kopia lustrzana https://github.com/inkstitch/inkstitch
393 wiersze
13 KiB
Python
393 wiersze
13 KiB
Python
from copy import deepcopy
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import os
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from random import random
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import sys
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import cubicsuperpath
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import inkex
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from shapely import geometry as shgeo
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import simpletransform
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from .i18n import _, N_
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from .svg import apply_transforms, get_node_transform, get_correction_transform, get_document, generate_unique_id
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from .svg.tags import SVG_DEFS_TAG, SVG_GROUP_TAG, SVG_PATH_TAG, SVG_USE_TAG, SVG_SYMBOL_TAG, \
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CONNECTION_START, CONNECTION_END, CONNECTOR_TYPE, XLINK_HREF, INKSCAPE_LABEL
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from .utils import cache, get_bundled_dir, Point
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COMMANDS = {
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# L10N command attached to an object
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N_("fill_start"): N_("Fill stitch starting position"),
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# L10N command attached to an object
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N_("fill_end"): N_("Fill stitch ending position"),
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# L10N command attached to an object
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N_("satin_start"): N_("Auto-route satin stitch starting position"),
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# L10N command attached to an object
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N_("satin_end"): N_("Auto-route satin stitch ending position"),
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# L10N command attached to an object
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N_("stop"): N_("Stop (pause machine) after sewing this object"),
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# L10N command attached to an object
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N_("trim"): N_("Trim thread after sewing this object"),
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# L10N command attached to an object
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N_("ignore_object"): N_("Ignore this object (do not stitch)"),
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# L10N command attached to an object
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N_("satin_cut_point"): N_("Satin cut point (use with Cut Satin Column)"),
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# L10N command that affects a layer
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N_("ignore_layer"): N_("Ignore layer (do not stitch any objects in this layer)"),
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# L10N command that affects entire document
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N_("origin"): N_("Origin for exported embroidery files"),
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# L10N command that affects entire document
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N_("stop_position"): N_("Jump destination for Stop commands (a.k.a. \"Frame Out position\")."),
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}
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OBJECT_COMMANDS = ["fill_start", "fill_end", "satin_start", "satin_end", "stop", "trim", "ignore_object", "satin_cut_point"]
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LAYER_COMMANDS = ["ignore_layer"]
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GLOBAL_COMMANDS = ["origin", "stop_position"]
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class CommandParseError(Exception):
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pass
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class BaseCommand(object):
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@property
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@cache
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def description(self):
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return get_command_description(self.command)
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def parse_symbol(self):
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if self.symbol.tag != SVG_SYMBOL_TAG:
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raise CommandParseError("use points to non-symbol")
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self.command = self.symbol.get('id')
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if self.command.startswith('inkstitch_'):
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self.command = self.command[10:]
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else:
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raise CommandParseError("symbol is not an Ink/Stitch command")
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def get_node_by_url(self, url):
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# url will be #path12345. Find the corresponding object.
