18 files changed, 533 insertions, 15 deletions

diff --git a/backend/backend.c b/backend/backend.c
index 93d7e0df..23e212b6 100644
--- a/backend/backend.c
+++ b/backend/backend.c
@@ -182,7 +182,3 @@ struct wlr_backend *wlr_backend_autocreate(struct wl_display *display) {
 
 	return backend;
 }
-
-uint32_t usec_to_msec(uint64_t usec) {
-	return (uint32_t)(usec / 1000);
-}
diff --git a/backend/libinput/backend.c b/backend/libinput/backend.c
index 1e7c1ad4..ef33df0a 100644
--- a/backend/libinput/backend.c
+++ b/backend/libinput/backend.c
@@ -191,3 +191,7 @@ struct libinput_device *wlr_libinput_get_device_handle(struct wlr_input_device *
 	struct wlr_libinput_input_device *dev = (struct wlr_libinput_input_device *)_dev;
 	return dev->handle;
 }
+
+uint32_t usec_to_msec(uint64_t usec) {
+	return (uint32_t)(usec / 1000);
+}
diff --git a/examples/idle-inhibit.c b/examples/idle-inhibit.c
index c09e6507..348892ab 100644
--- a/examples/idle-inhibit.c
+++ b/examples/idle-inhibit.c
@@ -55,10 +55,8 @@ static void pointer_handle_button(void *data, struct wl_pointer *pointer, uint32
 			zwp_idle_inhibitor_v1_destroy(idle_inhibitor);
 			idle_inhibitor = NULL;
 		} else {
-			idle_inhibitor =
-				zwp_idle_inhibit_manager_v1_create_inhibitor(
-					idle_inhibit_manager,
-					surface);
+			idle_inhibitor = zwp_idle_inhibit_manager_v1_create_inhibitor(
+					idle_inhibit_manager, surface);
 		}
 	}
 
@@ -140,7 +138,6 @@ static void xdg_toplevel_handle_close(void *data,
 	exit(EXIT_SUCCESS);
 }
 
