mirror of
https://github.com/ryanoasis/nerd-fonts.git
synced 2024-12-19 20:12:52 +02:00
b0e5a35477
[why]
Patching CartographCF-Bold.ttf creates this naming:
Family (ID 1) : CartographF Nerd Font Condensed
SubFamily (ID 2) : Bold
Fullname (ID 4) : CartographF Nerd Font Condensed Bold
PSN (ID 6) : CartographFNF-CondensedBold
PrefFamily (ID 16) : CartographF Nerd Font
PrefStyles (ID 17) : Condensed Bold
CartographF Nerd Font Condensed Bold
\===> 'CartographFNerdFont-CondensedBold.ttf'
[how]
The font-patcher historically used the file name of the to-be-patched
font to come up with the new name. When the FontnameParser has been
developed that mechanics has been copied at least for fallback. The
earliest tests compared old and new naming with all the filenames.
Later, when the FontnameParser has been used to really apply name
changes it has always based the parsing on the Fullname or the PSname,
because they really hold the information (or at least should hold);
while the filename might be completely random.
Still code the dealt with specific problems in FILEnames prevailed. The
Ubuntu font for example has a file name like 'Ubuntu-C.ttf', and we
needed to convert the C to Condensed.
As that requirement vanished we can drop all the code that has been
added specifically only for parsing the Ubuntu font filenames.
Side note: USUALLY font filenames should be roughly equal to the PSname.
Fixes: #1258
Signed-off-by: Fini Jastrow <ulf.fini.jastrow@desy.de>
338 lines
16 KiB
Python
338 lines
16 KiB
Python
#!/usr/bin/env python
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# coding=utf8
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import re
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from FontnameTools import FontnameTools
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class FontnameParser:
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"""Parse a font name and generate all kinds of names"""
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def __init__(self, fontname, logger):
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"""Parse a fontname and store the results"""
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self.parse_ok = False
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self.use_short_families = (False, False, False) # ( camelcase name, short styles, aggressive )
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self.keep_regular_in_family = None # None = auto, True, False
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self.suppress_preferred_if_identical = True
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self.family_suff = ''
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self.ps_fontname_suff = ''
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self.short_family_suff = ''
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self.name_subst = []
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[ self.parse_ok, self._basename, self.weight_token, self.style_token, self.other_token, self._rest ] = FontnameTools.parse_font_name(fontname)
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self.basename = self._basename
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self.rest = self._rest
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self.add_name_substitution_table(FontnameTools.SIL_TABLE)
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self.rename_oblique = True
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self.logger = logger
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def _make_ps_name(self, n, is_family):
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"""Helper to limit font name length in PS names"""
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fam = 'family ' if is_family else ''
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limit = 31 if is_family else 63
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if len(n) <= limit:
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return n
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r = re.search('(.*)(-.*)', n)
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if not r:
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new_n = n[:limit]
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else:
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q = limit - len(r.groups()[1])
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if q < 1:
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q = 1
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self.logger.error('====-< Shortening too long PS {}name: Garbage warning'. format(fam))
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new_n = r.groups()[0][:q] + r.groups()[1]
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if new_n != n:
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self.logger.error('====-< Shortening too long PS {}name: {} -> {}'.format(fam, n, new_n))
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return new_n
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def _shortened_name(self):
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"""Return a blank free basename-rest combination"""
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if not self.use_short_families[0]:
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return (self.basename, self.rest)
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else:
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return (FontnameTools.concat(self.basename, self.rest).replace(' ', ''), '')
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def set_keep_regular_in_family(self, keep):
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"""Familyname may contain 'Regular' where it should normally be suppressed"""
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self.keep_regular_in_family = keep
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def set_expect_no_italic(self, noitalic):
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"""Prevents rewriting Oblique as family name part"""
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# To prevent naming clashes usually Oblique is moved out in the family name
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# because some fonts have Italic and Oblique, and we want to generate pure
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# RIBBI families in ID1/2.
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# But some fonts have Oblique instead of Italic, here the prevential movement
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# is not needed, or rather contraproductive. This can not be detected on a
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# font file level but needs to be specified per family from the outside.
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# Returns true if setting was successful.
