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vim9script
# Vim completion script
# Language: Vim script
# Maintainer: Maxim Kim <habamax@gmail.com>
# Last Change: 2025-10-15
#
# Usage:
# setlocal omnifunc=vimcomplete#Complete
#
# Simple complete function for Vim script
var trigger: string = ""
var prefix: string = ""
def GetTrigger(line: string): list<any>
var result = ""
var result_len = 0
if line =~ '->\k*$'
result = 'function'
elseif line =~ '\v%(^|\s+)\&\k*$'
result = 'option'
elseif line =~ '\vse%[t]\s+(\k+\s+)*no\k*$'
result = 'nooption'
result_len = -2
elseif line =~ '[\[(]\s*$'
result = 'expression'
elseif line =~ '[lvgsb]:\k*$'
result = 'var'
result_len = 2
elseif line !~ '^\s*$'
result = getcompletiontype(line) ?? 'cmdline'
endif
return [result, result_len]
enddef
export def Complete(findstart: number, base: string): any
if findstart > 0
prefix = ""
var line = getline('.')->strpart(0, col('.') - 1)
var keyword = line->matchstr('\k\+$')
var stx = synstack(line('.'), col('.') - 1)->map('synIDattr(v:val, "name")')->join()
if stx =~? 'Comment' || (stx =~ 'String' && stx !~ 'vimStringInterpolationExpr')
return -2
endif
var trigger_len: number = 0
[trigger, trigger_len] = GetTrigger(line)
if keyword->empty() && trigger->empty()
return -2
endif
prefix = line
return line->len() - keyword->len() - trigger_len
endif
var items = []
if trigger == 'function'
items = getcompletion(base, 'function')
->mapnew((_, v) => ({word: v, kind: 'v', menu: 'Function', dup: 0}))
elseif trigger == 'option'
items = getcompletion(base, 'option')
->mapnew((_, v) => ({word: v, kind: 'v', menu: 'Option', dup: 0}))
elseif trigger == 'nooption'
items = getcompletion(base[2 : ], 'option')
->mapnew((_, v) => ({word: v, kind: 'v', menu: 'Option', dup: 0}))
elseif trigger == 'var'
items = getcompletion(base, 'var')
->mapnew((_, v) => ({word: v, kind: 'v', menu: 'Variable', dup: 0}))
elseif trigger == 'expression'
items = getcompletion(base, 'expression')
->mapnew((_, v) => ({word: v, kind: 'v', menu: 'Expression', dup: 0}))
elseif trigger == 'command'
var commands = getcompletion(base, 'command')
->mapnew((_, v) => ({word: v, kind: 'v', menu: 'Command', dup: 0}))
var functions = getcompletion(base, 'function')
->mapnew((_, v) => ({word: v, kind: 'v', menu: 'Function', dup: 0}))
items = commands + functions
else
try
# :! and :term completion is very slow on Windows and WSL, disable it there.
if !((has("win32") || has("win32unix") || exists("$WSLENV")) && getcompletiontype(prefix) == 'shellcmd')
items = getcompletion(prefix, 'cmdline')
->mapnew((_, v) => ({word: v->matchstr('\k\+'), kind: 'v', dup: 0}))
endif
catch /E220/
endtry
if empty(items) && !empty(base)
items = getcompletion(base, 'expression')
->mapnew((_, v) => ({word: v, kind: 'v', menu: 'Expression', dup: 0}))
endif
endif
return items->empty() ? v:none : items
enddef
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