On 2014-02-17, Christian Brabandt wrote:
> On So, 16 Feb 2014, Gary Johnson wrote:
>
> > I have a plugin that needs to track the line number of the cursor in
> > order to display some information in the status line. The
> > CursorHold event works fine for this except when a buffer is first
> > opened, as when opening a quickfix error file with -q. I thought
> > that I could use the BufWinEnter event to grab the initial line
> > number in this case, but it appears to be triggered before the
> > quickfix procedure moves the cursor.
> >
> > This behavior can be demonstrated as follows. The source file
> > main.c contains an error at line 5.
> >
> > #include <stdio.h>
> >
> > main(int argc, char *argv[])
> > {
> > exit(0);
> > }
> >
> > When an error file is generated and opened with Vim's -q option, the
> > line number at the time of the BufWinEnter event is 1. I would
> > think it would be 5, the line number that the cursor is on when the
> > buffer is displayed.
> >
> > $ make main > make.out 2>&1
> > $ vim -N -u NONE -i NONE --cmd 'au BufWinEnter * let a=line(".")' -c
> > 'let b=line(".")' -q make.out
> > :echo a b
> > 1 5
> >
> > Is this a bug? ":help BufWinEnter" says it is triggered "After a
> > buffer is displayed in a window." It appears to be triggered before
> > the buffer is displayed.
>
> I think, what you are seeing is the effect of --cmd which means its
> arguments will be executed early. In your case when the first empty
> buffer is entered and before the errorfile is read in.
Yes, --cmd does execute its arguments early, "before processing any
vimrc file", but I am using it to define an autocommand. It's the
timing of the triggering of the autocommand that I think is wrong,
or at least that I don't understand.
Regards,
Gary
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