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import simpletransform
from ..utils import string_to_floats, Point, cache
from .tags import SODIPODI_NAMEDVIEW, SODIPODI_GUIDE, INKSCAPE_LABEL
from .units import get_doc_size, get_viewbox_transform
class InkscapeGuide(object):
def __init__(self, node):
self.node = node
self.svg = node.getroottree().getroot()
self._parse()
def _parse(self):
self.label = self.node.get(INKSCAPE_LABEL, "")
doc_size = list(get_doc_size(self.svg))
# convert the size from viewbox-relative to real-world pixels
viewbox_transform = get_viewbox_transform(self.svg)
simpletransform.applyTransformToPoint(simpletransform.invertTransform(viewbox_transform), doc_size)
self.position = Point(*string_to_floats(self.node.get('position')))
# inkscape's Y axis is reversed from SVG's, and the guide is in inkscape coordinates
self.position.y = doc_size[1] - self.position.y
# This one baffles me. I think inkscape might have gotten the order of
# their vector wrong?
parts = string_to_floats(self.node.get('orientation'))
self.direction = Point(parts[1], parts[0])
@cache
def get_guides(svg):
"""Find all Inkscape guides and return as InkscapeGuide instances."""
namedview = svg.find(SODIPODI_NAMEDVIEW)
if namedview is None:
return []
return [InkscapeGuide(node) for node in namedview.findall(SODIPODI_GUIDE)]
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