mirrors/wlroots
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/wlroots/wlroots.git synced 2025-11-26 06:59:52 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

seat: support low-resolution clients

Browse source 
When the client doesn't support high-resolution scroll, accumulate
deltas until we can notify a discrete event.

Some mice have a free spinning wheel, making possible to lock the wheel
when the accumulator value is not 0. To avoid synchronization issues
between the mouse wheel and the accumulators, store the last delta and
when the scroll direction changes, reset the accumulator.
This commit is contained in:
José Expósito 2022-03-27 19:07:25 +02:00
parent 40dc5121aa
commit add44b3e2e
2 changed files with 59 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

48
types/seat/wlr_seat_pointer.c
View file

@ -269,6 +269,48 @@ uint32_t wlr_seat_pointer_send_button(struct wlr_seat *wlr_seat, uint32_t time,
return serial;
}
static bool should_reset_value120_accumulators(int32_t current, int32_t last) {
if (last == 0) {
return true;
}
return (current < 0 && last > 0) || (current > 0 && last < 0);
}
static void update_value120_accumulators(struct wlr_seat_client *client,
enum wlr_axis_orientation orientation,
double value, int32_t value_discrete) {
int32_t *acc_discrete = &client->value120.acc_discrete[orientation];
int32_t *last_discrete = &client->value120.last_discrete[orientation];
double *acc_axis = &client->value120.acc_axis[orientation];
if (should_reset_value120_accumulators(value_discrete, *last_discrete)) {
*acc_discrete = 0;
*acc_axis = 0;
}
*acc_discrete += value_discrete;
*last_discrete = value_discrete;
*acc_axis += value;
}
static void send_axis_discrete(struct wlr_seat_client *client,
struct wl_resource *resource, uint32_t time,
enum wlr_axis_orientation orientation, double value,
int32_t value_discrete) {
int32_t *acc_discrete = &client->value120.acc_discrete[orientation];
double *acc_axis = &client->value120.acc_axis[orientation];
if (abs(*acc_discrete) < WLR_POINTER_AXIS_DISCRETE_STEP) {
return;
}
wl_pointer_send_axis_discrete(resource, orientation,
*acc_discrete / WLR_POINTER_AXIS_DISCRETE_STEP);
wl_pointer_send_axis(resource, time, orientation,
wl_fixed_from_double(*acc_axis));
*acc_discrete %= WLR_POINTER_AXIS_DISCRETE_STEP;
*acc_axis = 0;
}
static void send_axis_value120(struct wl_resource *resource, uint32_t time,
enum wlr_axis_orientation orientation, double value,
int32_t value_discrete) {
@ -294,6 +336,8 @@ void wlr_seat_pointer_send_axis(struct wlr_seat *wlr_seat, uint32_t time,
send_source = true;
}
update_value120_accumulators(client, orientation, value, value_discrete);
struct wl_resource *resource;
wl_resource_for_each(resource, &client->pointers) {
if (wlr_seat_client_from_pointer_resource(resource) == NULL) {
@ -311,8 +355,8 @@ void wlr_seat_pointer_send_axis(struct wlr_seat *wlr_seat, uint32_t time,
send_axis_value120(resource, time, orientation, value,
value_discrete);
} else if (version >= WL_POINTER_AXIS_DISCRETE_SINCE_VERSION) {
wl_pointer_send_axis_discrete(resource, orientation,
value_discrete / WLR_POINTER_AXIS_DISCRETE_STEP);
send_axis_discrete(client, resource, time, orientation,
value, value_discrete);
}
} else {
wl_pointer_send_axis(resource, time, orientation,