Initialize keyboards from libinput

backend/CMakeLists.txt

@@ -15,6 +15,7 @@ add_library(wlr-backend
     drm/drm.c
 
     libinput/backend.c
+    libinput/events.c
 
     backend.c
     egl.c

backend/backend.c

@@ -19,14 +19,10 @@ struct wlr_backend *wlr_backend_create(const struct wlr_backend_impl *impl,
 	}
 	backend->state = state;
 	backend->impl = impl;
+	wl_signal_init(&backend->events.input_add);
+	wl_signal_init(&backend->events.input_remove);
 	wl_signal_init(&backend->events.output_add);
 	wl_signal_init(&backend->events.output_remove);
-	wl_signal_init(&backend->events.keyboard_add);
-	wl_signal_init(&backend->events.keyboard_remove);
-	wl_signal_init(&backend->events.pointer_add);
-	wl_signal_init(&backend->events.pointer_remove);
-	wl_signal_init(&backend->events.touch_add);
-	wl_signal_init(&backend->events.touch_remove);
 	return backend;
 }
 

backend/libinput/backend.c

@@ -23,7 +23,7 @@ static const struct libinput_interface libinput_impl = {
 	.close_restricted = wlr_libinput_close_restricted
 };
 
-static int wlr_libinput_handle_event(int fd, uint32_t mask, void *_state) {
+static int wlr_libinput_readable(int fd, uint32_t mask, void *_state) {
 	struct wlr_backend_state *state = _state;
 	if (libinput_dispatch(state->libinput) != 0) {
 		wlr_log(L_ERROR, "Failed to dispatch libinput");
@@ -32,12 +32,7 @@ static int wlr_libinput_handle_event(int fd, uint32_t mask, void *_state) {
 	}
 	struct libinput_event *event;
 	while ((event = libinput_get_event(state->libinput))) {
-		struct libinput *context = libinput_event_get_context(event);
-		struct libinput_device *device = libinput_event_get_device(event);
-		enum libinput_event_type event_type = libinput_event_get_type(event);
-		wlr_log(L_DEBUG, "libinput event: %d", event_type);
-		(void)device; (void)context;
-		// TODO: dispatch event
+		wlr_libinput_event(state, event);
 	}
 	return 0;
 }
@@ -73,7 +68,7 @@ static bool wlr_libinput_backend_init(struct wlr_backend_state *state) {
 	}
 	state->input_event = wl_event_loop_add_fd(event_loop,
 			libinput_get_fd(state->libinput), WL_EVENT_READABLE,
-			wlr_libinput_handle_event, state);
+			wlr_libinput_readable, state);
 	if (!state->input_event) {
 		wlr_log(L_ERROR, "Failed to create input event on event loop");
 		return false;
@@ -112,5 +107,7 @@ struct wlr_backend *wlr_libinput_backend_create(struct wl_display *display,
 	state->udev = udev;
 	state->display = display;
 
+	state->keyboards = list_create();
+
 	return backend;
 }

backend/libinput/events.c

@@ -0,0 +1,100 @@
+#include <stdlib.h>
+#include <assert.h>
+#include <libinput.h>
+#include <wlr/session.h>
+#include <wlr/types.h>
+#include <wlr/common/list.h>
+#include "backend/libinput/backend.h"
+#include "common/log.h"
+#include "types.h"
+
+static void wlr_libinput_keyboard_destroy(struct wlr_keyboard_state *state) {
+	free(state);
+}
+
+static struct wlr_keyboard_impl keyboard_impl = {
+	.destroy = wlr_libinput_keyboard_destroy
+};
+
+static struct wlr_keyboard *wlr_libinput_keyboard_create(
+		struct libinput_device *device) {
+	assert(device);
+	struct wlr_keyboard_state *kbstate =
+		calloc(1, sizeof(struct wlr_keyboard_state));
+	kbstate->handle = device;
+	return wlr_keyboard_create(&keyboard_impl, kbstate);
+}
+
+static void device_added(struct wlr_backend_state *state,
+		struct libinput_device *device) {
+	assert(state && device);
+	/*
+	 * Note: the wlr API exposes only devices with a single capability, because
+	 * that meshes better with how Wayland does things and is a bit simpler.
+	 * However, libinput devices often have multiple capabilities - in such
+	 * cases we have to create several devices.
+	 */
+	int vendor = libinput_device_get_id_vendor(device);
+	int product = libinput_device_get_id_product(device);
+	const char *name = libinput_device_get_name(device);
+	list_t *devices = list_create();
+	wlr_log(L_DEBUG, "Added %s [%d:%d]", name, vendor, product);
+
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_KEYBOARD)) {
+		struct wlr_input_device *wlr_device = wlr_input_device_create(
+			WLR_INPUT_DEVICE_KEYBOARD, name, vendor, product);
+		wlr_device->keyboard = wlr_libinput_keyboard_create(device);
+		wl_signal_emit(&state->backend->events.input_add, wlr_device);
+		list_add(devices, wlr_device);
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_POINTER)) {
+		// TODO
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_TOUCH)) {
+		// TODO
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_TABLET_TOOL)) {
+		// TODO
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_TABLET_PAD)) {
+		// TODO
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_GESTURE)) {
+		// TODO
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_SWITCH)) {
+		// TODO
+	}
+
+	if (devices->length > 0) {
+		libinput_device_set_user_data(device, devices);
+	} else {
+		list_free(devices);
+	}
+}
+
+static void device_removed(struct wlr_backend_state *state,
+		struct libinput_device *device) {
+	wlr_log(L_DEBUG, "libinput device removed");
+	// TODO
+}
+
+void wlr_libinput_event(struct wlr_backend_state *state,
+		struct libinput_event *event) {
+	assert(state && event);
+	struct libinput *context = libinput_event_get_context(event);
+	struct libinput_device *device = libinput_event_get_device(event);
+	enum libinput_event_type event_type = libinput_event_get_type(event);
+	(void)context;
+	switch (event_type) {
+	case LIBINPUT_EVENT_DEVICE_ADDED:
+		device_added(state, device);
+		break;
+	case LIBINPUT_EVENT_DEVICE_REMOVED:
+		device_removed(state, device);
+		break;
+	default:
+		wlr_log(L_DEBUG, "Unknown libinput event %d", event_type);
+		break;
+	}
+}

