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X11: make the scrollbar span the full height

This commit is contained in:
Přemysl Eric Janouch 2022-09-03 13:02:47 +02:00
parent 8529f24a46
commit 7e74d1a80a
Signed by: p
GPG Key ID: A0420B94F92B9493
1 changed files with 13 additions and 9 deletions
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22
nncmpp.c
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@ -2014,7 +2014,7 @@ app_layout_header (void)
}
static int
app_visible_items (void)
app_visible_items_height (void)
{
struct widget *list = NULL;
LIST_FOR_EACH (struct widget, w, g.widgets.head)
@ -2024,7 +2024,13 @@ app_visible_items (void)
hard_assert (list != NULL);
// The raw number of items that would have fit on the terminal
return MAX (0, list->height / g.ui_vunit);
return MAX (0, list->height);
}
static int
app_visible_items (void)
{
return app_visible_items_height () / g.ui_vunit;
}
/// Figure out scrollbar appearance. @a s is the minimal slider length as well
@ -2032,7 +2038,7 @@ app_visible_items (void)
struct scrollbar { long length, start; }
app_compute_scrollbar (struct tab *tab, long visible, long s)
{
long top = tab->item_top, total = tab->item_count;
long top = s * tab->item_top, total = s * tab->item_count;
if (total < visible)
return (struct scrollbar) { 0, 0 };
if (visible == 1)
@ -2042,7 +2048,7 @@ app_compute_scrollbar (struct tab *tab, long visible, long s)
// Only be at the top or bottom when the top or bottom item can be seen.
// The algorithm isn't optimal but it's a bitch to get right.
double available_length = s * visible - 2 - s + 1;
double available_length = visible - 2 - s + 1;
double lenf = s + available_length * visible / total, length = 0.;
long offset = 1 + available_length * top / total + modf (lenf, &length);
@ -2050,7 +2056,7 @@ app_compute_scrollbar (struct tab *tab, long visible, long s)
if (top == 0)
return (struct scrollbar) { length, 0 };
if (top + visible >= total)
return (struct scrollbar) { length, s * visible - length };
return (struct scrollbar) { length, visible - length };
return (struct scrollbar) { length, offset };
}
@ -5171,7 +5177,7 @@ tui_render_scrollbar (struct widget *self)
return;
}
struct scrollbar bar = app_compute_scrollbar (tab, visible_items, 8);
struct scrollbar bar = app_compute_scrollbar (tab, visible_items * 8, 8);
bar.length += bar.start;
int start_part = bar.start % 8; bar.start /= 8;
@ -5791,10 +5797,8 @@ x11_render_scrollbar (struct widget *self)
x11_render_padding (self);
struct tab *tab = g.active_tab;
// FIXME: This isn't an integer number in this case.
int visible_items = app_visible_items ();
struct scrollbar bar =
app_compute_scrollbar (tab, visible_items, g.ui_vunit);
app_compute_scrollbar (tab, app_visible_items_height (), g.ui_vunit);
XRenderFillRectangle (g.dpy, PictOpSrc, g.x11_pixmap_picture,
x11_fg_attrs (self->attrs),