On 09/29/2011 08:15 AM, Christian Brabandt wrote:
On Thu, September 29, 2011 1:52 pm, AK wrote:
On 09/29/2011 01:58 AM, Benjamin R. Haskell wrote:
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:
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*$'
return "\<tab>"
else
call CloseMenu()
return TriggerSnippet()
endif
endfun
ino<expr> <tab> DoTab()
I get 'E523: not allowed here' in TriggerSnippet. I tried :set secure ,
but that did not help.
I think what happens is, that one of your functions triggers an
action, that is not allowed inside an expr-mapping. If you need to do
something like this, you need to have the functions return the
commands, that will do that.
See :h :map-<expr>
and look at the third paragraph.
regards,
Christian
Ok, I think I'm getting there: I've added the check to the
top of TriggerSnippet:
if getline('.') =~ '^\s*$'
" return "\<tab>"
call feedkeys("\<tab>", 'n') | return ''
endif
Now the issue is only that when I go to a new line by pressing
enter, first tab I press is 'eaten'. Nothing happens at all.
Subsequent tabs work fine. If I press 'a' key at the end of
an existing empty line, tab also works fine, i.e. the first
tab does not get 'eaten'.
The same behaviour occurs if I uncomment the 2nd line in
code I pasted.
If I understand right, when a new line is created, it's indent
is 'virtual', and that seems to cause this problem. I still
don't understand why, though, since tab should not be affected
by indent being virtual or not.. I may be completely off track
here..
-ak
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