example/simple.c

@@ -13,16 +13,29 @@ struct state {
 	float color[3];
 	int dec;
 	struct timespec last_frame;
+
+	struct wl_list keyboards;
+	struct wl_listener input_add;
+	struct wl_listener input_remove;
+
 	struct wl_listener output_add;
 	struct wl_listener output_remove;
 	struct wl_list outputs;
 };
 
 struct output_state {
-	struct wl_list link;
-	struct wlr_output *output;
 	struct state *state;
+	struct wlr_output *output;
 	struct wl_listener frame;
+	struct wl_list link;
+};
+
+struct keyboard_state {
+	struct state *state;
+	struct wlr_input_device *device;
+	struct wl_listener key;
+	struct wl_listener mods;
+	struct wl_list link;
 };
 
 void output_frame(struct wl_listener *listener, void *data) {
@@ -84,28 +97,44 @@ void output_remove(struct wl_listener *listener, void *data) {
 	wl_list_remove(&ostate->frame.link);
 }
 
-int timer_done(void *data) {
-	*(bool *)data = true;
-	return 1;
+void input_add(struct wl_listener *listener, void *data) {
+	struct wlr_input_device *device = data;
+	struct state *state = wl_container_of(listener, state, input_add);
+	if (device->type != WLR_INPUT_DEVICE_KEYBOARD) {
+		return;
+	}
+	fprintf(stderr, "Keyboard '%s' (%d:%d) added\n", device->name,
+			device->vendor, device->product);
+	struct keyboard_state *kbstate = calloc(sizeof(struct keyboard_state), 1);
+	kbstate->device = device;
+	wl_list_init(&kbstate->key.link);
+	wl_list_init(&kbstate->mods.link);
+	wl_list_insert(&state->keyboards, &kbstate->link);
 }
 
-int enable_outputs(void *data) {
-	struct state *state = data;
-	struct output_state *ostate;
-	wl_list_for_each(ostate, &state->outputs, link) {
-		struct wlr_output *output = ostate->output;
-		wlr_output_enable(output, true);
+void input_remove(struct wl_listener *listener, void *data) {
+	struct wlr_input_device *device = data;
+	struct state *state = wl_container_of(listener, state, input_add);
+	if (device->type != WLR_INPUT_DEVICE_KEYBOARD) {
+		return;
 	}
-	return 1;
+	struct keyboard_state *kbstate = NULL, *_kbstate;
+	wl_list_for_each(_kbstate, &state->keyboards, link) {
+		if (_kbstate->device == device) {
+			kbstate = kbstate;
+			break;
+		}
+	}
+	if (!kbstate) {
+		return; // We are unfamiliar with this keyboard
+	}
+	wl_list_remove(&kbstate->link);
+	//wl_list_remove(&kbstate->key.link);
+	//wl_list_remove(&kbstate->mods.link);
 }
 
