X-Git-Url: http://git.chise.org/gitweb/?a=blobdiff_plain;f=src%2Finput.c;h=43a413313678555af61085241010132e5911a910;hb=3801477931992ade4f61b96c3dae00b1a06c467e;hp=0cd4967763f88fff7fe2726a3920177bbf1ec7d1;hpb=e188b5ad4c56ea61779b6d6ac33b63ff3a0e6ceb;p=m17n%2Fm17n-lib.git

diff --git a/src/input.c b/src/input.c
index 0cd4967..43a4133 100644
--- a/src/input.c
+++ b/src/input.c
@@ -1,5 +1,5 @@
 /* input.c -- input method module.
-   Copyright (C) 2003, 2004, 2005
+   Copyright (C) 2003, 2004, 2005, 2006
      National Institute of Advanced Industrial Science and Technology (AIST)
      Registration Number H15PRO112
 
@@ -26,7 +26,7 @@
 
     An input method is an object to enable inputting various
     characters.  An input method is identified by a pair of symbols,
-    LANGUAGE and NAME.  This pair decides a input method driver of the
+    LANGUAGE and NAME.  This pair decides an input method driver of the
     input method.  An input method driver is a set of functions for
     handling the input method.  There are two kinds of input methods;
     internal one and foreign one.
@@ -34,26 +34,26 @@
     <ul>
     <li> Internal Input Method
 
-    An internal input method has non @c Mnil LANGUAGE, and the body is
+    An internal input method has non @c Mnil LANGUAGE, and its body is
     defined in the m17n database by the tag <Minput_method, LANGUAGE,
     NAME>.  For this kind of input methods, the m17n library uses two
     predefined input method drivers, one for CUI use and the other for
-    GUI use.  Those driver utilize the input processing engine
+    GUI use.  Those drivers utilize the input processing engine
     provided by the m17n library itself.  The m17n database may
-    provides an input method that is not only for a specific language.
-    The database uses @c Mt as LANGUAGE of such an input method.
+    provide input methods that are not limited to a specific language.
+    The database uses @c Mt as LANGUAGE of those input methods.
 
     An internal input method accepts an input key which is a symbol
     associated with an input event.  As there is no way for the @c
     m17n @c library to know how input events are represented in an
-    application program, an application programmer have to convert an
+    application program, an application programmer has to convert an
     input event to an input key by himself.  See the documentation of
     the function minput_event_to_key () for the detail.
 
     <li> Foreign Input Method
 
-    A foreign input method has @c Mnil LANGUAGE, and the body is
-    defined in an external resources (e.g. XIM of X Window System).
+    A foreign input method has @c Mnil LANGUAGE, and its body is
+    defined in an external resource (e.g. XIM of X Window System).
     For this kind of input methods, the symbol NAME must have a
     property of key @c Minput_driver, and the value must be a pointer
     to an input method driver.  Therefore, by preparing a proper
@@ -91,33 +91,35 @@
     <ul> 
     <li> ÆâÉôÆþÎϥ᥽¥Ã¥É
 
-    ÆâÉôÆþÎϥ᥽¥Ã¥É¤È¤Ï LANGUAGE ¤¬ @c Mnil °Ê³°¤Î¤â¤Î¤Ç¤¢¤ê¡¢¤½¤ÎËÜÂΤÏm17n ¥Ç¡¼¥¿¥Ù¡¼¥¹¤Ë
-    <Minput_method, LANGUAGE, NAME> 
-    ¤È¤¤¤¦¥¿¥°¤òÉÕ¤±¤ÆÄêµÁ¤µ¤ì¤Æ¤¤¤ë¡£
-    ¤³¤Î¼ï¤ÎÆþÎϥ᥽¥Ã¥É¤ËÂФ·¤Æ¡¢m17n ¥é¥¤¥Ö¥é¥ê¤Ç¤Ï
-    CUI ÍÑ¤È GUI ÍѤ½¤ì¤¾¤ì¤ÎÆþÎϥ᥽¥Ã¥É¥É¥é¥¤¥Ð¤ò¤¢¤é¤«¤¸¤áÄêµÁ¤·¤Æ¤¤¤ë¡£
-    ¤³¤ì¤é¤Î¥É¥é¥¤¥Ð¤Ï m17n ¥é¥¤¥Ö¥é¥ê¼«ÂΤÎÆþÎϽèÍý¥¨¥ó¥¸¥ó¤òÍøÍѤ¹¤ë¡£
-    m17n ¥Ç¡¼¥¿¥Ù¡¼¥¹¤Ë¤Ï¡¢ÆÃÄê¤Î¸À¸ìÀìÍѤǤʤ¤ÆþÎϥ᥽¥Ã¥É¤òÄêµÁ¤¹¤ë¤³¤È¤â¤Ç¤­¡¢
-    ¤½¤Î¤è¤¦¤ÊÆþÎϥ᥽¥Ã¥É¤Î LANGUAGE ¤Ï @c Mt ¤Ç¤¢¤ë¡£
-
-    ÆâÉôÆþÎϥ᥽¥Ã¥É¤Ï¡¢¥æ¡¼¥¶¤ÎÆþÎÏ¥¤¥Ù¥ó¥È¤ËÂбþ¤·¤¿¥·¥ó¥Ü¥ë¤Ç¤¢¤ëÆþÎÏ¥­¡¼¤ò¼õ¤±¼è¤ë¡£
-    @c m17n @c ¥é¥¤¥Ö¥é¥ê ¤ÏÆþÎÏ¥¤¥Ù¥ó¥È¤¬¥¢¥×¥ê¥±¡¼¥·¥ç¥ó¥×¥í¥°¥é¥à¤Ç¤É¤¦É½¸½¤µ¤ì¤Æ¤¤¤ë¤«¤òÃΤ뤳¤È¤¬¤Ç¤­¤Ê¤¤¤Î¤Ç¡¢
-    ÆþÎÏ¥¤¥Ù¥ó¥È¤«¤éÆþÎÏ¥­¡¼¤Ø¤ÎÊÑ´¹¤Ï¥¢¥×¥ê¥±¡¼¥·¥ç¥ó¥×¥í¥°¥é¥Þ¤ÎÀÕǤ¤Ç¹Ô¤ï¤Ê¤¯¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£
-    ¾ÜºÙ¤Ë¤Ä¤¤¤Æ¤Ï´Ø¿ô minput_event_to_key () ¤ÎÀâÌÀ¤ò»²¾È¡£
+    ÆâÉôÆþÎϥ᥽¥Ã¥É¤È¤Ï LANGUAGE ¤¬ @c Mnil °Ê³°¤Î¤â¤Î¤Ç¤¢¤ê¡¢¤½¤ÎËÜÂÎ
+    ¤Ïm17n ¥Ç¡¼¥¿¥Ù¡¼¥¹¤Ë<Minput_method, LANGUAGE, NAME> ¤È¤¤¤¦¥¿¥°¤òÉÕ
+    ¤±¤ÆÄêµÁ¤µ¤ì¤Æ¤¤¤ë¡£¤³¤Î¼ï¤ÎÆþÎϥ᥽¥Ã¥É¤ËÂФ·¤Æ¡¢m17n ¥é¥¤¥Ö¥é¥ê¤Ç
+    ¤ÏCUI ÍÑ¤È GUI ÍѤ½¤ì¤¾¤ì¤ÎÆþÎϥ᥽¥Ã¥É¥É¥é¥¤¥Ð¤ò¤¢¤é¤«¤¸¤áÄêµÁ¤·¤Æ
+    ¤¤¤ë¡£¤³¤ì¤é¤Î¥É¥é¥¤¥Ð¤Ï m17n ¥é¥¤¥Ö¥é¥ê¼«ÂΤÎÆþÎϽèÍý¥¨¥ó¥¸¥ó¤òÍø
+    ÍѤ¹¤ë¡£m17n ¥Ç¡¼¥¿¥Ù¡¼¥¹¤Ë¤Ï¡¢ÆÃÄê¤Î¸À¸ìÀìÍѤǤʤ¤ÆþÎϥ᥽¥Ã¥É¤òÄê
+    µÁ¤¹¤ë¤³¤È¤â¤Ç¤­¡¢¤½¤Î¤è¤¦¤ÊÆþÎϥ᥽¥Ã¥É¤Î LANGUAGE ¤Ï @c Mt ¤Ç¤¢¤ë¡£
+
+    ÆâÉôÆþÎϥ᥽¥Ã¥É¤Ï¡¢¥æ¡¼¥¶¤ÎÆþÎÏ¥¤¥Ù¥ó¥È¤ËÂбþ¤·¤¿¥·¥ó¥Ü¥ë¤Ç¤¢¤ëÆþ
+    ÎÏ¥­¡¼¤ò¼õ¤±¼è¤ë¡£@c m17n @c ¥é¥¤¥Ö¥é¥ê ¤ÏÆþÎÏ¥¤¥Ù¥ó¥È¤¬¥¢¥×¥ê¥±¡¼
+    ¥·¥ç¥ó¥×¥í¥°¥é¥à¤Ç¤É¤¦É½¸½¤µ¤ì¤Æ¤¤¤ë¤«¤òÃΤ뤳¤È¤¬¤Ç¤­¤Ê¤¤¤Î¤Ç¡¢Æþ
+    ÎÏ¥¤¥Ù¥ó¥È¤«¤éÆþÎÏ¥­¡¼¤Ø¤ÎÊÑ´¹¤Ï¥¢¥×¥ê¥±¡¼¥·¥ç¥ó¥×¥í¥°¥é¥Þ¤ÎÀÕǤ¤Ç
+    ¹Ô¤ï¤Ê¤¯¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£¾ÜºÙ¤Ë¤Ä¤¤¤Æ¤Ï´Ø¿ô minput_event_to_key () ¤Î
+    ÀâÌÀ¤ò»²¾È¡£
 
     <li> ³°ÉôÆþÎϥ᥽¥Ã¥É
 
-    ³°ÉôÆþÎϥ᥽¥Ã¥É¤È¤Ï LANGUAGE ¤¬ @c Mnil ¤Î¤â¤Î¤Ç¤¢¤ê¡¢¤½¤ÎËÜÂΤϳ°Éô¤Î¥ê¥½¡¼¥¹¤È¤·¤ÆÄêµÁ¤µ¤ì¤ë¡£
-    ¡Ê¤¿¤È¤¨¤ÐX Window System ¤ÎXIM ¤Ê¤É¡£) 
-    ¤³¤Î¼ï¤ÎÆþÎϥ᥽¥Ã¥É¤Ç¤Ï¡¢¥·¥ó¥Ü¥ë NAME ¤Ï@c Minput_driver 
-    ¤ò¥­¡¼¤È¤¹¤ë¥×¥í¥Ñ¥Æ¥£¤ò»ý¤Á¡¢¤½¤ÎÃͤÏÆþÎϥ᥽¥Ã¥É¥É¥é¥¤¥Ð¤Ø¤Î¥Ý¥¤¥ó¥¿¤Ç¤¢¤ë¡£
-    ¤³¤Î¤³¤È¤Ë¤è¤ê¡¢Å¬Àڤʥɥ饤¥Ð¤ò½àÈ÷¤¹¤ë¤³¤È¤Ë¤è¤Ã¤Æ¡¢¤¤¤«¤Ê¤ë¼ïÎà¤ÎÆþÎϥ᥽¥Ã¥É¤â
-    @c m17n @c ¥é¥¤¥Ö¥é¥ê ¤ÎÏÈÁȤÎÃæ¤Ç°·¤¦»ö¤¬¤Ç¤­¤ë¡£
+    ³°ÉôÆþÎϥ᥽¥Ã¥É¤È¤Ï LANGUAGE ¤¬ @c Mnil ¤Î¤â¤Î¤Ç¤¢¤ê¡¢¤½¤ÎËÜÂΤϳ°
+    Éô¤Î¥ê¥½¡¼¥¹¤È¤·¤ÆÄêµÁ¤µ¤ì¤ë¡£¡Ê¤¿¤È¤¨¤ÐX Window System ¤ÎXIM ¤Ê
+    ¤É¡£) ¤³¤Î¼ï¤ÎÆþÎϥ᥽¥Ã¥É¤Ç¤Ï¡¢¥·¥ó¥Ü¥ë NAME ¤Ï@c Minput_driver ¤ò
+    ¥­¡¼¤È¤¹¤ë¥×¥í¥Ñ¥Æ¥£¤ò»ý¤Á¡¢¤½¤ÎÃͤÏÆþÎϥ᥽¥Ã¥É¥É¥é¥¤¥Ð¤Ø¤Î¥Ý¥¤¥ó
+    ¥¿¤Ç¤¢¤ë¡£¤³¤Î¤³¤È¤Ë¤è¤ê¡¢Å¬Àڤʥɥ饤¥Ð¤ò½àÈ÷¤¹¤ë¤³¤È¤Ë¤è¤Ã¤Æ¡¢¤¤
+    ¤«¤Ê¤ë¼ïÎà¤ÎÆþÎϥ᥽¥Ã¥É¤â@c m17n @c ¥é¥¤¥Ö¥é¥ê ¤ÎÏÈÁȤÎÃæ¤Ç°·¤¦»ö
+    ¤¬¤Ç¤­¤ë¡£
 
-    ÍøÊØÀ­¤Î´ÑÅÀ¤«¤é¡¢m17n X ¥é¥¤¥Ö¥é¥ê¤Ï XIM ¤Î OverTheSpot 
-    ¤ÎÆþÎÏ¥¹¥¿¥¤¥ë¤ò¼Â¸½¤¹¤ëÆþÎϥ᥽¥Ã¥É¥É¥é¥¤¥Ð¤òÄ󶡤·¡¢¤Þ¤¿¥·¥ó¥Ü¥ë @c Mxim ¤Î 
-    @c Minput_driver ¥×¥í¥Ñ¥Æ¥£¤ÎÃͤȤ·¤Æ¤½¤Î¥É¥é¥¤¥Ð¤Ø¤Î¥Ý¥¤¥ó¥¿¤òÊÝ»ý¤·¤Æ¤¤¤ë¡£
-    ¾ÜºÙ¤Ë¤Ä¤¤¤Æ¤Ï m17n GUI API ¤Î¥É¥­¥å¥á¥ó¥È¤ò»²¾È¤Î¤³¤È¡£
+    ÍøÊØÀ­¤Î´ÑÅÀ¤«¤é¡¢m17n X ¥é¥¤¥Ö¥é¥ê¤Ï XIM ¤Î OverTheSpot ¤ÎÆþÎÏ¥¹¥¿
+    ¥¤¥ë¤ò¼Â¸½¤¹¤ëÆþÎϥ᥽¥Ã¥É¥É¥é¥¤¥Ð¤òÄ󶡤·¡¢¤Þ¤¿¥·¥ó¥Ü¥ë @c Mxim ¤Î
+    @c Minput_driver ¥×¥í¥Ñ¥Æ¥£¤ÎÃͤȤ·¤Æ¤½¤Î¥É¥é¥¤¥Ð¤Ø¤Î¥Ý¥¤¥ó¥¿¤òÊÝ»ý
+    ¤·¤Æ¤¤¤ë¡£¾ÜºÙ¤Ë¤Ä¤¤¤Æ¤Ï m17n GUI API ¤Î¥É¥­¥å¥á¥ó¥È¤ò»²¾È¤Î¤³¤È¡£
 
     </ul> 
 
@@ -143,6 +145,7 @@
 #include <dirent.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#include <time.h>
 
 #include "config.h"
 
@@ -162,6 +165,8 @@
 
 static int mdebug_mask = MDEBUG_INPUT;
 
+static int fully_initialized;
+
 static MSymbol Minput_method;
 
 /** Symbols to load an input method data.  */
@@ -173,7 +178,10 @@ static MSymbol Mselect, Mshow, Mhide, Mcommit, Munhandle;
 static MSymbol Mset, Madd, Msub, Mmul, Mdiv, Mequal, Mless, Mgreater;
 static MSymbol Mless_equal, Mgreater_equal;
 static MSymbol Mcond;
-static MSymbol Mplus, Mminus, Mstar, Mslush, Mand, Mor, Mnot;
+static MSymbol Mplus, Mminus, Mstar, Mslash, Mand, Mor, Mnot;
+
+/** Special action symbol.  */
+static MSymbol Mat_reload;
 
 static MSymbol M_candidates;
 
@@ -189,14 +197,16 @@ static MSymbol one_char_symbol[256];
 
 static MSymbol M_key_alias;
 
-static MSymbol M_description, M_command, M_variable;
+static MSymbol Mdescription, Mcommand, Mvariable, Mglobal, Mconfig;
+
+static MSymbol M_gettext;
 
 /** Structure to hold a map.  */
 
 struct MIMMap
 {
   /** List of actions to take when we reach the map.  In a root map,
-      the actions are executed only when there's no more key.  */
+      the actions are executed only when there is no more key.  */
   MPlist *map_actions;
 
   /** List of deeper maps.  If NULL, this is a terminal map.  */
@@ -231,209 +241,233 @@ struct MIMState
   MIMMap *map;
 };
 
-/* Lookup keys KEY1,2,3 in the nested plist PLIST, and return the
-   value.  */
-
-static MPlist *
-lookup_nested_list (MPlist *plist, MSymbol key1, MSymbol key2, MSymbol key3)
-{
-  MSymbol key[3];
-  int i;
-
-  key[0] = key1, key[1] = key2, key[2] = key3;
-  for (i = 0; i < 3; i++)
-    {
-      plist = mplist_find_by_value (plist, key[i]);
-      if (! plist)
-	return NULL;
-      plist = MPLIST_NEXT (plist);
-      plist = MPLIST_PLIST (plist);
-    }
-  return plist;
-}
+#define CUSTOM_FILE "config.mic"
 
-/* Set VAL for keys KEY1,2,3 in the nested plist PLIST.  */
+static MPlist *load_im_info_keys;
 
-static MPlist *
-set_nested_list (MPlist *plist, MSymbol key1, MSymbol key2, MSymbol key3,
-		 MPlist *val)
-{
-  MSymbol key[3];
-  int i;
-  MPlist *pl;
+/* List of input method information.  The format is:
+     (LANGUAGE NAME t:IM_INFO ... ... ...)  */
+static MPlist *im_info_list;
 
-  key[0] = key1, key[1] = key2, key[2] = key3;
-  for (i = 0; i < 3; i++)
-    {
-      pl = mplist_find_by_value (plist, key[i]);
-      if (pl)
-	{
-	  pl = MPLIST_NEXT (pl);
-	  plist = MPLIST_PLIST (pl);
-	}
-      else
-	{
-	  pl = mplist_add (plist, Msymbol, key[i]);
-	  plist = mplist ();
-	  pl = mplist_add (pl, Mplist, plist);
-	  M17N_OBJECT_UNREF (plist);
-	}
-    }
-  mplist_set (pl, Mplist, val);
-  M17N_OBJECT_UNREF (val);
-  return pl;
-}
+/* Database for user's customization file.  */
+static MDatabase *im_custom_mdb;
 
-/* Parse PLIST as a value of nested list and return an adjusted list.
-
-   PLIST has this form;
-     (symbol:command
-      plist:(symbol:KEY
-	     [ mtext:DESCRIPTION | symbol:nil ]
-	     ;; The remaining elements are checked CHECK_FUNC.
-	     ...)
-      plist:(symbol:KEY
-	     [ mtext:DESCRIPTION | symbol:nil ]
-	     ;; The remaining elements are checked CHECK_FUNC.
-	     ...)
-      ...)
+/* List of input method information loaded from im_custom_mdb.  The
+   format is the same as im_info_list.  */
+static MPlist *im_custom_list;
 
-   GLOBAL is a global list.  If a description text is missing, it is
-   extracted from GLOBAL.
+/* List of input method information configured by
+   minput_config_command and minput_config_variable.  The format is
+   the same as im_info_list.  */
+static MPlist *im_config_list;
 
-   The return value is a plist of this format:
-     (symbol:KEY
-      plist:([ mtext:DESCRIPTION | symbol:nil ]
-	     ...)
-      symbol:KEY
-      plist:([ mtext:DESCRIPTION | symbol:nil ]
-	     ...)
-      ...)
+/* Global input method information.  It points into the element of
+   im_info_list corresponding to LANGUAGE == `nil' and NAME ==
+   `global'.  */
+static MInputMethodInfo *global_info;
 
-   PLIST itself is unref-ed.  */
+static int update_global_info (void);
+static int update_custom_info (void);
+static MInputMethodInfo *get_im_info (MSymbol, MSymbol, MSymbol, MSymbol);
 
-static MPlist *
-parse_nested_list_value (MPlist *plist, MPlist *global, MSymbol key,
-			 int (*check_func) (MPlist *))
+
+void
+fully_initialize ()
 {
-  MPlist *val, *pl, *p, *p0;
+  char *key_names[32]
+    = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+	"BackSpace", "Tab", "Linefeed", "Clear", NULL, "Return", NULL, NULL,
+	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+	NULL, NULL, NULL, "Escape", NULL, NULL, NULL, NULL };
+  char buf[6], buf2[32];
+  int i, j;
+  /* Maximum case: C-M-a, C-M-A, M-Return, C-A-a, C-A-A, A-Return.  */
+  MSymbol alias[7];
 
-  val = mplist ();
-  if (! MPLIST_PLIST_P (plist))
+  M_key_alias = msymbol ("  key-alias");
+
+  buf[0] = 'C';
+  buf[1] = '-';
+  buf[3] = '\0';
+  for (i = 0, buf[2] = '@'; i < ' '; i++, buf[2]++)
     {
-      M17N_OBJECT_UNREF (plist);
-      return val;
+      one_char_symbol[i] = msymbol (buf);
+      if (key_names[i] || (buf[2] >= 'A' && buf[2] <= 'Z'))
+	{
+	  j = 0;
+	  alias[j++] = one_char_symbol[i];
+	  if (key_names[i])
+	    {
+	      /* Ex: `Escape' == `C-['  */
+	      alias[j++] = msymbol (key_names[i]);
+	    }
+	  if (buf[2] >= 'A' && buf[2] <= 'Z')
+	    {
+	      /* Ex: `C-a' == `C-A'  */
+	      buf[2] += 32;
+	      alias[j++] = msymbol (buf);
+	      buf[2] -= 32;
+	    }
+	  /* Establish cyclic alias chain.  */
+	  alias[j] = alias[0];
+	  while (--j >= 0)
+	    msymbol_put (alias[j], M_key_alias, alias[j + 1]);
+	}
     }
-  pl = MPLIST_PLIST (plist);
-  if (! MPLIST_SYMBOL_P (pl)
-      || MPLIST_SYMBOL (pl) != key)
+  buf[0] = 'S';
+  for (i = buf[2] = ' '; i < 127; i++, buf[2]++)
     {
-      M17N_OBJECT_UNREF (plist);
-      return val;
+      one_char_symbol[i] = msymbol (buf + 2);
+      if (i >= 'A' && i <= 'Z')
+	{
+	  /* Ex: `A' == `S-A' == `S-a'.  */
+	  alias[0] = alias[3] = one_char_symbol[i];
+	  alias[1] = msymbol (buf);
+	  buf[2] += 32;
+	  alias[2] = msymbol (buf);
+	  buf[2] -= 32;
+	  for (j = 0; j < 3; j++)
+	    msymbol_put (alias[j], M_key_alias, alias[j + 1]);
+	}
     }
+  buf[0] = 'C';
 
-  MPLIST_DO (pl, MPLIST_NEXT (pl))
-    {
-      MSymbol name;
-      MPlist *global_def = NULL;
+  alias[0] = alias[2] = one_char_symbol[127] = msymbol ("Delete");
+  alias[1] = msymbol ("C-?");
+  for (j = 0; j < 2; j++)
+    msymbol_put (alias[j], M_key_alias, alias[j + 1]);
 
-      if (! MPLIST_PLIST_P (pl))
-	continue;
-      p = MPLIST_PLIST (pl);
-      if (! MPLIST_SYMBOL_P (p))
-	continue;
-      name = MPLIST_SYMBOL (p);
-      p = MPLIST_NEXT (p);
-      if (MPLIST_TAIL_P (p))
+  buf[3] = '-';
+  buf[5] = '\0';
+  buf2[1] = '-';
+  for (i = 128, buf[4] = '@'; i < 160; i++, buf[4]++)
+    {
+      j = 0;
+      /* `C-M-a' == `C-A-a' */
+      buf[2] = 'M';
+      alias[j++] = one_char_symbol[i] = msymbol (buf);
+      buf[2] = 'A';
+      alias[j++] = msymbol (buf);
+      if (key_names[i - 128])
 	{
-	  if (! global)
-	    continue;
-	  global_def = mplist_find_by_value (global, name);
-	  if (! global_def)
-	    continue;
-	  global_def = MPLIST_PLIST (MPLIST_NEXT (global_def));
-	  mplist__conc (p, global_def);
+	  /* Ex: `M-Escape' == `A-Escape' == `C-M-['.  */
+	  buf2[0] = 'M';
+	  strcpy (buf2 + 2, key_names[i - 128]);
+	  alias[j++] = msymbol (buf2);
+	  buf2[0] = 'A';
+	  alias[j++] = msymbol (buf2);
 	}
-      p0 = MPLIST_NEXT (p);
-      if (MPLIST_TAIL_P (p0))
+      if (buf[4] >= 'A' && buf[4] <= 'Z')
 	{
-	  if (! global || global_def)
-	    continue;
-	  global_def = mplist_find_by_value (global, name);
-	  if (! global_def)
-	    continue;
-	  global_def = MPLIST_PLIST (MPLIST_NEXT (global_def));
-	  global_def = MPLIST_NEXT (global_def);
-	  if (MPLIST_TAIL_P (global_def))
-	    continue;
-	  mplist__conc (p0, global_def);
+	  /* Ex: `C-M-a' == `C-M-A'.  */
+	  buf[4] += 32;
+	  buf[2] = 'M';
+	  alias[j++] = msymbol (buf);
+	  buf[2] = 'A';
+	  alias[j++] = msymbol (buf);
+	  buf[4] -= 32;
 	}
-      if ((*check_func) (p0) < 0)
-	continue;
-      mplist_add (val, Msymbol, name);
-      mplist_add (val, Mplist, p);
+      /* Establish cyclic alias chain.  */
+      alias[j] = alias[0];
+      while (--j >= 0)
+	msymbol_put (alias[j], M_key_alias, alias[j + 1]);
+    }
+  for (i = 160, buf[4] = ' '; i < 256; i++, buf[4]++)
+    {
+      buf[2] = 'M';
+      alias[0] = alias[2] = one_char_symbol[i] = msymbol (buf + 2);
+      buf[2] = 'A';
+      alias[1] = msymbol (buf + 2);
+      for (j = 0; j < 2; j++)
+	msymbol_put (alias[j], M_key_alias, alias[j + 1]);
     }
 
-  M17N_OBJECT_UNREF (plist);
-  return val;
-}
+  alias[0] = alias[4] = one_char_symbol[255] = msymbol ("M-Delete");
+  alias[1] = msymbol ("A-Delete");
+  alias[2] = msymbol ("C-M-?");
+  alias[3] = msymbol ("C-A-?");
+  for (j = 0; j < 4; j++)
+    msymbol_put (alias[j], M_key_alias, alias[j + 1]);
+
+  Minput_method = msymbol ("input-method");
+  Mtitle = msymbol ("title");
+  Mmacro = msymbol ("macro");
+  Mmodule = msymbol ("module");
+  Mmap = msymbol ("map");
+  Mstate = msymbol ("state");
+  Minclude = msymbol ("include");
+  Minsert = msymbol ("insert");
+  M_candidates = msymbol ("  candidates");
+  Mdelete = msymbol ("delete");
+  Mmove = msymbol ("move");
+  Mmark = msymbol ("mark");
+  Mpushback = msymbol ("pushback");
+  Mundo = msymbol ("undo");
+  Mcall = msymbol ("call");
+  Mshift = msymbol ("shift");
+  Mselect = msymbol ("select");
+  Mshow = msymbol ("show");
+  Mhide = msymbol ("hide");
+  Mcommit = msymbol ("commit");
+  Munhandle = msymbol ("unhandle");
+  Mset = msymbol ("set");
+  Madd = msymbol ("add");
+  Msub = msymbol ("sub");
+  Mmul = msymbol ("mul");
+  Mdiv = msymbol ("div");
+  Mequal = msymbol ("=");
+  Mless = msymbol ("<");
+  Mgreater = msymbol (">");
+  Mless_equal = msymbol ("<=");
+  Mgreater_equal = msymbol (">=");
+  Mcond = msymbol ("cond");
+  Mplus = msymbol ("+");
+  Mminus = msymbol ("-");
+  Mstar = msymbol ("*");
+  Mslash = msymbol ("/");
+  Mand = msymbol ("&");
+  Mor = msymbol ("|");
+  Mnot = msymbol ("!");
 
-static MPlist *variable_list, *command_list;
-static int check_variable_list (MPlist *plist);
-static int check_command_list (MPlist *plist);
-static MPlist *load_partial_im_info (MSymbol language, MSymbol name,
-				     MSymbol extra, MSymbol key);
+  Mat_reload = msymbol ("@reload");
 
-static MPlist *
-get_nested_list (MSymbol language, MSymbol name, MSymbol extra, MSymbol key)
-{
-  MPlist *total_list;
-  int (*check_func) (MPlist *);
-  MPlist *plist, *global;
+  Mcandidates_group_size = msymbol ("candidates-group-size");
+  Mcandidates_charset = msymbol ("candidates-charset");
 
-  if (key == M_variable)
-    {
-      if (! variable_list)
-	variable_list = mplist ();
-      total_list = variable_list;
-      check_func = check_variable_list;
-    }
-  else
-    {
-      if (! command_list)
-	command_list = mplist ();
-      total_list = command_list;
-      check_func = check_command_list;
-    }
+  Mcandidate_list = msymbol_as_managing_key ("  candidate-list");
+  Mcandidate_index = msymbol ("  candidate-index");
 
-  if (MPLIST_TAIL_P (total_list))
-    {
-      plist = load_partial_im_info (Mt, Mnil, key, key);
-      if (plist)
-	global = parse_nested_list_value (plist, NULL, key, check_func);
-      else
-	global = mplist ();
-      set_nested_list (total_list, Mt, Mnil, key, global);
-    }
-  else
-    global = lookup_nested_list (total_list, Mt, Mnil, key);
+  Minit = msymbol ("init");
+  Mfini = msymbol ("fini");
 
-  if (name == Mnil)
-    return global;
+  Mdescription = msymbol ("description");
+  Mcommand = msymbol ("command");
+  Mvariable = msymbol ("variable");
+  Mglobal = msymbol ("global");
+  Mconfig = msymbol ("config");
+  M_gettext = msymbol ("_");
 
-  plist = lookup_nested_list (total_list, language, name, extra);
-  if (plist)
-    return plist;
+  load_im_info_keys = mplist ();
+  mplist_add (load_im_info_keys, Mstate, Mnil);
+  mplist_push (load_im_info_keys, Mmap, Mnil);
 
-  plist = load_partial_im_info (language, name, extra, key);
-  if (plist)
-    plist = parse_nested_list_value (plist, global, key, check_func);
-  else
-    plist = mplist ();
-  set_nested_list (total_list, language, name, extra, plist);
-  return plist;
+  im_info_list = mplist ();
+  im_config_list = im_custom_list = NULL;
+  im_custom_mdb = NULL;
+  update_custom_info ();
+  global_info = NULL;
+  update_global_info ();
+
+  fully_initialized = 1;
 }
 
+#define MINPUT__INIT()		\
+  do {				\
+    if (! fully_initialized)	\
+      fully_initialize ();	\
+  } while (0)
+
+
 static int
 marker_code (MSymbol sym)
 {
@@ -456,21 +490,20 @@ marker_code (MSymbol sym)
 static MPlist *
 resolve_variable (MInputContextInfo *ic_info, MSymbol var)
 {
-  MPlist *p;
+  MPlist *plist = mplist__assq (ic_info->vars, var);
 
-  MPLIST_DO (p, ic_info->vars)
-    {
-      if (MPLIST_SYMBOL (p) == var)
-	break;
-      p = MPLIST_NEXT (p);
-    }
-  if (MPLIST_TAIL_P (p))
+  if (plist)
     {
-      p = ic_info->vars;
-      mplist_push (p, Minteger, (void *) 0);
-      mplist_push (p, Msymbol, var);
+      plist = MPLIST_PLIST (plist);
+      return MPLIST_NEXT (plist);
     }
-  return (MPLIST_NEXT (p));
+
+  plist = mplist ();
+  mplist_push (ic_info->vars, Mplist, plist);
+  M17N_OBJECT_UNREF (plist);
+  plist = mplist_add (plist, Msymbol, var);
+  plist = mplist_add (plist, Minteger, (void *) 0);
+  return plist;
 }
 
 static MText *
@@ -479,12 +512,10 @@ get_surrounding_text (MInputContext *ic, int len)
   MText *mt = NULL;
 
   mplist_push (ic->plist, Minteger, (void *) len);
-  minput__callback (ic, Minput_get_surrounding_text);
-  if (MPLIST_MTEXT_P (ic->plist))
-    {
-      mt = MPLIST_MTEXT (ic->plist);
-      mplist_pop (ic->plist);
-    }
+  if (minput__callback (ic, Minput_get_surrounding_text) >= 0
+      && MPLIST_MTEXT_P (ic->plist))
+    mt = MPLIST_MTEXT (ic->plist);
+  mplist_pop (ic->plist);
   return mt;
 }
 
@@ -517,7 +548,7 @@ get_preceding_char (MInputContext *ic, int pos)
     }
   mt = get_surrounding_text (ic, - pos);
   if (! mt)
-    return -1;
+    return -2;
   len = mtext_nchars (mt);
   if (ic_info->preceding_text)
     {
@@ -549,7 +580,7 @@ get_following_char (MInputContext *ic, int pos)
     }
   mt = get_surrounding_text (ic, pos);
   if (! mt)
-    return -1;
+    return -2;
   len = mtext_nchars (mt);
   if (ic_info->following_text)
     {
@@ -634,7 +665,7 @@ parse_expression (MPlist *plist)
     return -1;
   plist = MPLIST_PLIST (plist);
   op = MPLIST_SYMBOL (plist);
-  if (op != Mplus && op != Mminus && op != Mstar && op != Mslush
+  if (op != Mplus && op != Mminus && op != Mstar && op != Mslash
       && op != Mand && op != Mor && op != Mnot
       && op != Mless && op != Mgreater && op != Mequal
       && op != Mless_equal && op != Mgreater_equal)
@@ -659,7 +690,7 @@ resolve_expression (MInputContext *ic, MPlist *plist)
     return 0;
   plist = MPLIST_PLIST (plist);
   if (! MPLIST_SYMBOL_P (plist))
-    return val;
+    return 0;
   op = MPLIST_SYMBOL (plist);
   plist = MPLIST_NEXT (plist);
   val = resolve_expression (ic, plist);
@@ -672,7 +703,7 @@ resolve_expression (MInputContext *ic, MPlist *plist)
   else if (op == Mstar)
     MPLIST_DO (plist, MPLIST_NEXT (plist))
       val *= resolve_expression (ic, plist);
-  else if (op == Mslush)
+  else if (op == Mslash)
     MPLIST_DO (plist, MPLIST_NEXT (plist))
       val /= resolve_expression (ic, plist);
   else if (op == Mand)
@@ -865,7 +896,7 @@ parse_action_list (MPlist *plist, MPlist *macros)
 	  else if (! macros || ! mplist_get (macros, action_name))
 	    MERROR (MERROR_IM, -1);
 	}
-      else
+      else if (! MPLIST_SYMBOL_P (plist))
 	MERROR (MERROR_IM, -1);
     }
 
@@ -873,24 +904,16 @@ parse_action_list (MPlist *plist, MPlist *macros)
 }
 
 static MPlist *
-resolve_command (MSymbol language, MSymbol name, MSymbol command)
+resolve_command (MPlist *cmds, MSymbol command)
 {
-  MPlist *plist = get_nested_list (language, name, Mnil, M_command);
+  MPlist *plist;
 
-  if (! plist)
-    MERROR (MERROR_IM, NULL);
-  MPLIST_DO (plist, plist)
-    {
-      if (MPLIST_SYMBOL (plist) == command)
-	break;
-      plist = MPLIST_NEXT (plist);
-    }
-  if (MPLIST_TAIL_P (plist))
-    MERROR (MERROR_IM, NULL);
-  plist = MPLIST_NEXT (plist);  
-  if (! MPLIST_PLIST_P (plist))
-    MERROR (MERROR_IM, NULL);
-  plist = MPLIST_NEXT (MPLIST_PLIST (plist));
+  if (! cmds || ! (plist = mplist__assq (cmds, command)))
+    return NULL;
+  plist = MPLIST_PLIST (plist);	/* (NAME DESC STATUS [KEYSEQ ...]) */
+  plist = MPLIST_NEXT (plist);
+  plist = MPLIST_NEXT (plist);
+  plist = MPLIST_NEXT (plist);
   return plist;
 }
 
@@ -910,19 +933,22 @@ load_translation (MIMMap *map, MPlist *keylist, MPlist *map_actions,
       MText *mt = MPLIST_MTEXT (keylist);
 
       len = mtext_nchars (mt);
-      if (len == 0 || len != mtext_nbytes (mt))
-	MERROR (MERROR_IM, -1);
+      if (MFAILP (len > 0 && len == mtext_nbytes (mt)))
+	return -1;
       keyseq = (MSymbol *) alloca (sizeof (MSymbol) * len);
       for (i = 0; i < len; i++)
 	keyseq[i] = one_char_symbol[MTEXT_DATA (mt)[i]];
     }
-  else if (MPLIST_PLIST_P (keylist))
+  else
     {
-      MPlist *elt = MPLIST_PLIST (keylist);
+      MPlist *elt;
 	  
+      if (MFAILP (MPLIST_PLIST_P (keylist)))
+	return -1;
+      elt = MPLIST_PLIST (keylist);
       len = MPLIST_LENGTH (elt);
-      if (len == 0)
-	MERROR (MERROR_IM, -1);
+      if (MFAILP (len > 0))
+	return -1;
       keyseq = (MSymbol *) alloca (sizeof (int) * len);
       for (i = 0; i < len; i++, elt = MPLIST_NEXT (elt))
 	{
@@ -930,18 +956,18 @@ load_translation (MIMMap *map, MPlist *keylist, MPlist *map_actions,
 	    {
 	      int c = MPLIST_INTEGER (elt);
 
-	      if (c < 0 || c >= 0x100)
-		MERROR (MERROR_IM, -1);
+	      if (MFAILP (c >= 0 && c < 0x100))
+		return -1;
 	      keyseq[i] = one_char_symbol[c];
 	    }
-	  else if (MPLIST_SYMBOL_P (elt))
-	    keyseq[i] = MPLIST_SYMBOL (elt);
 	  else
-	    MERROR (MERROR_IM, -1);
+	    {
+	      if (MFAILP (MPLIST_SYMBOL_P (elt)))
+		return -1;
+	      keyseq[i] = MPLIST_SYMBOL (elt);
+	    }
 	}
     }
-  else
-    MERROR (MERROR_IM, -1);
 
   for (i = 0; i < len; i++)
     {
@@ -982,25 +1008,22 @@ load_translation (MIMMap *map, MPlist *keylist, MPlist *map_actions,
 }
 
 /* Load a branch from PLIST into MAP.  PLIST has this form:
-      PLIST ::= ( MAP-NAME BRANCH-ACTION * )
-   MAPS is a plist of raw maps.
-   STATE is the current state.  */
+      PLIST ::= ( MAP-NAME BRANCH-ACTION * )  */
 
 static int
-load_branch (MPlist *plist, MPlist *maps, MIMMap *map,
-	     MSymbol language, MSymbol name, MPlist *macros)
+load_branch (MInputMethodInfo *im_info, MPlist *plist, MIMMap *map)
 {
   MSymbol map_name;
   MPlist *branch_actions;
 
-  if (! MPLIST_SYMBOL_P (plist))
-    MERROR (MERROR_IM, -1);
+  if (MFAILP (MPLIST_SYMBOL_P (plist)))
+    return -1;
   map_name = MPLIST_SYMBOL (plist);
   plist = MPLIST_NEXT (plist);
   if (MPLIST_TAIL_P (plist))
     branch_actions = NULL;
-  else if (parse_action_list (plist, macros) < 0)
-    MERROR (MERROR_IM, -1);
+  else if (MFAILP (parse_action_list (plist, im_info->macros) >= 0))
+    return -1;
   else
     branch_actions = plist;
   if (map_name == Mnil)
@@ -1015,7 +1038,8 @@ load_branch (MPlist *plist, MPlist *maps, MIMMap *map,
       if (branch_actions)
 	M17N_OBJECT_REF (branch_actions);
     }
-  else if ((plist = (MPlist *) mplist_get (maps, map_name)))
+  else if (im_info->maps
+	   && (plist = (MPlist *) mplist_get (im_info->maps, map_name)))
     {
       MPLIST_DO (plist, plist)
 	{
@@ -1028,53 +1052,58 @@ load_branch (MPlist *plist, MPlist *maps, MIMMap *map,
 	  if (MPLIST_SYMBOL_P (keylist))
 	    {
 	      MSymbol command = MPLIST_SYMBOL (keylist);
-	      MPlist *pl = resolve_command (language, name, command);
+	      MPlist *pl;
 
