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patch 9.1.1742: complete: preinsert does not work well with preinsert

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Problem:  complete: preinsert does not work well with preinsert
Solution: Make "preinsert" completeopt value work with autocompletion
          (Girish Palya)

This change extends Insert mode autocompletion so that 'preinsert' also
works when 'autocomplete' is enabled.

Try: `:set ac cot=preinsert`

See `:help 'cot'` for more details.

closes: #18213

Signed-off-by: Girish Palya <girishji@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Girish Palya
2025-09-08 15:23:29 -04:00
committed by Christian Brabandt
parent 4ed19fd336
commit fa6fd41a94
14 changed files with 364 additions and 50 deletions
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23
runtime/doc/insert.txt
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@ -1,4 +1,4 @@
*insert.txt* For Vim version 9.1. Last change: 2025 Aug 25
*insert.txt* For Vim version 9.1. Last change: 2025 Sep 08
VIM REFERENCE MANUAL by Bram Moolenaar
@ -1150,7 +1150,26 @@ any of them at any time by typing |CTRL-X|, which temporarily suspends
autocompletion. To use |i_CTRL-N| or |i_CTRL-X_CTRL-N| specifically, press
|CTRL-E| first to dismiss the popup menu (see |complete_CTRL-E|).
See also 'autocomplete', 'autocompletetimeout' and 'autocompletedelay'.
*ins-autocompletion-example*
Example setup~
A typical configuration for automatic completion with a popup menu: >
set autocomplete
set complete=.^5,w^5,b^5,u^5
set completeopt=popup
inoremap <silent><expr> <Tab> pumvisible() ? "\<C-n>" : "\<Tab>"
inoremap <silent><expr> <S-Tab> pumvisible() ? "\<C-p>" : "\<S-Tab>"
<
This enables automatic completion with suggestions from the current buffer,
other windows, and listed buffers, displayed in a popup menu. Each source is
limited to 5 candidates. <Tab> and <S-Tab> move through the items when the
menu is visible. Optionally, add "preinsert" to 'completeopt' to insert the
longest common prefix automatically. You can also add other completion
sources to 'complete' as needed.
See also 'autocomplete', 'autocompletedelay' and 'autocompletetimeout'.
For command-line autocompletion, see |cmdline-autocompletion|.
FUNCTIONS FOR FINDING COMPLETIONS *complete-functions*