"""

A module for finding, managing, and using fonts across platforms.

This module provides a single `FontManager` instance, ``fontManager``, that can

be shared across backends and platforms. The `findfont`

function returns the best TrueType (TTF) font file in the local or

system font path that matches the specified `FontProperties`

instance. The `FontManager` also handles Adobe Font Metrics

(AFM) font files for use by the PostScript backend.

The `FontManager.addfont` function adds a custom font from a file without

installing it into your operating system.

The design is based on the `W3C Cascading Style Sheet, Level 1 (CSS1)

font specification <http://www.w3.org/TR/1998/REC-CSS2-19980512/>`_.

Future versions may implement the Level 2 or 2.1 specifications.

"""

# KNOWN ISSUES

#

# - documentation

# - font variant is untested

# - font stretch is incomplete

# - font size is incomplete

# - default font algorithm needs improvement and testing

# - setWeights function needs improvement

# - 'light' is an invalid weight value, remove it.

from __future__ import annotations

from base64 import b64encode

import copy

import dataclasses

from functools import cache, lru_cache

import functools

from io import BytesIO

import json

import logging

from numbers import Integral

import os

from pathlib import Path

import plistlib

import re

import subprocess

import sys

import threading

import matplotlib as mpl

from matplotlib import _api, _afm, cbook, ft2font

from matplotlib._fontconfig_pattern import (

parse_fontconfig_pattern, generate_fontconfig_pattern)

from matplotlib.rcsetup import _validators

_log = logging.getLogger(__name__)

font_scalings = {

'xx-small': 0.579,

'x-small': 0.694,

'small': 0.833,

'medium': 1.0,

'large': 1.200,

'x-large': 1.440,

'xx-large': 1.728,

'larger': 1.2,

'smaller': 0.833,

None: 1.0,

}

stretch_dict = {

'ultra-condensed': 100,

'extra-condensed': 200,

'condensed': 300,

'semi-condensed': 400,

'normal': 500,

'semi-expanded': 600,

'semi-extended': 600,

'expanded': 700,

'extended': 700,

'extra-expanded': 800,

'extra-extended': 800,

'ultra-expanded': 900,

'ultra-extended': 900,

}

weight_dict = {

'ultralight': 100,

'light': 200,

'normal': 400,

'regular': 400,

'book': 400,

'medium': 500,

'roman': 500,

'semibold': 600,

'demibold': 600,

'demi': 600,

'bold': 700,

'heavy': 800,

'extra bold': 800,

'black': 900,

}

_weight_regexes = [

# From fontconfig's FcFreeTypeQueryFaceInternal; not the same as

# weight_dict!

("thin", 100),

("extralight", 200),

("ultralight", 200),

("demilight", 350),

("semilight", 350),

("light", 300), # Needs to come *after* demi/semilight!

("book", 380),

("regular", 400),

("normal", 400),

("medium", 500),

("demibold", 600),

("demi", 600),

("semibold", 600),

("extrabold", 800),

("superbold", 800),

("ultrabold", 800),

("bold", 700), # Needs to come *after* extra/super/ultrabold!

("ultrablack", 1000),

("superblack", 1000),

("extrablack", 1000),

(r"\bultra", 1000),

("black", 900), # Needs to come *after* ultra/super/extrablack!

("heavy", 900),

]

font_family_aliases = {

'serif',

'sans-serif',

'sans serif',

'cursive',

'fantasy',

'monospace',

'sans',

}

# OS Font paths

try:

_HOME = Path.home()

except Exception: # Exceptions thrown by home() are not specified...

_HOME = Path(os.devnull) # Just an arbitrary path with no children.

MSFolders = \

r'Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders'

MSFontDirectories = [

r'SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts',

r'SOFTWARE\Microsoft\Windows\CurrentVersion\Fonts']

MSUserFontDirectories = [

str(_HOME / 'AppData/Local/Microsoft/Windows/Fonts'),

str(_HOME / 'AppData/Roaming/Microsoft/Windows/Fonts'),

]

X11FontDirectories = [

# an old standard installation point

"/usr/X11R6/lib/X11/fonts/TTF/",

"/usr/X11/lib/X11/fonts",

# here is the new standard location for fonts

"/usr/share/fonts/",

# documented as a good place to install new fonts

"/usr/local/share/fonts/",

# common application, not really useful

"/usr/lib/openoffice/share/fonts/truetype/",

# user fonts

str((Path(os.environ.get('XDG_DATA_HOME') or _HOME / ".local/share"))