-	      if (! pl)
-		return -1;
+	      if (MFAILP (command != Mat_reload))
+		continue;
+	      pl = resolve_command (im_info->configured_cmds, command);
+	      if (MFAILP (pl))
+		continue;
 	      MPLIST_DO (pl, pl)
-		if (load_translation (map, pl, map_actions, branch_actions,
-				      macros) < 0)
-		  MERROR (MERROR_IM, -1);
+		load_translation (map, pl, map_actions, branch_actions,
+				  im_info->macros);
 	    }
 	  else
-	    if (load_translation (map, keylist, map_actions, branch_actions,
-				  macros) < 0)
-	      MERROR (MERROR_IM, -1);
+	    load_translation (map, keylist, map_actions, branch_actions,
+			      im_info->macros);
 	}
     }
 
   return 0;
 }
 
-/* Load a macro from PLIST into MACROS.
+/* Load a macro from PLIST into IM_INFO->macros.
    PLIST has this from:
       PLIST ::= ( MACRO-NAME ACTION * )
-   MACROS is a plist of macro names vs action list.  */
+   IM_INFO->macros is a plist of macro names vs action list.  */
+
 static int
-load_macros (MPlist *plist, MPlist *macros)
+load_macros (MInputMethodInfo *im_info, MPlist *plist)
 {
   MSymbol name; 
+  MPlist *pl;
 
   if (! MPLIST_SYMBOL_P (plist))
     MERROR (MERROR_IM, -1);
   name = MPLIST_SYMBOL (plist);
   plist = MPLIST_NEXT (plist);
   if (MPLIST_TAIL_P (plist)
-      || parse_action_list (plist, macros) < 0)
+      || parse_action_list (plist, im_info->macros) < 0)
     MERROR (MERROR_IM, -1);
-  mplist_put (macros, name, plist);
+  pl = mplist_get (im_info->macros, name);
+  M17N_OBJECT_UNREF (pl);
+  mplist_put (im_info->macros, name, plist);
   M17N_OBJECT_REF (plist);
   return 0;
 }
 
-/* Load an external module from PLIST into EXTERNALS.
+/* Load an external module from PLIST into IM_INFO->externals.
    PLIST has this form:
       PLIST ::= ( MODULE-NAME FUNCTION * )
-   EXTERNALS is a plist of MODULE-NAME vs (MIMExternalModule *).  */
+   IM_INFO->externals is a plist of MODULE-NAME vs (MIMExternalModule *).  */
 
 static int
-load_external_module (MPlist *plist, MPlist *externals)
+load_external_module (MInputMethodInfo *im_info, MPlist *plist)
 {
   void *handle;
   MSymbol module;
@@ -1092,10 +1121,10 @@ load_external_module (MPlist *plist, MPlist *externals)
   sprintf (module_file, "%s%s", MSYMBOL_NAME (module), DLOPEN_SHLIB_EXT);
 
   handle = dlopen (module_file, RTLD_NOW);
-  if (! handle)
+  if (MFAILP (handle))
     {
       fprintf (stderr, "%s\n", dlerror ());
-      MERROR (MERROR_IM, -1);
+      return -1;
     }
   func_list = mplist ();
   MPLIST_DO (plist, MPLIST_NEXT (plist))
@@ -1103,15 +1132,15 @@ load_external_module (MPlist *plist, MPlist *externals)
       if (! MPLIST_SYMBOL_P (plist))
 	MERROR_GOTO (MERROR_IM, err_label);
       func = dlsym (handle, MSYMBOL_NAME (MPLIST_SYMBOL (plist)));
-      if (! func)
-	MERROR_GOTO (MERROR_IM, err_label);
+      if (MFAILP (func))
+	goto err_label;
       mplist_add (func_list, MPLIST_SYMBOL (plist), func);
     }
 
   MSTRUCT_MALLOC (external, MERROR_IM);
   external->handle = handle;
   external->func_list = func_list;
-  mplist_add (externals, module, external);
+  mplist_add (im_info->externals, module, external);
   return 0;
 
  err_label:
@@ -1142,8 +1171,7 @@ free_state (void *object)
 {
   MIMState *state = object;
 
-  if (state->title)
-    M17N_OBJECT_UNREF (state->title);
+  M17N_OBJECT_UNREF (state->title);
   if (state->map)
     free_map (state->map, 1);
   free (state);
@@ -1153,17 +1181,15 @@ free_state (void *object)
     PLIST has this form:
       PLIST ::= ( STATE-NAME STATE-TITLE ? BRANCH * )
       BRANCH ::= ( MAP-NAME BRANCH-ACTION * )
-   MAPS is a plist of defined maps.
    Return the state object.  */
 
 static MIMState *
-load_state (MPlist *plist, MPlist *maps, MSymbol language, MSymbol name,
-	    MPlist *macros)
+load_state (MInputMethodInfo *im_info, MPlist *plist)
 {
   MIMState *state;
 
-  if (! MPLIST_SYMBOL_P (plist))
-    MERROR (MERROR_IM, NULL);
+  if (MFAILP (MPLIST_SYMBOL_P (plist)))
+    return NULL;
   M17N_OBJECT (state, free_state, MERROR_IM);
   state->name = MPLIST_SYMBOL (plist);
   plist = MPLIST_NEXT (plist);
@@ -1171,29 +1197,62 @@ load_state (MPlist *plist, MPlist *maps, MSymbol language, MSymbol name,
     {
       state->title = MPLIST_MTEXT (plist);
       mtext_put_prop (state->title, 0, mtext_nchars (state->title),
-		      Mlanguage, language);
+		      Mlanguage, im_info->language);
       M17N_OBJECT_REF (state->title);
       plist = MPLIST_NEXT (plist);
     }
   MSTRUCT_CALLOC (state->map, MERROR_IM);
   MPLIST_DO (plist, plist)
-    if (! MPLIST_PLIST_P (plist)
-	|| load_branch (MPLIST_PLIST (plist), maps, state->map, language, name,
-			macros) < 0)
-      MERROR (MERROR_IM, NULL);
+    {
+      if (MFAILP (MPLIST_PLIST_P (plist)))
+	continue;
+      load_branch (im_info, MPLIST_PLIST (plist), state->map);
+    }
   return state;
 }
 
+/* Return a newly created IM_INFO for an input method specified by
+   LANUAGE, NAME, and EXTRA.  IM_INFO is stored in PLIST.  */
 
-static MPlist *im_info_list;
+static MInputMethodInfo *
+new_im_info (MDatabase *mdb, MSymbol language, MSymbol name, MSymbol extra,
+	     MPlist *plist)
+{
+  MInputMethodInfo *im_info;
+  MPlist *elt;
+
+  if (name == Mnil && extra == Mnil)
+    language = Mt, extra = Mglobal;
+  MSTRUCT_CALLOC (im_info, MERROR_IM);
+  im_info->mdb = mdb;
+  im_info->language = language;
+  im_info->name = name;
+  im_info->extra = extra;
+
+  elt = mplist ();
+  mplist_add (plist, Mplist, elt);
+  M17N_OBJECT_UNREF (elt);
+  elt = mplist_add (elt, Msymbol, language);
+  elt = mplist_add (elt, Msymbol, name);
+  elt = mplist_add (elt, Msymbol, extra);
+  mplist_add (elt, Mt, im_info);
+
+  return im_info;
+}
 
 static void
-free_im_info (MInputMethodInfo *im_info)
+fini_im_info (MInputMethodInfo *im_info)
 {
   MPlist *plist;
 
-  if (im_info->title)
-    M17N_OBJECT_UNREF (im_info->title);
+  M17N_OBJECT_UNREF (im_info->cmds);
+  M17N_OBJECT_UNREF (im_info->configured_cmds);
+  M17N_OBJECT_UNREF (im_info->bc_cmds);
+  M17N_OBJECT_UNREF (im_info->vars);
+  M17N_OBJECT_UNREF (im_info->configured_vars);
+  M17N_OBJECT_UNREF (im_info->bc_vars);
+  M17N_OBJECT_UNREF (im_info->description);
+  M17N_OBJECT_UNREF (im_info->title);
   if (im_info->states)
     {
       MPLIST_DO (plist, im_info->states)
@@ -1236,2642 +1295,4393 @@ free_im_info (MInputMethodInfo *im_info)
       M17N_OBJECT_UNREF (im_info->maps);
     }
 
-  free (im_info);
+  im_info->tick = 0;
 }
 
-static MInputMethodInfo *get_im_info (MSymbol language, MSymbol name,
-				      MSymbol extra);
+static void
+free_im_info (MInputMethodInfo *im_info)
+{
+  fini_im_info (im_info);
+  free (im_info);
+}
 
-static MInputMethodInfo *
-get_im_info_by_tags (MPlist *plist)
+static void
+free_im_list (MPlist *plist)
 {
-  MSymbol tag[3];
-  int i;
+  MPlist *pl, *elt;
 
-  for (i = 0; i < 3 && MPLIST_SYMBOL_P (plist);
-       i++, plist = MPLIST_NEXT (plist))
-    tag[i] = MPLIST_SYMBOL (plist);
-  if (i < 2)
-    return NULL;
-  for (; i < 3; i++)
-    tag[i] = Mnil;
-  return get_im_info (tag[0], tag[1], tag[2]);
-}
+  MPLIST_DO (pl, plist)
+    {
+      MInputMethodInfo *im_info;
 
-/* Load an input method from PLIST into IM_INTO, and return it.  */
+      elt = MPLIST_NEXT (MPLIST_NEXT (MPLIST_NEXT (MPLIST_PLIST (pl))));
+      im_info = MPLIST_VAL (elt);
+      free_im_info (im_info);
+    }
+  M17N_OBJECT_UNREF (plist);
+}
 
 static MInputMethodInfo *
-load_im_info (MSymbol language, MSymbol name, MPlist *plist)
+lookup_im_info (MPlist *plist, MSymbol language, MSymbol name, MSymbol extra)
 {
-  MInputMethodInfo *im_info;
-  MText *title = NULL;
-  MPlist *maps = NULL;
-  MPlist *states = NULL;
-  MPlist *externals = NULL;
-  MPlist *macros = NULL;
-  MPlist *elt;
-
-  MSTRUCT_CALLOC (im_info, MERROR_IM);
-
-  while (MPLIST_PLIST_P (plist))
+  if (name == Mnil && extra == Mnil)
+    language = Mt, extra = Mglobal;
+  while ((plist = mplist__assq (plist, language)))
     {
-      elt = MPLIST_PLIST (plist);
-      if (! MPLIST_SYMBOL_P (elt))
-	MERROR_GOTO (MERROR_IM, err);
-      if (MPLIST_SYMBOL (elt) == Mtitle)
-	{
-	  elt = MPLIST_NEXT (elt);
-	  if (! MPLIST_MTEXT_P (elt))
-	    MERROR_GOTO (MERROR_IM, err);
-	  im_info->title = title = MPLIST_MTEXT (elt);
-	  M17N_OBJECT_REF (title);
-	}
-      else if (MPLIST_SYMBOL (elt) == Mmap)
-	{
-	  MPlist *pl = mplist__from_alist (MPLIST_NEXT (elt));
-
-	  if (! pl)
-	    MERROR_GOTO (MERROR_IM, err);
-	  if (! maps)
-	    im_info->maps = maps = pl;
-	  else
-	    maps = mplist__conc (maps, pl);
-	}
-      else if (MPLIST_SYMBOL (elt) == Mmacro)
-	{
-	  if (! macros)
-	    im_info->macros = macros = mplist ();
-	  MPLIST_DO (elt, MPLIST_NEXT (elt))
-	    {
-	      if (! MPLIST_PLIST_P (elt)
-		  || load_macros (MPLIST_PLIST (elt), macros) < 0)
-		MERROR_GOTO (MERROR_IM, err);
-	    }
-	}
-      else if (MPLIST_SYMBOL (elt) == Mmodule)
-	{
-	  if (! externals)
-	    im_info->externals = externals = mplist ();
-	  MPLIST_DO (elt, MPLIST_NEXT (elt))
-	    {
-	      if (! MPLIST_PLIST_P (elt)
-		  || load_external_module (MPLIST_PLIST (elt), externals) < 0)
-		MERROR_GOTO (MERROR_IM, err);
-	    }
-	}
-      else if (MPLIST_SYMBOL (elt) == Mstate)
-	{
-	  MPLIST_DO (elt, MPLIST_NEXT (elt))
-	    {
-	      MIMState *state;
-
-	      if (! MPLIST_PLIST_P (elt))
-		MERROR_GOTO (MERROR_IM, err);
-	      state = load_state (MPLIST_PLIST (elt), maps, language, name,
-				  macros);
-	      if (! state)
-		MERROR_GOTO (MERROR_IM, err);
-	      if (! states)
-		im_info->states = states = mplist ();
-	      mplist_put (states, state->name, state);
-	    }
-	}
-      else if (MPLIST_SYMBOL (elt) == Minclude)
-	{
-	  /* elt ::= include (tag1 tag2 ...) key item ... */
-	  MSymbol key;
-	  MInputMethodInfo *temp;
-	  MPlist *pl, *p;
-
-	  elt = MPLIST_NEXT (elt);
-	  if (! MPLIST_PLIST_P (elt))
-	    MERROR_GOTO (MERROR_IM, err);
-	  temp = get_im_info_by_tags (MPLIST_PLIST (elt));
-	  if (! temp)
-	    MERROR_GOTO (MERROR_IM, err);
-	  elt = MPLIST_NEXT (elt);
-	  if (! MPLIST_SYMBOL_P (elt))
-	    MERROR_GOTO (MERROR_IM, err);
-	  key = MPLIST_SYMBOL (elt);
-	  elt = MPLIST_NEXT (elt);
-	  if (key == Mmap)
-	    {
-	      if (! maps)
-		im_info->maps = maps = mplist ();
-	      MPLIST_DO (pl, temp->maps)
-		{
-		  p = MPLIST_VAL (pl);
-		  MPLIST_ADD_PLIST (maps, MPLIST_KEY (pl), p);
-		  M17N_OBJECT_REF (p);
-		}
-	    }
-	  else if (key == Mmacro)
-	    {
-	      if (! macros)
-		im_info->macros = macros = mplist ();
-	      MPLIST_DO (pl, temp->macros)
-		{
-		  p = MPLIST_VAL (pl);
-		  MPLIST_ADD_PLIST (macros, MPLIST_KEY (pl), p);
-		  M17N_OBJECT_REF (p);
-		}
-	    }
-	  else if (key == Mstate)
-	    {
-	      if (! states)
-		im_info->states = states = mplist ();
-	      MPLIST_DO (pl, temp->states)
-		{
-		  MIMState *state = MPLIST_VAL (pl);
+      MPlist *elt = MPLIST_PLIST (plist);
 
-		  mplist_add (states, MPLIST_KEY (pl), state);
-		  M17N_OBJECT_REF (state);
-		}
-	    }
-	  else
-	    MERROR_GOTO (MERROR_IM, err);
-	}
       plist = MPLIST_NEXT (plist);
+      elt = MPLIST_NEXT (elt);
+      if (MPLIST_SYMBOL (elt) != name)
+	continue;
+      elt = MPLIST_NEXT (elt);
+      if (MPLIST_SYMBOL (elt) != extra)
+	continue;
+      elt = MPLIST_NEXT (elt);
+      return MPLIST_VAL (elt);
     }
-
-  if (! states)
-    goto err;
-  if (! title && name)
-    im_info->title
-      = title = mtext_from_data (MSYMBOL_NAME (name), MSYMBOL_NAMELEN (name),
-				 MTEXT_FORMAT_US_ASCII);
-  return im_info;
-
- err:
-  free_im_info (im_info);
   return NULL;
 }
 
-
+static void load_im_info (MPlist *, MInputMethodInfo *);
 
-static int take_action_list (MInputContext *ic, MPlist *action_list);
-static void preedit_commit (MInputContext *ic);
+#define get_custom_info(im_info)				\
+  (im_custom_list						\
+   ? lookup_im_info (im_custom_list, (im_info)->language,	\
+		     (im_info)->name, (im_info)->extra)		\
+   : NULL)
 
-static void
-shift_state (MInputContext *ic, MSymbol state_name)
+#define get_config_info(im_info)				\
+  (im_config_list						\
+   ? lookup_im_info (im_config_list, (im_info)->language,	\
+		     (im_info)->name, (im_info)->extra)		\
+   : NULL)
+
+static int
+update_custom_info (void)
 {
-  MInputMethodInfo *im_info = (MInputMethodInfo *) ic->im->info;
-  MInputContextInfo *ic_info = (MInputContextInfo *) ic->info;
-  MIMState *orig_state = ic_info->state, *state;
+  MPlist *plist, *pl;
 
-  /* Find a state to shift to.  If not found, shift to the initial
-     state.  */
-  if (state_name == Mt)
+  if (im_custom_mdb)
     {
-      if (! ic_info->prev_state)
-	return;
-      state = ic_info->prev_state;
+      if (mdatabase__check (im_custom_mdb) > 0)
+	return 1;
     }
   else
     {
-      state = (MIMState *) mplist_get (im_info->states, state_name);
-      if (! state)
-	state = (MIMState *) MPLIST_VAL (im_info->states);
+      MDatabaseInfo *custom_dir_info;
+      char custom_path[PATH_MAX + 1];
+
+      custom_dir_info = MPLIST_VAL (mdatabase__dir_list);
+      if (! custom_dir_info->filename
+	  || custom_dir_info->len + strlen (CUSTOM_FILE) > PATH_MAX)
+	return -1;
+      strcpy (custom_path, custom_dir_info->filename);
+      strcat (custom_path, CUSTOM_FILE);
+      im_custom_mdb = mdatabase_define (Minput_method, Mt, Mnil, Mconfig,
+					NULL, custom_path);
     }
 
-  MDEBUG_PRINT1 ("\n  [IM] (shift %s)", MSYMBOL_NAME (state->name));
+  if (im_custom_list)
+    {
+      free_im_list (im_custom_list);
+      im_custom_list = NULL;
+    }
+  plist = mdatabase_load (im_custom_mdb);
+  if (! plist)
+    return -1;
+  im_custom_list = mplist ();
 
-  /* Enter the new state.  */
-  ic_info->state = state;
-  ic_info->map = state->map;
-  ic_info->state_key_head = ic_info->key_head;
-  if (state == (MIMState *) MPLIST_VAL (im_info->states))
-    /* We have shifted to the initial state.  */
-    preedit_commit (ic);
-  mtext_cpy (ic_info->preedit_saved, ic->preedit);
-  ic_info->state_pos = ic->cursor_pos;
-  if (state != orig_state )
+  MPLIST_DO (pl, plist)
     {
-      if (state == (MIMState *) MPLIST_VAL (im_info->states))
-	ic_info->prev_state = NULL;
-      else
-	ic_info->prev_state = orig_state;
+      MSymbol language, name, extra;
+      MInputMethodInfo *im_info;
+      MPlist *im_data, *p;
 
-      if (state->title)
-	ic->status = state->title;
+      if (! MPLIST_PLIST_P (pl))
+	continue;
+      p = MPLIST_PLIST (pl);
+      im_data = MPLIST_NEXT (p);
+      if (! MPLIST_PLIST_P (p))
+	continue;
+      p = MPLIST_PLIST (p);
+      if (! MPLIST_SYMBOL_P (p)
+	  || MPLIST_SYMBOL (p) != Minput_method)
+	continue;
+      p = MPLIST_NEXT (p);
+      if (! MPLIST_SYMBOL_P (p))
+	continue;
+      language = MPLIST_SYMBOL (p);
+      p = MPLIST_NEXT (p);
+      if (! MPLIST_SYMBOL_P (p))
+	continue;
+      name = MPLIST_SYMBOL (p);
+      if (language == Mnil || name == Mnil)
+	continue;
+      p = MPLIST_NEXT (p);
+      if (MPLIST_TAIL_P (p))
+	extra = Mnil;
+      else if (MPLIST_SYMBOL_P (p))
+	extra = MPLIST_SYMBOL (p);
       else
-	ic->status = im_info->title;
-      ic->status_changed = 1;
-      if (ic_info->map == ic_info->state->map
-	  && ic_info->map->map_actions)
-	{
-	  MDEBUG_PRINT (" init-actions:");
-	  take_action_list (ic, ic_info->map->map_actions);
-	}
+	continue;
+      im_info = new_im_info (NULL, language, name, extra, im_custom_list);
+      load_im_info (im_data, im_info);
     }
+  M17N_OBJECT_UNREF (plist);
+  return 0;
 }
 
-/* Find a candidate group that contains a candidate number INDEX from
-   PLIST.  Set START_INDEX to the first candidate number of the group,
-   END_INDEX to the last candidate number plus 1, GROUP_INDEX to the
-   candidate group number if they are non-NULL.  If INDEX is -1, find
-   the last candidate group.  */
-
-static MPlist *
-find_candidates_group (MPlist *plist, int index,
-		       int *start_index, int *end_index, int *group_index)
+static int
+update_global_info (void)
 {
-  int i = 0, gidx = 0, len;
+  MPlist *plist;
 
-  MPLIST_DO (plist, plist)
+  if (global_info)
     {
-      if (MPLIST_MTEXT_P (plist))
-	len = mtext_nchars (MPLIST_MTEXT (plist));
-      else
-	len = mplist_length (MPLIST_PLIST (plist));
-      if (index < 0 ? MPLIST_TAIL_P (MPLIST_NEXT (plist))
-	  : i + len > index)
-	{
-	  if (start_index)
-	    *start_index = i;
-	  if (end_index)
-	    *end_index = i + len;
-	  if (group_index)
-	    *group_index = gidx;
-	  return plist;
-	}
-      i += len;
-      gidx++;
+      int ret = mdatabase__check (global_info->mdb);
+
+      if (ret)
+	return ret;
+      fini_im_info (global_info);
     }
-  return NULL;
-}
+  else
+    {
+      MDatabase *mdb = mdatabase_find (Minput_method, Mt, Mnil, Mglobal);
 
-static void
-preedit_insert (MInputContext *ic, int pos, MText *mt, int c)
-{
-  MInputContextInfo *ic_info = ((MInputContext *) ic)->info;
-  MPlist *markers;
-  int nchars = mt ? mtext_nchars (mt) : 1;
+      global_info = new_im_info (mdb, Mt, Mnil, Mglobal, im_info_list);
+    }
+  if (! global_info->mdb
+      || ! (plist = mdatabase_load (global_info->mdb)))
+    return -1;
 
-  if (mt)
-    mtext_ins (ic->preedit, pos, mt);
-  else
-    mtext_ins_char (ic->preedit, pos, c, 1);
-  MPLIST_DO (markers, ic_info->markers)
-    if (MPLIST_INTEGER (markers) > pos)
-      MPLIST_VAL (markers) = (void *) (MPLIST_INTEGER (markers) + nchars);
-  if (ic->cursor_pos >= pos)
-    ic->cursor_pos += nchars;
-  ic->preedit_changed = 1;
+  load_im_info (plist, global_info);
+  M17N_OBJECT_UNREF (plist);
+  return 0;
 }
 
 
-static void
-preedit_delete (MInputContext *ic, int from, int to)
+/* Return an IM_INFO for the an method specified by LANGUAGE, NAME,
+   and EXTRA.  KEY, if not Mnil, tells which kind of information about
+   the input method is necessary, and the returned IM_INFO may contain
+   only that information.  */
+
+static MInputMethodInfo *
+get_im_info (MSymbol language, MSymbol name, MSymbol extra, MSymbol key)
 {
-  MInputContextInfo *ic_info = ((MInputContext *) ic)->info;
-  MPlist *markers;
+  MPlist *plist;
+  MInputMethodInfo *im_info;
+  MDatabase *mdb;
 
-  mtext_del (ic->preedit, from, to);
-  MPLIST_DO (markers, ic_info->markers)
+  if (name == Mnil && extra == Mnil)
+    language = Mt, extra = Mglobal;
+  im_info = lookup_im_info (im_info_list, language, name, extra);
+  if (im_info)
     {
-      if (MPLIST_INTEGER (markers) > to)
-	MPLIST_VAL (markers)
-	  = (void *) (MPLIST_INTEGER (markers) - (to - from));
-      else if (MPLIST_INTEGER (markers) > from);
-	MPLIST_VAL (markers) = (void *) from;
+      if (key == Mnil ? im_info->states != NULL
+	  : key == Mcommand ? im_info->cmds != NULL
+	  : key == Mvariable ? im_info->vars != NULL
+	  : key == Mtitle ? im_info->title != NULL
+	  : key == Mdescription ? im_info->description != NULL
+	  : 1)
+	/* IM_INFO already contains required information.  */
+	return im_info;
+      /* We have not yet loaded required information.  */
     }
-  if (ic->cursor_pos >= to)
-    ic->cursor_pos -= to - from;
-  else if (ic->cursor_pos > from)
-    ic->cursor_pos = from;
-  ic->preedit_changed = 1;
-}
-
-static void
-preedit_commit (MInputContext *ic)
-{
-  MInputContextInfo *ic_info = (MInputContextInfo *) ic->info;
-  int preedit_len = mtext_nchars (ic->preedit);
-
-  if (preedit_len > 0)
+  else
     {
-      MPlist *p;
-
-      mtext_put_prop_values (ic->preedit, 0, mtext_nchars (ic->preedit),
-			     Mcandidate_list, NULL, 0);
-      mtext_put_prop_values (ic->preedit, 0, mtext_nchars (ic->preedit),
-			     Mcandidate_index, NULL, 0);
-      mtext_cat (ic->produced, ic->preedit);
-      if ((mdebug__flag & mdebug_mask)
-	  && mtext_nchars (ic->produced) > 0)
-	{
-	  int i;
+      mdb = mdatabase_find (Minput_method, language, name, extra);
+      if (! mdb)
+	return NULL;
+      im_info = new_im_info (mdb, language, name, extra, im_info_list);
+    }
 
-	  MDEBUG_PRINT (" (produced");
-	  for (i = 0; i < mtext_nchars (ic->produced); i++)
-	    MDEBUG_PRINT1 (" U+%04X", mtext_ref_char (ic->produced, i));
-	  MDEBUG_PRINT (")");
-	}
-      mtext_reset (ic->preedit);
-      mtext_reset (ic_info->preedit_saved);
-      MPLIST_DO (p, ic_info->markers)
-	MPLIST_VAL (p) = 0;
-      ic->cursor_pos = ic_info->state_pos = 0;
-      ic->preedit_changed = 1;
+  if (key == Mnil)
+    {
+      plist = mdatabase_load (im_info->mdb);
     }
-  if (ic->candidate_list)
+  else
     {
-      M17N_OBJECT_UNREF (ic->candidate_list);
-      ic->candidate_list = NULL;
-      ic->candidate_show = 0;
-      ic->candidates_changed = MINPUT_CANDIDATES_LIST_CHANGED;
-      if (ic->candidate_show)
-	{
-	  ic->candidate_show = 0;
-	  ic->candidates_changed |= MINPUT_CANDIDATES_SHOW_CHANGED;
-	}
+      mplist_push (load_im_info_keys, key, Mt);
+      plist = mdatabase__load_for_keys (im_info->mdb, load_im_info_keys);
+      mplist_pop (load_im_info_keys);
     }
-
-  memmove (ic_info->keys, ic_info->keys + ic_info->key_head,
-	   sizeof (int) * (ic_info->used - ic_info->key_head));
-  ic_info->used -= ic_info->key_head;
-  ic_info->state_key_head = ic_info->key_head = 0;
+  im_info->tick = 0;
+  if (! plist)
+    MERROR (MERROR_IM, im_info);
+  update_global_info ();
+  load_im_info (plist, im_info);
+  M17N_OBJECT_UNREF (plist);
+  if (key == Mnil)
+    {
+      if (! im_info->cmds)
+	im_info->cmds = mplist ();
+      if (! im_info->vars)
+	im_info->vars = mplist ();
+    }
+  if (! im_info->title
+      && (key == Mnil || key == Mtitle))
+    im_info->title = (name == Mnil ? mtext ()
+		      : mtext_from_data (MSYMBOL_NAME (name),
+					 MSYMBOL_NAMELEN (name),
+					 MTEXT_FORMAT_US_ASCII));
+  return im_info;
 }
 
+/* Check if IM_INFO->mdb is updated or not.  If not updated, return 0.
+   If updated, but got unloadable, return -1.  Otherwise, update
+   contents of IM_INFO from the new database, and return 1.  */
+
 static int
-new_index (MInputContext *ic, int current, int limit, MSymbol sym, MText *mt)
+reload_im_info (MInputMethodInfo *im_info)
 {
-  int code = marker_code (sym);
+  int check;
+  MPlist *plist;
 
-  if (mt && (code == '[' || code == ']'))
-    {
-      int pos = current;
+  update_custom_info ();
+  update_global_info ();
+  check = mdatabase__check (im_info->mdb);
+  if (check < 0)
+    return -1;
+  plist = mdatabase_load (im_info->mdb);
+  if (! plist)
+    return -1;
+  fini_im_info (im_info);
+  load_im_info (plist, im_info);
+  M17N_OBJECT_UNREF (plist);
+  return 1;
+}
 
-      if (code == '[' && current > 0)
-	{
-	  if (mtext_prop_range (mt, Mcandidate_list, pos - 1, &pos, NULL, 1)
-	      && pos > 0)
-	    current = pos;
-	}
-      else if (code == ']' && current < mtext_nchars (mt))
-	{
-	  if (mtext_prop_range (mt, Mcandidate_list, pos, NULL, &pos, 1))
-	    current = pos;
-	}
-      return current;
-    }
-  if (code >= 0)
-    return (code == '<' ? 0
-	    : code == '>' ? limit
-	    : code == '-' ? current - 1
-	    : code == '+' ? current + 1
-	    : code == '=' ? current
-	    : code - '0' > limit ? limit
-	    : code - '0');
-  if (! ic)  
-    return 0;
-  return (int) mplist_get (((MInputContextInfo *) ic->info)->markers, sym);
+static MInputMethodInfo *
+get_im_info_by_tags (MPlist *plist)
+{
+  MSymbol tag[3];
+  int i;
+
+  for (i = 0; i < 3 && MPLIST_SYMBOL_P (plist);
+       i++, plist = MPLIST_NEXT (plist))
+    tag[i] = MPLIST_SYMBOL (plist);
+  if (i < 2)
+    return NULL;
+  for (; i < 3; i++)
+    tag[i] = Mnil;
+  return get_im_info (tag[0], tag[1], tag[2], Mnil);
 }
 
-static void
-update_candidate (MInputContext *ic, MTextProperty *prop, int idx)
+
+static int
+check_description (MPlist *plist)
 {
-  int from = mtext_property_start (prop);
-  int to = mtext_property_end (prop);
-  int start;
-  MPlist *candidate_list = mtext_property_value (prop);
-  MPlist *group = find_candidates_group (candidate_list, idx, &start,
-					 NULL, NULL);
-  int ingroup_index = idx - start;
   MText *mt;
 
-  preedit_delete (ic, from, to);
-  if (MPLIST_MTEXT_P (group))
-    {
-      mt = MPLIST_MTEXT (group);
-      preedit_insert (ic, from, NULL, mtext_ref_char (mt, ingroup_index));
-      to = from + 1;
-    }
-  else
+  if (MPLIST_MTEXT_P (plist))
+    return 1;
+  if (MPLIST_PLIST_P (plist))
     {
-      int i;
-      MPlist *plist;
+      MPlist *pl = MPLIST_PLIST (plist);
 
-      for (i = 0, plist = MPLIST_PLIST (group); i < ingroup_index;
-	   i++, plist = MPLIST_NEXT (plist));
-      mt = MPLIST_MTEXT (plist);
-      preedit_insert (ic, from, mt, 0);
-      to = from + mtext_nchars (mt);
+      if (MFAILP (MPLIST_SYMBOL_P (pl) && MPLIST_SYMBOL (pl) == M_gettext))
+	return 0;
+      pl =MPLIST_NEXT (pl);
+      if (MFAILP (MPLIST_MTEXT_P (pl)))
+	return 0;
+      mt = MPLIST_MTEXT (pl);
+      M17N_OBJECT_REF (mt);
+#if ENABLE_NLS
+      {
+	char *translated = dgettext ("m17n-db", (char *) MTEXT_DATA (mt));
+
+	if (translated == (char *) MTEXT_DATA (mt))
+	  translated = dgettext ("m17n-contrib", (char *) MTEXT_DATA (mt));
+	if (translated != (char *) MTEXT_DATA (mt))
+	  {
+	    M17N_OBJECT_UNREF (mt);
+	    mt = mtext__from_data (translated, strlen (translated),
+				   MTEXT_FORMAT_UTF_8, 0);
+	  }
+      }
+#endif
+      mplist_set (plist, Mtext, mt);
+      M17N_OBJECT_UNREF (mt);
+      return 1;
     }
-  mtext_put_prop (ic->preedit, from, to, Mcandidate_list, candidate_list);
-  mtext_put_prop (ic->preedit, from, to, Mcandidate_index, (void *) idx);
-  ic->cursor_pos = to;
+  if (MFAILP (MPLIST_SYMBOL_P (plist) && MPLIST_SYMBOL (plist) == Mnil))
+    return 0;
+  return 1;
 }
 
-static MCharset *
-get_select_charset (MInputContextInfo * ic_info)
+
+/* Check KEYSEQ, and return 1 if it is valid as a key sequence, return
+   0 if not.  */
+
+static int
+check_command_keyseq (MPlist *keyseq)
 {
-  MPlist *plist = resolve_variable (ic_info, Mcandidates_charset);
-  MSymbol sym;
+  if (MPLIST_PLIST_P (keyseq))
+    {
+      MPlist *p = MPLIST_PLIST (keyseq);
 
-  if (! MPLIST_VAL (plist))
-    return NULL;
-  sym = MPLIST_SYMBOL (plist);
-  if (sym == Mnil)
-    return NULL;
-  return MCHARSET (sym);
+      MPLIST_DO (p, p)
+	if (! MPLIST_SYMBOL_P (p) && ! MPLIST_INTEGER_P (p))
+	  return 0;
+      return 1;
+    }
+  if (MPLIST_MTEXT_P (keyseq))
+    {
+      MText *mt = MPLIST_MTEXT (keyseq);
+      int i;
+      
+      for (i = 0; i < mtext_nchars (mt); i++)
+	if (mtext_ref_char (mt, i) >= 256)
+	  return 0;
+      return 1;
+    }
+  return 0;
 }
 
-static MPlist *
-adjust_candidates (MPlist *plist, MCharset *charset)
+/* Load command defitions from PLIST into IM_INFO->cmds.
+
+   PLIST is well-formed and has this form;
+     (command (NAME [DESCRIPTION KEYSEQ ...]) ...)
+   NAME is a symbol.  DESCRIPTION is an M-text or `nil'.  KEYSEQ is an
+   M-text or a plist of symbols.
+
+   The returned list has the same form, but for each element...
+
+   (1) If DESCRIPTION and the rest are omitted, the element is not
+   stored in the returned list.
+
+   (2) If DESCRIPTION is nil, it is complemented by the corresponding
+   description in global_info->cmds (if any).  */
+
+static void
+load_commands (MInputMethodInfo *im_info, MPlist *plist)
 {
-  MPlist *pl;
+  MPlist *tail;
 
-  /* plist ::= MTEXT ... | PLIST ... */
-  plist = mplist_copy (plist);
-  if (MPLIST_MTEXT_P (plist))
+  im_info->cmds = tail = mplist ();
+
+  MPLIST_DO (plist, MPLIST_NEXT (plist))
     {
-      pl = plist;
-      while (! MPLIST_TAIL_P (pl))
-	{
-	  /* pl ::= MTEXT ... */
-	  MText *mt = MPLIST_MTEXT (pl);
-	  int mt_copied = 0;
-	  int i, c;
+      /* PLIST ::= ((NAME DESC KEYSEQ ...) ...) */
+      MPlist *pl, *p;
 
-	  for (i = mtext_nchars (mt) - 1; i >= 0; i--)
-	    {
-	      c = mtext_ref_char (mt, i);
-	      if (ENCODE_CHAR (charset, c) == MCHAR_INVALID_CODE)
-		{
-		  if (! mt_copied)
-		    {
-		      mt = mtext_dup (mt);
-		      mplist_set (pl, Mtext, mt);
-		      M17N_OBJECT_UNREF (mt);
-		      mt_copied = 1;
-		    }
-		  mtext_del (mt, i, i + 1);
-		}
-	    }
-	  if (mtext_len (mt) > 0)
-	    pl = MPLIST_NEXT (pl);
-	  else
+      if (MFAILP (MPLIST_PLIST_P (plist)))
+	continue;
+      pl = MPLIST_PLIST (plist); /* PL ::= (NAME DESC KEYSEQ ...) */
+      if (MFAILP (MPLIST_SYMBOL_P (pl)))
+	continue;
+      p = MPLIST_NEXT (pl);	/* P ::= (DESC KEYSEQ ...) */
+      if (MPLIST_TAIL_P (p))	/* PL ::= (NAME) */
+	{
+	  if (MFAILP (im_info != global_info))
+	    mplist_add (p, Msymbol, Mnil); /* PL ::= (NAME nil) */
+	}
+      else
+	{
+	  if (! check_description (p))
+	    mplist_set (p, Msymbol, Mnil);
+	  p = MPLIST_NEXT (p);
+	  while (! MPLIST_TAIL_P (p))
 	    {
-	      mplist_pop (pl);
-	      M17N_OBJECT_UNREF (mt);
+	      if (MFAILP (check_command_keyseq (p)))
+		mplist__pop_unref (p);
+	      else
+		p = MPLIST_NEXT (p);
 	    }
 	}
+      tail = mplist_add (tail, Mplist, pl);
     }
-  else				/* MPLIST_PLIST_P (plist) */
+}
+
+static MPlist *
+config_command (MPlist *plist, MPlist *global_cmds, MPlist *custom_cmds,
+		MPlist *config_cmds)
+{
+  MPlist *global = NULL, *custom = NULL, *config = NULL;
+  MSymbol name;
+  MSymbol status;
+  MPlist *description = NULL, *keyseq;
+
+  name = MPLIST_SYMBOL (plist);
+  plist = MPLIST_NEXT (plist);
+  if (MPLIST_MTEXT_P (plist) || MPLIST_PLIST_P (plist))
+    description = plist;
+  else if (global_cmds && ((global = mplist__assq (global_cmds, name))))
+    description = global = MPLIST_NEXT (MPLIST_PLIST (global));
+  if (MPLIST_TAIL_P (plist))
     {
-      pl = plist;
-      while (! MPLIST_TAIL_P (pl))
+      if (! global
+	  && global_cmds && ((global = mplist__assq (global_cmds, name))))
+	global = MPLIST_NEXT (MPLIST_PLIST (global));
+      if (global)
 	{
-	  /* pl ::= (MTEXT ...) ... */
-	  MPlist *p = MPLIST_PLIST (pl);
-	  int p_copied = 0;
-	  /* p ::= MTEXT ... */
-	  MPlist *p0 = p;
-	  int n = 0;
-
-	  while (! MPLIST_TAIL_P (p0))
-	    {
-	      MText *mt = MPLIST_MTEXT (p0);
-	      int i, c;
+	  keyseq = MPLIST_NEXT (global);
+	  status = Minherited;
+	}
+      else
+	{
+	  keyseq = plist;
+	  status = Mnil;
+	}
+    }
+  else
+    {
+      keyseq = MPLIST_NEXT (plist);
+      status = Mnil;
+    }
 
-	      for (i = mtext_nchars (mt) - 1; i >= 0; i--)
-		{
-		  c = mtext_ref_char (mt, i);
-		  if (ENCODE_CHAR (charset, c) == MCHAR_INVALID_CODE)
-		    break;
-		}
-	      if (i < 0)
-		{
-		  p0 = MPLIST_NEXT (p0);
-		  n++;
-		}
-	      else
-		{
-		  if (! p_copied)
-		    {
-		      p = mplist_copy (p);
-		      mplist_set (pl, Mplist, p);
-		      M17N_OBJECT_UNREF (p);
-		      p_copied = 1;
-		      p0 = p;
-		      while (n-- > 0)
-			p0 = MPLIST_NEXT (p0);
-		    }	  
-		  mplist_pop (p0);
-		  M17N_OBJECT_UNREF (mt);
-		}
-	    }
-	  if (! MPLIST_TAIL_P (p))
-	    pl = MPLIST_NEXT (pl);
-	  else
-	    {
-	      mplist_pop (pl);
-	      M17N_OBJECT_UNREF (p);
-	    }
+  if (config_cmds && (config = mplist__assq (config_cmds, name)))
+    {
+      config = MPLIST_NEXT (MPLIST_PLIST (config));
+      if (! MPLIST_TAIL_P (config))
+	{
+	  keyseq = MPLIST_NEXT (config);
+	  status = Mconfigured;
 	}
     }
-  if (MPLIST_TAIL_P (plist))
+  else if (custom_cmds && (custom = mplist__assq (custom_cmds, name)))
     {
-      M17N_OBJECT_UNREF (plist);
-      return NULL;
-    }      
+      custom = MPLIST_NEXT (MPLIST_PLIST (custom));
+      if (! MPLIST_TAIL_P (custom))
+	{
+	  keyseq = MPLIST_NEXT (custom);
+	  status = Mcustomized;
+	}
+    }
+  
+  plist = mplist ();
+  mplist_add (plist, Msymbol, name);
+  if (description)
+    mplist_add (plist, MPLIST_KEY (description), MPLIST_VAL (description));
+  else
+    mplist_add (plist, Msymbol, Mnil);
+  mplist_add (plist, Msymbol, status);
+  mplist__conc (plist, keyseq);
   return plist;
 }
 
