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Only consider emoji characters with emoji presentation to have width two

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Fixes #308
This commit is contained in:
Kovid Goyal
2018-02-04 22:27:34 +05:30
parent b667e3a577
commit b9857f9499
6 changed files with 302 additions and 204 deletions
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13
gen-wcwidth.py
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@@ -11,9 +11,6 @@ from itertools import groupby
from operator import itemgetter
from urllib.request import urlopen
# We ignore the first few emojis as they are widely assumed to be single width
# in legacy applications
FIRST_EMOJI = 0x2194
os.chdir(os.path.dirname(os.path.abspath(__file__)))
@@ -79,10 +76,9 @@ emoji_categories = {}
def parse_emoji():
for line in get_data('emoji-data.txt', 'emoji'):
chars, rest = split_two(line)
if max(chars) >= FIRST_EMOJI:
s = emoji_categories.setdefault(rest, set())
s |= chars
all_emoji.update(chars)
s = emoji_categories.setdefault(rest, set())
s.update(chars)
all_emoji.update(chars)
doublewidth, ambiguous = set(), set()
@@ -225,9 +221,10 @@ def gen_wcwidth():
add(p, 'Non-printing characters', non_printing, -1)
add(p, 'Marks', marks, -1)
add(p, 'Private use', class_maps['Co'], -3)
add(p, 'Text Presentation', emoji_categories['Emoji'] - emoji_categories['Emoji_Presentation'], 1)
add(p, 'East Asian ambiguous width', ambiguous, -2)
add(p, 'East Asian double width', doublewidth, 2)
add(p, 'Emoji', all_emoji, 2)
add(p, 'Emoji Presentation', emoji_categories['Emoji_Presentation'], 2)
add(p, 'Not assigned in the unicode character database', not_assigned, -1)