-
 static const struct xdg_toplevel_listener xdg_toplevel_listener = {
 	.configure = xdg_toplevel_handle_configure,
 	.close = xdg_toplevel_handle_close,
diff --git a/examples/input-inhibitor.c b/examples/input-inhibitor.c
new file mode 100644
index 00000000..25e46c73
--- /dev/null
+++ b/examples/input-inhibitor.c
@@ -0,0 +1,189 @@
+#include <GLES2/gl2.h>
+#include <assert.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <wayland-client.h>
+#include <wayland-egl.h>
+#include <wlr/render/egl.h>
+#include "wlr-input-inhibitor-unstable-v1-client-protocol.h"
+#include "xdg-shell-client-protocol.h"
+
+static int width = 500, height = 300;
+static int keys = 0;
+
+static struct wl_compositor *compositor = NULL;
+static struct wl_seat *seat = NULL;
+static struct xdg_wm_base *wm_base = NULL;
+static struct zwlr_input_inhibit_manager_v1 *input_inhibit_manager = NULL;
+static struct zwlr_input_inhibitor_v1 *input_inhibitor = NULL;
+
+struct wlr_egl egl;
+struct wl_egl_window *egl_window;
+struct wlr_egl_surface *egl_surface;
+
+static void render_frame(void) {
+	eglMakeCurrent(egl.display, egl_surface, egl_surface, egl.context);
+
+	glViewport(0, 0, width, height);
+	if (keys) {
+		glClearColor(1.0, 1.0, 1.0, 1.0);
+	} else {
+		glClearColor(0.8, 0.4, 1.0, 1.0);
+	}
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	eglSwapBuffers(egl.display, egl_surface);
+}
+
+static void xdg_surface_handle_configure(void *data,
+		struct xdg_surface *xdg_surface, uint32_t serial) {
+	xdg_surface_ack_configure(xdg_surface, serial);
+	wl_egl_window_resize(egl_window, width, height, 0, 0);
+	render_frame();
+}
+
+static const struct xdg_surface_listener xdg_surface_listener = {
+	.configure = xdg_surface_handle_configure,
+};
+
+static void xdg_toplevel_handle_configure(void *data,
+		struct xdg_toplevel *xdg_toplevel, int32_t w, int32_t h,
+		struct wl_array *states) {
+	width = w;
+	height = h;
+}
+
+static void xdg_toplevel_handle_close(void *data,
+		struct xdg_toplevel *xdg_toplevel) {
+	exit(0);
+}
+
+static const struct xdg_toplevel_listener xdg_toplevel_listener = {
+	.configure = xdg_toplevel_handle_configure,
+	.close = xdg_toplevel_handle_close,
+};
+
+static void wl_keyboard_keymap(void *data, struct wl_keyboard *wl_keyboard,
+		uint32_t format, int32_t fd, uint32_t size) {
+}
+static void wl_keyboard_enter(void *data, struct wl_keyboard *wl_keyboard,
+		uint32_t serial, struct wl_surface *surface, struct wl_array *keys) {
+}
+static void wl_keyboard_leave(void *data, struct wl_keyboard *wl_keyboard,
+		uint32_t serial, struct wl_surface *surface) {
+}
+static void wl_keyboard_modifiers(void *data, struct wl_keyboard *wl_keyboard,
+		uint32_t serial, uint32_t mods_depressed, uint32_t mods_latched,
+		uint32_t mods_locked, uint32_t group) {
+}
+static void wl_keyboard_repeat_info(void *data, struct wl_keyboard *wl_keyboard,
+		int32_t rate, int32_t delay) {
+}
+
+static void wl_keyboard_key(void *data, struct wl_keyboard *wl_keyboard,
+		uint32_t serial, uint32_t time, uint32_t key, uint32_t state) {
+	if (state == WL_KEYBOARD_KEY_STATE_PRESSED) {
+		++keys;
+	} else {
+		--keys;
+	}
+	render_frame();
+}
+
+static struct wl_keyboard_listener keyboard_listener = {
+	.keymap = wl_keyboard_keymap,
+	.enter = wl_keyboard_enter,
+	.leave = wl_keyboard_leave,
+	.key = wl_keyboard_key,
+	.modifiers = wl_keyboard_modifiers,
+	.repeat_info = wl_keyboard_repeat_info,
+};
+
+static void seat_handle_capabilities(void *data, struct wl_seat *wl_seat,
+		enum wl_seat_capability caps) {
+	if ((caps & WL_SEAT_CAPABILITY_KEYBOARD)) {
+		struct wl_keyboard *keyboard = wl_seat_get_keyboard(wl_seat);
+		wl_keyboard_add_listener(keyboard, &keyboard_listener, NULL);
+	}
+}
+
+static void seat_handle_name(void *data, struct wl_seat *wl_seat,
+		const char *name) {
+	// Who cares
+}
+
+const struct wl_seat_listener seat_listener = {
+	.capabilities = seat_handle_capabilities,
+	.name = seat_handle_name,
+};
+
+static void handle_global(void *data, struct wl_registry *registry,
+		uint32_t name, const char *interface, uint32_t version) {
+	if (strcmp(interface, wl_compositor_interface.name) == 0) {
+		compositor = wl_registry_bind(registry, name,
+			&wl_compositor_interface, 1);
+	} else if (strcmp(interface, xdg_wm_base_interface.name) == 0) {
+		wm_base = wl_registry_bind(registry, name, &xdg_wm_base_interface, 1);
+	} else if (strcmp(interface, zwlr_input_inhibit_manager_v1_interface.name) == 0) {
+		input_inhibit_manager = wl_registry_bind(registry, name,
+			&zwlr_input_inhibit_manager_v1_interface, 1);
+	} else if (strcmp(interface, wl_seat_interface.name) == 0) {
+		seat = wl_registry_bind(registry, name, &wl_seat_interface, version);
+		wl_seat_add_listener(seat, &seat_listener, seat);
+	}
+}
+
+static void handle_global_remove(void *data, struct wl_registry *registry,
+		uint32_t name) {
+	// who cares
+}
+
+static const struct wl_registry_listener registry_listener = {
+	.global = handle_global,
+	.global_remove = handle_global_remove,
+};
+
+int main(int argc, char **argv) {
+	struct wl_display *display = wl_display_connect(NULL);
+	assert(display);
+	struct wl_registry *registry = wl_display_get_registry(display);
+	assert(registry);
+	wl_registry_add_listener(registry, &registry_listener, NULL);
+	wl_display_dispatch(display);
+	wl_display_roundtrip(display);
+	assert(compositor && seat && wm_base && input_inhibit_manager);
+
+	input_inhibitor = zwlr_input_inhibit_manager_v1_get_inhibitor(
+			input_inhibit_manager);
+	assert(input_inhibitor);
+
+	wlr_egl_init(&egl, EGL_PLATFORM_WAYLAND_EXT, display, NULL,
+		WL_SHM_FORMAT_ARGB8888);
+
+	struct wl_surface *surface = wl_compositor_create_surface(compositor);
+	assert(surface);
+	struct xdg_surface *xdg_surface =
+		xdg_wm_base_get_xdg_surface(wm_base, surface);
+	assert(xdg_surface);
+	struct xdg_toplevel *xdg_toplevel = xdg_surface_get_toplevel(xdg_surface);
+	assert(xdg_toplevel);
+
+	xdg_surface_add_listener(xdg_surface, &xdg_surface_listener, NULL);
+	xdg_toplevel_add_listener(xdg_toplevel, &xdg_toplevel_listener, NULL);
+
+	wl_surface_commit(surface);
+
+	egl_window = wl_egl_window_create(surface, width, height);
+	egl_surface = wlr_egl_create_surface(&egl, egl_window);
+
+	wl_display_roundtrip(display);
+
+	render_frame();
+
+	while (wl_display_dispatch(display) != -1) {
+		// This space intentionally left blank
+	}
+
+	return 0;
+}
diff --git a/examples/meson.build b/examples/meson.build
index 9e60c37a..6b9a1f46 100644
--- a/examples/meson.build
+++ b/examples/meson.build
@@ -55,3 +55,9 @@ executable(
 	'layer-shell.c',
 	dependencies: [wayland_cursor, wayland_client, wlr_protos, wlroots]
 )
+
+executable(
+	'input-inhibitor',
+	'input-inhibitor.c',
+	dependencies: [wayland_cursor, wayland_client, wlr_protos, wlroots]
+)
diff --git a/include/backend/libinput.h b/include/backend/libinput.h
index f828c310..4eee7eb8 100644
--- a/include/backend/libinput.h
+++ b/include/backend/libinput.h
@@ -29,6 +29,8 @@ struct wlr_libinput_input_device {
 	struct libinput_device *handle;
 };
 
