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top: tweak scroll coordinates msg handling (again)

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An earlier commit improved the scroll coordinates
message performance by offloading most of the work
to those occasions when column headers were rebuilt.

The only remaining per-frame costs were the addition
of some terminfo escapes and the Frame_maxtask count.

This commit further reduces those per-frame costs to
the absolute minimum.

Reference:
commit fbfaa868ba

Signed-off-by: Jim Warner <james.warner@comcast.net>
This commit is contained in:
Jim Warner 2012-10-22 22:22:22 -05:00 committed by Craig Small
parent 0163abb48b
commit 99010db097
1 changed files with 10 additions and 14 deletions
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24
top/top.c
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@ -695,10 +695,7 @@ static int show_pmt (const char *str) {
/*
* Show a special coordinate message, in support of scrolling */
static inline void show_scroll (void) {
char tmp[SMLBUFSIZ];
snprintf(tmp, sizeof(tmp), Scroll_fmts, Frame_maxtask);
PUTT("%s%s %.*s%s", tg2(0, Msg_row), Caps_off, Screen_cols - 2, tmp, Cap_clr_eol);
PUTT(Scroll_fmts, tg2(0, Msg_row), Frame_maxtask);
putp(tg2(0, Msg_row));
} // end: show_scroll
@ -795,11 +792,9 @@ static void show_special (int interact, const char *glob) {
/*
* Create a nearly complete scroll coordinates message, but still
* technically a format string since we're missing total tasks. */
* a format string since we'll be missing a tgoto and total tasks. */
static void updt_scroll_msg (void) {
#ifndef SCROLLVAR_NO
char tmp[SMLBUFSIZ];
#endif
char tmp1[SMLBUFSIZ], tmp2[SMLBUFSIZ];
int totpflgs = Curwin->totpflgs;
int begpflgs = Curwin->begpflg + 1;
@ -811,14 +806,15 @@ static void updt_scroll_msg (void) {
#endif
if (1 > totpflgs) totpflgs = 1;
if (1 > begpflgs) begpflgs = 1;
snprintf(Scroll_fmts, sizeof(Scroll_fmts)
, N_fmt(SCROLL_coord_fmt)
, Curwin->begtask + 1
, begpflgs, totpflgs);
snprintf(tmp1, sizeof(tmp1)
, N_fmt(SCROLL_coord_fmt), Curwin->begtask + 1, begpflgs, totpflgs);
strcpy(tmp2, tmp1);
#ifndef SCROLLVAR_NO
snprintf(tmp, sizeof(tmp), Curwin->varcolbeg ? " + %d" : "", Curwin->varcolbeg);
scat (Scroll_fmts, tmp);
if (Curwin->varcolbeg)
snprintf(tmp2, sizeof(tmp2), "%s + %d", tmp1, Curwin->varcolbeg);
#endif
snprintf(Scroll_fmts, sizeof(Scroll_fmts)
, "%%s%s %.*s%s", Caps_off, Screen_cols - 3, tmp2, Cap_clr_eol);
} // end: updt_scroll_msg
/*###### Low Level Memory/Keyboard support #############################*/