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# Authors: see git history
#
# Copyright (c) 2010 Authors
# Licensed under the GNU GPL version 3.0 or later. See the file LICENSE for details.
import inkex
from ..elements import SatinColumn, Stroke
from ..i18n import _
from ..svg.tags import ORIGINAL_D, PATH_EFFECT, SODIPODI_NODETYPES
from .base import InkstitchExtension
class StrokeToLpeSatin(InkstitchExtension):
"""Convert a satin column into a running stitch."""
def __init__(self, *args, **kwargs):
InkstitchExtension.__init__(self, *args, **kwargs)
self.arg_parser.add_argument("--lpe_satin", type=str, default=None)
self.arg_parser.add_argument("--options", type=str, default=None)
self.arg_parser.add_argument("--info", type=str, default=None)
self.arg_parser.add_argument("-p", "--pattern", type=str, default="normal", dest="pattern")
self.arg_parser.add_argument("-i", "--min-width", type=float, default=1.5, dest="min_width")
self.arg_parser.add_argument("-a", "--max-width", type=float, default=7, dest="max_width")
self.arg_parser.add_argument("-l", "--length", type=float, default=15, dest="length")
self.arg_parser.add_argument("-t", "--stretched", type=inkex.Boolean, default=False, dest="stretched")
self.arg_parser.add_argument("-r", "--rungs", type=inkex.Boolean, default=False, dest="add_rungs")
self.arg_parser.add_argument("-s", "--path-specific", type=inkex.Boolean, default=True, dest="path_specific")
def effect(self):
if not self.svg.selection or not self.get_elements():
inkex.errormsg(_("Please select at least one stroke."))
return
if not any((isinstance(item, Stroke) or isinstance(item, SatinColumn)) for item in self.elements):
# L10N: Convert To Satin extension, user selected one or more objects that were not lines.
inkex.errormsg(_("Please select at least one stroke to convert to a satin column."))
return
pattern = self.options.pattern
if pattern not in satin_patterns:
inkex.errormsg(_("Could not find the specified pattern."))
return
# convert user input values to the units of the current svg
min_width = inkex.units.convert_unit(str(max(self.options.min_width, 0.5)) + 'mm', self.svg.unit)
max_width = inkex.units.convert_unit(str(max(self.options.max_width, 0.5)) + 'mm', self.svg.unit)
length = inkex.units.convert_unit(str(self.options.length) + 'mm', self.svg.unit)
# get pattern path and nodetypes
pattern_obj = satin_patterns[pattern]
pattern_path = pattern_obj.get_path(self.options.add_rungs, min_width, max_width, length, self.svg.unit)
pattern_node_type = pattern_obj.node_types
if not self.options.path_specific:
lpe = self._create_lpe_element(pattern, pattern_path, pattern_node_type)
for element in self.elements:
if self.options.path_specific:
lpe = self._create_lpe_element(pattern, pattern_path, pattern_node_type, element)
if isinstance(element, SatinColumn):
self._process_satin_column(element, lpe)
elif isinstance(element, Stroke):
self._process_stroke(element, lpe)
def _create_lpe_element(self, pattern, pattern_path, pattern_node_type, element=None):
# define id for the lpe path
if not element:
lpe_id = f'inkstitch-effect-{pattern}'
else:
lpe_id = f'inkstitch-effect-{pattern}-{element.id}'
# it is possible, that there is already a path effect with this id, if so, use it
previous_lpe = self.svg.getElementById(lpe_id)
if previous_lpe is not None:
return previous_lpe
# the lpe 'pattern along path' has two options to repeat the pattern, get user input
copy_type = 'repeated' if self.options.stretched is False else 'repeated_stretched'
lpe = inkex.PathEffect(attrib={'id': lpe_id,
'effect': "skeletal",
'is_visible': "true",
'lpeversion': "1",
'pattern': pattern_path,
'copytype': copy_type,
'prop_scale': "1",
'scale_y_rel': "false",
'spacing': "0",
'normal_offset': "0",
'tang_offset': "0",
'prop_units': "false",
'vertical_pattern': "false",
'hide_knot': "false",
'fuse_tolerance': "0.02",
'pattern-nodetypes': pattern_node_type})
# add the path effect element to the defs section
self.svg.defs.add(lpe)
return lpe
def _process_stroke(self, element, lpe):
element = self._ensure_path_element(element, lpe)
previous_effects = element.node.get(PATH_EFFECT, None)
if not previous_effects:
element.node.set(PATH_EFFECT, lpe.get_id(as_url=1))
element.node.set(ORIGINAL_D, element.node.get('d', ''))
else:
url = previous_effects + ';' + lpe.get_id(as_url=1)
element.node.set(PATH_EFFECT, url)
element.node.pop('d')
element.set_param('satin_column', 'true')
element.node.style['stroke-width'] = self.svg.viewport_to_unit('0.756')
def _ensure_path_element(self, element, lpe):
# elements other than paths (rectangle, circles, etc.) can be handled by inkscape for lpe
# but they are way easier to handle for us if we turn them into paths
if element.node.TAG == 'path':
return element
path_element = element.node.to_path_element()
parent = element.node.getparent()
parent.replace(element.node, path_element)
return Stroke(path_element)
def _process_satin_column(self, element, lpe):
current_effects = element.node.get(PATH_EFFECT, None)
# there are possibly multiple path effects, let's check if inkstitch-effect is among them
if not current_effects or 'inkstitch-effect' not in current_effects:
# it wouldn't make sense to apply it to a normal satin column without the inkstitch-effect
inkex.errormsg(_('Cannot convert a satin column into a live path effect satin. Please select a stroke.'))
