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vim-patch:9.1.1166: command-line auto-completion hard with wildmenu

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Problem:  command-line auto-completion hard with wildmenu
Solution: implement "noselect" wildoption value (Girish Palya)

When `noselect` is present in `wildmode` and 'wildmenu' is enabled, the
completion menu appears without pre-selecting the first item.

This change makes it easier to implement command-line auto-completion,
where the menu dynamically appears as characters are typed, and `<Tab>`
can be used to manually select an item. This can be achieved by
leveraging the `CmdlineChanged` event to insert `wildchar(m)`,
triggering completion menu.

Without this change, auto-completion using the 'wildmenu' mechanism is
not feasible, as it automatically inserts the first match, preventing
dynamic selection.

The following Vimscript snippet demonstrates how to configure
auto-completion using `noselect`:

```vim
vim9script
set wim=noselect:lastused,full wop=pum wcm=<C-@> wmnu
autocmd CmdlineChanged : timer_start(0, function(CmdComplete, [getcmdline()]))

def CmdComplete(cur_cmdline: string, timer: number)
  var [cmdline, curpos] = [getcmdline(), getcmdpos()]
  if cur_cmdline ==# cmdline  # Avoid completing each character in keymaps and pasted text
    && !pumvisible() && curpos == cmdline->len() + 1

    if cmdline[curpos - 2] =~ '[\w*/:]'  # Reduce noise by completing only selected characters
      feedkeys("\<C-@>", "ti")
      set eventignore+=CmdlineChanged  # Suppress redundant completion attempts
      timer_start(0, (_) => {
        getcmdline()->substitute('\%x00$', '', '')->setcmdline()  # Remove <C-@> if no completion items exist
        set eventignore-=CmdlineChanged
      })
    endif
  endif
enddef
```

fixes: vim/vim#16551
closes: vim/vim#16759

2bacc3e5fb

Cherry-pick Wildmode_Tests() change from patch 9.0.0418.

Co-authored-by: Girish Palya <girishji@gmail.com>
Signed-off-by: Tomas Slusny <slusnucky@gmail.com>
This commit is contained in:
Tomas Slusny
2025-03-03 17:51:42 +01:00
committed by zeertzjq
parent 948179cb19
commit 99d688e645
9 changed files with 105 additions and 19 deletions
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17
runtime/lua/vim/_meta/options.lua generated
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@@ -7691,7 +7691,10 @@ vim.go.wmnu = vim.go.wildmenu
--- "lastused" When completing buffer names and more than one buffer
--- matches, sort buffers by time last used (other than
--- the current buffer).
--- When there is only a single match, it is fully completed in all cases.
--- "noselect" Do not pre-select first menu item and start 'wildmenu'
--- if it is enabled.
--- When there is only a single match, it is fully completed in all cases
--- except when "noselect" is present.
---
--- Examples of useful colon-separated values:
--- "longest:full" Like "longest", but also start 'wildmenu' if it is
@@ -7729,7 +7732,17 @@ vim.go.wmnu = vim.go.wildmenu
--- ```vim
--- set wildmode=longest,list
--- ```
--- Complete longest common string, then list alternatives.
--- Complete longest common string, then list alternatives
---
--- ```vim
--- set wildmode=noselect:full
--- ```
--- Display 'wildmenu' without completing, then each full match
---
--- ```vim
--- set wildmode=noselect:lastused,full
--- ```
--- Same as above, but sort buffers by time last used.
--- More info here: `cmdline-completion`.
---
--- @type string