+uint32_t usec_to_msec(uint64_t usec);
+
 void wlr_libinput_event(struct wlr_libinput_backend *state,
 		struct libinput_event *event);
 
diff --git a/include/rootston/desktop.h b/include/rootston/desktop.h
index c1dcad56..f150147b 100644
--- a/include/rootston/desktop.h
+++ b/include/rootston/desktop.h
@@ -6,6 +6,7 @@
 #include <wlr/types/wlr_compositor.h>
 #include <wlr/types/wlr_gamma_control.h>
 #include <wlr/types/wlr_idle.h>
+#include <wlr/types/wlr_input_inhibitor.h>
 #include <wlr/types/wlr_layer_shell.h>
 #include <wlr/types/wlr_linux_dmabuf.h>
 #include <wlr/types/wlr_list.h>
@@ -47,6 +48,7 @@ struct roots_desktop {
 	struct wlr_primary_selection_device_manager *primary_selection_device_manager;
 	struct wlr_idle *idle;
 	struct wlr_idle_inhibit_manager_v1 *idle_inhibit;
+	struct wlr_input_inhibit_manager *input_inhibit;
 	struct wlr_linux_dmabuf *linux_dmabuf;
 	struct wlr_layer_shell *layer_shell;
 
@@ -57,6 +59,8 @@ struct roots_desktop {
 	struct wl_listener wl_shell_surface;
 	struct wl_listener layer_shell_surface;
 	struct wl_listener decoration_new;
+	struct wl_listener input_inhibit_activate;
+	struct wl_listener input_inhibit_deactivate;
 
