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More robustification. 

svn path=/trunk/netsurf/; revision=12678
This commit is contained in:
Michael Drake 2011-08-30 18:13:23 +00:00
parent 14a724c62b
commit 525bf15f73
1 changed files with 12 additions and 5 deletions
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17
desktop/scrollbar.c
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@ -412,8 +412,9 @@ void scrollbar_set(struct scrollbar *s, int value, bool bar_pos)
else
s->bar_pos = value;
s->offset = ((s->full_size - s->visible_size) * (s->bar_pos)) /
(well_length - s->bar_len);
s->offset = ((well_length - s->bar_len) < 1) ? 0 :
(((s->full_size - s->visible_size) *
s->bar_pos) / (well_length - s->bar_len));
} else {
if (value > s->full_size - s->visible_size)
@ -421,7 +422,8 @@ void scrollbar_set(struct scrollbar *s, int value, bool bar_pos)
else
s->offset = value;
s->bar_pos = (well_length * s->offset) / s->full_size;
s->bar_pos = (s->full_size < 1) ? 0 :
((well_length * s->offset) / s->full_size);
}
msg.scrollbar = s;
@ -478,8 +480,13 @@ void scrollbar_set_extents(struct scrollbar *s, int length,
well_length = s->length - 2 * SCROLLBAR_WIDTH;
s->bar_len = (well_length * s->visible_size) / s->full_size;
s->bar_pos = (well_length * s->offset) / s->full_size;
if (s->full_size < 1) {
s->bar_len = well_length;
s->bar_pos = 0;
} else {
s->bar_len = (well_length * s->visible_size) / s->full_size;
s->bar_pos = (well_length * s->offset) / s->full_size;
}
}