-int disable_outputs(void *data) {
-	struct state *state = data;
-	struct output_state *ostate;
-	wl_list_for_each(ostate, &state->outputs, link) {
-		struct wlr_output *output = ostate->output;
-		wlr_output_enable(output, false);
-	}
+int timer_done(void *data) {
+	*(bool *)data = true;
 	return 1;
 }
 
@@ -113,12 +142,18 @@ int main() {
 	struct state state = {
 		.color = { 1.0, 0.0, 0.0 },
 		.dec = 0,
+		.input_add = { .notify = input_add },
+		.input_remove = { .notify = input_remove },
 		.output_add = { .notify = output_add },
 		.output_remove = { .notify = output_remove }
 	};
 
+	wl_list_init(&state.keyboards);
+	wl_list_init(&state.input_add.link);
+	wl_list_init(&state.input_remove.link);
+
 	wl_list_init(&state.outputs);
-	wl_list_init(&state.output_add.link);
+	wl_list_init(&state.output_remove.link);
 	wl_list_init(&state.output_remove.link);
 	clock_gettime(CLOCK_MONOTONIC, &state.last_frame);
 
@@ -131,6 +166,8 @@ int main() {
 	}
 
 	struct wlr_backend *wlr = wlr_backend_autocreate(display, session);
+	wl_signal_add(&wlr->events.input_add, &state.input_add);
+	wl_signal_add(&wlr->events.input_remove, &state.input_remove);
 	wl_signal_add(&wlr->events.output_add, &state.output_add);
 	wl_signal_add(&wlr->events.output_remove, &state.output_remove);
 	if (!wlr || !wlr_backend_init(wlr)) {
@@ -140,14 +177,8 @@ int main() {
 	bool done = false;
 	struct wl_event_source *timer = wl_event_loop_add_timer(event_loop,
 		timer_done, &done);
-	struct wl_event_source *timer_disable_outputs =
-		wl_event_loop_add_timer(event_loop, disable_outputs, &state);
-	struct wl_event_source *timer_enable_outputs =
-		wl_event_loop_add_timer(event_loop, enable_outputs, &state);
-
-	wl_event_source_timer_update(timer, 20000);
-	wl_event_source_timer_update(timer_disable_outputs, 5000);
-	wl_event_source_timer_update(timer_enable_outputs, 10000);
+
+	wl_event_source_timer_update(timer, 10000);
 
 	while (!done) {
 		wl_event_loop_dispatch(event_loop, 0);

include/backend/libinput/backend.h

@@ -15,10 +15,14 @@ struct wlr_backend_state {
 	struct libinput *libinput;
 	struct wl_event_source *input_event;
 
-	list_t *devices;
+	list_t *keyboards;
 };
 
 void wlr_libinput_event(struct wlr_backend_state *state,
 		struct libinput_event *event);
 
+struct wlr_keyboard_state {
+	struct libinput_device *handle;
+};
+
 #endif

include/types.h

@@ -18,4 +18,25 @@ struct wlr_output *wlr_output_create(struct wlr_output_impl *impl,
 		struct wlr_output_state *state);
 void wlr_output_free(struct wlr_output *output);
 
+struct wlr_keyboard_impl {
+	void (*destroy)(struct wlr_keyboard_state *state);
+};
+
+struct wlr_keyboard *wlr_keyboard_create(struct wlr_keyboard_impl *impl,
+		struct wlr_keyboard_state *state);
+void wlr_keyboard_destroy(struct wlr_keyboard *keyboard);
+
+struct wlr_pointer_impl {
+	void (*destroy)(struct wlr_pointer_state *state);
+};
+
+struct wlr_pointer *wlr_pointer_create(struct wlr_pointer_impl *impl,
+		struct wlr_pointer_state *state);
+void wlr_pointer_destroy(struct wlr_pointer *pointer);
+
+struct wlr_input_device *wlr_input_device_create(
+		enum wlr_input_device_type type, const char *name,
+		int vendor, int product);
+void wlr_input_device_destroy(struct wlr_input_device *dev);
+
 #endif

include/wlr/backend.h

@@ -12,14 +12,10 @@ struct wlr_backend {
 	struct wlr_backend_state *state;
 
 	struct {
+		struct wl_signal input_add;
+		struct wl_signal input_remove;
 		struct wl_signal output_add;
 		struct wl_signal output_remove;
-		struct wl_signal keyboard_add;
-		struct wl_signal keyboard_remove;
-		struct wl_signal pointer_add;
-		struct wl_signal pointer_remove;
-		struct wl_signal touch_add;
-		struct wl_signal touch_remove;
 	} events;
 };
 

include/wlr/types.h

@@ -50,4 +50,97 @@ void wlr_output_destroy(struct wlr_output *output);
 void wlr_output_effective_resolution(struct wlr_output *output,
 		int *width, int *height);
 
