freebsd-dev/contrib/nvi/docs/internals/context
Peter Wemm b8ba871bd9 Import of nvi-1.79, minus a few bits that we dont need (eg: postscript
files, curses, db, regex etc that we already have).  The other glue will
follow shortly.

Obtained from: Keith Bostic <bostic@bostic.com>
1996-11-01 06:45:43 +00:00

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# @(#)context 8.6 (Berkeley) 10/14/94
In historic vi, the previous context mark was always set:
ex address:
any number, <question-mark>, <slash>, <dollar-sign>,
<single-quote>, <backslash>
ex commands: undo, "z.", global, v
vi commands: (, ), {, }, %, [[, ]], ^]
nvi adds the vi command ^T to this list.
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
In historic vi, the previous context mark was set if the
line changed:
vi commands: '<mark>, G, H, L, M, z
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
In historic vi, the previous context mark was set if the
line or column changed:
vi commands: `<mark>, /, ?, N, n
nvi adds the vi command ^A to this list.
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
In historic vi, the previous context mark was set in non-visual
mode for ^R and ^L if the line changed, but I have yet to figure
out how the line could change.