[vim/vim] Add diacritic-insensitive search (#8026)

Rudolf Adamkovič

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Mar 28, 2021, 9:49:50 AM3/28/21

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Is your feature request about something that is currently impossible or hard to do? Please describe the problem.

A clear and concise description of what is hard to do. Ex. It is difficult to [...] when […]

It is difficult to search in/for non-English text because Vim does not understand and ignore diacritics. See, for instance: https://vi.stackexchange.com/questions/7386/ignoring-diacritics-accents-when-searching

Describe the solution you'd like

ignorediacritics a là ignorecase

When set, /kocicka will find kočička, and /kočička will find kocicka.

Describe alternatives you've considered

A clear and concise description of any alternative solutions or features you've considered.

Using equivalence classes, e.g. [[=c=]]. This is impractical.

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Bram Moolenaar

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Mar 28, 2021, 12:36:20 PM3/28/21

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A global option causes problems for plugin writers. We could add something like \c (ignore case) in the pattern itself.

JohnBeckett

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Mar 30, 2021, 12:02:40 AM3/30/21

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If something like ignorediacritics is implemented, please make it work for :sort as well.

grr

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Sep 27, 2021, 5:31:47 PM9/27/21

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I gotten used to other programs support this by default. For reference, Firefox's search in page switched to ignoring diacritics by default about 2 years ago.

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Christian Brabandt

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Sep 28, 2021, 6:35:28 AM9/28/21

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May be this works well for a browser, but in my text editor, I expect /Baum to only match the German word "Baum" (tree) and not the plural form "Bäume" (trees).

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Rodrigo Camacho

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Oct 12, 2021, 4:31:45 PM10/12/21

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Did this ever get treated in one way or another?

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Javier Lopez

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Oct 12, 2021, 5:14:45 PM10/12/21

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May be this works well for a browser, but in my text editor, I expect /Baum to only match the German word "Baum" (tree) and not the plural form "Bäume" (trees).

Some diacritics are just for accents (Spanish áéíóú), and is a common misspelling error which still means the same thing. I'm sure there's tons of other uses/languages

But I agree, being behind a flag like \c would be nice!

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y

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Mar 26, 2022, 2:30:12 PM3/26/22

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I noticed that firefox only ignores diacritcs and not ligatures, so searching for 'ae' won't find 'æ'. I suggest using the unicode confusable mapping for completeness: http://www.unicode.org/Public/security/revision-05/confusables.txt

If there was some discussion here on implementation details, maybe a plugin author could take the first whack at it, so we'd get a proof of concept as well as support for older versions if this feature gets released.