[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.

include/backend/libinput.h

@@ -55,6 +55,11 @@ void handle_pointer_button(struct libinput_event *event,
 void handle_pointer_axis(struct libinput_event *event,
 		struct libinput_device *device);
 
+struct wlr_switch *create_libinput_switch(
+		struct libinput_device *device);
+void handle_switch_toggle(struct libinput_event *event,
+		struct libinput_device *device);
+
 struct wlr_touch *create_libinput_touch(
 		struct libinput_device *device);
 void handle_touch_down(struct libinput_event *event,

include/rootston/config.h

@@ -3,6 +3,7 @@
 
 #include <xf86drmMode.h>
 #include <wlr/types/wlr_input_device.h>
+#include <wlr/types/wlr_switch.h>
 #include <wlr/types/wlr_output_layout.h>
 
 #define ROOTS_CONFIG_DEFAULT_SEAT_NAME "seat0"
@@ -65,6 +66,14 @@ struct roots_cursor_config {
 	struct wl_list link;
 };
 
+struct roots_switch_config {
+	enum wlr_switch_type switch_type;
+	enum wlr_switch_state switch_state;
+	bool run_on_toggle;
+	char *command;
+	struct wl_list link;
+};
+
 struct roots_config {
 	bool xwayland;
 	bool xwayland_lazy;
@@ -74,6 +83,7 @@ struct roots_config {
 	struct wl_list bindings;
 	struct wl_list keyboards;
 	struct wl_list cursors;
+	struct wl_list switches;
 
 	char *config_path;
 	char *startup_cmd;

include/rootston/seat.h

@@ -32,6 +32,7 @@ struct roots_seat {
 
 	struct wl_list keyboards;
 	struct wl_list pointers;
+	struct wl_list switches;
 	struct wl_list touch;
 	struct wl_list tablets;
 	struct wl_list tablet_pads;
@@ -74,6 +75,15 @@ struct roots_pointer {
 	struct wl_list link;
 };
 
+struct roots_switch {
+	struct roots_seat *seat;
+	struct wlr_input_device *device;
+	struct wl_listener device_destroy;
+
+	struct wl_listener toggle;
+	struct wl_list link;
+};
+
 struct roots_touch {
 	struct roots_seat *seat;
 	struct wlr_input_device *device;

include/wlr/interfaces/meson.build

@@ -3,6 +3,7 @@ install_headers(
 	'wlr_keyboard.h',
 	'wlr_output.h',
 	'wlr_pointer.h',
+	'wlr_switch.h',
 	'wlr_tablet_pad.h',
 	'wlr_tablet_tool.h',
 	'wlr_touch.h',

include/wlr/interfaces/wlr_switch.h

@@ -0,0 +1,22 @@
+/*
+ * This an unstable interface of wlroots. No guarantees are made regarding the
+ * future consistency of this API.
+ */
+#ifndef WLR_USE_UNSTABLE
+#error "Add -DWLR_USE_UNSTABLE to enable unstable wlroots features"
+#endif
+
+#ifndef WLR_INTERFACES_WLR_SWITCH_H
+#define WLR_INTERFACES_WLR_SWITCH_H
+
+#include <wlr/types/wlr_switch.h>
+
+struct wlr_switch_impl {
+	void (*destroy)(struct wlr_switch *lid_switch);
+};
+
+void wlr_switch_init(struct wlr_switch *lid_switch,
+		struct wlr_switch_impl *impl);
+void wlr_switch_destroy(struct wlr_switch *lid_switch);
+
+#endif

include/wlr/types/meson.build

@@ -32,6 +32,7 @@ install_headers(
 	'wlr_seat.h',
 	'wlr_server_decoration.h',
 	'wlr_surface.h',
+	'wlr_switch.h',
 	'wlr_tablet_pad.h',
 	'wlr_tablet_tool.h',
 	'wlr_tablet_v2.h',

include/wlr/types/wlr_input_device.h

@@ -20,6 +20,7 @@ enum wlr_input_device_type {
 	WLR_INPUT_DEVICE_TOUCH,
 	WLR_INPUT_DEVICE_TABLET_TOOL,
 	WLR_INPUT_DEVICE_TABLET_PAD,
+	WLR_INPUT_DEVICE_SWITCH,
 };
 
 /* Note: these are circular dependencies */
@@ -28,6 +29,7 @@ enum wlr_input_device_type {
 #include <wlr/types/wlr_touch.h>
 #include <wlr/types/wlr_tablet_tool.h>
 #include <wlr/types/wlr_tablet_pad.h>
+#include <wlr/types/wlr_switch.h>
 
 struct wlr_input_device_impl;
 
@@ -46,6 +48,7 @@ struct wlr_input_device {
 		void *_device;
 		struct wlr_keyboard *keyboard;
 		struct wlr_pointer *pointer;
+		struct wlr_switch *lid_switch;
 		struct wlr_touch *touch;
 		struct wlr_tablet *tablet;
 		struct wlr_tablet_pad *tablet_pad;

include/wlr/types/wlr_switch.h

@@ -0,0 +1,46 @@
+/*
+ * This an unstable interface of wlroots. No guarantees are made regarding the
+ * future consistency of this API.
+ */
+#ifndef WLR_USE_UNSTABLE
+#error "Add -DWLR_USE_UNSTABLE to enable unstable wlroots features"
+#endif
+
+#ifndef WLR_TYPES_WLR_SWITCH_H
+#define WLR_TYPES_WLR_SWITCH_H
+
+#include <stdint.h>
+#include <wayland-server.h>
+#include <wlr/types/wlr_input_device.h>
+#include <wlr/types/wlr_list.h>
+
+struct wlr_switch_impl;
+
+struct wlr_switch {
+	struct wlr_switch_impl *impl;
+
+	struct {
+		struct wl_signal toggle;
+	} events;
+
+	void *data;
+};
+
+enum wlr_switch_type {
+	WLR_SWITCH_TYPE_LID = 1,
+	WLR_SWITCH_TYPE_TABLET_MODE,
+};
+
+enum wlr_switch_state {
+	WLR_SWITCH_STATE_OFF = 0,
+	WLR_SWITCH_STATE_ON = 1,
+};
+
+struct wlr_event_switch_toggle {
+	struct wlr_input_device *device;
+	uint32_t time_msec;
+	enum wlr_switch_type switch_type;
+	enum wlr_switch_state switch_state;
+};
+
+#endif