[mutter/wip/wayland-2: 9/15] Add keybindings for switching VTs

[Giovanni Campagna <gcampagna src gnome org>]

commit 918e6a78c3e0f3247878566fb8dce24a93b0a9ba
Author: Giovanni Campagna <gcampagn redhat com>
Date:   Tue Jul 16 14:37:49 2013 +0200

    Add keybindings for switching VTs
    
    Once mutter is started from weston-launch on its own VT, there is
    no way to change VT again (for example to actually start an application),
    because the keyboard is put in raw mode.
    So introduce some keybindings mimicking the standard X ones (Ctrl+Alt+Fn)
    that switch the VT manually when activated.

 src/core/keybindings.c              |   85 +++++++++++++++++++++++++++++++++++
 src/org.gnome.mutter.gschema.xml.in |   29 ++++++++++++
 src/wayland/meta-tty.c              |   17 +++++--
 src/wayland/meta-tty.h              |    4 ++
 src/wayland/meta-wayland-private.h  |    4 +-
 src/wayland/meta-wayland.c          |    6 +++
 6 files changed, 138 insertions(+), 7 deletions(-)
---
diff --git a/src/core/keybindings.c b/src/core/keybindings.c
index 5455344..c17e670 100644
--- a/src/core/keybindings.c
+++ b/src/core/keybindings.c
@@ -4098,6 +4098,38 @@ handle_set_spew_mark (MetaDisplay    *display,
   meta_verbose ("-- MARK MARK MARK MARK --\n");
 }
 
+static void
+handle_switch_vt (MetaDisplay    *display,
+                  MetaScreen     *screen,
+                  MetaWindow     *window,
+                  XIDeviceEvent  *event,
+                  MetaKeyBinding *binding,
+                  gpointer        dummy)
+{
+    gint vt = binding->handler->data;
+    MetaWaylandCompositor *compositor;
+    MetaTTY *tty;
+
+    compositor = meta_wayland_compositor_get_default ();
+    tty = meta_wayland_compositor_get_tty (compositor);
+
+    if (tty)
+      {
+        GError *error;
+
+        error = NULL;
+        if (!meta_tty_activate_vt (tty, vt, &error))
+          {
+            g_warning ("Failed to switch VT: %s", error->message);
+            g_error_free (error);
+          }
+      }
+    else
+      {
+        g_debug ("Ignoring VT switch keybinding, not running as VT manager");
+      }
+}
+
 void
 meta_set_keybindings_disabled (gboolean setting)
 {
@@ -4430,6 +4462,59 @@ init_builtin_key_bindings (MetaDisplay *display)
                           META_KEYBINDING_ACTION_SET_SPEW_MARK,
                           handle_set_spew_mark, 0);
 
+  if (meta_is_display_server ())
+    {
+      add_builtin_keybinding (display,
+                              "switch-to-session-1",
+                              mutter_keybindings,
+                              META_KEY_BINDING_NONE,
+                              META_KEYBINDING_ACTION_NONE,
+                              handle_switch_vt, 1);
+
+      add_builtin_keybinding (display,
+                              "switch-to-session-2",
+                              mutter_keybindings,
+                              META_KEY_BINDING_NONE,
+                              META_KEYBINDING_ACTION_NONE,
+                              handle_switch_vt, 2);
+
+      add_builtin_keybinding (display,
+                              "switch-to-session-3",
+                              mutter_keybindings,
+                              META_KEY_BINDING_NONE,
+                              META_KEYBINDING_ACTION_NONE,
+                              handle_switch_vt, 3);
+
+      add_builtin_keybinding (display,
+                              "switch-to-session-4",
+                              mutter_keybindings,
+                              META_KEY_BINDING_NONE,
+                              META_KEYBINDING_ACTION_NONE,
+                              handle_switch_vt, 4);
+
+      add_builtin_keybinding (display,
+                              "switch-to-session-5",
+                              mutter_keybindings,
+                              META_KEY_BINDING_NONE,
+                              META_KEYBINDING_ACTION_NONE,
+                              handle_switch_vt, 5);
+
+      add_builtin_keybinding (display,
+                              "switch-to-session-6",
+                              mutter_keybindings,
+                              META_KEY_BINDING_NONE,
+                              META_KEYBINDING_ACTION_NONE,
+                              handle_switch_vt, 6);
+
+      add_builtin_keybinding (display,
+                              "switch-to-session-7",
+                              mutter_keybindings,
+                              META_KEY_BINDING_NONE,
+                              META_KEYBINDING_ACTION_NONE,
+                              handle_switch_vt, 7);
+    }
+
+
 #undef REVERSES_AND_REVERSED
 
   /************************ PER WINDOW BINDINGS ************************/
diff --git a/src/org.gnome.mutter.gschema.xml.in b/src/org.gnome.mutter.gschema.xml.in
index 9d83cf3..81566cf 100644
--- a/src/org.gnome.mutter.gschema.xml.in
+++ b/src/org.gnome.mutter.gschema.xml.in
@@ -116,5 +116,34 @@
       <_summary>Cancel tab popup</_summary>
     </key>
 