 #ifdef WLR_HAS_XWAYLAND
 	struct wlr_xwayland *xwayland;
diff --git a/include/rootston/seat.h b/include/rootston/seat.h
index 6f482723..d2ef90f3 100644
--- a/include/rootston/seat.h
+++ b/include/rootston/seat.h
@@ -19,6 +19,9 @@ struct roots_seat {
 	// If the focused layer is set, views cannot receive keyboard focus
 	struct wlr_layer_surface *focused_layer;
 
+	// If non-null, only this client can receive input events
+	struct wl_client *exclusive_client;
+
 	struct wl_list views; // roots_seat_view::link
 	bool has_focus;
 
@@ -125,4 +128,10 @@ void roots_drag_icon_update_position(struct roots_drag_icon *icon);
 
 void roots_drag_icon_damage_whole(struct roots_drag_icon *icon);
 
+void roots_seat_set_exclusive_client(struct roots_seat *seat,
+		struct wl_client *client);
+
+bool roots_seat_allow_input(struct roots_seat *seat,
+		struct wl_resource *resource);
+
 #endif
diff --git a/include/wlr/backend.h b/include/wlr/backend.h
index e3b14add..f5482e04 100644
--- a/include/wlr/backend.h
+++ b/include/wlr/backend.h
@@ -46,6 +46,4 @@ struct wlr_egl *wlr_backend_get_egl(struct wlr_backend *backend);
  */
 struct wlr_renderer *wlr_backend_get_renderer(struct wlr_backend *backend);
 
-uint32_t usec_to_msec(uint64_t usec);
-
 #endif
diff --git a/include/wlr/types/wlr_input_inhibitor.h b/include/wlr/types/wlr_input_inhibitor.h
new file mode 100644
index 00000000..4416c18f
--- /dev/null
+++ b/include/wlr/types/wlr_input_inhibitor.h
@@ -0,0 +1,25 @@
+#ifndef WLR_TYPES_INPUT_INHIBITOR_H
+#define WLR_TYPES_INPUT_INHIBITOR_H
+#include <wayland-server.h>
+
+struct wlr_input_inhibit_manager {
+	struct wl_global *wl_global;
+	struct wl_client *active_client;
+	struct wl_resource *active_inhibitor;
+
+	struct wl_listener display_destroy;
+
+	struct {
+		struct wl_signal activate;   // struct wlr_input_inhibit_manager *
+		struct wl_signal deactivate; // struct wlr_input_inhibit_manager *
+	} events;
+
+	void *data;
+};
+
+struct wlr_input_inhibit_manager *wlr_input_inhibit_manager_create(
+		struct wl_display *display);
+void wlr_input_inhibit_manager_destroy(
+		struct wlr_input_inhibit_manager *manager);
+
+#endif
diff --git a/include/wlr/types/wlr_seat.h b/include/wlr/types/wlr_seat.h
index 124c1cb8..4c7e34b9 100644
--- a/include/wlr/types/wlr_seat.h
+++ b/include/wlr/types/wlr_seat.h
@@ -530,6 +530,7 @@ bool wlr_seat_touch_has_grab(struct wlr_seat *seat);
  */
 bool wlr_seat_validate_grab_serial(struct wlr_seat *seat, uint32_t serial);
 
-struct wlr_seat_client *wlr_seat_client_from_resource(struct wl_resource *resource);
+struct wlr_seat_client *wlr_seat_client_from_resource(
+		struct wl_resource *resource);
 
 #endif
diff --git a/protocol/meson.build b/protocol/meson.build
index a41fdec3..b88b4b77 100644
--- a/protocol/meson.build
+++ b/protocol/meson.build
@@ -31,6 +31,7 @@ protocols = [
 	'screenshooter.xml',
 	'server-decoration.xml',
 	'wlr-layer-shell-unstable-v1.xml',
+	'wlr-input-inhibitor-unstable-v1.xml',
 ]
 
 client_protocols = [
@@ -40,6 +41,7 @@ client_protocols = [
 	'idle.xml',
 	'screenshooter.xml',
 	'wlr-layer-shell-unstable-v1.xml',
+	'wlr-input-inhibitor-unstable-v1.xml',
 ]
 
