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feat(mbyte): support extended grapheme clusters including more emoji

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Use the grapheme break algorithm from utf8proc to support grapheme
clusters from recent unicode versions.

Handle variant selector VS16 turning some codepoints into double-width
emoji. This means we need to use ptr2cells rather than char2cells when
possible.
This commit is contained in:
bfredl
2024-08-08 10:42:08 +02:00
parent 4353996d0f
commit cfdf68a7ac
34 changed files with 657 additions and 221 deletions
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2
src/nvim/api/extmark.c
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@@ -571,7 +571,7 @@ Integer nvim_buf_set_extmark(Buffer buffer, Integer ns_id, Integer line, Integer
String c = opts->conceal;
if (c.size > 0) {
int ch;
hl.conceal_char = utfc_ptr2schar_len(c.data, (int)c.size, &ch);
hl.conceal_char = utfc_ptr2schar(c.data, &ch);
if (!hl.conceal_char || !vim_isprintc(ch)) {
api_set_error(err, kErrorTypeValidation, "conceal char has to be printable");
goto error;