/ "fonts"),

str(_HOME / ".fonts"),

]

OSXFontDirectories = [

"/Library/Fonts/",

"/Network/Library/Fonts/",

"/System/Library/Fonts/",

# fonts installed via MacPorts

"/opt/local/share/fonts",

# user fonts

str(_HOME / "Library/Fonts"),

]

def _normalize_weight(weight):

return weight if isinstance(weight, Integral) else weight_dict[weight]

def get_fontext_synonyms(fontext):

"""

Return a list of file extensions that are synonyms for

the given file extension *fileext*.

"""

return {

'afm': ['afm'],

'otf': ['otf', 'ttc', 'ttf'],

'ttc': ['otf', 'ttc', 'ttf'],

'ttf': ['otf', 'ttc', 'ttf'],

}[fontext]

def list_fonts(directory, extensions):

"""

Return a list of all fonts matching any of the extensions, found

recursively under the directory.

"""

extensions = ["." + ext for ext in extensions]

return [os.path.join(dirpath, filename)

# os.walk ignores access errors, unlike Path.glob.

for dirpath, _, filenames in os.walk(directory)

for filename in filenames

if Path(filename).suffix.lower() in extensions]

def win32FontDirectory():

r"""

Return the user-specified font directory for Win32. This is

looked up from the registry key ::

\\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders\Fonts

If the key is not found, ``%WINDIR%\Fonts`` will be returned.

""" # noqa: E501

import winreg

try:

with winreg.OpenKey(winreg.HKEY_CURRENT_USER, MSFolders) as user:

return winreg.QueryValueEx(user, 'Fonts')[0]

except OSError:

return os.path.join(os.environ['WINDIR'], 'Fonts')

def _get_win32_installed_fonts():

"""List the font paths known to the Windows registry."""

import winreg

items = set()

# Search and resolve fonts listed in the registry.

for domain, base_dirs in [

(winreg.HKEY_LOCAL_MACHINE, [win32FontDirectory()]), # System.

(winreg.HKEY_CURRENT_USER, MSUserFontDirectories), # User.

]:

for base_dir in base_dirs:

for reg_path in MSFontDirectories:

try:

with winreg.OpenKey(domain, reg_path) as local:

for j in range(winreg.QueryInfoKey(local)[1]):

# value may contain the filename of the font or its

# absolute path.

key, value, tp = winreg.EnumValue(local, j)

if not isinstance(value, str):

continue

try:

# If value contains already an absolute path,

# then it is not changed further.

path = Path(base_dir, value).resolve()

except RuntimeError:

# Don't fail with invalid entries.

continue

items.add(path)

except (OSError, MemoryError):

continue

return items

@cache

def _get_fontconfig_fonts():

"""Cache and list the font paths known to ``fc-list``."""

try:

if b'--format' not in subprocess.check_output(['fc-list', '--help']):

_log.warning( # fontconfig 2.7 implemented --format.

'Matplotlib needs fontconfig>=2.7 to query system fonts.')

return []

out = subprocess.check_output(['fc-list', '--format=%{file}\\n'])

except (OSError, subprocess.CalledProcessError):

return []

return [Path(os.fsdecode(fname)) for fname in out.split(b'\n')]

@cache

def _get_macos_fonts():

"""Cache and list the font paths known to ``system_profiler SPFontsDataType``."""

try:

d, = plistlib.loads(

subprocess.check_output(["system_profiler", "-xml", "SPFontsDataType"]))

except (OSError, subprocess.CalledProcessError, plistlib.InvalidFileException):

return []

return [Path(entry["path"]) for entry in d["_items"]]

def findSystemFonts(fontpaths=None, fontext='ttf'):

"""

Search for fonts in the specified font paths. If no paths are

given, will use a standard set of system paths, as well as the

list of fonts tracked by fontconfig if fontconfig is installed and

available. A list of TrueType fonts are returned by default with

AFM fonts as an option.

