2b8b819fee
These are not yet ready for updating in the unicode data, so we patch them in code until they are. Bug: 30594617 Change-Id: Ib4c8568aa4840341474eb0c0c95674d640473f4d
628 lines
21 KiB
Python
Executable File
628 lines
21 KiB
Python
Executable File
#!/usr/bin/env python
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import collections
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import copy
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import glob
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import itertools
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from os import path
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import sys
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from xml.etree import ElementTree
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from fontTools import ttLib
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EMOJI_VS = 0xFE0F
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LANG_TO_SCRIPT = {
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'as': 'Beng',
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'bn': 'Beng',
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'cy': 'Latn',
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'da': 'Latn',
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'de': 'Latn',
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'en': 'Latn',
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'es': 'Latn',
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'et': 'Latn',
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'eu': 'Latn',
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'fr': 'Latn',
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'ga': 'Latn',
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'gu': 'Gujr',
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'hi': 'Deva',
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'hr': 'Latn',
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'hu': 'Latn',
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'hy': 'Armn',
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'ja': 'Jpan',
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'kn': 'Knda',
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'ko': 'Kore',
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'ml': 'Mlym',
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'mn': 'Cyrl',
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'mr': 'Deva',
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'nb': 'Latn',
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'nn': 'Latn',
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'or': 'Orya',
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'pa': 'Guru',
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'pt': 'Latn',
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'sl': 'Latn',
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'ta': 'Taml',
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'te': 'Telu',
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'tk': 'Latn',
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}
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def lang_to_script(lang_code):
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lang = lang_code.lower()
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while lang not in LANG_TO_SCRIPT:
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hyphen_idx = lang.rfind('-')
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assert hyphen_idx != -1, (
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'We do not know what script the "%s" language is written in.'
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% lang_code)
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assumed_script = lang[hyphen_idx+1:]
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if len(assumed_script) == 4 and assumed_script.isalpha():
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# This is actually the script
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return assumed_script.title()
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lang = lang[:hyphen_idx]
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return LANG_TO_SCRIPT[lang]
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def printable(inp):
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if type(inp) is set: # set of character sequences
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return '{' + ', '.join([printable(seq) for seq in inp]) + '}'
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if type(inp) is tuple: # character sequence
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return '<' + (', '.join([printable(ch) for ch in inp])) + '>'
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else: # single character
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return 'U+%04X' % inp
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def open_font(font):
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font_file, index = font
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font_path = path.join(_fonts_dir, font_file)
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if index is not None:
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return ttLib.TTFont(font_path, fontNumber=index)
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else:
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return ttLib.TTFont(font_path)
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def get_best_cmap(font):
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ttfont = open_font(font)
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all_unicode_cmap = None
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bmp_cmap = None
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for cmap in ttfont['cmap'].tables:
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specifier = (cmap.format, cmap.platformID, cmap.platEncID)
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if specifier == (4, 3, 1):
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assert bmp_cmap is None, 'More than one BMP cmap in %s' % (font, )
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bmp_cmap = cmap
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elif specifier == (12, 3, 10):
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assert all_unicode_cmap is None, (
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'More than one UCS-4 cmap in %s' % (font, ))
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all_unicode_cmap = cmap
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return all_unicode_cmap.cmap if all_unicode_cmap else bmp_cmap.cmap
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def get_variation_sequences_cmap(font):
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ttfont = open_font(font)
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vs_cmap = None
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for cmap in ttfont['cmap'].tables:
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specifier = (cmap.format, cmap.platformID, cmap.platEncID)
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if specifier == (14, 0, 5):
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assert vs_cmap is None, 'More than one VS cmap in %s' % (font, )
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vs_cmap = cmap
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return vs_cmap
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def get_emoji_map(font):
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# Add normal characters
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emoji_map = copy.copy(get_best_cmap(font))
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reverse_cmap = {glyph: code for code, glyph in emoji_map.items()}
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# Add variation sequences
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vs_dict = get_variation_sequences_cmap(font).uvsDict
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for vs in vs_dict:
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for base, glyph in vs_dict[vs]:
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if glyph is None:
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emoji_map[(base, vs)] = emoji_map[base]
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else:
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emoji_map[(base, vs)] = glyph
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# Add GSUB rules
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ttfont = open_font(font)
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for lookup in ttfont['GSUB'].table.LookupList.Lookup:
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assert lookup.LookupType == 4, 'We only understand type 4 lookups'
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for subtable in lookup.SubTable:
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ligatures = subtable.ligatures
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for first_glyph in ligatures:
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for ligature in ligatures[first_glyph]:
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sequence = [first_glyph] + ligature.Component
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sequence = [reverse_cmap[glyph] for glyph in sequence]
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sequence = tuple(sequence)
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# Make sure no starting subsequence of 'sequence' has been
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# seen before.
