"""
designSpaceDocument
- Read and write designspace files
"""
from __future__ import annotations
import collections
import copy
import itertools
import math
import os
import posixpath
from io import BytesIO, StringIO
from textwrap import indent
from typing import Any, Dict, List, MutableMapping, Optional, Tuple, Union, cast
from fontTools.misc import etree as ET
from fontTools.misc import plistlib
from fontTools.misc.loggingTools import LogMixin
from fontTools.misc.textTools import tobytes, tostr
__all__ = [
"AxisDescriptor",
"AxisLabelDescriptor",
"AxisMappingDescriptor",
"BaseDocReader",
"BaseDocWriter",
"DesignSpaceDocument",
"DesignSpaceDocumentError",
"DiscreteAxisDescriptor",
"InstanceDescriptor",
"LocationLabelDescriptor",
"RangeAxisSubsetDescriptor",
"RuleDescriptor",
"SourceDescriptor",
"ValueAxisSubsetDescriptor",
"VariableFontDescriptor",
]
# ElementTree allows to find namespace-prefixed elements, but not attributes
# so we have to do it ourselves for 'xml:lang'
XML_NS = "{http://www.w3.org/XML/1998/namespace}"
XML_LANG = XML_NS + "lang"
def posix(path):
"""Normalize paths using forward slash to work also on Windows."""
new_path = posixpath.join(*path.split(os.path.sep))
if path.startswith("/"):
# The above transformation loses absolute paths
new_path = "/" + new_path
elif path.startswith(r"\\"):
# The above transformation loses leading slashes of UNC path mounts
new_path = "//" + new_path
return new_path
def posixpath_property(private_name):
"""Generate a propery that holds a path always using forward slashes."""
def getter(self):
# Normal getter
return getattr(self, private_name)
def setter(self, value):
# The setter rewrites paths using forward slashes
if value is not None:
value = posix(value)
setattr(self, private_name, value)
return property(getter, setter)
class DesignSpaceDocumentError(Exception):
def __init__(self, msg, obj=None):
self.msg = msg
self.obj = obj
def __str__(self):
return str(self.msg) + (": %r" % self.obj if self.obj is not None else "")
class AsDictMixin(object):
def asdict(self):
d = {}
for attr, value in self.__dict__.items():
if attr.startswith("_"):
continue
if hasattr(value, "asdict"):
value = value.asdict()
elif isinstance(value, list):
value = [v.asdict() if hasattr(v, "asdict") else v for v in value]
d[attr] = value
return d
class SimpleDescriptor(AsDictMixin):
"""Containers for a bunch of attributes"""
# XXX this is ugly. The 'print' is inappropriate here, and instead of
# assert, it should simply return True/False
def compare(self, other):
# test if this object contains the same data as the other
for attr in self._attrs:
try:
assert getattr(self, attr) == getattr(other, attr)
except AssertionError:
print(
"failed attribute",
attr,
getattr(self, attr),
"!=",
getattr(other, attr),
)
def __repr__(self):
attrs = [f"{a}={repr(getattr(self, a))}," for a in self._attrs]
attrs = indent("\n".join(attrs), " ")
return f"{self.__class__.__name__}(\n{attrs}\n)"
class SourceDescriptor(SimpleDescriptor):
"""Simple container for data related to the source
.. code:: python
doc = DesignSpaceDocument()
s1 = SourceDescriptor()
s1.path = masterPath1
s1.name = "master.ufo1"
s1.font = defcon.Font("master.ufo1")
s1.location = dict(weight=0)
s1.familyName = "MasterFamilyName"
s1.styleName = "MasterStyleNameOne"
s1.localisedFamilyName = dict(fr="Caractère")
s1.mutedGlyphNames.append("A")
s1.mutedGlyphNames.append("Z")
doc.addSource(s1)
"""
flavor = "source"
_attrs = [
"filename",
"path",
"name",
"layerName",
"location",
"copyLib",
"copyGroups",
"copyFeatures",
"muteKerning",
"muteInfo",
"mutedGlyphNames",
"familyName",
"styleName",
"localisedFamilyName",
]
filename = posixpath_property("_filename")
path = posixpath_property("_path")
def __init__(
self,
*,
filename=None,
path=None,
font=None,
name=None,
location=None,
designLocation=None,
layerName=None,
familyName=None,
styleName=None,
localisedFamilyName=None,
copyLib=False,
copyInfo=False,
copyGroups=False,
copyFeatures=False,
muteKerning=False,
muteInfo=False,
mutedGlyphNames=None,
):
self.filename = filename
"""string. A relative path to the source file, **as it is in the document**.
MutatorMath + VarLib.
"""
self.path = path
"""The absolute path, calculated from filename."""
self.font = font
"""Any Python object. Optional. Points to a representation of this
source font that is loaded in memory, as a Python object (e.g. a
``defcon.Font`` or a ``fontTools.ttFont.TTFont``).
The default document reader will not fill-in this attribute, and the
default writer will not use this attribute. It is up to the user of
``designspaceLib`` to either load the resource identified by
``filename`` and store it in this field, or write the contents of
this field to the disk and make ```filename`` point to that.
"""
self.name = name
"""string. Optional. Unique identifier name for this source.
MutatorMath + varLib.
"""
self.designLocation = (
designLocation if designLocation is not None else location or {}
)
"""dict. Axis values for this source, in design space coordinates.
MutatorMath + varLib.
This may be only part of the full design location.
See :meth:`getFullDesignLocation()`
.. versionadded:: 5.0
"""
self.layerName = layerName
"""string. The name of the layer in the source to look for
outline data. Default ``None`` which means ``foreground``.
"""
self.familyName = familyName
"""string. Family name of this source. Though this data
can be extracted from the font, it can be efficient to have it right
here.
varLib.
"""
self.styleName = styleName
"""string. Style name of this source. Though this data
can be extracted from the font, it can be efficient to have it right
here.
varLib.
"""
self.localisedFamilyName = localisedFamilyName or {}
"""dict. A dictionary of localised family name strings, keyed by
language code.
If present, will be used to build localized names for all instances.
.. versionadded:: 5.0
"""
self.copyLib = copyLib
"""bool. Indicates if the contents of the font.lib need to
be copied to the instances.
MutatorMath.
.. deprecated:: 5.0
"""
self.copyInfo = copyInfo
"""bool. Indicates if the non-interpolating font.info needs
to be copied to the instances.
MutatorMath.
.. deprecated:: 5.0
"""
self.copyGroups = copyGroups
"""bool. Indicates if the groups need to be copied to the
instances.
MutatorMath.
.. deprecated:: 5.0
"""
self.copyFeatures = copyFeatures
"""bool. Indicates if the feature text needs to be
copied to the instances.
MutatorMath.
.. deprecated:: 5.0
"""
self.muteKerning = muteKerning
"""bool. Indicates if the kerning data from this source
needs to be muted (i.e. not be part of the calculations).
MutatorMath only.
"""
self.muteInfo = muteInfo
"""bool. Indicated if the interpolating font.info data for
this source needs to be muted.
MutatorMath only.
"""
self.mutedGlyphNames = mutedGlyphNames or []
"""list. Glyphnames that need to be muted in the
instances.
MutatorMath only.
"""
@property
def location(self):
"""dict. Axis values for this source, in design space coordinates.
MutatorMath + varLib.
.. deprecated:: 5.0
Use the more explicit alias for this property :attr:`designLocation`.
"""
return self.designLocation
@location.setter
def location(self, location: Optional[SimpleLocationDict]):
self.designLocation = location or {}
def setFamilyName(self, familyName, languageCode="en"):
"""Setter for :attr:`localisedFamilyName`
.. versionadded:: 5.0
"""
self.localisedFamilyName[languageCode] = tostr(familyName)
def getFamilyName(self, languageCode="en"):
"""Getter for :attr:`localisedFamilyName`
.. versionadded:: 5.0
"""
return self.localisedFamilyName.get(languageCode)
def getFullDesignLocation(self, doc: "DesignSpaceDocument") -> SimpleLocationDict:
"""Get the complete design location of this source, from its
:attr:`designLocation` and the document's axis defaults.
.. versionadded:: 5.0
"""
result: SimpleLocationDict = {}
for axis in doc.axes:
if axis.name in self.designLocation:
result[axis.name] = self.designLocation[axis.name]
else:
result[axis.name] = axis.map_forward(axis.default)
return result
class RuleDescriptor(SimpleDescriptor):
"""Represents the rule descriptor element: a set of glyph substitutions to
trigger conditionally in some parts of the designspace.
.. code:: python
r1 = RuleDescriptor()
r1.name = "unique.rule.name"
r1.conditionSets.append([dict(name="weight", minimum=-10, maximum=10), dict(...)])
r1.conditionSets.append([dict(...), dict(...)])
r1.subs.append(("a", "a.alt"))
.. code:: xml
<!-- optional: list of substitution rules -->
<rules>
<rule name="vertical.bars">
<conditionset>
<condition minimum="250.000000" maximum="750.000000" name="weight"/>
<condition minimum="100" name="width"/>
<condition minimum="10" maximum="40" name="optical"/>
</conditionset>
<sub name="cent" with="cent.alt"/>
<sub name="dollar" with="dollar.alt"/>
</rule>
</rules>
"""
_attrs = ["name", "conditionSets", "subs"] # what do we need here
def __init__(self, *, name=None, conditionSets=None, subs=None):
self.name = name
"""string. Unique name for this rule. Can be used to reference this rule data."""
# list of lists of dict(name='aaaa', minimum=0, maximum=1000)
self.conditionSets = conditionSets or []
"""a list of conditionsets.
- Each conditionset is a list of conditions.
- Each condition is a dict with ``name``, ``minimum`` and ``maximum`` keys.
"""
# list of substitutions stored as tuples of glyphnames ("a", "a.alt")
self.subs = subs or []
"""list of substitutions.
- Each substitution is stored as tuples of glyphnames, e.g. ("a", "a.alt").
- Note: By default, rules are applied first, before other text
shaping/OpenType layout, as they are part of the
`Required Variation Alternates OpenType feature <https://docs.microsoft.com/en-us/typography/opentype/spec/features_pt#-tag-rvrn>`_.
See ref:`rules-element` § Attributes.
"""
def evaluateRule(rule, location):
"""Return True if any of the rule's conditionsets matches the given location."""
return any(evaluateConditions(c, location) for c in rule.conditionSets)
def evaluateConditions(conditions, location):
"""Return True if all the conditions matches the given location.
- If a condition has no minimum, check for < maximum.
- If a condition has no maximum, check for > minimum.
"""
for cd in conditions:
value = location[cd["name"]]
if cd.get("minimum") is None:
if value > cd["maximum"]:
return False
elif cd.get("maximum") is None:
if cd["minimum"] > value:
return False
elif not cd["minimum"] <= value <= cd["maximum"]:
return False
return True
def processRules(rules, location, glyphNames):
"""Apply these rules at this location to these glyphnames.
Return a new list of glyphNames with substitutions applied.
- rule order matters
"""
newNames = []
for rule in rules:
if evaluateRule(rule, location):
for name in glyphNames:
swap = False
for a, b in rule.subs:
if name == a:
swap = True
break
if swap:
newNames.append(b)
else:
newNames.append(name)
glyphNames = newNames
newNames = []
return glyphNames
AnisotropicLocationDict = Dict[str, Union[float, Tuple[float, float]]]
SimpleLocationDict = Dict[str, float]
class AxisMappingDescriptor(SimpleDescriptor):
"""Represents the axis mapping element: mapping an input location
to an output location in the designspace.
.. code:: python
m1 = AxisMappingDescriptor()
m1.inputLocation = {"weight": 900, "width": 150}
m1.outputLocation = {"weight": 870}
.. code:: xml
<mappings>
<mapping>
<input>
<dimension name="weight" xvalue="900"/>
<dimension name="width" xvalue="150"/>
</input>
<output>
<dimension name="weight" xvalue="870"/>
</output>
</mapping>
</mappings>
"""
_attrs = ["inputLocation", "outputLocation"]
def __init__(
self,
*,
inputLocation=None,
outputLocation=None,
description=None,
groupDescription=None,
):
self.inputLocation: SimpleLocationDict = inputLocation or {}
"""dict. Axis values for the input of the mapping, in design space coordinates.
varLib.
.. versionadded:: 5.1
"""
self.outputLocation: SimpleLocationDict = outputLocation or {}
"""dict. Axis values for the output of the mapping, in design space coordinates.
varLib.
.. versionadded:: 5.1
"""
self.description = description
"""string. A description of the mapping.
varLib.
.. versionadded:: 5.2
"""
self.groupDescription = groupDescription
"""string. A description of the group of mappings.
varLib.