"""

fontfiles = set()

fontexts = get_fontext_synonyms(fontext)

if fontpaths is None:

if sys.platform == 'win32':

installed_fonts = _get_win32_installed_fonts()

fontpaths = []

elif sys.platform == 'emscripten':

installed_fonts = []

fontpaths = []

else:

installed_fonts = _get_fontconfig_fonts()

if sys.platform == 'darwin':

installed_fonts += _get_macos_fonts()

fontpaths = [*X11FontDirectories, *OSXFontDirectories]

else:

fontpaths = X11FontDirectories

fontfiles.update(str(path) for path in installed_fonts

if path.suffix.lower()[1:] in fontexts)

elif isinstance(fontpaths, str):

fontpaths = [fontpaths]

for path in fontpaths:

fontfiles.update(map(os.path.abspath, list_fonts(path, fontexts)))

return [fname for fname in fontfiles if os.path.exists(fname)]

@dataclasses.dataclass(frozen=True)

class FontEntry:

"""

A class for storing Font properties.

It is used when populating the font lookup dictionary.

"""

fname: str = ''

name: str = ''

style: str = 'normal'

variant: str = 'normal'

weight: str | int = 'normal'

stretch: str = 'normal'

size: str = 'medium'

def _repr_html_(self) -> str:

png_stream = self._repr_png_()

png_b64 = b64encode(png_stream).decode()

return f"<img src=\"data:image/png;base64, {png_b64}\" />"

def _repr_png_(self) -> bytes:

from matplotlib.figure import Figure # Circular import.

fig = Figure()

font_path = Path(self.fname) if self.fname != '' else None

fig.text(0, 0, self.name, font=font_path)

with BytesIO() as buf:

fig.savefig(buf, bbox_inches='tight', transparent=True)

return buf.getvalue()

def ttfFontProperty(font):

"""

Extract information from a TrueType font file.

Parameters

----------

font : `.FT2Font`

The TrueType font file from which information will be extracted.

Returns

-------

`FontEntry`

The extracted font properties.

"""

name = font.family_name

# Styles are: italic, oblique, and normal (default)

sfnt = font.get_sfnt()

mac_key = (1, # platform: macintosh

0, # id: roman

0) # langid: english

ms_key = (3, # platform: microsoft

1, # id: unicode_cs

0x0409) # langid: english_united_states

# These tables are actually mac_roman-encoded, but mac_roman support may be

# missing in some alternative Python implementations and we are only going

# to look for ASCII substrings, where any ASCII-compatible encoding works

# - or big-endian UTF-16, since important Microsoft fonts use that.

sfnt2 = (sfnt.get((*mac_key, 2), b'').decode('latin-1').lower() or

sfnt.get((*ms_key, 2), b'').decode('utf_16_be').lower())

sfnt4 = (sfnt.get((*mac_key, 4), b'').decode('latin-1').lower() or

sfnt.get((*ms_key, 4), b'').decode('utf_16_be').lower())

if sfnt4.find('oblique') >= 0:

style = 'oblique'

elif sfnt4.find('italic') >= 0:

style = 'italic'

elif sfnt2.find('regular') >= 0:

style = 'normal'

elif ft2font.StyleFlags.ITALIC in font.style_flags:

style = 'italic'

else:

style = 'normal'

# Variants are: small-caps and normal (default)

# !!!! Untested

if name.lower() in ['capitals', 'small-caps']:

variant = 'small-caps'

else:

variant = 'normal'

# The weight-guessing algorithm is directly translated from fontconfig

# 2.13.1's FcFreeTypeQueryFaceInternal (fcfreetype.c).

wws_subfamily = 22

typographic_subfamily = 16

font_subfamily = 2

styles = [

sfnt.get((*mac_key, wws_subfamily), b'').decode('latin-1'),

sfnt.get((*mac_key, typographic_subfamily), b'').decode('latin-1'),

sfnt.get((*mac_key, font_subfamily), b'').decode('latin-1'),

sfnt.get((*ms_key, wws_subfamily), b'').decode('utf-16-be'),

sfnt.get((*ms_key, typographic_subfamily), b'').decode('utf-16-be'),

sfnt.get((*ms_key, font_subfamily), b'').decode('utf-16-be'),

]

styles = [*filter(None, styles)] or [font.style_name]

def get_weight(): # From fontconfig's FcFreeTypeQueryFaceInternal.

