On Sat, 24 Nov 2012, James McCoy wrote:
On Sat, Nov 24, 2012 at 01:17:13PM -0500, Benjamin R. Haskell wrote:
As far as I can tell, the t_SI and t_EI sequences¹ don't have non-Vim
equivalents in either termcap or terminfo. Is that accurate? Were
they just "made up" out of necessity?
Yes. As noted at the top of the ":help t_SI" paragraph:
Added by Vim (there are no standard codes for these):
Woops. Jumped directly to *t_SI* and assumed I was in the big list of
termcap entries. Didn't help that *t_EI* pointed to
*termcap-cursor-shape*, which made it seem like an actual termcap entry.
If it's not accurate, does someone have a link to a termcap or
terminfo reference that includes those two?
http://invisible-island.net/xterm/ctlseqs/ctlseqs.html has information
on the sequences necessary to control this behavior with xterm. For
example,
" Switch to underline on insert
let &t_SI="\<Esc>[4 q"
" Back to block when leaving
let &t_EI="\<Esc>[2 q"
Thanks. That's actually what I was hoping to find by tracing back
through t_SI/t_EI: anything close to a "standard" set-cursor-style
sequence. (The Xterm Control Sequence reference calls it DECSCUSR, from
the VT520. I'm adding it to simple-terminal from st.suckless.org)
E.g. in Konsole (needs to be in .vimrc, since updates don't seem to
take effect):
Setting it interactively works for me when running in xterm. I'm not
sure why it wouldn't work, since Vim sends this every time it
enters/leaves insert mode.
Well, crap. Also PEBKAC. Looking at the source, term_cursor_shape
short-circuits:
if (!full_screen || *T_CSI == NUL || *T_CEI == NUL)
return;
When testing interactively, I was only setting t_SI.
Sorry for (all) the noise. But thanks for finding the actual sequence I
was looking for.
--
Best,
Ben
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