Android/frameworks_base
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Update fontchain_linter for non-compat font

Browse Source 
Bug: 255901351
Test: m fontchain_lint
Change-Id: If60de61504188a7222e2efa67705b8bf4400dbda
Merged-In: If60de61504188a7222e2efa67705b8bf4400dbda
This commit is contained in:
Seigo Nonaka
2022-10-28 11:30:37 +09:00
parent be69929b02
commit 11e64ca5c8
1 changed files with 4 additions and 52 deletions
Download Patch File Download Diff File Expand all files Collapse all files

56
tools/fonts/fontchain_linter.py
View File

@@ -381,62 +381,14 @@ def hex_strs(sequence):
return tuple(f"{s:X}" for s in sequence)
return hex(sequence)
def check_plausible_compat_pua(coverage, all_emoji, equivalent_emoji):
# A PUA should point to every RGI emoji and that PUA should be unique to the
# set of equivalent sequences for the emoji.
problems = []
for seq in all_emoji:
# We're looking to match not-PUA with PUA so filter out existing PUA
if contains_pua(seq):
continue
# Filter out non-RGI things that end up in all_emoji
if only_tags(seq) or seq in {ZWJ, COMBINING_KEYCAP, EMPTY_FLAG_SEQUENCE}:
continue
equivalents = [seq]
if seq in equivalent_emoji:
equivalents.append(equivalent_emoji[seq])
# If there are problems the hex code is much more useful
log_equivalents = [hex_strs(s) for s in equivalents]
# The system compat font should NOT include regional indicators as these have been split out
if contains_regional_indicator(seq):
assert not any(s in coverage for s in equivalents), f"Regional indicators not expected in compat font, found {log_equivalents}"
continue
glyph = {coverage[e] for e in equivalents}
if len(glyph) != 1:
problems.append(f"{log_equivalents} should all point to the same glyph")
continue
glyph = next(iter(glyph))
pua = {s for s, g in coverage.items() if contains_pua(s) and g == glyph}
if not pua:
problems.append(f"Expected PUA for {log_equivalents} but none exist")
continue
assert not problems, "\n".join(sorted(problems)) + f"\n{len(problems)} PUA problems"
def check_emoji_compat(all_emoji, equivalent_emoji):
def check_emoji_not_compat(all_emoji, equivalent_emoji):
compat_psnames = set()
for emoji_font in get_emoji_fonts():
ttf = open_font(emoji_font)
psname = get_psname(ttf)
is_compat_font = "meta" in ttf and 'Emji' in ttf["meta"].data
if not is_compat_font:
continue
compat_psnames.add(psname)
# If the font has compat metadata it should have PUAs for emoji sequences
coverage = get_emoji_map(emoji_font)
check_plausible_compat_pua(coverage, all_emoji, equivalent_emoji)
# NotoColorEmoji must be a Compat font.
assert 'NotoColorEmoji' in compat_psnames, 'NotoColorEmoji MUST be a compat font'
if "meta" in ttf:
assert 'Emji' not in ttf["meta"].data, 'NotoColorEmoji MUST NOT be a compat font'
def check_emoji_font_coverage(emoji_fonts, all_emoji, equivalent_emoji):
@@ -847,7 +799,7 @@ def main():
ucd_path = sys.argv[3]
parse_ucd(ucd_path)
all_emoji, default_emoji, equivalent_emoji = compute_expected_emoji()
check_emoji_compat(all_emoji, equivalent_emoji)
check_emoji_not_compat(all_emoji, equivalent_emoji)
check_emoji_coverage(all_emoji, equivalent_emoji)
check_emoji_defaults(default_emoji)