 wl_protos_src = []
diff --git a/protocol/wlr-input-inhibitor-unstable-v1.xml b/protocol/wlr-input-inhibitor-unstable-v1.xml
new file mode 100644
index 00000000..b62d1bb4
--- /dev/null
+++ b/protocol/wlr-input-inhibitor-unstable-v1.xml
@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="wlr_input_inhibit_unstable_v1">
+  <copyright>
+    Copyright © 2018 Drew DeVault
+
+    Permission to use, copy, modify, distribute, and sell this
+    software and its documentation for any purpose is hereby granted
+    without fee, provided that the above copyright notice appear in
+    all copies and that both that copyright notice and this permission
+    notice appear in supporting documentation, and that the name of
+    the copyright holders not be used in advertising or publicity
+    pertaining to distribution of the software without specific,
+    written prior permission.  The copyright holders make no
+    representations about the suitability of this software for any
+    purpose.  It is provided "as is" without express or implied
+    warranty.
+
+    THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+    SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+    FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+    SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+    AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+    ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+    THIS SOFTWARE.
+  </copyright>
+
+  <interface name="zwlr_input_inhibit_manager_v1" version="1">
+    <description summary="inhibits input events to other clients">
+      Clients can use this interface to prevent input events from being sent to
+      any surfaces but its own, which is useful for example in lock screen
+      software. It is assumed that access to this interface will be locked down
+      to whitelisted clients by the compositor.
+    </description>
+
+    <request name="get_inhibitor">
+      <description summary="inhibit input to other clients">
+        Activates the input inhibitor. As long as the inhibitor is active, the
+        compositor will not send input events to other clients.
+      </description>
+      <arg name="id" type="new_id" interface="zwlr_input_inhibitor_v1"/>
+    </request>
+
+    <enum name="error">
+      <entry name="already_inhibited" value="0" summary="an input inhibitor is already in use on the compositor"/>
+    </enum>
+  </interface>
+
+  <interface name="zwlr_input_inhibitor_v1" version="1">
+    <description summary="inhibits input to other clients">
+      While this resource exists, input to clients other than the owner of the
+      inhibitor resource will not receive input events. The client that owns
+      this resource will receive all input events normally. The compositor will
+      also disable all of its own input processing (such as keyboard shortcuts)
+      while the inhibitor is active.
+
+      The compositor may continue to send input events to selected clients,
+      such as an on-screen keyboard (via the input-method protocol).
+    </description>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy the input inhibitor object">
+        Destroy the inhibitor and allow other clients to receive input.
+      </description>
+    </request>
+  </interface>
+</protocol>
diff --git a/rootston/cursor.c b/rootston/cursor.c
index ac46ff5d..21e32a09 100644
--- a/rootston/cursor.c
+++ b/rootston/cursor.c
@@ -111,6 +111,9 @@ static void roots_passthrough_cursor(struct roots_cursor *cursor,
 	if (surface) {
 		client = wl_resource_get_client(surface->resource);
 	}
+	if (surface && !roots_seat_allow_input(cursor->seat, surface->resource)) {
+		return;
+	}
 
 	if (cursor->cursor_client != client) {
 		wlr_xcursor_manager_set_cursor_image(cursor->xcursor_manager,
@@ -327,7 +330,7 @@ void roots_cursor_handle_touch_down(struct roots_cursor *cursor,
 			desktop, lx, ly, &sx, &sy, NULL);
 
 	uint32_t serial = 0;
-	if (surface) {
+	if (surface && roots_seat_allow_input(cursor->seat, surface->resource)) {
 		serial = wlr_seat_touch_notify_down(cursor->seat->seat, surface,
 			event->time_msec, event->touch_id, sx, sy);
 	}
@@ -378,7 +381,7 @@ void roots_cursor_handle_touch_motion(struct roots_cursor *cursor,
 	struct wlr_surface *surface = desktop_surface_at(
 			desktop, lx, ly, &sx, &sy, NULL);
 
