kopia lustrzana https://github.com/inkstitch/inkstitch
87 wiersze
2.9 KiB
Python
87 wiersze
2.9 KiB
Python
from copy import copy
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import cubicsuperpath
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import simpletransform
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from ..svg import apply_transforms, get_guides
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from ..svg.tags import SVG_GROUP_TAG, SVG_PATH_TAG
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class Glyph(object):
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"""Represents a single character in a single font variant.
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For example, the font inkstitch_small may have variants for left-to-right,
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right-to-left, etc. Each variant would have a set of Glyphs, one for each
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character in that variant.
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Properties:
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width -- total width of this glyph including all component satins
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node -- svg:g XML node containing the component satins in this character
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"""
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def __init__(self, group):
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"""Create a Glyph.
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The nodes will be copied out of their parent SVG document (with nested
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transforms applied). The original nodes will be unmodified.
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Arguments:
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group -- an svg:g XML node containing all the paths that make up
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this Glyph. Nested groups are allowed.
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"""
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self._process_baseline(group.getroottree().getroot())
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self.node = self._process_group(group)
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self._process_bbox()
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self._move_to_origin()
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def _process_group(self, group):
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new_group = copy(group)
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new_group.attrib.pop('transform', None)
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del new_group[:] # delete references to the original group's children
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for node in group:
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if node.tag == SVG_GROUP_TAG:
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new_group.append(self._process_group(node))
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else:
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node_copy = copy(node)
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if "d" in node.attrib:
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# Convert the path to absolute coordinates, incorporating all
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# nested transforms.
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path = cubicsuperpath.parsePath(node.get("d"))
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apply_transforms(path, node)
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node_copy.set("d", cubicsuperpath.formatPath(path))
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# Delete transforms from paths and groups, since we applied
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# them to the paths already.
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node_copy.attrib.pop('transform', None)
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new_group.append(node_copy)
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return new_group
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def _process_baseline(self, svg):
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for guide in get_guides(svg):
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if guide.label == "baseline":
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self._baseline = guide.position.y
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break
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else:
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# no baseline guide found, assume 0 for lack of anything better to use...
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self._baseline = 0
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def _process_bbox(self):
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left, right, top, bottom = simpletransform.computeBBox(self.node.iterdescendants())
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self.width = right - left
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self._min_x = left
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def _move_to_origin(self):
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translate_x = -self._min_x
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translate_y = -self._baseline
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transform = "translate(%s, %s)" % (translate_x, translate_y)
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for node in self.node.iter(SVG_PATH_TAG):
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node.set('transform', transform)
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simpletransform.fuseTransform(node)
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