.. versionadded:: 5.2
"""
class InstanceDescriptor(SimpleDescriptor):
"""Simple container for data related to the instance
.. code:: python
i2 = InstanceDescriptor()
i2.path = instancePath2
i2.familyName = "InstanceFamilyName"
i2.styleName = "InstanceStyleName"
i2.name = "instance.ufo2"
# anisotropic location
i2.designLocation = dict(weight=500, width=(400,300))
i2.postScriptFontName = "InstancePostscriptName"
i2.styleMapFamilyName = "InstanceStyleMapFamilyName"
i2.styleMapStyleName = "InstanceStyleMapStyleName"
i2.lib['com.coolDesignspaceApp.specimenText'] = 'Hamburgerwhatever'
doc.addInstance(i2)
"""
flavor = "instance"
_defaultLanguageCode = "en"
_attrs = [
"filename",
"path",
"name",
"locationLabel",
"designLocation",
"userLocation",
"familyName",
"styleName",
"postScriptFontName",
"styleMapFamilyName",
"styleMapStyleName",
"localisedFamilyName",
"localisedStyleName",
"localisedStyleMapFamilyName",
"localisedStyleMapStyleName",
"glyphs",
"kerning",
"info",
"lib",
]
filename = posixpath_property("_filename")
path = posixpath_property("_path")
def __init__(
self,
*,
filename=None,
path=None,
font=None,
name=None,
location=None,
locationLabel=None,
designLocation=None,
userLocation=None,
familyName=None,
styleName=None,
postScriptFontName=None,
styleMapFamilyName=None,
styleMapStyleName=None,
localisedFamilyName=None,
localisedStyleName=None,
localisedStyleMapFamilyName=None,
localisedStyleMapStyleName=None,
glyphs=None,
kerning=True,
info=True,
lib=None,
):
self.filename = filename
"""string. Relative path to the instance file, **as it is
in the document**. The file may or may not exist.
MutatorMath + VarLib.
"""
self.path = path
"""string. Absolute path to the instance file, calculated from
the document path and the string in the filename attr. The file may
or may not exist.
MutatorMath.
"""
self.font = font
"""Same as :attr:`SourceDescriptor.font`
.. seealso:: :attr:`SourceDescriptor.font`
"""
self.name = name
"""string. Unique identifier name of the instance, used to
identify it if it needs to be referenced from elsewhere in the
document.
"""
self.locationLabel = locationLabel
"""Name of a :class:`LocationLabelDescriptor`. If
provided, the instance should have the same location as the
LocationLabel.
.. seealso::
:meth:`getFullDesignLocation`
:meth:`getFullUserLocation`
.. versionadded:: 5.0
"""
self.designLocation: AnisotropicLocationDict = (
designLocation if designLocation is not None else (location or {})
)
"""dict. Axis values for this instance, in design space coordinates.
MutatorMath + varLib.
.. seealso:: This may be only part of the full location. See:
:meth:`getFullDesignLocation`
:meth:`getFullUserLocation`
.. versionadded:: 5.0
"""
self.userLocation: SimpleLocationDict = userLocation or {}
"""dict. Axis values for this instance, in user space coordinates.
MutatorMath + varLib.
.. seealso:: This may be only part of the full location. See:
:meth:`getFullDesignLocation`
:meth:`getFullUserLocation`
.. versionadded:: 5.0
"""
self.familyName = familyName
"""string. Family name of this instance.
MutatorMath + varLib.
"""
self.styleName = styleName
"""string. Style name of this instance.
MutatorMath + varLib.
"""
self.postScriptFontName = postScriptFontName
"""string. Postscript fontname for this instance.
MutatorMath + varLib.
"""
self.styleMapFamilyName = styleMapFamilyName
"""string. StyleMap familyname for this instance.
MutatorMath + varLib.
"""
self.styleMapStyleName = styleMapStyleName
"""string. StyleMap stylename for this instance.
MutatorMath + varLib.
"""
self.localisedFamilyName = localisedFamilyName or {}
"""dict. A dictionary of localised family name
strings, keyed by language code.
"""
self.localisedStyleName = localisedStyleName or {}
"""dict. A dictionary of localised stylename
strings, keyed by language code.
"""
self.localisedStyleMapFamilyName = localisedStyleMapFamilyName or {}
"""A dictionary of localised style map
familyname strings, keyed by language code.
"""
self.localisedStyleMapStyleName = localisedStyleMapStyleName or {}
"""A dictionary of localised style map
stylename strings, keyed by language code.
"""
self.glyphs = glyphs or {}
"""dict for special master definitions for glyphs. If glyphs
need special masters (to record the results of executed rules for
example).
MutatorMath.
.. deprecated:: 5.0
Use rules or sparse sources instead.
"""
self.kerning = kerning
""" bool. Indicates if this instance needs its kerning
calculated.
MutatorMath.
.. deprecated:: 5.0
"""
self.info = info
"""bool. Indicated if this instance needs the interpolating
font.info calculated.
.. deprecated:: 5.0
"""
self.lib = lib or {}
"""Custom data associated with this instance."""
@property
def location(self):
"""dict. Axis values for this instance.
MutatorMath + varLib.
.. deprecated:: 5.0
Use the more explicit alias for this property :attr:`designLocation`.
"""
return self.designLocation
@location.setter
def location(self, location: Optional[AnisotropicLocationDict]):
self.designLocation = location or {}
def setStyleName(self, styleName, languageCode="en"):
"""These methods give easier access to the localised names."""
self.localisedStyleName[languageCode] = tostr(styleName)
def getStyleName(self, languageCode="en"):
return self.localisedStyleName.get(languageCode)
def setFamilyName(self, familyName, languageCode="en"):
self.localisedFamilyName[languageCode] = tostr(familyName)
def getFamilyName(self, languageCode="en"):
return self.localisedFamilyName.get(languageCode)
def setStyleMapStyleName(self, styleMapStyleName, languageCode="en"):
self.localisedStyleMapStyleName[languageCode] = tostr(styleMapStyleName)
def getStyleMapStyleName(self, languageCode="en"):
return self.localisedStyleMapStyleName.get(languageCode)
def setStyleMapFamilyName(self, styleMapFamilyName, languageCode="en"):
self.localisedStyleMapFamilyName[languageCode] = tostr(styleMapFamilyName)
def getStyleMapFamilyName(self, languageCode="en"):
return self.localisedStyleMapFamilyName.get(languageCode)
def clearLocation(self, axisName: Optional[str] = None):
"""Clear all location-related fields. Ensures that
:attr:``designLocation`` and :attr:``userLocation`` are dictionaries
(possibly empty if clearing everything).
In order to update the location of this instance wholesale, a user
should first clear all the fields, then change the field(s) for which
they have data.
.. code:: python
instance.clearLocation()
instance.designLocation = {'Weight': (34, 36.5), 'Width': 100}
instance.userLocation = {'Opsz': 16}
In order to update a single axis location, the user should only clear
that axis, then edit the values:
.. code:: python
instance.clearLocation('Weight')
instance.designLocation['Weight'] = (34, 36.5)
Args:
axisName: if provided, only clear the location for that axis.
.. versionadded:: 5.0
"""
self.locationLabel = None
if axisName is None:
self.designLocation = {}
self.userLocation = {}
else:
if self.designLocation is None:
self.designLocation = {}
if axisName in self.designLocation:
del self.designLocation[axisName]
if self.userLocation is None:
self.userLocation = {}
if axisName in self.userLocation:
del self.userLocation[axisName]
def getLocationLabelDescriptor(
self, doc: "DesignSpaceDocument"
) -> Optional[LocationLabelDescriptor]:
"""Get the :class:`LocationLabelDescriptor` instance that matches
this instances's :attr:`locationLabel`.
Raises if the named label can't be found.
.. versionadded:: 5.0
"""
if self.locationLabel is None:
return None
label = doc.getLocationLabel(self.locationLabel)
if label is None:
raise DesignSpaceDocumentError(
"InstanceDescriptor.getLocationLabelDescriptor(): "
f"unknown location label `{self.locationLabel}` in instance `{self.name}`."
)
return label
def getFullDesignLocation(
self, doc: "DesignSpaceDocument"
) -> AnisotropicLocationDict:
"""Get the complete design location of this instance, by combining data
from the various location fields, default axis values and mappings, and
top-level location labels.
The source of truth for this instance's location is determined for each
axis independently by taking the first not-None field in this list:
- ``locationLabel``: the location along this axis is the same as the
matching STAT format 4 label. No anisotropy.
- ``designLocation[axisName]``: the explicit design location along this
axis, possibly anisotropic.
- ``userLocation[axisName]``: the explicit user location along this
axis. No anisotropy.
- ``axis.default``: default axis value. No anisotropy.
.. versionadded:: 5.0
"""
label = self.getLocationLabelDescriptor(doc)
if label is not None:
return doc.map_forward(label.userLocation) # type: ignore
result: AnisotropicLocationDict = {}
for axis in doc.axes:
if axis.name in self.designLocation:
result[axis.name] = self.designLocation[axis.name]
elif axis.name in self.userLocation:
result[axis.name] = axis.map_forward(self.userLocation[axis.name])
else:
result[axis.name] = axis.map_forward(axis.default)
return result
def getFullUserLocation(self, doc: "DesignSpaceDocument") -> SimpleLocationDict:
"""Get the complete user location for this instance.
.. seealso:: :meth:`getFullDesignLocation`
.. versionadded:: 5.0
"""
return doc.map_backward(self.getFullDesignLocation(doc))
def tagForAxisName(name):
# try to find or make a tag name for this axis name
names = {
"weight": ("wght", dict(en="Weight")),
"width": ("wdth", dict(en="Width")),
"optical": ("opsz", dict(en="Optical Size")),
"slant": ("slnt", dict(en="Slant")),
"italic": ("ital", dict(en="Italic")),
}
if name.lower() in names:
return names[name.lower()]
if len(name) < 4:
tag = name + "*" * (4 - len(name))
else:
tag = name[:4]
return tag, dict(en=name)
class AbstractAxisDescriptor(SimpleDescriptor):
flavor = "axis"
def __init__(
self,
*,
tag=None,
name=None,
labelNames=None,
hidden=False,
map=None,
axisOrdering=None,
axisLabels=None,
):
# opentype tag for this axis
self.tag = tag
"""string. Four letter tag for this axis. Some might be
registered at the `OpenType
specification <https://www.microsoft.com/typography/otspec/fvar.htm#VAT>`__.
Privately-defined axis tags must begin with an uppercase letter and
use only uppercase letters or digits.
"""
# name of the axis used in locations
self.name = name
"""string. Name of the axis as it is used in the location dicts.
MutatorMath + varLib.
"""
# names for UI purposes, if this is not a standard axis,
self.labelNames = labelNames or {}
"""dict. When defining a non-registered axis, it will be
necessary to define user-facing readable names for the axis. Keyed by
xml:lang code. Values are required to be ``unicode`` strings, even if
they only contain ASCII characters.
"""
self.hidden = hidden
"""bool. Whether this axis should be hidden in user interfaces.
"""
self.map = map or []
"""list of input / output values that can describe a warp of user space
to design space coordinates. If no map values are present, it is assumed
user space is the same as design space, as in [(minimum, minimum),
(maximum, maximum)].
varLib.
"""
self.axisOrdering = axisOrdering
"""STAT table field ``axisOrdering``.
See: `OTSpec STAT Axis Record <https://docs.microsoft.com/en-us/typography/opentype/spec/stat#axis-records>`_
.. versionadded:: 5.0
"""
self.axisLabels: List[AxisLabelDescriptor] = axisLabels or []
"""STAT table entries for Axis Value Tables format 1, 2, 3.
See: `OTSpec STAT Axis Value Tables <https://docs.microsoft.com/en-us/typography/opentype/spec/stat#axis-value-tables>`_
.. versionadded:: 5.0
"""
class AxisDescriptor(AbstractAxisDescriptor):
"""Simple container for the axis data.
Add more localisations?
.. code:: python
a1 = AxisDescriptor()
a1.minimum = 1
a1.maximum = 1000
a1.default = 400
a1.name = "weight"
a1.tag = "wght"
a1.labelNames['fa-IR'] = "قطر"
a1.labelNames['en'] = "Wéíght"
a1.map = [(1.0, 10.0), (400.0, 66.0), (1000.0, 990.0)]
a1.axisOrdering = 1
a1.axisLabels = [
AxisLabelDescriptor(name="Regular", userValue=400, elidable=True)
]
doc.addAxis(a1)
"""
_attrs = [
"tag",
"name",
"maximum",
"minimum",
"default",
"map",
"axisOrdering",
"axisLabels",
]
def __init__(
self,
*,
tag=None,
name=None,
labelNames=None,
minimum=None,
default=None,
maximum=None,
hidden=False,
map=None,
axisOrdering=None,
axisLabels=None,
):
super().__init__(
tag=tag,
name=name,
labelNames=labelNames,
hidden=hidden,
map=map,
axisOrdering=axisOrdering,
axisLabels=axisLabels,
)
self.minimum = minimum
"""number. The minimum value for this axis in user space.
MutatorMath + varLib.
"""
self.maximum = maximum
"""number. The maximum value for this axis in user space.
MutatorMath + varLib.
