[WIP][DONTMERGE]Add support for libinput_switch input devices

These are used primarily by laptops to signal
the state of the lid (open/closed) and tablet
mode if supported, based on ACPI events.

4 files changed, 78 insertions, 1 deletions

diff --git a/backend/headless/input_device.c b/backend/headless/input_device.c
index ba251dd7..827c6ee4 100644
--- a/backend/headless/input_device.c
+++ b/backend/headless/input_device.c
@@ -6,6 +6,7 @@
 #include <wlr/interfaces/wlr_tablet_pad.h>
 #include <wlr/interfaces/wlr_tablet_tool.h>
 #include <wlr/interfaces/wlr_touch.h>
+#include <wlr/interfaces/wlr_switch.h>
 #include <wlr/util/log.h>
 #include "backend/headless.h"
 #include "util/signal.h"
@@ -76,6 +77,13 @@ struct wlr_input_device *wlr_headless_add_input_device(
 		}
 		wlr_tablet_pad_init(wlr_device->tablet_pad, NULL);
 		break;
+	case WLR_INPUT_DEVICE_SWITCH:
+		wlr_device->lid_switch = calloc(1, sizeof(struct wlr_switch));
+		if (wlr_device->lid_switch == NULL) {
+			wlr_log(WLR_ERROR, "Unable to allocate wlr_switch");
+			goto error;
+		}
+		wlr_switch_init(wlr_device->lid_switch, NULL);
 	}
 
 	wl_list_insert(&backend->input_devices, &wlr_device->link);
diff --git a/backend/libinput/events.c b/backend/libinput/events.c
index 9ce62d6f..a7a6c114 100644
--- a/backend/libinput/events.c
+++ b/backend/libinput/events.c
@@ -169,7 +169,17 @@ static void handle_device_added(struct wlr_libinput_backend *backend,
 	}
 	if (libinput_device_has_capability(
 			libinput_dev, LIBINPUT_DEVICE_CAP_SWITCH)) {
-		// TODO
+		struct wlr_input_device *wlr_dev = allocate_device(backend,
+			libinput_dev, wlr_devices, WLR_INPUT_DEVICE_SWITCH);
+		if (!wlr_dev) {
+			goto fail;
+		}
+		wlr_dev->lid_switch = create_libinput_switch(libinput_dev);
+		if (!wlr_dev->lid_switch) {
+			free(wlr_dev);
+			goto fail;
+		}
+		wlr_signal_emit_safe(&backend->backend.events.new_input, wlr_dev);
 	}
 
 	if (!wl_list_empty(wlr_devices)) {
@@ -274,6 +284,9 @@ void handle_libinput_event(struct wlr_libinput_backend *backend,
 	case LIBINPUT_EVENT_TABLET_PAD_STRIP:
 		handle_tablet_pad_strip(event, libinput_dev);
 		break;
+	case LIBINPUT_EVENT_SWITCH_TOGGLE:
+		handle_switch_toggle(event, libinput_dev);
+		break;
 	default:
 		wlr_log(WLR_DEBUG, "Unknown libinput event %d", event_type);
 		break;
diff --git a/backend/libinput/switch.c b/backend/libinput/switch.c
new file mode 100644
index 00000000..393460b0
--- /dev/null
+++ b/backend/libinput/switch.c
@@ -0,0 +1,55 @@
+#include <assert.h>
+#include <libinput.h>
+#include <stdlib.h>
+#include <wlr/backend/session.h>
+#include <wlr/interfaces/wlr_switch.h>
+#include <wlr/types/wlr_input_device.h>
+#include <wlr/util/log.h>
+#include "backend/libinput.h"
+#include "util/signal.h"
+
+struct wlr_switch *create_libinput_switch(
+		struct libinput_device *libinput_dev) {
+	assert(libinput_dev);
+	struct wlr_switch *wlr_switch = calloc(1, sizeof(struct wlr_switch));
+	if (!wlr_switch) {
+		wlr_log(WLR_ERROR, "Unable to allocate wlr_switch");
+		return NULL;
+	}
+	wlr_switch_init(wlr_switch, NULL);
+	wlr_log(WLR_DEBUG, "Created switch for device %s", libinput_device_get_name(libinput_dev));
+	return wlr_switch;
+}
+
+void handle_switch_toggle(struct libinput_event *event,
+		struct libinput_device *libinput_dev) {
+	struct wlr_input_device *wlr_dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_SWITCH, libinput_dev);
+	if (!wlr_dev) {
+		wlr_log(WLR_DEBUG, "Got a switch event for a device with no switch?");
+		return;
+	}
+	struct libinput_event_switch *sevent = 
+		libinput_event_get_switch_event	(event);
+	struct wlr_event_switch_toggle wlr_event = { 0 };
+	wlr_event.device = wlr_dev;
+	switch (libinput_event_switch_get_switch(sevent)) {
+	case LIBINPUT_SWITCH_LID:
+		wlr_event.switch_type = WLR_SWITCH_TYPE_LID;
+		break;
+	case LIBINPUT_SWITCH_TABLET_MODE:
+		wlr_event.switch_type = WLR_SWITCH_TYPE_TABLET_MODE;
+		break;
+	}
+	switch (libinput_event_switch_get_switch_state(sevent)) {
+	case LIBINPUT_SWITCH_STATE_OFF:
+		wlr_event.switch_state = WLR_SWITCH_STATE_OFF;
+		break;
+	case LIBINPUT_SWITCH_STATE_ON:
+		wlr_event.switch_state = WLR_SWITCH_STATE_ON;
+		break;
+	}
+	wlr_event.time_msec =
+		usec_to_msec(libinput_event_switch_get_time_usec(sevent));
+	wlr_signal_emit_safe(&wlr_dev->lid_switch->events.toggle, &wlr_event);
+}
diff --git a/backend/meson.build b/backend/meson.build
index 03f8ea7d..bf9b4f83 100644
--- a/backend/meson.build
+++ b/backend/meson.build
@@ -15,6 +15,7 @@ backend_files = files(
 	'libinput/events.c',
 	'libinput/keyboard.c',
 	'libinput/pointer.c',
+	'libinput/switch.c',
 	'libinput/tablet_pad.c',
 	'libinput/tablet_tool.c',
 	'libinput/touch.c',