[mutter] remote-desktop: Add keyboard keycode event support

[Jonas Ådahl <jadahl src gnome org>]

commit 5ee825c0816ca5391702ac6271bd1d30a900ddb1
Author: Jonas Ådahl <jadahl gmail com>
Date:   Mon Jan 29 14:38:13 2018 +0800

    remote-desktop: Add keyboard keycode event support
    
    Keyboard keycode events will act as a physical keyboard thus depend on
    the active keyboard layout.

 src/backends/meta-remote-desktop-session.c | 33 ++++++++++++++++++++++++++++++
 src/org.gnome.Mutter.RemoteDesktop.xml     | 10 +++++++++
 2 files changed, 43 insertions(+)
---
diff --git a/src/backends/meta-remote-desktop-session.c b/src/backends/meta-remote-desktop-session.c
index 3c39ef6e4..eaf6e718b 100644
--- a/src/backends/meta-remote-desktop-session.c
+++ b/src/backends/meta-remote-desktop-session.c
@@ -255,6 +255,38 @@ handle_stop (MetaDBusRemoteDesktopSession *skeleton,
   return TRUE;
 }
 
+static gboolean
+handle_notify_keyboard_keycode (MetaDBusRemoteDesktopSession *skeleton,
+                                GDBusMethodInvocation        *invocation,
+                                unsigned int                  keycode,
+                                gboolean                      pressed)
+{
+  MetaRemoteDesktopSession *session = META_REMOTE_DESKTOP_SESSION (skeleton);
+  ClutterKeyState state;
+
+  if (!check_permission (session, invocation))
+    {
+      g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
+                                             G_DBUS_ERROR_ACCESS_DENIED,
+                                             "Permission denied");
+      return TRUE;
+    }
+
+  if (pressed)
+    state = CLUTTER_KEY_STATE_PRESSED;
+  else
+    state = CLUTTER_KEY_STATE_RELEASED;
+
+  clutter_virtual_input_device_notify_key (session->virtual_keyboard,
+                                           CLUTTER_CURRENT_TIME,
+                                           keycode,
+                                           state);
+
+  meta_dbus_remote_desktop_session_complete_notify_keyboard_keycode (skeleton,
+                                                                     invocation);
+  return TRUE;
+}
+
 static gboolean
 handle_notify_keyboard_keysym (MetaDBusRemoteDesktopSession *skeleton,
                                GDBusMethodInvocation        *invocation,
@@ -445,6 +477,7 @@ meta_remote_desktop_session_init_iface (MetaDBusRemoteDesktopSessionIface *iface
 {
   iface->handle_start = handle_start;
   iface->handle_stop = handle_stop;
+  iface->handle_notify_keyboard_keycode = handle_notify_keyboard_keycode;
   iface->handle_notify_keyboard_keysym = handle_notify_keyboard_keysym;
   iface->handle_notify_pointer_button = handle_notify_pointer_button;
   iface->handle_notify_pointer_axis_discrete = handle_notify_pointer_axis_discrete;
diff --git a/src/org.gnome.Mutter.RemoteDesktop.xml b/src/org.gnome.Mutter.RemoteDesktop.xml
index 7807f1608..4af5fe317 100644
--- a/src/org.gnome.Mutter.RemoteDesktop.xml
+++ b/src/org.gnome.Mutter.RemoteDesktop.xml
@@ -57,6 +57,16 @@
     -->
     <signal name="Closed" />
 
+    <!--
+       NotifyKeyboardKeycode:
+
+       A key identified by a keysym was pressed or released
+     -->
+    <method name="NotifyKeyboardKeycode">
+      <arg name="keycode" type="u" direction="in" />
+      <arg name="state" type="b" direction="in" />
+    </method>
+
     <!--
        NotifyKeyboardKeysym: