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top: lessen overhead when 'bottom window' isn't active 

In the commits referenced below special code was added
to make the bottom window sticky and fix the bug after
'Cap_nl_clreos' was traded for the 'Cap_clr_eol' loop.

However, there's always major overhead associated with
interacting with a terminal. So we'll only abandon the
single 'Cap_nl_clreos' putp in favor of repeated calls
with 'Cap_clr_eol' when a bottom window isn't present.

Reference(s):
. May, 2022 - bottom window batch bug fix
commit 793f3e85ae
. May, 2022 - bottom window made sticky
commit 0f2a755b0b

Signed-off-by: Jim Warner <james.warner@comcast.net>
This commit is contained in:
Jim Warner 2023-01-11 00:00:00 -06:00 committed by Craig Small
parent 548c6a05ba
commit 28f44729da
1 changed files with 10 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
src/top/top.c
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@ -105,6 +105,7 @@ static int Screen_cols, Screen_rows, Max_lines;
/* These 'SCREEN_ROWS', 'BOT_ and 'Bot_' guys are used
in managing the special separate bottom 'window' ... */
#define SCREEN_ROWS ( Screen_rows - Bot_rsvd )
#define BOT_PRESENT ( Bot_what > 0 )
#define BOT_ITEMMAX 10 // Bot_item array's max size
#define BOT_MSGSMAX 10 // total entries for Msg_tab
#define BOT_UNFOCUS -1 // tab focus not established
@ -5669,7 +5670,7 @@ static void keys_global (int ch) {
bot_item_toggle(EU_CGR, N_fmt(X_BOT_ctlgrp_fmt), BOT_SEP_SLS);
break;
case kbd_CtrlI:
if (Bot_what) {
if (BOT_PRESENT) {
++Bot_indx;
if (Bot_indx > Bot_focus_func(NULL, NULL))
Bot_indx = BOT_UNFOCUS;
@ -5719,7 +5720,7 @@ static void keys_global (int ch) {
bot_item_toggle(EU_SGN, N_fmt(X_BOT_supgrp_fmt), BOT_SEP_CMA);
break;
case kbd_BTAB:
if (Bot_what) {
if (BOT_PRESENT) {
--Bot_indx;
num = Bot_focus_func(NULL, NULL);
if (Bot_indx <= BOT_UNFOCUS)
@ -7317,9 +7318,13 @@ static void frame_make (void) {
/* clear to end-of-screen - critical if last window is 'idleps off'
(main loop must iterate such that we're always called before sleep) */
if (!Batch && scrlins < Max_lines) {
for (i = scrlins + Msg_row + 1; i < SCREEN_ROWS; i++) {
putp(tg2(0, i));
putp(Cap_clr_eol);
if (!BOT_PRESENT)
putp(Cap_nl_clreos);
else {
for (i = scrlins + Msg_row + 1; i < SCREEN_ROWS; i++) {
putp(tg2(0, i));
putp(Cap_clr_eol);
}
}
PSU_CLREOS(Pseudo_row);
}