return
# isolate get the inkstitch effect
current_effects = current_effects.split(';')
inkstitch_effect_position = [i for i, effect in enumerate(current_effects) if 'inkstitch-effect' in effect][0]
inkstitch_effect = current_effects[inkstitch_effect_position][1:]
# get the path effect element
old_effect_element = self.svg.getElementById(inkstitch_effect)
# remove the old inkstitch-effect if it is path specific
if inkstitch_effect.endswith(element.id):
old_effect_element.getparent().remove(old_effect_element)
# update path effect link
current_effects[inkstitch_effect_position] = lpe.get_id(as_url=1)
element.node.set(PATH_EFFECT, ';'.join(current_effects))
element.node.pop('d')
class SatinPattern:
def __init__(self, path=None, node_types=None, flip=True, rung_node=1):
self.path: str = path
self.node_types: str = node_types
self.flip: bool = flip
self.rung_node: int = rung_node
def get_path(self, add_rungs, min_width, max_width, length, to_unit):
# scale the pattern path to fit the unit of the current svg
scale_factor = scale_factor = 1 / inkex.units.convert_unit('1mm', f'{to_unit}')
pattern_path = inkex.Path(self.path).transform(inkex.Transform(f'scale({scale_factor})'), True)
# create a path element
el1 = inkex.PathElement(attrib={'d': str(pattern_path),
SODIPODI_NODETYPES: self.node_types})
# transform to fit user input size values
bbox = el1.bounding_box()
scale_x = length / max(bbox.width, 0.1)
if bbox.height == 0:
scale_y = 1
else:
scale_y = (max_width - min_width) / (bbox.height * 2)
el1.transform = inkex.Transform(f'scale({scale_x}, {scale_y})')
el1.apply_transform()
path1 = el1.get_path()
# copy first path and (optionally) flip it to generate the second satin rail
el2 = el1.copy()
if self.flip:
el2.transform = inkex.Transform(f'scale(1, -1) translate(0, {min_width})')
else:
el2.transform = inkex.Transform(f'translate(0, {-min_width})')
el2.apply_transform()
path2 = el2.get_path()
# setup a rung
point1 = list(path1.end_points)[self.rung_node]
point2 = list(path2.end_points)[self.rung_node]
rungs = ''
if add_rungs:
rungs = f' M {point1[0]} {point1[1] + 0.1} L {point2[0]} {point2[1] - 0.2}'
return str(path1) + str(path2) + rungs
satin_patterns = {'normal': SatinPattern('M 0,0.4 H 4 H 8', 'cc'),
'pearl': SatinPattern('M 0,0 C 0,0.22 0.18,0.4 0.4,0.4 0.62,0.4 0.8,0.22 0.8,0', 'csc'),
'diamond': SatinPattern('M 0,0 0.4,0.2 0.8,0', 'ccc'),
'triangle': SatinPattern('M 0,0 0.4,0.1 0.8,0.2 0.81,0', 'cccc'),
'square': SatinPattern('M 0,0 H 0.2 0.4 L 0.402,0.2 H 0.798 L 0.8,0', 'ccccc'),
'wave': SatinPattern('M 0,0 C 0.2,0.01 0.29,0.2 0.4,0.2 0.51,0.2 0.58,0.01 0.8,0', 'cac'),
'arch': SatinPattern('M 0,0.25 C 0,0.25 0.07,0.05 0.4,0.05 0.7,0.05 0.8,0.25 0.8,0.25', 'czcczc', False)}
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