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patch 9.1.1341: cannot define completion triggers

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Problem:  Cannot define completion triggers and act upon it
Solution: add the new option 'isexpand' and add the complete_match()
          function to return the completion matches according to the
          'isexpand' setting (glepnir)

Currently, completion trigger position is determined solely by the
'iskeyword' pattern (\k\+$), which causes issues when users need
different completion behaviors - such as triggering after '/' for
comments or '.' for methods. Modifying 'iskeyword' to include these
characters has undesirable side effects on other Vim functionality that
relies on keyword definitions.

Introduce a new buffer-local option 'isexpand' that allows specifying
different completion triggers and add the complete_match() function that
finds the appropriate start column for completion based on these
triggers, scanning backwards from cursor position.

This separation of concerns allows customized completion behavior
without affecting iskeyword-dependent features. The option's
buffer-local nature enables per-filetype completion triggers.

closes: #16716

Signed-off-by: glepnir <glephunter@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
glepnir
2025-04-24 21:48:35 +02:00
committed by Christian Brabandt
parent 32f49738d1
commit bcd5995b40
20 changed files with 363 additions and 17 deletions
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4
runtime/optwin.vim
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@ -1,7 +1,7 @@
" These commands create the option window.
"
" Maintainer: The Vim Project <https://github.com/vim/vim>
" Last Change: 2025 Apr 07
" Last Change: 2025 Apr 24
" Former Maintainer: Bram Moolenaar <Bram@vim.org>
" If there already is an option window, jump to that one.
@ -1254,6 +1254,8 @@ call <SID>AddOption("isfname", gettext("specifies the characters in a file name"
call <SID>OptionG("isf", &isf)
call <SID>AddOption("isident", gettext("specifies the characters in an identifier"))
call <SID>OptionG("isi", &isi)
call <SID>AddOption("isexpand", gettext("defines trigger strings for complete_match()"))
call append("$", "\t" .. s:local_to_buffer)
call <SID>AddOption("iskeyword", gettext("specifies the characters in a keyword"))
call append("$", "\t" .. s:local_to_buffer)
call <SID>OptionL("isk")