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if 'Italic' in self.style_token:
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self.rename_oblique = True
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return not noitalic
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self.rename_oblique = not noitalic
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return True
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def set_suppress_preferred(self, suppress):
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"""Suppress ID16/17 if it is identical to ID1/2 (True is default)"""
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self.suppress_preferred_if_identical = suppress
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def inject_suffix(self, family, ps_fontname, short_family):
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"""Add a custom additonal string that shows up in the resulting names"""
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self.family_suff = family.strip()
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self.ps_fontname_suff = ps_fontname.replace(' ', '')
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self.short_family_suff = short_family.strip()
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return self
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def enable_short_families(self, camelcase_name, prefix, aggressive):
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"""Enable short styles in Family when (original) font name starts with prefix; enable CamelCase basename in (Typog.) Family"""
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# camelcase_name is boolean
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# prefix is either a string or False/True
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if isinstance(prefix, str):
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prefix = self._basename.startswith(prefix)
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self.use_short_families = ( camelcase_name, prefix, aggressive )
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return self
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def add_name_substitution_table(self, table):
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"""Have some fonts renamed, takes list of tuples (regex, replacement)"""
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# The regex will be anchored to name begin and used case insensitive
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# Replacement can have regex matches, mind to catch the correct source case
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self.name_subst = table
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self.basename = self._basename
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self.rest = self._rest
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for regex, replacement in self.name_subst:
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base_and_rest = self.basename + (' ' + self.rest if len(self.rest) else '')
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m = re.match(regex, base_and_rest, re.IGNORECASE)
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if not m:
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continue
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i = len(self.basename) - len(m.group(0))
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if i < 0:
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self.basename = m.expand(replacement).rstrip()
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self.rest = self.rest[-(i+1):].lstrip()
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else:
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self.basename = m.expand(replacement) + self.basename[len(m.group(0)):]
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return self
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def drop_for_powerline(self):
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"""Remove 'for Powerline' from all names (can not be undone)"""
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if 'Powerline' in self.other_token:
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idx = self.other_token.index('Powerline')
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self.other_token.pop(idx)
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if idx > 0 and self.other_token[idx - 1] == 'For':
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self.other_token.pop(idx - 1)
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self._basename = re.sub(r'(\b|for\s?)?powerline\b', '', self._basename, 1, re.IGNORECASE).strip()
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self.add_name_substitution_table(self.name_subst) # re-evaluate
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return self
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### Following the creation of the name parts:
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#
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# Relevant websites
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# https://www.fonttutorials.com/how-to-name-font-family/
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# https://docs.microsoft.com/en-us/typography/opentype/spec/name#name-ids
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# https://docs.microsoft.com/en-us/typography/opentype/spec/os2#fss
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# https://docs.microsoft.com/en-us/typography/opentype/spec/head#macstyle
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# Example (mind that they group 'semibold' as classic-group-of-4 Bold, while we will always only take bold as Bold):
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# Adobe Caslon Pro Regular ID1: Adobe Caslon Pro ID2: Regular
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# Adobe Caslon Pro Italic ID1: Adobe Caslon Pro ID2: Italic
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# Adobe Caslon Pro Semibold ID1: Adobe Caslon Pro ID2: Bold ID16: Adobe Caslon Pro ID17: Semibold
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# Adobe Caslon Pro Semibold Italic ID1: Adobe Caslon Pro ID2: Bold Italic ID16: Adobe Caslon Pro ID17: Semibold Italic
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# Adobe Caslon Pro Bold ID1: Adobe Caslon Pro Bold ID2: Regular ID16: Adobe Caslon Pro ID17: Bold
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# Adobe Caslon Pro Bold Italic ID1: Adobe Caslon Pro Bold ID2: Italic ID16: Adobe Caslon Pro ID17: Bold Italic
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# fontname === preferred_family + preferred_styles
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# fontname === family + subfamily
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#
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# familybase = basename + rest + other (+ suffix)
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# ID 1/2 just have self.style in the subfamily, all the rest ends up in the family
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# ID 16/17 have self.style and self.weight in the subfamily, the rest ends up in the family
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def fullname(self):
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"""Get the SFNT Fullname (ID 4)"""
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styles = self.style_token
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weights = self.weight_token
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if self.keep_regular_in_family == None:
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keep_regular = FontnameTools.is_keep_regular(self._basename + ' ' + self._rest)
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else:
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keep_regular = self.keep_regular_in_family
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if ('Regular' in styles
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and (not keep_regular