"""
self.default = default
"""number. The default value for this axis, i.e. when a new location is
created, this is the value this axis will get in user space.
MutatorMath + varLib.
"""
def serialize(self):
# output to a dict, used in testing
return dict(
tag=self.tag,
name=self.name,
labelNames=self.labelNames,
maximum=self.maximum,
minimum=self.minimum,
default=self.default,
hidden=self.hidden,
map=self.map,
axisOrdering=self.axisOrdering,
axisLabels=self.axisLabels,
)
def map_forward(self, v):
"""Maps value from axis mapping's input (user) to output (design)."""
from fontTools.varLib.models import piecewiseLinearMap
if not self.map:
return v
return piecewiseLinearMap(v, {k: v for k, v in self.map})
def map_backward(self, v):
"""Maps value from axis mapping's output (design) to input (user)."""
from fontTools.varLib.models import piecewiseLinearMap
if isinstance(v, tuple):
v = v[0]
if not self.map:
return v
return piecewiseLinearMap(v, {v: k for k, v in self.map})
class DiscreteAxisDescriptor(AbstractAxisDescriptor):
"""Container for discrete axis data.
Use this for axes that do not interpolate. The main difference from a
continuous axis is that a continuous axis has a ``minimum`` and ``maximum``,
while a discrete axis has a list of ``values``.
Example: an Italic axis with 2 stops, Roman and Italic, that are not
compatible. The axis still allows to bind together the full font family,
which is useful for the STAT table, however it can't become a variation
axis in a VF.
.. code:: python
a2 = DiscreteAxisDescriptor()
a2.values = [0, 1]
a2.default = 0
a2.name = "Italic"
a2.tag = "ITAL"
a2.labelNames['fr'] = "Italique"
a2.map = [(0, 0), (1, -11)]
a2.axisOrdering = 2
a2.axisLabels = [
AxisLabelDescriptor(name="Roman", userValue=0, elidable=True)
]
doc.addAxis(a2)
.. versionadded:: 5.0
"""
flavor = "axis"
_attrs = ("tag", "name", "values", "default", "map", "axisOrdering", "axisLabels")
def __init__(
self,
*,
tag=None,
name=None,
labelNames=None,
values=None,
default=None,
hidden=False,
map=None,
axisOrdering=None,
axisLabels=None,
):
super().__init__(
tag=tag,
name=name,
labelNames=labelNames,
hidden=hidden,
map=map,
axisOrdering=axisOrdering,
axisLabels=axisLabels,
)
self.default: float = default
"""The default value for this axis, i.e. when a new location is
created, this is the value this axis will get in user space.
However, this default value is less important than in continuous axes:
- it doesn't define the "neutral" version of outlines from which
deltas would apply, as this axis does not interpolate.
- it doesn't provide the reference glyph set for the designspace, as
fonts at each value can have different glyph sets.
"""
self.values: List[float] = values or []
"""List of possible values for this axis. Contrary to continuous axes,
only the values in this list can be taken by the axis, nothing in-between.
"""
def map_forward(self, value):
"""Maps value from axis mapping's input to output.
Returns value unchanged if no mapping entry is found.
Note: for discrete axes, each value must have its mapping entry, if
you intend that value to be mapped.
"""
return next((v for k, v in self.map if k == value), value)
def map_backward(self, value):
"""Maps value from axis mapping's output to input.
Returns value unchanged if no mapping entry is found.
Note: for discrete axes, each value must have its mapping entry, if
you intend that value to be mapped.
"""
if isinstance(value, tuple):
value = value[0]
return next((k for k, v in self.map if v == value), value)
class AxisLabelDescriptor(SimpleDescriptor):
"""Container for axis label data.
Analogue of OpenType's STAT data for a single axis (formats 1, 2 and 3).
All values are user values.
See: `OTSpec STAT Axis value table, format 1, 2, 3 <https://docs.microsoft.com/en-us/typography/opentype/spec/stat#axis-value-table-format-1>`_
The STAT format of the Axis value depends on which field are filled-in,
see :meth:`getFormat`
.. versionadded:: 5.0
"""
flavor = "label"
_attrs = (
"userMinimum",
"userValue",
"userMaximum",
"name",
"elidable",
"olderSibling",
"linkedUserValue",
"labelNames",
)
def __init__(
self,
*,
name,
userValue,
userMinimum=None,
userMaximum=None,
elidable=False,
olderSibling=False,
linkedUserValue=None,
labelNames=None,
):
self.userMinimum: Optional[float] = userMinimum
"""STAT field ``rangeMinValue`` (format 2)."""
self.userValue: float = userValue
"""STAT field ``value`` (format 1, 3) or ``nominalValue`` (format 2)."""
self.userMaximum: Optional[float] = userMaximum
"""STAT field ``rangeMaxValue`` (format 2)."""
self.name: str = name
"""Label for this axis location, STAT field ``valueNameID``."""
self.elidable: bool = elidable
"""STAT flag ``ELIDABLE_AXIS_VALUE_NAME``.
See: `OTSpec STAT Flags <https://docs.microsoft.com/en-us/typography/opentype/spec/stat#flags>`_
"""
self.olderSibling: bool = olderSibling
"""STAT flag ``OLDER_SIBLING_FONT_ATTRIBUTE``.
See: `OTSpec STAT Flags <https://docs.microsoft.com/en-us/typography/opentype/spec/stat#flags>`_
"""
self.linkedUserValue: Optional[float] = linkedUserValue
"""STAT field ``linkedValue`` (format 3)."""
self.labelNames: MutableMapping[str, str] = labelNames or {}
"""User-facing translations of this location's label. Keyed by
``xml:lang`` code.
"""
def getFormat(self) -> int:
"""Determine which format of STAT Axis value to use to encode this label.
=========== ========= =========== =========== ===============
STAT Format userValue userMinimum userMaximum linkedUserValue
=========== ========= =========== =========== ===============
1 ✅ ❌ ❌ ❌
2 ✅ ✅ ✅ ❌
3 ✅ ❌ ❌ ✅
=========== ========= =========== =========== ===============
"""
if self.linkedUserValue is not None:
return 3
if self.userMinimum is not None or self.userMaximum is not None:
return 2
return 1
@property
def defaultName(self) -> str:
"""Return the English name from :attr:`labelNames` or the :attr:`name`."""
return self.labelNames.get("en") or self.name
class LocationLabelDescriptor(SimpleDescriptor):
"""Container for location label data.
Analogue of OpenType's STAT data for a free-floating location (format 4).
All values are user values.
See: `OTSpec STAT Axis value table, format 4 <https://docs.microsoft.com/en-us/typography/opentype/spec/stat#axis-value-table-format-4>`_
.. versionadded:: 5.0
"""
flavor = "label"
_attrs = ("name", "elidable", "olderSibling", "userLocation", "labelNames")
def __init__(
self,
*,
name,
userLocation,
elidable=False,
olderSibling=False,
labelNames=None,
):
self.name: str = name
"""Label for this named location, STAT field ``valueNameID``."""
self.userLocation: SimpleLocationDict = userLocation or {}
"""Location in user coordinates along each axis.
If an axis is not mentioned, it is assumed to be at its default location.
.. seealso:: This may be only part of the full location. See:
:meth:`getFullUserLocation`
"""
self.elidable: bool = elidable
"""STAT flag ``ELIDABLE_AXIS_VALUE_NAME``.
See: `OTSpec STAT Flags <https://docs.microsoft.com/en-us/typography/opentype/spec/stat#flags>`_
"""
self.olderSibling: bool = olderSibling
"""STAT flag ``OLDER_SIBLING_FONT_ATTRIBUTE``.
See: `OTSpec STAT Flags <https://docs.microsoft.com/en-us/typography/opentype/spec/stat#flags>`_
"""
self.labelNames: Dict[str, str] = labelNames or {}
"""User-facing translations of this location's label. Keyed by
xml:lang code.
"""
@property
def defaultName(self) -> str:
"""Return the English name from :attr:`labelNames` or the :attr:`name`."""
return self.labelNames.get("en") or self.name
def getFullUserLocation(self, doc: "DesignSpaceDocument") -> SimpleLocationDict:
"""Get the complete user location of this label, by combining data
from the explicit user location and default axis values.
.. versionadded:: 5.0
"""
return {
axis.name: self.userLocation.get(axis.name, axis.default)
for axis in doc.axes
}
class VariableFontDescriptor(SimpleDescriptor):
"""Container for variable fonts, sub-spaces of the Designspace.
Use-cases:
- From a single DesignSpace with discrete axes, define 1 variable font
per value on the discrete axes. Before version 5, you would have needed
1 DesignSpace per such variable font, and a lot of data duplication.
- From a big variable font with many axes, define subsets of that variable
font that only include some axes and freeze other axes at a given location.
.. versionadded:: 5.0
"""
flavor = "variable-font"
_attrs = ("filename", "axisSubsets", "lib")
filename = posixpath_property("_filename")
def __init__(self, *, name, filename=None, axisSubsets=None, lib=None):
self.name: str = name
"""string, required. Name of this variable to identify it during the
build process and from other parts of the document, and also as a
filename in case the filename property is empty.
VarLib.
"""
self.filename: str = filename
"""string, optional. Relative path to the variable font file, **as it is
in the document**. The file may or may not exist.
If not specified, the :attr:`name` will be used as a basename for the file.
"""
self.axisSubsets: List[
Union[RangeAxisSubsetDescriptor, ValueAxisSubsetDescriptor]
] = (axisSubsets or [])
"""Axis subsets to include in this variable font.
If an axis is not mentioned, assume that we only want the default
location of that axis (same as a :class:`ValueAxisSubsetDescriptor`).
"""
self.lib: MutableMapping[str, Any] = lib or {}
"""Custom data associated with this variable font."""
class RangeAxisSubsetDescriptor(SimpleDescriptor):
"""Subset of a continuous axis to include in a variable font.
.. versionadded:: 5.0
"""
flavor = "axis-subset"
_attrs = ("name", "userMinimum", "userDefault", "userMaximum")
def __init__(
self, *, name, userMinimum=-math.inf, userDefault=None, userMaximum=math.inf
):
self.name: str = name
"""Name of the :class:`AxisDescriptor` to subset."""
self.userMinimum: float = userMinimum
"""New minimum value of the axis in the target variable font.
If not specified, assume the same minimum value as the full axis.
(default = ``-math.inf``)
"""
self.userDefault: Optional[float] = userDefault
"""New default value of the axis in the target variable font.
If not specified, assume the same default value as the full axis.
(default = ``None``)
"""
self.userMaximum: float = userMaximum
"""New maximum value of the axis in the target variable font.
If not specified, assume the same maximum value as the full axis.
(default = ``math.inf``)
"""
class ValueAxisSubsetDescriptor(SimpleDescriptor):
"""Single value of a discrete or continuous axis to use in a variable font.
.. versionadded:: 5.0
"""
flavor = "axis-subset"
_attrs = ("name", "userValue")
def __init__(self, *, name, userValue):
self.name: str = name
"""Name of the :class:`AxisDescriptor` or :class:`DiscreteAxisDescriptor`
to "snapshot" or "freeze".