# OS/2 table weight.

os2 = font.get_sfnt_table("OS/2")

if os2 and os2["version"] != 0xffff:

return os2["usWeightClass"]

# PostScript font info weight.

try:

ps_font_info_weight = (

font.get_ps_font_info()["weight"].replace(" ", "") or "")

except ValueError:

pass

else:

for regex, weight in _weight_regexes:

if re.fullmatch(regex, ps_font_info_weight, re.I):

return weight

# Style name weight.

for style in styles:

style = style.replace(" ", "")

for regex, weight in _weight_regexes:

if re.search(regex, style, re.I):

return weight

if ft2font.StyleFlags.BOLD in font.style_flags:

return 700 # "bold"

return 500 # "medium", not "regular"!

weight = int(get_weight())

# Stretch can be absolute and relative

# Absolute stretches are: ultra-condensed, extra-condensed, condensed,

# semi-condensed, normal, semi-expanded, expanded, extra-expanded,

# and ultra-expanded.

# Relative stretches are: wider, narrower

# Child value is: inherit

if any(word in sfnt4 for word in ['narrow', 'condensed', 'cond']):

stretch = 'condensed'

elif 'demi cond' in sfnt4:

stretch = 'semi-condensed'

elif any(word in sfnt4 for word in ['wide', 'expanded', 'extended']):

stretch = 'expanded'

else:

stretch = 'normal'

# Sizes can be absolute and relative.

# Absolute sizes are: xx-small, x-small, small, medium, large, x-large,

# and xx-large.

# Relative sizes are: larger, smaller

# Length value is an absolute font size, e.g., 12pt

# Percentage values are in 'em's. Most robust specification.

if not font.scalable:

raise NotImplementedError("Non-scalable fonts are not supported")

size = 'scalable'

return FontEntry(font.fname, name, style, variant, weight, stretch, size)

def afmFontProperty(fontpath, font):

"""

Extract information from an AFM font file.

Parameters

----------

fontpath : str

The filename corresponding to *font*.

font : AFM

The AFM font file from which information will be extracted.

Returns

-------

`FontEntry`

The extracted font properties.

"""

name = font.get_familyname()

fontname = font.get_fontname().lower()

# Styles are: italic, oblique, and normal (default)

if font.get_angle() != 0 or 'italic' in name.lower():

style = 'italic'

elif 'oblique' in name.lower():

style = 'oblique'

else:

style = 'normal'

# Variants are: small-caps and normal (default)

# !!!! Untested

if name.lower() in ['capitals', 'small-caps']:

variant = 'small-caps'

else:

variant = 'normal'

weight = font.get_weight().lower()

if weight not in weight_dict:

weight = 'normal'

# Stretch can be absolute and relative

# Absolute stretches are: ultra-condensed, extra-condensed, condensed,

# semi-condensed, normal, semi-expanded, expanded, extra-expanded,

# and ultra-expanded.

# Relative stretches are: wider, narrower

# Child value is: inherit

if 'demi cond' in fontname:

stretch = 'semi-condensed'

elif any(word in fontname for word in ['narrow', 'cond']):

stretch = 'condensed'

elif any(word in fontname for word in ['wide', 'expanded', 'extended']):

stretch = 'expanded'

else:

stretch = 'normal'

# Sizes can be absolute and relative.

# Absolute sizes are: xx-small, x-small, small, medium, large, x-large,

# and xx-large.

# Relative sizes are: larger, smaller

# Length value is an absolute font size, e.g., 12pt

# Percentage values are in 'em's. Most robust specification.

# All AFM fonts are apparently scalable.

size = 'scalable'

return FontEntry(fontpath, name, style, variant, weight, stretch, size)

def _cleanup_fontproperties_init(init_method):

"""

A decorator to limit the call signature to single a positional argument

or alternatively only keyword arguments.

We still accept but deprecate all other call signatures.

When the deprecation expires we can switch the signature to::

__init__(self, pattern=None, /, *, family=None, style=None, ...)

plus a runtime check that pattern is not used alongside with the

keyword arguments. This results eventually in the two possible

call signatures::

FontProperties(pattern)

FontProperties(family=..., size=..., ...)

"""

@functools.wraps(init_method)

def wrapper(self, *args, **kwargs):

# multiple args with at least some positional ones

if len(args) > 1 or len(args) == 1 and kwargs:

# Note: Both cases were previously handled as individual properties.

# Therefore, we do not mention the case of font properties here.

_api.warn_deprecated(

"3.10",

message="Passing individual properties to FontProperties() "

"positionally was deprecated in Matplotlib %(since)s and "

"will be removed in %(removal)s. Please pass all properties "

"via keyword arguments."

