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touchpad: extract some bits of thumb detection into helper functions

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No functional changes

Extracted from Matt Mayfield's thumb detection patches.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Peter Hutterer 2019-06-20 10:37:37 +10:00
parent 93a754c41c
commit 47d8f05d3b
1 changed files with 35 additions and 11 deletions
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46
src/evdev-mt-touchpad-thumb.c
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@ -68,6 +68,39 @@ tp_thumb_reset(struct tp_dispatch *tp, struct tp_touch *t)
t->thumb.state = THUMB_STATE_MAYBE;
}
static bool
tp_thumb_in_exclusion_area(const struct tp_dispatch *tp,
const struct tp_touch *t,
uint64_t time)
{
return (t->point.y > tp->thumb.lower_thumb_line &&
tp->scroll.method != LIBINPUT_CONFIG_SCROLL_EDGE &&
t->thumb.first_touch_time + THUMB_MOVE_TIMEOUT < time);
}
static bool
tp_thumb_detect_pressure_size(const struct tp_dispatch *tp,
const struct tp_touch *t,
uint64_t time)
{
bool is_thumb = false;
if (tp->thumb.use_pressure &&
t->pressure > tp->thumb.pressure_threshold &&
tp_thumb_in_exclusion_area(tp, t, time)) {
is_thumb = true;
}
if (tp->thumb.use_size &&
(t->major > tp->thumb.size_threshold) &&
(t->minor < (tp->thumb.size_threshold * 0.6))) {
is_thumb = true;
}
return is_thumb;
}
void
tp_thumb_detect(struct tp_dispatch *tp, struct tp_touch *t, uint64_t time)
{
@ -128,18 +161,9 @@ tp_thumb_detect(struct tp_dispatch *tp, struct tp_touch *t, uint64_t time)
* A finger that remains at the very bottom of the touchpad becomes
* a thumb.
*/
if (tp->thumb.use_pressure &&
t->pressure > tp->thumb.pressure_threshold) {
if (tp_thumb_detect_pressure_size(tp, t, time) ||
tp_thumb_in_exclusion_area(tp, t, time))
tp_thumb_set_state(tp, t, THUMB_STATE_YES);
} else if (tp->thumb.use_size &&
(t->major > tp->thumb.size_threshold) &&
(t->minor < (tp->thumb.size_threshold * 0.6))) {
tp_thumb_set_state(tp, t, THUMB_STATE_YES);
} else if (t->point.y > tp->thumb.lower_thumb_line &&
tp->scroll.method != LIBINPUT_CONFIG_SCROLL_EDGE &&
t->thumb.first_touch_time + THUMB_MOVE_TIMEOUT < time) {
tp_thumb_set_state(tp, t, THUMB_STATE_YES);
}
/* now what? we marked it as thumb, so:
*