Auto Omnicompletion

Instalation

vim-plug

Plug 'BrandonRoehl/auto-omni'

Vundle.vim

Plugin 'BrandonRoehl/auto-omni'

vim-pathogen

git clone https://github.com/BrandonRoehl/auto-omni.git ~/.vim/bundle/auto-omni

Configuration

This plugin does exactly that.

inspired by AutoComplPop this plugin will just pop open the omni completion menu in standard vim on key press if the omnifunc is set for that filetype

First just add the plugin to your vimrc

filetype plugin on

" Enable omni for all types and auto set it
" [Recomended]
set omnifunc=syntaxcomplete#Complete

" Enable omni completion per file.
autocmd FileType css setlocal omnifunc=csscomplete#CompleteCSS
autocmd FileType html,markdown setlocal omnifunc=htmlcomplete#CompleteTags
autocmd FileType javascript setlocal omnifunc=javascriptcomplete#CompleteJS
autocmd FileType python setlocal omnifunc=pythoncomplete#Complete
autocmd FileType xml setlocal omnifunc=xmlcomplete#CompleteTags

" Then set the how the popup behaves
" this plugin sets the default behavior to
set completeopt=noinsert,menuone
" I suggest leaving the noinsert option set otherwise
" the plugin will always insert the first item in the popup

You can manually set the keys that trigger the completion by default all alpha keys will trigger it

# Default keys
let g:auto_omnicomplete_key =
            \ 'a b c d e f g h i j k l m n o p q r s t u v w x y z ' .
            \ 'A B C D E F G H I J K L M N O P Q R S T U V W X Y Z'

My Setup

set omnifunc=syntaxcomplete#Complete
set completeopt=noinsert,menuone
let g:rubycomplete_buffer_loading=1
let g:rubycomplete_classes_in_global=1
let g:rubycomplete_rails=0
let g:loaded_sql_completion=0
let g:omni_sql_no_default_maps=1