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seat/pointer: rework sending axis events 

This commit fixes:
- sending discrete scrolling events to multiple pointer resources
- sending events to clients which don't support wl_pointer.axis_discrete
This commit is contained in:
Kirill Primak 2022-07-18 15:58:56 +03:00 committed by Simon Ser
parent 7b5e890e61
commit 7298c42139
1 changed files with 42 additions and 31 deletions
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73
types/seat/wlr_seat_pointer.c
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@ -279,10 +279,17 @@ static bool should_reset_value120_accumulators(int32_t current, int32_t last) {
static void update_value120_accumulators(struct wlr_seat_client *client,
enum wlr_axis_orientation orientation,
double value, int32_t value_discrete) {
double value, int32_t value_discrete,
double *low_res_value, int32_t *low_res_value_discrete) {
if (value_discrete == 0) {
// Continuous scrolling has no effect on accumulators
return;
}
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;
@ -290,33 +297,17 @@ static void update_value120_accumulators(struct wlr_seat_client *client,
*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;
// Compute low resolution event values for older clients and reset
// the accumulators if needed
*low_res_value_discrete = *acc_discrete / WLR_POINTER_AXIS_DISCRETE_STEP;
if (*low_res_value_discrete == 0) {
*low_res_value = 0;
} else {
*acc_discrete -= *low_res_value_discrete * WLR_POINTER_AXIS_DISCRETE_STEP;
*low_res_value = *acc_axis;
*acc_axis = 0;
}
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) {
wl_pointer_send_axis_value120(resource, orientation, value_discrete);
wl_pointer_send_axis(resource, time, orientation,
wl_fixed_from_double(value));
}
void wlr_seat_pointer_send_axis(struct wlr_seat *wlr_seat, uint32_t time,
@ -336,7 +327,10 @@ 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);
double low_res_value;
int32_t low_res_value_discrete;
update_value120_accumulators(client, orientation, value, value_discrete,
&low_res_value, &low_res_value_discrete);
struct wl_resource *resource;
wl_resource_for_each(resource, &client->pointers) {
@ -346,19 +340,36 @@ void wlr_seat_pointer_send_axis(struct wlr_seat *wlr_seat, uint32_t time,
uint32_t version = wl_resource_get_version(resource);
if (version < WL_POINTER_AXIS_VALUE120_SINCE_VERSION &&
value_discrete != 0 && low_res_value_discrete == 0) {
// The client doesn't support high resolution discrete scrolling
// and we haven't accumulated enough wheel clicks for a single
// low resolution event. Don't send anything.
continue;
}
if (send_source && version >= WL_POINTER_AXIS_SOURCE_SINCE_VERSION) {
wl_pointer_send_axis_source(resource, source);
}
if (value) {
if (value_discrete) {
if (version >= WL_POINTER_AXIS_VALUE120_SINCE_VERSION) {
send_axis_value120(resource, time, orientation, value,
// High resolution discrete scrolling
wl_pointer_send_axis_value120(resource, orientation,
value_discrete);
} else if (version >= WL_POINTER_AXIS_DISCRETE_SINCE_VERSION) {
send_axis_discrete(client, resource, time, orientation,
value, value_discrete);
wl_pointer_send_axis(resource, time, orientation,
wl_fixed_from_double(value));
} else {
// Low resolution discrete scrolling
if (version >= WL_POINTER_AXIS_DISCRETE_SINCE_VERSION) {
wl_pointer_send_axis_discrete(resource, orientation,
low_res_value_discrete);
}
wl_pointer_send_axis(resource, time, orientation,
wl_fixed_from_double(low_res_value));
}
} else {
// Continuous scrolling
wl_pointer_send_axis(resource, time, orientation,
wl_fixed_from_double(value));
}