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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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runtime/lua/vim/_meta/options.lua generated
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@@ -1829,9 +1829,12 @@ vim.go.ead = vim.go.eadirection
--- When on all Unicode emoji characters are considered to be full width.
--- This excludes "text emoji" characters, which are normally displayed as
--- single width. Unfortunately there is no good specification for this
--- and it has been determined on trial-and-error basis. Use the
--- `setcellwidths()` function to change the behavior.
--- single width. However, such "text emoji" are treated as full-width
--- emoji if they are followed by the U+FE0F variant selector.
---
--- Unfortunately there is no good specification for this and it has been
--- determined on trial-and-error basis. Use the `setcellwidths()`
--- function to change the behavior.
---
--- @type boolean
vim.o.emoji = true