inkstitch/lib/elements/utils.py

# Authors: see git history
#
# Copyright (c) 2010 Authors
# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.

from ..commands import is_command
from ..marker import has_marker
from ..svg.tags import (EMBROIDERABLE_TAGS, SVG_IMAGE_TAG, SVG_PATH_TAG,
                        SVG_POLYGON_TAG, SVG_POLYLINE_TAG, SVG_TEXT_TAG)
from .clone import Clone, is_clone
from .element import EmbroideryElement
from .empty_d_object import EmptyDObject
from .fill_stitch import FillStitch
from .image import ImageObject
from .marker import MarkerObject
from .polyline import Polyline
from .satin_column import SatinColumn
from .stroke import Stroke
from .text import TextObject


def node_to_elements(node, clone_to_element=False):  # noqa: C901
    if node.tag == SVG_POLYLINE_TAG:
        return [Polyline(node)]

    elif is_clone(node) and not clone_to_element:
        # clone_to_element: get an actual embroiderable element once a clone has been defined as a clone
        return [Clone(node)]

    elif ((node.tag == SVG_PATH_TAG and not node.get('d', None)) or
          (node.tag in [SVG_POLYLINE_TAG, SVG_POLYGON_TAG] and not node.get('points', None))):
        return [EmptyDObject(node)]

    elif has_marker(node):
        return [MarkerObject(node)]

    elif node.tag in EMBROIDERABLE_TAGS or is_clone(node):
        element = EmbroideryElement(node)

        elements = []
        if element.get_style("fill", "black") and not element.get_style('fill-opacity', 1) == "0":
            elements.append(FillStitch(node))
        if element.get_style("stroke"):
            if element.get_boolean_param("satin_column") and len(element.path) > 1:
                elements.append(SatinColumn(node))
            elif not is_command(element.node):
                elements.append(Stroke(node))
        if element.get_boolean_param("stroke_first", False):
            elements.reverse()
        return elements

    elif node.tag == SVG_IMAGE_TAG:
        return [ImageObject(node)]

    elif node.tag == SVG_TEXT_TAG:
        return [TextObject(node)]

    else:
        return []


def nodes_to_elements(nodes):
    elements = []
    for node in nodes:
        elements.extend(node_to_elements(node))

    return elements