-	if (surface) {
+	if (surface && roots_seat_allow_input(cursor->seat, surface->resource)) {
 		wlr_seat_touch_point_focus(cursor->seat->seat, surface,
 			event->time_msec, event->touch_id, sx, sy);
 		wlr_seat_touch_notify_motion(cursor->seat->seat, event->time_msec,
diff --git a/rootston/desktop.c b/rootston/desktop.c
index ab16ed3d..f6801332 100644
--- a/rootston/desktop.c
+++ b/rootston/desktop.c
@@ -10,6 +10,7 @@
 #include <wlr/types/wlr_gamma_control.h>
 #include <wlr/types/wlr_idle.h>
 #include <wlr/types/wlr_idle_inhibit_v1.h>
+#include <wlr/types/wlr_input_inhibitor.h>
 #include <wlr/types/wlr_layer_shell.h>
 #include <wlr/types/wlr_linux_dmabuf.h>
 #include <wlr/types/wlr_output_layout.h>
@@ -755,6 +756,25 @@ static void handle_layout_change(struct wl_listener *listener, void *data) {
 	}
 }
 
+static void input_inhibit_activate(struct wl_listener *listener, void *data) {
+	struct roots_desktop *desktop = wl_container_of(
+			listener, desktop, input_inhibit_activate);
+	struct roots_seat *seat;
+	wl_list_for_each(seat, &desktop->server->input->seats, link) {
+		roots_seat_set_exclusive_client(seat,
+				desktop->input_inhibit->active_client);
+	}
+}
+
+static void input_inhibit_deactivate(struct wl_listener *listener, void *data) {
+	struct roots_desktop *desktop = wl_container_of(
+			listener, desktop, input_inhibit_deactivate);
+	struct roots_seat *seat;
+	wl_list_for_each(seat, &desktop->server->input->seats, link) {
+		roots_seat_set_exclusive_client(seat, NULL);
+	}
+}
+
 struct roots_desktop *desktop_create(struct roots_server *server,
 		struct roots_config *config) {
 	wlr_log(L_DEBUG, "Initializing roots desktop");
@@ -855,6 +875,15 @@ struct roots_desktop *desktop_create(struct roots_server *server,
 	desktop->idle = wlr_idle_create(server->wl_display);
 	desktop->idle_inhibit = wlr_idle_inhibit_v1_create(server->wl_display);
 
+	desktop->input_inhibit =
+		wlr_input_inhibit_manager_create(server->wl_display);
+	desktop->input_inhibit_activate.notify = input_inhibit_activate;
+	wl_signal_add(&desktop->input_inhibit->events.activate,
+			&desktop->input_inhibit_activate);
+	desktop->input_inhibit_deactivate.notify = input_inhibit_deactivate;
+	wl_signal_add(&desktop->input_inhibit->events.deactivate,
+			&desktop->input_inhibit_deactivate);
+
 	struct wlr_egl *egl = wlr_backend_get_egl(server->backend);
 	desktop->linux_dmabuf = wlr_linux_dmabuf_create(server->wl_display, egl);
 	return desktop;
diff --git a/rootston/seat.c b/rootston/seat.c
index cfdeab00..e12df7d6 100644
--- a/rootston/seat.c
+++ b/rootston/seat.c
@@ -1,6 +1,8 @@
+#define _POSIX_C_SOURCE 199309L
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
+#include <time.h>
 #include <wayland-server.h>
 #include <wlr/config.h>
 #include <wlr/types/wlr_idle.h>
@@ -716,7 +718,17 @@ struct roots_seat_view *roots_seat_view_from_view(
 	return seat_view;
 }
 
