On 01/04/09 19:31, Spiros Bousbouras wrote:
>
> On 1 Apr, 17:15, Tim Chase<[email protected]> wrote:
>> Spiros Bousbouras wrote:
>>> function! Add_line()
>>> call append(0 , "This is a new line")
>>> endfunction
>>> imap<F1> <ESC>:call Add_line()<CR>
>>
>>> The above script gets executed and now I am in Insert mode. I
>>> type a few characters and then press<F1>. As expected "This is
>>> a new line" is added at the top of the buffer. Now if I press 'u'
>>> it removes the new line *and* the characters I had typed right
>>> before I pressed<F1>. Is there a way to modify the function
>>> (preferably) or the mapping so that when I press<F1> a new undo
>>> block is created so that when I press 'u' only the modification
>>> by Add_line() gets undone and not what came before I pressed
>>> <F1> ?
>>
>> You should be able to insert an undo-break, curtly described at
>>
>> :help i_CTRL-G_u
>
> Not only curtly described but also it doesn't appear in the "undo"
> part of the documentation where I was looking for an answer to
> my problem.
Yes, quite easy to miss. I search for it a few hours ago and didn't find
it. I guess the reason for that is that it's a rather late addition. In
Vim 6 we would have used other means.
Note that |i_CTRL-O| also breaks undo, so
imap <F1> <C-O>:call Add_line()<CR>
would be good enough (and Vim 6 compatible). In some other
circumstances, under Vim 6 we would have used
imap <Space> <Space><Left><Right>
imap <CR> <CR><Up><Down>
etc.
>
>> so you'd do something like
>>
>> imap<f1> <c-g>u<esc>:call Add_line()<cr>
>
> This works , thank you. Anyone knows if it's possible to achieve
> the same effect from within a script ?
Best regards,
Tony.
--
The best way to make a fire with two sticks is to make sure one of them
is a match.
-- Will Rogers
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