[vim/vim] runtime(helptoc): FuzzySearch() highlights matched characters at the wrong column for multibyte text (PR #21198)

[VimWei]

Problem: matchfuzzypos() returns match positions as character indices, but
text property col/length are counted in bytes. FuzzySearch()
used "col + 1" and "length: 1", so matched multibyte characters
were split and only their first byte was highlighted.

Solution: Convert character indices to byte offsets with byteidx() and use
the byte length of each matched character.

fixes: #21056

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You can view, comment on, or merge this pull request online at:

  https://github.com/vim/vim/pull/21198

Commit Summary

• 7ece831 runtime(helptoc): FuzzySearch() highlights matched characters at the wrong column for multibyte text

File Changes

(2 files)

• M runtime/pack/dist/opt/helptoc/autoload/helptoc.vim (8)
• M src/testdir/test_plugin_helptoc.vim (31)

Patch Links:

• https://github.com/vim/vim/pull/21198.patch
• https://github.com/vim/vim/pull/21198.diff

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[Christian Brabandt]

chrisbra left a comment (vim/vim#21198)

thanks

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