)

# single non-string arg -> clearly a family not a pattern

if len(args) == 1 and not kwargs and not cbook.is_scalar_or_string(args[0]):

# Case font-family list passed as single argument

_api.warn_deprecated(

"3.10",

message="Passing family as positional argument to FontProperties() "

"was deprecated in Matplotlib %(since)s and will be removed "

"in %(removal)s. Please pass family names as keyword"

"argument."

)

# Note on single string arg:

# This has been interpreted as pattern so far. We are already raising if a

# non-pattern compatible family string was given. Therefore, we do not need

# to warn for this case.

return init_method(self, *args, **kwargs)

return wrapper

class FontProperties:

"""

A class for storing and manipulating font properties.

The font properties are the six properties described in the

`W3C Cascading Style Sheet, Level 1

<http://www.w3.org/TR/1998/REC-CSS2-19980512/>`_ font

specification and *math_fontfamily* for math fonts:

- family: A list of font names in decreasing order of priority.

The items may include a generic font family name, either 'sans-serif',

'serif', 'cursive', 'fantasy', or 'monospace'. In that case, the actual

font to be used will be looked up from the associated rcParam during the

search process in `.findfont`. Default: :rc:`font.family`

- style: Either 'normal', 'italic' or 'oblique'.

Default: :rc:`font.style`

- variant: Either 'normal' or 'small-caps'.

Default: :rc:`font.variant`

- stretch: A numeric value in the range 0-1000 or one of

'ultra-condensed', 'extra-condensed', 'condensed',

'semi-condensed', 'normal', 'semi-expanded', 'expanded',

'extra-expanded' or 'ultra-expanded'. Default: :rc:`font.stretch`

- weight: A numeric value in the range 0-1000 or one of

'ultralight', 'light', 'normal', 'regular', 'book', 'medium',

'roman', 'semibold', 'demibold', 'demi', 'bold', 'heavy',

'extra bold', 'black'. Default: :rc:`font.weight`

- size: Either a relative value of 'xx-small', 'x-small',

'small', 'medium', 'large', 'x-large', 'xx-large' or an

absolute font size, e.g., 10. Default: :rc:`font.size`

- math_fontfamily: The family of fonts used to render math text.

Supported values are: 'dejavusans', 'dejavuserif', 'cm',

'stix', 'stixsans' and 'custom'. Default: :rc:`mathtext.fontset`

Alternatively, a font may be specified using the absolute path to a font

file, by using the *fname* kwarg. However, in this case, it is typically

simpler to just pass the path (as a `pathlib.Path`, not a `str`) to the

*font* kwarg of the `.Text` object.

The preferred usage of font sizes is to use the relative values,

e.g., 'large', instead of absolute font sizes, e.g., 12. This

approach allows all text sizes to be made larger or smaller based

on the font manager's default font size.

This class accepts a single positional string as fontconfig_ pattern_,

or alternatively individual properties as keyword arguments::

FontProperties(pattern)

FontProperties(*, family=None, style=None, variant=None, ...)

This support does not depend on fontconfig; we are merely borrowing its

pattern syntax for use here.

.. _fontconfig: https://www.freedesktop.org/wiki/Software/fontconfig/

.. _pattern:

https://www.freedesktop.org/software/fontconfig/fontconfig-user.html

Note that Matplotlib's internal font manager and fontconfig use a

different algorithm to lookup fonts, so the results of the same pattern

may be different in Matplotlib than in other applications that use

fontconfig.

"""

@_cleanup_fontproperties_init

def __init__(self, family=None, style=None, variant=None, weight=None,

stretch=None, size=None,

fname=None, # if set, it's a hardcoded filename to use

math_fontfamily=None):

self.set_family(family)

self.set_style(style)

self.set_variant(variant)

self.set_weight(weight)

self.set_stretch(stretch)

self.set_file(fname)

self.set_size(size)

self.set_math_fontfamily(math_fontfamily)

# Treat family as a fontconfig pattern if it is the only parameter

# provided. Even in that case, call the other setters first to set

# attributes not specified by the pattern to the rcParams defaults.

if (isinstance(family, str)

and style is None and variant is None and weight is None

and stretch is None and size is None and fname is None):

self.set_fontconfig_pattern(family)

@classmethod

def _from_any(cls, arg):

"""

Generic constructor which can build a `.FontProperties` from any of the

following:

- a `.FontProperties`: it is passed through as is;

- `None`: a `.FontProperties` using rc values is used;

- an `os.PathLike`: it is used as path to the font file;

- a `str`: it is parsed as a fontconfig pattern;

- a `dict`: it is passed as ``**kwargs`` to `.FontProperties`.