-static MPlist *
-get_candidate_list (MInputContextInfo *ic_info, MPlist *args)
+static void
+config_all_commands (MInputMethodInfo *im_info)
 {
-  MCharset *charset = get_select_charset (ic_info);
-  MPlist *plist;
-  int column;
-  int i, len;
+  MPlist *global_cmds, *custom_cmds, *config_cmds;
+  MInputMethodInfo *temp;
+  MPlist *tail, *plist;
 
-  plist = resolve_variable (ic_info, Mcandidates_group_size);
-  column = MPLIST_INTEGER (plist);
+  M17N_OBJECT_UNREF (im_info->configured_cmds);
 
-  plist = MPLIST_PLIST (args);
-  if (charset)
+  if (MPLIST_TAIL_P (im_info->cmds)
+      || ! im_info->mdb)
+    return;
+
+  global_cmds = im_info != global_info ? global_info->cmds : NULL;
+  custom_cmds = ((temp = get_custom_info (im_info)) ? temp->cmds : NULL);
+  config_cmds = ((temp = get_config_info (im_info)) ? temp->cmds : NULL);
+
+  im_info->configured_cmds = tail = mplist ();
+  MPLIST_DO (plist, im_info->cmds)
     {
-      if (! (plist = adjust_candidates (plist, charset)))
-	return NULL;
+      MPlist *pl = config_command (MPLIST_PLIST (plist),
+				   global_cmds, custom_cmds, config_cmds);
+      if (pl)
+	{
+	  tail = mplist_add (tail, Mplist, pl);
+	  M17N_OBJECT_UNREF (pl);
+	}
     }
-  else
-    M17N_OBJECT_REF (plist);
+}
 
-  if (column > 0)
+/* Check VAL's value against VALID_VALUES, and return 1 if it is
+   valid, return 0 if not.  */
+
+static int
+check_variable_value (MPlist *val, MPlist *global)
+{
+  MSymbol type = MPLIST_KEY (val);
+  MPlist *valids = MPLIST_NEXT (val);
+
+  if (type != Minteger && type != Mtext && type != Msymbol)
+    return 0;
+  if (global)
     {
-      if (MPLIST_MTEXT_P (plist))
-	{
-	  MText *mt = MPLIST_MTEXT (plist);
-	  MPlist *next = MPLIST_NEXT (plist);
+      if (MPLIST_KEY (global) != Mt
+	  && MPLIST_KEY (global) != MPLIST_KEY (val))
+	return 0;
+      if (MPLIST_TAIL_P (valids))
+	valids = MPLIST_NEXT (global);
+    }
+  if (MPLIST_TAIL_P (valids))
+    return 1;
 
-	  if (MPLIST_TAIL_P (next))
-	    M17N_OBJECT_REF (mt);
-	  else
+  if (type == Minteger)
+    {
+      int n = MPLIST_INTEGER (val);
+
+      MPLIST_DO (valids, valids)
+	{
+	  if (MPLIST_INTEGER_P (valids))
 	    {
-	      mt = mtext_dup (mt);
-	      while (! MPLIST_TAIL_P (next))
-		{
-		  mt = mtext_cat (mt, MPLIST_MTEXT (next));
-		  next = MPLIST_NEXT (next);
-		}
+	      if (n == MPLIST_INTEGER (valids))
+		break;
 	    }
-	  M17N_OBJECT_UNREF (plist);
-	  plist = mplist ();
-	  len = mtext_nchars (mt);
-	  if (len <= column)
-	    mplist_add (plist, Mtext, mt);
-	  else
+	  else if (MPLIST_PLIST_P (valids))
 	    {
-	      for (i = 0; i < len; i += column)
-		{
-		  int to = (i + column < len ? i + column : len);
-		  MText *sub = mtext_copy (mtext (), 0, mt, i, to);
-						       
-		  mplist_add (plist, Mtext, sub);
-		  M17N_OBJECT_UNREF (sub);
-		}
+	      MPlist *p = MPLIST_PLIST (valids);
+	      int min_bound, max_bound;
+
+	      if (! MPLIST_INTEGER_P (p))
+		MERROR (MERROR_IM, 0);
+	      min_bound = MPLIST_INTEGER (p);
+	      p = MPLIST_NEXT (p);
+	      if (! MPLIST_INTEGER_P (p))
+		MERROR (MERROR_IM, 0);
+	      max_bound = MPLIST_INTEGER (p);
+	      if (n >= min_bound && n <= max_bound)
+		break;
 	    }
-	  M17N_OBJECT_UNREF (mt);
 	}
-      else		/* MPLIST_PLIST_P (plist) */
+    }
+  else if (type == Msymbol)
+    {
+      MSymbol sym = MPLIST_SYMBOL (val);
+
+      MPLIST_DO (valids, valids)
 	{
-	  MPlist *pl = MPLIST_PLIST (plist), *p;
-	  MPlist *next = MPLIST_NEXT (plist);
-	  int j;
+	  if (! MPLIST_SYMBOL_P (valids))
+	    MERROR (MERROR_IM, 0);
+	  if (sym == MPLIST_SYMBOL (valids))
+	    break;
+	}
+    }
+  else
+    {
+      MText *mt = MPLIST_MTEXT (val);
 
-	  if (MPLIST_TAIL_P (next))
-	    M17N_OBJECT_REF (pl);
+      MPLIST_DO (valids, valids)
+	{
+	  if (! MPLIST_MTEXT_P (valids))
+	    MERROR (MERROR_IM, 0);
+	  if (mtext_cmp (mt, MPLIST_MTEXT (valids)) == 0)
+	    break;
+	}
+    }
+
+  return (MPLIST_TAIL_P (valids));
+}
+
+/* Load variable defitions from PLIST into IM_INFO->vars.
+
+   PLIST is well-formed and has this form;
+     ((NAME [DESCRIPTION DEFAULT-VALUE VALID-VALUE ...])
+      ...)
+   NAME is a symbol.  DESCRIPTION is an M-text or `nil'.
+
+   The returned list has the same form, but for each element...
+
+   (1) If DESCRIPTION and the rest are omitted, the element is not
+   stored in the returned list.
+
+   (2) If DESCRIPTION is nil, it is complemented by the corresponding
+   description in global_info->vars (if any).  */
+
+static void
+load_variables (MInputMethodInfo *im_info, MPlist *plist)
+{
+  MPlist *global_vars = ((im_info->mdb && im_info != global_info)
+			 ? global_info->vars : NULL);
+  MPlist *tail;
+
+  im_info->vars = tail = mplist ();
+  MPLIST_DO (plist, MPLIST_NEXT (plist))
+    {
+      MPlist *pl, *p;
+
+      if (MFAILP (MPLIST_PLIST_P (plist)))
+	continue;
+      pl = MPLIST_PLIST (plist); /* PL ::= (NAME DESC VALUE VALID ...) */
+      if (MFAILP (MPLIST_SYMBOL_P (pl)))
+	continue;
+      if (im_info == global_info)
+	{
+	  /* Loading a global variable.  */
+	  p = MPLIST_NEXT (pl);
+	  if (MPLIST_TAIL_P (p))
+	    mplist_add (p, Msymbol, Mnil);
 	  else
 	    {
-	      pl = mplist_copy (pl);
-	      while (! MPLIST_TAIL_P (next))
-		{
-		  p = mplist_copy (MPLIST_PLIST (next));
-		  pl = mplist__conc (pl, p);
-		  M17N_OBJECT_UNREF (p);
-		  next = MPLIST_NEXT (next);
-		}
+	      if (! check_description (p))
+		mplist_set (p, Msymbol, Mnil);
+	      p = MPLIST_NEXT (p);
+	      if (MFAILP (! MPLIST_TAIL_P (p)
+			  && check_variable_value (p, NULL)))
+		mplist_set (p, Mt, NULL);
 	    }
-	  M17N_OBJECT_UNREF (plist);
-	  plist = mplist ();
-	  len = mplist_length (pl);
-	  if (len <= column)
-	    mplist_add (plist, Mplist, pl);
-	  else
+	}
+      else if (im_info->mdb)
+	{
+	  /* Loading a local variable.  */
+	  MSymbol name = MPLIST_SYMBOL (pl);
+	  MPlist *global = NULL;
+
+	  if (global_vars
+	      && (p = mplist__assq (global_vars, name)))
 	    {
-	      MPlist *p0 = pl;
+	      /* P ::= ((NAME DESC ...) ...) */
+	      p = MPLIST_PLIST (p); /* P ::= (NAME DESC ...) */
+	      global = MPLIST_NEXT (p); /* P ::= (DESC VALUE ...) */
+	      global = MPLIST_NEXT (p); /* P ::= (VALUE ...) */
+	    }
 
-	      for (i = 0; i < len; i += column)
+	  p = MPLIST_NEXT (pl);	/* P ::= (DESC VALUE VALID ...) */
+	  if (! MPLIST_TAIL_P (p))
+	    {
+	      if (! check_description (p))
+		mplist_set (p, Msymbol, Mnil);
+	      p = MPLIST_NEXT (p); /* P ::= (VALUE VALID ...) */
+	      if (MFAILP (! MPLIST_TAIL_P (p)))
+		mplist_set (p, Mt, NULL);
+	      else
 		{
-		  p = mplist ();
-		  mplist_add (plist, Mplist, p);
-		  M17N_OBJECT_UNREF (p);
-		  for (j = 0; j < column && i + j < len; j++)
-		    {
-		      p = mplist_add (p, Mtext, MPLIST_VAL (p0));
-		      p0 = MPLIST_NEXT (p0);
-		    }
+		  MPlist *valid_values = MPLIST_NEXT (p);
+
+		  if (! MPLIST_TAIL_P (valid_values)
+		      ? MFAILP (check_variable_value (p, NULL))
+		      : global && MFAILP (check_variable_value (p, global)))
+		    mplist_set (p, Mt, NULL);
 		}
 	    }
-	  M17N_OBJECT_UNREF (pl);
 	}
+      else
+	{
+	  /* Loading a variable customization.  */
+	  p = MPLIST_NEXT (pl);	/* P ::= (nil VALUE) */
+	  if (MFAILP (! MPLIST_TAIL_P (p)))
+	    continue;
+	  p = MPLIST_NEXT (p);	/* P ::= (VALUE) */
+	  if (MFAILP (MPLIST_INTEGER_P (p) || MPLIST_SYMBOL_P (p)
+		      || MPLIST_MTEXT_P (p)))
+	    continue;
+	}
+      tail = mplist_add (tail, Mplist, pl);
     }
-
-  return plist;
 }
 
-
 static MPlist *
-regularize_action (MPlist *action_list)
+config_variable (MPlist *plist, MPlist *global_vars, MPlist *custom_vars,
+		 MPlist *config_vars)
 {
-  MPlist *action = NULL;
-  MSymbol name;
-  MPlist *args;
+  MPlist *global = NULL, *custom = NULL, *config = NULL;
+  MSymbol name = MPLIST_SYMBOL (plist);
+  MSymbol status;
+  MPlist *description = NULL, *value, *valids;
 
-  if (MPLIST_PLIST_P (action_list))
+  if (global_vars)
     {
-      action = MPLIST_PLIST (action_list);
-      if (MPLIST_SYMBOL_P (action))
+      global = mplist__assq (global_vars, name);
+      if (global)
+	global = MPLIST_NEXT (MPLIST_PLIST (global)); /* (DESC VALUE ...) */
+    }
+
+  plist = MPLIST_NEXT (plist);
+  if (MPLIST_MTEXT_P (plist) || MPLIST_PLIST_P (plist))
+    description = plist;
+  else if (global)
+    description = global;
+  if (global)
+    global = MPLIST_NEXT (global); /* (VALUE VALIDS ...) */
+
+  if (MPLIST_TAIL_P (plist))
+    {
+      /* Inherit from global (if any).  */
+      if (global)
 	{
-	  name = MPLIST_SYMBOL (action);
-	  args = MPLIST_NEXT (action);
-	  if (name == Minsert
-	      && MPLIST_PLIST_P (args))
-	    mplist_set (action, Msymbol, M_candidates);
+	  value = global;
+	  if (MPLIST_KEY (value) == Mt)
+	    value = NULL;
+	  valids = MPLIST_NEXT (global);
+	  status = Minherited;
 	}
-      else if (MPLIST_MTEXT_P (action) || MPLIST_PLIST_P (action))
+      else
 	{
-	  action = mplist ();
-	  mplist_push (action, Mplist, MPLIST_VAL (action_list));
-	  mplist_push (action, Msymbol, M_candidates);
-	  mplist_set (action_list, Mplist, action);
-	  M17N_OBJECT_UNREF (action);
+	  value = NULL;
+	  valids = NULL;
+	  status = Mnil;
+	  plist = NULL;
 	}
     }
-  else if (MPLIST_MTEXT_P (action_list) || MPLIST_INTEGER_P (action_list))
+  else
     {
-      action = mplist ();
-      mplist_push (action, MPLIST_KEY (action_list), MPLIST_VAL (action_list));
-      mplist_push (action, Msymbol, Minsert);
-      mplist_set (action_list, Mplist, action);
-      M17N_OBJECT_UNREF (action);
+      value = plist = MPLIST_NEXT (plist);
+      valids = MPLIST_NEXT (value);
+      if (MPLIST_KEY (value) == Mt)
+	value = NULL;
+      if (! MPLIST_TAIL_P (valids))
+	global = NULL;
+      else if (global)
+	valids = MPLIST_NEXT (global);
+      status = Mnil;
     }
-  return action;
+
+  if (config_vars && (config = mplist__assq (config_vars, name)))
+    {
+      config = MPLIST_NEXT (MPLIST_PLIST (config));
+      if (! MPLIST_TAIL_P (config))
+	{
+	  value = MPLIST_NEXT (config);
+	  if (MFAILP (check_variable_value (value, global ? global : plist)))
+	    value = NULL;
+	  status = Mconfigured;
+	}
+    }
+  else if (custom_vars && (custom = mplist__assq (custom_vars, name)))
+    {
+      custom = MPLIST_NEXT (MPLIST_PLIST (custom));
+      if (! MPLIST_TAIL_P (custom))
+	{
+	  value = MPLIST_NEXT (custom);
+	  if (MFAILP (check_variable_value (value, global ? global : plist)))
+	    value = NULL;
+	  status = Mcustomized;
+	}
+    }
+  
+  plist = mplist ();
+  mplist_add (plist, Msymbol, name);
+  if (description)
+    mplist_add (plist, MPLIST_KEY (description), MPLIST_VAL (description));
+  else
+    mplist_add (plist, Msymbol, Mnil);
+  mplist_add (plist, Msymbol, status);
+  if (value)
+    mplist_add (plist, MPLIST_KEY (value), MPLIST_VAL (value));
+  else
+    mplist_add (plist, Mt, NULL);
+  if (valids && ! MPLIST_TAIL_P (valids))
+    mplist__conc (plist, valids);
+  return plist;
 }
 
-static int
-take_action_list (MInputContext *ic, MPlist *action_list)
+/* Return a configured variable definition list based on
+   IM_INFO->vars.  If a variable in it doesn't contain a value, try to
+   get it from global_info->vars.  */
+
+static void
+config_all_variables (MInputMethodInfo *im_info)
 {
-  MInputContextInfo *ic_info = (MInputContextInfo *) ic->info;
-  MPlist *candidate_list = ic->candidate_list;
-  int candidate_index = ic->candidate_index;
-  int candidate_show = ic->candidate_show;
-  MTextProperty *prop;
+  MPlist *global_vars, *custom_vars, *config_vars;
+  MInputMethodInfo *temp;
+  MPlist *tail, *plist;
 
-  MPLIST_DO (action_list, action_list)
-    {
-      MPlist *action = regularize_action (action_list);
-      MSymbol name;
-      MPlist *args;
+  M17N_OBJECT_UNREF (im_info->configured_vars);
 
-      if (! action)
-	continue;
-      name = MPLIST_SYMBOL (action);
-      args = MPLIST_NEXT (action);
+  if (MPLIST_TAIL_P (im_info->vars)
+      || ! im_info->mdb)
+    return;
 
-      MDEBUG_PRINT1 (" %s", MSYMBOL_NAME (name));
-      if (name == Minsert)
+  global_vars = im_info != global_info ? global_info->vars : NULL;
+  custom_vars = ((temp = get_custom_info (im_info)) ? temp->vars : NULL);
+  config_vars = ((temp = get_config_info (im_info)) ? temp->vars : NULL);
+
+  im_info->configured_vars = tail = mplist ();
+  MPLIST_DO (plist, im_info->vars)
+    {
+      MPlist *pl = config_variable (MPLIST_PLIST (plist),
+				    global_vars, custom_vars, config_vars);
+      if (pl)
 	{
-	  if (MPLIST_SYMBOL_P (args))
-	    {
-	      args = resolve_variable (ic_info, MPLIST_SYMBOL (args));
-	      if (! MPLIST_MTEXT_P (args) && ! MPLIST_INTEGER_P (args))
-		continue;
-	    }
-	  if (MPLIST_MTEXT_P (args))
-	    preedit_insert (ic, ic->cursor_pos, MPLIST_MTEXT (args), 0);
-	  else			/* MPLIST_INTEGER_P (args)) */
-	    preedit_insert (ic, ic->cursor_pos, NULL, MPLIST_INTEGER (args));
+	  tail = mplist_add (tail, Mplist, pl);
+	  M17N_OBJECT_UNREF (pl);
 	}
-      else if (name == M_candidates)
-	{
-	  MPlist *plist = get_candidate_list (ic_info, args);
-	  int len;
+    }
+}
 
-	  if (! plist)
-	    continue;
-	  if (MPLIST_MTEXT_P (plist))
-	    {
-	      preedit_insert (ic, ic->cursor_pos, NULL,
-			      mtext_ref_char (MPLIST_MTEXT (plist), 0));
-	      len = 1;
-	    }
-	  else
-	    {
-	      MText * mt = MPLIST_MTEXT (MPLIST_PLIST (plist));
+/* Load an input method (LANGUAGE NAME) from PLIST into IM_INFO.
+   CONFIG contains configuration information of the input method.  */
 
-	      preedit_insert (ic, ic->cursor_pos, mt, 0);
-	      len = mtext_nchars (mt);
-	    }
-	  mtext_put_prop (ic->preedit,
-			  ic->cursor_pos - len, ic->cursor_pos,
-			  Mcandidate_list, plist);
-	  mtext_put_prop (ic->preedit,
-			  ic->cursor_pos - len, ic->cursor_pos,
-			  Mcandidate_index, (void *) 0);
-	  M17N_OBJECT_UNREF (plist);
-	}
-      else if (name == Mselect)
-	{
-	  int start, end;
-	  int code, idx, gindex;
-	  int pos = ic->cursor_pos;
-	  MPlist *group;
+static void
+load_im_info (MPlist *plist, MInputMethodInfo *im_info)
+{
+  MPlist *pl, *p;
 
-	  if (pos == 0
-	      || ! (prop = mtext_get_property (ic->preedit, pos - 1,
-					       Mcandidate_list)))
-	    continue;
-	  if (MPLIST_SYMBOL_P (args))
-	    {
-	      code = marker_code (MPLIST_SYMBOL (args));
-	      if (code < 0)
-		continue;
-	    }
-	  else
-	    code = -1;
-	  idx = (int) mtext_get_prop (ic->preedit, pos - 1, Mcandidate_index);
-	  group = find_candidates_group (mtext_property_value (prop), idx,
-					 &start, &end, &gindex);
+  if (! im_info->cmds && (pl = mplist__assq (plist, Mcommand)))
+    {
+      load_commands (im_info, MPLIST_PLIST (pl));
+      config_all_commands (im_info);
+      pl = mplist_pop (pl);
+      M17N_OBJECT_UNREF (pl);
+    }
 
-	  if (code != '[' && code != ']')
-	    {
-	      idx = (start
-		     + (code >= 0
-			? new_index (NULL, ic->candidate_index - start,
-				     end - start - 1, MPLIST_SYMBOL (args),
-				     NULL)
-			: MPLIST_INTEGER (args)));
-	      if (idx < 0)
-		{
-		  find_candidates_group (mtext_property_value (prop), -1,
-					 NULL, &end, NULL);
-		  idx = end - 1;
-		}
-	      else if (idx >= end
-		       && MPLIST_TAIL_P (MPLIST_NEXT (group)))
-		idx = 0;
-	    }
-	  else
-	    {
-	      int ingroup_index = idx - start;
-	      int len;
+  if (! im_info->vars && (pl = mplist__assq (plist, Mvariable)))
+    {
+      load_variables (im_info, MPLIST_PLIST (pl));
+      config_all_variables (im_info);
+      pl = mplist_pop (pl);
+      M17N_OBJECT_UNREF (pl);
+    }
 
-	      group = mtext_property_value (prop);
-	      len = mplist_length (group);
-	      if (code == '[')
-		{
-		  gindex--;
-		  if (gindex < 0)
-		    gindex = len - 1;;
-		}
-	      else
-		{
-		  gindex++;
-		  if (gindex >= len)
-		    gindex = 0;
-		}
-	      for (idx = 0; gindex > 0; gindex--, group = MPLIST_NEXT (group))
-		idx += (MPLIST_MTEXT_P (group)
-			? mtext_nchars (MPLIST_MTEXT (group))
-			: mplist_length (MPLIST_PLIST (group)));
-	      len = (MPLIST_MTEXT_P (group)
-		     ? mtext_nchars (MPLIST_MTEXT (group))
-		     : mplist_length (MPLIST_PLIST (group)));
-	      if (ingroup_index >= len)
-		ingroup_index = len - 1;
-	      idx += ingroup_index;
-	    }
-	  update_candidate (ic, prop, idx);
+  MPLIST_DO (plist, plist)
+    if (MPLIST_PLIST_P (plist))
+      {
+	MPlist *elt = MPLIST_PLIST (plist);
+	MSymbol key;
+
+	if (MFAILP (MPLIST_SYMBOL_P (elt)))
+	  continue;
+	key = MPLIST_SYMBOL (elt);
+	if (key == Mtitle)
+	  {
+	    if (im_info->title)
+	      continue;
+	    elt = MPLIST_NEXT (elt);
+	    if (MFAILP (MPLIST_MTEXT_P (elt)))
+	      continue;
+	    im_info->title = MPLIST_MTEXT (elt);
+	    M17N_OBJECT_REF (im_info->title);
+	  }
+	else if (key == Mmap)
+	  {
+	    pl = mplist__from_alist (MPLIST_NEXT (elt));
+	    if (MFAILP (pl))
+	      continue;
+	    if (! im_info->maps)
+	      im_info->maps = pl;
+	    else
+	      {
+		mplist__conc (im_info->maps, pl);
+		M17N_OBJECT_UNREF (pl);
+	      }
+	  }
+	else if (key == Mmacro)
+	  {
+	    if (! im_info->macros)
+	      im_info->macros = mplist ();
+	    MPLIST_DO (elt, MPLIST_NEXT (elt))
+	      {
+		if (MFAILP (MPLIST_PLIST_P (elt)))
+		  continue;
+		load_macros (im_info, MPLIST_PLIST (elt));
+	      }
+	  }
+	else if (key == Mmodule)
+	  {
+	    if (! im_info->externals)
+	      im_info->externals = mplist ();
+	    MPLIST_DO (elt, MPLIST_NEXT (elt))
+	      {
+		if (MFAILP (MPLIST_PLIST_P (elt)))
+		  continue;
+		load_external_module (im_info, MPLIST_PLIST (elt));
+	      }
+	  }
+	else if (key == Mstate)
+	  {
+	    MPLIST_DO (elt, MPLIST_NEXT (elt))
+	      {
+		MIMState *state;
+
+		if (MFAILP (MPLIST_PLIST_P (elt)))
+		  continue;
+		pl = MPLIST_PLIST (elt);
+		if (! im_info->states)
+		  im_info->states = mplist ();
+		state = load_state (im_info, MPLIST_PLIST (elt));
+		if (MFAILP (state))
+		  continue;
+		mplist_put (im_info->states, state->name, state);
+	      }
+	  }
+	else if (key == Minclude)
+	  {
+	    /* elt ::= include (tag1 tag2 ...) key item ... */
+	    MSymbol key;
+	    MInputMethodInfo *temp;
+
+	    elt = MPLIST_NEXT (elt);
+	    if (MFAILP (MPLIST_PLIST_P (elt)))
+	      continue;
+	    temp = get_im_info_by_tags (MPLIST_PLIST (elt));
+	    if (MFAILP (temp))
+	      continue;
+	    elt = MPLIST_NEXT (elt);
+	    if (MFAILP (MPLIST_SYMBOL_P (elt)))
+	      continue;
+	    key = MPLIST_SYMBOL (elt);
+	    elt = MPLIST_NEXT (elt);
+	    if (key == Mmap)
+	      {
+		if (! temp->maps || MPLIST_TAIL_P (temp->maps))
+		  continue;
+		if (! im_info->maps)
+		  im_info->maps = mplist ();
+		MPLIST_DO (pl, temp->maps)
+		  {
+		    p = MPLIST_VAL (pl);
+		    MPLIST_ADD_PLIST (im_info->maps, MPLIST_KEY (pl), p);
+		    M17N_OBJECT_REF (p);
+		  }
+	      }
+	    else if (key == Mmacro)
+	      {
+		if (! temp->macros || MPLIST_TAIL_P (temp->macros))
+		  continue;
+		if (! im_info->macros)
+		  im_info->macros = mplist ();
+		MPLIST_DO (pl, temp->macros)
+		  {
+		    p = MPLIST_VAL (pl);
+		    MPLIST_ADD_PLIST (im_info->macros, MPLIST_KEY (pl), p);
+		    M17N_OBJECT_REF (p);
+		  }
+	      }
+	    else if (key == Mstate)
+	      {
+		if (! temp->states || MPLIST_TAIL_P (temp->states))
+		  continue;
+		if (! im_info->states)
+		  im_info->states = mplist ();
+		MPLIST_DO (pl, temp->states)
+		  {
+		    MIMState *state = MPLIST_VAL (pl);
+
+		    mplist_add (im_info->states, MPLIST_KEY (pl), state);
+		    M17N_OBJECT_REF (state);
+		  }
+	      }
+	  }
+	else if (key == Mdescription)
+	  {
+	    if (im_info->description)
+	      continue;
+	    elt = MPLIST_NEXT (elt);
+	    if (! check_description (elt))
+	      continue;
+	    im_info->description = MPLIST_MTEXT (elt);
+	    M17N_OBJECT_REF (im_info->description);
+	  }
+      }
+  im_info->tick = time (NULL);
+}
+
+
+
+static int take_action_list (MInputContext *ic, MPlist *action_list);
+static void preedit_commit (MInputContext *ic);
+
+static void
+shift_state (MInputContext *ic, MSymbol state_name)
+{
+  MInputMethodInfo *im_info = (MInputMethodInfo *) ic->im->info;
+  MInputContextInfo *ic_info = (MInputContextInfo *) ic->info;
+  MIMState *orig_state = ic_info->state, *state;
+
+  /* Find a state to shift to.  If not found, shift to the initial
+     state.  */
+  if (state_name == Mt)
+    {
+      if (! ic_info->prev_state)
+	return;
+      state = ic_info->prev_state;
+    }
+  else if (state_name == Mnil)
+    {
+      state = (MIMState *) MPLIST_VAL (im_info->states);
+    }
+  else
+    {
+      state = (MIMState *) mplist_get (im_info->states, state_name);
+      if (! state)
+	state = (MIMState *) MPLIST_VAL (im_info->states);
+    }
+
+  MDEBUG_PRINT1 ("\n  [IM] (shift %s)", MSYMBOL_NAME (state->name));
+
+  /* Enter the new state.  */
+  ic_info->state = state;
+  ic_info->map = state->map;
+  ic_info->state_key_head = ic_info->key_head;
+  if (state == (MIMState *) MPLIST_VAL (im_info->states)
+      && orig_state)
+    /* We have shifted to the initial state.  */
+    preedit_commit (ic);
+  mtext_cpy (ic_info->preedit_saved, ic->preedit);
+  ic_info->state_pos = ic->cursor_pos;
+  if (state != orig_state)
+    {
+      if (state == (MIMState *) MPLIST_VAL (im_info->states))
+	ic_info->prev_state = NULL;
+      else
+	ic_info->prev_state = orig_state;
+
+      if (state->title)
+	ic->status = state->title;
+      else
+	ic->status = im_info->title;
+      ic->status_changed = 1;
+      if (ic_info->map == ic_info->state->map
+	  && ic_info->map->map_actions)
+	{
+	  MDEBUG_PRINT (" init-actions:");
+	  take_action_list (ic, ic_info->map->map_actions);
 	}
-      else if (name == Mshow)
-	ic->candidate_show = 1;
-      else if (name == Mhide)
-	ic->candidate_show = 0;
-      else if (name == Mdelete)
+    }
+}
+
+/* Find a candidate group that contains a candidate number INDEX from
+   PLIST.  Set START_INDEX to the first candidate number of the group,
+   END_INDEX to the last candidate number plus 1, GROUP_INDEX to the
+   candidate group number if they are non-NULL.  If INDEX is -1, find
+   the last candidate group.  */
+
+static MPlist *
+find_candidates_group (MPlist *plist, int index,
+		       int *start_index, int *end_index, int *group_index)
+{
+  int i = 0, gidx = 0, len;
+
+  MPLIST_DO (plist, plist)
+    {
+      if (MPLIST_MTEXT_P (plist))
+	len = mtext_nchars (MPLIST_MTEXT (plist));
+      else
+	len = mplist_length (MPLIST_PLIST (plist));
+      if (index < 0 ? MPLIST_TAIL_P (MPLIST_NEXT (plist))
+	  : i + len > index)
 	{
-	  int len = mtext_nchars (ic->preedit);
-	  int pos;
-	  int to;
+	  if (start_index)
+	    *start_index = i;
+	  if (end_index)
+	    *end_index = i + len;
+	  if (group_index)
+	    *group_index = gidx;
+	  return plist;
+	}
+      i += len;
+      gidx++;
+    }
+  return NULL;
+}
 