+    <key name="switch-to-session-1" type="as">
+      <default><![CDATA[['<Primary><Alt>F1']]]></default>
+      <_summary>Switch to VT 1</_summary>
+    </key>
+    <key name="switch-to-session-2" type="as">
+      <default><![CDATA[['<Primary><Alt>F2']]]></default>
+      <_summary>Switch to VT 2</_summary>
+    </key>
+    <key name="switch-to-session-3" type="as">
+      <default><![CDATA[['<Primary><Alt>F3']]]></default>
+      <_summary>Switch to VT 3</_summary>
+    </key>
+    <key name="switch-to-session-4" type="as">
+      <default><![CDATA[['<Primary><Alt>F4']]]></default>
+      <_summary>Switch to VT 4</_summary>
+    </key>
+    <key name="switch-to-session-5" type="as">
+      <default><![CDATA[['<Primary><Alt>F5']]]></default>
+      <_summary>Switch to VT 5</_summary>
+    </key>
+    <key name="switch-to-session-6" type="as">
+      <default><![CDATA[['<Primary><Alt>F6']]]></default>
+      <_summary>Switch to VT 6</_summary>
+    </key>
+    <key name="switch-to-session-7" type="as">
+      <default><![CDATA[['<Primary><Alt>F7']]]></default>
+      <_summary>Switch to VT 7</_summary>
+    </key>
+
   </schema>
 </schemalist>
diff --git a/src/wayland/meta-tty.c b/src/wayland/meta-tty.c
index 82967fe..31a6359 100644
--- a/src/wayland/meta-tty.c
+++ b/src/wayland/meta-tty.c
@@ -157,12 +157,19 @@ try_open_vt (MetaTTY  *tty,
   return fd;
 }
 
-/* FIXME? */
-static int
-tty_activate_vt (MetaTTY *tty,
-                int      vt)
+gboolean
+meta_tty_activate_vt (MetaTTY  *tty,
+                     int       vt,
+                     GError  **error)
 {
-  return ioctl(tty->fd, VT_ACTIVATE, vt);
+  if (ioctl(tty->fd, VT_ACTIVATE, vt) < 0)
+    {
+      g_set_error (error, G_IO_ERROR, g_io_error_from_errno (errno),
+                  strerror (errno));
+      return FALSE;
+    }
+  else
+    return TRUE;
 }
 
 static int
diff --git a/src/wayland/meta-tty.h b/src/wayland/meta-tty.h
index 2c3bf2a..f5a2464 100644
--- a/src/wayland/meta-tty.h
+++ b/src/wayland/meta-tty.h
@@ -38,6 +38,10 @@ GType             meta_tty_get_type                (void) G_GNUC_CONST;
 
 MetaTTY          *meta_tty_new                     (void);
 
+gboolean          meta_tty_activate_vt             (MetaTTY  *self,
+                                                   int       number,
+                                                   GError  **error);
+
 G_END_DECLS
 
 #endif /* META_TTY_H */
diff --git a/src/wayland/meta-wayland-private.h b/src/wayland/meta-wayland-private.h
index 9fed560..db24448 100644
--- a/src/wayland/meta-wayland-private.h
+++ b/src/wayland/meta-wayland-private.h
@@ -355,8 +355,6 @@ void                    meta_wayland_finalize                   (void);
  * API after meta_wayland_init() has been called. */
 MetaWaylandCompositor  *meta_wayland_compositor_get_default     (void);
 
-void                    meta_wayland_handle_sig_child           (void);
-
 MetaWaylandSurface     *meta_wayland_lookup_surface_for_xid     (guint32 xid);
 
 void                    meta_wayland_compositor_repick          (MetaWaylandCompositor *compositor);
@@ -364,4 +362,6 @@ void                    meta_wayland_compositor_repick          (MetaWaylandComp
 void                    meta_wayland_compositor_set_input_focus (MetaWaylandCompositor *compositor,
                                                                  MetaWindow            *window);
 
+MetaTTY                *meta_wayland_compositor_get_tty         (MetaWaylandCompositor *compositor);
+
 #endif /* META_WAYLAND_PRIVATE_H */
diff --git a/src/wayland/meta-wayland.c b/src/wayland/meta-wayland.c
index b8515ea..0769670 100644
--- a/src/wayland/meta-wayland.c
+++ b/src/wayland/meta-wayland.c
@@ -1953,3 +1953,9 @@ meta_wayland_finalize (void)
   stop_xwayland (compositor);
   g_clear_object (&compositor->tty);
 }
+
+MetaTTY *
+meta_wayland_compositor_get_tty (MetaWaylandCompositor *compositor)
+{
+  return compositor->tty;
+}