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Return the wheel scroll value instead of just the fraction

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This is prep work for the hi-res work but right now, no real functional
changes. It does however fix a bug where we used the vertial scroll dist for
the horizontal wheel as well.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Peter Hutterer
2019-01-21 13:19:11 +10:00
parent 347c78387e
commit d13ab268bd
1 changed files with 12 additions and 14 deletions
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26
src/xf86libinput.c
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@@ -1566,9 +1566,9 @@ xf86libinput_handle_key(InputInfoPtr pInfo, struct libinput_event_keyboard *even
* compatible clients.
*/
static inline double
get_scroll_fraction(struct xf86libinput *driver_data,
struct libinput_event_pointer *event,
enum libinput_pointer_axis axis)
get_wheel_scroll_value(struct xf86libinput *driver_data,
struct libinput_event_pointer *event,
enum libinput_pointer_axis axis)
{
struct scroll_axis *s;
double f;
@@ -1586,18 +1586,19 @@ get_scroll_fraction(struct xf86libinput *driver_data,
return 0.0;
}
if (s->fraction != 0.0)
return s->fraction;
/* Calculate the angle per single scroll event */
angle = libinput_event_pointer_get_axis_value(event, axis);
discrete = libinput_event_pointer_get_axis_value_discrete(event, axis);
if (s->fraction != 0.0)
goto out;
/* Calculate the angle per single scroll event */
angle /= discrete;
/* We only do magic for click angles smaller than 10 degrees */
if (angle >= 10) {
s->fraction = 1.0;
return 1.0;
goto out;
}
/* Figure out something that gets close to 15 degrees (the general
@@ -1610,7 +1611,8 @@ get_scroll_fraction(struct xf86libinput *driver_data,
s->fraction = f;
return f;
out:
return s->dist/s->fraction * discrete;
}
static inline bool
@@ -1627,11 +1629,7 @@ calculate_axis_value(struct xf86libinput *driver_data,
source = libinput_event_pointer_get_axis_source(event);
if (source == LIBINPUT_POINTER_AXIS_SOURCE_WHEEL) {
double scroll_fraction;
value = libinput_event_pointer_get_axis_value_discrete(event, axis);
scroll_fraction = get_scroll_fraction(driver_data, event, axis);
value *= driver_data->scroll.v.dist/scroll_fraction;
value = get_wheel_scroll_value(driver_data, event, axis);
} else {
value = libinput_event_pointer_get_axis_value(event, axis);
}