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for sub_len in range(2, len(sequence)+1):
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subsequence = sequence[:sub_len]
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assert subsequence not in emoji_map
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emoji_map[sequence] = ligature.LigGlyph
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return emoji_map
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def assert_font_supports_any_of_chars(font, chars):
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best_cmap = get_best_cmap(font)
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for char in chars:
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if char in best_cmap:
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return
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sys.exit('None of characters in %s were found in %s' % (chars, font))
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def assert_font_supports_all_of_chars(font, chars):
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best_cmap = get_best_cmap(font)
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for char in chars:
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assert char in best_cmap, (
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'U+%04X was not found in %s' % (char, font))
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def assert_font_supports_none_of_chars(font, chars):
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best_cmap = get_best_cmap(font)
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for char in chars:
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assert char not in best_cmap, (
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'U+%04X was found in %s' % (char, font))
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def assert_font_supports_all_sequences(font, sequences):
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vs_dict = get_variation_sequences_cmap(font).uvsDict
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for base, vs in sorted(sequences):
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assert vs in vs_dict and (base, None) in vs_dict[vs], (
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'<U+%04X, U+%04X> was not found in %s' % (base, vs, font))
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def check_hyphens(hyphens_dir):
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# Find all the scripts that need automatic hyphenation
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scripts = set()
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for hyb_file in glob.iglob(path.join(hyphens_dir, '*.hyb')):
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hyb_file = path.basename(hyb_file)
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assert hyb_file.startswith('hyph-'), (
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'Unknown hyphenation file %s' % hyb_file)
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lang_code = hyb_file[hyb_file.index('-')+1:hyb_file.index('.')]
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scripts.add(lang_to_script(lang_code))
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HYPHENS = {0x002D, 0x2010}
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for script in scripts:
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fonts = _script_to_font_map[script]
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assert fonts, 'No fonts found for the "%s" script' % script
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for font in fonts:
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assert_font_supports_any_of_chars(font, HYPHENS)
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class FontRecord(object):
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def __init__(self, name, scripts, variant, weight, style, font):
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self.name = name
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self.scripts = scripts
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self.variant = variant
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self.weight = weight
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self.style = style
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self.font = font
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def parse_fonts_xml(fonts_xml_path):
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global _script_to_font_map, _fallback_chain
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_script_to_font_map = collections.defaultdict(set)
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_fallback_chain = []
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tree = ElementTree.parse(fonts_xml_path)
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for family in tree.findall('family'):
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name = family.get('name')
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variant = family.get('variant')
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langs = family.get('lang')
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if name:
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assert variant is None, (
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'No variant expected for LGC font %s.' % name)
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assert langs is None, (
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'No language expected for LGC fonts %s.' % name)
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else:
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assert variant in {None, 'elegant', 'compact'}, (
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'Unexpected value for variant: %s' % variant)
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if langs:
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langs = langs.split()
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scripts = {lang_to_script(lang) for lang in langs}
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else:
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scripts = set()
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for child in family:
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assert child.tag == 'font', (
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'Unknown tag <%s>' % child.tag)
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font_file = child.text
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weight = int(child.get('weight'))
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assert weight % 100 == 0, (
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'Font weight "%d" is not a multiple of 100.' % weight)
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style = child.get('style')
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assert style in {'normal', 'italic'}, (
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'Unknown style "%s"' % style)
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index = child.get('index')
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if index:
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index = int(index)
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_fallback_chain.append(FontRecord(
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name,
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frozenset(scripts),
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variant,
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weight,
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style,
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(font_file, index)))
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if name: # non-empty names are used for default LGC fonts
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map_scripts = {'Latn', 'Grek', 'Cyrl'}
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else:
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map_scripts = scripts
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for script in map_scripts:
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_script_to_font_map[script].add((font_file, index))
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def check_emoji_coverage(all_emoji, equivalent_emoji):
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emoji_font = get_emoji_font()
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check_emoji_font_coverage(emoji_font, all_emoji, equivalent_emoji)
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def get_emoji_font():
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emoji_fonts = [
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record.font for record in _fallback_chain
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if 'Zsye' in record.scripts]
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assert len(emoji_fonts) == 1, 'There are %d emoji fonts.' % len(emoji_fonts)
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return emoji_fonts[0]
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def check_emoji_font_coverage(emoji_font, all_emoji, equivalent_emoji):
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coverage = get_emoji_map(emoji_font)
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for sequence in all_emoji:
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assert sequence in coverage, (
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'%s is not supported in the emoji font.' % printable(sequence))
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for sequence in coverage:
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if sequence in {0x0000, 0x000D, 0x0020}:
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# The font needs to support a few extra characters, which is OK
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continue
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assert sequence in all_emoji, (
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'Emoji font should not support %s.' % printable(sequence))
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for first, second in sorted(equivalent_emoji.items()):
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assert coverage[first] == coverage[second], (
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'%s and %s should map to the same glyph.' % (
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printable(first),
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printable(second)))
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for glyph in set(coverage.values()):
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maps_to_glyph = [seq for seq in coverage if coverage[seq] == glyph]
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if len(maps_to_glyph) > 1:
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# There are more than one sequences mapping to the same glyph. We
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# need to make sure they were expected to be equivalent.
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equivalent_seqs = set()
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for seq in maps_to_glyph:
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equivalent_seq = seq
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while equivalent_seq in equivalent_emoji:
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equivalent_seq = equivalent_emoji[equivalent_seq]
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equivalent_seqs.add(equivalent_seq)
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assert len(equivalent_seqs) == 1, (
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'The sequences %s should not result in the same glyph %s' % (
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printable(equivalent_seqs),
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glyph))
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def check_emoji_defaults(default_emoji):
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missing_text_chars = _emoji_properties['Emoji'] - default_emoji
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emoji_font_seen = False
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for record in _fallback_chain:
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if 'Zsye' in record.scripts:
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emoji_font_seen = True
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# No need to check the emoji font
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continue
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# For later fonts, we only check them if they have a script
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# defined, since the defined script may get them to a higher
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# score even if they appear after the emoji font.
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if emoji_font_seen and not record.scripts:
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continue
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# Check default emoji-style characters
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assert_font_supports_none_of_chars(record.font, sorted(default_emoji))
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# Mark default text-style characters appearing in fonts above the emoji
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# font as seen
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if not emoji_font_seen:
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missing_text_chars -= set(get_best_cmap(record.font))
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# Noto does not have monochrome glyphs for Unicode 7.0 wingdings and
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# webdings yet.
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missing_text_chars -= _chars_by_age['7.0']
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assert missing_text_chars == set(), (
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'Text style version of some emoji characters are missing: ' +
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repr(missing_text_chars))
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# Setting reverse to true returns a dictionary that maps the values to sets of
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# characters, useful for some binary properties. Otherwise, we get a
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# dictionary that maps characters to the property values, assuming there's only
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# one property in the file.
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def parse_unicode_datafile(file_path, reverse=False):
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if reverse:
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output_dict = collections.defaultdict(set)
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else:
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output_dict = {}
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with open(file_path) as datafile:
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for line in datafile:
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if '#' in line:
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line = line[:line.index('#')]
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line = line.strip()
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if not line:
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continue
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chars, prop = line.split(';')[:2]
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chars = chars.strip()
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prop = prop.strip()
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if ' ' in chars: # character sequence
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sequence = [int(ch, 16) for ch in chars.split(' ')]
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additions = [tuple(sequence)]
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elif '..' in chars: # character range
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char_start, char_end = chars.split('..')
