session_recovery: Add wayland extension protocol prototype for session recovery

Like with all other wayland protocols I add the files generated with wayland
scanner here. Also the xml so we have the source around for updating and
modifications. We might want to think about wayland-scanner support in our build
system but this works for now.

The protocol prototype is hold simple and does only have a uuid signal and provide
call to handle the uuid assignment from compositor to app and app providing its
uuid if present already.

src/bin/Makefile.mk

@@ -368,6 +368,8 @@ endif
 if HAVE_WAYLAND
 enlightenment_src += \
 src/bin/e_uuid_store.c \
+src/bin/session-recovery-protocol.c \
+src/bin/session-recovery-server-protocol.h \
 src/bin/e_comp_wl_data.c \
 src/bin/e_comp_wl_input.c \
 src/bin/e_comp_wl.c

src/bin/session-recovery-protocol.c

@@ -0,0 +1,23 @@
+#include <stdlib.h>
+#include <stdint.h>
+#include "wayland-util.h"
+
+
+static const struct wl_interface *types[] = {
+	NULL,
+};
+
+static const struct wl_message session_recovery_requests[] = {
+	{ "provide_uuid", "s", types + 0 },
+};
+
+static const struct wl_message session_recovery_events[] = {
+	{ "uuid", "s", types + 0 },
+};
+
+WL_EXPORT const struct wl_interface session_recovery_interface = {
+	"session_recovery", 1,
+	1, session_recovery_requests,
+	1, session_recovery_events,
+};
+

src/bin/session-recovery-server-protocol.h

@@ -0,0 +1,43 @@
+#ifndef SESSION_RECOVERY_SERVER_PROTOCOL_H
+#define SESSION_RECOVERY_SERVER_PROTOCOL_H
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+#include <stddef.h>
+#include "wayland-util.h"
+
+struct wl_client;
+struct wl_resource;
+
+struct session_recovery;
+
+extern const struct wl_interface session_recovery_interface;
+
+struct session_recovery_interface {
+	/**
+	 * provide_uuid - (none)
+	 * @uuid: (none)
+	 */
+	void (*provide_uuid)(struct wl_client *client,
+			     struct wl_resource *resource,
+			     const char *uuid);
+};
+
+#define SESSION_RECOVERY_UUID	0
+
+#define SESSION_RECOVERY_UUID_SINCE_VERSION	1
+
+static inline void
+session_recovery_send_uuid(struct wl_resource *resource_, const char *uuid)
+{
+	wl_resource_post_event(resource_, SESSION_RECOVERY_UUID, uuid);
+}
+
+#ifdef  __cplusplus
+}
+#endif
+
+#endif

src/bin/session-recovery.xml

@@ -0,0 +1,12 @@
+<protocol name="session_recovery">
+
+  <interface name="session_recovery" version="1">
+    <request name="provide_uuid">
+      <arg name="uuid" type="string"/>
+    </request>
+    <event name="uuid">
+      <arg name="uuid" type="string"/>
+    </event>
+  </interface>
+
+</protocol>