Hi list,
In my quest to get rid of the alternative buffer feature of todays
terminals, I've configured tmux with:
set -g terminal-overrides 'xterm*:smcup@:rmcup@'
set -g alternate-screen off
This basically does everything I want, except that compared to a
non-tmux session (with terminfo settings to remove smcup and rmcup
capabilities) a "clear" overwrites the existing contents of the
terminal. E.g. when I run Vim in tmux, I lose the information on my
screen, whereas outside it isn't. The \E[2J sequence triggers a full
clear screen, and the attached patch changes the behaviour for that
sequence in the tty_cmd_clearscreen function not to overwrite, but
rather add empty lines to make the terminal clean. This is only done
when alternate-screen is set to off, when this behaviour makes sense.
Please consider the attached patch.
--
Fabian Groffen
Gentoo on a different level
# HG changeset patch
# User Fabian Groffen <grob...@gentoo.org>
# Date 1314042382 -7200
# Node ID 1b455a85ed6ca5e6aeea23a7152bffcc902966b3
# Parent 051fdc014dc5bc730e4b0eb380af8b09938dd9b8
tty_cmd_clearscreen: don't overwrite the buffer if alternate-screen=off
If the alternative-screen isn't used, overwriting the buffer contents
loses the information that the user probably wanted to retain (hence no
alternate-screen). Instead, write enough newlines to clear the screen
and reset the cursor, such that we retain all information that was on
the screen before the clear.
For example: having ls output and starting Vim won't overwrite the ls
output, but show the output including the vim invocation.
diff -r 051fdc014dc5 -r 1b455a85ed6c tty.c
--- a/tty.c Mon Aug 22 20:14:55 2011 +0200
+++ b/tty.c Mon Aug 22 21:46:22 2011 +0200
@@ -899,24 +899,32 @@
tty_reset(tty);
- tty_region_pane(tty, ctx, 0, screen_size_y(s) - 1);
- tty_cursor_pane(tty, ctx, 0, 0);
+ if (options_get_number(&wp->window->options, "alternate-screen")) {
+ tty_region_pane(tty, ctx, 0, screen_size_y(s) - 1);
+ tty_cursor_pane(tty, ctx, 0, 0);
- if (wp->xoff == 0 && screen_size_x(s) >= tty->sx &&
- tty_term_has(tty->term, TTYC_EL)) {
- for (i = 0; i < screen_size_y(s); i++) {
- tty_putcode(tty, TTYC_EL);
- if (i != screen_size_y(s) - 1) {
- tty_emulate_repeat(tty, TTYC_CUD, TTYC_CUD1, 1);
- tty->cy++;
+ if (wp->xoff == 0 && screen_size_x(s) >= tty->sx &&
+ tty_term_has(tty->term, TTYC_EL)) {
+ for (i = 0; i < screen_size_y(s); i++) {
+ tty_putcode(tty, TTYC_EL);
+ if (i != screen_size_y(s) - 1) {
+ tty_emulate_repeat(tty, TTYC_CUD,
TTYC_CUD1, 1);
+ tty->cy++;
+ }
+ }
+ } else {
+ for (j = 0; j < screen_size_y(s); j++) {
+ tty_cursor_pane(tty, ctx, 0, j);
+ for (i = 0; i < screen_size_x(s); i++)
+ tty_putc(tty, ' ');
}
}
} else {
- for (j = 0; j < screen_size_y(s); j++) {
- tty_cursor_pane(tty, ctx, 0, j);
- for (i = 0; i < screen_size_x(s); i++)
- tty_putc(tty, ' ');
- }
+ /* make sure we don't overwrite buffer contents, move down */
+ for (j = 0; j < screen_size_y(s); j++)
+ tty_putc(tty, '\n');
+ tty_region_pane(tty, ctx, 0, screen_size_y(s) - 1);
+ tty_cursor_pane(tty, ctx, 0, 0);
}
}
------------------------------------------------------------------------------
uberSVN's rich system and user administration capabilities and model
configuration take the hassle out of deploying and managing Subversion and
the tools developers use with it. Learn more about uberSVN and get a free
download at: http://p.sf.net/sfu/wandisco-dev2dev
_______________________________________________
tmux-users mailing list
tmux-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/tmux-users