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char_start = int(char_start, 16)
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char_end = int(char_end, 16)
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additions = xrange(char_start, char_end+1)
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else: # singe character
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additions = [int(chars, 16)]
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if reverse:
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output_dict[prop].update(additions)
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else:
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for addition in additions:
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assert addition not in output_dict
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output_dict[addition] = prop
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return output_dict
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def parse_standardized_variants(file_path):
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emoji_set = set()
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text_set = set()
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with open(file_path) as datafile:
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for line in datafile:
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if '#' in line:
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line = line[:line.index('#')]
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line = line.strip()
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if not line:
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continue
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sequence, description, _ = line.split(';')
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sequence = sequence.strip().split(' ')
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base = int(sequence[0], 16)
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vs = int(sequence[1], 16)
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description = description.strip()
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if description == 'text style':
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text_set.add((base, vs))
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elif description == 'emoji style':
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emoji_set.add((base, vs))
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return text_set, emoji_set
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def parse_ucd(ucd_path):
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global _emoji_properties, _chars_by_age
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global _text_variation_sequences, _emoji_variation_sequences
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global _emoji_sequences, _emoji_zwj_sequences
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_emoji_properties = parse_unicode_datafile(
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path.join(ucd_path, 'emoji-data.txt'), reverse=True)
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_chars_by_age = parse_unicode_datafile(
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path.join(ucd_path, 'DerivedAge.txt'), reverse=True)
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sequences = parse_standardized_variants(
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path.join(ucd_path, 'StandardizedVariants.txt'))
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_text_variation_sequences, _emoji_variation_sequences = sequences
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_emoji_sequences = parse_unicode_datafile(
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path.join(ucd_path, 'emoji-sequences.txt'))
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_emoji_zwj_sequences = parse_unicode_datafile(
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path.join(ucd_path, 'emoji-zwj-sequences.txt'))
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def flag_sequence(territory_code):
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return tuple(0x1F1E6 + ord(ch) - ord('A') for ch in territory_code)
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UNSUPPORTED_FLAGS = frozenset({
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flag_sequence('BL'), flag_sequence('BQ'), flag_sequence('DG'),
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flag_sequence('EA'), flag_sequence('EH'), flag_sequence('FK'),
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flag_sequence('GF'), flag_sequence('GP'), flag_sequence('GS'),
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flag_sequence('MF'), flag_sequence('MQ'), flag_sequence('NC'),
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flag_sequence('PM'), flag_sequence('RE'), flag_sequence('TF'),
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flag_sequence('UN'), flag_sequence('WF'), flag_sequence('XK'),
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flag_sequence('YT'),
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})
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EQUIVALENT_FLAGS = {
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flag_sequence('BV'): flag_sequence('NO'),
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flag_sequence('CP'): flag_sequence('FR'),
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flag_sequence('HM'): flag_sequence('AU'),
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flag_sequence('SJ'): flag_sequence('NO'),
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flag_sequence('UM'): flag_sequence('US'),
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}
