Add wlr_input_inhibitor

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

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 = []

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>

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',

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;
+}