Re: Insert a tab or call a function

On Wed, 28 Sep 2011, AK wrote:

> Hi, I'm trying to write a small function that is called when I press
> tab key and checks if current line is empty; if it is, it should
> insert a tab, and if not, it should call two other functions. Here's
> the example of what I came up with, which does not work right:
>
> function! DoTab()
> if match(getline('.'), '^\s*$') != -1
> call feedkeys("\<tab>") | return ''
> else
> call CloseMenu()
> call feedkeys("\<c-r>=TriggerSnippet()\<cr>") | return ''
> endif
> endfu
> ino <silent> <tab> <c-o>:call DoTab()<CR>
>
> CloseMenu is another function I have that closes a popup menu if it's
> open, TriggerSnippet is a snipmate function that expands current
> snippet.

Wanting to either insert something or run another function is a good
case for <expr> mappings. It depends a bit on how TriggerSnippet works,
the following might be all you need:

fun! DoTab()
if getline('.') =~ '^\s*$'
return "\<tab>"
else
call CloseMenu()
return TriggerSnippet()
endif
endfun
ino <expr> <tab> DoTab()

--
Best,
Ben

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