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backend/libinput: handle high-res scroll events

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On newer versions of libinput, the event LIBINPUT_EVENT_POINTER_AXIS
has been deprecated in favour of LIBINPUT_EVENT_POINTER_SCROLL_WHEEL,
LIBINPUT_EVENT_POINTER_SCROLL_FINGER and
LIBINPUT_EVENT_POINTER_SCROLL_CONTINUOUS.

Where new events are provided by the backend, ignore
LIBINPUT_EVENT_POINTER_AXIS, receive high-resolution scroll events from
libinput and emit the appropiate wlr_pointer signal.
This commit is contained in:
José Expósito 2022-02-25 17:30:42 +01:00
parent 65c436407f
commit c6032d6b1c
3 changed files with 60 additions and 0 deletions
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17
backend/libinput/events.c
View file

@ -176,8 +176,25 @@ void handle_libinput_event(struct wlr_libinput_backend *backend,
handle_pointer_button(event, &dev->pointer);
break;
case LIBINPUT_EVENT_POINTER_AXIS:
#if !LIBINPUT_HAS_SCROLL_VALUE120
/* This event must be ignored in favour of the SCROLL_* events */
handle_pointer_axis(event, &dev->pointer);
#endif
break;
#if LIBINPUT_HAS_SCROLL_VALUE120
case LIBINPUT_EVENT_POINTER_SCROLL_WHEEL:
handle_pointer_axis_value120(event, &dev->pointer,
WLR_AXIS_SOURCE_WHEEL);
break;
case LIBINPUT_EVENT_POINTER_SCROLL_FINGER:
handle_pointer_axis_value120(event, &dev->pointer,
WLR_AXIS_SOURCE_FINGER);
break;
case LIBINPUT_EVENT_POINTER_SCROLL_CONTINUOUS:
handle_pointer_axis_value120(event, &dev->pointer,
WLR_AXIS_SOURCE_CONTINUOUS);
break;
#endif
case LIBINPUT_EVENT_TOUCH_DOWN:
handle_touch_down(event, &dev->touch);
break;

39
backend/libinput/pointer.c
View file

@ -123,6 +123,45 @@ void handle_pointer_axis(struct libinput_event *event,
wlr_signal_emit_safe(&pointer->events.frame, pointer);
}
#if LIBINPUT_HAS_SCROLL_VALUE120
void handle_pointer_axis_value120(struct libinput_event *event,
struct wlr_pointer *pointer, enum wlr_axis_source source) {
struct libinput_event_pointer *pevent =
libinput_event_get_pointer_event(event);
struct wlr_pointer_axis_event wlr_event = { 0 };
wlr_event.pointer = pointer;
wlr_event.time_msec =
usec_to_msec(libinput_event_pointer_get_time_usec(pevent));
wlr_event.source = source;
const enum libinput_pointer_axis axes[] = {
LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL,
LIBINPUT_POINTER_AXIS_SCROLL_HORIZONTAL,
};
for (size_t i = 0; i < sizeof(axes) / sizeof(axes[0]); ++i) {
if (!libinput_event_pointer_has_axis(pevent, axes[i])) {
continue;
}
switch (axes[i]) {
case LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL:
wlr_event.orientation = WLR_AXIS_ORIENTATION_VERTICAL;
break;
case LIBINPUT_POINTER_AXIS_SCROLL_HORIZONTAL:
wlr_event.orientation = WLR_AXIS_ORIENTATION_HORIZONTAL;
break;
}
wlr_event.delta =
libinput_event_pointer_get_scroll_value(pevent, axes[i]);
if (source == WLR_AXIS_SOURCE_WHEEL) {
wlr_event.delta_discrete =
libinput_event_pointer_get_scroll_value_v120(pevent, axes[i]);
}
wlr_signal_emit_safe(&pointer->events.axis, &wlr_event);
}
wlr_signal_emit_safe(&pointer->events.frame, pointer);
}
#endif
void handle_pointer_swipe_begin(struct libinput_event *event,
struct wlr_pointer *pointer) {
struct libinput_event_gesture *gevent =

4
include/backend/libinput.h
View file

@ -70,6 +70,10 @@ void handle_pointer_button(struct libinput_event *event,
struct wlr_pointer *pointer);
void handle_pointer_axis(struct libinput_event *event,
struct wlr_pointer *pointer);
#if LIBINPUT_HAS_SCROLL_VALUE120
void handle_pointer_axis_value120(struct libinput_event *event,
struct wlr_pointer *pointer, enum wlr_axis_source source);
#endif
void handle_pointer_swipe_begin(struct libinput_event *event,
struct wlr_pointer *pointer);
void handle_pointer_swipe_update(struct libinput_event *event,