Patch to set certain XKB options when an m17n IME is set.
Index: ibus-m17n-1.3.2/configure.ac
===================================================================
--- ibus-m17n-1.3.2.orig/configure.ac
+++ ibus-m17n-1.3.2/configure.ac
@@ -106,6 +106,14 @@ AC_CHECK_FUNCS([ibus_engine_get_surround
 CFLAGS="$save_CFLAGS"
 LIBS="$save_LIBS"
 
+# check libxklavier
+have_libxklavier=no
+PKG_CHECK_MODULES([LIBXKLAVIER], [libxklavier gdk-3.0 x11],
+  have_libxklavier=yes)
+if test x$have_libxklavier != xno; then
+  AC_DEFINE([HAVE_LIBXKLAVIER], [1], [Define if libxklavier is found])
+fi
+
 # define GETTEXT_* variables
 GETTEXT_PACKAGE=ibus-m17n
 AC_SUBST(GETTEXT_PACKAGE)
Index: ibus-m17n-1.3.2/src/Makefile.am
===================================================================
--- ibus-m17n-1.3.2.orig/src/Makefile.am
+++ ibus-m17n-1.3.2/src/Makefile.am
@@ -66,10 +66,15 @@ ibus_engine_m17n_SOURCES = \
 	engine.c \
 	engine.h \
 	$(NULL)
+ibus_engine_m17n_CFLAGS = \
+	@LIBXKLAVIER_CFLAGS@ \
+	$(AM_CFLAGS) \
+	$(NULL)
 ibus_engine_m17n_LDADD = \
 	libm17ncommon.a \
 	@IBUS_LIBS@ \
 	@M17N_LIBS@ \
+	@LIBXKLAVIER_LIBS@ \
 	$(NULL)
 
 if HAVE_GTK
Index: ibus-m17n-1.3.2/src/default.xml.in.in
===================================================================
--- ibus-m17n-1.3.2.orig/src/default.xml.in.in
+++ ibus-m17n-1.3.2/src/default.xml.in.in
@@ -12,19 +12,22 @@
 		<preedit-highlight>FALSE</preedit-highlight>
 	</engine>
 	<engine>
-		<name>m17n:bn:inscript</name>
+		<name>m17n:bn:inscript*</name>
 		<rank>2</rank>
 		<preedit-highlight>FALSE</preedit-highlight>
+		<xkb-options>lv3:ralt_switch</xkb-options>
 	</engine>
 	<engine>
-		<name>m17n:gu:inscript</name>
+		<name>m17n:gu:inscript*</name>
 		<rank>2</rank>
 		<preedit-highlight>FALSE</preedit-highlight>
+		<xkb-options>lv3:ralt_switch</xkb-options>
 	</engine>
 	<engine>
-		<name>m17n:hi:inscript</name>
+		<name>m17n:hi:inscript*</name>
 		<rank>2</rank>
 		<preedit-highlight>FALSE</preedit-highlight>
+		<xkb-options>lv3:ralt_switch</xkb-options>
 	</engine>
 	<engine>
 		<name>m17n:kn:kgp</name>
@@ -37,19 +40,22 @@
 		<preedit-highlight>FALSE</preedit-highlight>
 	</engine>
 	<engine>
-		<name>m17n:mai:inscript</name>
+		<name>m17n:mai:inscript*</name>
 		<rank>2</rank>
 		<preedit-highlight>FALSE</preedit-highlight>
+		<xkb-options>lv3:ralt_switch</xkb-options>
 	</engine>
 	<engine>
-		<name>m17n:ml:inscript</name>
+		<name>m17n:ml:inscript*</name>
 		<rank>2</rank>
 		<preedit-highlight>FALSE</preedit-highlight>
+		<xkb-options>lv3:ralt_switch</xkb-options>
 	</engine>
 	<engine>
-		<name>m17n:mr:inscript</name>
+		<name>m17n:mr:inscript*</name>
 		<rank>2</rank>
 		<preedit-highlight>FALSE</preedit-highlight>
+		<xkb-options>lv3:ralt_switch</xkb-options>
 	</engine>
 	<engine>
 		<name>m17n:ne:rom</name>
@@ -57,14 +63,16 @@
 		<preedit-highlight>FALSE</preedit-highlight>
 	</engine>
 	<engine>
-		<name>m17n:or:inscript</name>
+		<name>m17n:or:inscript*</name>
 		<rank>2</rank>
 		<preedit-highlight>FALSE</preedit-highlight>
+		<xkb-options>lv3:ralt_switch</xkb-options>
 	</engine>
 	<engine>
-		<name>m17n:pa:inscript</name>
+		<name>m17n:pa:inscript*</name>
 		<rank>2</rank>
 		<preedit-highlight>FALSE</preedit-highlight>
+		<xkb-options>lv3:ralt_switch</xkb-options>
 	</engine>
 	<engine>
 		<name>m17n:sa:harvard-kyoto</name>
@@ -72,14 +80,16 @@
 		<preedit-highlight>FALSE</preedit-highlight>
 	</engine>
 	<engine>
-		<name>m17n:sd:inscript</name>
+		<name>m17n:sd:inscript*</name>
 		<rank>2</rank>
 		<preedit-highlight>FALSE</preedit-highlight>
+		<xkb-options>lv3:ralt_switch</xkb-options>
 	</engine>
 	<engine>
 		<name>m17n:si:wijesekera</name>
 		<rank>2</rank>
 		<preedit-highlight>FALSE</preedit-highlight>
+		<xkb-options>lv3:ralt_switch</xkb-options>
 	</engine>
 	<engine>
 		<name>m17n:ta:tamil99</name>
@@ -87,9 +97,10 @@
 		<preedit-highlight>FALSE</preedit-highlight>
 	</engine>
 	<engine>
-		<name>m17n:te:inscript</name>
+		<name>m17n:te:inscript*</name>
 		<rank>2</rank>
 		<preedit-highlight>FALSE</preedit-highlight>
+		<xkb-options>lv3:ralt_switch</xkb-options>
 	</engine>
 	<!-- Samanala should have lower rank than other Sinhala
 	     engines since it is the only non-keyboard input method in
@@ -226,6 +237,7 @@
 		<name>m17n:si:*</name>
 		<rank>1</rank>
 		<preedit-highlight>FALSE</preedit-highlight>
+		<xkb-options>lv3:ralt_switch</xkb-options>
 	</engine>
 	<engine>
 		<name>m17n:ta:*</name>
Index: ibus-m17n-1.3.2/src/engine.c
===================================================================
--- ibus-m17n-1.3.2.orig/src/engine.c
+++ ibus-m17n-1.3.2/src/engine.c
@@ -6,6 +6,10 @@
 #include <ibus.h>
 #include <m17n.h>
 #include <string.h>
+#ifdef HAVE_LIBXKLAVIER
+#include <gdk/gdkx.h>
+#include <libxklavier/xklavier.h>
+#endif  /* HAVE_LIBXKLAVIER */
 #include "m17nutil.h"
 #include "engine.h"
 