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if url is None:
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raise CommandParseError("url is None")
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if not url.startswith('#'):
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raise CommandParseError("invalid connection url: %s" % url)
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id = url[1:]
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try:
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return self.svg.xpath(".//*[@id='%s']" % id)[0]
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except (IndexError, AttributeError):
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raise CommandParseError("could not find node by url %s" % id)
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class Command(BaseCommand):
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def __init__(self, connector):
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self.connector = connector
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self.svg = self.connector.getroottree().getroot()
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self.parse_command()
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def parse_connector_path(self):
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path = cubicsuperpath.parsePath(self.connector.get('d'))
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return apply_transforms(path, self.connector)
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def parse_command(self):
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path = self.parse_connector_path()
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neighbors = [
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(self.get_node_by_url(self.connector.get(CONNECTION_START)), path[0][0][1]),
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(self.get_node_by_url(self.connector.get(CONNECTION_END)), path[0][-1][1])
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]
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if neighbors[0][0].tag != SVG_USE_TAG:
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neighbors.reverse()
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if neighbors[0][0].tag != SVG_USE_TAG:
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raise CommandParseError("connector does not point to a use tag")
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self.use = neighbors[0][0]
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self.symbol = self.get_node_by_url(neighbors[0][0].get(XLINK_HREF))
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self.parse_symbol()
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self.target = neighbors[1][0]
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self.target_point = neighbors[1][1]
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def __repr__(self):
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return "Command('%s', %s)" % (self.command, self.target_point)
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class StandaloneCommand(BaseCommand):
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def __init__(self, use):
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self.node = use
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self.svg = self.node.getroottree().getroot()
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self.parse_command()
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def parse_command(self):
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self.symbol = self.get_node_by_url(self.node.get(XLINK_HREF))
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if self.symbol.tag != SVG_SYMBOL_TAG:
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raise CommandParseError("use points to non-symbol")
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self.parse_symbol()
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@property
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@cache
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def point(self):
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pos = [float(self.node.get("x", 0)), float(self.node.get("y", 0))]
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transform = get_node_transform(self.node)
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simpletransform.applyTransformToPoint(transform, pos)
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return Point(*pos)
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def get_command_description(command):
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return COMMANDS[command]
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def find_commands(node):
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"""Find the symbols this node is connected to and return them as Commands"""
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# find all paths that have this object as a connection
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xpath = ".//*[@inkscape:connection-start='#%(id)s' or @inkscape:connection-end='#%(id)s']" % dict(id=node.get('id'))
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connectors = node.getroottree().getroot().xpath(xpath, namespaces=inkex.NSS)
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# try to turn them into commands
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commands = []
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for connector in connectors:
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try:
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commands.append(Command(connector))
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except CommandParseError:
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# Parsing the connector failed, meaning it's not actually an Ink/Stitch command.
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pass
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return commands
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def layer_commands(layer, command):
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"""Find standalone (unconnected) command symbols in this layer."""
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for global_command in global_commands(layer.getroottree().getroot(), command):
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if layer in global_command.node.iterancestors():
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yield global_command
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def global_commands(svg, command):
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"""Find standalone (unconnected) command symbols anywhere in the document."""
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for standalone_command in _standalone_commands(svg):
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if standalone_command.command == command:
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yield standalone_command
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@cache
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def global_command(svg, command):
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"""Find a single command of the specified type.
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If more than one is found, print an error and exit.
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"""
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commands = list(global_commands(svg, command))
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if len(commands) == 1:
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return commands[0]
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elif len(commands) > 1:
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print >> sys.stderr, _("Error: there is more than one %(command)s command in the document, but there can only be one. "
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"Please remove all but one.") % dict(command=command)
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# L10N This is a continuation of the previous error message, letting the user know
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# what command we're talking about since we don't normally expose the actual
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# command name to them. Contents of %(description)s are in a separate translation
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# string.
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print >> sys.stderr, _("%(command)s: %(description)s") % dict(command=command, description=_(get_command_description(command)))
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sys.exit(1)
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else:
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return None
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def _standalone_commands(svg):
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"""Find all unconnected command symbols in the SVG."""
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xpath = ".//svg:use[starts-with(@xlink:href, '#inkstitch_')]"
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symbols = svg.xpath(xpath, namespaces=inkex.NSS)
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for symbol in symbols:
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try:
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yield StandaloneCommand(symbol)
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except CommandParseError:
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pass
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def is_command(node):
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return CONNECTION_START in node.attrib or CONNECTION_END in node.attrib
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@cache
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def symbols_path():
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return os.path.join(get_bundled_dir("symbols"), "inkstitch.svg")
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@cache
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def symbols_svg():
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with open(symbols_path()) as symbols_file:
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return inkex.etree.parse(symbols_file)
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@cache
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def symbol_defs():
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return get_defs(symbols_svg())
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@cache
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def get_defs(document):
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defs = document.find(SVG_DEFS_TAG)
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if defs is None:
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defs = inkex.etree.SubElement(document, SVG_DEFS_TAG)
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return defs
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def ensure_symbol(document, command):
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"""Make sure the command's symbol definition exists in the <svg:defs> tag."""