-	  if (MPLIST_SYMBOL_P (args)
-	      && (pos = surrounding_pos (MPLIST_SYMBOL (args))) != 0)
-	    {
-	      delete_surrounding_text (ic, pos);
-	    }
-	  else
-	    {
-	      to = (MPLIST_SYMBOL_P (args)
-		    ? new_index (ic, ic->cursor_pos, len, MPLIST_SYMBOL (args),
-				 ic->preedit)
-		    : MPLIST_INTEGER (args));
-	      if (to < 0)
-		to = 0;
-	      else if (to > len)
-		to = len;
-	      MDEBUG_PRINT1 ("(%d)", to - ic->cursor_pos);
-	      if (to < ic->cursor_pos)
-		preedit_delete (ic, to, ic->cursor_pos);
-	      else if (to > ic->cursor_pos)
-		preedit_delete (ic, ic->cursor_pos, to);
-	    }
+static void
+preedit_insert (MInputContext *ic, int pos, MText *mt, int c)
+{
+  MInputContextInfo *ic_info = ((MInputContext *) ic)->info;
+  MPlist *markers;
+  int nchars = mt ? mtext_nchars (mt) : 1;
+
+  if (mt)
+    mtext_ins (ic->preedit, pos, mt);
+  else
+    mtext_ins_char (ic->preedit, pos, c, 1);
+  MPLIST_DO (markers, ic_info->markers)
+    if (MPLIST_INTEGER (markers) > pos)
+      MPLIST_VAL (markers) = (void *) (MPLIST_INTEGER (markers) + nchars);
+  if (ic->cursor_pos >= pos)
+    ic->cursor_pos += nchars;
+  ic->preedit_changed = 1;
+}
+
+
+static void
+preedit_delete (MInputContext *ic, int from, int to)
+{
+  MInputContextInfo *ic_info = ((MInputContext *) ic)->info;
+  MPlist *markers;
+
+  mtext_del (ic->preedit, from, to);
+  MPLIST_DO (markers, ic_info->markers)
+    {
+      if (MPLIST_INTEGER (markers) > to)
+	MPLIST_VAL (markers)
+	  = (void *) (MPLIST_INTEGER (markers) - (to - from));
+      else if (MPLIST_INTEGER (markers) > from);
+	MPLIST_VAL (markers) = (void *) from;
+    }
+  if (ic->cursor_pos >= to)
+    ic->cursor_pos -= to - from;
+  else if (ic->cursor_pos > from)
+    ic->cursor_pos = from;
+  ic->preedit_changed = 1;
+}
+
+static void
+preedit_commit (MInputContext *ic)
+{
+  MInputContextInfo *ic_info = (MInputContextInfo *) ic->info;
+  int preedit_len = mtext_nchars (ic->preedit);
+
+  if (preedit_len > 0)
+    {
+      MPlist *p;
+
+      mtext_put_prop_values (ic->preedit, 0, mtext_nchars (ic->preedit),
+			     Mcandidate_list, NULL, 0);
+      mtext_put_prop_values (ic->preedit, 0, mtext_nchars (ic->preedit),
+			     Mcandidate_index, NULL, 0);
+      mtext_cat (ic->produced, ic->preedit);
+      if ((mdebug__flag & mdebug_mask)
+	  && mtext_nchars (ic->preedit) > 0)
+	{
+	  int i;
+
+	  MDEBUG_PRINT (" (produced");
+	  for (i = 0; i < mtext_nchars (ic->preedit); i++)
+	    MDEBUG_PRINT1 (" U+%04X", mtext_ref_char (ic->preedit, i));
+	  MDEBUG_PRINT (")");
 	}
-      else if (name == Mmove)
+      mtext_reset (ic->preedit);
+      mtext_reset (ic_info->preedit_saved);
+      MPLIST_DO (p, ic_info->markers)
+	MPLIST_VAL (p) = 0;
+      ic->cursor_pos = ic_info->state_pos = 0;
+      ic->preedit_changed = 1;
+    }
+  if (ic->candidate_list)
+    {
+      M17N_OBJECT_UNREF (ic->candidate_list);
+      ic->candidate_list = NULL;
+      ic->candidates_changed = MINPUT_CANDIDATES_LIST_CHANGED;
+      if (ic->candidate_show)
 	{
-	  int len = mtext_nchars (ic->preedit);
-	  int pos
-	    = (MPLIST_SYMBOL_P (args)
-	       ? new_index (ic, ic->cursor_pos, len, MPLIST_SYMBOL (args),
-			    ic->preedit)
-	       : MPLIST_INTEGER (args));
+	  ic->candidate_show = 0;
+	  ic->candidates_changed |= MINPUT_CANDIDATES_SHOW_CHANGED;
+	}
+    }
+  memmove (ic_info->keys, ic_info->keys + ic_info->key_head,
+	   sizeof (int) * (ic_info->used - ic_info->key_head));
+  ic_info->used -= ic_info->key_head;
+  ic_info->state_key_head = ic_info->key_head = 0;
+}
+
+static int
+new_index (MInputContext *ic, int current, int limit, MSymbol sym, MText *mt)
+{
+  int code = marker_code (sym);
+
+  if (mt && (code == '[' || code == ']'))
+    {
+      int pos = current;
+
+      if (code == '[' && current > 0)
+	{
+	  if (mtext_prop_range (mt, Mcandidate_list, pos - 1, &pos, NULL, 1)
+	      && pos > 0)
+	    current = pos;
+	}
+      else if (code == ']' && current < mtext_nchars (mt))
+	{
+	  if (mtext_prop_range (mt, Mcandidate_list, pos, NULL, &pos, 1))
+	    current = pos;
+	}
+      return current;
+    }
+  if (code >= 0)
+    return (code == '<' ? 0
+	    : code == '>' ? limit
+	    : code == '-' ? current - 1
+	    : code == '+' ? current + 1
+	    : code == '=' ? current
+	    : code - '0' > limit ? limit
+	    : code - '0');
+  if (! ic)  
+    return 0;
+  return (int) mplist_get (((MInputContextInfo *) ic->info)->markers, sym);
+}
+
+static void
+update_candidate (MInputContext *ic, MTextProperty *prop, int idx)
+{
+  int from = mtext_property_start (prop);
+  int to = mtext_property_end (prop);
+  int start;
+  MPlist *candidate_list = mtext_property_value (prop);
+  MPlist *group = find_candidates_group (candidate_list, idx, &start,
+					 NULL, NULL);
+  int ingroup_index = idx - start;
+  MText *mt;
+
+  preedit_delete (ic, from, to);
+  if (MPLIST_MTEXT_P (group))
+    {
+      mt = MPLIST_MTEXT (group);
+      preedit_insert (ic, from, NULL, mtext_ref_char (mt, ingroup_index));
+      to = from + 1;
+    }
+  else
+    {
+      int i;
+      MPlist *plist;
+
+      for (i = 0, plist = MPLIST_PLIST (group); i < ingroup_index;
+	   i++, plist = MPLIST_NEXT (plist));
+      mt = MPLIST_MTEXT (plist);
+      preedit_insert (ic, from, mt, 0);
+      to = from + mtext_nchars (mt);
+    }
+  mtext_put_prop (ic->preedit, from, to, Mcandidate_list, candidate_list);
+  mtext_put_prop (ic->preedit, from, to, Mcandidate_index, (void *) idx);
+  ic->cursor_pos = to;
+}
+
+static MCharset *
+get_select_charset (MInputContextInfo * ic_info)
+{
+  MPlist *plist = resolve_variable (ic_info, Mcandidates_charset);
+  MSymbol sym;
+
+  if (! MPLIST_VAL (plist))
+    return NULL;
+  sym = MPLIST_SYMBOL (plist);
+  if (sym == Mnil)
+    return NULL;
+  return MCHARSET (sym);
+}
+
+static MPlist *
+adjust_candidates (MPlist *plist, MCharset *charset)
+{
+  MPlist *pl;
+
+  /* plist ::= MTEXT ... | PLIST ... */
+  plist = mplist_copy (plist);
+  if (MPLIST_MTEXT_P (plist))
+    {
+      pl = plist;
+      while (! MPLIST_TAIL_P (pl))
+	{
+	  /* pl ::= MTEXT ... */
+	  MText *mt = MPLIST_MTEXT (pl);
+	  int mt_copied = 0;
+	  int i, c;
+
+	  for (i = mtext_nchars (mt) - 1; i >= 0; i--)
+	    {
+	      c = mtext_ref_char (mt, i);
+	      if (ENCODE_CHAR (charset, c) == MCHAR_INVALID_CODE)
+		{
+		  if (! mt_copied)
+		    {
+		      mt = mtext_dup (mt);
+		      mplist_set (pl, Mtext, mt);
+		      M17N_OBJECT_UNREF (mt);
+		      mt_copied = 1;
+		    }
+		  mtext_del (mt, i, i + 1);
+		}
+	    }
+	  if (mtext_len (mt) > 0)
+	    pl = MPLIST_NEXT (pl);
+	  else
+	    {
+	      mplist_pop (pl);
+	      M17N_OBJECT_UNREF (mt);
+	    }
+	}
+    }
+  else				/* MPLIST_PLIST_P (plist) */
+    {
+      pl = plist;
+      while (! MPLIST_TAIL_P (pl))
+	{
+	  /* pl ::= (MTEXT ...) ... */
+	  MPlist *p = MPLIST_PLIST (pl);
+	  int p_copied = 0;
+	  /* p ::= MTEXT ... */
+	  MPlist *p0 = p;
+	  int n = 0;
+
+	  while (! MPLIST_TAIL_P (p0))
+	    {
+	      MText *mt = MPLIST_MTEXT (p0);
+	      int i, c;
+
+	      for (i = mtext_nchars (mt) - 1; i >= 0; i--)
+		{
+		  c = mtext_ref_char (mt, i);
+		  if (ENCODE_CHAR (charset, c) == MCHAR_INVALID_CODE)
+		    break;
+		}
+	      if (i < 0)
+		{
+		  p0 = MPLIST_NEXT (p0);
+		  n++;
+		}
+	      else
+		{
+		  if (! p_copied)
+		    {
+		      p = mplist_copy (p);
+		      mplist_set (pl, Mplist, p);
+		      M17N_OBJECT_UNREF (p);
+		      p_copied = 1;
+		      p0 = p;
+		      while (n-- > 0)
+			p0 = MPLIST_NEXT (p0);
+		    }	  
+		  mplist_pop (p0);
+		  M17N_OBJECT_UNREF (mt);
+		}
+	    }
+	  if (! MPLIST_TAIL_P (p))
+	    pl = MPLIST_NEXT (pl);
+	  else
+	    {
+	      mplist_pop (pl);
+	      M17N_OBJECT_UNREF (p);
+	    }
+	}
+    }
+  if (MPLIST_TAIL_P (plist))
+    {
+      M17N_OBJECT_UNREF (plist);
+      return NULL;
+    }      
+  return plist;
+}
+
+static MPlist *
+get_candidate_list (MInputContextInfo *ic_info, MPlist *args)
+{
+  MCharset *charset = get_select_charset (ic_info);
+  MPlist *plist;
+  int column;
+  int i, len;
+
+  plist = resolve_variable (ic_info, Mcandidates_group_size);
+  column = MPLIST_INTEGER (plist);
+
+  plist = MPLIST_PLIST (args);
+  if (charset)
+    {
+      if (! (plist = adjust_candidates (plist, charset)))
+	return NULL;
+    }
+  else
+    M17N_OBJECT_REF (plist);
+
+  if (column > 0)
+    {
+      if (MPLIST_MTEXT_P (plist))
+	{
+	  MText *mt = MPLIST_MTEXT (plist);
+	  MPlist *next = MPLIST_NEXT (plist);
+
+	  if (MPLIST_TAIL_P (next))
+	    M17N_OBJECT_REF (mt);
+	  else
+	    {
+	      mt = mtext_dup (mt);
+	      while (! MPLIST_TAIL_P (next))
+		{
+		  mt = mtext_cat (mt, MPLIST_MTEXT (next));
+		  next = MPLIST_NEXT (next);
+		}
+	    }
+	  M17N_OBJECT_UNREF (plist);
+	  plist = mplist ();
+	  len = mtext_nchars (mt);
+	  if (len <= column)
+	    mplist_add (plist, Mtext, mt);
+	  else
+	    {
+	      for (i = 0; i < len; i += column)
+		{
+		  int to = (i + column < len ? i + column : len);
+		  MText *sub = mtext_copy (mtext (), 0, mt, i, to);
+						       
+		  mplist_add (plist, Mtext, sub);
+		  M17N_OBJECT_UNREF (sub);
+		}
+	    }
+	  M17N_OBJECT_UNREF (mt);
+	}
+      else		/* MPLIST_PLIST_P (plist) */
+	{
+	  MPlist *pl = MPLIST_PLIST (plist), *p;
+	  MPlist *next = MPLIST_NEXT (plist);
+	  int j;
+
+	  if (MPLIST_TAIL_P (next))
+	    M17N_OBJECT_REF (pl);
+	  else
+	    {
+	      pl = mplist_copy (pl);
+	      while (! MPLIST_TAIL_P (next))
+		{
+		  p = mplist_copy (MPLIST_PLIST (next));
+		  pl = mplist__conc (pl, p);
+		  M17N_OBJECT_UNREF (p);
+		  next = MPLIST_NEXT (next);
+		}
+	    }
+	  M17N_OBJECT_UNREF (plist);
+	  plist = mplist ();
+	  len = mplist_length (pl);
+	  if (len <= column)
+	    mplist_add (plist, Mplist, pl);
+	  else
+	    {
+	      MPlist *p0 = pl;
+
+	      for (i = 0; i < len; i += column)
+		{
+		  p = mplist ();
+		  mplist_add (plist, Mplist, p);
+		  M17N_OBJECT_UNREF (p);
+		  for (j = 0; j < column && i + j < len; j++)
+		    {
+		      p = mplist_add (p, Mtext, MPLIST_VAL (p0));
+		      p0 = MPLIST_NEXT (p0);
+		    }
+		}
+	    }
+	  M17N_OBJECT_UNREF (pl);
+	}
+    }
+
+  return plist;
+}
+
+
+static MPlist *
+regularize_action (MPlist *action_list, MInputContextInfo *ic_info)
+{
+  MPlist *action = NULL;
+  MSymbol name;
+  MPlist *args;
+
+  if (MPLIST_SYMBOL_P (action_list))
+    {
+      MSymbol var = MPLIST_SYMBOL (action_list);
+      MPlist *p;
+
+      MPLIST_DO (p, ic_info->vars)
+	if (MPLIST_SYMBOL (MPLIST_PLIST (p)) == var)
+	  break;
+      if (MPLIST_TAIL_P (p))
+	return NULL;
+      action = MPLIST_NEXT (MPLIST_PLIST (p));
+      mplist_set (action_list, MPLIST_KEY (action), MPLIST_VAL (action));
+    }
+
+  if (MPLIST_PLIST_P (action_list))
+    {
+      action = MPLIST_PLIST (action_list);
+      if (MPLIST_SYMBOL_P (action))
+	{
+	  name = MPLIST_SYMBOL (action);
+	  args = MPLIST_NEXT (action);
+	  if (name == Minsert
+	      && MPLIST_PLIST_P (args))
+	    mplist_set (action, Msymbol, M_candidates);
+	}
+      else if (MPLIST_MTEXT_P (action) || MPLIST_PLIST_P (action))
+	{
+	  action = mplist ();
+	  mplist_push (action, Mplist, MPLIST_VAL (action_list));
+	  mplist_push (action, Msymbol, M_candidates);
+	  mplist_set (action_list, Mplist, action);
+	  M17N_OBJECT_UNREF (action);
+	}
+    }
+  else if (MPLIST_MTEXT_P (action_list) || MPLIST_INTEGER_P (action_list))
+    {
+      action = mplist ();
+      mplist_push (action, MPLIST_KEY (action_list), MPLIST_VAL (action_list));
+      mplist_push (action, Msymbol, Minsert);
+      mplist_set (action_list, Mplist, action);
+      M17N_OBJECT_UNREF (action);
+    }
+  return action;
+}
+
+/* Perform list of actions in ACTION_LIST for the current input
+   context IC.  If all actions are performed without error, return 0.
+   Otherwise, return -1.  */
+
+static int
+take_action_list (MInputContext *ic, MPlist *action_list)
+{
+  MInputContextInfo *ic_info = (MInputContextInfo *) ic->info;
+  MPlist *candidate_list = ic->candidate_list;
+  int candidate_index = ic->candidate_index;
+  int candidate_show = ic->candidate_show;
+  MTextProperty *prop;
+
+  MPLIST_DO (action_list, action_list)
+    {
+      MPlist *action = regularize_action (action_list, ic_info);
+      MSymbol name;
+      MPlist *args;
+
+      if (! action)
+	continue;
+      name = MPLIST_SYMBOL (action);
+      args = MPLIST_NEXT (action);
+
+      MDEBUG_PRINT1 (" %s", MSYMBOL_NAME (name));
+      if (name == Minsert)
+	{
+	  if (MPLIST_SYMBOL_P (args))
+	    {
+	      args = resolve_variable (ic_info, MPLIST_SYMBOL (args));
+	      if (! MPLIST_MTEXT_P (args) && ! MPLIST_INTEGER_P (args))
+		continue;
+	    }
+	  if (MPLIST_MTEXT_P (args))
+	    preedit_insert (ic, ic->cursor_pos, MPLIST_MTEXT (args), 0);
+	  else			/* MPLIST_INTEGER_P (args)) */
+	    preedit_insert (ic, ic->cursor_pos, NULL, MPLIST_INTEGER (args));
+	}
+      else if (name == M_candidates)
+	{
+	  MPlist *plist = get_candidate_list (ic_info, args);
+	  int len;
+
+	  if (! plist)
+	    continue;
+	  if (MPLIST_MTEXT_P (plist))
+	    {
+	      preedit_insert (ic, ic->cursor_pos, NULL,
+			      mtext_ref_char (MPLIST_MTEXT (plist), 0));
+	      len = 1;
+	    }
+	  else
+	    {
+	      MText * mt = MPLIST_MTEXT (MPLIST_PLIST (plist));
+
+	      preedit_insert (ic, ic->cursor_pos, mt, 0);
+	      len = mtext_nchars (mt);
+	    }
+	  mtext_put_prop (ic->preedit,
+			  ic->cursor_pos - len, ic->cursor_pos,
+			  Mcandidate_list, plist);
+	  mtext_put_prop (ic->preedit,
+			  ic->cursor_pos - len, ic->cursor_pos,
+			  Mcandidate_index, (void *) 0);
+	  M17N_OBJECT_UNREF (plist);
+	}
+      else if (name == Mselect)
+	{
+	  int start, end;
+	  int code, idx, gindex;
+	  int pos = ic->cursor_pos;
+	  MPlist *group;
+
+	  if (pos == 0
+	      || ! (prop = mtext_get_property (ic->preedit, pos - 1,
+					       Mcandidate_list)))
+	    continue;
+	  if (MPLIST_SYMBOL_P (args))
+	    {
+	      code = marker_code (MPLIST_SYMBOL (args));
+	      if (code < 0)
+		continue;
+	    }
+	  else
+	    code = -1;
+	  idx = (int) mtext_get_prop (ic->preedit, pos - 1, Mcandidate_index);
+	  group = find_candidates_group (mtext_property_value (prop), idx,
+					 &start, &end, &gindex);
+
+	  if (code != '[' && code != ']')
+	    {
+	      idx = (start
+		     + (code >= 0
+			? new_index (NULL, ic->candidate_index - start,
+				     end - start - 1, MPLIST_SYMBOL (args),
+				     NULL)
+			: MPLIST_INTEGER (args)));
+	      if (idx < 0)
+		{
+		  find_candidates_group (mtext_property_value (prop), -1,
+					 NULL, &end, NULL);
+		  idx = end - 1;
+		}
+	      else if (idx >= end
+		       && MPLIST_TAIL_P (MPLIST_NEXT (group)))
+		idx = 0;
+	    }
+	  else
+	    {
+	      int ingroup_index = idx - start;
+	      int len;
+
+	      group = mtext_property_value (prop);
+	      len = mplist_length (group);
+	      if (code == '[')
+		{
+		  gindex--;
+		  if (gindex < 0)
+		    gindex = len - 1;;
+		}
+	      else
+		{
+		  gindex++;
+		  if (gindex >= len)
+		    gindex = 0;
+		}
+	      for (idx = 0; gindex > 0; gindex--, group = MPLIST_NEXT (group))
+		idx += (MPLIST_MTEXT_P (group)
+			? mtext_nchars (MPLIST_MTEXT (group))
+			: mplist_length (MPLIST_PLIST (group)));
+	      len = (MPLIST_MTEXT_P (group)
+		     ? mtext_nchars (MPLIST_MTEXT (group))
+		     : mplist_length (MPLIST_PLIST (group)));
+	      if (ingroup_index >= len)
+		ingroup_index = len - 1;
+	      idx += ingroup_index;
+	    }
+	  update_candidate (ic, prop, idx);
+	}
+      else if (name == Mshow)
+	ic->candidate_show = 1;
+      else if (name == Mhide)
+	ic->candidate_show = 0;
+      else if (name == Mdelete)
+	{
+	  int len = mtext_nchars (ic->preedit);
+	  int pos;
+	  int to;
+
+	  if (MPLIST_SYMBOL_P (args)
+	      && (pos = surrounding_pos (MPLIST_SYMBOL (args))) != 0)
+	    {
+	      delete_surrounding_text (ic, pos);
+	    }
+	  else
+	    {
+	      to = (MPLIST_SYMBOL_P (args)
+		    ? new_index (ic, ic->cursor_pos, len, MPLIST_SYMBOL (args),
+				 ic->preedit)
+		    : MPLIST_INTEGER (args));
+	      if (to < 0)
+		to = 0;
+	      else if (to > len)
+		to = len;
+	      MDEBUG_PRINT1 ("(%d)", to - ic->cursor_pos);
+	      if (to < ic->cursor_pos)
+		preedit_delete (ic, to, ic->cursor_pos);
+	      else if (to > ic->cursor_pos)
+		preedit_delete (ic, ic->cursor_pos, to);
+	    }
+	}
+      else if (name == Mmove)
+	{
+	  int len = mtext_nchars (ic->preedit);
+	  int pos
+	    = (MPLIST_SYMBOL_P (args)
+	       ? new_index (ic, ic->cursor_pos, len, MPLIST_SYMBOL (args),
+			    ic->preedit)
+	       : MPLIST_INTEGER (args));
+
+	  if (pos < 0)
+	    pos = 0;
+	  else if (pos > len)
+	    pos = len;
+	  if (pos != ic->cursor_pos)
+	    {
+	      ic->cursor_pos = pos;
+	      ic->preedit_changed = 1;
+	    }
+	}
+      else if (name == Mmark)
+	{
+	  int code = marker_code (MPLIST_SYMBOL (args));
+
+	  if (code < 0)
+	    mplist_put (ic_info->markers, MPLIST_SYMBOL (args),
+			(void *) ic->cursor_pos);
+	}
+      else if (name == Mpushback)
+	{
+	  if (MPLIST_INTEGER_P (args))
+	    {
+	      int num = MPLIST_INTEGER (args);
+
+	      if (num > 0)
+		ic_info->key_head -= num;
+	      else
+		ic_info->key_head = num;
+	      if (ic_info->key_head > ic_info->used)
+		ic_info->key_head = ic_info->used;
+	    }
+	  else if (MPLIST_MTEXT_P (args))
+	    {
+	      MText *mt = MPLIST_MTEXT (args);
+	      int i, len = mtext_nchars (mt);
+	      MSymbol key;
+
+	      ic_info->key_head--;
+	      for (i = 0; i < len; i++)
+		{
+		  key = one_char_symbol[MTEXT_DATA (mt)[i]];
+		  if (ic_info->key_head + i < ic_info->used)
+		    ic_info->keys[ic_info->key_head + i] = key;
+		  else
+		    MLIST_APPEND1 (ic_info, keys, key, MERROR_IM);
+		}
+	    }
+	  else
+	    {
+	      MPlist *plist = MPLIST_PLIST (args), *pl;
+	      int i = 0;
+	      MSymbol key;
+
+	      ic_info->key_head--;
+
+	      MPLIST_DO (pl, plist)
+		{
+		  key = MPLIST_SYMBOL (pl);
+		  if (ic_info->key_head < ic_info->used)
+		    ic_info->keys[ic_info->key_head + i] = key;
+		  else
+		    MLIST_APPEND1 (ic_info, keys, key, MERROR_IM);
+		  i++;
+		}
+	    }
+	}
+      else if (name == Mcall)
+	{
+	  MInputMethodInfo *im_info = (MInputMethodInfo *) ic->im->info;
+	  MIMExternalFunc func = NULL;
+	  MSymbol module, func_name;
+	  MPlist *func_args, *val;
+	  int ret = 0;
+
+	  module = MPLIST_SYMBOL (args);
+	  args = MPLIST_NEXT (args);
+	  func_name = MPLIST_SYMBOL (args);
+
+	  if (im_info->externals)
+	    {
+	      MIMExternalModule *external
+		= (MIMExternalModule *) mplist_get (im_info->externals,
+						    module);
+	      if (external)
+		func = (MIMExternalFunc) mplist_get (external->func_list,
+						     func_name);
+	    }
+	  if (! func)
+	    continue;
+	  func_args = mplist ();
+	  mplist_add (func_args, Mt, ic);
+	  MPLIST_DO (args, MPLIST_NEXT (args))
+	    {
+	      int code;
+
+	      if (MPLIST_KEY (args) == Msymbol
+		  && MPLIST_KEY (args) != Mnil
+		  && (code = marker_code (MPLIST_SYMBOL (args))) >= 0)
+		{
+		  code = new_index (ic, ic->cursor_pos, 
+				    mtext_nchars (ic->preedit),
+				    MPLIST_SYMBOL (args), ic->preedit);
+		  mplist_add (func_args, Minteger, (void *) code);
+		}
+	      else
+		mplist_add (func_args, MPLIST_KEY (args), MPLIST_VAL (args));
+	    }
+	  val = (func) (func_args);
+	  M17N_OBJECT_UNREF (func_args);
+	  if (val && ! MPLIST_TAIL_P (val))
+	    ret = take_action_list (ic, val);
+	  M17N_OBJECT_UNREF (val);
+	  if (ret < 0)
+	    return ret;
+	}
+      else if (name == Mshift)
+	{
+	  shift_state (ic, MPLIST_SYMBOL (args));
+	}
+      else if (name == Mundo)
+	{
+	  int intarg = (MPLIST_TAIL_P (args)
+			? ic_info->used - 2
+			: integer_value (ic, args, NULL, 0));
+
+	  mtext_reset (ic->preedit);
+	  mtext_reset (ic_info->preedit_saved);
+	  ic->cursor_pos = ic_info->state_pos = 0;
+	  ic_info->state_key_head = ic_info->key_head = 0;
+
+	  if (intarg < 0)
+	    ic_info->used += intarg;
+	  else
+	    ic_info->used = intarg;
+	  shift_state (ic, Mnil);
+	  break;
+	}
+      else if (name == Mset || name == Madd || name == Msub
+	       || name == Mmul || name == Mdiv)
+	{
+	  MSymbol sym = MPLIST_SYMBOL (args);
+	  int val1, val2;
+	  MPlist *value;
+	  char *op;
+
+	  val1 = integer_value (ic, args, &value, 0);
+	  args = MPLIST_NEXT (args);
+	  val2 = resolve_expression (ic, args);
+	  if (name == Mset)
+	    val1 = val2, op = "=";
+	  else if (name == Madd)
+	    val1 += val2, op = "+=";
+	  else if (name == Msub)
+	    val1 -= val2, op = "-=";
+	  else if (name == Mmul)
+	    val1 *= val2, op = "*=";
+	  else
+	    val1 /= val2, op = "/=";
+	  MDEBUG_PRINT4 ("(%s %s 0x%X(%d))",
+			 MSYMBOL_NAME (sym), op, val1, val1);
+	  if (value)
+	    mplist_set (value, Minteger, (void *) val1);
+	}
+      else if (name == Mequal || name == Mless || name == Mgreater
+	       || name == Mless_equal || name == Mgreater_equal)
+	{
+	  int val1, val2;
+	  MPlist *actions1, *actions2;
+	  int ret = 0;
+
+	  val1 = resolve_expression (ic, args);
+	  args = MPLIST_NEXT (args);
+	  val2 = resolve_expression (ic, args);
+	  args = MPLIST_NEXT (args);
+	  actions1 = MPLIST_PLIST (args);
+	  args = MPLIST_NEXT (args);
+	  if (MPLIST_TAIL_P (args))
+	    actions2 = NULL;
+	  else
+	    actions2 = MPLIST_PLIST (args);
+	  MDEBUG_PRINT3 ("(%d %s %d)? ", val1, MSYMBOL_NAME (name), val2);
+	  if (name == Mequal ? val1 == val2
+	      : name == Mless ? val1 < val2
+	      : name == Mgreater ? val1 > val2
+	      : name == Mless_equal ? val1 <= val2
+	      : val1 >= val2)
+	    {
+	      MDEBUG_PRINT ("ok");
+	      ret = take_action_list (ic, actions1);
+	    }
+	  else
+	    {
+	      MDEBUG_PRINT ("no");
+	      if (actions2)
+		ret = take_action_list (ic, actions2);
+	    }
+	  if (ret < 0)
+	    return ret;
+	}
+      else if (name == Mcond)
+	{
+	  int idx = 0;
+
+	  MPLIST_DO (args, args)
+	    {
+	      MPlist *cond;
+
+	      idx++;
+	      if (! MPLIST_PLIST (args))
+		continue;
+	      cond = MPLIST_PLIST (args);
+	      if (resolve_expression (ic, cond) != 0)
+		{
+		  MDEBUG_PRINT1 ("(%dth)", idx);
+		  if (take_action_list (ic, MPLIST_NEXT (cond)) < 0)
+		    return -1;;
+		  break;
+		}
+	    }
+	}
+      else if (name == Mcommit)
+	{
+	  preedit_commit (ic);
+	}
+      else if (name == Munhandle)
+	{
+	  preedit_commit (ic);
+	  return -1;
+	}
+      else
+	{
+	  MInputMethodInfo *im_info = (MInputMethodInfo *) ic->im->info;
+	  MPlist *actions;
+
+	  if (im_info->macros
+	      && (actions = mplist_get (im_info->macros, name)))
+	    {
+	      if (take_action_list (ic, actions) < 0)
+		return -1;
+	    };
+	}
+    }
+
+  M17N_OBJECT_UNREF (ic->candidate_list);
+  if (ic->cursor_pos > 0
+      && (prop = mtext_get_property (ic->preedit, ic->cursor_pos - 1,
+				     Mcandidate_list)))
+    {
+      ic->candidate_list = mtext_property_value (prop);
+      M17N_OBJECT_REF (ic->candidate_list);
+      ic->candidate_index
+	= (int) mtext_get_prop (ic->preedit, ic->cursor_pos - 1,
+				Mcandidate_index);
+      ic->candidate_from = mtext_property_start (prop);
+      ic->candidate_to = mtext_property_end (prop);
+    }
+
+  if (candidate_list != ic->candidate_list)
+    ic->candidates_changed |= MINPUT_CANDIDATES_LIST_CHANGED;
+  if (candidate_index != ic->candidate_index)
+    ic->candidates_changed |= MINPUT_CANDIDATES_INDEX_CHANGED;
+  if (candidate_show != ic->candidate_show)
+    ic->candidates_changed |= MINPUT_CANDIDATES_SHOW_CHANGED;    
+  return 0;
+}
+
+
+/* Handle the input key KEY in the current state and map specified in
+   the input context IC.  If KEY is handled correctly, return 0.
+   Otherwise, return -1.  */
+
+static int
+handle_key (MInputContext *ic)
+{
+  MInputMethodInfo *im_info = (MInputMethodInfo *) ic->im->info;
+  MInputContextInfo *ic_info = (MInputContextInfo *) ic->info;
+  MIMMap *map = ic_info->map;
+  MIMMap *submap = NULL;
+  MSymbol key = ic_info->keys[ic_info->key_head];
+  MSymbol alias = Mnil;
+  int i;
+
+  MDEBUG_PRINT2 ("  [IM] handle `%s' in state %s", 
+		 msymbol_name (key), MSYMBOL_NAME (ic_info->state->name));
+
+  if (map->submaps)
+    {
+      submap = mplist_get (map->submaps, key);
+      alias = key;
+      while (! submap
+	     && (alias = msymbol_get (alias, M_key_alias))
+	     && alias != key)
+	submap = mplist_get (map->submaps, alias);
+    }
+
+  if (submap)
+    {
+      if (! alias || alias == key)
+	MDEBUG_PRINT (" submap-found");
+      else
+	MDEBUG_PRINT1 (" submap-found (by alias `%s')", MSYMBOL_NAME (alias));
+      mtext_cpy (ic->preedit, ic_info->preedit_saved);
+      ic->preedit_changed = 1;
+      ic->cursor_pos = ic_info->state_pos;
+      ic_info->key_head++;
+      ic_info->map = map = submap;
+      if (map->map_actions)
+	{
+	  MDEBUG_PRINT (" map-actions:");
+	  if (take_action_list (ic, map->map_actions) < 0)
+	    {
+	      MDEBUG_PRINT ("\n");
+	      return -1;
+	    }
+	}
+      else if (map->submaps)
+	{
+	  for (i = ic_info->state_key_head; i < ic_info->key_head; i++)
+	    {
+	      MSymbol key = ic_info->keys[i];
+	      char *name = msymbol_name (key);
+
+	      if (! name[0] || ! name[1])
+		mtext_ins_char (ic->preedit, ic->cursor_pos++, name[0], 1);
+	    }
+	}
+
+      /* If this is the terminal map or we have shifted to another
+	 state, perform branch actions (if any).  */
+      if (! map->submaps || map != ic_info->map)
+	{
+	  if (map->branch_actions)
+	    {
+	      MDEBUG_PRINT (" branch-actions:");
+	      if (take_action_list (ic, map->branch_actions) < 0)
+		{
+		  MDEBUG_PRINT ("\n");
+		  return -1;
+		}
+	    }
+	  /* If MAP is still not the root map, shift to the current
+	     state.  */
+	  if (ic_info->map != ic_info->state->map)
+	    shift_state (ic, ic_info->state->name);
+	}
+    }
+  else
+    {
+      /* MAP can not handle KEY.  */
+
+      /* If MAP is the root map of the initial state, it means that
+	 the current input method can not handle KEY.  */
+      if (map == ((MIMState *) MPLIST_VAL (im_info->states))->map)
+	{
+	  MDEBUG_PRINT (" unhandled\n");
+	  return -1;
+	}
+
+      if (map != ic_info->state->map)
+	{
+	  /* If MAP is not the root map... */
+	  /* If MAP has branch actions, perform them.  */
+	  if (map->branch_actions)
+	    {
+	      MDEBUG_PRINT (" branch-actions:");
+	      if (take_action_list (ic, map->branch_actions) < 0)
+		{
+		  MDEBUG_PRINT ("\n");
+		  return -1;
+		}
+	    }
+	  /* If MAP is still not the root map, shift to the current
+	     state. */
+	  if (ic_info->map != ic_info->state->map)
+	    shift_state (ic, ic_info->state->name);
+	}
+      else
+	{
+	  /* MAP is the root map, perform branch actions (if any) or
+	     shift to the initial state.  */
+	  if (map->branch_actions)
+	    {
+	      MDEBUG_PRINT (" branch-actions:");
+	      if (take_action_list (ic, map->branch_actions) < 0)
+		{
+		  MDEBUG_PRINT ("\n");
+		  return -1;
+		}
+	    }
+	  else
+	    shift_state (ic, Mnil);
+	}
+    }
+  MDEBUG_PRINT ("\n");
+  return 0;
+}
+
+/* Initialize IC->ic_info.  */
+
+static void
+init_ic_info (MInputContext *ic)
+{
+  MInputMethodInfo *im_info = ic->im->info;
+  MInputContextInfo *ic_info = ic->info;
+  MPlist *plist;
+  
+  MLIST_INIT1 (ic_info, keys, 8);;
+
+  ic_info->markers = mplist ();
+
+  ic_info->vars = mplist ();
+  if (im_info->configured_vars)
+    MPLIST_DO (plist, im_info->configured_vars)
+      {
+	MPlist *pl = MPLIST_PLIST (plist);
+	MSymbol name = MPLIST_SYMBOL (pl);
+
+	pl = MPLIST_NEXT (MPLIST_NEXT (MPLIST_NEXT (pl)));
+	if (MPLIST_KEY (pl) != Mt)
+	  {
+	    MPlist *p = mplist ();
+
+	    mplist_push (ic_info->vars, Mplist, p);
+	    M17N_OBJECT_UNREF (p);
+	    mplist_add (p, Msymbol, name);
+	    mplist_add (p, MPLIST_KEY (pl), MPLIST_VAL (pl));
+	  }
+      }
+
+  if (im_info->externals)
+    {
+      MPlist *func_args = mplist (), *plist;
+
+      mplist_add (func_args, Mt, ic);
+      MPLIST_DO (plist, im_info->externals)
+	{
+	  MIMExternalModule *external = MPLIST_VAL (plist);
+	  MIMExternalFunc func
+	    = (MIMExternalFunc) mplist_get (external->func_list, Minit);
+
+	  if (func)
+	    (func) (func_args);
+	}
+      M17N_OBJECT_UNREF (func_args);
+    }
+
+  ic_info->preedit_saved = mtext ();
+  ic_info->tick = im_info->tick;
+}
+
+/* Finalize IC->ic_info.  */
+
+static void
+fini_ic_info (MInputContext *ic)
+{
+  MInputMethodInfo *im_info = ic->im->info;
+  MInputContextInfo *ic_info = ic->info;
+
+  if (im_info->externals)
+    {
+      MPlist *func_args = mplist (), *plist;
+
+      mplist_add (func_args, Mt, ic);
+      MPLIST_DO (plist, im_info->externals)
+	{
+	  MIMExternalModule *external = MPLIST_VAL (plist);
+	  MIMExternalFunc func
+	    = (MIMExternalFunc) mplist_get (external->func_list, Mfini);
+
+	  if (func)
+	    (func) (func_args);
+	}
+      M17N_OBJECT_UNREF (func_args);
+    }
+
+  MLIST_FREE1 (ic_info, keys);
+  M17N_OBJECT_UNREF (ic_info->preedit_saved);
+  M17N_OBJECT_UNREF (ic_info->markers);
+  M17N_OBJECT_UNREF (ic_info->vars);
+  M17N_OBJECT_UNREF (ic_info->preceding_text);
+  M17N_OBJECT_UNREF (ic_info->following_text);
+
+  memset (ic_info, 0, sizeof (MInputContextInfo));
+}
+
+static void
+re_init_ic (MInputContext *ic, int reload)
+{
+  MInputMethodInfo *im_info = (MInputMethodInfo *) ic->im->info;
+  MInputContextInfo *ic_info = (MInputContextInfo *) ic->info;
+  int status_changed, preedit_changed, cursor_pos_changed, candidates_changed;
+
+  status_changed = ic_info->state != (MIMState *) MPLIST_VAL (im_info->states);
+  preedit_changed = mtext_nchars (ic->preedit) > 0;
+  cursor_pos_changed = ic->cursor_pos > 0;
+  candidates_changed = 0;
+  if (ic->candidate_list)
+    {
+      candidates_changed |= MINPUT_CANDIDATES_LIST_CHANGED;
+      M17N_OBJECT_UNREF (ic->candidate_list);
+    }
+  if (ic->candidate_show)
+    {
+      candidates_changed |= MINPUT_CANDIDATES_SHOW_CHANGED;
+      ic->candidate_show = 0;
+    }
+  if (ic->candidate_index > 0)
+    {
+      candidates_changed |= MINPUT_CANDIDATES_INDEX_CHANGED;
+      ic->candidate_index = 0;
+      ic->candidate_from = ic->candidate_to = 0;
+    }
+  if (mtext_nchars (ic->produced) > 0)
+    mtext_reset (ic->produced);
+  if (mtext_nchars (ic->preedit) > 0)
+    mtext_reset (ic->preedit);
+  ic->cursor_pos = 0;
+  M17N_OBJECT_UNREF (ic->plist);
+  ic->plist = mplist ();
+
+  fini_ic_info (ic);
+  if (reload)
+    reload_im_info (im_info);
+  init_ic_info (ic);
+  shift_state (ic, Mnil);
+  ic->status_changed = status_changed;
+  ic->preedit_changed = preedit_changed;
+  ic->cursor_pos_changed = cursor_pos_changed;
+  ic->candidates_changed = candidates_changed;
+}
+
+static void
+reset_ic (MInputContext *ic, MSymbol ignore)
+{
+  MDEBUG_PRINT ("\n  [IM] reset\n");
+  re_init_ic (ic, 0);
+}
+
+static int
+open_im (MInputMethod *im)
+{
+  MInputMethodInfo *im_info = get_im_info (im->language, im->name, Mnil, Mnil);
+
+  if (! im_info)
+    MERROR (MERROR_IM, -1);
+  im->info = im_info;
+
+  return 0;
+}
+
+static void
+close_im (MInputMethod *im)
+{
+  im->info = NULL;
+}
+
+static int
+create_ic (MInputContext *ic)
+{
+  MInputContextInfo *ic_info;
+
+  MSTRUCT_CALLOC (ic_info, MERROR_IM);
+  ic->info = ic_info;
+  init_ic_info (ic);
+  shift_state (ic, Mnil);
+  return 0;
+}
+
+static void
+destroy_ic (MInputContext *ic)
+{
+  fini_ic_info (ic);
+  free (ic->info);
+}
+
+static int
+check_reload (MInputContext *ic, MSymbol key)
+{
+  MInputMethodInfo *im_info = ic->im->info;
+  MPlist *plist = resolve_command (im_info->configured_cmds, Mat_reload);
+
+  if (! plist)
+    {
+      plist = resolve_command (global_info->configured_cmds, Mat_reload);
+      if (! plist)
+	return 0;
+    }
+  MPLIST_DO (plist, plist)
+    {
+      MSymbol this_key, alias;
+
+      if (MPLIST_MTEXT_P (plist))
+	{
+	  MText *mt = MPLIST_MTEXT (plist);
+	  int c = mtext_ref_char (mt, 0);
+
+	  if (c >= 256)
+	    continue;
+	  this_key = one_char_symbol[c];
+	}
+      else
+	{
+	  MPlist *pl = MPLIST_PLIST (plist);
+      
+	  this_key = MPLIST_SYMBOL (pl);
+	}
+      alias = this_key;
+      while (alias != key 
+	     && (alias = msymbol_get (alias, M_key_alias))
+	     && alias != this_key);
+      if (alias == key)
+	break;
+    }
+  if (MPLIST_TAIL_P (plist))
+    return 0;
+
+  MDEBUG_PRINT ("\n  [IM] reload");
+  re_init_ic (ic, 1);
+  return 1;
+}
+
+
+/** Handle the input key KEY in the current state and map of IC->info.
+    If KEY is handled but no text is produced, return 0, otherwise
+    return 1.
+
+    Ignore ARG.  */
+
+static int
+filter (MInputContext *ic, MSymbol key, void *arg)
+{
+  MInputMethodInfo *im_info = (MInputMethodInfo *) ic->im->info;
+  MInputContextInfo *ic_info = (MInputContextInfo *) ic->info;
+  int i = 0;
+
+  if (check_reload (ic, key))
+    return 0;
+
+  if (! ic_info->state)
+    {
+      ic_info->key_unhandled = 1;
+      return 0;
+    }
+  mtext_reset (ic->produced);
+  ic->status_changed = ic->preedit_changed = ic->candidates_changed = 0;
+  M17N_OBJECT_UNREF (ic_info->preceding_text);
+  M17N_OBJECT_UNREF (ic_info->following_text);
+  MLIST_APPEND1 (ic_info, keys, key, MERROR_IM);
+  ic_info->key_unhandled = 0;
+
+  do {
+    if (handle_key (ic) < 0)
+      {
+	/* KEY was not handled.  Delete it from the current key sequence.  */
+	if (ic_info->used > 0)
+	  {
+	    memmove (ic_info->keys, ic_info->keys + 1,
+		     sizeof (int) * (ic_info->used - 1));
+	    ic_info->used--;
+	  }
+	/* This forces returning 1.  */
+	ic_info->key_unhandled = 1;
+	break;
+      }
+    if (i++ == 100)
+      {
+	mdebug_hook ();
+	reset_ic (ic, Mnil);
+	ic_info->key_unhandled = 1;
+	break;
+      }
+    /* Break the loop if all keys were handled.  */
+  } while (ic_info->key_head < ic_info->used);
+
+  /* If the current map is the root of the initial state, we should
+     produce any preedit text in ic->produced.  */
+  if (ic_info->map == ((MIMState *) MPLIST_VAL (im_info->states))->map
+      && mtext_nchars (ic->preedit) > 0)
+    shift_state (ic, ((MIMState *) MPLIST_VAL (im_info->states))->name);
+
+  if (mtext_nchars (ic->produced) > 0)
+    {
+      MSymbol lang = msymbol_get (ic->im->language, Mlanguage);
+
+      if (lang != Mnil)
+	mtext_put_prop (ic->produced, 0, mtext_nchars (ic->produced),
+			Mlanguage, ic->im->language);
+    }
+
+  return (! ic_info->key_unhandled && mtext_nchars (ic->produced) == 0);
+}
+
+
+/** Return 1 if the last event or key was not handled, otherwise
+    return 0.
+
+    There is no need of looking up because ic->produced should already
+    contain the produced text (if any).
+
+    Ignore KEY.  */
+
+static int
+lookup (MInputContext *ic, MSymbol key, void *arg, MText *mt)
+{
+  mtext_cat (mt, ic->produced);
+  mtext_reset (ic->produced);
+  return (((MInputContextInfo *) ic->info)->key_unhandled ? -1 : 0);
+}
+
+
+/* Input method command handler.  */
+
+/* List of all (global and local) commands. 
+   (LANG:(IM-NAME:(COMMAND ...) ...) ...) ...
+   COMMAND is CMD-NAME:(mtext:DESCRIPTION plist:KEYSEQ ...))
+   Global commands are stored as (t (t COMMAND ...))  */
+
+
+/* Input method variable handler.  */
+
+
+/* Support functions for mdebug_dump_im.  */
+
+static void
+dump_im_map (MPlist *map_list, int indent)
+{
+  char *prefix;
+  MSymbol key = MPLIST_KEY (map_list);
+  MIMMap *map = (MIMMap *) MPLIST_VAL (map_list);
+
+  prefix = (char *) alloca (indent + 1);
+  memset (prefix, 32, indent);
+  prefix[indent] = '\0';
+
+  fprintf (stderr, "(\"%s\" ", msymbol_name (key));
+  if (map->map_actions)
+    mdebug_dump_plist (map->map_actions, indent + 2);
+  if (map->submaps)
+    {
+      MPLIST_DO (map_list, map->submaps)
+	{
+	  fprintf (stderr, "\n%s  ", prefix);
+	  dump_im_map (map_list, indent + 2);
+	}
+    }
+  if (map->branch_actions)
+    {
+      fprintf (stderr, "\n%s  (branch\n%s    ", prefix, prefix);
+      mdebug_dump_plist (map->branch_actions, indent + 4);
+      fprintf (stderr, ")");      
+    }
+  fprintf (stderr, ")");
+}
+
+
+static void
+dump_im_state (MIMState *state, int indent)
+{
+  char *prefix;
+  MPlist *map_list;
+
+  prefix = (char *) alloca (indent + 1);
+  memset (prefix, 32, indent);
+  prefix[indent] = '\0';
+
+  fprintf (stderr, "(%s", msymbol_name (state->name));
+  if (state->map->submaps)
+    {
+      MPLIST_DO (map_list, state->map->submaps)
+	{
+	  fprintf (stderr, "\n%s  ", prefix);
+	  dump_im_map (map_list, indent + 2);
+	}
+    }
+  fprintf (stderr, ")");
+}
+
+
+
+int
+minput__init ()
+{
+  Minput_driver = msymbol ("input-driver");
+
+  Minput_preedit_start = msymbol ("input-preedit-start");
+  Minput_preedit_done = msymbol ("input-preedit-done");
+  Minput_preedit_draw = msymbol ("input-preedit-draw");
+  Minput_status_start = msymbol ("input-status-start");
+  Minput_status_done = msymbol ("input-status-done");
+  Minput_status_draw = msymbol ("input-status-draw");
+  Minput_candidates_start = msymbol ("input-candidates-start");
+  Minput_candidates_done = msymbol ("input-candidates-done");
+  Minput_candidates_draw = msymbol ("input-candidates-draw");
+  Minput_set_spot = msymbol ("input-set-spot");
+  Minput_focus_move = msymbol ("input-focus-move");
+  Minput_focus_in = msymbol ("input-focus-in");
+  Minput_focus_out = msymbol ("input-focus-out");
+  Minput_toggle = msymbol ("input-toggle");
+  Minput_reset = msymbol ("input-reset");
+  Minput_get_surrounding_text = msymbol ("input-get-surrounding-text");
+  Minput_delete_surrounding_text = msymbol ("input-delete-surrounding-text");
+  Mcustomized = msymbol ("customized");
+  Mconfigured = msymbol ("configured");
+  Minherited = msymbol ("inherited");
+
+  minput_default_driver.open_im = open_im;
+  minput_default_driver.close_im = close_im;
+  minput_default_driver.create_ic = create_ic;
+  minput_default_driver.destroy_ic = destroy_ic;
+  minput_default_driver.filter = filter;
+  minput_default_driver.lookup = lookup;
+  minput_default_driver.callback_list = mplist ();
+  mplist_put (minput_default_driver.callback_list, Minput_reset,
+	      (void *) reset_ic);
+  minput_driver = &minput_default_driver;
+
+  fully_initialized = 0;
+  return 0;
+}
+
+void
+minput__fini ()
+{
+  if (fully_initialized)
+    {
+      free_im_list (im_info_list);
+      if (im_custom_list)
+	free_im_list (im_custom_list);
+      if (im_config_list)
+	free_im_list (im_config_list);
+      M17N_OBJECT_UNREF (load_im_info_keys);
+    }
+
+  M17N_OBJECT_UNREF (minput_default_driver.callback_list);
+  M17N_OBJECT_UNREF (minput_driver->callback_list);
+
+}
+
+int
+minput__callback (MInputContext *ic, MSymbol command)
+{
+  MInputCallbackFunc func;
+
+  if (! ic->im->driver.callback_list)
+    return -1;
+  func = (MInputCallbackFunc) mplist_get (ic->im->driver.callback_list,
+					  command);
+  if (! func)
+    return -1;
+  (func) (ic, command);
+  return 0;
+}
+
+MSymbol
+minput__char_to_key (int c)
+{
+  if (c < 0 || c >= 0x100)
+    return Mnil;
+
+  return one_char_symbol[c];
+}
+
+/*** @} */
+#endif /* !FOR_DOXYGEN || DOXYGEN_INTERNAL_MODULE */
+
+
+/* External API */
+
+/*** @addtogroup m17nInputMethod */
+/*** @{ */
+/*=*/
+
+/***en
+    @name Variables: Predefined symbols for callback commands.
+
+    These are the predefined symbols that are used as the @c COMMAND
+    argument of callback functions of an input method driver (see
+    #MInputDriver::callback_list).  
+
+    Most of them do not require extra argument nor return any value;
+    exceptions are these:
+
+    Minput_get_surrounding_text: When a callback function assigned for
+    this command is called, the first element of #MInputContext::plist
+    has key #Minteger and the value specifies which portion of the
+    surrounding text should be retrieved.  If the value is positive,
+    it specifies the number of characters following the current cursor
+    position.  If the value is negative, the absolute value specifies
+    the number of characters preceding the current cursor position.
+
+    If the surrounding text is currently supported, the callback
+    function must set the key of this element to #Mtext and the value
+    to the retrieved M-text.  The length of the M-text may be shorter
+    than the requested number of characters, if the available text is
+    not that long.  The length can be zero in the worst case.  Or, the
+    length may be longer if an application thinks it is more efficient
+    to return that length.
+
+    If the surrounding text is not currently supported, the callback
+    function should return without changing the first element of
+    #MInputContext::plist.
+
+    Minput_delete_surrounding_text: When a callback function assigned
+    for this command is called, the first element of
+    #MInputContext::plist has key #Minteger and the value specifies
+    which portion of the surrounding text should be deleted in the
+    same way as the case of Minput_get_surrounding_text.  The callback
+    function must delete the specified text.  It should not alter
+    #MInputContext::plist.  */ 
+/***ja
+    @name ÊÑ¿ô¡§ ¥³¡¼¥ë¥Ð¥Ã¥¯¥³¥Þ¥ó¥ÉÍÑÄêµÁºÑ¤ß¥·¥ó¥Ü¥ë.
+
+    ÆþÎϥ᥽¥Ã¥É¥É¥é¥¤¥Ð¤Î¥³¡¼¥ë¥Ð¥Ã¥¯´Ø¿ô¤Ë¤ª¤¤¤Æ @c COMMAND 
+    °ú¿ô¤È¤·¤ÆÍѤ¤¤é¤ì¤ëÄêµÁºÑ¤ß¥·¥ó¥Ü¥ë (#MInputDriver::callback_list »²¾È)¡£
+
+    ¤Û¤È¤ó¤É¤ÏÄɲäΰú¿ô¤òɬÍפȤ·¤Ê¤¤¤·ÃͤòÊÖ¤µ¤Ê¤¤¤¬¡¢°Ê²¼¤ÏÎã³°¤Ç¤¢¤ë¡£
+
+    Minput_get_surrounding_text: ¤³¤Î¥³¥Þ¥ó¥É¤Ë³ä¤êÅö¤Æ¤é¤ì¤¿¥³¡¼¥ë¥Ð¥Ã
+    ¥¯´Ø¿ô¤¬¸Æ¤Ð¤ì¤¿ºÝ¤Ë¤Ï¡¢ #MInputContext::plist ¤ÎÂè°ìÍ×ÁǤϥ­¡¼¤È¤·
+    ¤Æ#Minteger ¤ò¤È¤ê¡¢¤½¤ÎÃͤϥµ¥é¥¦¥ó¥Ç¥£¥ó¥°¥Æ¥­¥¹¥È¤Î¤¦¤Á¤É¤ÎÉôʬ
+    ¤ò¼è¤Ã¤ÆÍè¤ë¤«¤ò»ØÄꤹ¤ë¡£Ãͤ¬Àµ¤Ç¤¢¤ì¤Ð¡¢¸½ºß¤Î¥«¡¼¥½¥ë°ÌÃ֤˳¤¯
+    ÃͤθĿôʬ¤Îʸ»ú¤ò¼è¤ë¡£Éé¤Ç¤¢¤ì¤Ð¡¢¥«¡¼¥½¥ë°ÌÃÖ¤ËÀè¹Ô¤¹¤ëÃͤÎÀäÂÐ
+    ÃÍʬ¤Îʸ»ú¤ò¼è¤ë¡£
+
+    ¥µ¥é¥¦¥ó¥Ç¥£¥ó¥°¥Æ¥­¥¹¥È¤¬¥µ¥Ý¡¼¥È¤µ¤ì¤Æ¤¤¤ì¤Ð¡¢¥³¡¼¥ë¥Ð¥Ã¥¯´Ø¿ô¤Ï
+    ¤³¤ÎÍ×ÁǤΥ­¡¼¤ò #Mtext ¤Ë¡¢Ãͤò¼è¤ê¹þ¤ó¤ÀM-text ¤ËÀßÄꤷ¤Ê¤¯¤Æ¤Ï¤Ê
+    ¤é¤Ê¤¤¡£¤â¤·¥Æ¥­¥¹¥È¤ÎŤµ¤¬½¼Ê¬¤Ç¤Ê¤±¤ì¤Ð¡¢¤³¤Î M-text ¤ÎŤµ¤ÏÍ×
+    µá¤µ¤ì¤Æ¤¤¤ëʸ»ú¿ô¤è¤êû¤¯¤ÆÎɤ¤¡£ºÇ°­¤Î¾ì¹ç 0 ¤Ç¤â¤è¤¤¤·¡¢¥¢¥×¥ê¥±¡¼
+    ¥·¥ç¥ó¦¤ÇɬÍפǸúΨŪ¤À¤È»×¤¨¤ÐŤ¯¤Æ¤âÎɤ¤¡£
+
+    ¥µ¥é¥¦¥ó¥Ç¥£¥ó¥°¥Æ¥­¥¹¥È¤¬¥µ¥Ý¡¼¥È¤µ¤ì¤Æ¤¤¤Ê¤±¤ì¤Ð¡¢¥³¡¼¥ë¥Ð¥Ã¥¯´Ø
+    ¿ô¤Ï #MInputContext::plist ¤ÎÂè°ìÍ×ÁǤòÊѲ½¤µ¤»¤ë¤³¤È¤Ê¤¯ÊÖ¤µ¤Ê¤¯¤Æ
+    ¤Ï¤Ê¤é¤Ê¤¤¡£
+
+    Minput_delete_surrounding_text: ¤³¤Î¥³¥Þ¥ó¥É¤Ë³ä¤êÅö¤Æ¤é¤ì¤¿¥³¡¼¥ë
+    ¥Ð¥Ã¥¯´Ø¿ô¤¬¸Æ¤Ð¤ì¤¿ºÝ¤Ë¤Ï¡¢#MInputContext::plist ¤ÎÂè°ìÍ×ÁǤϡ¢¥­¡¼
+    ¤È¤·¤Æ#Minteger ¤ò¤È¤ê¡¢ÃͤϺï½ü¤¹¤ë¤Ù¤­¥µ¥é¥¦¥ó¥Ç¥£¥ó¥°¥Æ¥­¥¹¥È¤ò
+    Minput_get_surrounding_text ¤ÈƱÍͤΤä¤êÊý¤Ç»ØÄꤹ¤ë¡£¥³¡¼¥ë¥Ð¥Ã¥¯
+    ´Ø¿ô¤Ï»ØÄꤵ¤ì¤¿¥Æ¥­¥¹¥È¤òºï½ü¤·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£¤Þ¤¿
+    #MInputContext::plist ¤òÊѤ¨¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£  */ 
+/*** @{ */ 
+/*=*/
+
+MSymbol Minput_preedit_start;
+MSymbol Minput_preedit_done;
+MSymbol Minput_preedit_draw;
+MSymbol Minput_status_start;
+MSymbol Minput_status_done;
+MSymbol Minput_status_draw;
+MSymbol Minput_candidates_start;
+MSymbol Minput_candidates_done;
+MSymbol Minput_candidates_draw;
+MSymbol Minput_set_spot;
+MSymbol Minput_toggle;
+MSymbol Minput_reset;
+MSymbol Minput_get_surrounding_text;
+MSymbol Minput_delete_surrounding_text;
+/*** @} */
+
+/*=*/
+
+/***en
+    @name Variables: Predefined symbols for special input events.
 