@@ -38,6 +42,10 @@ struct _IBusM17NEngineClass {
     gboolean use_iok;
 
     MInputMethod *im;
+
+#if HAVE_LIBXKLAVIER
+    XklConfigRec *xkl_config_rec;
+#endif  /* HAVE_LIBXKLAVIER */
 };
 
 /* functions prototype */
@@ -105,12 +113,90 @@ static IBusEngineClass *parent_class = N
 
 static IBusConfig      *config = NULL;
 
+#if HAVE_LIBXKLAVIER
+static XklEngine       *xkl_engine = NULL;
+static XklConfigRec    *xkl_system_config_rec = NULL;
+
+static gboolean
+parse_xkb_options (XklConfigRec *config_rec, const gchar *xkb_options)
+{
+    gchar **strv;
+
+    strv = g_strsplit (xkb_options, ",", -1);
+    if (g_strv_length (strv) < 1) {
+        g_strfreev (strv);
+        return FALSE;
+    }
+
+    g_strfreev (config_rec->options);
+    config_rec->options = strv;
+
+    return TRUE;
+}
+
+static GdkFilterReturn
+filter_xkl_event (GdkXEvent *xev,
+                  GdkEvent  *event,
+                  gpointer   user_data)
+{
+    XEvent *xevent = (XEvent *)xev;
+
+    xkl_engine_filter_events (xkl_engine, xevent);
+    return GDK_FILTER_CONTINUE;
+}
+
+static void
+on_xkl_config_changed (XklEngine *xklengine,
+                       gpointer   user_data)
+{
+    IBusM17NEngineClass *klass = user_data;
+    XklConfigRec *config_rec;
+
+    config_rec = xkl_config_rec_new ();
+    if (!xkl_config_rec_get_from_server (config_rec, xkl_engine)) {
+        g_object_unref (config_rec);
+        g_warning ("Can't get default keyboard config from the server");
+    } else if (klass->xkl_config_rec &&
+               !xkl_config_rec_equals (config_rec, klass->xkl_config_rec)) {
+        if (xkl_system_config_rec)
+            g_object_unref (xkl_system_config_rec);
+        xkl_system_config_rec = config_rec;
+    }
+}
+#endif  /* HAVE_LIBXKLAVIER */
+
 void
 ibus_m17n_init (IBusBus *bus)
 {
+#if HAVE_LIBXKLAVIER
+    if (gdk_init_check (NULL, NULL)) {
+        GdkDisplay *display = gdk_display_get_default ();
+        g_assert (display);
+
+        xkl_engine = xkl_engine_get_instance (GDK_DISPLAY_XDISPLAY (display));
+        xkl_system_config_rec = xkl_config_rec_new ();
+        if (!xkl_config_rec_get_from_server (xkl_system_config_rec,
+                                             xkl_engine)) {
+            g_object_unref (xkl_system_config_rec);
+            xkl_system_config_rec = NULL;
+
+            g_warning ("Can't get default keyboard config from the server");
+        } else {
+            gdk_window_add_filter (NULL,
+                                   (GdkFilterFunc) filter_xkl_event,
+                                   NULL);
+            gdk_window_add_filter (gdk_get_default_root_window (),
+                                   (GdkFilterFunc) filter_xkl_event,
+                                   NULL);
+            xkl_engine_start_listen (xkl_engine, XKLL_TRACK_KEYBOARD_STATE);
+        }
+    }
+#endif  /* HAVE_LIBXKLAVIER */
+
     config = ibus_bus_get_config (bus);
     if (config)
         g_object_ref_sink (config);
+
     ibus_m17n_init_common ();
 }
 
