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# 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 copy import copy
from inkex import paths, transforms, units
from ..svg import get_correction_transform, get_guides
from ..svg.tags import (CONNECTION_END, SVG_GROUP_TAG, SVG_PATH_TAG,
SVG_USE_TAG, XLINK_HREF)
class Glyph(object):
"""Represents a single character in a single font variant.
For example, the font inkstitch_small may have variants for left-to-right,
right-to-left, etc. Each variant would have a set of Glyphs, one for each
character in that variant.
Properties:
width -- total width of this glyph including all component satins
node -- svg:g XML node containing the component satins in this character
"""
def __init__(self, group):
"""Create a Glyph.
The nodes will be copied out of their parent SVG document (with nested
transforms applied). The original nodes will be unmodified.
Arguments:
group -- an svg:g XML node containing all the paths that make up
this Glyph. Nested groups are allowed.
"""
self._process_baseline(group.getroottree().getroot())
self.node = self._process_group(group)
self._process_bbox()
self._move_to_origin()
self._process_commands()
def _process_group(self, group):
new_group = copy(group)
# new_group.attrib.pop('transform', None)
# delete references to the original group's children
del new_group[:]
for node in group:
if node.tag == SVG_GROUP_TAG:
new_group.append(self._process_group(node))
else:
node_copy = copy(node)
transform = -transforms.Transform(get_correction_transform(node, True))
if "d" in node.attrib:
node_copy.path = node.path.transform(transform).to_absolute()
if not node.tag == SVG_USE_TAG:
# Delete transforms from paths and groups, since we applied
# them to the paths already.
node_copy.attrib.pop('transform', None)
else:
oldx = node.get('x', 0)
oldy = node.get('y', 0)
x, y = transform.apply_to_point((oldx, oldy))
node_copy.set('x', x)
node_copy.set('y', y)
new_group.append(node_copy)
return new_group
def _process_baseline(self, svg):
for guide in get_guides(svg):
if guide.label == "baseline":
self.baseline = guide.position.y
break
else:
# no baseline guide found, assume 0 for lack of anything better to use...
self.baseline = 0
def _process_bbox(self):
bbox = [paths.Path(node.get("d")).bounding_box() for node in self.node.iterdescendants(SVG_PATH_TAG) if not node.get(CONNECTION_END, None)]
left, right = min([box.left for box in bbox]), max([box.right for box in bbox])
self.width = right - left
self.min_x = left
def _process_commands(self):
# Save object ids with commands in a dictionary: {object_id: [connector_id, symbol_id]}
self.commands = {}
for node in self.node.iter(SVG_USE_TAG):
xlink = node.get(XLINK_HREF, ' ')
if not xlink.startswith('#inkstitch_'):
continue
try:
connector = self.node.xpath(".//*[@inkscape:connection-start='#%s']" % node.get('id', ' '))[0]
command_object = connector.get(CONNECTION_END)[1:]
try:
self.commands[command_object].append([connector.get_id(), node.get_id()])
except KeyError:
self.commands[command_object] = [[connector.get_id(), node.get_id()]]
except IndexError:
pass
def _move_to_origin(self):
translate_x = -self.min_x
translate_y = -self.baseline
transform = transforms.Transform("translate(%s, %s)" % (translate_x, translate_y))
for node in self.node.iter(SVG_PATH_TAG):
path = paths.Path(node.get("d"))
path = path.transform(transform)
node.set('d', str(path))
node.attrib.pop('transform', None)
# Move commands as well
for node in self.node.iter(SVG_USE_TAG):
oldx = units.convert_unit(node.get("x", 0), 'px', node.unit)
oldy = units.convert_unit(node.get("y", 0), 'px', node.unit)
x, y = transform.apply_to_point((oldx, oldy))
node.set('x', x)
node.set('y', y)
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