+bool roots_seat_allow_input(struct roots_seat *seat,
+		struct wl_resource *resource) {
+	return !seat->exclusive_client ||
+			wl_resource_get_client(resource) == seat->exclusive_client;
+}
+
 void roots_seat_set_focus(struct roots_seat *seat, struct roots_view *view) {
+	if (view && !roots_seat_allow_input(seat, view->wlr_surface->resource)) {
+		return;
+	}
+
 	// Make sure the view will be rendered on top of others, even if it's
 	// already focused in this seat
 	if (view != NULL) {
@@ -811,11 +823,14 @@ void roots_seat_set_focus(struct roots_seat *seat, struct roots_view *view) {
  */
 void roots_seat_set_focus_layer(struct roots_seat *seat,
 		struct wlr_layer_surface *layer) {
-	struct wlr_keyboard *keyboard = wlr_seat_get_keyboard(seat->seat);
 	if (!layer) {
 		seat->focused_layer = NULL;
 		return;
 	}
+	struct wlr_keyboard *keyboard = wlr_seat_get_keyboard(seat->seat);
+	if (!roots_seat_allow_input(seat, layer->resource)) {
+		return;
+	}
 	if (seat->has_focus) {
 		struct roots_view *prev_focus = roots_seat_get_focus(seat);
 		wlr_seat_keyboard_clear_focus(seat->seat);
@@ -835,6 +850,46 @@ void roots_seat_set_focus_layer(struct roots_seat *seat,
 	}
 }
 