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COMBINING_KEYCAP = 0x20E3
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# Characters that Android defaults to emoji style, different from the recommendations in UTR #51
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ANDROID_DEFAULT_EMOJI = frozenset({
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0x2600, # BLACK SUN WITH RAYS
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0x2601, # CLOUD
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0x260E, # BLACK TELEPHONE
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0x261D, # WHITE UP POINTING INDEX
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0x263A, # WHITE SMILING FACE
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0x2660, # BLACK SPADE SUIT
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0x2663, # BLACK CLUB SUIT
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0x2665, # BLACK HEART SUIT
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0x2666, # BLACK DIAMOND SUIT
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0x270C, # VICTORY HAND
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0x2744, # SNOWFLAKE
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0x2764, # HEAVY BLACK HEART
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})
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LEGACY_ANDROID_EMOJI = {
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0xFE4E5: flag_sequence('JP'),
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0xFE4E6: flag_sequence('US'),
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0xFE4E7: flag_sequence('FR'),
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0xFE4E8: flag_sequence('DE'),
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0xFE4E9: flag_sequence('IT'),
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0xFE4EA: flag_sequence('GB'),
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0xFE4EB: flag_sequence('ES'),
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0xFE4EC: flag_sequence('RU'),
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0xFE4ED: flag_sequence('CN'),
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0xFE4EE: flag_sequence('KR'),
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0xFE82C: (ord('#'), COMBINING_KEYCAP),
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0xFE82E: (ord('1'), COMBINING_KEYCAP),
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0xFE82F: (ord('2'), COMBINING_KEYCAP),
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0xFE830: (ord('3'), COMBINING_KEYCAP),
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0xFE831: (ord('4'), COMBINING_KEYCAP),
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0xFE832: (ord('5'), COMBINING_KEYCAP),
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0xFE833: (ord('6'), COMBINING_KEYCAP),
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0xFE834: (ord('7'), COMBINING_KEYCAP),
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0xFE835: (ord('8'), COMBINING_KEYCAP),
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0xFE836: (ord('9'), COMBINING_KEYCAP),
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0xFE837: (ord('0'), COMBINING_KEYCAP),
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|
}
|
|
|
|
ZWJ_IDENTICALS = {
|
|
# KISS
|
|
(0x1F469, 0x200D, 0x2764, 0x200D, 0x1F48B, 0x200D, 0x1F468): 0x1F48F,
|
|
# COUPLE WITH HEART
|
|
(0x1F469, 0x200D, 0x2764, 0x200D, 0x1F468): 0x1F491,
|
|
# FAMILY
|
|
(0x1F468, 0x200D, 0x1F469, 0x200D, 0x1F466): 0x1F46A,
|
|
}
|
|
|
|
|
|
def is_fitzpatrick_modifier(cp):
|
|
return 0x1F3FB <= cp <= 0x1F3FF
|
|
|
|
|
|
def reverse_emoji(seq):
|
|
rev = list(reversed(seq))
|
|
# if there are fitzpatrick modifiers in the sequence, keep them after
|
|
# the emoji they modify
|
|
for i in xrange(1, len(rev)):
|
|
if is_fitzpatrick_modifier(rev[i-1]):
|
|
rev[i], rev[i-1] = rev[i-1], rev[i]
|
|
return tuple(rev)
|
|
|
|
|
|
def compute_expected_emoji():
|
|
equivalent_emoji = {}
|
|
sequence_pieces = set()
|
|
all_sequences = set()
|
|
all_sequences.update(_emoji_variation_sequences)
|
|
|
|
# add zwj sequences not in the current emoji-zwj-sequences.txt
|
|
adjusted_emoji_zwj_sequences = dict(_emoji_zwj_sequences)
|
|
adjusted_emoji_zwj_sequences.update(_emoji_zwj_sequences)
|
|
# single parent families
|
|
additional_emoji_zwj = (
|
|
(0x1F468, 0x200D, 0x1F466),
|
|
(0x1F468, 0x200D, 0x1F467),
|
|
(0x1F468, 0x200D, 0x1F466, 0x200D, 0x1F466),
|
|
(0x1F468, 0x200D, 0x1F467, 0x200D, 0x1F466),
|
|
(0x1F468, 0x200D, 0x1F467, 0x200D, 0x1F467),
|
|
(0x1F469, 0x200D, 0x1F466),
|
|
(0x1F469, 0x200D, 0x1F467),
|
|
(0x1F469, 0x200D, 0x1F466, 0x200D, 0x1F466),
|
|
(0x1F469, 0x200D, 0x1F467, 0x200D, 0x1F466),
|
|
(0x1F469, 0x200D, 0x1F467, 0x200D, 0x1F467),
|
|
)
|
|
# sequences formed from man and woman and optional fitzpatrick modifier
|
|
modified_extensions = (
|
|
0x2696,
|
|
0x2708,
|
|
0x1F3A8,
|
|
0x1F680,
|
|
0x1F692,
|
|
)
|
|
for seq in additional_emoji_zwj:
|
|
adjusted_emoji_zwj_sequences[seq] = 'Emoji_ZWJ_Sequence'
|
|
for ext in modified_extensions:
|
|
for base in (0x1F468, 0x1F469):
|
|
seq = (base, 0x200D, ext)
|
|
adjusted_emoji_zwj_sequences[seq] = 'Emoji_ZWJ_Sequence'
|
|
for modifier in range(0x1F3FB, 0x1F400):
|
|
seq = (base, modifier, 0x200D, ext)
|
|
adjusted_emoji_zwj_sequences[seq] = 'Emoji_ZWJ_Sequence'
|
|
|
|
for sequence in _emoji_sequences.keys():
|
|
sequence = tuple(ch for ch in sequence if ch != EMOJI_VS)
|
|
all_sequences.add(sequence)
|
|
sequence_pieces.update(sequence)
|
|
|
|
for sequence in adjusted_emoji_zwj_sequences.keys():
|
|
sequence = tuple(ch for ch in sequence if ch != EMOJI_VS)
|
|
all_sequences.add(sequence)
|
|
sequence_pieces.update(sequence)