+// TODO: keymaps
+
+struct wlr_keyboard_state;
+struct wlr_keyboard_impl;
+
+struct wlr_keyboard {
+	struct wlr_keyboard_state *state;
+	struct wlr_keyboard_impl *impl;
+
+	struct {
+		struct wl_signal key;
+		struct wl_signal mods;
+	} events;
+};
+
+struct wlr_pointer_state;
+struct wlr_pointer_impl;
+
+struct wlr_pointer {
+	struct wlr_pointer_state *state;
+	struct wlr_pointer_impl *impl;
+
+	struct {
+		struct wl_signal motion;
+		struct wl_signal motion_absolute;
+		struct wl_signal button;
+		struct wl_signal axis;
+	} events;
+};
+
+struct wlr_pointer_motion {
+	double delta_x, delta_y;
+};
+
+struct wlr_pointer_motion_absolute {
+	double x_mm, y_mm;
+	double width_mm, height_mm;
+};
+
+enum wlr_button_state {
+	WLR_BUTTON_DEPRESSED,
+	WLR_BUTTON_RELEASED
+};
+
+struct wlr_pointer_button {
+	uint32_t button;
+	enum wlr_button_state state;
+};
+
+enum wlr_axis_source {
+	WLR_AXIS_SOURCE_WHEEL,
+	WLR_AXIS_SOURCE_FINGER,
+	WLR_AXIS_SOURCE_CONTINUOUS,
+	WLR_AXIS_SOURCE_WHEEL_TILT,
+};
+
+enum wlr_axis_orientation {
+	WLR_AXIS_ORIENTATION_VERTICAL,
+	WLR_AXIS_ORIENTATION_HORIZONTAL
+};
+
+struct wlr_pointer_axis {
+	enum wlr_axis_source source;
+	enum wlr_axis_orientation orientation;
+	double delta;
+};
+
+// TODO: touch
+// TODO: tablet & tablet tool
+// TODO: gestures
+// TODO: switch
+
+enum wlr_input_device_type {
+	WLR_INPUT_DEVICE_KEYBOARD,
+	WLR_INPUT_DEVICE_POINTER,
+	WLR_INPUT_DEVICE_TOUCH,
+	WLR_INPUT_DEVICE_TABLET_PEN,
+	WLR_INPUT_DEVICE_TABLET_PAD,
+	WLR_INPUT_DEVICE_GESTURE,
+	WLR_INPUT_DEVICE_SWITCH,
+};
+
+struct wlr_input_device {
+	enum wlr_input_device_type type;
+	int vendor, product;
+	char *name;
+	union {
+		void *_device;
+		struct wlr_keyboard *keyboard;
+		struct wlr_pointer *pointer;
+	};
+};
+
 #endif

types/CMakeLists.txt

@@ -5,6 +5,8 @@ include_directories(
 
 add_library(wlr-types
     wlr_output.c
+    wlr_keyboard.c
+    wlr_input_device.c
 )
 
 target_link_libraries(wlr-types

types/wlr_input_device.c

@@ -0,0 +1,24 @@
+#define _XOPEN_SOURCE 500
+#include <stdlib.h>
+#include <string.h>
+#include <wayland-server.h>
+#include <wlr/types.h>
+#include <wlr/common/list.h>
+#include "types.h"
+
+struct wlr_input_device *wlr_input_device_create(
+		enum wlr_input_device_type type, const char *name,
+		int vendor, int product) {
+	struct wlr_input_device *dev = calloc(1, sizeof(struct wlr_input_device));
+	dev->type = type;
+	dev->name = strdup(name);
+	dev->vendor = vendor;
+	dev->product = product;
+	return dev;
+}
+
+void wlr_input_device_destroy(struct wlr_input_device *dev) {
+	if (!dev) return;
+	free(dev->name);
+	free(dev);
+}

types/wlr_keyboard.c

@@ -0,0 +1,22 @@
+#include <stdlib.h>
+#include <string.h>
+#include <wayland-server.h>
+#include <wlr/types.h>
+#include <wlr/common/list.h>
+#include "types.h"
+
+struct wlr_keyboard *wlr_keyboard_create(struct wlr_keyboard_impl *impl,
+		struct wlr_keyboard_state *state) {
+	struct wlr_keyboard *kb = calloc(1, sizeof(struct wlr_keyboard));
+	kb->impl = impl;
+	kb->state = state;
+	wl_signal_init(&kb->events.key);
+	wl_signal_init(&kb->events.mods);
+	return kb;
+}
+
+void wlr_keyboard_destroy(struct wlr_keyboard *kb) {
+	if (!kb) return;
+	kb->impl->destroy(kb->state);
+	free(kb);
+}