kopia lustrzana https://github.com/inkstitch/inkstitch
231 wiersze
7.2 KiB
Python
231 wiersze
7.2 KiB
Python
import sys
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import inkex
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import cubicsuperpath
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import simpletransform
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from .svg import apply_transforms, get_node_transform
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from .svg.tags import SVG_USE_TAG, SVG_SYMBOL_TAG, CONNECTION_START, CONNECTION_END, XLINK_HREF
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from .utils import cache, Point
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from .i18n import _, N_
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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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