|
|
# Add reverse of all emoji ZWJ sequences, which are added to the fonts
|
|
# as a workaround to get the sequences work in RTL text.
|
|
reversed_seq = reverse_emoji(sequence)
|
|
all_sequences.add(reversed_seq)
|
|
equivalent_emoji[reversed_seq] = sequence
|
|
|
|
# Add all two-letter flag sequences, as even the unsupported ones should
|
|
# resolve to a flag tofu.
|
|
all_letters = [chr(code) for code in range(ord('A'), ord('Z')+1)]
|
|
all_two_letter_codes = itertools.product(all_letters, repeat=2)
|
|
all_flags = {flag_sequence(code) for code in all_two_letter_codes}
|
|
all_sequences.update(all_flags)
|
|
tofu_flags = UNSUPPORTED_FLAGS | (all_flags - set(_emoji_sequences.keys()))
|
|
|
|
all_emoji = (
|
|
_emoji_properties['Emoji'] |
|
|
all_sequences |
|
|
sequence_pieces |
|
|
set(LEGACY_ANDROID_EMOJI.keys()))
|
|
default_emoji = (
|
|
_emoji_properties['Emoji_Presentation'] |
|
|
ANDROID_DEFAULT_EMOJI |
|
|
all_sequences |
|
|
set(LEGACY_ANDROID_EMOJI.keys()))
|
|
|
|
first_tofu_flag = sorted(tofu_flags)[0]
|
|
for flag in tofu_flags:
|
|
if flag != first_tofu_flag:
|
|
equivalent_emoji[flag] = first_tofu_flag
|
|
equivalent_emoji.update(EQUIVALENT_FLAGS)
|
|
equivalent_emoji.update(LEGACY_ANDROID_EMOJI)
|
|
equivalent_emoji.update(ZWJ_IDENTICALS)
|
|
for seq in _emoji_variation_sequences:
|
|
equivalent_emoji[seq] = seq[0]
|
|
|
|
return all_emoji, default_emoji, equivalent_emoji
|
|
|
|
|
|
def check_vertical_metrics():
|
|
for record in _fallback_chain:
|
|
if record.name in ['sans-serif', 'sans-serif-condensed']:
|
|
font = open_font(record.font)
|
|
assert font['head'].yMax == 2163 and font['head'].yMin == -555, (
|
|
'yMax and yMin of %s do not match expected values.' % (record.font,))
|
|
|
|
if record.name in ['sans-serif', 'sans-serif-condensed', 'serif', 'monospace']:
|
|
font = open_font(record.font)
|
|
assert font['hhea'].ascent == 1900 and font['hhea'].descent == -500, (
|
|
'ascent and descent of %s do not match expected values.' % (record.font,))
|
|
|
|
|
|
def main():
|
|
global _fonts_dir
|
|
target_out = sys.argv[1]
|
|
_fonts_dir = path.join(target_out, 'fonts')
|
|
|
|
fonts_xml_path = path.join(target_out, 'etc', 'fonts.xml')
|
|
parse_fonts_xml(fonts_xml_path)
|
|
|
|
check_vertical_metrics()
|
|
|
|
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)
|
|
all_emoji, default_emoji, equivalent_emoji = compute_expected_emoji()
|
|
check_emoji_coverage(all_emoji, equivalent_emoji)
|
|
check_emoji_defaults(default_emoji)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|