@@ -299,6 +385,27 @@ ibus_m17n_engine_class_init (IBusM17NEng
                       G_CALLBACK(ibus_m17n_config_value_changed),
                       klass);
 
+#if HAVE_LIBXKLAVIER
+    if (engine_config->xkb_options) {
+        klass->xkl_config_rec = xkl_config_rec_new ();
+        if (!xkl_config_rec_get_from_server (klass->xkl_config_rec,
+                                             xkl_engine)) {
+            g_object_unref (klass->xkl_config_rec);
+	    klass->xkl_config_rec = NULL;
+            g_warning ("Can't get default keyboard config from the server");
+        } else if (!parse_xkb_options (klass->xkl_config_rec,
+                                       engine_config->xkb_options)) {
+            g_object_unref (klass->xkl_config_rec);
+	    klass->xkl_config_rec = NULL;
+            g_warning ("Can't parse xkb options %s",
+                       engine_config->xkb_options);
+        }
+    }
+
+    g_signal_connect (xkl_engine, "X-config-changed",
+                      G_CALLBACK(on_xkl_config_changed), klass);
+#endif  /* HAVE_LIBXKLAVIER */
+
     klass->im = NULL;
 }
 
@@ -499,6 +606,11 @@ ibus_m17n_engine_destroy (IBusM17NEngine
         m17n->context = NULL;
     }
 
+#if HAVE_LIBXKLAVIER
+    if (xkl_system_config_rec)
+        xkl_config_rec_activate (xkl_system_config_rec, xkl_engine);
+#endif  /* HAVE_LIBXKLAVIER */
+
     IBUS_OBJECT_CLASS (parent_class)->destroy ((IBusObject *)m17n);
 }
 
@@ -735,6 +847,19 @@ ibus_m17n_engine_enable (IBusEngine *eng
     ibus_engine_get_surrounding_text (engine, &text, &cursor_pos);
     g_object_unref (text);
 #endif  /* HAVE_IBUS_ENGINE_GET_SURROUNDING_TEXT */
+
+#if HAVE_LIBXKLAVIER
+    GObjectClass *object_class;
+    IBusM17NEngineClass *klass;
+
+    object_class = G_OBJECT_GET_CLASS (m17n);
+    klass = (IBusM17NEngineClass *) object_class;
+
+    if (klass->xkl_config_rec) {
+        if (!xkl_config_rec_activate (klass->xkl_config_rec, xkl_engine))
+            g_warning ("Can't set the XKB layout");
+    }
+#endif  /* HAVE_LIBXKLAVIER */
 }
 
 static void
@@ -744,6 +869,17 @@ ibus_m17n_engine_disable (IBusEngine *en
 
     ibus_m17n_engine_focus_out (engine);
     parent_class->disable (engine);
+
+#if HAVE_LIBXKLAVIER
+    GObjectClass *object_class;
+    IBusM17NEngineClass *klass;
+
+    object_class = G_OBJECT_GET_CLASS (m17n);
+    klass = (IBusM17NEngineClass *) object_class;
+
+    if (xkl_system_config_rec)
+        xkl_config_rec_activate (xkl_system_config_rec, xkl_engine);
+#endif  /* HAVE_LIBXKLAVIER */
 }
 
 static void
Index: ibus-m17n-1.3.2/src/m17nutil.c
===================================================================
--- ibus-m17n-1.3.2.orig/src/m17nutil.c
+++ ibus-m17n-1.3.2/src/m17nutil.c
@@ -290,6 +290,11 @@ ibus_m17n_engine_config_parse_xml_node (
                            sub_node->name, sub_node->text);
             continue;
         }
+        if (g_strcmp0 (sub_node->name, "xkb-options") == 0) {
+            g_free (cnode->config.xkb_options);
+            cnode->config.xkb_options = g_strdup (sub_node->text);
+            continue;
+        }
         g_warning ("<engine> element contains invalid element <%s>",
                    sub_node->name);
     }
Index: ibus-m17n-1.3.2/src/m17nutil.h
===================================================================
--- ibus-m17n-1.3.2.orig/src/m17nutil.h
+++ ibus-m17n-1.3.2/src/m17nutil.h
@@ -16,6 +16,9 @@ struct _IBusM17NEngineConfig {
 
     /* whether to highlight preedit */
     gboolean preedit_highlight;
+
+    /* keyboard options to which the engine switches when enabled */
+    char *xkb_options;
 };
 
 typedef struct _IBusM17NEngineConfig IBusM17NEngineConfig;