"""
self.userValue: float = userValue
"""Value in user coordinates at which to freeze the given axis."""
class BaseDocWriter(object):
_whiteSpace = " "
axisDescriptorClass = AxisDescriptor
discreteAxisDescriptorClass = DiscreteAxisDescriptor
axisLabelDescriptorClass = AxisLabelDescriptor
axisMappingDescriptorClass = AxisMappingDescriptor
locationLabelDescriptorClass = LocationLabelDescriptor
ruleDescriptorClass = RuleDescriptor
sourceDescriptorClass = SourceDescriptor
variableFontDescriptorClass = VariableFontDescriptor
valueAxisSubsetDescriptorClass = ValueAxisSubsetDescriptor
rangeAxisSubsetDescriptorClass = RangeAxisSubsetDescriptor
instanceDescriptorClass = InstanceDescriptor
@classmethod
def getAxisDecriptor(cls):
return cls.axisDescriptorClass()
@classmethod
def getAxisMappingDescriptor(cls):
return cls.axisMappingDescriptorClass()
@classmethod
def getSourceDescriptor(cls):
return cls.sourceDescriptorClass()
@classmethod
def getInstanceDescriptor(cls):
return cls.instanceDescriptorClass()
@classmethod
def getRuleDescriptor(cls):
return cls.ruleDescriptorClass()
def __init__(self, documentPath, documentObject: DesignSpaceDocument):
self.path = documentPath
self.documentObject = documentObject
self.effectiveFormatTuple = self._getEffectiveFormatTuple()
self.root = ET.Element("designspace")
def write(self, pretty=True, encoding="UTF-8", xml_declaration=True):
self.root.attrib["format"] = ".".join(str(i) for i in self.effectiveFormatTuple)
if (
self.documentObject.axes
or self.documentObject.axisMappings
or self.documentObject.elidedFallbackName is not None
):
axesElement = ET.Element("axes")
if self.documentObject.elidedFallbackName is not None:
axesElement.attrib["elidedfallbackname"] = (
self.documentObject.elidedFallbackName
)
self.root.append(axesElement)
for axisObject in self.documentObject.axes:
self._addAxis(axisObject)
if self.documentObject.axisMappings:
mappingsElement = None
lastGroup = object()
for mappingObject in self.documentObject.axisMappings:
if getattr(mappingObject, "groupDescription", None) != lastGroup:
if mappingsElement is not None:
self.root.findall(".axes")[0].append(mappingsElement)
lastGroup = getattr(mappingObject, "groupDescription", None)
mappingsElement = ET.Element("mappings")
if lastGroup is not None:
mappingsElement.attrib["description"] = lastGroup
self._addAxisMapping(mappingsElement, mappingObject)
if mappingsElement is not None:
self.root.findall(".axes")[0].append(mappingsElement)
if self.documentObject.locationLabels:
labelsElement = ET.Element("labels")
for labelObject in self.documentObject.locationLabels:
self._addLocationLabel(labelsElement, labelObject)
self.root.append(labelsElement)
if self.documentObject.rules:
if getattr(self.documentObject, "rulesProcessingLast", False):
attributes = {"processing": "last"}
else:
attributes = {}
self.root.append(ET.Element("rules", attributes))
for ruleObject in self.documentObject.rules:
self._addRule(ruleObject)
if self.documentObject.sources:
self.root.append(ET.Element("sources"))
for sourceObject in self.documentObject.sources:
self._addSource(sourceObject)
if self.documentObject.variableFonts:
variableFontsElement = ET.Element("variable-fonts")
for variableFont in self.documentObject.variableFonts:
self._addVariableFont(variableFontsElement, variableFont)
self.root.append(variableFontsElement)
if self.documentObject.instances:
self.root.append(ET.Element("instances"))
for instanceObject in self.documentObject.instances:
self._addInstance(instanceObject)
if self.documentObject.lib:
self._addLib(self.root, self.documentObject.lib, 2)
tree = ET.ElementTree(self.root)
tree.write(
self.path,
encoding=encoding,
method="xml",
xml_declaration=xml_declaration,
pretty_print=pretty,
)
def _getEffectiveFormatTuple(self):
"""Try to use the version specified in the document, or a sufficiently
recent version to be able to encode what the document contains.
"""
minVersion = self.documentObject.formatTuple
if (
any(
hasattr(axis, "values")
or axis.axisOrdering is not None
or axis.axisLabels
for axis in self.documentObject.axes
)
or self.documentObject.locationLabels
or any(source.localisedFamilyName for source in self.documentObject.sources)
or self.documentObject.variableFonts
or any(
instance.locationLabel or instance.userLocation
for instance in self.documentObject.instances
)
):
if minVersion < (5, 0):
minVersion = (5, 0)
if self.documentObject.axisMappings:
if minVersion < (5, 1):
minVersion = (5, 1)
return minVersion
def _makeLocationElement(self, locationObject, name=None):
"""Convert Location dict to a locationElement."""
locElement = ET.Element("location")
if name is not None:
locElement.attrib["name"] = name
validatedLocation = self.documentObject.newDefaultLocation()
for axisName, axisValue in locationObject.items():
if axisName in validatedLocation:
# only accept values we know
validatedLocation[axisName] = axisValue
for dimensionName, dimensionValue in validatedLocation.items():
dimElement = ET.Element("dimension")
dimElement.attrib["name"] = dimensionName
if type(dimensionValue) == tuple:
dimElement.attrib["xvalue"] = self.intOrFloat(dimensionValue[0])
dimElement.attrib["yvalue"] = self.intOrFloat(dimensionValue[1])
else:
dimElement.attrib["xvalue"] = self.intOrFloat(dimensionValue)
locElement.append(dimElement)
return locElement, validatedLocation
def intOrFloat(self, num):
if int(num) == num:
return "%d" % num
return ("%f" % num).rstrip("0").rstrip(".")
def _addRule(self, ruleObject):
# if none of the conditions have minimum or maximum values, do not add the rule.
ruleElement = ET.Element("rule")
if ruleObject.name is not None:
ruleElement.attrib["name"] = ruleObject.name
for conditions in ruleObject.conditionSets:
conditionsetElement = ET.Element("conditionset")
for cond in conditions:
if cond.get("minimum") is None and cond.get("maximum") is None:
# neither is defined, don't add this condition
continue
conditionElement = ET.Element("condition")
conditionElement.attrib["name"] = cond.get("name")
if cond.get("minimum") is not None:
conditionElement.attrib["minimum"] = self.intOrFloat(
cond.get("minimum")
)
if cond.get("maximum") is not None:
conditionElement.attrib["maximum"] = self.intOrFloat(
cond.get("maximum")
)
conditionsetElement.append(conditionElement)
if len(conditionsetElement):
ruleElement.append(conditionsetElement)
for sub in ruleObject.subs:
subElement = ET.Element("sub")
subElement.attrib["name"] = sub[0]
subElement.attrib["with"] = sub[1]
ruleElement.append(subElement)
if len(ruleElement):
self.root.findall(".rules")[0].append(ruleElement)
def _addAxis(self, axisObject):
axisElement = ET.Element("axis")
axisElement.attrib["tag"] = axisObject.tag
axisElement.attrib["name"] = axisObject.name
self._addLabelNames(axisElement, axisObject.labelNames)
if axisObject.map:
for inputValue, outputValue in axisObject.map:
mapElement = ET.Element("map")
mapElement.attrib["input"] = self.intOrFloat(inputValue)
mapElement.attrib["output"] = self.intOrFloat(outputValue)
axisElement.append(mapElement)
if axisObject.axisOrdering or axisObject.axisLabels:
labelsElement = ET.Element("labels")
if axisObject.axisOrdering is not None:
labelsElement.attrib["ordering"] = str(axisObject.axisOrdering)
for label in axisObject.axisLabels:
self._addAxisLabel(labelsElement, label)
axisElement.append(labelsElement)
if hasattr(axisObject, "minimum"):
axisElement.attrib["minimum"] = self.intOrFloat(axisObject.minimum)
axisElement.attrib["maximum"] = self.intOrFloat(axisObject.maximum)
elif hasattr(axisObject, "values"):
axisElement.attrib["values"] = " ".join(
self.intOrFloat(v) for v in axisObject.values
)
axisElement.attrib["default"] = self.intOrFloat(axisObject.default)
if axisObject.hidden:
axisElement.attrib["hidden"] = "1"
self.root.findall(".axes")[0].append(axisElement)
def _addAxisMapping(self, mappingsElement, mappingObject):
mappingElement = ET.Element("mapping")
if getattr(mappingObject, "description", None) is not None:
mappingElement.attrib["description"] = mappingObject.description
for what in ("inputLocation", "outputLocation"):
whatObject = getattr(mappingObject, what, None)
if whatObject is None:
continue
whatElement = ET.Element(what[:-8])
mappingElement.append(whatElement)
for name, value in whatObject.items():
dimensionElement = ET.Element("dimension")
dimensionElement.attrib["name"] = name
dimensionElement.attrib["xvalue"] = self.intOrFloat(value)
whatElement.append(dimensionElement)
mappingsElement.append(mappingElement)
def _addAxisLabel(
self, axisElement: ET.Element, label: AxisLabelDescriptor
) -> None:
labelElement = ET.Element("label")
labelElement.attrib["uservalue"] = self.intOrFloat(label.userValue)
if label.userMinimum is not None:
labelElement.attrib["userminimum"] = self.intOrFloat(label.userMinimum)
if label.userMaximum is not None:
labelElement.attrib["usermaximum"] = self.intOrFloat(label.userMaximum)
labelElement.attrib["name"] = label.name
if label.elidable:
labelElement.attrib["elidable"] = "true"
if label.olderSibling:
labelElement.attrib["oldersibling"] = "true"
if label.linkedUserValue is not None:
labelElement.attrib["linkeduservalue"] = self.intOrFloat(
label.linkedUserValue
)
self._addLabelNames(labelElement, label.labelNames)
axisElement.append(labelElement)
def _addLabelNames(self, parentElement, labelNames):
for languageCode, labelName in sorted(labelNames.items()):
languageElement = ET.Element("labelname")
languageElement.attrib[XML_LANG] = languageCode
languageElement.text = labelName
parentElement.append(languageElement)
def _addLocationLabel(
self, parentElement: ET.Element, label: LocationLabelDescriptor
) -> None:
labelElement = ET.Element("label")
labelElement.attrib["name"] = label.name
if label.elidable:
labelElement.attrib["elidable"] = "true"
if label.olderSibling:
labelElement.attrib["oldersibling"] = "true"
self._addLabelNames(labelElement, label.labelNames)
self._addLocationElement(labelElement, userLocation=label.userLocation)
parentElement.append(labelElement)
def _addLocationElement(
self,
parentElement,
*,
designLocation: AnisotropicLocationDict = None,
userLocation: SimpleLocationDict = None,
):
locElement = ET.Element("location")
for axis in self.documentObject.axes:
if designLocation is not None and axis.name in designLocation:
dimElement = ET.Element("dimension")
dimElement.attrib["name"] = axis.name
value = designLocation[axis.name]
if isinstance(value, tuple):
dimElement.attrib["xvalue"] = self.intOrFloat(value[0])
dimElement.attrib["yvalue"] = self.intOrFloat(value[1])
else:
dimElement.attrib["xvalue"] = self.intOrFloat(value)
locElement.append(dimElement)
elif userLocation is not None and axis.name in userLocation:
dimElement = ET.Element("dimension")
dimElement.attrib["name"] = axis.name
value = userLocation[axis.name]
dimElement.attrib["uservalue"] = self.intOrFloat(value)
locElement.append(dimElement)
if len(locElement) > 0:
parentElement.append(locElement)
def _addInstance(self, instanceObject):
instanceElement = ET.Element("instance")
if instanceObject.name is not None:
instanceElement.attrib["name"] = instanceObject.name
if instanceObject.locationLabel is not None:
instanceElement.attrib["location"] = instanceObject.locationLabel
if instanceObject.familyName is not None:
instanceElement.attrib["familyname"] = instanceObject.familyName
if instanceObject.styleName is not None:
instanceElement.attrib["stylename"] = instanceObject.styleName
# add localisations
if instanceObject.localisedStyleName:
languageCodes = list(instanceObject.localisedStyleName.keys())
languageCodes.sort()
for code in languageCodes:
if code == "en":
continue # already stored in the element attribute
localisedStyleNameElement = ET.Element("stylename")
localisedStyleNameElement.attrib[XML_LANG] = code
localisedStyleNameElement.text = instanceObject.getStyleName(code)
instanceElement.append(localisedStyleNameElement)
if instanceObject.localisedFamilyName:
languageCodes = list(instanceObject.localisedFamilyName.keys())
languageCodes.sort()
for code in languageCodes:
if code == "en":
continue # already stored in the element attribute
localisedFamilyNameElement = ET.Element("familyname")
localisedFamilyNameElement.attrib[XML_LANG] = code
localisedFamilyNameElement.text = instanceObject.getFamilyName(code)
instanceElement.append(localisedFamilyNameElement)
if instanceObject.localisedStyleMapStyleName:
languageCodes = list(instanceObject.localisedStyleMapStyleName.keys())
languageCodes.sort()
for code in languageCodes:
if code == "en":
continue
localisedStyleMapStyleNameElement = ET.Element("stylemapstylename")
localisedStyleMapStyleNameElement.attrib[XML_LANG] = code
localisedStyleMapStyleNameElement.text = (
instanceObject.getStyleMapStyleName(code)
)
instanceElement.append(localisedStyleMapStyleNameElement)
if instanceObject.localisedStyleMapFamilyName:
languageCodes = list(instanceObject.localisedStyleMapFamilyName.keys())
languageCodes.sort()
for code in languageCodes:
if code == "en":
continue
localisedStyleMapFamilyNameElement = ET.Element("stylemapfamilyname")
localisedStyleMapFamilyNameElement.attrib[XML_LANG] = code
localisedStyleMapFamilyNameElement.text = (
instanceObject.getStyleMapFamilyName(code)
)
instanceElement.append(localisedStyleMapFamilyNameElement)
if self.effectiveFormatTuple >= (5, 0):
if instanceObject.locationLabel is None:
self._addLocationElement(
instanceElement,
designLocation=instanceObject.designLocation,
userLocation=instanceObject.userLocation,
)
else:
# Pre-version 5.0 code was validating and filling in the location
# dict while writing it out, as preserved below.
if instanceObject.location is not None:
locationElement, instanceObject.location = self._makeLocationElement(
instanceObject.location
)
instanceElement.append(locationElement)
if instanceObject.filename is not None:
instanceElement.attrib["filename"] = instanceObject.filename
if instanceObject.postScriptFontName is not None:
instanceElement.attrib["postscriptfontname"] = (
instanceObject.postScriptFontName
)
if instanceObject.styleMapFamilyName is not None:
instanceElement.attrib["stylemapfamilyname"] = (
instanceObject.styleMapFamilyName
)
if instanceObject.styleMapStyleName is not None:
instanceElement.attrib["stylemapstylename"] = (
instanceObject.styleMapStyleName
)
if self.effectiveFormatTuple < (5, 0):
# Deprecated members as of version 5.0
if instanceObject.glyphs:
if instanceElement.findall(".glyphs") == []:
glyphsElement = ET.Element("glyphs")
instanceElement.append(glyphsElement)
glyphsElement = instanceElement.findall(".glyphs")[0]
for glyphName, data in sorted(instanceObject.glyphs.items()):
glyphElement = self._writeGlyphElement(
instanceElement, instanceObject, glyphName, data
)
glyphsElement.append(glyphElement)
if instanceObject.kerning:
kerningElement = ET.Element("kerning")
instanceElement.append(kerningElement)
if instanceObject.info:
infoElement = ET.Element("info")
instanceElement.append(infoElement)
self._addLib(instanceElement, instanceObject.lib, 4)
self.root.findall(".instances")[0].append(instanceElement)
def _addSource(self, sourceObject):
sourceElement = ET.Element("source")
if sourceObject.filename is not None:
sourceElement.attrib["filename"] = sourceObject.filename
if sourceObject.name is not None:
if sourceObject.name.find("temp_master") != 0:
# do not save temporary source names
sourceElement.attrib["name"] = sourceObject.name
if sourceObject.familyName is not None:
sourceElement.attrib["familyname"] = sourceObject.familyName
if sourceObject.styleName is not None:
sourceElement.attrib["stylename"] = sourceObject.styleName
if sourceObject.layerName is not None:
sourceElement.attrib["layer"] = sourceObject.layerName
if sourceObject.localisedFamilyName:
languageCodes = list(sourceObject.localisedFamilyName.keys())
languageCodes.sort()
for code in languageCodes:
if code == "en":
continue # already stored in the element attribute
localisedFamilyNameElement = ET.Element("familyname")
localisedFamilyNameElement.attrib[XML_LANG] = code
localisedFamilyNameElement.text = sourceObject.getFamilyName(code)
sourceElement.append(localisedFamilyNameElement)
if sourceObject.copyLib:
libElement = ET.Element("lib")
libElement.attrib["copy"] = "1"
sourceElement.append(libElement)
if sourceObject.copyGroups:
groupsElement = ET.Element("groups")
groupsElement.attrib["copy"] = "1"
sourceElement.append(groupsElement)
if sourceObject.copyFeatures:
featuresElement = ET.Element("features")
featuresElement.attrib["copy"] = "1"
sourceElement.append(featuresElement)
if sourceObject.copyInfo or sourceObject.muteInfo:
infoElement = ET.Element("info")
if sourceObject.copyInfo:
infoElement.attrib["copy"] = "1"
if sourceObject.muteInfo:
infoElement.attrib["mute"] = "1"
sourceElement.append(infoElement)
if sourceObject.muteKerning:
kerningElement = ET.Element("kerning")
kerningElement.attrib["mute"] = "1"
sourceElement.append(kerningElement)
if sourceObject.mutedGlyphNames:
for name in sourceObject.mutedGlyphNames:
glyphElement = ET.Element("glyph")
glyphElement.attrib["name"] = name
glyphElement.attrib["mute"] = "1"
sourceElement.append(glyphElement)
if self.effectiveFormatTuple >= (5, 0):
self._addLocationElement(
sourceElement, designLocation=sourceObject.location
)
else:
# Pre-version 5.0 code was validating and filling in the location
# dict while writing it out, as preserved below.
locationElement, sourceObject.location = self._makeLocationElement(
sourceObject.location
)
sourceElement.append(locationElement)
self.root.findall(".sources")[0].append(sourceElement)
def _addVariableFont(
self, parentElement: ET.Element, vf: VariableFontDescriptor
) -> None:
vfElement = ET.Element("variable-font")
vfElement.attrib["name"] = vf.name
if vf.filename is not None:
vfElement.attrib["filename"] = vf.filename
if vf.axisSubsets:
subsetsElement = ET.Element("axis-subsets")
for subset in vf.axisSubsets:
subsetElement = ET.Element("axis-subset")
subsetElement.attrib["name"] = subset.name
# Mypy doesn't support narrowing union types via hasattr()
# https://mypy.readthedocs.io/en/stable/type_narrowing.html
# TODO(Python 3.10): use TypeGuard
if hasattr(subset, "userMinimum"):
subset = cast(RangeAxisSubsetDescriptor, subset)
if subset.userMinimum != -math.inf:
subsetElement.attrib["userminimum"] = self.intOrFloat(
subset.userMinimum
)
if subset.userMaximum != math.inf:
subsetElement.attrib["usermaximum"] = self.intOrFloat(
subset.userMaximum
)
if subset.userDefault is not None:
subsetElement.attrib["userdefault"] = self.intOrFloat(
subset.userDefault
)
elif hasattr(subset, "userValue"):
subset = cast(ValueAxisSubsetDescriptor, subset)
subsetElement.attrib["uservalue"] = self.intOrFloat(
subset.userValue
)
subsetsElement.append(subsetElement)
vfElement.append(subsetsElement)
self._addLib(vfElement, vf.lib, 4)
parentElement.append(vfElement)
def _addLib(self, parentElement: ET.Element, data: Any, indent_level: int) -> None:
if not data:
return
libElement = ET.Element("lib")
libElement.append(plistlib.totree(data, indent_level=indent_level))
parentElement.append(libElement)
def _writeGlyphElement(self, instanceElement, instanceObject, glyphName, data):
glyphElement = ET.Element("glyph")
if data.get("mute"):
glyphElement.attrib["mute"] = "1"
if data.get("unicodes") is not None:
glyphElement.attrib["unicode"] = " ".join(
[hex(u) for u in data.get("unicodes")]
)
if data.get("instanceLocation") is not None:
locationElement, data["instanceLocation"] = self._makeLocationElement(
data.get("instanceLocation")
)
glyphElement.append(locationElement)
if glyphName is not None:
glyphElement.attrib["name"] = glyphName
if data.get("note") is not None:
noteElement = ET.Element("note")
noteElement.text = data.get("note")
glyphElement.append(noteElement)
if data.get("masters") is not None:
mastersElement = ET.Element("masters")
for m in data.get("masters"):
masterElement = ET.Element("master")
if m.get("glyphName") is not None:
masterElement.attrib["glyphname"] = m.get("glyphName")
if m.get("font") is not None:
masterElement.attrib["source"] = m.get("font")
if m.get("location") is not None:
locationElement, m["location"] = self._makeLocationElement(
m.get("location")
)
masterElement.append(locationElement)
mastersElement.append(masterElement)
glyphElement.append(mastersElement)
return glyphElement
class BaseDocReader(LogMixin):
axisDescriptorClass = AxisDescriptor
discreteAxisDescriptorClass = DiscreteAxisDescriptor
axisLabelDescriptorClass = AxisLabelDescriptor
axisMappingDescriptorClass = AxisMappingDescriptor
locationLabelDescriptorClass = LocationLabelDescriptor
ruleDescriptorClass = RuleDescriptor
sourceDescriptorClass = SourceDescriptor
variableFontsDescriptorClass = VariableFontDescriptor
valueAxisSubsetDescriptorClass = ValueAxisSubsetDescriptor
rangeAxisSubsetDescriptorClass = RangeAxisSubsetDescriptor
instanceDescriptorClass = InstanceDescriptor
def __init__(self, documentPath, documentObject):
self.path = documentPath
self.documentObject = documentObject
tree = ET.parse(self.path)
self.root = tree.getroot()
self.documentObject.formatVersion = self.root.attrib.get("format", "3.0")
self._axes = []
self.rules = []
self.sources = []
self.instances = []
self.axisDefaults = {}
self._strictAxisNames = True
@classmethod
def fromstring(cls, string, documentObject):
f = BytesIO(tobytes(string, encoding="utf-8"))
self = cls(f, documentObject)
self.path = None
return self
def read(self):
self.readAxes()
self.readLabels()
self.readRules()
self.readVariableFonts()
self.readSources()
self.readInstances()
self.readLib()
def readRules(self):
# we also need to read any conditions that are outside of a condition set.
rules = []
rulesElement = self.root.find(".rules")
if rulesElement is not None:
processingValue = rulesElement.attrib.get("processing", "first")
if processingValue not in {"first", "last"}:
raise DesignSpaceDocumentError(
"<rules> processing attribute value is not valid: %r, "
"expected 'first' or 'last'" % processingValue
)
self.documentObject.rulesProcessingLast = processingValue == "last"
for ruleElement in self.root.findall(".rules/rule"):
ruleObject = self.ruleDescriptorClass()
ruleName = ruleObject.name = ruleElement.attrib.get("name")
# read any stray conditions outside a condition set
externalConditions = self._readConditionElements(
ruleElement,
ruleName,
)
if externalConditions:
ruleObject.conditionSets.append(externalConditions)
self.log.info(
"Found stray rule conditions outside a conditionset. "
"Wrapped them in a new conditionset."
)
# read the conditionsets
for conditionSetElement in ruleElement.findall(".conditionset"):
conditionSet = self._readConditionElements(
conditionSetElement,
ruleName,
)
if conditionSet is not None:
ruleObject.conditionSets.append(conditionSet)
for subElement in ruleElement.findall(".sub"):
a = subElement.attrib["name"]
b = subElement.attrib["with"]
ruleObject.subs.append((a, b))
rules.append(ruleObject)
self.documentObject.rules = rules
def _readConditionElements(self, parentElement, ruleName=None):
cds = []
for conditionElement in parentElement.findall(".condition"):
cd = {}
cdMin = conditionElement.attrib.get("minimum")
if cdMin is not None:
cd["minimum"] = float(cdMin)
else:
# will allow these to be None, assume axis.minimum
cd["minimum"] = None
cdMax = conditionElement.attrib.get("maximum")
if cdMax is not None:
cd["maximum"] = float(cdMax)
else:
# will allow these to be None, assume axis.maximum
cd["maximum"] = None
cd["name"] = conditionElement.attrib.get("name")
# # test for things
if cd.get("minimum") is None and cd.get("maximum") is None:
raise DesignSpaceDocumentError(
"condition missing required minimum or maximum in rule"
+ (" '%s'" % ruleName if ruleName is not None else "")
)
cds.append(cd)
return cds
def readAxes(self):
# read the axes elements, including the warp map.
axesElement = self.root.find(".axes")
if axesElement is not None and "elidedfallbackname" in axesElement.attrib:
self.documentObject.elidedFallbackName = axesElement.attrib[
"elidedfallbackname"
]
axisElements = self.root.findall(".axes/axis")
if not axisElements:
return
for axisElement in axisElements:
if (
self.documentObject.formatTuple >= (5, 0)
and "values" in axisElement.attrib
):
axisObject = self.discreteAxisDescriptorClass()
axisObject.values = [
float(s) for s in axisElement.attrib["values"].split(" ")
]
else:
axisObject = self.axisDescriptorClass()
axisObject.minimum = float(axisElement.attrib.get("minimum"))
axisObject.maximum = float(axisElement.attrib.get("maximum"))
axisObject.default = float(axisElement.attrib.get("default"))
axisObject.name = axisElement.attrib.get("name")
if axisElement.attrib.get("hidden", False):
axisObject.hidden = True
axisObject.tag = axisElement.attrib.get("tag")
for mapElement in axisElement.findall("map"):
a = float(mapElement.attrib["input"])
b = float(mapElement.attrib["output"])
axisObject.map.append((a, b))
for labelNameElement in axisElement.findall("labelname"):
# Note: elementtree reads the "xml:lang" attribute name as
# '{http://www.w3.org/XML/1998/namespace}lang'
for key, lang in labelNameElement.items():
if key == XML_LANG:
axisObject.labelNames[lang] = tostr(labelNameElement.text)
labelElement = axisElement.find(".labels")
if labelElement is not None:
if "ordering" in labelElement.attrib:
axisObject.axisOrdering = int(labelElement.attrib["ordering"])
for label in labelElement.findall(".label"):
axisObject.axisLabels.append(self.readAxisLabel(label))
self.documentObject.axes.append(axisObject)
self.axisDefaults[axisObject.name] = axisObject.default
self.documentObject.axisMappings = []
for mappingsElement in self.root.findall(".axes/mappings"):
groupDescription = mappingsElement.attrib.get("description")
for mappingElement in mappingsElement.findall("mapping"):
description = mappingElement.attrib.get("description")
inputElement = mappingElement.find("input")
outputElement = mappingElement.find("output")
inputLoc = {}
outputLoc = {}
for dimElement in inputElement.findall(".dimension"):
name = dimElement.attrib["name"]
value = float(dimElement.attrib["xvalue"])
inputLoc[name] = value
for dimElement in outputElement.findall(".dimension"):
name = dimElement.attrib["name"]
value = float(dimElement.attrib["xvalue"])
outputLoc[name] = value
axisMappingObject = self.axisMappingDescriptorClass(
inputLocation=inputLoc,
outputLocation=outputLoc,
description=description,
groupDescription=groupDescription,
)
self.documentObject.axisMappings.append(axisMappingObject)
def readAxisLabel(self, element: ET.Element):
xml_attrs = {
"userminimum",
"uservalue",
"usermaximum",
"name",
"elidable",
"oldersibling",
"linkeduservalue",
}
unknown_attrs = set(element.attrib) - xml_attrs
if unknown_attrs:
raise DesignSpaceDocumentError(
f"label element contains unknown attributes: {', '.join(unknown_attrs)}"
)
name = element.get("name")
if name is None:
raise DesignSpaceDocumentError("label element must have a name attribute.")
valueStr = element.get("uservalue")
if valueStr is None:
raise DesignSpaceDocumentError(
"label element must have a uservalue attribute."
