Introduce a hint to only slide file if needed. - catpoint - Catpoint simple presenting software.
(HTM) git clone git://bitreich.org/catpoint/ git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65d7roiv6bfj7d652fid.onion/catpoint/
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---
(DIR) commit 68ef54b661d4e28bb74d67b1bdf81d997abb08db
(DIR) parent cd4fd87b2fc9d10ac71b55d9b1ea503fdad037b0
(HTM) Author: Christoph Lohmann <20h@r-36.net>
Date: Mon, 28 Dec 2020 15:08:19 +0100
Introduce a hint to only slide file if needed.
Diffstat:
M catpoint.c | 20 ++++++++++++++++++--
1 file changed, 18 insertions(+), 2 deletions(-)
---
(DIR) diff --git a/catpoint.c b/catpoint.c
@@ -17,6 +17,8 @@
char *currentslidep, **slidefiles; /* the slides */
int nslides, currentslide, currentslidelen, exitstatus = 1;
+volatile sig_atomic_t slidechanged = 1;
+
void
unloadcurrentslide(void)
{
@@ -64,6 +66,11 @@ reloadcurrentslide(int sig)
if (raise(SIGWINCH) < 0)
err(1, "raise");
}
+
+ /*
+ * Keep this out of SIGHUP, in case this is used somewhere else.
+ */
+ slidechanged = 1;
}
void
@@ -112,8 +119,11 @@ main(int argc, char *argv[])
curs_set(FALSE); /* hide cursor */
show:
- /* display slide */
- loadcurrentslide(slidefiles, currentslide);
+ /* display slide if changed */
+ if (slidechanged) {
+ slidechanged = 0;
+ loadcurrentslide(slidefiles, currentslide);
+ }
clear();
refresh();
printw("%.*s", currentslidelen, currentslidep);
@@ -135,6 +145,7 @@ again:
case KEY_DOWN:
case KEY_NPAGE:
if (currentslide < nslides - 1) {
+ slidechanged = 1;
currentslide++;
goto show;
}
@@ -147,6 +158,7 @@ again:
case KEY_UP:
case KEY_PPAGE:
if (currentslide > 0) {
+ slidechanged = 1;
currentslide--;
goto show;
}
@@ -157,11 +169,15 @@ again:
case 'u':
case KEY_BEG:
case KEY_HOME:
+ if (currentslide != 0)
+ slidechanged = 1;
currentslide = 0;
goto show;
/* last */
case 'i':
case KEY_END:
+ if (currentslide != (nslides - 1))
+ slidechanged = 1;
currentslide = nslides - 1;
goto show;
/* reload */