From f133af7120e28f3d8bda4d4e14b3bfd477b46426 Mon Sep 17 00:00:00 2001 From: A Frederick Christensen Date: Sat, 17 May 2025 21:59:37 -0500 Subject: [PATCH] Add support for touchscreen input devices and send the appropriate events to clients --- dwl.c | 158 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 158 insertions(+) diff --git a/dwl.c b/dwl.c index 4816159..3a378f9 100644 --- a/dwl.c +++ b/dwl.c @@ -51,6 +51,7 @@ #include #include #include +#include #include #include #include @@ -161,6 +162,12 @@ typedef struct { struct wl_listener destroy; } KeyboardGroup; +typedef struct TouchGroup { + struct wl_list link; + struct wlr_touch *touch; + Monitor *m; +} TouchGroup; + typedef struct { /* Must keep this field first */ unsigned int type; /* LayerShell */ @@ -268,7 +275,9 @@ static void createnotify(struct wl_listener *listener, void *data); static void createpointer(struct wlr_pointer *pointer); static void createpointerconstraint(struct wl_listener *listener, void *data); static void createpopup(struct wl_listener *listener, void *data); +static void createtouch(struct wlr_touch *touch); static void cursorconstrain(struct wlr_pointer_constraint_v1 *constraint); +static void createtouch(struct wlr_touch *touch); static void cursorframe(struct wl_listener *listener, void *data); static void cursorwarptohint(void); static void destroydecoration(struct wl_listener *listener, void *data); @@ -338,6 +347,10 @@ static void togglefloating(const Arg *arg); static void togglefullscreen(const Arg *arg); static void toggletag(const Arg *arg); static void toggleview(const Arg *arg); +static void touchdown(struct wl_listener *listener, void *data); +static void touchup(struct wl_listener *listener, void *data); +static void touchframe(struct wl_listener *listener, void *data); +static void touchmotion(struct wl_listener *listener, void *data); static void unlocksession(struct wl_listener *listener, void *data); static void unmaplayersurfacenotify(struct wl_listener *listener, void *data); static void unmapnotify(struct wl_listener *listener, void *data); @@ -405,6 +418,7 @@ static struct wlr_output_layout *output_layout; static struct wlr_box sgeom; static struct wl_list mons; static Monitor *selmon; +static struct wl_list touches; /* global event handlers */ static struct wl_listener cursor_axis = {.notify = axisnotify}; @@ -434,6 +448,10 @@ static struct wl_listener request_set_sel = {.notify = setsel}; static struct wl_listener request_set_cursor_shape = {.notify = setcursorshape}; static struct wl_listener request_start_drag = {.notify = requeststartdrag}; static struct wl_listener start_drag = {.notify = startdrag}; +static struct wl_listener touch_down = {.notify = touchdown}; +static struct wl_listener touch_frame = {.notify = touchframe}; +static struct wl_listener touch_motion = {.notify = touchmotion}; +static struct wl_listener touch_up = {.notify = touchup}; static struct wl_listener new_session_lock = {.notify = locksession}; #ifdef XWAYLAND @@ -778,6 +796,10 @@ cleanuplisteners(void) wl_list_remove(&request_set_cursor_shape.link); wl_list_remove(&request_start_drag.link); wl_list_remove(&start_drag.link); + wl_list_remove(&touch_down.link); + wl_list_remove(&touch_frame.link); + wl_list_remove(&touch_motion.link); + wl_list_remove(&touch_up.link); wl_list_remove(&new_session_lock.link); #ifdef XWAYLAND wl_list_remove(&new_xwayland_surface.link); @@ -1196,6 +1218,16 @@ createpopup(struct wl_listener *listener, void *data) LISTEN_STATIC(&popup->base->surface->events.commit, commitpopup); } +void +createtouch(struct wlr_touch *wlr_touch) +{ + TouchGroup *touch = ecalloc(1, sizeof(TouchGroup)); + + touch->touch = wlr_touch; + wl_list_insert(&touches, &touch->link); + wlr_cursor_attach_input_device(cursor, &wlr_touch->base); +} + void cursorconstrain(struct wlr_pointer_constraint_v1 *constraint) { @@ -1587,6 +1619,9 @@ inputdevice(struct wl_listener *listener, void *data) case WLR_INPUT_DEVICE_POINTER: createpointer(wlr_pointer_from_input_device(device)); break; + case WLR_INPUT_DEVICE_TOUCH: + createtouch(wlr_touch_from_input_device(device)); + break; default: /* TODO handle other input device types */ break; @@ -1599,6 +1634,8 @@ inputdevice(struct wl_listener *listener, void *data) caps = WL_SEAT_CAPABILITY_POINTER; if (!wl_list_empty(&kb_group->wlr_group->devices)) caps |= WL_SEAT_CAPABILITY_KEYBOARD; + if (!wl_list_empty(&touches)) + caps |= WL_SEAT_CAPABILITY_TOUCH; wlr_seat_set_capabilities(seat, caps); } @@ -2610,6 +2647,13 @@ setup(void) wl_signal_add(&cursor->events.axis, &cursor_axis); wl_signal_add(&cursor->events.frame, &cursor_frame); + wl_list_init(&touches); + + wl_signal_add(&cursor->events.touch_down, &touch_down); + wl_signal_add(&cursor->events.touch_frame, &touch_frame); + wl_signal_add(&cursor->events.touch_motion, &touch_motion); + wl_signal_add(&cursor->events.touch_up, &touch_up); + cursor_shape_mgr = wlr_cursor_shape_manager_v1_create(dpy, 1); wl_signal_add(&cursor_shape_mgr->events.request_set_shape, &request_set_cursor_shape); @@ -2782,6 +2826,120 @@ toggleview(const Arg *arg) printstatus(); } +void +touchdown(struct wl_listener *listener, void *data) +{ + struct wlr_touch_down_event *event = data; + double lx, ly; + double sx, sy; + struct wlr_surface *surface; + Client *c = NULL; + uint32_t serial = 0; + Monitor *m; + + wlr_idle_notifier_v1_notify_activity(idle_notifier, seat); + + // Map the input to the appropriate output, to ensure that rotation is + // handled. + wl_list_for_each(m, &mons, link) { + if (m == NULL || m->wlr_output == NULL) { + continue; + } + if (event->touch->output_name != NULL && 0 != strcmp(event->touch->output_name, m->wlr_output->name)) { + continue; + } + + wlr_cursor_map_input_to_output(cursor, &event->touch->base, m->wlr_output); + } + + wlr_cursor_absolute_to_layout_coords(cursor, &event->touch->base, event->x, event->y, &lx, &ly); + + /* Find the client under the pointer and send the event along. */ + xytonode(lx, ly, &surface, &c, NULL, &sx, &sy); + if (sloppyfocus) + focusclient(c, 0); + + if (surface != NULL) { + serial = wlr_seat_touch_notify_down(seat, surface, event->time_msec, event->touch_id, sx, sy); + } + + if (serial && wlr_seat_touch_num_points(seat) == 1) { + /* Emulate a mouse click if the touch event wasn't handled */ + struct wlr_pointer_button_event *button_event = data; + struct wlr_pointer_motion_absolute_event *motion_event = data; + double dx, dy; + + wlr_cursor_absolute_to_layout_coords(cursor, &motion_event->pointer->base, motion_event->x, motion_event->y, &lx, &ly); + wlr_cursor_warp_closest(cursor, &motion_event->pointer->base, lx, ly); + dx = lx - cursor->x; + dy = ly - cursor->y; + motionnotify(motion_event->time_msec, &motion_event->pointer->base, dx, dy, dx, dy); + + button_event->button = BTN_LEFT; + button_event->state = WL_POINTER_BUTTON_STATE_PRESSED; + buttonpress(listener, button_event); + } +} + +void +touchup(struct wl_listener *listener, void *data) +{ + struct wlr_touch_up_event *event = data; + + if (!wlr_seat_touch_get_point(seat, event->touch_id)) { + return; + } + + if (wlr_seat_touch_num_points(seat) == 1) { + struct wlr_pointer_button_event *button_event = data; + + button_event->button = BTN_LEFT; + button_event->state = WL_POINTER_BUTTON_STATE_RELEASED; + buttonpress(listener, button_event); + } + + wlr_seat_touch_notify_up(seat, event->time_msec, event->touch_id); + wlr_idle_notifier_v1_notify_activity(idle_notifier, seat); +} + +void +touchframe(struct wl_listener *listener, void *data) +{ + wlr_seat_touch_notify_frame(seat); + wlr_idle_notifier_v1_notify_activity(idle_notifier, seat); +} + +void +touchmotion(struct wl_listener *listener, void *data) +{ + struct wlr_touch_motion_event *event = data; + double lx, ly; + double sx, sy; + struct wlr_surface *surface; + Client *c = NULL; + + if (!wlr_seat_touch_get_point(seat, event->touch_id)) { + return; + } + + wlr_cursor_absolute_to_layout_coords(cursor, &event->touch->base, event->x, event->y, &lx, &ly); + xytonode(lx, ly, &surface, &c, NULL, &sx, &sy); + + if (c != NULL && surface != NULL) { + if (sloppyfocus) + focusclient(c, 0); + wlr_seat_touch_point_focus(seat, surface, event->time_msec, event->touch_id, sx, sy); + } else { + if (sloppyfocus) + focusclient(NULL, 0); + wlr_seat_touch_point_clear_focus(seat, event->time_msec, event->touch_id); + } + wlr_seat_touch_notify_motion(seat, event->time_msec, event->touch_id, sx, sy); + + wlr_idle_notifier_v1_notify_activity(idle_notifier, seat); +} + + void unlocksession(struct wl_listener *listener, void *data) { -- 2.49.0