"""

if arg is None:

return cls()

elif isinstance(arg, cls):

return arg

elif isinstance(arg, os.PathLike):

return cls(fname=arg)

elif isinstance(arg, str):

return cls(arg)

else:

return cls(**arg)

def __hash__(self):

l = (tuple(self.get_family()),

self.get_slant(),

self.get_variant(),

self.get_weight(),

self.get_stretch(),

self.get_size(),

self.get_file(),

self.get_math_fontfamily())

return hash(l)

def __eq__(self, other):

return hash(self) == hash(other)

def __str__(self):

return self.get_fontconfig_pattern()

def get_family(self):

"""

Return a list of individual font family names or generic family names.

The font families or generic font families (which will be resolved

from their respective rcParams when searching for a matching font) in

the order of preference.

"""

return self._family

def get_name(self):

"""

Return the name of the font that best matches the font properties.

"""

return get_font(findfont(self)).family_name

def get_style(self):

"""

Return the font style. Values are: 'normal', 'italic' or 'oblique'.

"""

return self._slant

def get_variant(self):

"""

Return the font variant. Values are: 'normal' or 'small-caps'.

"""

return self._variant

def get_weight(self):

"""

Get the font weight. Options are: A numeric value in the

range 0-1000 or one of 'light', 'normal', 'regular', 'book',

'medium', 'roman', 'semibold', 'demibold', 'demi', 'bold',

'heavy', 'extra bold', 'black'

"""

return self._weight

def get_stretch(self):

"""

Return the font stretch or width. Options are: 'ultra-condensed',

'extra-condensed', 'condensed', 'semi-condensed', 'normal',

'semi-expanded', 'expanded', 'extra-expanded', 'ultra-expanded'.

"""

return self._stretch

def get_size(self):

"""

Return the font size.

"""

return self._size

def get_file(self):

"""

Return the filename of the associated font.

"""

return self._file

def get_fontconfig_pattern(self):

"""

Get a fontconfig_ pattern_ suitable for looking up the font as

specified with fontconfig's ``fc-match`` utility.

This support does not depend on fontconfig; we are merely borrowing its

pattern syntax for use here.

"""

return generate_fontconfig_pattern(self)

def set_family(self, family):

"""

Change the font family. Can be either an alias (generic name

is CSS parlance), such as: 'serif', 'sans-serif', 'cursive',

'fantasy', or 'monospace', a real font name or a list of real

font names. Real font names are not supported when

:rc:`text.usetex` is `True`. Default: :rc:`font.family`

"""

family = mpl._val_or_rc(family, 'font.family')

if isinstance(family, str):

family = [family]

self._family = family

def set_style(self, style):

"""

Set the font style.

Parameters

----------

style : {'normal', 'italic', 'oblique'}, default: :rc:`font.style`

"""

style = mpl._val_or_rc(style, 'font.style')

_api.check_in_list(['normal', 'italic', 'oblique'], style=style)

self._slant = style

def set_variant(self, variant):

"""

Set the font variant.

Parameters

----------

variant : {'normal', 'small-caps'}, default: :rc:`font.variant`

"""

variant = mpl._val_or_rc(variant, 'font.variant')

_api.check_in_list(['normal', 'small-caps'], variant=variant)

self._variant = variant

def set_weight(self, weight):

"""

Set the font weight.

Parameters

----------

weight : int or {'ultralight', 'light', 'normal', 'regular', 'book', \

'medium', 'roman', 'semibold', 'demibold', 'demi', 'bold', 'heavy', \

'extra bold', 'black'}, default: :rc:`font.weight`

If int, must be in the range 0-1000.

