Vim auto complete custom list

scriptingvim

I had these two questions about this function

" how do I load a file into a list here?
" set some variable  

func! CustomComplete() 


" and then read the variable here so that b:list = a \n split file ?
let b:list = ["spoogle","spangle","frizzle"]
let b:matches = []

The intent is that I can just hit a hot key and auto complete a list from the file system.

inoremap <F5> <C-R>=CustomComplete()<CR>

" how do I load a file into a list?
func! CustomComplete()

echom 'select word under cursor'
let b:word = expand('<cword>')
echom '->'.b:word.'<-'
echom 'save position'
let b:position = col('.')
echom '->'.b:position.'<-'
normal e
normal l
echom 'move to end of word'

" and then read the list here?
let b:list = ["spoogle","spangle","frizzle"]
let b:matches = []


echom 'begin checking for completion'
for item in b:list
echom 'checking '
echom '->'.item.'<-'
  if(match(item,'^'.b:word)==0)
  echom 'adding to matches'
  echom '->'.item.'<-'
  call add(b:matches,item)
  endif
endfor
call complete(b:position, b:matches)
return ''
    endfunc

Best Answer

You can retrieve the filenames via glob(), like this, which offers all text files in your home directory for completion:

inoremap <F5> <C-R>=ListFiles()<CR>

func! ListFiles()
    let files = map(split(glob('~/*.txt'), "\n"), 'fnamemodify(v:val, ":t")')
    call complete(col('.'), files)
    return ''
endfunc

To strip off the path, I used fnamemodify(), which I map()'ed over the list.

Related Solutions

Auto indent / format code for Vim

To indent the whole file automatically:

gg
=G

Explained:

gg - go to beginning of the file
G - go to end of the file
= - indent

Vim custom pop up menu

  inoremap <F5> <C-R>=ListMonths()<CR>

    func! ListMonths()
      call complete(col('.'), ['January', 'February', 'March',
            \ 'April', 'May', 'June', 'July', 'August', 'September',
            \ 'October', 'November', 'December'])
      return ''
    endfunc

Found it! Tucked away in that Grimoire they are trying to tell us are docs =)

======================= My final script is something like

inoremap <F5> <C-R>=CustomComplete()<CR>

        func! CustomComplete()
                echom 'move to start of last word'
                normal b
                echom 'select word under cursor'
                let b:word = expand('<cword>')
                echom '->'.b:word.'<-'
                echom 'save position'
                let b:position = col('.')
                echom '->'.b:position.'<-'
                normal e
                normal l
                echom 'move to end of word'     

                let b:list = ["spoogle","spangle","frizzle"]
                let b:matches = []


                echom 'begin checking for completion'
                for item in b:list
                echom 'checking '
                echom '->'.item.'<-'      
                        if(match(item,'^'.b:word)==0)
                        echom 'adding to matches'
                        echom '->'.item.'<-'      
                        call add(b:matches,item)
                        endif
                endfor
                call complete(b:position, b:matches)
                return ''
        endfunc

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