blob: b5ed1b52a19d970f8fd65a2450cdc145234a058e [file] [log] [blame]
#!/usr/bin/env python
import collections
import glob
from os import path
import sys
from xml.etree import ElementTree
from fontTools import ttLib
LANG_TO_SCRIPT = {
'as': 'Beng',
'bn': 'Beng',
'cy': 'Latn',
'da': 'Latn',
'de': 'Latn',
'en': 'Latn',
'es': 'Latn',
'et': 'Latn',
'eu': 'Latn',
'fr': 'Latn',
'ga': 'Latn',
'gu': 'Gujr',
'hi': 'Deva',
'hr': 'Latn',
'hu': 'Latn',
'hy': 'Armn',
'ja': 'Jpan',
'kn': 'Knda',
'ko': 'Kore',
'ml': 'Mlym',
'mn': 'Cyrl',
'mr': 'Deva',
'nb': 'Latn',
'nn': 'Latn',
'or': 'Orya',
'pa': 'Guru',
'pt': 'Latn',
'sl': 'Latn',
'ta': 'Taml',
'te': 'Telu',
'tk': 'Latn',
}
def lang_to_script(lang_code):
lang = lang_code.lower()
while lang not in LANG_TO_SCRIPT:
hyphen_idx = lang.rfind('-')
assert hyphen_idx != -1, (
'We do not know what script the "%s" language is written in.'
% lang_code)
assumed_script = lang[hyphen_idx+1:]
if len(assumed_script) == 4 and assumed_script.isalpha():
# This is actually the script
return assumed_script.title()
lang = lang[:hyphen_idx]
return LANG_TO_SCRIPT[lang]
def get_best_cmap(font):
font_file, index = font
font_path = path.join(_fonts_dir, font_file)
if index is not None:
ttfont = ttLib.TTFont(font_path, fontNumber=index)
else:
ttfont = ttLib.TTFont(font_path)
all_unicode_cmap = None
bmp_cmap = None
for cmap in ttfont['cmap'].tables:
specifier = (cmap.format, cmap.platformID, cmap.platEncID)
if specifier == (4, 3, 1):
assert bmp_cmap is None, 'More than one BMP cmap in %s' % (font, )
bmp_cmap = cmap
elif specifier == (12, 3, 10):
assert all_unicode_cmap is None, (
'More than one UCS-4 cmap in %s' % (font, ))
all_unicode_cmap = cmap
return all_unicode_cmap.cmap if all_unicode_cmap else bmp_cmap.cmap
def assert_font_supports_any_of_chars(font, chars):
best_cmap = get_best_cmap(font)
for char in chars:
if char in best_cmap:
return
sys.exit('None of characters in %s were found in %s' % (chars, font))
def assert_font_supports_all_of_chars(font, chars):
best_cmap = get_best_cmap(font)
for char in chars:
assert char in best_cmap, (
'U+%04X was not found in %s' % (char, font))
def assert_font_supports_none_of_chars(font, chars):
best_cmap = get_best_cmap(font)
for char in chars:
assert char not in best_cmap, (
'U+%04X was found in %s' % (char, font))
def check_hyphens(hyphens_dir):
# Find all the scripts that need automatic hyphenation
scripts = set()
for hyb_file in glob.iglob(path.join(hyphens_dir, '*.hyb')):
hyb_file = path.basename(hyb_file)
assert hyb_file.startswith('hyph-'), (
'Unknown hyphenation file %s' % hyb_file)
lang_code = hyb_file[hyb_file.index('-')+1:hyb_file.index('.')]