"""

weight = mpl._val_or_rc(weight, 'font.weight')

if weight in weight_dict:

self._weight = weight

return

try:

weight = int(weight)

except ValueError:

pass

else:

if 0 <= weight <= 1000:

self._weight = weight

return

raise ValueError(f"{weight=} is invalid")

def set_stretch(self, stretch):

"""

Set the font stretch or width.

Parameters

----------

stretch : int or {'ultra-condensed', 'extra-condensed', 'condensed', \

'semi-condensed', 'normal', 'semi-expanded', 'expanded', 'extra-expanded', \

'ultra-expanded'}, default: :rc:`font.stretch`

If int, must be in the range 0-1000.

"""

stretch = mpl._val_or_rc(stretch, 'font.stretch')

if stretch in stretch_dict:

self._stretch = stretch

return

try:

stretch = int(stretch)

except ValueError:

pass

else:

if 0 <= stretch <= 1000:

self._stretch = stretch

return

raise ValueError(f"{stretch=} is invalid")

def set_size(self, size):

"""

Set the font size.

Parameters

----------

size : float or {'xx-small', 'x-small', 'small', 'medium', \

'large', 'x-large', 'xx-large'}, default: :rc:`font.size`

If a float, the font size in points. The string values denote

sizes relative to the default font size.

"""

size = mpl._val_or_rc(size, 'font.size')

try:

size = float(size)

except ValueError:

try:

scale = font_scalings[size]

except KeyError as err:

raise ValueError(

"Size is invalid. Valid font size are "

+ ", ".join(map(str, font_scalings))) from err

else:

size = scale * FontManager.get_default_size()

if size < 1.0:

_log.info('Fontsize %1.2f < 1.0 pt not allowed by FreeType. '

'Setting fontsize = 1 pt', size)

size = 1.0

self._size = size

def set_file(self, file):

"""

Set the filename of the fontfile to use. In this case, all

other properties will be ignored.

"""

self._file = os.fspath(file) if file is not None else None

def set_fontconfig_pattern(self, pattern):

"""

Set the properties by parsing a fontconfig_ *pattern*.

This support does not depend on fontconfig; we are merely borrowing its

pattern syntax for use here.

"""

for key, val in parse_fontconfig_pattern(pattern).items():

if type(val) is list:

getattr(self, "set_" + key)(val[0])

else:

getattr(self, "set_" + key)(val)

def get_math_fontfamily(self):

"""

Return the name of the font family used for math text.

The default font is :rc:`mathtext.fontset`.

"""

return self._math_fontfamily

def set_math_fontfamily(self, fontfamily):

"""

Set the font family for text in math mode.

If not set explicitly, :rc:`mathtext.fontset` will be used.

Parameters

----------

fontfamily : str

The name of the font family.

Available font families are defined in the

:ref:`default matplotlibrc file <customizing-with-matplotlibrc-files>`.

See Also

--------

.text.Text.get_math_fontfamily

"""

if fontfamily is None:

fontfamily = mpl.rcParams['mathtext.fontset']

else:

valid_fonts = _validators['mathtext.fontset'].valid.values()

# _check_in_list() Validates the parameter math_fontfamily as

# if it were passed to rcParams['mathtext.fontset']

_api.check_in_list(valid_fonts, math_fontfamily=fontfamily)

self._math_fontfamily = fontfamily

def copy(self):

"""Return a copy of self."""

return copy.copy(self)

# Aliases

set_name = set_family

get_slant = get_style

set_slant = set_style

get_size_in_points = get_size

class _JSONEncoder(json.JSONEncoder):

def default(self, o):

if isinstance(o, FontManager):

return dict(o.__dict__, __class__='FontManager')

elif isinstance(o, FontEntry):

d = dict(o.__dict__, __class__='FontEntry')

try:

# Cache paths of fonts shipped with Matplotlib relative to the

# Matplotlib data path, which helps in the presence of venvs.

d["fname"] = str(Path(d["fname"]).relative_to(mpl.get_data_path()))

except ValueError:

pass

return d

else:

return super().default(o)

def _json_decode(o):

cls = o.pop('__class__', None)

if cls is None:

return o

elif cls == 'FontManager':

r = FontManager.__new__(FontManager)

r.__dict__.update(o)

return r

elif cls == 'FontEntry':

if not os.path.isabs(o['fname']):

o['fname'] = os.path.join(mpl.get_data_path(), o['fname'])