:
result = document_parser.parse_string(self.document, parse_all=True)
# bake in the transforms
if self.options.bake_transforms:
layer.bake_transforms_recursively()
unknown = result.get("u")
if unknown:
inkex.errormsg(
_(
"Unsupported commands encountered. "
"The following commands were ignored:"
)
)
inkex.errormsg(unknown)
except pp.ParseException as parse_err:
inkex.errormsg(parse_err.explain())
# deliver document to inkscape
self.document = doc
if __name__ == "__main__":
Hpgl2Input().run()
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