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cursor: add scroll emulation for cursor motion

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Jens Peters 2025-04-25 14:21:30 +02:00 • committed by Hiroaki Yamamoto
parent 829fedb94a
commit 5a1e377f43
1 changed files with 49 additions and 7 deletions
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56
src/input/cursor.c
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@ -4,6 +4,7 @@
#include <linux/input-event-codes.h>
#include <sys/time.h>
#include <time.h>
#include <wlr/backend/libinput.h>
#include <wlr/types/wlr_cursor_shape_v1.h>
#include <wlr/types/wlr_primary_selection.h>
#include <wlr/util/region.h>
@ -832,6 +833,19 @@ preprocess_cursor_motion(struct seat *seat, struct wlr_pointer *pointer,
}
}
static double get_natural_scroll_factor(struct wlr_input_device *wlr_input_device)
{
if (wlr_input_device_is_libinput(wlr_input_device)) {
struct libinput_device *libinput_device =
wlr_libinput_get_device_handle(wlr_input_device);
if (libinput_device_config_scroll_get_natural_scroll_enabled(libinput_device)) {
return -1.0;
}
}
return 1.0;
}
static void
handle_motion(struct wl_listener *listener, void *data)
{
@ -845,14 +859,42 @@ handle_motion(struct wl_listener *listener, void *data)
idle_manager_notify_activity(seat->seat);
cursor_set_visible(seat, /* visible */ true);
wlr_relative_pointer_manager_v1_send_relative_motion(
server->relative_pointer_manager,
seat->seat, (uint64_t)event->time_msec * 1000,
event->delta_x, event->delta_y, event->unaccel_dx,
event->unaccel_dy);
if (seat->cursor_scroll_wheel_emulation) {
uint32_t orientation;
double delta;
if (fabs(event->delta_x) > fabs(event->delta_y)) {
orientation = WL_POINTER_AXIS_HORIZONTAL_SCROLL;
delta = event->delta_x;
} else {
orientation = WL_POINTER_AXIS_VERTICAL_SCROLL;
delta = event->delta_y;
}
preprocess_cursor_motion(seat, event->pointer,
event->time_msec, event->delta_x, event->delta_y);
/*
* arbitrary factor that should give reasonable speed
* with the default configured scroll factor of 1.0
*/
double motion_to_scroll_factor = 0.04;
double scroll_factor = motion_to_scroll_factor *
get_natural_scroll_factor(&event->pointer->base);
/* The delta of a single step for mouse wheel emulation */
double pointer_axis_step = 15.0;
cursor_emulate_axis(seat, &event->pointer->base,
orientation,
pointer_axis_step * scroll_factor * delta, 0,
WL_POINTER_AXIS_SOURCE_CONTINUOUS, event->time_msec);
} else {
wlr_relative_pointer_manager_v1_send_relative_motion(
server->relative_pointer_manager,
seat->seat, (uint64_t)event->time_msec * 1000,
event->delta_x, event->delta_y, event->unaccel_dx,
event->unaccel_dy);
preprocess_cursor_motion(seat, event->pointer,
event->time_msec, event->delta_x, event->delta_y);
}
}
static void