-	  if (pos < 0)
-	    pos = 0;
-	  else if (pos > len)
-	    pos = len;
-	  if (pos != ic->cursor_pos)
-	    {
-	      ic->cursor_pos = pos;
-	      ic->preedit_changed = 1;
-	    }
-	}
-      else if (name == Mmark)
-	{
-	  int code = marker_code (MPLIST_SYMBOL (args));
+    These are the predefined symbols that are used as the @c KEY
+    argument of minput_filter ().  */ 
+/***ja
+    @name ÊÑ¿ô: ÆÃÊ̤ÊÆþÎÏ¥¤¥Ù¥ó¥ÈÍÑÄêµÁºÑ¤ß¥·¥ó¥Ü¥ë.
 
-	  if (code < 0)
-	    mplist_put (ic_info->markers, MPLIST_SYMBOL (args),
-			(void *) ic->cursor_pos);
-	}
-      else if (name == Mpushback)
-	{
-	  if (MPLIST_INTEGER_P (args))
-	    {
-	      int num = MPLIST_INTEGER (args);
+    minput_filter () ¤Î @c KEY °ú¿ô¤È¤·¤ÆÍѤ¤¤é¤ì¤ëÄêµÁºÑ¤ß¥·¥ó¥Ü¥ë¡£  */ 
 
-	      if (num > 0)
-		ic_info->key_head -= num;
-	      else
-		ic_info->key_head = num;
-	      if (ic_info->key_head > ic_info->used)
-		ic_info->key_head = ic_info->used;
-	    }
-	  else if (MPLIST_MTEXT_P (args))
-	    {
-	      MText *mt = MPLIST_MTEXT (args);
-	      int i, len = mtext_nchars (mt);
-	      MSymbol key;
+/*** @{ */ 
+/*=*/
 
-	      ic_info->key_head--;
-	      for (i = 0; i < len; i++)
-		{
-		  key = one_char_symbol[MTEXT_DATA (mt)[i]];
-		  if (ic_info->key_head + i < ic_info->used)
-		    ic_info->keys[ic_info->key_head + i] = key;
-		  else
-		    MLIST_APPEND1 (ic_info, keys, key, MERROR_IM);
-		}
-	    }
-	  else
-	    {
-	      MPlist *plist = MPLIST_PLIST (args), *pl;
-	      int i = 0;
-	      MSymbol key;
+MSymbol Minput_focus_out;
+MSymbol Minput_focus_in;
+MSymbol Minput_focus_move;
 
-	      ic_info->key_head--;
+/*** @} */
 
-	      MPLIST_DO (pl, plist)
-		{
-		  key = MPLIST_SYMBOL (pl);
-		  if (ic_info->key_head < ic_info->used)
-		    ic_info->keys[ic_info->key_head + i] = key;
-		  else
-		    MLIST_APPEND1 (ic_info, keys, key, MERROR_IM);
-		  i++;
-		}
-	    }
-	}
-      else if (name == Mcall)
-	{
-	  MInputMethodInfo *im_info = (MInputMethodInfo *) ic->im->info;
-	  MIMExternalFunc func = NULL;
-	  MSymbol module, func_name;
-	  MPlist *func_args, *val;
-	  int ret = 0;
+/*=*/
+/***en
+    @name Variables: Predefined symbols used in input method information.
 
-	  module = MPLIST_SYMBOL (args);
-	  args = MPLIST_NEXT (args);
-	  func_name = MPLIST_SYMBOL (args);
+    These are the predefined symbols describing status of input method
+    command and variable, and are used in a return value of
+    minput_get_command () and minput_get_variable ().  */
+/***ja
+    @name ÊÑ¿ô: ÆþÎϥ᥽¥Ã¥É¾ðÊóÍÑÄêµÁºÑ¤ß¥·¥ó¥Ü¥ë.
 
-	  if (im_info->externals)
-	    {
-	      MIMExternalModule *external
-		= (MIMExternalModule *) mplist_get (im_info->externals,
-						    module);
-	      if (external)
-		func = (MIMExternalFunc) mplist_get (external->func_list,
-						     func_name);
-	    }
-	  if (! func)
-	    continue;
-	  func_args = mplist ();
-	  mplist_add (func_args, Mt, ic);
-	  MPLIST_DO (args, MPLIST_NEXT (args))
-	    {
-	      int code;
+    ÆþÎϥ᥽¥Ã¥É¤Î¥³¥Þ¥ó¥É¤äÊÑ¿ô¤Î¾õÂÖ¤òɽ¤·¡¢minput_get_command () ¤È
+    minput_get_variable () ¤ÎÌá¤êÃͤȤ·¤ÆÍѤ¤¤é¤ì¤ëÄêµÁºÑ¤ß¥·¥ó¥Ü¥ë¡£  */
+/*** @{ */ 
+/*=*/
+MSymbol Minherited;
+MSymbol Mcustomized;
+MSymbol Mconfigured;
+/*** @} */ 
 
-	      if (MPLIST_KEY (args) == Msymbol
-		  && MPLIST_KEY (args) != Mnil
-		  && (code = marker_code (MPLIST_SYMBOL (args))) >= 0)
-		{
-		  code = new_index (ic, ic->cursor_pos, 
-				    mtext_nchars (ic->preedit),
-				    MPLIST_SYMBOL (args), ic->preedit);
-		  mplist_add (func_args, Minteger, (void *) code);
-		}
-	      else
-		mplist_add (func_args, MPLIST_KEY (args), MPLIST_VAL (args));
-	    }
-	  val = (func) (func_args);
-	  M17N_OBJECT_UNREF (func_args);
-	  if (val && ! MPLIST_TAIL_P (val))
-	    ret = take_action_list (ic, val);
-	  M17N_OBJECT_UNREF (val);
-	  if (ret < 0)
-	    return ret;
-	}
-      else if (name == Mshift)
-	{
-	  shift_state (ic, MPLIST_SYMBOL (args));
-	}
-      else if (name == Mundo)
-	{
-	  int intarg = (MPLIST_TAIL_P (args)
-			? ic_info->used - 2
-			: integer_value (ic, args, NULL, 0));
+/*=*/
 
-	  mtext_reset (ic->preedit);
-	  mtext_reset (ic_info->preedit_saved);
-	  ic->cursor_pos = ic_info->state_pos = 0;
-	  ic_info->state_key_head = ic_info->key_head = 0;
+/***en
+    @brief The default driver for internal input methods.
 
-	  if (intarg < 0)
-	    ic_info->used += intarg;
-	  else
-	    ic_info->used = intarg;
-	  shift_state (ic, Mnil);
-	  break;
-	}
-      else if (name == Mset || name == Madd || name == Msub
-	       || name == Mmul || name == Mdiv)
-	{
-	  MSymbol sym = MPLIST_SYMBOL (args);
-	  int val1, val2;
-	  MPlist *value;
-	  char *op;
+    The variable #minput_default_driver is the default driver for
+    internal input methods.
 
-	  val1 = integer_value (ic, args, &value, 0);
-	  args = MPLIST_NEXT (args);
-	  val2 = resolve_expression (ic, args);
-	  if (name == Mset)
-	    val1 = val2, op = "=";
-	  else if (name == Madd)
-	    val1 += val2, op = "+=";
-	  else if (name == Msub)
-	    val1 -= val2, op = "-=";
-	  else if (name == Mmul)
-	    val1 *= val2, op = "*=";
-	  else
-	    val1 /= val2, op = "/=";
-	  MDEBUG_PRINT4 ("(%s %s 0x%X(%d))",
-			 MSYMBOL_NAME (sym), op, val1, val1);
-	  if (value)
-	    mplist_set (value, Minteger, (void *) val1);
-	}
-      else if (name == Mequal || name == Mless || name == Mgreater
-	       || name == Mless_equal || name == Mgreater_equal)
-	{
-	  int val1, val2;
-	  MPlist *actions1, *actions2;
-	  int ret = 0;
+    The member MInputDriver::open_im () searches the m17n database for
+    an input method that matches the tag \< #Minput_method, $LANGUAGE,
+    $NAME\> and loads it.
 
-	  val1 = resolve_expression (ic, args);
-	  args = MPLIST_NEXT (args);
-	  val2 = resolve_expression (ic, args);
-	  args = MPLIST_NEXT (args);
-	  actions1 = MPLIST_PLIST (args);
-	  args = MPLIST_NEXT (args);
-	  if (MPLIST_TAIL_P (args))
-	    actions2 = NULL;
-	  else
-	    actions2 = MPLIST_PLIST (args);
-	  MDEBUG_PRINT3 ("(%d %s %d)? ", val1, MSYMBOL_NAME (name), val2);
-	  if (name == Mequal ? val1 == val2
-	      : name == Mless ? val1 < val2
-	      : name == Mgreater ? val1 > val2
-	      : name == Mless_equal ? val1 <= val2
-	      : val1 >= val2)
-	    {
-	      MDEBUG_PRINT ("ok");
-	      ret = take_action_list (ic, actions1);
-	    }
-	  else
-	    {
-	      MDEBUG_PRINT ("no");
-	      if (actions2)
-		ret = take_action_list (ic, actions2);
-	    }
-	  if (ret < 0)
-	    return ret;
-	}
-      else if (name == Mcond)
-	{
-	  int idx = 0;
+    The member MInputDriver::callback_list () is @c NULL.  Thus, it is
+    programmers responsibility to set it to a plist of proper callback
+    functions.  Otherwise, no feedback information (e.g. preedit text)
+    can be shown to users.
 
-	  MPLIST_DO (args, args)
-	    {
-	      MPlist *cond;
+    The macro M17N_INIT () sets the variable #minput_driver to the
+    pointer to this driver so that all internal input methods use it.
 
-	      idx++;
-	      if (! MPLIST_PLIST (args))
-		continue;
-	      cond = MPLIST_PLIST (args);
-	      if (resolve_expression (ic, cond) != 0)
-		{
-		  MDEBUG_PRINT1 ("(%dth)", idx);
-		  if (take_action_list (ic, MPLIST_NEXT (cond)) < 0)
-		    return -1;;
-		  break;
-		}
-	    }
-	}
-      else if (name == Mcommit)
-	{
-	  preedit_commit (ic);
-	}
-      else if (name == Munhandle)
-	{
-	  preedit_commit (ic);
-	  return -1;
-	}
-      else
-	{
-	  MInputMethodInfo *im_info = (MInputMethodInfo *) ic->im->info;
-	  MPlist *actions;
+    Therefore, unless @c minput_driver is set differently, the driver
+    dependent arguments $ARG of the functions whose name begins with
+    "minput_" are all ignored.  */
+/***ja
+    @brief ÆâÉôÆþÎϥ᥽¥Ã¥ÉÍѥǥե©¥ë¥È¥É¥é¥¤¥Ð.
+
+    ÊÑ¿ô #minput_default_driver ¤ÏÆâÉôÆþÎϥ᥽¥Ã¥ÉÍѤΥǥե©¥ë¥È¤Î¥É¥é¥¤¥Ð¤òɽ¤¹¡£
+
+    ¥á¥ó¥Ð MInputDriver::open_im () ¤Ï m17n ¥Ç¡¼¥¿¥Ù¡¼¥¹Ã椫¤é¥¿¥° 
+    \< #Minput_method, $LANGUAGE, $NAME\> 
+    ¤Ë¹çÃפ¹¤ëÆþÎϥ᥽¥Ã¥É¤òõ¤·¡¢¤½¤ì¤ò¥í¡¼¥É¤¹¤ë¡£
 
-	  if (im_info->macros
-	      && (actions = mplist_get (im_info->macros, name)))
-	    {
-	      if (take_action_list (ic, actions) < 0)
-		return -1;
-	    };
-	}
-    }
+    ¥á¥ó¥Ð MInputDriver::callback_list () ¤Ï @c NULL ¤Ç¤¢¤ê¡¢
+    ¤·¤¿¤¬¤Ã¤Æ¡¢¥×¥í¥°¥é¥Þ¦¤ÇÀÕǤ¤ò»ý¤Ã¤Æ ŬÀڤʥ³¡¼¥ë¥Ð¥Ã¥¯´Ø¿ô¤Î plist
+    ¤ËÀßÄꤷ¤Ê¤¯¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£¤µ¤â¤Ê¤¤¤È¡¢preedit 
+    ¥Æ¥­¥¹¥È¤Ê¤É¤Î¥Õ¥£¡¼¥É¥Ð¥Ã¥¯¾ðÊ󤬥桼¥¶¤Ëɽ¼¨¤µ¤ì¤Ê¤¤¡£
 
-  prop = NULL;
-  if (ic->candidate_list)
-    {
-      M17N_OBJECT_UNREF (ic->candidate_list);
-      ic->candidate_list = NULL;
-    }
-  if (ic->cursor_pos > 0
-      && (prop = mtext_get_property (ic->preedit, ic->cursor_pos - 1,
-				     Mcandidate_list)))
-    {
-      ic->candidate_list = mtext_property_value (prop);
-      M17N_OBJECT_REF (ic->candidate_list);
-      ic->candidate_index
-	= (int) mtext_get_prop (ic->preedit, ic->cursor_pos - 1,
-				Mcandidate_index);
-      ic->candidate_from = mtext_property_start (prop);
-      ic->candidate_to = mtext_property_end (prop);
-    }
+    ¥Þ¥¯¥í M17N_INIT () ¤ÏÊÑ¿ô #minput_driver 
+    ¤ò¤³¤Î¥É¥é¥¤¥Ð¤Ø¤Î¥Ý¥¤¥ó¥¿¤ËÀßÄꤷ¡¢Á´¤Æ¤ÎÆâÉôÆþÎϥ᥽¥Ã¥É¤¬¤³¤Î¥É¥é¥¤¥Ð¤ò»È¤¦¤è¤¦¤Ë¤¹¤ë¡£
 
-  if (candidate_list != ic->candidate_list)
-    ic->candidates_changed |= MINPUT_CANDIDATES_LIST_CHANGED;
-  if (candidate_index != ic->candidate_index)
-    ic->candidates_changed |= MINPUT_CANDIDATES_INDEX_CHANGED;
-  if (candidate_show != ic->candidate_show)
-    ic->candidates_changed |= MINPUT_CANDIDATES_SHOW_CHANGED;    
-  return 0;
-}
+    ¤·¤¿¤¬¤Ã¤Æ¡¢@c minput_driver ¤¬¥Ç¥Õ¥©¥ë¥ÈÃͤΤޤޤǤ¢¤ì¤Ð¡¢minput_ 
+    ¤Ç»Ï¤Þ¤ë´Ø¿ô¤Î¥É¥é¥¤¥Ð¤Ë°Í¸¤¹¤ë°ú¿ô $ARG ¤Ï¤¹¤Ù¤Æ̵»ë¤µ¤ì¤ë¡£  */
 
+MInputDriver minput_default_driver;
+/*=*/
 
-/* Handle the input key KEY in the current state and map specified in
-   the input context IC.  If KEY is handled correctly, return 0.
-   Otherwise, return -1.  */
+/***en
+    @brief The driver for internal input methods.
 
-static int
-handle_key (MInputContext *ic)
-{
-  MInputMethodInfo *im_info = (MInputMethodInfo *) ic->im->info;
-  MInputContextInfo *ic_info = (MInputContextInfo *) ic->info;
-  MIMMap *map = ic_info->map;
-  MIMMap *submap = NULL;
-  MSymbol key = ic_info->keys[ic_info->key_head];
-  MSymbol alias = Mnil;
-  int i;
+    The variable #minput_driver is a pointer to the input method
+    driver that is used by internal input methods.  The macro
+    M17N_INIT () initializes it to a pointer to #minput_default_driver
+    if <m17n<EM></EM>.h> is included.  */ 
+/***ja
+    @brief ÆâÉôÆþÎϥ᥽¥Ã¥ÉÍѥɥ饤¥Ð.
 
-  MDEBUG_PRINT2 ("  [IM] handle `%s' in state %s", 
-		 MSYMBOL_NAME (key), MSYMBOL_NAME (ic_info->state->name));
+    ÊÑ¿ô #minput_driver ¤ÏÆâÉôÆþÎϥ᥽¥Ã¥É¤Ë¤è¤Ã¤Æ»ÈÍѤµ¤ì¤Æ¤¤¤ëÆþÎÏ¥á
+    ¥½¥Ã¥É¥É¥é¥¤¥Ð¤Ø¤Î¥Ý¥¤¥ó¥¿¤Ç¤¢¤ë¡£¥Þ¥¯¥í M17N_INIT () ¤Ï¤³¤Î¥Ý¥¤¥ó
+    ¥¿¤ò#minput_default_driver (<m17n<EM></EM>.h> ¤¬ include ¤µ¤ì¤Æ¤¤¤ë
+    »þ) ¤Ë½é´ü²½¤¹¤ë¡£  */ 
 
-  if (map->submaps)
-    {
-      submap = mplist_get (map->submaps, key);
-      if (! submap && (alias = msymbol_get (key, M_key_alias)) != Mnil)
-	submap = mplist_get (map->submaps, alias);
-    }
+MInputDriver *minput_driver;
 
-  if (submap)
-    {
-      if (alias == Mnil)
-	MDEBUG_PRINT (" submap-found");
-      else
-	MDEBUG_PRINT1 (" submap-found (by alias `%s')", MSYMBOL_NAME (alias));
-      mtext_cpy (ic->preedit, ic_info->preedit_saved);
-      ic->preedit_changed = 1;
-      ic->cursor_pos = ic_info->state_pos;
-      ic_info->key_head++;
-      ic_info->map = map = submap;
-      if (map->map_actions)
-	{
-	  MDEBUG_PRINT (" map-actions:");
-	  if (take_action_list (ic, map->map_actions) < 0)
-	    {
-	      MDEBUG_PRINT ("\n");
-	      return -1;
-	    }
-	}
-      else if (map->submaps)
-	{
-	  for (i = ic_info->state_key_head; i < ic_info->key_head; i++)
-	    {
-	      MSymbol key = ic_info->keys[i];
-	      char *name = msymbol_name (key);
+MSymbol Minput_driver;
 
-	      if (! name[0] || ! name[1])
-		mtext_ins_char (ic->preedit, ic->cursor_pos++, name[0], 1);
-	    }
-	}
+/*=*/
 
-      /* If this is the terminal map or we have shifted to another
-	 state, perform branch actions (if any).  */
-      if (! map->submaps || map != ic_info->map)
-	{
-	  if (map->branch_actions)
-	    {
-	      MDEBUG_PRINT (" branch-actions:");
-	      if (take_action_list (ic, map->branch_actions) < 0)
-		{
-		  MDEBUG_PRINT ("\n");
-		  return -1;
-		}
-	    }
-	  /* If MAP is still not the root map, shift to the current
-	     state.  */
-	  if (ic_info->map != ic_info->state->map)
-	    shift_state (ic, ic_info->state->name);
-	}
-    }
-  else
-    {
-      /* MAP can not handle KEY.  */
+/***en
+    @brief Open an input method.
 
-      /* If MAP is the root map of the initial state, it means that
-	 the current input method can not handle KEY.  */
-      if (map == ((MIMState *) MPLIST_VAL (im_info->states))->map)
-	{
-	  MDEBUG_PRINT (" unhandled\n");
-	  return -1;
-	}
+    The minput_open_im () function opens an input method whose
+    language and name match $LANGUAGE and $NAME, and returns a pointer
+    to the input method object newly allocated.
 
-      if (map != ic_info->state->map)
-	{
-	  /* If MAP is not the root map... */
-	  /* If MAP has branch actions, perform them.  */
-	  if (map->branch_actions)
-	    {
-	      MDEBUG_PRINT (" branch-actions:");
-	      if (take_action_list (ic, map->branch_actions) < 0)
-		{
-		  MDEBUG_PRINT ("\n");
-		  return -1;
-		}
-	    }
-	  /* If MAP is still not the root map, shift to the current
-	     state. */
-	  if (ic_info->map != ic_info->state->map)
-	    {
-	      shift_state (ic, ic_info->state->name);
-	      /* If MAP has branch_actions, perform them.  */
-	      if (ic_info->map->branch_actions)
-		{
-		  MDEBUG_PRINT (" brank-actions:");
-		  if (take_action_list (ic, ic_info->map->branch_actions) < 0)
-		    return -1;
-		}
-	    }
-	}
-      else
-	{
-	  /* MAP is the root map, perform branch actions (if any) or
-	     shift to the initial state.  */
-	  if (map->branch_actions)
-	    {
-	      MDEBUG_PRINT (" branch-actions:");
-	      if (take_action_list (ic, map->branch_actions) < 0)
-		{
-		  MDEBUG_PRINT ("\n");
-		  return -1;
-		}
-	    }
-	  else
-	    shift_state (ic, Mnil);
-	}
-    }
-  MDEBUG_PRINT ("\n");
-  return 0;
-}
+    This function at first decides a driver for the input method as
+    described below.
 
-static void
-reset_ic (MInputContext *ic, MSymbol ignore)
-{
-  MInputMethodInfo *im_info = (MInputMethodInfo *) ic->im->info;
-  MInputContextInfo *ic_info = (MInputContextInfo *) ic->info;
-  MText *status;
+    If $LANGUAGE is not #Mnil, the driver pointed by the variable
+    #minput_driver is used.
 
-  MDEBUG_PRINT ("\n  [IM] reset\n");
+    If $LANGUAGE is #Mnil and $NAME has the property #Minput_driver, the
+    driver pointed to by the property value is used to open the input
+    method.  If $NAME has no such a property, @c NULL is returned.
 
-  ic_info->state = (MIMState *) MPLIST_VAL (im_info->states);
-  ic_info->prev_state = NULL;
-  ic_info->map = ic_info->state->map;
-  ic_info->state_key_head = ic_info->key_head;
-  MLIST_RESET (ic_info);
-  ic_info->key_unhandled = 0;
+    Then, the member MInputDriver::open_im () of the driver is
+    called.  
 
-  if (mtext_nchars (ic->produced) > 0)
-    mtext_reset (ic->produced);
-  if (mtext_nchars (ic->preedit) > 0)
-    {
-      MPlist *plist;
+    $ARG is set in the member @c arg of the structure MInputMethod so
+    that the driver can refer to it.  */
+/***ja
+    @brief ÆþÎϥ᥽¥Ã¥É¤ò¥ª¡¼¥×¥ó¤¹¤ë.
 
-      mtext_reset (ic->preedit);
-      MPLIST_DO (plist, ic_info->markers)
-	MPLIST_VAL (plist) = 0;
-      ic->preedit_changed = 1;
-    }
-  if (ic->candidate_show)
-    {
-      ic->candidate_show = 0;
-      ic->candidates_changed = MINPUT_CANDIDATES_SHOW_CHANGED;
-      if (ic->candidate_list)
-	{
-	  M17N_OBJECT_UNREF (ic->candidate_list);
-	  ic->candidate_list = NULL;
-	  ic->candidates_changed |= MINPUT_CANDIDATES_LIST_CHANGED;
-	}
-    }
-  mtext_reset (ic_info->preedit_saved);
-  ic_info->state_pos = ic->cursor_pos = 0;
+    ´Ø¿ô minput_open_im () ¤Ï¸À¸ì $LANGUAGE ¤È̾Á° $NAME 
+    ¤Ë¹çÃפ¹¤ëÆþÎϥ᥽¥Ã¥É¤ò¥ª¡¼¥×¥ó¤·¡¢¿·¤¿¤Ë³ä¤êÅö¤Æ¤é¤ì¤¿ÆþÎϥ᥽¥Ã¥É¥ª¥Ö¥¸¥§¥¯¥È¤Ø¤Î¥Ý¥¤¥ó¥¿¤òÊÖ¤¹¡£
+    
+    ¤³¤Î´Ø¿ô¤Ï¡¢¤Þ¤ºÆþÎϥ᥽¥Ã¥ÉÍѤΥɥ饤¥Ð¤ò°Ê²¼¤Î¤è¤¦¤Ë¤·¤Æ·èÄꤹ¤ë¡£
 
-  status = ic_info->state->title ? ic_info->state->title : im_info->title;
-  if (ic->status != status)
-    {
-      ic->status = status;
-      ic->status_changed = 1;
-    }
-}
+    $LANGUAGE ¤¬ #Mnil ¤Ç¤Ê¤±¤ì¤Ð¡¢ÊÑ¿ô #minput_driver 
+    ¤Ç»Ø¤µ¤ì¤Æ¤¤¤ë¥É¥é¥¤¥Ð¤òÍѤ¤¤ë¡£
 
-static int
-open_im (MInputMethod *im)
-{
-  MInputMethodInfo *im_info = get_im_info (im->language, im->name, Mnil);
+    $LANGUAGE ¤¬ #Mnil ¤Ç¤¢¤ê¡¢$NAME ¤¬ #Minput_driver
+    ¥×¥í¥Ñ¥Æ¥£¤ò»ý¤Ä¾ì¹ç¤Ë¤Ï¡¢¤½¤Î¥×¥í¥Ñ¥Æ¥£¤ÎÃͤǻؤµ¤ì¤Æ¤¤¤ëÆþÎϥɥ饤¥Ð¤òÍѤ¤¤ÆÆþÎϥ᥽¥Ã¥É¤ò¥ª¡¼¥×¥ó¤¹¤ë¡£
+    $NAME ¤Ë¤½¤Î¤è¤¦¤Ê¥×¥í¥Ñ¥Æ¥£¤¬Ìµ¤«¤Ã¤¿¾ì¹ç¤Ï @c NULL ¤òÊÖ¤¹¡£
 
-  if (! im_info)
-    MERROR (MERROR_IM, -1);
-  im->info = im_info;
-  im_info->im = im;
-  return 0;
-}
+    ¼¡¤¤¤Ç¡¢¥É¥é¥¤¥Ð¤Î¥á¥ó¥Ð MInputDriver::open_im () ¤¬¸Æ¤Ð¤ì¤ë¡£
 
-static void
-close_im (MInputMethod *im)
-{
-  im->info = NULL;
-}
+    $ARG ¤Ï¹½Â¤ÂÎ MInputMethod ¤Î¥á¥ó¥Ð @c arg ¤ËÀßÄꤵ¤ì¡¢¥É¥é¥¤¥Ð¤«¤é»²¾È¤Ç¤­¤ë¡£
 
-static int
-create_ic (MInputContext *ic)
+    @latexonly \IPAlabel{minput_open} @endlatexonly
+
+*/
+
+MInputMethod *
+minput_open_im (MSymbol language, MSymbol name, void *arg)
 {
-  MInputMethod *im = ic->im;
-  MInputMethodInfo *im_info = (MInputMethodInfo *) im->info;
-  MInputContextInfo *ic_info;
-  MPlist *plist;
+  MInputMethod *im;
+  MInputDriver *driver;
+
+  MINPUT__INIT ();
 
-  if (ic->info)
-    ic_info = (MInputContextInfo *) ic->info;
+  MDEBUG_PRINT2 ("  [IM] opening (%s %s) ... ",
+		 msymbol_name (language), msymbol_name (name));
+  if (language)
+    driver = minput_driver;
   else
     {
-      MSTRUCT_CALLOC (ic_info, MERROR_IM);
-      ic->info = ic_info;
+      driver = (MInputDriver *) msymbol_get (name, Minput_driver);
+      if (! driver)
+	MERROR (MERROR_IM, NULL);
     }
-  MLIST_INIT1 (ic_info, keys, 8);
-  ic_info->markers = mplist ();
-  ic_info->vars = mplist ();
-  plist = get_nested_list (im->language, im->name, Mnil, M_variable);
-  MPLIST_DO (plist, plist)
-    {
-      MSymbol var = MPLIST_SYMBOL (plist);
-      MPlist *pl;
 
-      plist = MPLIST_NEXT (plist);
-      pl = MPLIST_PLIST (plist);
-      pl = MPLIST_NEXT (pl);	/* Skip description.  */
-      mplist_push (ic_info->vars, MPLIST_KEY (pl), MPLIST_VAL (pl));
-      mplist_push (ic_info->vars, Msymbol, var);
+  MSTRUCT_CALLOC (im, MERROR_IM);
+  im->language = language;
+  im->name = name;
+  im->arg = arg;
+  im->driver = *driver;
+  if ((*im->driver.open_im) (im) < 0)
+    {
+      MDEBUG_PRINT (" failed\n");
+      free (im);
+      return NULL;
     }
+  MDEBUG_PRINT (" ok\n");
+  return im;
+}
 
-  ic_info->preedit_saved = mtext ();
-  if (im_info->externals)
-    {
-      MPlist *func_args = mplist (), *plist;
+/*=*/
 
-      mplist_add (func_args, Mt, ic);
-      MPLIST_DO (plist, im_info->externals)
-	{
-	  MIMExternalModule *external = MPLIST_VAL (plist);
-	  MIMExternalFunc func
-	    = (MIMExternalFunc) mplist_get (external->func_list, Minit);
+/***en
+    @brief Close an input method.
 
-	  if (func)
-	    (func) (func_args);
-	}
-      M17N_OBJECT_UNREF (func_args);
-    }
-  reset_ic (ic, Mnil);
-  return 0;
-}
+    The minput_close_im () function closes the input method $IM, which
+    must have been created by minput_open_im ().  */
 
-static void
-destroy_ic (MInputContext *ic)
+/***ja
+    @brief ÆþÎϥ᥽¥Ã¥É¤ò¥¯¥í¡¼¥º¤¹¤ë.
+
+    ´Ø¿ô minput_close_im () ¤Ï¡¢ÆþÎϥ᥽¥Ã¥É $IM ¤ò¥¯¥í¡¼¥º¤¹¤ë¡£
+    ¤³¤ÎÆþÎϥ᥽¥Ã¥É $IM ¤Ï minput_open_im () ¤Ë¤è¤Ã¤Æºî¤é¤ì¤¿¤â¤Î¤Ç¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£  */
+
+void
+minput_close_im (MInputMethod *im)
 {
-  MInputMethodInfo *im_info = (MInputMethodInfo *) ic->im->info;
-  MInputContextInfo *ic_info = (MInputContextInfo *) ic->info;
+  MDEBUG_PRINT2 ("  [IM] closing (%s %s) ... ",
+		 msymbol_name (im->name), msymbol_name (im->language));
+  (*im->driver.close_im) (im);
+  free (im);
+  MDEBUG_PRINT (" done\n");
+}
 
-  if (im_info->externals)
-    {
-      MPlist *func_args = mplist (), *plist;
+/*=*/
 
-      mplist_add (func_args, Mt, ic);
-      MPLIST_DO (plist, im_info->externals)
-	{
-	  MIMExternalModule *external = MPLIST_VAL (plist);
-	  MIMExternalFunc func
-	    = (MIMExternalFunc) mplist_get (external->func_list, Mfini);
+/***en
+    @brief Create an input context.
 
-	  if (func)
-	    (func) (func_args);
-	}
-      M17N_OBJECT_UNREF (func_args);
-    }
-  MLIST_FREE1 (ic_info, keys);
-  M17N_OBJECT_UNREF (ic_info->preedit_saved);
-  M17N_OBJECT_UNREF (ic_info->markers);
-  M17N_OBJECT_UNREF (ic_info->vars);
-  M17N_OBJECT_UNREF (ic_info->preceding_text);
-  M17N_OBJECT_UNREF (ic_info->following_text);
-  free (ic->info);
-}
+    The minput_create_ic () function creates an input context object
+    associated with input method $IM, and calls callback functions
+    corresponding to #Minput_preedit_start, #Minput_status_start, and
+    #Minput_status_draw in this order.
 
+    @return
+    If an input context is successfully created, minput_create_ic ()
+    returns a pointer to it.  Otherwise it returns @c NULL.  */
 
-/** Handle the input key KEY in the current state and map of IC->info.
-    If KEY is handled but no text is produced, return 0, otherwise
-    return 1.
+/***ja
+    @brief ÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È¤òÀ¸À®¤¹¤ë.
 
-    Ignore ARG.  */
+    ´Ø¿ô minput_create_ic () ¤ÏÆþÎϥ᥽¥Ã¥É $IM
+    ¤ËÂбþ¤¹¤ëÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È¥ª¥Ö¥¸¥§¥¯¥È¤òÀ¸À®¤·¡¢
+    #Minput_preedit_start, #Minput_status_start, #Minput_status_draw
+    ¤ËÂбþ¤¹¤ë¥³¡¼¥ë¥Ð¥Ã¥¯´Ø¿ô¤ò¤³¤Î½ç¤Ë¸Æ¤Ö¡£
 
-static int
-filter (MInputContext *ic, MSymbol key, void *arg)
+    @return
+    ÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È¤¬À¸À®¤µ¤ì¤¿¾ì¹ç¡¢minput_create_ic () 
+    ¤Ï¤½¤ÎÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È¤Ø¤Î¥Ý¥¤¥ó¥¿¤òÊÖ¤¹¡£¼ºÇÔ¤·¤¿¾ì¹ç¤Ï @c NULL ¤òÊÖ¤¹¡£
+      */
+
+MInputContext *
+minput_create_ic (MInputMethod *im, void *arg)
 {
-  MInputMethodInfo *im_info = (MInputMethodInfo *) ic->im->info;
-  MInputContextInfo *ic_info = (MInputContextInfo *) ic->info;
-  int i = 0;
+  MInputContext *ic;
 
-  if (! ic_info->state)
+  MDEBUG_PRINT2 ("  [IM] creating context (%s %s) ... ",
+		 msymbol_name (im->name), msymbol_name (im->language));
+  MSTRUCT_CALLOC (ic, MERROR_IM);
+  ic->im = im;
+  ic->arg = arg;
+  ic->preedit = mtext ();
+  ic->candidate_list = NULL;
+  ic->produced = mtext ();
+  ic->spot.x = ic->spot.y = 0;
+  ic->active = 1;
+  ic->plist = mplist ();
+  if ((*im->driver.create_ic) (ic) < 0)
     {
-      ic_info->key_unhandled = 1;
-      return 0;
-    }
-  mtext_reset (ic->produced);
-  ic->status_changed = ic->preedit_changed = ic->candidates_changed = 0;
-  M17N_OBJECT_UNREF (ic_info->preceding_text);
-  M17N_OBJECT_UNREF (ic_info->following_text);
-  MLIST_APPEND1 (ic_info, keys, key, MERROR_IM);
-  ic_info->key_unhandled = 0;
+      MDEBUG_PRINT (" failed\n");
+      M17N_OBJECT_UNREF (ic->preedit);
+      M17N_OBJECT_UNREF (ic->produced);
+      M17N_OBJECT_UNREF (ic->plist);
+      free (ic);
+      return NULL;
+    };
 
-  /* If KEY has Meta or Alt modifier, put M_key_alias property.  */
-  if (! msymbol_get (key, M_key_alias)
-      && (strchr (MSYMBOL_NAME (key), 'M')
-	  || strchr (MSYMBOL_NAME (key), 'A')))
+  if (im->driver.callback_list)
     {
-      char *name = MSYMBOL_NAME (key);
-      char *meta_or_alt;
-
-      while (name[0] && name[1] == '-'
-	     && (name[0] != 'M' && name[0] != 'A'))
-	name += 2;
-      if ((name[0] == 'M' || name[0] == 'A') && name[1] == '-')
-	{
-	  MSymbol alias;
-
-	  meta_or_alt = name;
-	  name = alloca (MSYMBOL_NAMELEN (key) + 1);
-	  memcpy (name, MSYMBOL_NAME (key), MSYMBOL_NAMELEN (key) + 1);
-	  name[meta_or_alt - MSYMBOL_NAME (key)]
-	    = *meta_or_alt == 'M' ? 'A' : 'M';
-	  alias = msymbol (name);
-	  msymbol_put (key, M_key_alias, alias);
-	}
+      minput__callback (ic, Minput_preedit_start);
+      minput__callback (ic, Minput_status_start);
+      minput__callback (ic, Minput_status_draw);
     }
-  else if (MSYMBOL_NAME (key)[0] == 'S'
-	   && MSYMBOL_NAME (key)[1] == '-'
-	   && MSYMBOL_NAME (key)[2] >= 'A' && MSYMBOL_NAME (key)[2] <= 'Z')
-    msymbol_put (key, M_key_alias, one_char_symbol[(int)MSYMBOL_NAME (key)[2]]);
 
-  do {
-    if (handle_key (ic) < 0)
-      {
-	/* KEY was not handled.  Delete it from the current key sequence.  */
-	if (ic_info->used > 0)
-	  {
-	    memmove (ic_info->keys, ic_info->keys + 1,
-		     sizeof (int) * (ic_info->used - 1));
-	    ic_info->used--;
-	  }
-	/* This forces returning 1.  */
-	ic_info->key_unhandled = 1;
-	break;
-      }
-    if (i++ == 100)
-      {
-	mdebug_hook ();
-	reset_ic (ic, Mnil);
-	ic_info->key_unhandled = 1;
-	break;
-      }
-    /* Break the loop if all keys were handled.  */
-  } while (ic_info->key_head < ic_info->used);
+  MDEBUG_PRINT (" ok\n");
+  return ic;
+}
 
-  /* If the current map is the root of the initial state, we should
-     produce any preedit text in ic->produced.  */
-  if (ic_info->map == ((MIMState *) MPLIST_VAL (im_info->states))->map
-      && mtext_nchars (ic->preedit) > 0)
-    shift_state (ic, ((MIMState *) MPLIST_VAL (im_info->states))->name);
+/*=*/
 
-  if (mtext_nchars (ic->produced) > 0)
-    {
-      MSymbol lang = msymbol_get (ic->im->language, Mlanguage);
+/***en
+    @brief Destroy an input context.
 
