mirror of
https://github.com/ToxicFrog/Ligaturizer.git
synced 2024-08-16 13:20:41 +03:00
2c7bb65892
This updates the FiraCode OTFs to version 1.204, and makes ligaturize.py infer which one to use based on the name of the output file; e.g. if you name your output `Ligaturized-Bold` or `Ligaturized-BoldItalic`, it will use `FiraCode-Bold.otf` as the ligature source. It also lets the user explicitly specify the ligature source as a third command line argument if the inference is wrong (which opens the door to using non-Fira Code ligatures, too).
183 lines
6.6 KiB
Python
183 lines
6.6 KiB
Python
#!/usr/bin/env python
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#
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# usage: fontforge -lang=py ligaturize.py <input file> <output file> [ligature file]
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#
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# It will copy input to output, updating the embedded font name and splicing
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# in the ligatures from FiraCode-Medium.otf (which must be in $PWD). If the
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# ligature file is not specified, it will try to guess an appropriate Fira Code
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# OTF based on the name of the output file.
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#
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# See ligatures.py for a list of all the ligatures that will be copied.
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import fontforge
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import os
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from os import path
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import sys
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from ligatures import ligatures
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# Constants
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COPYRIGHT = '''
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Programming ligatures added by Ilya Skriblovsky from FiraCode
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FiraCode Copyright (c) 2015 by Nikita Prokopov'''
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def get_ligature_source(fontname):
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if len(sys.argv) > 3:
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# User explicitly told us which source to use.
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return sys.argv[3]
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for weight in ['Bold', 'Retina', 'Medium', 'Regular', 'Light']:
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if fontname.endswith('-' + weight):
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# Exact match for one of the Fira Code weights
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return 'fira/FiraCode-%s.otf' % weight
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# No exact match. Guess that we want 'Bold' if the font name has 'Bold' in
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# it, and 'Regular' otherwise.
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if 'Bold' in fontname:
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return 'fira/FiraCode-Bold.otf'
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return 'fira/FiraCode-Regular.otf'
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def get_output_font_details(fontpath):
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fontname = path.splitext(path.basename(fontpath))[0]
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if '-' in fontname:
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[family, weight] = fontname.split('-', 1)
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else:
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[family, weight] = [fontname, 'Regular']
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return {
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'filename': fontpath,
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'fontname': '%s-%s' % (family, weight),
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'fullname': '%s %s' % (split_camel_case(family), split_camel_case(weight)),
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'familyname': family,
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'copyright_add': COPYRIGHT,
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'unique_id': '%s-%s' % (family, weight),
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}
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# Add spaces to UpperCamelCase: 'DVCode' -> 'DV Code'
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def split_camel_case(str):
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acc = ''
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for (i, ch) in enumerate(str):
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prevIsSpace = i > 0 and acc[-1] == ' '
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nextIsLower = i + 1 < len(str) and str[i + 1].islower()
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isLast = i + 1 == len(str)
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if i != 0 and ch.isupper() and (nextIsLower or isLast) and not prevIsSpace:
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acc += ' ' + ch
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elif ch == '-' or ch == '_' or ch == '.':
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acc += ' '
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else:
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acc += ch
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return acc
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class LigatureCreator(object):
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def __init__(self, font, firacode):
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self.font = font
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self.firacode = firacode
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self._lig_counter = 0
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def copy_ligature_from_source(self, ligature_name):
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try:
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self.firacode.selection.none()
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self.firacode.selection.select(ligature_name)
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self.firacode.copy()
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return True
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except ValueError:
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return False
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def add_ligature(self, input_chars, firacode_ligature_name):
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if not self.copy_ligature_from_source(firacode_ligature_name):