scripts.add(lang_to_script(lang_code))
HYPHENS = {0x002D, 0x2010}
for script in scripts:
fonts = _script_to_font_map[script]
assert fonts, 'No fonts found for the "%s" script' % script
for font in fonts:
assert_font_supports_any_of_chars(font, HYPHENS)
def parse_fonts_xml(fonts_xml_path):
global _script_to_font_map, _fallback_chain
_script_to_font_map = collections.defaultdict(set)
_fallback_chain = []
tree = ElementTree.parse(fonts_xml_path)
for family in tree.findall('family'):
name = family.get('name')
variant = family.get('variant')
langs = family.get('lang')
if name:
assert variant is None, (
'No variant expected for LGC font %s.' % name)
assert langs is None, (
'No language expected for LGC fonts %s.' % name)
else:
assert variant in {None, 'elegant', 'compact'}, (
'Unexpected value for variant: %s' % variant)
if langs:
langs = langs.split()
scripts = {lang_to_script(lang) for lang in langs}
else:
scripts = set()
for child in family:
assert child.tag == 'font', (
'Unknown tag <%s>' % child.tag)
font_file = child.text
weight = int(child.get('weight'))
assert weight % 100 == 0, (
'Font weight "%d" is not a multiple of 100.' % weight)
style = child.get('style')
assert style in {'normal', 'italic'}, (
'Unknown style "%s"' % style)
index = child.get('index')
if index:
index = int(index)
_fallback_chain.append((
name,
frozenset(scripts),
variant,
weight,
style,
(font_file, index)))
if name: # non-empty names are used for default LGC fonts
map_scripts = {'Latn', 'Grek', 'Cyrl'}
else:
map_scripts = scripts
for script in map_scripts:
_script_to_font_map[script].add((font_file, index))
def check_emoji_availability():
emoji_fonts = [font[5] for font in _fallback_chain if 'Zsye' in font[1]]
assert len(emoji_fonts) == 1, 'There are %d emoji fonts.' % len(emoji_fonts)
emoji_font = emoji_fonts[0]
emoji_chars = _emoji_properties['Emoji']
assert_font_supports_all_of_chars(emoji_font, emoji_chars)
def check_emoji_defaults():
default_emoji_chars = _emoji_properties['Emoji_Presentation']
missing_text_chars = _emoji_properties['Emoji'] - default_emoji_chars
emoji_font_seen = False
for name, scripts, variant, weight, style, font in _fallback_chain:
if 'Zsye' in scripts:
emoji_font_seen = True
# No need to check the emoji font
continue
# For later fonts, we only check them if they have a script
# defined, since the defined script may get them to a higher
# score even if they appear after the emoji font.
if emoji_font_seen and not scripts:
continue
# Check default emoji-style characters
assert_font_supports_none_of_chars(font, sorted(default_emoji_chars))
# Mark default text-style characters appearing in fonts above the emoji
# font as seen
if not emoji_font_seen:
missing_text_chars -= set(get_best_cmap(font))
# Noto does not have monochrome symbols for Unicode 7.0 wingdings and
# webdings
missing_text_chars -= _chars_by_age['7.0']
# TODO: Remove these after b/26113320 is fixed
missing_text_chars -= {
0x263A, # WHITE SMILING FACE
0x270C, # VICTORY HAND
0x2744, # SNOWFLAKE
0x2764, # HEAVY BLACK HEART
}
assert missing_text_chars == set(), (
'Text style version of some emoji characters are missing.')
# Setting reverse to true returns a dictionary that maps the values to sets of
# characters, useful for some binary properties. Otherwise, we get a
# dictionary that maps characters to the property values, assuming there's only
# one property in the file.
def parse_unicode_datafile(file_path, reverse=False):
if reverse:
output_dict = collections.defaultdict(set)
else:
output_dict = {}
with open(file_path) as datafile:
for line in datafile:
if '#' in line:
line = line[:line.index('#')]
line = line.strip()
if not line:
continue
char_range, prop = line.split(';')
char_range = char_range.strip()
prop = prop.strip()
if '..' in char_range:
char_start, char_end = char_range.split('..')
else:
char_start = char_end = char_range
char_start = int(char_start, 16)
char_end = int(char_end, 16)
char_range = xrange(char_start, char_end+1)
if reverse:
output_dict[prop].update(char_range)
else:
for char in char_range:
assert char not in output_dict
output_dict[char] = prop
return output_dict
def parse_ucd(ucd_path):
global _emoji_properties, _chars_by_age
_emoji_properties = parse_unicode_datafile(
path.join(ucd_path, 'emoji-data.txt'), reverse=True)
_chars_by_age = parse_unicode_datafile(
path.join(ucd_path, 'DerivedAge.txt'), reverse=True)
def main():
target_out = sys.argv[1]
global _fonts_dir
_fonts_dir = path.join(target_out, 'fonts')
fonts_xml_path = path.join(target_out, 'etc', 'fonts.xml')
parse_fonts_xml(fonts_xml_path)
hyphens_dir = path.join(target_out, 'usr', 'hyphen-data')
check_hyphens(hyphens_dir)
check_emoji = sys.argv[2]
if check_emoji == 'true':
ucd_path = sys.argv[3]
parse_ucd(ucd_path)
check_emoji_availability()
check_emoji_defaults()
if __name__ == '__main__':
main()