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or len(self.weight_token) > 0)): # This is actually a malformed font name
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styles = list(self.style_token)
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styles.remove('Regular')
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# For naming purposes we want Oblique to be part of the styles
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(weights, styles) = FontnameTools.make_oblique_style(weights, styles)
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(name, rest) = self._shortened_name()
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if self.use_short_families[1]:
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[ weights, styles ] = FontnameTools.short_styles([ weights, styles ], self.use_short_families[2])
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return FontnameTools.concat(name, rest, self.other_token, self.short_family_suff, weights, styles)
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def psname(self):
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"""Get the SFNT PostScriptName (ID 6)"""
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# This is almost self.family() + '-' + self.subfamily()
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(name, rest) = self._shortened_name()
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styles = self.style_token
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weights = self.weight_token
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if self.use_short_families[1]:
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styles = FontnameTools.short_styles(styles, self.use_short_families[2])
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weights = FontnameTools.short_styles(weights, self.use_short_families[2])
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fam = FontnameTools.camel_casify(FontnameTools.concat(name, rest, self.other_token, self.ps_fontname_suff))
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sub = FontnameTools.camel_casify(FontnameTools.concat(weights, styles))
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if len(sub) > 0:
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sub = '-' + sub
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fam = FontnameTools.postscript_char_filter(fam)
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sub = FontnameTools.postscript_char_filter(sub)
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return self._make_ps_name(fam + sub, False)
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def preferred_family(self):
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"""Get the SFNT Preferred Familyname (ID 16)"""
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(name, rest) = self._shortened_name()
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pfn = FontnameTools.concat(name, rest, self.other_token, self.family_suff)
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if self.suppress_preferred_if_identical and pfn == self.family():
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# Do not set if identical to ID 1
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return ''
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return pfn
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def preferred_styles(self):
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"""Get the SFNT Preferred Styles (ID 17)"""
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styles = self.style_token
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weights = self.weight_token
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# For naming purposes we want Oblique to be part of the styles
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(weights, styles) = FontnameTools.make_oblique_style(weights, styles)
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pfs = FontnameTools.concat(weights, styles)
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if self.suppress_preferred_if_identical and pfs == self.subfamily():
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# Do not set if identical to ID 2
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return ''
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return pfs
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def family(self):
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"""Get the SFNT Familyname (ID 1)"""
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# We use the short form of the styles to save on number of chars
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(name, rest) = self._shortened_name()
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other = self.other_token
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weights = self.weight_token
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aggressive = self.use_short_families[2]
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if not self.rename_oblique:
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(weights, styles) = FontnameTools.make_oblique_style(weights, [])
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if self.use_short_families[1]:
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[ other, weights ] = FontnameTools.short_styles([ other, weights ], aggressive)
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weights = [ w if w != 'Oblique' else 'Obl' for w in weights ]
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return FontnameTools.concat(name, rest, other, self.short_family_suff, weights)
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def subfamily(self):
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"""Get the SFNT SubFamily (ID 2)"""
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styles = self.style_token
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weights = self.weight_token
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if not self.rename_oblique:
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(weights, styles) = FontnameTools.make_oblique_style(weights, styles)
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if len(styles) == 0:
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if 'Oblique' in weights:
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return FontnameTools.concat(styles, 'Italic')
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return 'Regular'
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if 'Oblique' in weights and not 'Italic' in styles:
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return FontnameTools.concat(styles, 'Italic')
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return FontnameTools.concat(styles)
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def ps_familyname(self):
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"""Get the PS Familyname"""
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fam = self.preferred_family()
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if len(fam) < 1:
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fam = self.family()
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return self._make_ps_name(fam, True)
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def macstyle(self, style):
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"""Modify a given macStyle value for current name, just bits 0 and 1 touched"""
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b = style & (~3)
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b |= 1 if 'Bold' in self.style_token else 0
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b |= 2 if 'Italic' in self.style_token else 0
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return b
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def fs_selection(self, fs):
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"""Modify a given fsSelection value for current name, bits 0, 5, 6, 8, 9 touched"""
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ITALIC = 1 << 0; BOLD = 1 << 5; REGULAR = 1 << 6; WWS = 1 << 8; OBLIQUE = 1 << 9
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b = fs & (~(ITALIC | BOLD | REGULAR | WWS | OBLIQUE))
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if 'Bold' in self.style_token:
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b |= BOLD
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# Ignore Italic if we have Oblique
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if 'Oblique' in self.weight_token:
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b |= OBLIQUE
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if not self.rename_oblique:
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# If we have no dedicated italic, than oblique = italic
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b |= ITALIC
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elif 'Italic' in self.style_token:
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b |= ITALIC
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# Regular is just the basic weight
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if len(self.weight_token) == 0 and not b & (ITALIC | BOLD | OBLIQUE):
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b |= REGULAR
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b |= WWS # We assert this by our naming process
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return b
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def checklen(self, max_len, entry_id, name):
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"""Check the length of a name string and report violations"""
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if len(name) <= max_len:
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self.logger.debug('=====> {:18} ok ({:2} <={:2}): {}'.format(entry_id, len(name), max_len, name))
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else:
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self.logger.error('====-< {:18} too long ({:2} > {:2}): {}'.format(entry_id, len(name), max_len, name))
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return name
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def rename_font(self, font):
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"""Rename the font to include all information we found (font is fontforge font object)"""
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font.fondname = None
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font.fontname = self.psname()
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font.fullname = self.fullname()
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font.familyname = self.ps_familyname()
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# We have to work around several issues in fontforge:
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#
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# a. Remove some entries from SFNT table; fontforge has no API function for that
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#
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# b. Fontforge does not allow to set SubFamily (and other) to any value:
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#
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# Fontforge lets you set any value, unless it is the default value. If it
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# is the default value it does not set anything. It also does not remove
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# a previously existing non-default value. Why it is done this way is
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# unclear:
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# fontforge/python.c SetSFNTName() line 11431
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# return( 1 ); /* If they set it to the default, there's nothing to do */
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#
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# Then is the question: What is the default? It is taken from the
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# currently set fontname (??!). The fontname is parsed and everything
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# behind the dash is the default SubFamily:
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# fontforge/tottf.c DefaultTTFEnglishNames()
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# fontforge/splinefont.c _GetModifiers()
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#
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# To fix this without touching Fontforge we need to set the SubFamily
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# directly in the SFNT table:
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#
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# c. Fontforge has the bug that it allows to write empty-string to a SFNT field
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# and it is actually embedded as empty string, but empty strings are not
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# shown if you query the sfnt_names *rolleyes*
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version_tag = ''
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sfnt_list = []
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TO_DEL = ['Family', 'SubFamily', 'Fullname', 'PostScriptName', 'Preferred Family',
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'Preferred Styles', 'Compatible Full', 'WWS Family', 'WWS Subfamily',
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'UniqueID', 'CID findfont Name']
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# Remove these entries in all languages and add (at least the vital ones) some
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# back, but only as 'English (US)'. This makes sure we do not leave contradicting
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# names over different languages.
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for l, k, v in list(font.sfnt_names):
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if not k in TO_DEL:
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sfnt_list += [( l, k, v )]
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if k == 'Version' and l == 'English (US)':
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version_tag = ' ' + v.split()[-1]
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sfnt_list += [( 'English (US)', 'Family', self.checklen(31, 'Family (ID 1)', self.family()) )] # 1
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sfnt_list += [( 'English (US)', 'SubFamily', self.checklen(31, 'SubFamily (ID 2)', self.subfamily()) )] # 2
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sfnt_list += [( 'English (US)', 'UniqueID', self.fullname() + version_tag )] # 3
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sfnt_list += [( 'English (US)', 'Fullname', self.checklen(63, 'Fullname (ID 4)', self.fullname()) )] # 4
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sfnt_list += [( 'English (US)', 'PostScriptName', self.checklen(63, 'PSN (ID 6)', self.psname()) )] # 6
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p_fam = self.preferred_family()
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if len(p_fam):
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sfnt_list += [( 'English (US)', 'Preferred Family', self.checklen(31, 'PrefFamily (ID 16)', p_fam) )] # 16
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p_sty = self.preferred_styles()
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if len(p_sty):
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sfnt_list += [( 'English (US)', 'Preferred Styles', self.checklen(31, 'PrefStyles (ID 17)', p_sty) )] # 17
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font.sfnt_names = tuple(sfnt_list)
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font.macstyle = self.macstyle(0)
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font.os2_stylemap = self.fs_selection(0)
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