-      if (lang != Mnil)
-	mtext_put_prop (ic->produced, 0, mtext_nchars (ic->produced),
-			Mlanguage, ic->im->language);
-    }
+    The minput_destroy_ic () function destroys the input context $IC,
+    which must have been created by minput_create_ic ().  It calls
+    callback functions corresponding to #Minput_preedit_done,
+    #Minput_status_done, and #Minput_candidates_done in this order.  */
 
-  return (! ic_info->key_unhandled && mtext_nchars (ic->produced) == 0);
+/***ja
+    @brief ÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È¤òÇ˲õ¤¹¤ë.
+
+    ´Ø¿ô minput_destroy_ic () ¤Ï¡¢ÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È $IC ¤òÇ˲õ¤¹¤ë¡£
+    ¤³¤ÎÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È¤Ï minput_create_ic () 
+    ¤Ë¤è¤Ã¤Æºî¤é¤ì¤¿¤â¤Î¤Ç¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£¤³¤Î´Ø¿ô¤Ï 
+    #Minput_preedit_done, #Minput_status_done, #Minput_candidates_done 
+    ¤ËÂбþ¤¹¤ë¥³¡¼¥ë¥Ð¥Ã¥¯´Ø¿ô¤ò¤³¤Î½ç¤Ë¸Æ¤Ö¡£
+  */
+
+void
+minput_destroy_ic (MInputContext *ic)
+{
+  MDEBUG_PRINT2 ("  [IM] destroying context (%s %s) ... ",
+		 msymbol_name (ic->im->name), msymbol_name (ic->im->language));
+  if (ic->im->driver.callback_list)
+    {
+      minput__callback (ic, Minput_preedit_done);
+      minput__callback (ic, Minput_status_done);
+      minput__callback (ic, Minput_candidates_done);
+    }
+  (*ic->im->driver.destroy_ic) (ic);
+  M17N_OBJECT_UNREF (ic->preedit);
+  M17N_OBJECT_UNREF (ic->produced);
+  M17N_OBJECT_UNREF (ic->plist);
+  MDEBUG_PRINT (" done\n");
+  free (ic);
 }
 
+/*=*/
 
-/** Return 1 if the last event or key was not handled, otherwise
-    return 0.
+/***en
+    @brief Filter an input key.
 
-    There is no need of looking up because ic->produced should already
-    contain the produced text (if any).
+    The minput_filter () function filters input key $KEY according to
+    input context $IC, and calls callback functions corresponding to
+    #Minput_preedit_draw, #Minput_status_draw, and
+    #Minput_candidates_draw if the preedit text, the status, and the
+    current candidate are changed respectively.
 
-    Ignore KEY.  */
+    To make the input method commit the current preedit text (if any)
+    and shift to the initial state, call this function with #Mnil as
+    $KEY.
 
-static int
-lookup (MInputContext *ic, MSymbol key, void *arg, MText *mt)
-{
-  mtext_cat (mt, ic->produced);
-  mtext_reset (ic->produced);
-  return (((MInputContextInfo *) ic->info)->key_unhandled ? -1 : 0);
-}
+    To inform the input method about the focus-out event, call this
+    function with #Minput_focus_out as $KEY.
+
+    To inform the input method about the focus-in event, call this
+    function with #Minput_focus_in as $KEY.
+
+    To inform the input method about the focus-move event (i.e. input
+    spot change within the same input context), call this function
+    with #Minput_focus_move as $KEY.
 
-static MPlist *load_im_info_keys;
+    @return
+    If $KEY is filtered out, this function returns 1.  In that case,
+    the caller should discard the key.  Otherwise, it returns 0, and
+    the caller should handle the key, for instance, by calling the
+    function minput_lookup () with the same key.  */
 
-static MPlist *
-load_partial_im_info (MSymbol language, MSymbol name,
-		      MSymbol extra, MSymbol key)
-{
-  MDatabase *mdb;
-  MPlist *plist;
+/***ja
+    @brief ÆþÎÏ¥­¡¼¤ò¥Õ¥£¥ë¥¿¤¹¤ë.
 
-  if (language == Mnil)
-    MERROR (MERROR_IM, NULL);
-  mdb = mdatabase_find (Minput_method, language, name, extra);
-  if (! mdb)
-    MERROR (MERROR_IM, NULL);
+    ´Ø¿ô minput_filter () ¤ÏÆþÎÏ¥­¡¼ $KEY ¤òÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È $IC 
+    ¤Ë±þ¤¸¤Æ¥Õ¥£¥ë¥¿¤·¡¢preedit ¥Æ¥­¥¹¥È¡¢¥¹¥Æ¡¼¥¿¥¹¡¢¸½»þÅÀ¤Ç¤Î¸õÊ䤬ÊѲ½¤·¤¿»þÅÀ¤Ç¡¢¤½¤ì¤¾¤ì
+    #Minput_preedit_draw, #Minput_status_draw,
+    #Minput_candidates_draw ¤ËÂбþ¤¹¤ë¥³¡¼¥ë¥Ð¥Ã¥¯´Ø¿ô¤ò¸Æ¤Ö¡£
 
-  mplist_push (load_im_info_keys, key, Mt);
-  plist = mdatabase__load_for_keys (mdb, load_im_info_keys);
-  mplist_pop (load_im_info_keys);
-  return plist;
-}
+    @return 
+    $KEY ¤¬¥Õ¥£¥ë¥¿¤µ¤ì¤ì¤Ð¡¢¤³¤Î´Ø¿ô¤Ï 1 ¤òÊÖ¤¹¡£
+    ¤³¤Î¾ì¹ç¸Æ¤Ó½Ð¤·Â¦¤Ï¤³¤Î¥­¡¼¤ò¼Î¤Æ¤ë¤Ù¤­¤Ç¤¢¤ë¡£
+    ¤½¤¦¤Ç¤Ê¤±¤ì¤Ð 0 ¤òÊÖ¤·¡¢¸Æ¤Ó½Ð¤·Â¦¤Ï¡¢¤¿¤È¤¨¤ÐƱ¤¸¥­¡¼¤Ç´Ø¿ô minput_lookup ()
+    ¤ò¸Æ¤Ö¤Ê¤É¤·¤Æ¡¢¤³¤Î¥­¡¼¤ò½èÍý¤¹¤ë¡£
 
+    @latexonly \IPAlabel{minput_filter} @endlatexonly
+*/
 
-static MInputMethodInfo *
-get_im_info (MSymbol language, MSymbol name, MSymbol extra)
+int
+minput_filter (MInputContext *ic, MSymbol key, void *arg)
 {
-  MDatabase *mdb;
-  MPlist *plist;
-  MInputMethodInfo *im_info = NULL;
+  int ret;
 
-  if (language == Mnil)
-    MERROR (MERROR_IM, NULL);
-  mdb = mdatabase_find (Minput_method, language, name, extra);
-  if (! mdb)
-    MERROR (MERROR_IM, NULL);
+  if (! ic
+      || ! ic->active)
+    return 0;
+  ret = (*ic->im->driver.filter) (ic, key, arg);
 
-  if (! im_info_list)
-    im_info_list = mplist ();
-  else if ((plist = mplist_find_by_value (im_info_list, mdb)))
+  if (ic->im->driver.callback_list)
     {
-      if (mdatabase__check (mdb))
-	{
-	  plist = MPLIST_NEXT (plist);
-	  im_info = MPLIST_VAL (plist);
-	  return im_info;
-	}
-      mplist_pop (plist);
-      free_im_info (MPLIST_VAL (plist));
-      mplist_pop (plist);
+      if (ic->preedit_changed)
+	minput__callback (ic, Minput_preedit_draw);
+      if (ic->status_changed)
+	minput__callback (ic, Minput_status_draw);
+      if (ic->candidates_changed)
+	minput__callback (ic, Minput_candidates_draw);
     }
 
-  plist = mdatabase_load (mdb);
-  if (! plist)
-    MERROR (MERROR_IM, NULL);
-  im_info = load_im_info (language, name, plist);
-  M17N_OBJECT_UNREF (plist);
-  if (! im_info)
-    MERROR (MERROR_IM, NULL);
-  mplist_push (im_info_list, Mt, im_info);
-  mplist_push (im_info_list, Mt, mdb);
-  return im_info;
+  return ret;
 }
 
-
-/* Input method command handler.  */
+/*=*/
 
-/* List of all (global and local) commands. 
-   (LANG:(IM-NAME:(COMMAND ...) ...) ...) ...
-   COMMAND is CMD-NAME:(mtext:DESCRIPTION plist:KEYSEQ ...))
-   Global commands are storead as (t (t COMMAND ...))  */
+/***en
+    @brief Look up a text produced in the input context.
 
-/* Check if PLIST is a valid command key sequence.
-   PLIST must be NULL or:
-   [ symbol:KEY | integer:KEY ] ...  */
+    The minput_lookup () function looks up a text in the input context
+    $IC.  $KEY must be identical to the one that was used in the previous call of
+    minput_filter ().
 
-static int
-check_command_keyseq (MPlist *plist)
-{
-  if (! plist)
-    return 0;
-  MPLIST_DO (plist, plist)
-    {
-      if (MPLIST_SYMBOL_P (plist))
-	continue;
-      else if (MPLIST_INTEGER_P (plist))
-	{
-	  int n = MPLIST_INTEGER (plist);
+    If a text was produced by the input method, it is concatenated
+    to M-text $MT.
 
-	  if (n < 0 || n > 9)
-	    return -1;
-	  MPLIST_KEY (plist) = Msymbol;
-	  MPLIST_VAL (plist) = one_char_symbol['0' + 9];
-	}
-      else
-	return -1;
-    }
-  return 0;
-}
+    This function calls #MInputDriver::lookup .
 
-/* Check if PLIST has this form:
-     ([ plist:([ symbol:KEY | integer:KEY ]) | mtext:KEYSEQ ]
-      ...)
-   If the form of PLIST matches, return 0, otherwise return -1.  */
+    @return
+    If $KEY was correctly handled by the input method, this function
+    returns 0.  Otherwise, it returns -1, even though some text
+    might be produced in $MT.  */
 
-static int
-check_command_list (MPlist *plist)
-{
-  MPLIST_DO (plist, plist)
-    {
-      if (MPLIST_PLIST_P (plist))
-	{
-	  MPlist *pl = MPLIST_PLIST (plist);
+/***ja
+    @brief ÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥ÈÃæ¤Î¥Æ¥­¥¹¥È¤òõ¤¹.
 
-	  MPLIST_DO (pl, pl)
-	    if (! MPLIST_SYMBOL_P (pl) && ! MPLIST_INTEGER_P (pl))
-	      return -1;
-	}
-      else if (! MPLIST_MTEXT_P (plist))
-	return -1;
-    }
-  return 0;
-}
+    ´Ø¿ô minput_lookup () ¤ÏÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È $IC Ãæ¤Î¥Æ¥­¥¹¥È¤òõ¤¹¡£
+    $KEY ¤Ï´Ø¿ô minput_filter () ¤Ø¤ÎľÁ°¤Î¸Æ¤Ó½Ð¤·¤ËÍѤ¤¤é¤ì¤¿¤â¤Î¤ÈƱ¤¸¤Ç¤Ê¤¯¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£
 
+    ¥Æ¥­¥¹¥È¤¬ÆþÎϥ᥽¥Ã¥É¤Ë¤è¤Ã¤ÆÀ¸À®¤µ¤ì¤Æ¤¤¤ì¤Ð¡¢¥Æ¥­¥¹¥È¤Ï M-text
+    $MT ¤ËÏ¢·ë¤µ¤ì¤ë¡£
 
-
-/* Input method variable handler.  */
+    ¤³¤Î´Ø¿ô¤Ï¡¢#MInputDriver::lookup ¤ò¸Æ¤Ö¡£
 
-/* Check if PLIST has this form:
-     (TYPE:VAL   ;; TYPE ::= integer | mtext | symbol
-      VALID-VALUE
-      ...)
-   If the form of PLIST matches, return 0, otherwise return -1.  */
+    @return 
+    $KEY ¤¬ÆþÎϥ᥽¥Ã¥É¤Ë¤è¤Ã¤ÆŬÀڤ˽èÍý¤Ç¤­¤ì¤Ð¡¢¤³¤Î´Ø¿ô¤Ï 0 ¤òÊÖ¤¹¡£
+    ¤½¤¦¤Ç¤Ê¤±¤ì¤Ð -1 ¤òÊÖ¤¹¡£
+    ¤³¤Î¾ì¹ç¤Ç¤â $MT ¤Ë²¿¤é¤«¤Î¥Æ¥­¥¹¥È¤¬À¸À®¤µ¤ì¤Æ¤¤¤ë¤³¤È¤¬¤¢¤ë¡£
 
-static int
-check_variable_list (MPlist *plist)
-{
-  MSymbol type = MPLIST_KEY (plist);
-  MPlist *p; 
+    @latexonly \IPAlabel{minput_lookup} @endlatexonly  */
 
-  if (type != Minteger && type != Mtext && type != Msymbol)
-    return -1;
-  MPLIST_DO (plist, MPLIST_NEXT (plist))
-    {
-      if (type == Minteger && MPLIST_PLIST_P (plist))
-	{
-	  MPLIST_DO (p, MPLIST_PLIST (plist))
-	    if (! MPLIST_INTEGER_P (p))
-	      return -1;
-	}
-      else if (type != MPLIST_KEY (plist))
-	return -1;
-    }
-  return 0;
+int
+minput_lookup (MInputContext *ic, MSymbol key, void *arg, MText *mt)
+{
+  return (ic ? (*ic->im->driver.lookup) (ic, key, arg, mt) : -1);
 }
+/*=*/
 
-/* Support functions for mdebug_dump_im.  */
+/***en
+    @brief Set the spot of the input context.
 
-static void
-dump_im_map (MPlist *map_list, int indent)
-{
-  char *prefix;
-  MSymbol key = MPLIST_KEY (map_list);
-  MIMMap *map = (MIMMap *) MPLIST_VAL (map_list);
+    The minput_set_spot () function sets the spot of input context $IC
+    to coordinate ($X, $Y ) with the height specified by $ASCENT and $DESCENT .
+    The semantics of these values depends on the input method driver.
 
-  prefix = (char *) alloca (indent + 1);
-  memset (prefix, 32, indent);
-  prefix[indent] = '\0';
+    For instance, a driver designed to work in a CUI environment may
+    use $X and $Y as the column- and row numbers, and may ignore $ASCENT and
+    $DESCENT .  A driver designed to work in a window system may
+    interpret $X and $Y as the pixel offsets relative to the origin of the
+    client window, and may interpret $ASCENT and $DESCENT as the ascent- and
+    descent pixels of the line at ($X . $Y ).
 
-  fprintf (stderr, "(\"%s\" ", msymbol_name (key));
-  if (map->map_actions)
-    mdebug_dump_plist (map->map_actions, indent + 2);
-  if (map->submaps)
-    {
-      MPLIST_DO (map_list, map->submaps)
-	{
-	  fprintf (stderr, "\n%s  ", prefix);
-	  dump_im_map (map_list, indent + 2);
-	}
-    }
-  if (map->branch_actions)
-    {
-      fprintf (stderr, "\n%s  (branch\n%s    ", prefix, prefix);
-      mdebug_dump_plist (map->branch_actions, indent + 4);
-      fprintf (stderr, ")");      
-    }
-  fprintf (stderr, ")");
-}
+    $FONTSIZE specifies the fontsize of preedit text in 1/10 point.
 
+    $MT and $POS are the M-text and the character position at the spot.
+    $MT may be @c NULL, in which case, the input method cannot get
+    information about the text around the spot.  */
 
-static void
-dump_im_state (MIMState *state, int indent)
-{
-  char *prefix;
-  MPlist *map_list;
+/***ja
+    @brief ÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È¤Î¥¹¥Ý¥Ã¥È¤òÀßÄꤹ¤ë.
 
-  prefix = (char *) alloca (indent + 1);
-  memset (prefix, 32, indent);
-  prefix[indent] = '\0';
+    ´Ø¿ô minput_set_spot () ¤Ï¡¢ÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È $IC ¤Î¥¹¥Ý¥Ã¥È¤ò¡¢ºÂɸ ($X, $Y )
+    ¤Î°ÌÃÖ¤Ë ¡¢¹â¤µ $ASCENT¡¢ $DESCENT 
+    ¤ÇÀßÄꤹ¤ë¡£ ¤³¤ì¤é¤ÎÃͤΰÕÌ£¤ÏÆþÎϥ᥽¥Ã¥É¥É¥é¥¤¥Ð¤Ë°Í¸¤¹¤ë¡£
 
-  fprintf (stderr, "(%s", msymbol_name (state->name));
-  if (state->map->submaps)
-    {
-      MPLIST_DO (map_list, state->map->submaps)
-	{
-	  fprintf (stderr, "\n%s  ", prefix);
-	  dump_im_map (map_list, indent + 2);
-	}
-    }
-  fprintf (stderr, ")");
-}
+    ¤¿¤È¤¨¤Ð CUI ´Ä¶­¤ÇÆ°ºî¤¹¤ë¥É¥é¥¤¥Ð¤Ï $X ¤È $Y 
+    ¤ò¤½¤ì¤¾¤ìÎó¤È¹Ô¤ÎÈÖ¹æ¤È¤·¤ÆÍѤ¤¡¢$ASCENT ¤È $DESCENT 
+    ¤ò̵»ë¤¹¤ë¤«¤â¤·¤ì¤Ê¤¤¡£ ¤Þ¤¿¥¦¥£¥ó¥É¥¦¥·¥¹¥Æ¥àÍѤΥɥ饤¥Ð¤Ï
+    $X ¤È $Y ¤ò¥¯¥é¥¤¥¢¥ó¥È¥¦¥£¥ó¥É¥¦¤Î¸¶ÅÀ¤«¤é¤Î¥ª¥Õ¥»¥Ã¥È¤ò¥Ô¥¯¥»¥ëñ°Ì¤Çɽ¤·¤¿¤â¤Î¤È¤·¤Æ°·¤¤¡¢
+    $ASCENT ¤È $DESCENT ¤ò ($X . $Y )
+    ¤ÎÎó¤Î¥¢¥»¥ó¥È¤È¥Ç¥£¥»¥ó¥È¤ò¥Ô¥¯¥»¥ëñ°Ì¤Çɽ¤·¤¿¤â¤Î¤È¤·¤Æ°·¤¦¤«¤â¤·¤ì¤Ê¤¤¡£
 
-
+    $FONTSIZE ¤Ë¤Ï preedit ¥Æ¥­¥¹¥È¤Î¥Õ¥©¥ó¥È¥µ¥¤¥º¤ò 1/10 ¥Ý¥¤¥ó¥Èñ°Ì¤Ç»ØÄꤹ¤ë¡£
 
-int
-minput__init ()
-{
-  char *key_names[32]
-    = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-	"BackSpace", "Tab", "Linefeed", "Clear", NULL, "Return", NULL, NULL,
-	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-	NULL, NULL, NULL, "Escape", NULL, NULL, NULL, NULL };
-  char buf[6], buf2[256];
-  int i;
-  MPlist *plist;
+    $MT ¤È $POS ¤Ï¤½¤Î¥¹¥Ý¥Ã¥È¤Î M-text ¤Èʸ»ú°ÌÃ֤Ǥ¢¤ë¡£$MT ¤Ï @c
+    NULL ¤Ç¤â¤è¤¯¡¢¤½¤Î¾ì¹ç¤Ë¤ÏÆþÎϥ᥽¥Ã¥É¤Ï¥¹¥Ý¥Ã¥È¼þÊդΥƥ­¥¹¥È¤Ë´Ø¤¹¤ë¾ðÊó¤òÆÀ¤ë¤³¤È¤¬¤Ç¤­¤Ê¤¤¡£
+    */
 
-  Minput_method = msymbol ("input-method");
-  Minput_driver = msymbol ("input-driver");
-  Mtitle = msymbol ("title");
-  Mmacro = msymbol ("macro");
-  Mmodule = msymbol ("module");
-  Mmap = msymbol ("map");
-  Mstate = msymbol ("state");
-  Minclude = msymbol ("include");
-  Minsert = msymbol ("insert");
-  M_candidates = msymbol ("  candidates");
-  Mdelete = msymbol ("delete");
-  Mmove = msymbol ("move");
-  Mmark = msymbol ("mark");
-  Mpushback = msymbol ("pushback");
-  Mundo = msymbol ("undo");
-  Mcall = msymbol ("call");
-  Mshift = msymbol ("shift");
-  Mselect = msymbol ("select");
-  Mshow = msymbol ("show");
-  Mhide = msymbol ("hide");
-  Mcommit = msymbol ("commit");
-  Munhandle = msymbol ("unhandle");
-  Mset = msymbol ("set");
-  Madd = msymbol ("add");
-  Msub = msymbol ("sub");
-  Mmul = msymbol ("mul");
-  Mdiv = msymbol ("div");
-  Mequal = msymbol ("=");
-  Mless = msymbol ("<");
-  Mgreater = msymbol (">");
-  Mless_equal = msymbol ("<=");
-  Mgreater_equal = msymbol (">=");
-  Mcond = msymbol ("cond");
-  Mplus = msymbol ("+");
-  Mminus = msymbol ("-");
-  Mstar = msymbol ("*");
-  Mslush = msymbol ("/");
-  Mand = msymbol ("&");
-  Mor = msymbol ("|");
-  Mnot = msymbol ("!");
+void
+minput_set_spot (MInputContext *ic, int x, int y,
+		 int ascent, int descent, int fontsize,
+		 MText *mt, int pos)
+{
+  ic->spot.x = x;
+  ic->spot.y = y;
+  ic->spot.ascent = ascent;
+  ic->spot.descent = descent;
+  ic->spot.fontsize = fontsize;
+  ic->spot.mt = mt;
+  ic->spot.pos = pos;
+  if (ic->im->driver.callback_list)
+    minput__callback (ic, Minput_set_spot);
+}
+/*=*/
 
-  Mcandidates_group_size = msymbol ("candidates-group-size");
-  Mcandidates_charset = msymbol ("candidates-charset");
+/***en
+    @brief Toggle input method.
 
-  Minput_preedit_start = msymbol ("input-preedit-start");
-  Minput_preedit_done = msymbol ("input-preedit-done");
-  Minput_preedit_draw = msymbol ("input-preedit-draw");
-  Minput_status_start = msymbol ("input-status-start");
-  Minput_status_done = msymbol ("input-status-done");
-  Minput_status_draw = msymbol ("input-status-draw");
-  Minput_candidates_start = msymbol ("input-candidates-start");
-  Minput_candidates_done = msymbol ("input-candidates-done");
-  Minput_candidates_draw = msymbol ("input-candidates-draw");
-  Minput_set_spot = msymbol ("input-set-spot");
-  Minput_focus_move = msymbol ("input-focus-move");
-  Minput_focus_in = msymbol ("input-focus-in");
-  Minput_focus_out = msymbol ("input-focus-out");
-  Minput_toggle = msymbol ("input-toggle");
-  Minput_reset = msymbol ("input-reset");
-  Minput_get_surrounding_text = msymbol ("input-get-surrounding-text");
-  Minput_delete_surrounding_text = msymbol ("input-delete-surrounding-text");
+    The minput_toggle () function toggles the input method associated
+    with input context $IC.  */
+/***ja
+    @brief ÆþÎϥ᥽¥Ã¥É¤òÀÚÂؤ¨¤ë.
 
-  Mcandidate_list = msymbol_as_managing_key ("  candidate-list");
-  Mcandidate_index = msymbol ("  candidate-index");
+    ´Ø¿ô minput_toggle () ¤ÏÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È $IC 
+    ¤ËÂбþÉÕ¤±¤é¤ì¤¿ÆþÎϥ᥽¥Ã¥É¤ò¥È¥°¥ë¤¹¤ë¡£
+    */
 
-  Minit = msymbol ("init");
-  Mfini = msymbol ("fini");
+void
+minput_toggle (MInputContext *ic)
+{
+  if (ic->im->driver.callback_list)
+    minput__callback (ic, Minput_toggle);
+  ic->active = ! ic->active;
+}
 
-  M_key_alias = msymbol ("  key-alias");
-  M_description = msymbol ("description");
-  M_command = msymbol ("command");
-  M_variable = msymbol ("variable");
+/*=*/
 
-  load_im_info_keys = mplist ();
-  plist = mplist_add (load_im_info_keys, Mstate, Mnil);
+/***en
+    @brief Reset an input context.
 
-  buf[0] = 'C';
-  buf[1] = '-';
-  buf[3] = '\0';
-  for (i = 0, buf[2] = '@'; i < ' '; i++, buf[2]++)
-    {
-      MSymbol alias;
+    The minput_reset_ic () function resets input context $IC by
+    calling a callback function corresponding to #Minput_reset.  It
+    resets the status of $IC to its initial one.  As the
+    current preedit text is deleted without commitment, if necessary,
+    call minput_filter () with the arg @r key #Mnil to force the input
+    method to commit the preedit in advance.  */
 
-      one_char_symbol[i] = msymbol (buf);
-      if (key_names[i])
-	{
-	  alias = msymbol (key_names[i]);
-	  msymbol_put (one_char_symbol[i], M_key_alias,  alias);
-	}
-      else
-	alias = one_char_symbol[i];
-      buf[2] += (i == 0) ? -32 : 32;
-      msymbol_put (alias, M_key_alias,  msymbol (buf));
-      buf[2] -= (i == 0) ? -32 : 32;
-    }
-  for (buf[2] = i; i < 127; i++, buf[2]++)
-    one_char_symbol[i] = msymbol (buf + 2);
-  one_char_symbol[i++] = msymbol ("Delete");
-  buf[2] = 'M';
-  buf[3] = '-';
-  buf[5] = '\0';
-  buf2[0] = 'M';
-  buf2[1] = '-';
-  for (buf[4] = '@'; i < 160; i++, buf[4]++)
-    {
-      one_char_symbol[i] = msymbol (buf);
-      if (key_names[i - 128])
-	{
-	  strcpy (buf2 + 2, key_names[i - 128]);
-	  msymbol_put (one_char_symbol[i], M_key_alias,  msymbol (buf2));
-	}
-    }
-  for (buf[4] = i - 128; i < 255; i++, buf[4]++)
-    one_char_symbol[i] = msymbol (buf + 2);
-  one_char_symbol[i] = msymbol ("M-Delete");
+/***ja
+    @brief ÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È¤ò¥ê¥»¥Ã¥È¤¹¤ë.
 
-  command_list = variable_list = NULL;
+    ´Ø¿ô minput_reset_ic () ¤Ï #Minput_reset ¤ËÂбþ¤¹¤ë¥³¡¼¥ë¥Ð¥Ã¥¯´Ø¿ô
+    ¤ò¸Æ¤Ö¤³¤È¤Ë¤è¤Ã¤ÆÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È $IC ¤ò¥ê¥»¥Ã¥È¤¹¤ë¡£¥ê¥»¥Ã¥È¤È¤Ï¡¢
+    ¼ÂºÝ¤Ë¤ÏÆþÎϥ᥽¥Ã¥É¤ò½é´ü¾õÂ֤˰ܤ¹¤³¤È¤Ç¤¢¤ë¡£¸½ºßÆþÎÏÃæ¤Î¥Æ¥­¥¹
+    ¥È¤Ï¥³¥ß¥Ã¥È¤µ¤ì¤ë¤³¤È¤Ê¤¯ºï½ü¤µ¤ì¤ë¤Î¤Ç¡¢¥¢¥×¥ê¥±¡¼¥·¥ç¥ó¥×¥í¥°¥é
+    ¥à¤Ï¡¢É¬Íפʤé¤Ðͽ¤á minput_filter () ¤ò°ú¿ô @r key #Mnil ¤Ç¸Æ¤ó¤Ç
+    ¶¯À©Åª¤Ë¥×¥ê¥¨¥Ç¥£¥Ã¥È¥Æ¥­¥¹¥È¤ò¥³¥ß¥Ã¥È¤µ¤»¤ë¤³¤È¡£  */
 
-  minput_default_driver.open_im = open_im;
-  minput_default_driver.close_im = close_im;
-  minput_default_driver.create_ic = create_ic;
-  minput_default_driver.destroy_ic = destroy_ic;
-  minput_default_driver.filter = filter;
-  minput_default_driver.lookup = lookup;
-  minput_default_driver.callback_list = mplist ();
-  mplist_put (minput_default_driver.callback_list, Minput_reset,
-	      (void *) reset_ic);
-  minput_driver = &minput_default_driver;
-  return 0;
+void
+minput_reset_ic (MInputContext *ic)
+{
+  if (ic->im->driver.callback_list)
+    minput__callback (ic, Minput_reset);
 }
 
-void
-minput__fini ()
+/*=*/
+
+/***en
+    @brief Get title and icon filename of an input method.
+
+    The minput_get_title_icon () function returns a plist containing a
+    title and icon filename (if any) of an input method specified by
+    $LANGUAGE and $NAME.
+
+    The first element of the plist has key #Mtext and the value is an
+    M-text of the title for identifying the input method.  The second
+    element (if any) has key #Mtext and the value is an M-text of the
+    icon image (absolute) filename for the same purpose.
+
+    @return
+    If there exists a specified input method and it defines an title,
+    a plist is returned.  Otherwise, NULL is returned.  The caller
+    must free the plist by m17n_object_unref ().  */
+/***ja
+    @brief ÆþÎϥ᥽¥Ã¥É¤Î¥¿¥¤¥È¥ë¤È¥¢¥¤¥³¥óÍÑ¥Õ¥¡¥¤¥ë̾¤òÆÀ¤ë.
+
+    ´Ø¿ô minput_get_title_icon () ¤Ï¡¢ $LANGUAGE ¤È $NAME ¤Ç»ØÄꤵ¤ì¤ë
+    ÆþÎϥ᥽¥Ã¥É¤Î¥¿¥¤¥È¥ë¤È¡Ê¤¢¤ì¤Ð¡Ë¥¢¥¤¥³¥óÍÑ¥Õ¥¡¥¤¥ë¤ò´Þ¤à plist ¤ò
+    ÊÖ¤¹¡£
+
+    plist ¤ÎÂè°ìÍ×ÁǤϡ¢#Mtext ¤ò¥­¡¼¤Ë»ý¤Á¡¢ÃͤÏÆþÎϥ᥽¥Ã¥É¤ò¼±Ê̤¹¤ë
+    ¥¿¥¤¥È¥ë¤òɽ¤¹ M-text ¤Ç¤¢¤ë¡£ÂèÆóÍ×ÁǤ¬¤¢¤ì¤Ð¡¢¥­¡¼¤Ï #Mtext ¤Ç¤¢
+    ¤ê¡¢Ãͤϼ±ÊÌÍÑ¥¢¥¤¥³¥ó²èÁü¤ÎÀäÂÐ¥Õ¥¡¥¤¥ë¥Í¡¼¥à¤òɽ¤¹ M-text ¤Ç¤¢¤ë¡£
+
+    @return
+    »ØÄê¤ÎÆþÎϥ᥽¥Ã¥É¤¬Â¸ºß¤·¡¢¥¿¥¤¥È¥ë¤¬ÄêµÁ¤µ¤ì¤Æ¤¤¤ì¤Ð
+     plist ¤òÊÖ¤¹¡£¤½¤¦¤Ç¤Ê¤±¤ì¤Ð NULL ¤òÊÖ¤¹¡£¸Æ½Ð¦¤Ï
+     ´Ø¿ô m17n_object_unref () ¤òÍѤ¤¤Æ plist ¤ò²òÊü¤·¤Ê¤¯¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£  */
+
+MPlist *
+minput_get_title_icon (MSymbol language, MSymbol name)
 {
-  if (command_list)
-    {
-      M17N_OBJECT_UNREF (command_list);
-      command_list = NULL;
-    }
-  if (variable_list)
-    {
-      M17N_OBJECT_UNREF (variable_list);
-      variable_list = NULL;
-    }
+  MInputMethodInfo *im_info;
+  MPlist *plist;
+  char *file = NULL;
+  MText *mt;
 
-  if (minput_default_driver.callback_list)
-    {
-      M17N_OBJECT_UNREF (minput_default_driver.callback_list);
-      minput_default_driver.callback_list = NULL;
-    }
-  if (minput_driver->callback_list)
-    {
-      M17N_OBJECT_UNREF (minput_driver->callback_list);
-      minput_driver->callback_list = NULL;
-    }
+  MINPUT__INIT ();
 
-  if (im_info_list)
+  im_info = get_im_info (language, name, Mnil, Mtitle);
+  if (! im_info || !im_info->title)
+    return NULL;
+  mt = mtext_get_prop (im_info->title, 0, Mtext);
+  if (mt)
+    file = mdatabase__find_file ((char *) MTEXT_DATA (mt));
+  else
     {
-      while (! MPLIST_TAIL_P (im_info_list))
+      char *buf = alloca (MSYMBOL_NAMELEN (language) + MSYMBOL_NAMELEN (name)
+			  + 12);
+
+      sprintf (buf, "icons/%s-%s.png", (char *) MSYMBOL_NAME (language), 
+	       (char *) MSYMBOL_NAME (name));
+      file = mdatabase__find_file (buf);
+      if (! file && language == Mt)
 	{
-	  /* Pop (t . mdb) */
-	  mplist_pop (im_info_list);
-	  free_im_info ((MInputMethodInfo *) MPLIST_VAL (im_info_list));
-	  /* Pop (t . im_info) */
-	  mplist_pop (im_info_list);
+	  sprintf (buf, "icons/%s.png", (char *) MSYMBOL_NAME (name));
+	  file = mdatabase__find_file (buf);
 	}
-      M17N_OBJECT_UNREF (im_info_list);
-      im_info_list = NULL;
     }
- 
-  M17N_OBJECT_UNREF (load_im_info_keys);
-}
 
-void
-minput__callback (MInputContext *ic, MSymbol command)
-{
-  if (ic->im->driver.callback_list)
+  plist = mplist ();
+  mplist_add (plist, Mtext, im_info->title);
+  if (file)
     {
-      MInputCallbackFunc func
-	= (MInputCallbackFunc) mplist_get (ic->im->driver.callback_list,
-					   command);
-
-      if (func)
-	(func) (ic, command);
+      mt = mtext__from_data (file, strlen (file), MTEXT_FORMAT_UTF_8, 1);
+      free (file);
+      mplist_add (plist, Mtext, mt);
+      M17N_OBJECT_UNREF (mt);
     }
+  return plist;
 }
 
-MSymbol
-minput__char_to_key (int c)
-{
-  if (c < 0 || c >= 0x100)
-    return Mnil;
-
-  return one_char_symbol[c];
-}
-
-/*** @} */
-#endif /* !FOR_DOXYGEN || DOXYGEN_INTERNAL_MODULE */
-
-
-/* External API */
-
-/*** @addtogroup m17nInputMethod */
-/*** @{ */
 /*=*/
 
 /***en
-    @name Variables: Predefined symbols for callback commands.
+    @brief Get description text of an input method.
 
-    These are the predefined symbols that are used as the @c COMMAND
-    argument of callback functions of an input method driver (see
-    #MInputDriver::callback_list ).  
+    The minput_get_description () function returns an M-text that
+    describes the input method specified by $LANGUAGE and $NAME.
 
-    Most of them don't require extra argument nor return any value;
-    exceptions are these:
+    @return
+    If the specified input method has a description text, a pointer to
+    #MText is returned.  The caller has to free it by m17n_object_unref ().
+    If the input method does not have a description text, @c NULL is
+    returned.  */
+/***ja
+    @brief ÆþÎϥ᥽¥Ã¥É¤ÎÀâÌÀ¥Æ¥­¥¹¥È¤òÆÀ¤ë.
 
-    Minput_get_surrounding_text: When a callback function assigned for
-    this command is called, the first element of #MInputContext::plist
-    has key #Msymbol and the value specifies which portion of the
-    surrounding text should be retrieved.  If the value is positive,
-    it specifies the number of characters following the current cursor
-    position.  If the value is negative, the absolute value specifies
-    the number of characters preceding the current cursor position.
-    The callback function must set the key of this element to #Mtext
-    and the value to the retrived M-text (whose length may be shorter
-    than the requested number of characters if the available text is
-    not that long, or it may be longer if an application thinks it's
-    more efficient to return that length).
+    ´Ø¿ô minput_get_description () ¤Ï¡¢$LANGUAGE ¤È $NAME ¤Ë¤è¤Ã¤Æ»ØÄê
+    ¤µ¤ì¤¿ÆþÎϥ᥽¥Ã¥É¤òÀâÌÀ¤¹¤ë M-text ¤òÊÖ¤¹¡£
 
-    Minput_delete_surrounding_text: When a callback function assigned
-    for this command is called, the first element of
-    #MInputContext::plist has key #Msymbol and the value specifies
-    which portion of the surrounding text should be deleted in the
-    same way as the case of Minput_get_surrounding_text.  The callback
-    function must delete the specified text.  It should not alter
-    #MInputContext::plist.  */ 
+    @return »ØÄꤵ¤ì¤¿ÆþÎϥ᥽¥Ã¥É¤¬ÀâÌÀ¤¹¤ë¥Æ¥­¥¹¥È¤ò»ý¤Ã¤Æ¤¤¤ì¤Ð¡¢
+    #MText ¤Ø¤Î¥Ý¥¤¥ó¥¿¤òÊÖ¤¹¡£¸Æ¤Ó½Ð¤·Â¦¤Ï¡¢¤½¤ì¤ò m17n_object_unref
+    () ¤òÍѤ¤¤Æ²òÊü¤·¤Ê¤¯¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£ÆþÎϥ᥽¥Ã¥É¤ËÀâÌÀ¥Æ¥­¥¹¥È¤¬Ìµ¤±
+    ¤ì¤Ð@c NULL ¤òÊÖ¤¹¡£ */
 
-/***ja
-    @name ÊÑ¿ô¡§ ¥³¡¼¥ë¥Ð¥Ã¥¯¥³¥Þ¥ó¥ÉÍÑÄêµÁºÑ¤ß¥·¥ó¥Ü¥ë.
+MText *
+minput_get_description (MSymbol language, MSymbol name)
+{
+  MInputMethodInfo *im_info;
+  MSymbol extra;
 
-    ÆþÎϥ᥽¥Ã¥É¥É¥é¥¤¥Ð¤Î¥³¡¼¥ë¥Ð¥Ã¥¯´Ø¿ô¤Ë¤ª¤¤¤Æ @c COMMAND 
-    °ú¿ô¤È¤·¤ÆÍѤ¤¤é¤ì¤ëÄêµÁºÑ¤ß¥·¥ó¥Ü¥ë (#MInputDriver::callback_list »²¾È)¡£
-      */ 
-/*** @{ */ 
-/*=*/
+  MINPUT__INIT ();
 
-MSymbol Minput_preedit_start;
-MSymbol Minput_preedit_done;
-MSymbol Minput_preedit_draw;
-MSymbol Minput_status_start;
-MSymbol Minput_status_done;
-MSymbol Minput_status_draw;
-MSymbol Minput_candidates_start;
-MSymbol Minput_candidates_done;
-MSymbol Minput_candidates_draw;
-MSymbol Minput_set_spot;
-MSymbol Minput_toggle;
-MSymbol Minput_reset;
-MSymbol Minput_get_surrounding_text;
-MSymbol Minput_delete_surrounding_text;
-/*** @} */
+  if (name != Mnil)
+    extra = Mnil;
+  else
+    extra = language, language = Mt;
+
+  im_info = get_im_info (language, name, extra, Mdescription);
+  if (! im_info || ! im_info->description)
+    return NULL;
+  M17N_OBJECT_REF (im_info->description);
+  return im_info->description;
+}
 
 /*=*/
 
 /***en
-    @name Variables: Predefined symbols for special input events.
+    @brief Get information about input method command(s).
 