)
value = float(valueStr)
minimumStr = element.get("userminimum")
minimum = float(minimumStr) if minimumStr is not None else None
maximumStr = element.get("usermaximum")
maximum = float(maximumStr) if maximumStr is not None else None
linkedValueStr = element.get("linkeduservalue")
linkedValue = float(linkedValueStr) if linkedValueStr is not None else None
elidable = True if element.get("elidable") == "true" else False
olderSibling = True if element.get("oldersibling") == "true" else False
labelNames = {
lang: label_name.text or ""
for label_name in element.findall("labelname")
for attr, lang in label_name.items()
if attr == XML_LANG
# Note: elementtree reads the "xml:lang" attribute name as
# '{http://www.w3.org/XML/1998/namespace}lang'
}
return self.axisLabelDescriptorClass(
name=name,
userValue=value,
userMinimum=minimum,
userMaximum=maximum,
elidable=elidable,
olderSibling=olderSibling,
linkedUserValue=linkedValue,
labelNames=labelNames,
)
def readLabels(self):
if self.documentObject.formatTuple < (5, 0):
return
xml_attrs = {"name", "elidable", "oldersibling"}
for labelElement in self.root.findall(".labels/label"):
unknown_attrs = set(labelElement.attrib) - xml_attrs
if unknown_attrs:
raise DesignSpaceDocumentError(
f"Label element contains unknown attributes: {', '.join(unknown_attrs)}"
)
name = labelElement.get("name")
if name is None:
raise DesignSpaceDocumentError(
"label element must have a name attribute."
)
designLocation, userLocation = self.locationFromElement(labelElement)
if designLocation:
raise DesignSpaceDocumentError(
f'<label> element "{name}" must only have user locations (using uservalue="").'
)
elidable = True if labelElement.get("elidable") == "true" else False
olderSibling = True if labelElement.get("oldersibling") == "true" else False
labelNames = {
lang: label_name.text or ""
for label_name in labelElement.findall("labelname")
for attr, lang in label_name.items()
if attr == XML_LANG
# Note: elementtree reads the "xml:lang" attribute name as
# '{http://www.w3.org/XML/1998/namespace}lang'
}
locationLabel = self.locationLabelDescriptorClass(
name=name,
userLocation=userLocation,
elidable=elidable,
olderSibling=olderSibling,
labelNames=labelNames,
)
self.documentObject.locationLabels.append(locationLabel)
def readVariableFonts(self):
if self.documentObject.formatTuple < (5, 0):
return
xml_attrs = {"name", "filename"}
for variableFontElement in self.root.findall(".variable-fonts/variable-font"):
unknown_attrs = set(variableFontElement.attrib) - xml_attrs
if unknown_attrs:
raise DesignSpaceDocumentError(
f"variable-font element contains unknown attributes: {', '.join(unknown_attrs)}"
)
name = variableFontElement.get("name")
if name is None:
raise DesignSpaceDocumentError(
"variable-font element must have a name attribute."
)
filename = variableFontElement.get("filename")
axisSubsetsElement = variableFontElement.find(".axis-subsets")
if axisSubsetsElement is None:
raise DesignSpaceDocumentError(
"variable-font element must contain an axis-subsets element."
)
axisSubsets = []
for axisSubset in axisSubsetsElement.iterfind(".axis-subset"):
axisSubsets.append(self.readAxisSubset(axisSubset))
lib = None
libElement = variableFontElement.find(".lib")
if libElement is not None:
lib = plistlib.fromtree(libElement[0])
variableFont = self.variableFontsDescriptorClass(
name=name,
filename=filename,
axisSubsets=axisSubsets,
lib=lib,
)
self.documentObject.variableFonts.append(variableFont)
def readAxisSubset(self, element: ET.Element):
if "uservalue" in element.attrib:
xml_attrs = {"name", "uservalue"}
unknown_attrs = set(element.attrib) - xml_attrs
if unknown_attrs:
raise DesignSpaceDocumentError(
f"axis-subset element contains unknown attributes: {', '.join(unknown_attrs)}"
)
name = element.get("name")
if name is None:
raise DesignSpaceDocumentError(
"axis-subset element must have a name attribute."
)
userValueStr = element.get("uservalue")
if userValueStr is None:
raise DesignSpaceDocumentError(
"The axis-subset element for a discrete subset must have a uservalue attribute."
)
userValue = float(userValueStr)
return self.valueAxisSubsetDescriptorClass(name=name, userValue=userValue)
else:
xml_attrs = {"name", "userminimum", "userdefault", "usermaximum"}
unknown_attrs = set(element.attrib) - xml_attrs
if unknown_attrs:
raise DesignSpaceDocumentError(
f"axis-subset element contains unknown attributes: {', '.join(unknown_attrs)}"
)
name = element.get("name")
if name is None:
raise DesignSpaceDocumentError(
"axis-subset element must have a name attribute."
)
userMinimum = element.get("userminimum")
userDefault = element.get("userdefault")
userMaximum = element.get("usermaximum")
if (
userMinimum is not None
and userDefault is not None
and userMaximum is not None
):
return self.rangeAxisSubsetDescriptorClass(
name=name,
userMinimum=float(userMinimum),
userDefault=float(userDefault),
userMaximum=float(userMaximum),
)
if all(v is None for v in (userMinimum, userDefault, userMaximum)):
return self.rangeAxisSubsetDescriptorClass(name=name)
raise DesignSpaceDocumentError(
"axis-subset element must have min/max/default values or none at all."
)
def readSources(self):
for sourceCount, sourceElement in enumerate(
self.root.findall(".sources/source")
):
filename = sourceElement.attrib.get("filename")
if filename is not None and self.path is not None:
sourcePath = os.path.abspath(
os.path.join(os.path.dirname(self.path), filename)
)
else:
sourcePath = None
sourceName = sourceElement.attrib.get("name")
if sourceName is None:
# add a temporary source name
sourceName = "temp_master.%d" % (sourceCount)
sourceObject = self.sourceDescriptorClass()
sourceObject.path = sourcePath # absolute path to the ufo source
sourceObject.filename = filename # path as it is stored in the document
sourceObject.name = sourceName
familyName = sourceElement.attrib.get("familyname")
if familyName is not None:
sourceObject.familyName = familyName
styleName = sourceElement.attrib.get("stylename")
if styleName is not None:
sourceObject.styleName = styleName
for familyNameElement in sourceElement.findall("familyname"):
for key, lang in familyNameElement.items():
if key == XML_LANG:
familyName = familyNameElement.text
sourceObject.setFamilyName(familyName, lang)
designLocation, userLocation = self.locationFromElement(sourceElement)
if userLocation:
raise DesignSpaceDocumentError(
f'<source> element "{sourceName}" must only have design locations (using xvalue="").'
)
sourceObject.location = designLocation
layerName = sourceElement.attrib.get("layer")
if layerName is not None:
sourceObject.layerName = layerName
for libElement in sourceElement.findall(".lib"):
if libElement.attrib.get("copy") == "1":
sourceObject.copyLib = True
for groupsElement in sourceElement.findall(".groups"):
if groupsElement.attrib.get("copy") == "1":
sourceObject.copyGroups = True
for infoElement in sourceElement.findall(".info"):
if infoElement.attrib.get("copy") == "1":
sourceObject.copyInfo = True
if infoElement.attrib.get("mute") == "1":
sourceObject.muteInfo = True
for featuresElement in sourceElement.findall(".features"):
if featuresElement.attrib.get("copy") == "1":
sourceObject.copyFeatures = True
for glyphElement in sourceElement.findall(".glyph"):
glyphName = glyphElement.attrib.get("name")
if glyphName is None:
continue
if glyphElement.attrib.get("mute") == "1":
sourceObject.mutedGlyphNames.append(glyphName)
for kerningElement in sourceElement.findall(".kerning"):
if kerningElement.attrib.get("mute") == "1":
sourceObject.muteKerning = True
self.documentObject.sources.append(sourceObject)
def locationFromElement(self, element):
"""Read a nested ``<location>`` element inside the given ``element``.
.. versionchanged:: 5.0
Return a tuple of (designLocation, userLocation)
"""
elementLocation = (None, None)
for locationElement in element.findall(".location"):
elementLocation = self.readLocationElement(locationElement)
break
return elementLocation
def readLocationElement(self, locationElement):
"""Read a ``<location>`` element.
.. versionchanged:: 5.0
Return a tuple of (designLocation, userLocation)
"""
if self._strictAxisNames and not self.documentObject.axes:
raise DesignSpaceDocumentError("No axes defined")
userLoc = {}
designLoc = {}
for dimensionElement in locationElement.findall(".dimension"):
dimName = dimensionElement.attrib.get("name")
if self._strictAxisNames and dimName not in self.axisDefaults:
# In case the document contains no axis definitions,
self.log.warning('Location with undefined axis: "%s".', dimName)
continue
userValue = xValue = yValue = None
try:
userValue = dimensionElement.attrib.get("uservalue")
if userValue is not None:
userValue = float(userValue)
except ValueError:
self.log.warning(
"ValueError in readLocation userValue %3.3f", userValue
)
try:
xValue = dimensionElement.attrib.get("xvalue")
if xValue is not None:
xValue = float(xValue)
except ValueError:
self.log.warning("ValueError in readLocation xValue %3.3f", xValue)
try:
yValue = dimensionElement.attrib.get("yvalue")
if yValue is not None:
yValue = float(yValue)
except ValueError:
self.log.warning("ValueError in readLocation yValue %3.3f", yValue)
if userValue is None == xValue is None:
raise DesignSpaceDocumentError(
f'Exactly one of uservalue="" or xvalue="" must be provided for location dimension "{dimName}"'
)
if yValue is not None:
if xValue is None:
raise DesignSpaceDocumentError(
f'Missing xvalue="" for the location dimension "{dimName}"" with yvalue="{yValue}"'
)
designLoc[dimName] = (xValue, yValue)
elif xValue is not None:
designLoc[dimName] = xValue
else:
userLoc[dimName] = userValue
return designLoc, userLoc
def readInstances(self, makeGlyphs=True, makeKerning=True, makeInfo=True):
instanceElements = self.root.findall(".instances/instance")
for instanceElement in instanceElements:
self._readSingleInstanceElement(
instanceElement,
makeGlyphs=makeGlyphs,
makeKerning=makeKerning,
makeInfo=makeInfo,
)
def _readSingleInstanceElement(
self, instanceElement, makeGlyphs=True, makeKerning=True, makeInfo=True
):
filename = instanceElement.attrib.get("filename")
if filename is not None and self.documentObject.path is not None:
instancePath = os.path.join(
os.path.dirname(self.documentObject.path), filename
)
else:
instancePath = None
instanceObject = self.instanceDescriptorClass()
instanceObject.path = instancePath # absolute path to the instance
instanceObject.filename = filename # path as it is stored in the document
name = instanceElement.attrib.get("name")
if name is not None:
instanceObject.name = name
familyname = instanceElement.attrib.get("familyname")
if familyname is not None:
instanceObject.familyName = familyname
stylename = instanceElement.attrib.get("stylename")
if stylename is not None:
instanceObject.styleName = stylename
postScriptFontName = instanceElement.attrib.get("postscriptfontname")
if postScriptFontName is not None:
instanceObject.postScriptFontName = postScriptFontName
styleMapFamilyName = instanceElement.attrib.get("stylemapfamilyname")
if styleMapFamilyName is not None:
instanceObject.styleMapFamilyName = styleMapFamilyName
styleMapStyleName = instanceElement.attrib.get("stylemapstylename")
if styleMapStyleName is not None:
instanceObject.styleMapStyleName = styleMapStyleName
# read localised names
for styleNameElement in instanceElement.findall("stylename"):
for key, lang in styleNameElement.items():
if key == XML_LANG:
styleName = styleNameElement.text
instanceObject.setStyleName(styleName, lang)
for familyNameElement in instanceElement.findall("familyname"):
for key, lang in familyNameElement.items():
if key == XML_LANG:
familyName = familyNameElement.text
instanceObject.setFamilyName(familyName, lang)
for styleMapStyleNameElement in instanceElement.findall("stylemapstylename"):
for key, lang in styleMapStyleNameElement.items():
if key == XML_LANG:
styleMapStyleName = styleMapStyleNameElement.text
instanceObject.setStyleMapStyleName(styleMapStyleName, lang)
for styleMapFamilyNameElement in instanceElement.findall("stylemapfamilyname"):
for key, lang in styleMapFamilyNameElement.items():
if key == XML_LANG:
styleMapFamilyName = styleMapFamilyNameElement.text
instanceObject.setStyleMapFamilyName(styleMapFamilyName, lang)
designLocation, userLocation = self.locationFromElement(instanceElement)
locationLabel = instanceElement.attrib.get("location")
if (designLocation or userLocation) and locationLabel is not None:
raise DesignSpaceDocumentError(
'instance element must have at most one of the location="..." attribute or the nested location element'
)
instanceObject.locationLabel = locationLabel
instanceObject.userLocation = userLocation or {}
instanceObject.designLocation = designLocation or {}
for glyphElement in instanceElement.findall(".glyphs/glyph"):
self.readGlyphElement(glyphElement, instanceObject)
for infoElement in instanceElement.findall("info"):
self.readInfoElement(infoElement, instanceObject)
for libElement in instanceElement.findall("lib"):
self.readLibElement(libElement, instanceObject)
self.documentObject.instances.append(instanceObject)
def readLibElement(self, libElement, instanceObject):
"""Read the lib element for the given instance."""
