Function genCSS

misc/tools/subset.py:371–411

(fontinfo, subsets)

def genCSS(fontinfo, subsets):
  outfileTemplate = pjoin(BASEDIR, fontinfo['outfile'])

  css_family = fontinfo.get('css_family', 'Inter')
  css_style  = fontinfo.get('css_style', 'normal')
  css_weight = fontinfo.get('css_weight', '400')
  css_extra  = fontinfo.get('css_extra', '')
  if len(css_extra) > 0:
    css_extra = '\n  ' + css_extra
  css = []

  for subset in list(subsets) + [{ 'name':'extra' }]:
    outfile = outfileTemplate.format(subset=subset['name'])
    # Read effective codepoint coverage. This may be greater than requested
    # in case of OT features. For example, the Latin subset includes some common arrow
    # glyphs since "->" is a ligature for "→".
    font = ttLib.TTFont(outfile)
    unicodes = set(getUnicodeMap(font))
    if min(unicodes) < 0x30:
      # the "base" (latin) subset. extend it to include control codepoints
      controlCodepoints, _ = genUnicodeRange([range(0x0000, 0x001F)])
      unicodes = unicodes.union(controlCodepoints)
    _, unicodeRange = genUnicodeRange(genCompactIntRanges(unicodes))
    css.append(CSS_TEMPLATE.format(
      comment=subset['name'],
      filename=basename(outfile),
      unicode_range=unicodeRange,
      family=css_family,
      style=css_style,
      weight=css_weight,
      extra=css_extra,
    ).strip())

  # From the CSS spec on unicode-range descriptor:
  #   "If the Unicode ranges overlap for a set of @font-face rules with the same family
  #    and style descriptor values, the rules are ordered in the reverse order they were
  #    defined; the last rule defined is the first to be checked for a given character."
  # https://www.w3.org/TR/css-fonts-4/#unicode-range-desc
  css.reverse()

  return '\n'.join(css)


def relpath(path):