-    These are the predefined symbols that are used as the @c KEY
-    argument of minput_filter ().  */ 
+    The minput_get_command () function returns information about
+    the command $COMMAND of the input method specified by $LANGUAGE and
+    $NAME.  An input method command is a pseudo key event to which one
+    or more actual input key sequences are assigned.
 
-/*** @{ */ 
-/*=*/
+    There are two kinds of commands, global and local.  A global
+    command has a global definition, and the description and the key
+    assignment may be inherited by a local command.  Each input method
+    defines a local command which has a local key assignment.  It may
+    also declare a local command that inherits the definition of a
+    global command of the same name.
 
-MSymbol Minput_focus_out;
-MSymbol Minput_focus_in;
-MSymbol Minput_focus_move;
+    If $LANGUAGE is #Mt and $NAME is #Mnil, this function returns
+    information about a global command.  Otherwise information about a
+    local command is returned.
 
-/*** @} */
+    If $COMMAND is #Mnil, information about all commands is returned.
 
-/*=*/
+    The return value is a @e well-formed plist (#m17nPlist) of this
+    format:
+@verbatim
+  ((NAME DESCRIPTION STATUS [KEYSEQ ...]) ...)
+@endverbatim
+    @c NAME is a symbol representing the command name.
 
-/***en
-    @brief The default driver for internal input methods.
+    @c DESCRIPTION is an M-text describing the command, or #Mnil if the
+    command has no description.
 
-    The variable #minput_default_driver is the default driver for
-    internal input methods.
+    @c STATUS is a symbol representing how the key assignment is decided.
+    The value is #Mnil (the default key assignment), #Mcustomized (the
+    key assignment is customized by per-user configuration file), or
+    #Mconfigured (the key assignment is set by the call of
+    minput_config_command ()).  For a local command only, it may also
+    be #Minherited (the key assignment is inherited from the
+    corresponding global command).
 
-    The member MInputDriver::open_im () searches the m17n database for
-    an input method that matches the tag \< #Minput_method, $LANGUAGE,
-    $NAME\> and loads it.
+    @c KEYSEQ is a plist of one or more symbols representing a key
+    sequence assigned to the command.  If there's no KEYSEQ, the
+    command is currently disabled (i.e. no key sequence can trigger
+    actions of the command).
 
-    The member MInputDriver::callback_list () is @c NULL.  Thus, it is
-    programmers responsibility to set it to a plist of proper callback
-    functions.  Otherwise, no feedback information (e.g. preedit text)
-    can be shown to users.
+    If $COMMAND is not #Mnil, the first element of the returned plist
+    contains the information about $COMMAND.
 
-    The macro M17N_INIT () sets the variable #minput_driver to the
-    pointer to this driver so that all internal input methods use it.
+    @return
 
-    Therefore, unless @c minput_driver is set differently, the driver
-    dependent arguments $ARG of the functions whose name begin with
-    "minput_" are all ignored.  */
+    If the requested information was found, a pointer to a non-empty
+    plist is returned.  As the plist is kept in the library, the
+    caller must not modify nor free it.
 
+    Otherwise (the specified input method or the specified command
+    does not exist), @c NULL is returned.  */
 /***ja
-    @brief ÆâÉôÆþÎϥ᥽¥Ã¥ÉÍѥǥե©¥ë¥È¥É¥é¥¤¥Ð.
+    @brief ÆþÎϥ᥽¥Ã¥É¤Î¥³¥Þ¥ó¥É¤Ë´Ø¤¹¤ë¾ðÊó¤òÆÀ¤ë.
+
+    ´Ø¿ô minput_get_command () ¤Ï¡¢$LANGUAGE ¤È $NAME ¤Ç»ØÄꤵ¤ì¤ëÆþÎÏ
+    ¥á¥½¥Ã¥É¤Î¥³¥Þ¥ó¥É $COMMAND ¤Ë´Ø¤¹¤ë¾ðÊó¤òÊÖ¤¹¡£ÆþÎϥ᥽¥Ã¥É¤Î¥³¥Þ
+    ¥ó¥É¤È¤Ï¡¢µ¿»÷¥­¡¼¥¤¥Ù¥ó¥È¤Ç¤¢¤ê¡¢£±¤Ä°Ê¾å¤Î¼ÂºÝ¤ÎÆþÎÏ¥­¡¼¥·¡¼¥¯¥¨
+    ¥ó¥¹¤¬³ä¤êÅö¤Æ¤é¤ì¤ë¡£
+
+    ¥³¥Þ¥ó¥É¤Ë¤Ï¡¢¥°¥í¡¼¥Ð¥ë¤È¥í¡¼¥«¥ë¤Î£²¼ïÎब¤¢¤ë¡£¥°¥í¡¼¥Ð¥ë¤Ê¥³¥Þ¥ó¥É
+    ¤Ï¥°¥í¡¼¥Ð¥ë¤ËÄêµÁ¤µ¤ì¡¢¥í¡¼¥«¥ë¤Ê¥³¥Þ¥ó¥É¤Ï¤½¤ÎÀâÌÀ¤È¥­¡¼³ä¤êÅö¤Æ
+    ¤ò·Ñ¾µ¤¹¤ë¤³¤È¤¬¤Ç¤­¤ë¡£³ÆÆþÎϥ᥽¥Ã¥É¤Ï¥í¡¼¥«¥ë¤Ê¥­¡¼³äÅö¤ò»ý¤Ä¥í¡¼
+    ¥«¥ë¤Ê¥³¥Þ¥ó¥É¤òÄêµÁ¤¹¤ë¡£¤Þ¤¿Æ±Ì¾¤Î¥°¥í¡¼¥Ð¥ë¤Ê¥³¥Þ¥ó¥É¤ÎÄêµÁ¤ò·Ñ
+    ¾µ¤¹¤ë¥í¡¼¥«¥ë¤Ê¥³¥Þ¥ó¥É¤òÀë¸À¤¹¤ë¤³¤È¤â¤Ç¤­¤ë¡£
+
+    $LANGUAGE ¤¬ #Mt ¤Ç $NAME ¤¬ #Mnil ¤Î¾ì¹ç¤Ï¡¢¤³¤Î´Ø¿ô¤Ï¥°¥í¡¼¥Ð¥ë¥³
+    ¥Þ¥ó¥É¤Ë´Ø¤¹¤ë¾ðÊó¤òÊÖ¤¹¡£¤½¤¦¤Ç¤Ê¤±¤ì¤Ð¥í¡¼¥«¥ë¥³¥Þ¥ó¥É¤Ë´Ø¤¹¤ë¤â
+    ¤Î¤òÊÖ¤¹¡£
+
+    $COMMAND ¤¬ #Mnil ¤Î¾ì¹ç¤Ï¡¢¤¹¤Ù¤Æ¤Î¥³¥Þ¥ó¥É¤Ë´Ø¤¹¤ë¾ðÊó¤òÊÖ¤¹¡£
+
+    Ìá¤êÃͤϰʲ¼¤Î·Á¼°¤Î @e well-formed plist (#m17nPlist) ¤Ç¤¢¤ë¡£
+
+@verbatim
+  ((NAME DESCRIPTION STATUS [KEYSEQ ...]) ...)
+@endverbatim
+    @c NAME ¤Ï¥³¥Þ¥ó¥É̾¤ò¼¨¤¹¥·¥ó¥Ü¥ë¤Ç¤¢¤ë¡£
 
-    ÊÑ¿ô #minput_default_driver ¤ÏÆâÉôÆþÎϥ᥽¥Ã¥ÉÍѤΥǥե©¥ë¥È¤Î¥É¥é¥¤¥Ð¤òɽ¤¹¡£
+    @c DESCRIPTION ¤Ï¥³¥Þ¥ó¥É¤òÀâÌÀ¤¹¤ë M-text ¤Ç¤¢¤ë¤«¡¢ÀâÌÀ¤¬Ìµ¤¤¾ì¹ç¤Ë
+    ¤Ï #Mnil ¤Ç¤¢¤ë¡£
 
-    ¥á¥ó¥Ð MInputDriver::open_im () ¤Ï m17n ¥Ç¡¼¥¿¥Ù¡¼¥¹Ã椫¤é¥¿¥° 
-    \< #Minput_method, $LANGUAGE, $NAME\> 
-    ¤Ë¹çÃפ¹¤ëÆþÎϥ᥽¥Ã¥É¤òõ¤·¡¢¤½¤ì¤ò¥í¡¼¥É¤¹¤ë¡£
+    @c STATUS ¤Ï¥­¡¼³ä¤êÅö¤Æ¤¬¤É¤Î¤è¤¦¤ËÄê¤á¤é¤ì¤ë¤«¤ò¤¢¤é¤ï¤¹¥·¥ó¥Ü¥ë¤Ç¤¢
+    ¤ê¡¢¤½¤ÎÃÍ¤Ï #Mnil ¡Ê¥Ç¥Õ¥©¥ë¥È¤Î³ä¤êÅö¤Æ¡Ë, #Mcustomized ¡Ê¥æ¡¼¥¶
+    Ëè¤ÎÀßÄê¥Õ¥¡¥¤¥ë¤Ë¤è¤Ã¤Æ¥«¥¹¥¿¥Þ¥¤¥º¤µ¤ì¤¿³ä¤êÅö¤Æ¡Ë, #Mconfigured
+    ¡Êminput_config_command ()¤ò¸Æ¤Ö¤³¤È¤Ë¤è¤Ã¤ÆÀßÄꤵ¤ì¤ë³ä¤êÅö¤Æ¡Ë¤Î
+    ¤¤¤º¤ì¤«¤Ç¤¢¤ë¡£¥í¡¼¥«¥ë¥³¥Þ¥ó¥É¤Î¾ì¹ç¤Ë¤Ï¡¢#Minherited ¡ÊÂбþ¤¹¤ë
+    ¥°¥í¡¼¥Ð¥ë¥³¥Þ¥ó¥É¤«¤é¤Î·Ñ¾µ¤Ë¤è¤ë³ä¤êÅö¤Æ¡Ë¤Ç¤â¤è¤¤¡£
 
-    ¥á¥ó¥Ð MInputDriver::callback_list () ¤Ï @c NULL ¤Ç¤¢¤ê¡¢
-    ¤·¤¿¤¬¤Ã¤Æ¡¢¥×¥í¥°¥é¥Þ¦¤ÇÀÕǤ¤ò»ý¤Ã¤Æ ŬÀڤʥ³¡¼¥ë¥Ð¥Ã¥¯´Ø¿ô¤Î plist
-    ¤ËÀßÄꤷ¤Ê¤¯¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£¤µ¤â¤Ê¤¤¤È¡¢preedit 
-    ¥Æ¥­¥¹¥È¤Ê¤É¤Î¥Õ¥£¡¼¥É¥Ð¥Ã¥¯¾ðÊ󤬥桼¥¶¤Ëɽ¼¨¤µ¤ì¤Ê¤¤¡£
+    @c KEYSEQ ¤Ï£±¤Ä°Ê¾å¤Î¥·¥ó¥Ü¥ë¤«¤é¤Ê¤ë plist ¤Ç¤¢¤ê¡¢³Æ¥·¥ó¥Ü¥ë¤Ï¥³¥Þ
+    ¥ó¥É¤Ë³ä¤êÅö¤Æ¤é¤ì¤Æ¤¤¤ë¥­¡¼¥·¡¼¥¯¥¨¥ó¥¹¤òɽ¤¹¡£KEYSEQ ¤¬Ìµ¤¤¾ì¹ç¤Ï¡¢
+    ¤½¤Î¥³¥Þ¥ó¥É¤Ï¸½¾õ¤Ç»ÈÍÑÉÔǽ¤Ç¤¢¤ë¡£¡Ê¤¹¤Ê¤ï¤Á¥³¥Þ¥ó¥É¤ÎÆ°ºî¤òµ¯
+    Æ°¤Ç¤­¤ë¥­¡¼¥·¡¼¥¯¥¨¥ó¥¹¤¬Ìµ¤¤¡£¡Ë
 
-    ¥Þ¥¯¥í M17N_INIT () ¤ÏÊÑ¿ô #minput_driver 
-    ¤ò¤³¤Î¥É¥é¥¤¥Ð¤Ø¤Î¥Ý¥¤¥ó¥¿¤ËÀßÄꤷ¡¢Á´¤Æ¤ÎÆâÉôÆþÎϥ᥽¥Ã¥É¤¬¤³¤Î¥É¥é¥¤¥Ð¤ò»È¤¦¤è¤¦¤Ë¤¹¤ë¡£
+    $COMMAND ¤¬ #Mnil ¤Ç¤Ê¤±¤ì¤Ð¡¢ÊÖ¤µ¤ì¤ë plist ¤ÎºÇ½é¤ÎÍ×ÁǤϡ¢
+    $COMMAND ¤Ë´Ø¤¹¤ë¾ðÊó¤ò´Þ¤à¡£
 
-    ¤·¤¿¤¬¤Ã¤Æ¡¢@c minput_driver ¤¬¥Ç¥Õ¥©¥ë¥ÈÃͤΤޤޤǤ¢¤ì¤Ð¡¢minput_ 
-    ¤Ç»Ï¤Þ¤ë´Ø¿ô¤Î¥É¥é¥¤¥Ð¤Ë°Í¸¤¹¤ë°ú¿ô $ARG ¤Ï¤¹¤Ù¤Æ̵»ë¤µ¤ì¤ë¡£  */
+    @return
 
-MInputDriver minput_default_driver;
-/*=*/
+    µá¤á¤é¤ì¤¿¾ðÊ󤬸«¤Ä¤«¤ì¤Ð¡¢¶õ¤Ç¤Ê¤¤ plist ¤Ø¤Î¥Ý¥¤¥ó¥¿¤òÊÖ¤¹¡£¥ê¥¹
+    ¥È¤Ï¥é¥¤¥Ö¥é¥ê¤¬´ÉÍý¤·¤Æ¤¤¤ë¤Î¤Ç¡¢¸Æ½Ð¦¤¬Êѹ¹¤·¤¿¤ê²òÊü¤·¤¿¤ê¤¹¤ë
+    ¤³¤È¤Ï¤Ç¤­¤Ê¤¤¡£
 
-/***en
-    @brief The driver for internal input methods.
+    ¤½¤¦¤Ç¤Ê¤±¤ì¤Ð¡¢¤¹¤Ê¤ï¤Á»ØÄê¤ÎÆþÎϥ᥽¥Ã¥É¤ä¥³¥Þ¥ó¥É¤¬Â¸ºß¤·¤Ê¤±¤ì¤Ð
+    @c NULL ¤òÊÖ¤¹¡£  */
 
-    The variable #minput_driver is a pointer to the input method
-    driver that is used by internal input methods.  The macro
-    M17N_INIT () initializes it to a pointer to #minput_default_driver
-    if <m17n<EM></EM>.h> is included.  */ 
-/***ja
-    @brief ÆâÉôÆþÎϥ᥽¥Ã¥ÉÍѥɥ饤¥Ð.
+#if EXAMPLE_CODE
+MText *
+get_im_command_description (MSymbol language, MSymbol name, MSymbol command)
+{
+  /* Return a description of the command COMMAND of the input method
+     specified by LANGUAGE and NAME.  */
+  MPlist *cmd = minput_get_command (langauge, name, command);
+  MPlist *plist;
 
-    ÊÑ¿ô #minput_driver ¤ÏÆâÉôÆþÎϥ᥽¥Ã¥É¤Ë¤è¤Ã¤Æ»ÈÍѤµ¤ì¤Æ¤¤¤ëÆþÎÏ¥á
-    ¥½¥Ã¥É¥É¥é¥¤¥Ð¤Ø¤Î¥Ý¥¤¥ó¥¿¤Ç¤¢¤ë¡£¥Þ¥¯¥í M17N_INIT () ¤Ï¤³¤Î¥Ý¥¤¥ó
-    ¥¿¤ò#minput_default_driver (<m17n<EM></EM>.h> ¤¬ include ¤µ¤ì¤Æ¤¤¤ë
-    »þ) ¤Ë½é´ü²½¤¹¤ë¡£  */ 
+  if (! cmds)
+    return NULL;
+  plist = mplist_value (cmds);	/* (NAME DESCRIPTION KEY-SEQ ...) */
+  plist = mplist_next (plist);	/* (DESCRIPTION KEY-SEQ ...) */
+  return  (mplist_key (plist) == Mtext
+	   ? (MText *) mplist_value (plist)
+	   : NULL);
+}
+#endif
 
-MInputDriver *minput_driver;
+MPlist *
+minput_get_command (MSymbol language, MSymbol name, MSymbol command)
+{
+  MInputMethodInfo *im_info;
 
-MSymbol Minput_driver;
+  MINPUT__INIT ();
+
+  im_info = get_im_info (language, name, Mnil, Mcommand);
+  if (! im_info
+      || ! im_info->configured_cmds
+      || MPLIST_TAIL_P (im_info->configured_cmds))
+    return NULL;
+  if (command == Mnil)
+    return im_info->configured_cmds;
+  return mplist__assq (im_info->configured_cmds, command);
+}
 
 /*=*/
 
 /***en
-    @brief Open an input method.
+    @brief Configure the key sequence of an input method command.
 
-    The minput_open_im () function opens an input method that matches
-    language $LANGUAGE and name $NAME, and returns a pointer to the
-    input method object newly allocated.
+    The minput_config_command () function assigns a list of key
+    sequences $KEYSEQLIST to the command $COMMAND of the input method
+    specified by $LANGUAGE and $NAME.
 
-    This function at first decides an driver for the input method as
-    below.
+    If $KEYSEQLIST is a non-empty plist, it must be a list of key
+    sequences, and each key sequence must be a plist of symbols.
 
-    If $LANGUAGE is not #Mnil, the driver pointed by the variable
-    #minput_driver is used.
+    If $KEYSEQLIST is an empty plist, the command becomes unusable.
 
-    If $LANGUAGE is #Mnil and $NAME has #Minput_driver property, the
-    driver pointed to by the property value is used to open the input
-    method.  If $NAME has no such property, @c NULL is returned.
+    If $KEYSEQLIST is NULL, the configuration of the command for the
+    input method is canceled, and the default key sequences become
+    effective.  In such case, if $COMMAND is #Mnil, configurations for
+    all commands of the input method are canceled.
 
-    Then, the member MInputDriver::open_im () of the driver is
-    called.  
+    If $NAME is #Mnil, this function configures the key assignment of a
+    global command, not that of a specific input method.
 
-    $ARG is set in the member @c arg of the structure MInputMethod so
-    that the driver can refer to it.  */
+    The configuration takes effect for input methods opened or
+    re-opened later in the current session.  In order to make the
+    configuration take effect for the future session, it must be saved
+    in a per-user configuration file by the function
+    minput_save_config ().
+
+    @return
 
+    If the operation was successful, this function returns 0,
+    otherwise returns -1.  The operation fails in these cases:
+    <ul>
+    <li>$KEYSEQLIST is not in a valid form.
+    <li>$COMMAND is not available for the input method.
+    <li>$LANGUAGE and $NAME do not specify an existing input method.
+    </ul>
+
+    @seealso
+    minput_get_commands (), minput_save_config ().
+*/
 /***ja
-    @brief ÆþÎϥ᥽¥Ã¥É¤ò¥ª¡¼¥×¥ó¤¹¤ë.
+    @brief ÆþÎϥ᥽¥Ã¥É¤Î¥³¥Þ¥ó¥É¤Î¥­¡¼¥·¡¼¥¯¥¨¥ó¥¹¤òÀßÄꤹ¤ë.
 
-    ´Ø¿ô minput_open_im () ¤Ï¸À¸ì $LANGUAGE ¤È̾Á° $NAME 
-    ¤Ë¹çÃפ¹¤ëÆþÎϥ᥽¥Ã¥É¤ò¥ª¡¼¥×¥ó¤·¡¢¿·¤¿¤Ë³ä¤êÅö¤Æ¤é¤ì¤¿ÆþÎϥ᥽¥Ã¥É¥ª¥Ö¥¸¥§¥¯¥È¤Ø¤Î¥Ý¥¤¥ó¥¿¤òÊÖ¤¹¡£
-    
-    ¤³¤Î´Ø¿ô¤Ï¡¢¤Þ¤ºÆþÎϥ᥽¥Ã¥ÉÍѤΥɥ饤¥Ð¤ò°Ê²¼¤Î¤è¤¦¤Ë¤·¤Æ·èÄꤹ¤ë¡£
+    ´Ø¿ô minput_config_command () ¤Ï¥­¡¼¥·¡¼¥¯¥¨¥ó¥¹¤Î¥ê¥¹¥È
+    $KEYSEQLIST ¤ò¡¢$LANGUAGE ¤È $NAME ¤Ë¤è¤Ã¤Æ»ØÄꤵ¤ì¤ëÆþÎϥ᥽¥Ã¥É¤Î
+    ¥³¥Þ¥ó¥É $COMMAND ¤Ë³ä¤êÅö¤Æ¤ë¡£
 
-    $LANGUAGE ¤¬ #Mnil ¤Ç¤Ê¤±¤ì¤Ð¡¢ÊÑ¿ô #minput_driver 
-    ¤Ç»Ø¤µ¤ì¤Æ¤¤¤ë¥É¥é¥¤¥Ð¤òÍѤ¤¤ë¡£
+    $KEYSEQLIST ¤¬¶õ¥ê¥¹¥È¤Ç¤Ê¤±¤ì¤Ð¡¢¥­¡¼¥·¡¼¥¯¥¨¥ó¥¹¤Î¥ê¥¹¥È¤Ç¤¢¤ê¡¢
+    ³Æ¥­¡¼¥·¡¼¥¯¥¨¥ó¥¹¤Ï¥·¥ó¥Ü¥ë¤Î plist ¤Ç¤¢¤ë¡£
 
-    $LANGUAGE ¤¬ #Mnil ¤Ç¤¢¤ê¡¢$NAME ¤¬ #Minput_driver
-    ¥×¥í¥Ñ¥Æ¥£¤ò»ý¤Ä¾ì¹ç¤Ë¤Ï¡¢¤½¤Î¥×¥í¥Ñ¥Æ¥£¤ÎÃͤǻؤµ¤ì¤Æ¤¤¤ëÆþÎϥɥ饤¥Ð¤òÍѤ¤¤ÆÆþÎϥ᥽¥Ã¥É¤ò¥ª¡¼¥×¥ó¤¹¤ë¡£
-    $NAME ¤Ë¤½¤Î¤è¤¦¤Ê¥×¥í¥Ñ¥Æ¥£¤¬Ìµ¤«¤Ã¤¿¾ì¹ç¤Ï @c NULL ¤òÊÖ¤¹¡£
+    $KEYSEQLIST ¤¬¶õ¤Î plist ¤Ê¤é¤Ð¡¢¥³¥Þ¥ó¥É¤Ï»ÈÍѤǤ­¤Ê¤¯¤Ê¤ë¡£
 
-    ¼¡¤¤¤Ç¡¢¥É¥é¥¤¥Ð¤Î¥á¥ó¥Ð MInputDriver::open_im () ¤¬¸Æ¤Ð¤ì¤ë¡£
+    $KEYSEQLIST ¤¬ NULL ¤Ç¤¢¤ì¤Ð¡¢»ØÄê¤ÎÆþÎϥ᥽¥Ã¥É¤Î¥³¥Þ¥ó¥É¤ÎÀßÄê¤Ï
+    ¥­¥ã¥ó¥»¥ë¤µ¤ì¡¢¥Ç¥Õ¥©¥ë¥È¤Î¥­¡¼¥·¡¼¥¯¥¨¥ó¥¹¤¬Í­¸ú¤Ë¤Ê¤ë¡£¤³¤Î¾ì¹ç¡¢
+    $COMMAND ¤¬ #Mnil ¤Ê¤é¤Ð»ØÄê¤ÎÆþÎϥ᥽¥Ã¥É¤ÎÁ´¤Æ¤Î¥³¥Þ¥ó¥É¤ÎÀßÄ꤬
+    ¥­¥ã¥ó¥»¥ë¤µ¤ì¤ë¡£
 
-    $ARG ¤Ï¹½Â¤ÂÎ MInputMethod ¤Î¥á¥ó¥Ð @c arg ¤ËÀßÄꤵ¤ì¡¢¥É¥é¥¤¥Ð¤«¤é»²¾È¤Ç¤­¤ë¡£
+    $NAME ¤¬ #Mnil ¤Ê¤é¤Ð¡¢¤³¤Î´Ø¿ô¤Ï¸Ä¡¹¤ÎÆþÎϥ᥽¥Ã¥É¤Ç¤Ï¤Ê¤¯¥°¥í¡¼¥Ð
+    ¥ë¤Ê¥³¥Þ¥ó¥É¤Î¥­¡¼³ä¤êÅö¤Æ¤òÀßÄꤹ¤ë¡£
 
-    @latexonly \IPAlabel{minput_open} @endlatexonly
+    ¤³¤ì¤é¤ÎÀßÄê¤Ï¡¢¸½¹Ô¤Î¥»¥Ã¥·¥ç¥óÃæ¤ÇÆþÎϥ᥽¥Ã¥É¤¬¥ª¡¼¥×¥ó¡Ê¤Þ¤¿¤Ï
+    ºÆ¥ª¡¼¥×¥ó¡Ë¤µ¤ì¤¿»þÅÀ¤ÇÍ­¸ú¤Ë¤Ê¤ë¡£¾­Íè¤Î¥»¥Ã¥·¥ç¥óÃæ¤Ç¤âÍ­¸ú¤Ë¤¹
+    ¤ë¤¿¤á¤Ë¤Ï¡¢´Ø¿ô minput_save_config () ¤òÍѤ¤¤Æ¥æ¡¼¥¶Ëè¤ÎÀßÄê¥Õ¥¡¥¤
+    ¥ë¤ËÊݸ¤·¤Ê¤¯¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£
+
+    @return
+
+    ¤³¤Î´Ø¿ô¤Ï¡¢½èÍý¤¬À®¸ù¤¹¤ì¤Ð 0 ¤ò¡¢¼ºÇÔ¤¹¤ì¤Ð -1 ¤òÊÖ¤¹¡£¼ºÇԤȤϰʲ¼¤Î¾ì¹ç¤Ç¤¢¤ë¡£
+    <ul>
+    <li>$KEYSEQLIST ¤¬Í­¸ú¤Ê·Á¼°¤Ç¤Ê¤¤¡£
+    <li>$COMMAND ¤¬»ØÄê¤ÎÆþÎϥ᥽¥Ã¥É¤ÇÍøÍѤǤ­¤Ê¤¤¡£
+    <li>$LANGUAGE ¤È $NAME ¤Ç»ØÄꤵ¤ì¤ëÆþÎϥ᥽¥Ã¥É¤¬Â¸ºß¤·¤Ê¤¤¡£
+    </ul>
 
+    @seealso
+    minput_get_commands (), minput_save_config ().
 */
 
-MInputMethod *
-minput_open_im (MSymbol language, MSymbol name, void *arg)
+#if EXAMPLE_CODE
+/* Add "C-x u" to the "start" command of Unicode input method.  */
 {
-  MInputMethod *im;
-  MInputDriver *driver;
+  MSymbol start_command = msymbol ("start");
+  MSymbol unicode = msymbol ("unicode");
+  MPlist *cmd, *plist, *key_seq_list, *key_seq;
 
-  MDEBUG_PRINT2 ("  [IM] opening (%s %s) ... ",
-	 msymbol_name (language), msymbol_name (name));
-  if (language)
-    driver = minput_driver;
-  else
+  /* At first get the current key-sequence assignment.  */
+  cmd = mplist_get_command (Mt, unicode, start_command);
+  if (! cmd)
     {
-      driver = (MInputDriver *) msymbol_get (name, Minput_driver);
-      if (! driver)
-	MERROR (MERROR_IM, NULL);
+      /* The input method does not have the command "start".  Here
+	 should come some error handling code.  */
     }
+  /* Now CMD == ((start DESCRIPTION KEY-SEQUENCE ...) ...).  Extract
+     the part (KEY-SEQUENCE ...).  */
+  plist = mplist_next (mplist_next (mplist_value (cmd)));
+  /* Copy it because we should not modify it directly.  */
+  key_seq_list = mplist_copy (plist);
+  m17n_object_unref (cmds);
+  
+  key_seq = mplist ();
+  mplist_add (key_seq, Msymbol, msymbol ("C-x"));
+  mplist_add (key_seq, Msymbol, msymbol ("u"));
+  mplist_add (key_seq_list, Mplist, key_seq);
+  m17n_object_unref (key_seq);
+
+  minput_config_command (Mt, unicode, start_command, key_seq_list);
+  m17n_object_unref (key_seq_list);
+}
+#endif
 
-  MSTRUCT_CALLOC (im, MERROR_IM);
-  im->language = language;
-  im->name = name;
-  im->arg = arg;
-  im->driver = *driver;
-  if ((*im->driver.open_im) (im) < 0)
+int
+minput_config_command (MSymbol language, MSymbol name, MSymbol command,
+		       MPlist *keyseqlist)
+{
+  MInputMethodInfo *im_info, *config;
+  MPlist *plist;
+
+  MINPUT__INIT ();
+
+  if (keyseqlist)
     {
-      MDEBUG_PRINT (" failed\n");
-      free (im);
-      return NULL;
+      if (command == Mnil)
+	MERROR (MERROR_IM, -1);
+      MPLIST_DO (plist, keyseqlist)
+	if (! MPLIST_PLIST_P (plist)
+	    || ! check_command_keyseq (plist))
+	  MERROR (MERROR_IM, -1);
     }
-  MDEBUG_PRINT (" ok\n");
-  return im;
+
+  im_info = get_im_info (language, name, Mnil, Mcommand);
+  if (! im_info)
+    MERROR (MERROR_IM, -1);
+  if (command != Mnil
+      && (! im_info->cmds
+	  || ! mplist__assq (im_info->cmds, command)))
+    MERROR (MERROR_IM, -1);
+
+  config = get_config_info (im_info);
+  if (! config)
+    {
+      if (! im_config_list)
+	im_config_list = mplist ();
+      config = new_im_info (NULL, language, name, Mnil, im_config_list);
+      config->cmds = mplist ();
+      config->vars = mplist ();
+    }
+
+  if (command == Mnil)
+    {
+      MInputMethodInfo *custom = get_custom_info (im_info);
+
+      mplist_set (config->cmds, Mnil, NULL);
+      if (custom && custom->cmds)
+	{
+	  MPLIST_DO (plist, custom->cmds)
+	    {
+	      command = MPLIST_SYMBOL (MPLIST_PLIST (plist));
+	      plist = mplist ();
+	      mplist_add (plist, Msymbol, command);
+	      mplist_push (config->cmds, Mplist, plist);
+	      M17N_OBJECT_UNREF (plist);
+	    }
+	}
+    }
+  else
+    {
+      plist = mplist__assq (config->cmds, command);
+      if (plist)
+	{
+	  plist = MPLIST_PLIST (plist); /* (NAME [nil KEY-SEQUENCE ...])  */
+	  plist = MPLIST_NEXT (plist);	/* ([nil ...]) */
+	  if (! MPLIST_TAIL_P (plist))
+	    mplist_set (plist, Mnil, NULL); /* () */
+	}
+      else
+	{
+	  plist = mplist ();
+	  mplist_add (config->cmds, Mplist, plist);
+	  M17N_OBJECT_UNREF (plist);
+	  plist = mplist_add (plist, Msymbol, command);
+	  plist = MPLIST_NEXT (plist);
+	}
+      if (keyseqlist)
+	{
+	  MPlist *pl;
+
+	  plist = mplist_add (plist, Msymbol, Mnil);
+	  MPLIST_DO (keyseqlist, keyseqlist)
+	    {
+	      pl = mplist_copy (MPLIST_VAL (keyseqlist));
+	      plist = mplist_add (plist, Mplist, pl);
+	      M17N_OBJECT_UNREF (pl);
+	    }
+	}
+    }
+  config_all_commands (im_info);
+  im_info->tick = time (NULL);
+  return 0;
 }
 
 /*=*/
 
 /***en
-    @brief Close an input method.
+    @brief Get information about input method variable(s).
 
-    The minput_close_im () function closes the input method $IM, which
-    must have been created by minput_open_im ().  */
+    The minput_get_variable () function returns information about
+    the variable $VARIABLE of the input method specified by $LANGUAGE and $NAME.
+    An input method variable controls behavior of an input method.
 
-/***ja
-    @brief ÆþÎϥ᥽¥Ã¥É¤ò¥¯¥í¡¼¥º¤¹¤ë.
+    There are two kinds of variables, global and local.  A global
+    variable has a global definition, and the description and the value
+    may be inherited by a local variable.  Each input method defines a
+    local variable which has local value.  It may also declare a
+    local variable that inherits definition of a global variable of
+    the same name.
 
-    ´Ø¿ô minput_close_im () ¤Ï¡¢ÆþÎϥ᥽¥Ã¥É $IM ¤ò¥¯¥í¡¼¥º¤¹¤ë¡£
-    ¤³¤ÎÆþÎϥ᥽¥Ã¥É $IM ¤Ï minput_open_im () ¤Ë¤è¤Ã¤Æºî¤é¤ì¤¿¤â¤Î¤Ç¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£  */
+    If $LANGUAGE is #Mt and $NAME is #Mnil, information about a global
+    variable is returned.  Otherwise information about a local variable
+    is returned.
 
-void
-minput_close_im (MInputMethod *im)
-{
-  MDEBUG_PRINT2 ("  [IM] closing (%s %s) ... ",
-		 msymbol_name (im->name), msymbol_name (im->language));
-  (*im->driver.close_im) (im);
-  free (im);
-  MDEBUG_PRINT (" done\n");
-}
+    If $VARIABLE is #Mnil, information about all variables is
+    returned.
 
-/*=*/
+    The return value is a @e well-formed plist (#m17nPlist) of this
+    format:
+@verbatim
+  ((NAME DESCRIPTION STATUS VALUE [VALID-VALUE ...]) ...)
+@endverbatim
+    @c NAME is a symbol representing the variable name.
 
-/***en
-    @brief Create an input context.
+    @c DESCRIPTION is an M-text describing the variable, or #Mnil if the
+    variable has no description.
 
-    The minput_create_ic () function creates an input context object
-    associated with input method $IM, and calls callback functions
-    corresponding to #Minput_preedit_start, #Minput_status_start, and
-    #Minput_status_draw in this order.
+    @c STATUS is a symbol representing how the value is decided.  The
+    value is #Mnil (the default value), #Mcustomized (the value is
+    customized by per-user configuration file), or #Mconfigured (the
+    value is set by the call of minput_config_variable ()).  For a
+    local variable only, it may also be #Minherited (the value is
+    inherited from the corresponding global variable).
+
+    @c VALUE is the initial value of the variable.  If the key of this
+    element is #Mt, the variable has no initial value.  Otherwise, the
+    key is #Minteger, #Msymbol, or #Mtext and the value is of the
+    corresponding type.
+
+    @c VALID-VALUEs (if any) specify which values the variable can have.
+    They have the same type (i.e. having the same key) as @c VALUE except
+    for the case that VALUE is an integer.  In that case, @c VALID-VALUE
+    may be a plist of two integers specifying the range of possible
+    values.
+
+    If there no @c VALID-VALUE, the variable can have any value as long
+    as the type is the same as @c VALUE.
+
+    If $VARIABLE is not #Mnil, the first element of the returned plist
+    contains the information about $VARIABLE.
 
     @return
-    If an input context is successfully created, minput_create_ic ()
-    returns a pointer to it.  Otherwise it returns @c NULL.  */
 
+    If the requested information was found, a pointer to a non-empty
+    plist is returned.  As the plist is kept in the library, the
+    caller must not modify nor free it.
+
+    Otherwise (the specified input method or the specified variable
+    does not exist), @c NULL is returned.  */
 /***ja
-    @brief ÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È¤òÀ¸À®¤¹¤ë.
+    @brief ÆþÎϥ᥽¥Ã¥É¤ÎÊÑ¿ô¤Ë´Ø¤¹¤ë¾ðÊó¤òÆÀ¤ë.
 
