From 81810896c3034d609ed1bf93e1e04641f9ddf818 Mon Sep 17 00:00:00 2001 From: Micah N Gorrell Date: Fri, 9 Feb 2024 17:08:20 -0700 Subject: [PATCH] Add support for touch screen input devices, and send the appropriate events to clients --- dwl.c | 149 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 149 insertions(+) diff --git a/dwl.c b/dwl.c index fa76db2..6bff6cd 100644 --- a/dwl.c +++ b/dwl.c @@ -45,6 +45,7 @@ #include #include #include +#include #include #include #include @@ -158,6 +159,12 @@ typedef struct { struct wl_listener key; } KeyboardGroup; +typedef struct TouchGroup { + struct wl_list link; + struct wlr_touch *touch; + Monitor *m; +} TouchGroup; + typedef struct { /* Must keep these three elements in this order */ unsigned int type; /* LayerShell */ @@ -255,6 +262,7 @@ static void createlocksurface(struct wl_listener *listener, void *data); static void createmon(struct wl_listener *listener, void *data); static void createnotify(struct wl_listener *listener, void *data); static void createpointer(struct wlr_pointer *pointer); +static void createtouch(struct wlr_touch *touch); static void cursorframe(struct wl_listener *listener, void *data); static void destroydecoration(struct wl_listener *listener, void *data); static void destroydragicon(struct wl_listener *listener, void *data); @@ -321,6 +329,10 @@ 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); @@ -387,6 +399,7 @@ 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; #ifdef XWAYLAND static void activatex11(struct wl_listener *listener, void *data); @@ -1015,6 +1028,16 @@ createpointer(struct wlr_pointer *pointer) wlr_cursor_attach_input_device(cursor, &pointer->base); } +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 cursorframe(struct wl_listener *listener, void *data) { @@ -1344,6 +1367,9 @@ 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; @@ -1356,6 +1382,8 @@ 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); } @@ -2325,6 +2353,13 @@ setup(void) LISTEN_STATIC(&cursor->events.axis, axisnotify); LISTEN_STATIC(&cursor->events.frame, cursorframe); + wl_list_init(&touches); + + LISTEN_STATIC(&cursor->events.touch_down, touchdown); + LISTEN_STATIC(&cursor->events.touch_frame, touchframe); + LISTEN_STATIC(&cursor->events.touch_motion, touchmotion); + LISTEN_STATIC(&cursor->events.touch_up, touchup); + cursor_shape_mgr = wlr_cursor_shape_manager_v1_create(dpy, 1); LISTEN_STATIC(&cursor_shape_mgr->events.request_set_shape, setcursorshape); @@ -2541,6 +2576,120 @@ 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); + // fprintf(stderr, "touch_down at %lf, %lf\n", lx, ly); + + 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; + +#ifdef POINTERCONSTRAINTS + struct wlr_pointer_motion_absolute_event *event = data; + double lx, ly, dx, dy; + + wlr_cursor_absolute_to_layout_coords(cursor, &event->pointer->base, event->x, event->y, &lx, &ly); + wlr_cursor_warp_closest(cursor, &event->pointer->base, lx, ly); + dx = lx - cursor->x; + dy = ly - cursor->y; + motionnotify(event->time_msec, &event->pointer->base, dx, dy, dx, dy); +#else + motionabsolute(listener, data); +#endif + + button_event->button = BTN_LEFT; + button_event->state = WLR_BUTTON_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 = WLR_BUTTON_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) { + wlr_seat_touch_point_focus(seat, surface, event->time_msec, event->touch_id, sx, sy); + wlr_seat_touch_notify_motion(seat, event->time_msec, event->touch_id, sx, sy); + } else { + wlr_seat_touch_point_clear_focus(seat, event->time_msec, event->touch_id); + } + + wlr_idle_notifier_v1_notify_activity(idle_notifier, seat); +} + + void unlocksession(struct wl_listener *listener, void *data) { -- 2.43.0