Simplify window fraction logic - scroll - scrollbackbuffer program for st
(HTM) git clone git://git.suckless.org/scroll
(DIR) Log
(DIR) Files
(DIR) Refs
(DIR) README
(DIR) LICENSE
---
(DIR) commit 66f97243ff888b8cdcd69b57d3abdaf58a070ec9
(DIR) parent 4ed0bd4aa3382ec3b73693b4379cfa8cc91e0e7e
(HTM) Author: Jochen Sprickerhof <git@jochen.sprickerhof.de>
Date: Sun, 12 Apr 2020 22:53:03 +0200
Simplify window fraction logic
Diffstat:
M scroll.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
---
(DIR) diff --git a/scroll.c b/scroll.c
@@ -296,8 +296,8 @@ scrollup(int n)
int rows = 2;
struct line *scrollend = bottom;
- if (n < 0)
- n = ws.ws_row / (-n) > 0 ? ws.ws_row / (-n) : 1;
+ if (n < 0) /* scroll by fraction of window rows, but at least one line */
+ n = ws.ws_row > (-n) ? ws.ws_row / (-n) : 1;
/* wind back scrollend pointer by one page plus n */
for (; scrollend != NULL && TAILQ_NEXT(scrollend, entries) != NULL &&
@@ -338,8 +338,8 @@ scrolldown(char *buf, size_t size, int n)
if (bottom == NULL || bottom == TAILQ_FIRST(&head))
return;
- if (n < 0)
- n = ws.ws_row / (-n) > 0 ? ws.ws_row / (-n) : 1;
+ if (n < 0) /* scroll by fraction of window rows, but at least one line */
+ n = ws.ws_row > (-n) ? ws.ws_row / (-n) : 1;
bottom = TAILQ_PREV(bottom, tailhead, entries);
/* print n lines */