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path = "./*[@id='inkstitch_%s']" % command
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defs = get_defs(document)
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if defs.find(path) is None:
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defs.append(deepcopy(symbol_defs().find(path)))
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def add_group(document, node, command):
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return inkex.etree.SubElement(
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node.getparent(),
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SVG_GROUP_TAG,
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{
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"id": generate_unique_id(document, "group"),
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INKSCAPE_LABEL: _("Ink/Stitch Command") + ": %s" % get_command_description(command),
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"transform": get_correction_transform(node)
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})
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def add_connector(document, symbol, element):
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# I'd like it if I could position the connector endpoint nicely but inkscape just
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# moves it to the element's center immediately after the extension runs.
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start_pos = (symbol.get('x'), symbol.get('y'))
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end_pos = element.shape.centroid
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# Make sure the element's XML node has an id so that we can reference it.
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if element.node.get('id') is None:
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element.node.set('id', generate_unique_id(document, "object"))
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path = inkex.etree.Element(SVG_PATH_TAG,
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{
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"id": generate_unique_id(document, "connector"),
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"d": "M %s,%s %s,%s" % (start_pos[0], start_pos[1], end_pos.x, end_pos.y),
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"style": "stroke:#000000;stroke-width:1px;stroke-opacity:0.5;fill:none;",
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CONNECTION_START: "#%s" % symbol.get('id'),
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CONNECTION_END: "#%s" % element.node.get('id'),
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CONNECTOR_TYPE: "polyline",
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# l10n: the name of the line that connects a command to the object it applies to
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INKSCAPE_LABEL: _("connector")
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})
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symbol.getparent().insert(0, path)
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def add_symbol(document, group, command, pos):
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return inkex.etree.SubElement(group, SVG_USE_TAG,
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{
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"id": generate_unique_id(document, "use"),
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XLINK_HREF: "#inkstitch_%s" % command,
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"height": "100%",
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"width": "100%",
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"x": str(pos.x),
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"y": str(pos.y),
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# l10n: the name of a command symbol (example: scissors icon for trim command)
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INKSCAPE_LABEL: _("command marker"),
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})
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def get_command_pos(element, index, total):
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# Put command symbols 30 pixels out from the shape, spaced evenly around it.
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# get a line running 30 pixels out from the shape
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outline = element.shape.buffer(30).exterior
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# find the top center point on the outline and start there
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top_center = shgeo.Point(outline.centroid.x, outline.bounds[1])
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start_position = outline.project(top_center, normalized=True)
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# pick this item's spot around the outline and perturb it a bit to avoid
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# stacking up commands if they add commands multiple times
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position = index / float(total)
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position += random() * 0.05
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position += start_position
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return outline.interpolate(position, normalized=True)
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def remove_legacy_param(element, command):
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if command == "trim" or command == "stop":
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# If they had the old "TRIM after" or "STOP after" attributes set,
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# automatically delete them. THe new commands will do the same
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# thing.
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#
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# If we didn't delete these here, then things would get confusing.
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# If the user were to delete a "trim" symbol added by this extension
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# but the "embroider_trim_after" attribute is still set, then the
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# trim would keep happening.
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attribute = "embroider_%s_after" % command
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if attribute in element.node.attrib:
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del element.node.attrib[attribute]
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def add_commands(element, commands):
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document = get_document(element.node)
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for i, command in enumerate(commands):
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ensure_symbol(document, command)
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remove_legacy_param(element, command)
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group = add_group(document, element.node, command)
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pos = get_command_pos(element, i, len(commands))
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symbol = add_symbol(document, group, command, pos)
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add_connector(document, symbol, element)
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def add_layer_commands(layer, commands):
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document = get_document(layer)
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correction_transform = get_correction_transform(layer)
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for command in commands:
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ensure_symbol(document, command)
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inkex.etree.SubElement(layer, SVG_USE_TAG,
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{
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"id": generate_unique_id(document, "use"),
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INKSCAPE_LABEL: _("Ink/Stitch Command") + ": %s" % get_command_description(command),
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XLINK_HREF: "#inkstitch_%s" % command,
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"height": "100%",
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"width": "100%",
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"x": "0",
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"y": "-10",
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"transform": correction_transform
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})
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