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authorMichael Drake <tlsa@netsurf-browser.org>2011-08-31 13:04:50 +0000
committerMichael Drake <tlsa@netsurf-browser.org>2011-08-31 13:04:50 +0000
commitf878fefeedf4bbe0ef6b2f9b788b5ff1b2ba1f7f (patch)
treed90b4d9b100be10655fea27efd8aae63079d4a53 /desktop/scrollbar.c
parentc35b92acc105b763f9200e0b7c022c2930cc3e1d (diff)
downloadnetsurf-f878fefeedf4bbe0ef6b2f9b788b5ff1b2ba1f7f.tar.gz
netsurf-f878fefeedf4bbe0ef6b2f9b788b5ff1b2ba1f7f.tar.bz2
Optimise out scrollbar action induced redraws with no effect.
svn path=/trunk/netsurf/; revision=12688
Diffstat (limited to 'desktop/scrollbar.c')
-rw-r--r--desktop/scrollbar.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/desktop/scrollbar.c b/desktop/scrollbar.c
index 1c4b46d47..e6fe83c90 100644
--- a/desktop/scrollbar.c
+++ b/desktop/scrollbar.c
@@ -397,6 +397,7 @@ bool scrollbar_redraw(struct scrollbar *s, int x, int y,
void scrollbar_set(struct scrollbar *s, int value, bool bar_pos)
{
int well_length;
+ int old_offset = s->offset;
struct scrollbar_msg_data msg;
if (value < 0)
@@ -426,6 +427,10 @@ void scrollbar_set(struct scrollbar *s, int value, bool bar_pos)
((well_length * s->offset) / s->full_size);
}
+ if (s->offset == old_offset)
+ /* Nothing happened */
+ return;
+
msg.scrollbar = s;
msg.msg = SCROLLBAR_MSG_MOVED;
msg.scroll_offset = s->offset;