instanceObject.lib = plistlib.fromtree(libElement[0])
def readInfoElement(self, infoElement, instanceObject):
"""Read the info element."""
instanceObject.info = True
def readGlyphElement(self, glyphElement, instanceObject):
"""
Read the glyph element, which could look like either one of these:
.. code-block:: xml
<glyph name="b" unicode="0x62"/>
<glyph name="b"/>
<glyph name="b">
<master location="location-token-bbb" source="master-token-aaa2"/>
<master glyphname="b.alt1" location="location-token-ccc" source="master-token-aaa3"/>
<note>
This is an instance from an anisotropic interpolation.
</note>
</glyph>
"""
glyphData = {}
glyphName = glyphElement.attrib.get("name")
if glyphName is None:
raise DesignSpaceDocumentError("Glyph object without name attribute")
mute = glyphElement.attrib.get("mute")
if mute == "1":
glyphData["mute"] = True
# unicode
unicodes = glyphElement.attrib.get("unicode")
if unicodes is not None:
try:
unicodes = [int(u, 16) for u in unicodes.split(" ")]
glyphData["unicodes"] = unicodes
except ValueError:
raise DesignSpaceDocumentError(
"unicode values %s are not integers" % unicodes
)
for noteElement in glyphElement.findall(".note"):
glyphData["note"] = noteElement.text
break
designLocation, userLocation = self.locationFromElement(glyphElement)
if userLocation:
raise DesignSpaceDocumentError(
f'<glyph> element "{glyphName}" must only have design locations (using xvalue="").'
)
if designLocation is not None:
glyphData["instanceLocation"] = designLocation
glyphSources = None
for masterElement in glyphElement.findall(".masters/master"):
fontSourceName = masterElement.attrib.get("source")
designLocation, userLocation = self.locationFromElement(masterElement)
if userLocation:
raise DesignSpaceDocumentError(
f'<master> element "{fontSourceName}" must only have design locations (using xvalue="").'
)
masterGlyphName = masterElement.attrib.get("glyphname")
if masterGlyphName is None:
# if we don't read a glyphname, use the one we have
masterGlyphName = glyphName
d = dict(
font=fontSourceName, location=designLocation, glyphName=masterGlyphName
)
if glyphSources is None:
glyphSources = []
glyphSources.append(d)
if glyphSources is not None:
glyphData["masters"] = glyphSources
instanceObject.glyphs[glyphName] = glyphData
def readLib(self):
"""Read the lib element for the whole document."""
for libElement in self.root.findall(".lib"):
self.documentObject.lib = plistlib.fromtree(libElement[0])
class DesignSpaceDocument(LogMixin, AsDictMixin):
"""The DesignSpaceDocument object can read and write ``.designspace`` data.
It imports the axes, sources, variable fonts and instances to very basic
**descriptor** objects that store the data in attributes. Data is added to
the document by creating such descriptor objects, filling them with data
and then adding them to the document. This makes it easy to integrate this
object in different contexts.
The **DesignSpaceDocument** object can be subclassed to work with
different objects, as long as they have the same attributes. Reader and
Writer objects can be subclassed as well.
**Note:** Python attribute names are usually camelCased, the
corresponding `XML <document-xml-structure>`_ attributes are usually
all lowercase.
.. code:: python
from fontTools.designspaceLib import DesignSpaceDocument
doc = DesignSpaceDocument.fromfile("some/path/to/my.designspace")
doc.formatVersion
doc.elidedFallbackName
doc.axes
doc.axisMappings
doc.locationLabels
doc.rules
doc.rulesProcessingLast
doc.sources
doc.variableFonts
doc.instances
doc.lib
"""
def __init__(self, readerClass=None, writerClass=None):
self.path = None
"""String, optional. When the document is read from the disk, this is
the full path that was given to :meth:`read` or :meth:`fromfile`.
"""
self.filename = None
"""String, optional. When the document is read from the disk, this is
its original file name, i.e. the last part of its path.
When the document is produced by a Python script and still only exists
in memory, the producing script can write here an indication of a
possible "good" filename, in case one wants to save the file somewhere.
"""
self.formatVersion: Optional[str] = None
"""Format version for this document, as a string. E.g. "4.0" """
self.elidedFallbackName: Optional[str] = None
"""STAT Style Attributes Header field ``elidedFallbackNameID``.
See: `OTSpec STAT Style Attributes Header <https://docs.microsoft.com/en-us/typography/opentype/spec/stat#style-attributes-header>`_
.. versionadded:: 5.0
"""
self.axes: List[Union[AxisDescriptor, DiscreteAxisDescriptor]] = []
"""List of this document's axes."""
self.axisMappings: List[AxisMappingDescriptor] = []
"""List of this document's axis mappings."""
self.locationLabels: List[LocationLabelDescriptor] = []
"""List of this document's STAT format 4 labels.
.. versionadded:: 5.0"""
self.rules: List[RuleDescriptor] = []
"""List of this document's rules."""
self.rulesProcessingLast: bool = False
"""This flag indicates whether the substitution rules should be applied
before or after other glyph substitution features.
- False: before
- True: after.
Default is False. For new projects, you probably want True. See
the following issues for more information:
`fontTools#1371 <https://github.com/fonttools/fonttools/issues/1371#issuecomment-590214572>`__
`fontTools#2050 <https://github.com/fonttools/fonttools/issues/2050#issuecomment-678691020>`__
If you want to use a different feature altogether, e.g. ``calt``,
use the lib key ``com.github.fonttools.varLib.featureVarsFeatureTag``
.. code:: xml
<lib>
<dict>
<key>com.github.fonttools.varLib.featureVarsFeatureTag</key>
<string>calt</string>
</dict>
</lib>
"""
self.sources: List[SourceDescriptor] = []
"""List of this document's sources."""
self.variableFonts: List[VariableFontDescriptor] = []
"""List of this document's variable fonts.
.. versionadded:: 5.0"""
self.instances: List[InstanceDescriptor] = []
"""List of this document's instances."""
self.lib: Dict = {}
"""User defined, custom data associated with the whole document.
Use reverse-DNS notation to identify your own data.
Respect the data stored by others.
"""
self.default: Optional[str] = None
"""Name of the default master.
This attribute is updated by the :meth:`findDefault`
"""
if readerClass is not None:
self.readerClass = readerClass
else:
self.readerClass = BaseDocReader
if writerClass is not None:
self.writerClass = writerClass
else:
self.writerClass = BaseDocWriter
@classmethod
def fromfile(cls, path, readerClass=None, writerClass=None):
"""Read a designspace file from ``path`` and return a new instance of
:class:.
"""
self = cls(readerClass=readerClass, writerClass=writerClass)
self.read(path)
return self
@classmethod
def fromstring(cls, string, readerClass=None, writerClass=None):
self = cls(readerClass=readerClass, writerClass=writerClass)
reader = self.readerClass.fromstring(string, self)
reader.read()
if self.sources:
self.findDefault()
return self
def tostring(self, encoding=None):
"""Returns the designspace as a string. Default encoding ``utf-8``."""
if encoding is str or (encoding is not None and encoding.lower() == "unicode"):
f = StringIO()
xml_declaration = False
elif encoding is None or encoding == "utf-8":
f = BytesIO()
encoding = "UTF-8"
xml_declaration = True
else:
raise ValueError("unsupported encoding: '%s'" % encoding)
writer = self.writerClass(f, self)
writer.write(encoding=encoding, xml_declaration=xml_declaration)
return f.getvalue()
def read(self, path):
"""Read a designspace file from ``path`` and populates the fields of
``self`` with the data.
"""
if hasattr(path, "__fspath__"): # support os.PathLike objects
path = path.__fspath__()
self.path = path
self.filename = os.path.basename(path)
reader = self.readerClass(path, self)
reader.read()
if self.sources:
self.findDefault()
def write(self, path):
"""Write this designspace to ``path``."""
if hasattr(path, "__fspath__"): # support os.PathLike objects
path = path.__fspath__()
self.path = path
self.filename = os.path.basename(path)
self.updatePaths()
writer = self.writerClass(path, self)
writer.write()
def _posixRelativePath(self, otherPath):
relative = os.path.relpath(otherPath, os.path.dirname(self.path))
return posix(relative)
def updatePaths(self):
"""
Right before we save we need to identify and respond to the following situations:
In each descriptor, we have to do the right thing for the filename attribute.
::
case 1.
descriptor.filename == None
descriptor.path == None
-- action:
write as is, descriptors will not have a filename attr.
useless, but no reason to interfere.
case 2.
descriptor.filename == "../something"
descriptor.path == None
-- action:
write as is. The filename attr should not be touched.
case 3.
descriptor.filename == None
descriptor.path == "~/absolute/path/there"
-- action:
calculate the relative path for filename.
We're not overwriting some other value for filename, it should be fine
case 4.
descriptor.filename == '../somewhere'
descriptor.path == "~/absolute/path/there"
-- action:
there is a conflict between the given filename, and the path.
So we know where the file is relative to the document.
Can't guess why they're different, we just choose for path to be correct and update filename.
"""
assert self.path is not None
for descriptor in self.sources + self.instances:
if descriptor.path is not None:
# case 3 and 4: filename gets updated and relativized
descriptor.filename = self._posixRelativePath(descriptor.path)
def addSource(self, sourceDescriptor: SourceDescriptor):
"""Add the given ``sourceDescriptor`` to ``doc.sources``."""
self.sources.append(sourceDescriptor)
def addSourceDescriptor(self, **kwargs):
"""Instantiate a new :class:`SourceDescriptor` using the given
``kwargs`` and add it to ``doc.sources``.
"""
source = self.writerClass.sourceDescriptorClass(**kwargs)
self.addSource(source)
return source
def addInstance(self, instanceDescriptor: InstanceDescriptor):
"""Add the given ``instanceDescriptor`` to :attr:`instances`."""
self.instances.append(instanceDescriptor)
def addInstanceDescriptor(self, **kwargs):
"""Instantiate a new :class:`InstanceDescriptor` using the given
``kwargs`` and add it to :attr:`instances`.
"""
instance = self.writerClass.instanceDescriptorClass(**kwargs)
self.addInstance(instance)
return instance
def addAxis(self, axisDescriptor: Union[AxisDescriptor, DiscreteAxisDescriptor]):
"""Add the given ``axisDescriptor`` to :attr:`axes`."""
self.axes.append(axisDescriptor)
def addAxisDescriptor(self, **kwargs):
"""Instantiate a new :class:`AxisDescriptor` using the given
``kwargs`` and add it to :attr:`axes`.
The axis will be and instance of :class:`DiscreteAxisDescriptor` if
the ``kwargs`` provide a ``value``, or a :class:`AxisDescriptor` otherwise.
"""
if "values" in kwargs:
axis = self.writerClass.discreteAxisDescriptorClass(**kwargs)
else:
axis = self.writerClass.axisDescriptorClass(**kwargs)
self.addAxis(axis)
return axis
def addAxisMapping(self, axisMappingDescriptor: AxisMappingDescriptor):
"""Add the given ``axisMappingDescriptor`` to :attr:`axisMappings`."""
self.axisMappings.append(axisMappingDescriptor)
def addAxisMappingDescriptor(self, **kwargs):
"""Instantiate a new :class:`AxisMappingDescriptor` using the given
``kwargs`` and add it to :attr:`rules`.
