wayland: Process the keymap that is sent over from the compositor

Load the keymap from the file descriptor that the compositor has sent us and
then save that into our internal object for future use.

gdk/wayland/gdkdevice-wayland.c

@@ -36,6 +36,7 @@
 #include <X11/keysym.h>
 
 #include <sys/time.h>
+#include <sys/mman.h>
 
 #define GDK_TYPE_DEVICE_CORE         (gdk_device_core_get_type ())
 #define GDK_DEVICE_CORE(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), GDK_TYPE_DEVICE_CORE, GdkDeviceCore))
@@ -1126,6 +1127,37 @@ keyboard_handle_keymap (void               *data,
                        int                 fd,
                        uint32_t            size)
 {
+  GdkWaylandDevice *device = data;
+  GdkWaylandDisplay *display = GDK_WAYLAND_DISPLAY (device->display);
+  GdkKeymap *gdk_keymap;
+  gchar *keymap_data;
+  struct xkb_keymap *keymap;
+
+  if (format != WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1)
+    {
+      g_critical (G_STRLOC ": Unknown keymap format");
+      close (fd);
+      return;
+    }
+
+  keymap_data = mmap (NULL, size, PROT_READ, MAP_SHARED, fd, 0);
+  if (keymap_data == MAP_FAILED)
+    {
+      g_critical (G_STRLOC ": Unable to map fd for keymap %s", g_strerror (errno));
+      close (fd);
+      return;
+    }
+
+  keymap = xkb_map_new_from_string (display->xkb_context,
+                                    keymap_data,
+                                    format,
+                                    0);
+
+  munmap (keymap_data, size);
+  close (fd);
+
+  gdk_keymap = _gdk_wayland_display_get_keymap (device->display);
+  _gdk_wayland_keymap_update_keymap (gdk_keymap, keymap);
 }
 
 static void

gdk/wayland/gdkdisplay-wayland.c

@@ -619,6 +619,8 @@ _gdk_wayland_display_init (GdkWaylandDisplay *display)
 {
   _gdk_wayland_display_manager_add_display (gdk_display_manager_get (),
 					    GDK_DISPLAY (display));
+
+  display->xkb_context = xkb_context_new (0);
 }
 
 static void

gdk/wayland/gdkdisplay-wayland.h

@@ -87,6 +87,8 @@ struct _GdkWaylandDisplay
 
   GSource *event_source;
 
+  struct xkb_context *xkb_context;
+
 #ifdef GDK_WAYLAND_USE_EGL
   EGLDisplay egl_display;
   EGLContext egl_context;

gdk/wayland/gdkkeys-wayland.c

@@ -49,6 +49,11 @@ struct _GdkWaylandKeymap
   GdkKeymap parent_instance;
   GdkModifierType modmap[8];
   struct xkb_desc *xkb;
+  struct xkb_keymap *keymap;
+  struct xkb_state *state;
+  xkb_mod_mask_t control_mask;
+  xkb_mod_mask_t alt_mask;
+  xkb_mod_mask_t shift_mask;
 };
 
 struct _GdkWaylandKeymapClass
@@ -661,6 +666,32 @@ _gdk_wayland_keymap_new (GdkDisplay *display)
   return GDK_KEYMAP (keymap);
 }
 
+void
+_gdk_wayland_keymap_update_keymap (GdkKeymap  *gdk_keymap,
+                                   struct xkb_keymap *xkb_keymap)
+{
+  GdkWaylandKeymap *keymap;
+
+  keymap = GDK_WAYLAND_KEYMAP (gdk_keymap);
+
+  if (keymap->keymap)
+    xkb_map_unref (keymap->keymap);
+
+  keymap->keymap = xkb_keymap;
+
+  if (keymap->state)
+    xkb_state_unref (keymap->state);
+
+  keymap->state = xkb_state_new (keymap->keymap);
+
+  keymap->control_mask =
+    1 << xkb_map_mod_get_index(keymap->keymap, "Control");
+  keymap->alt_mask =
+    1 << xkb_map_mod_get_index(keymap->keymap, "Mod1");
+  keymap->shift_mask =
+    1 << xkb_map_mod_get_index(keymap->keymap, "Shift");
+}
+
 struct xkb_desc *_gdk_wayland_keymap_get_xkb_desc (GdkKeymap *keymap)
 {
   return GDK_WAYLAND_KEYMAP (keymap)->xkb;

gdk/wayland/gdkprivate-wayland.h

@@ -33,6 +33,8 @@
 #include <gdk/gdkprivate.h>
 #include <gdk/wayland/gdkdisplay-wayland.h>
 
+#include <xkbcommon/xkbcommon.h>
+
 #include "gdkinternals.h"
 
 #include "config.h"
@@ -89,6 +91,8 @@ void _gdk_wayland_display_create_window_impl (GdkDisplay    *display,
 					      gint           attributes_mask);
 
 GdkKeymap *_gdk_wayland_display_get_keymap (GdkDisplay *display);
+void       _gdk_wayland_keymap_update_keymap (GdkKeymap  *gdk_keymap,
+                                              struct xkb_keymap *xkb_keymap);
 
 GdkWindow *_gdk_wayland_display_get_selection_owner (GdkDisplay *display,
 						 GdkAtom     selection);