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print('Error reading ligature %s from %s -- skipping' % (
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firacode_ligature_name, self.firacode.fontname))
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return
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self._lig_counter += 1
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ligature_name = 'lig.{}'.format(self._lig_counter)
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self.font.createChar(-1, ligature_name)
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self.font.selection.none()
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self.font.selection.select(ligature_name)
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self.font.paste()
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self.font.selection.none()
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self.font.selection.select('space')
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self.font.copy()
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lookup_name = lambda i: 'lookup.{}.{}'.format(self._lig_counter, i)
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lookup_sub_name = lambda i: 'lookup.sub.{}.{}'.format(self._lig_counter, i)
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cr_name = lambda i: 'CR.{}.{}'.format(self._lig_counter, i)
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for i, char in enumerate(input_chars):
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self.font.addLookup(lookup_name(i), 'gsub_single', (), ())
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self.font.addLookupSubtable(lookup_name(i), lookup_sub_name(i))
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if i < len(input_chars) - 1:
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self.font.createChar(-1, cr_name(i))
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self.font.selection.none()
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self.font.selection.select(cr_name(i))
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self.font.paste()
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self.font[char].addPosSub(lookup_sub_name(i), cr_name(i))
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else:
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self.font[char].addPosSub(lookup_sub_name(i), ligature_name)
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calt_lookup_name = 'calt.{}'.format(self._lig_counter)
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self.font.addLookup(calt_lookup_name, 'gsub_contextchain', (), (('calt', (('DFLT', ('dflt',)), ('arab', ('dflt',)), ('armn', ('dflt',)), ('cyrl', ('SRB ', 'dflt')), ('geor', ('dflt',)), ('grek', ('dflt',)), ('lao ', ('dflt',)), ('latn', ('CAT ', 'ESP ', 'GAL ', 'ISM ', 'KSM ', 'LSM ', 'MOL ', 'NSM ', 'ROM ', 'SKS ', 'SSM ', 'dflt')), ('math', ('dflt',)), ('thai', ('dflt',)))),))
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for i, char in enumerate(input_chars):
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ctx_subtable_name = 'calt.{}.{}'.format(self._lig_counter, i)
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ctx_spec = '{prev} | {cur} @<{lookup}> | {next}'.format(
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prev = ' '.join(cr_name(j) for j in range(i)),
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cur = char,
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lookup = lookup_name(i),
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next = ' '.join(input_chars[i+1:]),
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)
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self.font.addContextualSubtable(calt_lookup_name, ctx_subtable_name, 'glyph', ctx_spec)
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def change_font_names(font, fontname, fullname, familyname, copyright_add, unique_id):
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font.fontname = fontname
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font.fullname = fullname
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font.familyname = familyname
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font.copyright += copyright_add
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font.sfnt_names = tuple(
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(row[0], 'UniqueID', unique_id) if row[1] == 'UniqueID' else row
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for row in font.sfnt_names
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)
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input_font_path = sys.argv[1]
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output_font_path = sys.argv[2]
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output_font = get_output_font_details(output_font_path)
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font = fontforge.open(input_font_path)
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ligature_font_path = get_ligature_source(output_font['fontname'])
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print('Reading ligatures from %s' % ligature_font_path)
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firacode = fontforge.open(ligature_font_path)
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firacode.em = font.em
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creator = LigatureCreator(font, firacode)
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ligature_length = lambda lig: len(lig['chars'])
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for lig_spec in sorted(ligatures, key = ligature_length):
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try:
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creator.add_ligature(lig_spec['chars'], lig_spec['firacode_ligature_name'])
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except Exception as e:
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print('Exception while adding ligature: {}'.format(lig_spec))
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raise
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change_font_names(font, output_font['fontname'],
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output_font['fullname'],
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output_font['familyname'],
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output_font['copyright_add'],
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output_font['unique_id'])
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# Generate font & move to output directory
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output_name = output_font['filename']
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font.generate(output_name)
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os.rename(output_name, output_font_path)
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print "Generated ligaturized font %s in %s" % (output_font['fullname'], output_font_path)
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