"""
axisMapping = self.writerClass.axisMappingDescriptorClass(**kwargs)
self.addAxisMapping(axisMapping)
return axisMapping
def addRule(self, ruleDescriptor: RuleDescriptor):
"""Add the given ``ruleDescriptor`` to :attr:`rules`."""
self.rules.append(ruleDescriptor)
def addRuleDescriptor(self, **kwargs):
"""Instantiate a new :class:`RuleDescriptor` using the given
``kwargs`` and add it to :attr:`rules`.
"""
rule = self.writerClass.ruleDescriptorClass(**kwargs)
self.addRule(rule)
return rule
def addVariableFont(self, variableFontDescriptor: VariableFontDescriptor):
"""Add the given ``variableFontDescriptor`` to :attr:`variableFonts`.
.. versionadded:: 5.0
"""
self.variableFonts.append(variableFontDescriptor)
def addVariableFontDescriptor(self, **kwargs):
"""Instantiate a new :class:`VariableFontDescriptor` using the given
``kwargs`` and add it to :attr:`variableFonts`.
.. versionadded:: 5.0
"""
variableFont = self.writerClass.variableFontDescriptorClass(**kwargs)
self.addVariableFont(variableFont)
return variableFont
def addLocationLabel(self, locationLabelDescriptor: LocationLabelDescriptor):
"""Add the given ``locationLabelDescriptor`` to :attr:`locationLabels`.
.. versionadded:: 5.0
"""
self.locationLabels.append(locationLabelDescriptor)
def addLocationLabelDescriptor(self, **kwargs):
"""Instantiate a new :class:`LocationLabelDescriptor` using the given
``kwargs`` and add it to :attr:`locationLabels`.
.. versionadded:: 5.0
"""
locationLabel = self.writerClass.locationLabelDescriptorClass(**kwargs)
self.addLocationLabel(locationLabel)
return locationLabel
def newDefaultLocation(self):
"""Return a dict with the default location in design space coordinates."""
# Without OrderedDict, output XML would be non-deterministic.
# https://github.com/LettError/designSpaceDocument/issues/10
loc = collections.OrderedDict()
for axisDescriptor in self.axes:
loc[axisDescriptor.name] = axisDescriptor.map_forward(
axisDescriptor.default
)
return loc
def labelForUserLocation(
self, userLocation: SimpleLocationDict
) -> Optional[LocationLabelDescriptor]:
"""Return the :class:`LocationLabel` that matches the given
``userLocation``, or ``None`` if no such label exists.
.. versionadded:: 5.0
"""
return next(
(
label
for label in self.locationLabels
if label.userLocation == userLocation
),
None,
)
def updateFilenameFromPath(self, masters=True, instances=True, force=False):
"""Set a descriptor filename attr from the path and this document path.
If the filename attribute is not None: skip it.
"""
if masters:
for descriptor in self.sources:
if descriptor.filename is not None and not force:
continue
if self.path is not None:
descriptor.filename = self._posixRelativePath(descriptor.path)
if instances:
for descriptor in self.instances:
if descriptor.filename is not None and not force:
continue
if self.path is not None:
descriptor.filename = self._posixRelativePath(descriptor.path)
def newAxisDescriptor(self):
"""Ask the writer class to make us a new axisDescriptor."""
return self.writerClass.getAxisDecriptor()
def newSourceDescriptor(self):
"""Ask the writer class to make us a new sourceDescriptor."""
return self.writerClass.getSourceDescriptor()
def newInstanceDescriptor(self):
"""Ask the writer class to make us a new instanceDescriptor."""
return self.writerClass.getInstanceDescriptor()
def getAxisOrder(self):
"""Return a list of axis names, in the same order as defined in the document."""
names = []
for axisDescriptor in self.axes:
names.append(axisDescriptor.name)
return names
def getAxis(self, name: str) -> AxisDescriptor | DiscreteAxisDescriptor | None:
"""Return the axis with the given ``name``, or ``None`` if no such axis exists."""
return next((axis for axis in self.axes if axis.name == name), None)
def getAxisByTag(self, tag: str) -> AxisDescriptor | DiscreteAxisDescriptor | None:
"""Return the axis with the given ``tag``, or ``None`` if no such axis exists."""
return next((axis for axis in self.axes if axis.tag == tag), None)
def getLocationLabel(self, name: str) -> Optional[LocationLabelDescriptor]:
"""Return the top-level location label with the given ``name``, or
``None`` if no such label exists.
.. versionadded:: 5.0
"""
for label in self.locationLabels:
if label.name == name:
return label
return None
def map_forward(self, userLocation: SimpleLocationDict) -> SimpleLocationDict:
"""Map a user location to a design location.
Assume that missing coordinates are at the default location for that axis.
Note: the output won't be anisotropic, only the xvalue is set.
.. versionadded:: 5.0
"""
return {
axis.name: axis.map_forward(userLocation.get(axis.name, axis.default))
for axis in self.axes
}
def map_backward(
self, designLocation: AnisotropicLocationDict
) -> SimpleLocationDict:
"""Map a design location to a user location.
Assume that missing coordinates are at the default location for that axis.
When the input has anisotropic locations, only the xvalue is used.
.. versionadded:: 5.0
"""
return {
axis.name: (
axis.map_backward(designLocation[axis.name])
if axis.name in designLocation
else axis.default
)
for axis in self.axes
}
def findDefault(self):
"""Set and return SourceDescriptor at the default location or None.
The default location is the set of all `default` values in user space
of all axes.
This function updates the document's :attr:`default` value.
.. versionchanged:: 5.0
Allow the default source to not specify some of the axis values, and
they are assumed to be the default.
See :meth:`SourceDescriptor.getFullDesignLocation()`
"""
self.default = None
# Convert the default location from user space to design space before comparing
# it against the SourceDescriptor locations (always in design space).
defaultDesignLocation = self.newDefaultLocation()
for sourceDescriptor in self.sources:
if sourceDescriptor.getFullDesignLocation(self) == defaultDesignLocation:
self.default = sourceDescriptor
return sourceDescriptor
return None
def normalizeLocation(self, location):
"""Return a dict with normalized axis values."""
from fontTools.varLib.models import normalizeValue
new = {}
for axis in self.axes:
if axis.name not in location:
# skipping this dimension it seems
continue
value = location[axis.name]
# 'anisotropic' location, take first coord only
if isinstance(value, tuple):
value = value[0]
triple = [
axis.map_forward(v) for v in (axis.minimum, axis.default, axis.maximum)
]
new[axis.name] = normalizeValue(value, triple)
return new
def normalize(self):
"""
Normalise the geometry of this designspace:
- scale all the locations of all masters and instances to the -1 - 0 - 1 value.
- we need the axis data to do the scaling, so we do those last.
"""
# masters
for item in self.sources:
item.location = self.normalizeLocation(item.location)
# instances
for item in self.instances:
# glyph masters for this instance
for _, glyphData in item.glyphs.items():
glyphData["instanceLocation"] = self.normalizeLocation(
glyphData["instanceLocation"]
)
for glyphMaster in glyphData["masters"]:
glyphMaster["location"] = self.normalizeLocation(
glyphMaster["location"]
)
item.location = self.normalizeLocation(item.location)
# the axes
for axis in self.axes:
# scale the map first
newMap = []
for inputValue, outputValue in axis.map:
newOutputValue = self.normalizeLocation({axis.name: outputValue}).get(
axis.name
)
newMap.append((inputValue, newOutputValue))
if newMap:
axis.map = newMap
# finally the axis values
minimum = self.normalizeLocation({axis.name: axis.minimum}).get(axis.name)
maximum = self.normalizeLocation({axis.name: axis.maximum}).get(axis.name)
default = self.normalizeLocation({axis.name: axis.default}).get(axis.name)
# and set them in the axis.minimum
axis.minimum = minimum
axis.maximum = maximum
axis.default = default
# now the rules
for rule in self.rules:
newConditionSets = []
for conditions in rule.conditionSets:
newConditions = []
for cond in conditions:
if cond.get("minimum") is not None:
minimum = self.normalizeLocation(
{cond["name"]: cond["minimum"]}
).get(cond["name"])
else:
minimum = None
if cond.get("maximum") is not None:
maximum = self.normalizeLocation(
{cond["name"]: cond["maximum"]}
).get(cond["name"])
else:
maximum = None
newConditions.append(
dict(name=cond["name"], minimum=minimum, maximum=maximum)
)
newConditionSets.append(newConditions)
rule.conditionSets = newConditionSets
def loadSourceFonts(self, opener, **kwargs):
"""Ensure SourceDescriptor.font attributes are loaded, and return list of fonts.
Takes a callable which initializes a new font object (e.g. TTFont, or
defcon.Font, etc.) from the SourceDescriptor.path, and sets the
SourceDescriptor.font attribute.
If the font attribute is already not None, it is not loaded again.
Fonts with the same path are only loaded once and shared among SourceDescriptors.
For example, to load UFO sources using defcon:
designspace = DesignSpaceDocument.fromfile("path/to/my.designspace")
designspace.loadSourceFonts(defcon.Font)
Or to load masters as FontTools binary fonts, including extra options:
designspace.loadSourceFonts(ttLib.TTFont, recalcBBoxes=False)
Args:
opener (Callable): takes one required positional argument, the source.path,
and an optional list of keyword arguments, and returns a new font object
loaded from the path.
**kwargs: extra options passed on to the opener function.
Returns:
List of font objects in the order they appear in the sources list.
"""
# we load fonts with the same source.path only once
loaded = {}
fonts = []
for source in self.sources:
if source.font is not None: # font already loaded
fonts.append(source.font)
continue
if source.path in loaded:
source.font = loaded[source.path]
else:
if source.path is None:
raise DesignSpaceDocumentError(
"Designspace source '%s' has no 'path' attribute"
% (source.name or "<Unknown>")
)
source.font = opener(source.path, **kwargs)
loaded[source.path] = source.font
fonts.append(source.font)
return fonts
@property
def formatTuple(self):
"""Return the formatVersion as a tuple of (major, minor).
.. versionadded:: 5.0
"""
if self.formatVersion is None:
return (5, 0)
numbers = (int(i) for i in self.formatVersion.split("."))
major = next(numbers)
minor = next(numbers, 0)
return (major, minor)
def getVariableFonts(self) -> List[VariableFontDescriptor]:
"""Return all variable fonts defined in this document, or implicit
variable fonts that can be built from the document's continuous axes.
In the case of Designspace documents before version 5, the whole
document was implicitly describing a variable font that covers the
whole space.
In version 5 and above documents, there can be as many variable fonts
as there are locations on discrete axes.
.. seealso:: :func:`splitInterpolable`
.. versionadded:: 5.0
"""
if self.variableFonts:
return self.variableFonts
variableFonts = []
discreteAxes = []
rangeAxisSubsets: List[
Union[RangeAxisSubsetDescriptor, ValueAxisSubsetDescriptor]
] = []
for axis in self.axes:
if hasattr(axis, "values"):
# Mypy doesn't support narrowing union types via hasattr()
# TODO(Python 3.10): use TypeGuard
# https://mypy.readthedocs.io/en/stable/type_narrowing.html
axis = cast(DiscreteAxisDescriptor, axis)
discreteAxes.append(axis) # type: ignore
else:
rangeAxisSubsets.append(RangeAxisSubsetDescriptor(name=axis.name))
valueCombinations = itertools.product(*[axis.values for axis in discreteAxes])
for values in valueCombinations:
basename = None
if self.filename is not None:
basename = os.path.splitext(self.filename)[0] + "-VF"
if self.path is not None:
basename = os.path.splitext(os.path.basename(self.path))[0] + "-VF"
if basename is None:
basename = "VF"
axisNames = "".join(
[f"-{axis.tag}{value}" for axis, value in zip(discreteAxes, values)]
)
variableFonts.append(
VariableFontDescriptor(
name=f"{basename}{axisNames}",
axisSubsets=rangeAxisSubsets
+ [
ValueAxisSubsetDescriptor(name=axis.name, userValue=value)
for axis, value in zip(discreteAxes, values)
],
)
)
return variableFonts
def deepcopyExceptFonts(self):
"""Allow deep-copying a DesignSpace document without deep-copying
attached UFO fonts or TTFont objects. The :attr:`font` attribute
is shared by reference between the original and the copy.
.. versionadded:: 5.0
"""
fonts = [source.font for source in self.sources]
try:
for source in self.sources:
source.font = None
res = copy.deepcopy(self)
for source, font in zip(res.sources, fonts):
source.font = font
return res
finally:
for source, font in zip(self.sources, fonts):
source.font = font
def main(args=None):
"""Roundtrip .designspace file through the DesignSpaceDocument class"""
if args is None:
import sys
args = sys.argv[1:]
from argparse import ArgumentParser
parser = ArgumentParser(prog="designspaceLib", description=main.__doc__)
parser.add_argument("input")
parser.add_argument("output")
options = parser.parse_args(args)
ds = DesignSpaceDocument.fromfile(options.input)
ds.write(options.output)