+void roots_seat_set_exclusive_client(struct roots_seat *seat,
+		struct wl_client *client) {
+	if (!client) {
+		seat->exclusive_client = client;
+		// Triggers a refocus of the topmost surface layer if necessary
+		// TODO: Make layer surface focus per-output based on cursor position
+		struct roots_output *output;
+		wl_list_for_each(output, &seat->input->server->desktop->outputs, link) {
+			arrange_layers(output);
+		}
+		return;
+	}
+	if (seat->focused_layer) {
+		if (wl_resource_get_client(seat->focused_layer->resource) != client) {
+			roots_seat_set_focus_layer(seat, NULL);
+		}
+	}
+	if (seat->has_focus) {
+		struct roots_view *focus = roots_seat_get_focus(seat);
+		if (wl_resource_get_client(focus->wlr_surface->resource) != client) {
+			roots_seat_set_focus(seat, NULL);
+		}
+	}
+	if (seat->seat->pointer_state.focused_client) {
+		if (seat->seat->pointer_state.focused_client->client != client) {
+			wlr_seat_pointer_clear_focus(seat->seat);
+		}
+	}
+	struct timespec now;
+	clock_gettime(CLOCK_MONOTONIC, &now);
+	struct wlr_touch_point *point;
+	wl_list_for_each(point, &seat->seat->touch_state.touch_points, link) {
+		if (point->client->client != client) {
+			wlr_seat_touch_point_clear_focus(seat->seat,
+					now.tv_nsec / 1000, point->touch_id);
+		}
+	}
+	seat->exclusive_client = client;
+}
+
 void roots_seat_cycle_focus(struct roots_seat *seat) {
 	if (wl_list_empty(&seat->views)) {
 		return;
diff --git a/types/meson.build b/types/meson.build
index 198563b1..eda5f4e4 100644
--- a/types/meson.build
+++ b/types/meson.build
@@ -10,6 +10,7 @@ lib_wlr_types = static_library(
 		'wlr_idle.c',
 		'wlr_idle_inhibit_v1.c',
 		'wlr_input_device.c',
+		'wlr_input_inhibitor.c',
 		'wlr_keyboard.c',
 		'wlr_layer_shell.c',
 		'wlr_linux_dmabuf.c',
diff --git a/types/wlr_input_inhibitor.c b/types/wlr_input_inhibitor.c
new file mode 100644
index 00000000..d42a5c0c
--- /dev/null
+++ b/types/wlr_input_inhibitor.c
@@ -0,0 +1,130 @@
+#include <assert.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <wayland-server.h>
+#include "wlr/types/wlr_input_inhibitor.h"
+#include "wlr-input-inhibitor-unstable-v1-protocol.h"
+
+static const struct zwlr_input_inhibit_manager_v1_interface inhibit_manager_implementation;
+
+static struct wlr_input_inhibit_manager *input_inhibit_manager_from_resource(
+		struct wl_resource *resource) {
+	assert(wl_resource_instance_of(resource, &zwlr_input_inhibit_manager_v1_interface,
+			&inhibit_manager_implementation));
+	return wl_resource_get_user_data(resource);
+}
+
+static void input_inhibitor_destroy(struct wl_client *client,
+			struct wl_resource *resource) {
+	struct wlr_input_inhibit_manager *manager =
+		input_inhibit_manager_from_resource(resource);
+	manager->active_client = NULL;
+	manager->active_inhibitor = NULL;
+	wl_resource_destroy(resource);
+	wl_signal_emit(&manager->events.deactivate, manager);
+}
+
+static struct zwlr_input_inhibitor_v1_interface input_inhibitor_implementation = {
+	.destroy = input_inhibitor_destroy,
+};
+
+static void inhibit_manager_get_inhibitor(struct wl_client *client,
+		struct wl_resource *resource, uint32_t id) {
+	struct wlr_input_inhibit_manager *manager =
+		input_inhibit_manager_from_resource(resource);
+	if (manager->active_client || manager->active_inhibitor) {
+		wl_resource_post_error(resource,
+			ZWLR_INPUT_INHIBIT_MANAGER_V1_ERROR_ALREADY_INHIBITED,
+			"this compositor already has input inhibited");
+		return;
+	}
+
+	struct wl_resource *wl_resource = wl_resource_create(client,
+			&zwlr_input_inhibitor_v1_interface,
+			wl_resource_get_version(resource), id);
+	if (!wl_resource) {
+		wl_client_post_no_memory(client);
+	}
+	wl_resource_set_implementation(wl_resource, &input_inhibitor_implementation,
+			manager, NULL);
+
+	manager->active_client = client;
+	manager->active_inhibitor = wl_resource;
+
+	wl_signal_emit(&manager->events.activate, manager);
+}
+
+static const struct zwlr_input_inhibit_manager_v1_interface inhibit_manager_implementation = {
+	.get_inhibitor = inhibit_manager_get_inhibitor
+};
+
+static void input_manager_client_destroy(struct wl_resource *resource) {
+	struct wlr_input_inhibit_manager *manager =
+		input_inhibit_manager_from_resource(resource);
+	if (manager->active_client == wl_resource_get_client(resource)) {
+		input_inhibitor_destroy(manager->active_client, resource);
+	}
+}
+
+static void inhibit_manager_bind(struct wl_client *wl_client, void *data,
+		uint32_t version, uint32_t id) {
+	struct wlr_input_inhibit_manager *manager = data;
+	assert(wl_client && manager);
+
+	struct wl_resource *wl_resource = wl_resource_create(wl_client,
+		&zwlr_input_inhibit_manager_v1_interface, version, id);
+	if (wl_resource == NULL) {
+		wl_client_post_no_memory(wl_client);
+		return;
+	}
+	wl_resource_set_implementation(wl_resource,
+			&inhibit_manager_implementation, manager,
+			input_manager_client_destroy);
+}
+
+void wlr_input_inhibit_manager_destroy(
+		struct wlr_input_inhibit_manager *manager) {
+	if (!manager) {
+		return;
+	}
+	if (manager->active_client) {
+		input_inhibitor_destroy(manager->active_client,
+				manager->active_inhibitor);
+	}
+	wl_list_remove(&manager->display_destroy.link);
+	wl_global_destroy(manager->wl_global);
+	free(manager);
+}
+
+static void handle_display_destroy(struct wl_listener *listener, void *data) {
+	struct wlr_input_inhibit_manager *manager =
+		wl_container_of(listener, manager, display_destroy);
+	wlr_input_inhibit_manager_destroy(manager);
+}
+
+struct wlr_input_inhibit_manager *wlr_input_inhibit_manager_create(
+		struct wl_display *display) {
+	// TODO: Client destroy
+	struct wlr_input_inhibit_manager *manager =
+		calloc(1, sizeof(struct wlr_input_inhibit_manager));
+	if (!manager) {
+		return NULL;
+	}
+
+	manager->wl_global = wl_global_create(display,
+			&zwlr_input_inhibit_manager_v1_interface,
+			1, manager, inhibit_manager_bind);
+	if (manager->wl_global == NULL){
+		wl_list_remove(&manager->display_destroy.link);
+		free(manager);
+		return NULL;
+	}
+
+	wl_signal_init(&manager->events.activate);
+	wl_signal_init(&manager->events.deactivate);
+
+	manager->display_destroy.notify = handle_display_destroy;
+	wl_display_add_destroy_listener(display, &manager->display_destroy);
+
+	return manager;
+}