-    ´Ø¿ô minput_create_ic () ¤ÏÆþÎϥ᥽¥Ã¥É $IM
-    ¤ËÂбþ¤¹¤ëÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È¥ª¥Ö¥¸¥§¥¯¥È¤òÀ¸À®¤·¡¢
-    #Minput_preedit_start, #Minput_status_start, #Minput_status_draw
-    ¤ËÂбþ¤¹¤ë¥³¡¼¥ë¥Ð¥Ã¥¯´Ø¿ô¤ò¤³¤Î½ç¤Ë¸Æ¤Ö¡£
+    ´Ø¿ô minput_get_variable () ¤Ï¡¢$LANGUAGE ¤È $NAME ¤Ç»ØÄꤵ¤ì¤ëÆþÎÏ
+    ¥á¥½¥Ã¥É¤ÎÊÑ¿ô $VARIABLE ¤Ë´Ø¤¹¤ë¾ðÊó¤òÊÖ¤¹¡£ÆþÎϥ᥽¥Ã¥É¤ÎÊÑ¿ô¤È¤Ï¡¢
+    ÆþÎϥ᥽¥Ã¥É¤Î¿¶Éñ¤òÀ©¸æ¤¹¤ë¤â¤Î¤Ç¤¢¤ë¡£
 
-    @return
-    ÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È¤¬À¸À®¤µ¤ì¤¿¾ì¹ç¡¢minput_create_ic () 
-    ¤Ï¤½¤ÎÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È¤Ø¤Î¥Ý¥¤¥ó¥¿¤òÊÖ¤¹¡£¼ºÇÔ¤·¤¿¾ì¹ç¤Ï @c NULL ¤òÊÖ¤¹¡£
-      */
+    ÊÑ¿ô¤Ë¤Ï¡¢¥°¥í¡¼¥Ð¥ë¤È¥í¡¼¥«¥ë¤Î£²¼ïÎब¤¢¤ë¡£¥°¥í¡¼¥Ð¥ë¤ÊÊÑ¿ô¤Ï¥°
+    ¥í¡¼¥Ð¥ë¤ËÄêµÁ¤µ¤ì¡¢¥í¡¼¥«¥ë¤ÊÊÑ¿ô¤Ï¤½¤ÎÀâÌÀ¤ÈÃͤò·Ñ¾µ¤¹¤ë¤³¤È¤¬¤Ç
+    ¤­¤ë¡£³ÆÆþÎϥ᥽¥Ã¥É¤Ï¥í¡¼¥«¥ë¤ÊÃͤò»ý¤Ä¥í¡¼¥«¥ë¤ÊÊÑ¿ô¤òÄêµÁ¤¹¤ë¡£
+    ¤Þ¤¿Æ±Ì¾¤Î¥°¥í¡¼¥Ð¥ë¤ÊÊÑ¿ô¤ÎÄêµÁ¤ò·Ñ¾µ¤¹¤ë¥í¡¼¥«¥ë¤ÊÊÑ¿ô¤òÀë¸À¤¹¤ë
+    ¤³¤È¤â¤Ç¤­¤ë¡£
 
-MInputContext *
-minput_create_ic (MInputMethod *im, void *arg)
-{
-  MInputContext *ic;
+    $LANGUAGE ¤¬ #Mt ¤Ç $NAME ¤¬ #Mnil ¤Î¾ì¹ç¤Ï¡¢¤³¤Î´Ø¿ô¤Ï¥°¥í¡¼¥Ð¥ëÊÑ
+    ¿ô¤Ë´Ø¤¹¤ë¾ðÊó¤òÊÖ¤¹¡£¤½¤¦¤Ç¤Ê¤±¤ì¤Ð¥í¡¼¥«¥ëÊÑ¿ô¤Ë´Ø¤¹¤ë¤â¤Î¤òÊÖ¤¹¡£
 
-  MDEBUG_PRINT2 ("  [IM] creating context (%s %s) ... ",
-		 msymbol_name (im->name), msymbol_name (im->language));
-  MSTRUCT_CALLOC (ic, MERROR_IM);
-  ic->im = im;
-  ic->arg = arg;
-  ic->preedit = mtext ();
-  ic->candidate_list = NULL;
-  ic->produced = mtext ();
-  ic->spot.x = ic->spot.y = 0;
-  ic->active = 1;
-  ic->plist = mplist ();
-  if ((*im->driver.create_ic) (ic) < 0)
-    {
-      MDEBUG_PRINT (" failed\n");
-      M17N_OBJECT_UNREF (ic->preedit);
-      M17N_OBJECT_UNREF (ic->produced);
-      M17N_OBJECT_UNREF (ic->plist);
-      free (ic);
-      return NULL;
-    };
+    $VARIABLE ¤¬ #Mnil ¤Î¾ì¹ç¤Ï¡¢¤¹¤Ù¤Æ¤Î¥³¥Þ¥ó¥É¤Ë´Ø¤¹¤ë¾ðÊó¤òÊÖ¤¹¡£
 
-  if (im->driver.callback_list)
-    {
-      minput__callback (ic, Minput_preedit_start);
-      minput__callback (ic, Minput_status_start);
-      minput__callback (ic, Minput_status_draw);
-    }
+    Ìá¤êÃͤϰʲ¼¤Î·Á¼°¤Î @e well-formed plist (#m17nPlist) ¤Ç¤¢¤ë¡£
+@verbatim
+  ((NAME DESCRIPTION STATUS VALUE [VALID-VALUE ...]) ...)
+@endverbatim
 
-  MDEBUG_PRINT (" ok\n");
-  return ic;
-}
+    @c NAME ¤ÏÊÑ¿ô¤Î̾Á°¤ò¼¨¤¹¥·¥ó¥Ü¥ë¤Ç¤¢¤ë¡£
 
-/*=*/
+    @c DESCRIPTION ¤ÏÊÑ¿ô¤òÀâÌÀ¤¹¤ë M-text ¤Ç¤¢¤ë¤«¡¢ÀâÌÀ¤¬Ìµ¤¤¾ì¹ç¤Ë¤Ï
+    #Mnil ¤Ç¤¢¤ë¡£
 
-/***en
-    @brief Destroy an input context.
+    @c STATUS ¤ÏÃͤ¬¤É¤Î¤è¤¦¤ËÄê¤á¤é¤ì¤ë¤«¤ò¤¢¤é¤ï¤¹¥·¥ó¥Ü¥ë¤Ç¤¢¤ê¡¢
+    @c STATUS ¤ÎÃÍ¤Ï #Mnil ¡Ê¥Ç¥Õ¥©¥ë¥È¤ÎÃÍ¡Ë, #Mcustomized ¡Ê¥æ¡¼¥¶Ëè¤ÎÀß
+    Äê¥Õ¥¡¥¤¥ë¤Ë¤è¤Ã¤Æ¥«¥¹¥¿¥Þ¥¤¥º¤µ¤ì¤¿ÃÍ¡Ë, #Mconfigured
+    ¡Êminput_config_variable ()¤ò¸Æ¤Ö¤³¤È¤Ë¤è¤Ã¤ÆÀßÄꤵ¤ì¤ëÃ͡ˤΤ¤¤º¤ì
+    ¤«¤Ç¤¢¤ë¡£¥í¡¼¥«¥ëÊÑ¿ô¤Î¾ì¹ç¤Ë¤Ï¡¢#Minherited ¡ÊÂбþ¤¹¤ë¥°¥í¡¼¥Ð¥ë
+    ÊÑ¿ô¤«¤é·Ñ¾µ¤·¤¿Ã͡ˤǤâ¤è¤¤¡£
 
-    The minput_destroy_ic () function destroys the input context $IC,
-    which must have been created by minput_create_ic ().  It calls
-    callback functions corresponding to #Minput_preedit_done,
-    #Minput_status_done, and #Minput_candidates_done in this order.  */
+    @c VALUE ¤ÏÊÑ¿ô¤Î½é´üÃͤǤ¢¤ë¡£¤³¤ÎÍ×ÁǤΥ­¡¼¤¬#Mt ¤Ç¤¢¤ì¤Ð½é´üÃͤò»ý
+    ¤¿¤Ê¤¤¡£¤½¤¦¤Ç¤Ê¤±¤ì¤Ð¡¢¥­¡¼¤Ï #Minteger, #Msymbol, #Mtext ¤Î¤¤¤º¤ì
+    ¤«¤Ç¤¢¤ê¡¢ÃͤϤ½¤ì¤¾¤ìÂбþ¤¹¤ë·¿¤Î¤â¤Î¤Ç¤¢¤ë¡£
 
-/***ja
-    @brief ÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È¤òÇ˲õ¤¹¤ë.
+    @c VALID-VALUE ¤Ï¤â¤·¤¢¤ì¤Ð¡¢ÊÑ¿ô¤Î¼è¤êÆÀ¤ëÃͤò»ØÄꤹ¤ë¡£¤³¤ì¤Ï @c VALUE
+    ¤ÈƱ¤¸·¿(¤¹¤Ê¤ï¤ÁƱ¤¸¥­¡¼¤ò»ý¤Ä) ¤Ç¤¢¤ë¤¬¡¢Îã³°¤È¤·¤Æ @c VALUE ¤¬
+    integer ¤Î¾ì¹ç¤Ï @c VALID-VALUE ¤Ï²Äǽ¤ÊÃͤÎÈϰϤò¼¨¤¹Æó¤Ä¤ÎÀ°¿ô¤«¤é
+    ¤Ê¤ë plist ¤È¤Ê¤ë¤³¤È¤¬¤Ç¤­¤ë¡£
 
-    ´Ø¿ô minput_destroy_ic () ¤Ï¡¢ÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È $IC ¤òÇ˲õ¤¹¤ë¡£
-    ¤³¤ÎÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È¤Ï minput_create_ic () 
-    ¤Ë¤è¤Ã¤Æºî¤é¤ì¤¿¤â¤Î¤Ç¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£¤³¤Î´Ø¿ô¤Ï 
-    #Minput_preedit_done, #Minput_status_done, #Minput_candidates_done 
-    ¤ËÂбþ¤¹¤ë¥³¡¼¥ë¥Ð¥Ã¥¯´Ø¿ô¤ò¤³¤Î½ç¤Ë¸Æ¤Ö¡£
-  */
+    @c VALID-VALUE ¤¬¤Ê¤±¤ì¤Ð¡¢ÊÑ¿ô¤Ï @c VALUE ¤ÈƱ¤¸·¿¤Ç¤¢¤ë¸Â¤ê¤¤¤«¤Ê¤ëÃͤâ
+    ¤È¤ë¤³¤È¤¬¤Ç¤­¤ë¡£
 
-void
-minput_destroy_ic (MInputContext *ic)
+    $VARIABLE ¤¬ #Mnil ¤Ç¤Ê¤±¤ì¤Ð¡¢ÊÖ¤µ¤ì¤ë plist ¤ÎºÇ½é¤ÎÍ×ÁǤÏ
+    $VARIABLE ¤Ë´Ø¤¹¤ë¾ðÊó¤ò´Þ¤à¡£
+
+    @return
+
+    µá¤á¤é¤ì¤¿¾ðÊ󤬸«¤Ä¤«¤ì¤Ð¡¢¶õ¤Ç¤Ê¤¤ plist ¤Ø¤Î¥Ý¥¤¥ó¥¿¤òÊÖ¤¹¡£¥ê¥¹
+    ¥È¤Ï¥é¥¤¥Ö¥é¥ê¤¬´ÉÍý¤·¤Æ¤¤¤ë¤Î¤Ç¡¢¸Æ½Ð¦¤¬Êѹ¹¤·¤¿¤ê²òÊü¤·¤¿¤ê¤¹¤ë
+    ¤³¤È¤Ï¤Ç¤­¤Ê¤¤¡£
+
+    ¤½¤¦¤Ç¤Ê¤±¤ì¤Ð¡¢¤¹¤Ê¤ï¤Á»ØÄê¤ÎÆþÎϥ᥽¥Ã¥É¤äÊÑ¿ô¤¬Â¸ºß¤·¤Ê¤±¤ì¤Ð
+    @c NULL ¤òÊÖ¤¹¡£ */
+
+MPlist *
+minput_get_variable (MSymbol language, MSymbol name, MSymbol variable)
 {
-  MDEBUG_PRINT2 ("  [IM] destroying context (%s %s) ... ",
-		 msymbol_name (ic->im->name), msymbol_name (ic->im->language));
-  if (ic->im->driver.callback_list)
-    {
-      minput__callback (ic, Minput_preedit_done);
-      minput__callback (ic, Minput_status_done);
-      minput__callback (ic, Minput_candidates_done);
-    }
-  (*ic->im->driver.destroy_ic) (ic);
-  M17N_OBJECT_UNREF (ic->preedit);
-  M17N_OBJECT_UNREF (ic->produced);
-  M17N_OBJECT_UNREF (ic->plist);
-  MDEBUG_PRINT (" done\n");
-  free (ic);
+  MInputMethodInfo *im_info;
+
+  MINPUT__INIT ();
+
+  im_info = get_im_info (language, name, Mnil, Mvariable);
+  if (! im_info || ! im_info->configured_vars)
+    return NULL;
+  if (variable == Mnil)
+    return im_info->configured_vars;
+  return mplist__assq (im_info->configured_vars, variable);
 }
 
 /*=*/
 
 /***en
-    @brief Filter an input key.
+    @brief Configure the value of an input method variable.
 
-    The minput_filter () function filters input key $KEY according to
-    input context $IC, and calls callback functions corresponding to
-    #Minput_preedit_draw, #Minput_status_draw, and
-    #Minput_candidates_draw if the preedit text, the status, and the
-    current candidate are changed respectively.
+    The minput_config_variable () function assigns $VALUE to the
+    variable $VARIABLE of the input method specified by $LANGUAGE and
+    $NAME.
 
-    To make the input method commit the current preedit text (if any)
-    and shift to the initial state, call this function with #Mnil as
-    $KEY.
+    If $VALUE is not NULL, it must be a plist of one element whose key
+    is #Minteger, #Msymbol, or #Mtext, and the value is of the
+    corresponding type.
 
-    To inform the input method about the focus-out event, call this
-    function with #Minput_focus_out as $KEY.
+    If $VALUE is NULL, a configuration for the variable for the input
+    method is canceled, and the variable is initialized to the default
+    value.  In that case, if $VARIABLE is #Mnil, configurations for
+    all variables of the input method are canceled.
 
-    To inform the input method about the focus-in event, call this
-    function with #Minput_focus_in as $KEY.
+    If $NAME is #Mnil, this function configure the value of global
+    variable, not that of a specific input method.
 
-    To inform the input method about the focus-move event (i.e. input
-    spot change within the same input context), call this function
-    with #Minput_focus_move as $KEY.
+    The configuration takes effect for input methods opened or
+    re-opened later in the current session.  To make the configuration
+    take effect for the future session, it must be saved in a per-user
+    configuration file by the function minput_save_config ().
 
     @return
-    If $KEY is filtered out, this function returns 1.  In that case,
-    the caller should discard the key.  Otherwise, it returns 0, and
-    the caller should handle the key, for instance, by calling the
-    function minput_lookup () with the same key.  */
 
+    If the operation was successful, this function returns 0,
+    otherwise returns -1.  The operation fails in these cases:
+    <ul>
+    <li>$VALUE is not in a valid form, the type does not match the
+    definition, or the value is our of range.
+    <li>$VARIABLE is not available for the input method.
+    <li>$LANGUAGE and $NAME do not specify an existing input method.  
+    </ul>
+
+    @seealso
+    minput_get_variable (), minput_save_config ().  */
 /***ja
-    @brief ÆþÎÏ¥­¡¼¤ò¥Õ¥£¥ë¥¿¤¹¤ë.
+    @brief ÆþÎϥ᥽¥Ã¥É¤ÎÊÑ¿ô¤ÎÃͤòÀßÄꤹ¤ë.
 
-    ´Ø¿ô minput_filter () ¤ÏÆþÎÏ¥­¡¼ $KEY ¤òÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È $IC 
-    ¤Ë±þ¤¸¤Æ¥Õ¥£¥ë¥¿¤·¡¢preedit ¥Æ¥­¥¹¥È¡¢¥¹¥Æ¡¼¥¿¥¹¡¢¸½»þÅÀ¤Ç¤Î¸õÊ䤬ÊѲ½¤·¤¿»þÅÀ¤Ç¡¢¤½¤ì¤¾¤ì
-    #Minput_preedit_draw, #Minput_status_draw,
-    #Minput_candidates_draw ¤ËÂбþ¤¹¤ë¥³¡¼¥ë¥Ð¥Ã¥¯´Ø¿ô¤ò¸Æ¤Ö¡£
+    ´Ø¿ô minput_config_variable () ¤ÏÃÍ $VALUE ¤ò¡¢$LANGUAGE ¤È $NAME
+    ¤Ë¤è¤Ã¤Æ»ØÄꤵ¤ì¤ëÆþÎϥ᥽¥Ã¥É¤ÎÊÑ¿ô $VARIABLE ¤Ë³ä¤êÅö¤Æ¤ë¡£
 
-    @return 
-    $KEY ¤¬¥Õ¥£¥ë¥¿¤µ¤ì¤ì¤Ð¡¢¤³¤Î´Ø¿ô¤Ï 1 ¤òÊÖ¤¹¡£
-    ¤³¤Î¾ì¹ç¸Æ¤Ó½Ð¤·Â¦¤Ï¤³¤Î¥­¡¼¤ò¼Î¤Æ¤ë¤Ù¤­¤Ç¤¢¤ë¡£
-    ¤½¤¦¤Ç¤Ê¤±¤ì¤Ð 0 ¤òÊÖ¤·¡¢¸Æ¤Ó½Ð¤·Â¦¤Ï¡¢¤¿¤È¤¨¤ÐƱ¤¸¥­¡¼¤Ç´Ø¿ô minput_lookup ()
-    ¤ò¸Æ¤Ö¤Ê¤É¤·¤Æ¡¢¤³¤Î¥­¡¼¤ò½èÍý¤¹¤ë¡£
+    $VALUE ¤¬ NULL¤Ç¤Ê¤±¤ì¤Ð¡¢£±Í×ÁǤΠplist ¤Ç¤¢¤ê¡¢¤½¤Î¥­¡¼¤Ï
+    #Minteger, #Msymbol, #Mtext ¤Î¤¤¤º¤ì¤«¡¢ÃͤÏÂбþ¤¹¤ë·¿¤Î¤â¤Î¤Ç¤¢¤ë¡£
 
-    @latexonly \IPAlabel{minput_filter} @endlatexonly
-*/
+    $VALUE ¤¬ NULL ¤Ç¤¢¤ì¤Ð¡¢»ØÄê¤ÎÆþÎϥ᥽¥Ã¥É¤ÎÊÑ¿ô¤ÎÀßÄê¤Ï¥­¥ã¥ó¥»¥ë
+    ¤µ¤ì¡¢ÊÑ¿ô¤Ï¥Ç¥Õ¥©¥ë¥ÈÃͤ˽é´ü²½¤µ¤ì¤ë¡£¤³¤Î¾ì¹ç¡¢$VARIABLE ¤¬
+    #Mnil ¤Ê¤é¤Ð»ØÄê¤ÎÆþÎϥ᥽¥Ã¥É¤ÎÁ´¤Æ¤ÎÊÑ¿ô¤ÎÀßÄ꤬¥­¥ã¥ó¥»¥ë¤µ¤ì¤ë¡£
+
+    $NAME ¤¬ #Mnil ¤Ê¤é¤Ð¡¢¤³¤Î´Ø¿ô¤Ï¸Ä¡¹¤ÎÆþÎϥ᥽¥Ã¥É¤Ç¤Ï¤Ê¤¯¥°¥í¡¼¥Ð
+    ¥ë¤ÊÊÑ¿ô¤ÎÃͤòÀßÄꤹ¤ë¡£
+
+    ¤³¤ì¤é¤ÎÀßÄê¤Ï¡¢¸½¹Ô¤Î¥»¥Ã¥·¥ç¥óÃæ¤ÇÆþÎϥ᥽¥Ã¥É¤¬¥ª¡¼¥×¥ó¡Ê¤Þ¤¿¤Ï
+    ºÆ¥ª¡¼¥×¥ó¡Ë¤µ¤ì¤¿»þÅÀ¤ÇÍ­¸ú¤Ë¤Ê¤ë¡£¾­Íè¤Î¥»¥Ã¥·¥ç¥óÃæ¤Ç¤âÍ­¸ú¤Ë¤¹
+    ¤ë¤¿¤á¤Ë¤Ï¡¢´Ø¿ô minput_save_config () ¤òÍѤ¤¤Æ¥æ¡¼¥¶Ëè¤ÎÀßÄê¥Õ¥¡¥¤
+    ¥ë¤ËÊݸ¤·¤Ê¤¯¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£
+
+    @return
+
+    ¤³¤Î´Ø¿ô¤Ï¡¢½èÍý¤¬À®¸ù¤¹¤ì¤Ð 0 ¤ò¡¢¼ºÇÔ¤¹¤ì¤Ð -1 ¤òÊÖ¤¹¡£¼ºÇԤȤϰʲ¼¤Î¾ì¹ç¤Ç¤¢¤ë¡£
+    <ul>
+    <li>$VALUE¤¬Í­¸ú¤Ê·Á¼°¤Ç¤Ê¤¤¡£·¿¤¬ÄêµÁ¤Ë¹ç¤ï¤Ê¤¤¡¢¤Þ¤¿¤ÏÃͤ¬Èϰϳ°¤Ç¤¢¤ë¡£
+    <li>$VARIABLE ¤¬»ØÄê¤ÎÆþÎϥ᥽¥Ã¥É¤ÇÍøÍѤǤ­¤Ê¤¤¡£
+    <li>$LANGUAGE ¤È $NAME ¤Ç»ØÄꤵ¤ì¤ëÆþÎϥ᥽¥Ã¥É¤¬Â¸ºß¤·¤Ê¤¤¡£
+    </ul>
 
+    @seealso
+    minput_get_commands (), minput_save_config ().
+*/
 int
-minput_filter (MInputContext *ic, MSymbol key, void *arg)
+minput_config_variable (MSymbol language, MSymbol name, MSymbol variable,
+			MPlist *value)
 {
-  int ret;
+  MInputMethodInfo *im_info, *config;
+  MPlist *plist;
 
-  if (! ic
-      || ! ic->active)
-    return 0;
-  ret = (*ic->im->driver.filter) (ic, key, arg);
+  MINPUT__INIT ();
 
-  if (ic->im->driver.callback_list)
+  im_info = get_im_info (language, name, Mnil, Mvariable);
+  if (! im_info)
+    MERROR (MERROR_IM, -1);
+  if (variable == Mnil)
     {
-      if (ic->preedit_changed)
-	minput__callback (ic, Minput_preedit_draw);
-      if (ic->status_changed)
-	minput__callback (ic, Minput_status_draw);
-      if (ic->candidates_changed)
-	minput__callback (ic, Minput_candidates_draw);
+      if (value)
+	MERROR (MERROR_IM, -1);
     }
+  else if (! im_info->vars
+	   || ! (plist = mplist__assq (im_info->configured_vars, variable)))
+    MERROR (MERROR_IM, -1);
 
-  return ret;
+  if (variable != Mnil && value)
+    {
+      plist = MPLIST_PLIST (plist);
+      plist = MPLIST_NEXT (plist); /* (DESC STATUS VALUE VALIDS ...) */
+      plist = MPLIST_NEXT (plist); /* (STATUS VALUE VALIDS ...) */
+      plist = MPLIST_NEXT (plist); /* (VALUE VALIDS ...) */
+      if (MPLIST_KEY (plist) != Mt
+	  && ! check_variable_value (value, plist))
+	MERROR (MERROR_IM, -1);
+    }
+
+  config = get_config_info (im_info);
+  if (! config)
+    {
+      if (! im_config_list)
+	im_config_list = mplist ();
+      config = new_im_info (NULL, language, name, Mnil, im_config_list);
+      config->cmds = mplist ();
+      config->vars = mplist ();
+    }
+
+  if (variable == Mnil)
+    {
+      MInputMethodInfo *custom = get_custom_info (im_info);
+
+      mplist_set (config->vars, Mnil, NULL);
+      if (custom && custom->cmds)
+	{
+	  MPLIST_DO (plist, custom->vars)
+	    {
+	      variable = MPLIST_SYMBOL (MPLIST_PLIST (plist));
+	      plist = mplist ();
+	      mplist_add (plist, Msymbol, variable);
+	      mplist_push (config->vars, Mplist, plist);
+	      M17N_OBJECT_UNREF (plist);
+	    }
+	}
+    }
+  else
+    {
+      plist = mplist__assq (config->vars, variable);
+      if (plist)
+	{
+	  plist = MPLIST_PLIST (plist); /* (NAME nil VALUE) */
+	  plist = MPLIST_NEXT (plist);	/* ([nil VALUE]) */
+	  if (! MPLIST_TAIL_P (plist))
+	    mplist_set (plist, Mnil ,NULL); /* () */
+	}
+      else
+	{
+	  plist = mplist ();
+	  mplist_add (config->vars, Mplist, plist);
+	  M17N_OBJECT_UNREF (plist);
+	  plist = mplist_add (plist, Msymbol, variable);
+	  plist = MPLIST_NEXT (plist);
+	}
+      if (value)
+	{
+	  plist = mplist_add (plist, Msymbol, Mnil);
+	  mplist_add (plist, MPLIST_KEY (value), MPLIST_VAL (value));
+	}
+    }
+  config_all_variables (im_info);
+  im_info->tick = time (NULL);
+  return 0;
 }
 
 /*=*/
 
 /***en
-    @brief Look up a text produced in the input context.
+    @brief Get the name of per-user configuration file.
+    
+    The minput_config_file () function returns the absolute path name
+    of per-user configuration file into which minput_save_config ()
+    save configurations.  It is usually @c "config.mic" under the
+    directory @c ".m17n.d" of user's home directory.  It is not assured
+    that the file of the returned name exists nor is
+    readable/writable.  If minput_save_config () fails and returns -1,
+    an application program might check the file, make it
+    writable (if possible), and try minput_save_config () again.
 
-    The minput_lookup () function looks up a text in the input context
-    $IC.  $KEY must be the same one provided to the previous call of
-    minput_filter ().
+    @return
 
-    If a text was produced by the input method, it is concatenated
-    to M-text $MT.
+    This function returns a string.  As the string is kept in the
+    library, the caller must not modify nor free it.
 
-    This function calls #MInputDriver::lookup .
+    @seealso
+    minput_save_config ()
+*/
+/***ja
+    @brief ¥æ¡¼¥¶Ëè¤ÎÀßÄê¥Õ¥¡¥¤¥ë¤Î̾Á°¤òÆÀ¤ë.
+    
+    ´Ø¿ô minput_config_file () ¤Ï¡¢´Ø¿ô minput_save_config () ¤¬ÀßÄê¤ò
+    Êݸ¤¹¤ë¥æ¡¼¥¶Ëè¤ÎÀßÄê¥Õ¥¡¥¤¥ë¤Ø¤ÎÀäÂХѥ¹Ì¾¤òÊÖ¤¹¡£Ä̾ï¤Ï¡¢¥æ¡¼¥¶
+    ¤Î¥Û¡¼¥à¥Ç¥£¥ì¥¯¥È¥ê¤Î²¼¤Î¥Ç¥£¥ì¥¯¥È¥ê @c ".m17n.d" ¤Ë¤¢¤ë@c
+    "config.mic" ¤È¤Ê¤ë¡£ÊÖ¤µ¤ì¤¿Ì¾Á°¤Î¥Õ¥¡¥¤¥ë¤¬Â¸ºß¤¹¤ë¤«¡¢Æɤ߽ñ¤­¤Ç
+    ¤­¤ë¤«¤ÏÊݾڤµ¤ì¤Ê¤¤¡£´Ø¿ôminput_save_config () ¤¬¼ºÇÔ¤·¤Æ -1 ¤òÊÖ
+    ¤·¤¿¾ì¹ç¤Ë¤Ï¡¢¥¢¥×¥ê¥±¡¼¥·¥ç¥ó¥×¥í¥°¥é¥à¤Ï¥Õ¥¡¥¤¥ë¤Î¸ºß¤ò³Îǧ¤·¡¢
+    ¡Ê¤Ç¤­¤ì¤Ð¡Ë½ñ¤­¹þ¤ß²Äǽ¤Ë¤·ºÆÅÙminput_save_config () ¤ò»î¤¹¤³¤È¤¬
+    ¤Ç¤­¤ë¡£
 
     @return
-    If $KEY was correctly handled by the input method, this function
-    returns 0.  Otherwise, returns -1, even in that case, some text
-    may be produced in $MT.  */
 
-/***ja
-    @brief ÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥ÈÃæ¤Î¥Æ¥­¥¹¥È¤òõ¤¹.
+    ¤³¤Î´Ø¿ô¤Ïʸ»úÎó¤òÊÖ¤¹¡£Ê¸»úÎó¤Ï¥é¥¤¥Ö¥é¥ê¤¬´ÉÍý¤·¤Æ¤¤¤ë¤Î¤Ç¡¢¸Æ½Ð
+    ¦¤¬½¤Àµ¤·¤¿¤ê²òÊü¤·¤¿¤ê¤¹¤ë¤³¤È¤Ï¤Ç¤­¤Ê¤¤¡£
 
-    ´Ø¿ô minput_lookup () ¤ÏÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È $IC Ãæ¤Î¥Æ¥­¥¹¥È¤òõ¤¹¡£
-    $KEY ¤Ï´Ø¿ô minput_filter () ¤Ø¤ÎľÁ°¤Î¸Æ¤Ó½Ð¤·¤ËÍѤ¤¤é¤ì¤¿¤â¤Î¤ÈƱ¤¸¤Ç¤Ê¤¯¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£
+    @seealso
+    minput_save_config ()
+*/
 
-    ¥Æ¥­¥¹¥È¤¬ÆþÎϥ᥽¥Ã¥É¤Ë¤è¤Ã¤ÆÀ¸À®¤µ¤ì¤Æ¤¤¤ì¤Ð¡¢¥Æ¥­¥¹¥È¤Ï M-text
-    $MT ¤ËÏ¢·ë¤µ¤ì¤ë¡£
+char *
+minput_config_file ()
+{
+  MINPUT__INIT ();
 
-    ¤³¤Î´Ø¿ô¤Ï¡¢#MInputDriver::lookup ¤ò¸Æ¤Ö¡£
+  return mdatabase__file (im_custom_mdb);
+}
 
-    @return 
-    $KEY ¤¬ÆþÎϥ᥽¥Ã¥É¤Ë¤è¤Ã¤ÆŬÀڤ˽èÍý¤Ç¤­¤ì¤Ð¡¢¤³¤Î´Ø¿ô¤Ï 0 ¤òÊÖ¤¹¡£
-    ¤½¤¦¤Ç¤Ê¤±¤ì¤Ð -1 ¤òÊÖ¤¹¡£
-    ¤³¤Î¾ì¹ç¤Ç¤â $MT ¤Ë²¿¤é¤«¤Î¥Æ¥­¥¹¥È¤¬À¸À®¤µ¤ì¤Æ¤¤¤ë¤³¤È¤¬¤¢¤ë¡£
+/*=*/
 
-    @latexonly \IPAlabel{minput_lookup} @endlatexonly  */
+/***en
+    @brief Save configurations in per-user configuration file.
+
+    The minput_save_config () function saves the configurations done
+    so far in the current session into the per-user configuration
+    file.
+
+    @return
+
+    If the operation was successful, 1 is returned.  If the per-user
+    configuration file is currently locked, 0 is returned.  In that
+    case, the caller may wait for a while and try again.  If the
+    configuration file is not writable, -1 is returned.  In that case,
+    the caller may check the name of the file by calling
+    minput_config_file (), make it writable if possible, and try
+    again.
+
+    @seealso
+    minput_config_file ()  */
+/***ja
+    @brief ÀßÄê¤ò¥æ¡¼¥¶Ëè¤ÎÀßÄê¥Õ¥¡¥¤¥ë¤ËÊݸ¤¹¤ë.
+
+    ´Ø¿ô minput_save_config () ¤Ï¸½¹Ô¤Î¥»¥Ã¥·¥ç¥ó¤Ç¤³¤ì¤Þ¤Ç¤Ë¹Ô¤Ã¤¿ÀßÄê
+    ¤ò¥æ¡¼¥¶Ëè¤ÎÀßÄê¥Õ¥¡¥¤¥ë¤ËÊݸ¤¹¤ë¡£
+
+    @return
+
+    À®¸ù¤¹¤ì¤Ð 1 ¤òÊÖ¤¹¡£¥æ¡¼¥¶Ëè¤ÎÀßÄê¥Õ¥¡¥¤¥ë¤¬¥í¥Ã¥¯¤µ¤ì¤Æ¤¤¤ì¤Ð 0
+    ¤òÊÖ¤¹¡£¤³¤Î¾ì¹ç¡¢¸Æ½Ð¦¤Ï¤·¤Ð¤é¤¯ÂԤäƺƻî¹Ô¤Ç¤­¤ë¡£ÀßÄê¥Õ¥¡¥¤¥ë
+    ¤¬½ñ¤­¹þ¤ßÉԲĤξì¹ç¡¢-1 ¤òÊÖ¤¹¡£¤³¤Î¾ì¹ç¡¢minput_config_file () ¤ò
+    ¸Æ¤ó¤Ç¥Õ¥¡¥¤¥ë̾¤ò¥Á¥§¥Ã¥¯¤·¡¢¤Ç¤­¤ì¤Ð½ñ¤­¹þ¤ß²Äǽ¤Ë¤·¡¢ºÆ»î¹Ô¤Ç¤­
+    ¤ë¡£
+
+    @seealso
+    minput_config_file ()  */
 
 int
-minput_lookup (MInputContext *ic, MSymbol key, void *arg, MText *mt)
+minput_save_config (void)
 {
-  return (ic ? (*ic->im->driver.lookup) (ic, key, arg, mt) : -1);
+  MPlist *data, *tail, *plist, *p, *elt;
+  int ret;
+
+  MINPUT__INIT ();
+  ret = mdatabase__lock (im_custom_mdb);
+  if (ret <= 0)
+    return ret;
+  if (! im_config_list)
+    return 1;
+  update_custom_info ();
+  if (! im_custom_list)
+    im_custom_list = mplist ();
+  data = tail = mplist ();
+
+  MPLIST_DO (plist, im_config_list)
+    {
+      MPlist *pl = MPLIST_PLIST (plist);
+      MSymbol language, name, extra, command, variable;
+      MInputMethodInfo *custom, *config;
+
+      language = MPLIST_SYMBOL (pl);
+      pl = MPLIST_NEXT (pl);
+      name = MPLIST_SYMBOL (pl);
+      pl = MPLIST_NEXT (pl);
+      extra = MPLIST_SYMBOL (pl);
+      pl = MPLIST_NEXT (pl);
+      config = MPLIST_VAL (pl);
+      custom = get_custom_info (config);
+      if (! custom)
+	custom = new_im_info (NULL, language, name, extra, im_custom_list);
+      if (config->cmds)
+	MPLIST_DO (pl, config->cmds)
+	  {
+	    elt = MPLIST_PLIST (pl);
+	    command = MPLIST_SYMBOL (elt);
+	    if (custom->cmds)
+	      p = mplist__assq (custom->cmds, command);
+	    else
+	      custom->cmds = mplist (), p = NULL;
+	    elt = MPLIST_NEXT (elt);
+	    if (MPLIST_TAIL_P (elt))
+	      {
+		if (p)
+		  mplist__pop_unref (p);
+	      }
+	    else
+	      {
+		elt = MPLIST_NEXT (elt);
+		if (p)
+		  {
+		    p = MPLIST_NEXT (MPLIST_NEXT (MPLIST_PLIST (p)));
+		    mplist_set (p, Mnil, NULL);
+		    mplist__conc (p, elt);
+		  }
+		else
+		  {
+		    p = MPLIST_PLIST (pl);
+		    mplist_add (custom->cmds, Mplist, p);
+		  }
+	      }
+	  }
+      if (config->vars)
+	MPLIST_DO (pl, config->vars)
+	  {
+	    elt = MPLIST_PLIST (pl);
+	    variable = MPLIST_SYMBOL (elt);
+	    if (custom->vars)
+	      p = mplist__assq (custom->vars, variable);
+	    else
+	      custom->vars = mplist (), p = NULL;
+	    elt = MPLIST_NEXT (elt);
+	    if (MPLIST_TAIL_P (elt))
+	      {
+		if (p)
+		  mplist__pop_unref (p);
+	      }
+	    else
+	      {
+		elt = MPLIST_NEXT (elt);
+		if (p)
+		  {
+		    p = MPLIST_NEXT (MPLIST_NEXT (MPLIST_PLIST (p)));
+		    mplist_set (p, Mnil, NULL);
+		    mplist__conc (p, elt);
+		  }
+		else
+		  {
+		    p = MPLIST_PLIST (pl);
+		    mplist_add (custom->vars, Mplist, p);
+		  }
+	      }
+	  }
+    }
+  M17N_OBJECT_UNREF (im_config_list);
+
+  MPLIST_DO (plist, im_custom_list)
+    {
+      MPlist *pl = MPLIST_PLIST (plist);
+      MSymbol language, name, extra;
+      MInputMethodInfo *custom, *im_info;
+
+      language = MPLIST_SYMBOL (pl);
+      pl  = MPLIST_NEXT (pl);
+      name = MPLIST_SYMBOL (pl);
+      pl = MPLIST_NEXT (pl);
+      extra = MPLIST_SYMBOL (pl);
+      pl = MPLIST_NEXT (pl);
+      custom = MPLIST_VAL (pl);
+      im_info = lookup_im_info (im_info_list, language, name, extra);
+      if (im_info)
+	{
+	  if (im_info->cmds)
+	    config_all_commands (im_info);
+	  if (im_info->vars)
+	    config_all_variables (im_info);
+	}
+      
+      elt = mplist ();
+      tail = mplist_add (tail, Mplist, elt);
+      M17N_OBJECT_UNREF (elt);
+      pl = mplist ();
+      elt = mplist_add (elt, Mplist, pl);
+      M17N_OBJECT_UNREF (pl);
+      pl = mplist_add (pl, Msymbol, Minput_method);
+      pl = mplist_add (pl, Msymbol, language);
+      pl = mplist_add (pl, Msymbol, name);
+      if (extra != Mnil)
+	pl = mplist_add (pl, Msymbol, extra);
+      if (custom->cmds && ! MPLIST_TAIL_P (custom->cmds))
+	{
+	  pl = mplist ();
+	  elt = mplist_add (elt, Mplist, pl);
+	  M17N_OBJECT_UNREF (pl);
+	  pl = mplist_add (pl, Msymbol, Mcommand);
+	  MPLIST_DO (p, custom->cmds)
+	    pl = mplist_add (pl, Mplist, MPLIST_PLIST (p));
+	}
+      if (custom->vars && ! MPLIST_TAIL_P (custom->vars))
+	{
+	  pl = mplist ();
+	  elt = mplist_add (elt, Mplist, pl);
+	  M17N_OBJECT_UNREF (pl);
+	  pl = mplist_add (pl, Msymbol, Mvariable);
+	  MPLIST_DO (p, custom->vars)
+	    pl = mplist_add (pl, Mplist, MPLIST_PLIST (p));
+	}
+    }
+
+  mplist_push (data, Mstring, ";; -*- mode:lisp; coding:utf-8 -*-");
+  ret = mdatabase__save (im_custom_mdb, data);
+  mdatabase__unlock (im_custom_mdb);
+  M17N_OBJECT_UNREF (data);
+  return (ret < 0 ? -1 : 1);
 }
+
 /*=*/
 
 /***en
-    @brief Set the spot of the input context.
+    @name Obsolete functions
+*/
+/***ja
+    @name Obsolete ¤Ê´Ø¿ô
+*/
+/*** @{ */
 
-    The minput_set_spot () function set the spot of input context $IC
-    to coordinate ($X, $Y ) with the height specified by $ASCENT and $DESCENT .
-    The semantics of these values depend on the input method driver.
+/*=*/
+/***en
+    @brief Get a list of variables of an input method (obsolete).
 
-    For instance, a driver designed to work in a CUI environment may
-    use $X and $Y as column and row numbers, and ignore $ASCENT and
-    $DESCENT .  A driver designed to work in a window system may
-    interpret $X and $Y as pixel offsets relative to the origin of the
-    client window, and may interpret $ASCENT and $DESCENT as the ascent- and
-    descent pixels of the line at ($X . $Y ).
+    This function is obsolete.  Use minput_get_variable () instead.
 
-    $FONTSIZE specifies the fontsize of preedit text in 1/10 point.
+    The minput_get_variables () function returns a plist (#MPlist) of
+    variables used to control the behavior of the input method
+    specified by $LANGUAGE and $NAME.  The plist is @e well-formed
+    (#m17nPlist) of the following format:
 
-    $MT and $POS is the M-text and the character position at the spot.
-    $MT may be @c NULL, in which case, the input method cannot get
-    information about the text around the spot.  */
+@verbatim
+    (VARNAME (DOC-MTEXT DEFAULT-VALUE [ VALUE ... ] )
+     VARNAME (DOC-MTEXT DEFAULT-VALUE [ VALUE ... ] )
+     ...)
+@endverbatim
 
-/***ja
-    @brief ÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È¤Î¥¹¥Ý¥Ã¥È¤òÀßÄꤹ¤ë.
+    @c VARNAME is a symbol representing the variable name.
 
-    ´Ø¿ô minput_set_spot () ¤Ï¡¢ÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È $IC ¤Î¥¹¥Ý¥Ã¥È¤ò¡¢ºÂɸ ($X, $Y )
-    ¤Î°ÌÃÖ¤Ë ¡¢¹â¤µ $ASCENT¡¢ $DESCENT 
-    ¤ÇÀßÄꤹ¤ë¡£ ¤³¤ì¤é¤ÎÃͤΰÕÌ£¤ÏÆþÎϥ᥽¥Ã¥É¥É¥é¥¤¥Ð¤Ë°Í¸¤¹¤ë¡£
+    @c DOC-MTEXT is an M-text describing the variable.
 
-    ¤¿¤È¤¨¤Ð CUI ´Ä¶­¤ÇÆ°ºî¤¹¤ë¥É¥é¥¤¥Ð¤Ï $X ¤È $Y 
-    ¤ò¤½¤ì¤¾¤ìÎó¤È¹Ô¤ÎÈÖ¹æ¤È¤·¤ÆÍѤ¤¡¢$ASCENT ¤È $DESCENT 
-    ¤ò̵»ë¤¹¤ë¤«¤â¤·¤ì¤Ê¤¤¡£ ¤Þ¤¿¥¦¥£¥ó¥É¥¦¥·¥¹¥Æ¥àÍѤΥɥ饤¥Ð¤Ï
-    $X ¤È $Y ¤ò¥¯¥é¥¤¥¢¥ó¥È¥¦¥£¥ó¥É¥¦¤Î¸¶ÅÀ¤«¤é¤Î¥ª¥Õ¥»¥Ã¥È¤ò¥Ô¥¯¥»¥ëñ°Ì¤Çɽ¤·¤¿¤â¤Î¤È¤·¤Æ°·¤¤¡¢
-    $ASCENT ¤È $DESCENT ¤ò ($X . $Y )
-    ¤ÎÎó¤Î¥¢¥»¥ó¥È¤È¥Ç¥£¥»¥ó¥È¤ò¥Ô¥¯¥»¥ëñ°Ì¤Çɽ¤·¤¿¤â¤Î¤È¤·¤Æ°·¤¦¤«¤â¤·¤ì¤Ê¤¤¡£
+    @c DEFAULT-VALUE is the default value of the variable.  It is a
+    symbol, integer, or M-text.
 
-    $FONTSIZE ¤Ë¤Ï preedit ¥Æ¥­¥¹¥È¤Î¥Õ¥©¥ó¥È¥µ¥¤¥º¤ò 1/10 ¥Ý¥¤¥ó¥Èñ°Ì¤Ç»ØÄꤹ¤ë¡£
+    @c VALUEs (if any) specifies the possible values of the variable.
+    If @c DEFAULT-VALUE is an integer, @c VALUE may be a plist (@c FROM
+    @c TO), where @c FROM and @c TO specifies a range of possible
+    values.
 
-    $MT ¤È $POS ¤Ï¤½¤Î¥¹¥Ý¥Ã¥È¤Î M-text ¤Èʸ»ú°ÌÃ֤Ǥ¢¤ë¡£$MT ¤Ï @c
-    NULL ¤Ç¤â¤è¤¯¡¢¤½¤Î¾ì¹ç¤Ë¤ÏÆþÎϥ᥽¥Ã¥É¤Ï¥¹¥Ý¥Ã¥È¼þÊդΥƥ­¥¹¥È¤Ë´Ø¤¹¤ë¾ðÊó¤òÆÀ¤ë¤³¤È¤¬¤Ç¤­¤Ê¤¤¡£
-    */
+    For instance, suppose an input method has the variables:
 
-void
-minput_set_spot (MInputContext *ic, int x, int y,
-		 int ascent, int descent, int fontsize,
-		 MText *mt, int pos)
-{
-  ic->spot.x = x;
-  ic->spot.y = y;
-  ic->spot.ascent = ascent;
-  ic->spot.descent = descent;
-  ic->spot.fontsize = fontsize;
-  ic->spot.mt = mt;
-  ic->spot.pos = pos;
-  if (ic->im->driver.callback_list)
-    minput__callback (ic, Minput_set_spot);
-}
-/*=*/
+    @li name:intvar, description:"value is an integer",
+         initial value:0, value-range:0..3,10,20
 
-/***en
-    @brief Toggle input method.
+    @li name:symvar, description:"value is a symbol",
+         initial value:nil, value-range:a, b, c, nil
 
-    The minput_toggle () function toggles the input method associated
-    with input context $IC.  */
-/***ja
-    @brief ÆþÎϥ᥽¥Ã¥É¤òÀÚÂؤ¨¤ë.
+    @li name:txtvar, description:"value is an M-text",
+         initial value:empty text, no value-range (i.e. any text)
 
-    ´Ø¿ô minput_toggle () ¤ÏÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È $IC 
-    ¤ËÂбþÉÕ¤±¤é¤ì¤¿ÆþÎϥ᥽¥Ã¥É¤ò¥È¥°¥ë¤¹¤ë¡£
-    */
+    Then, the returned plist is as follows.
 
-void
-minput_toggle (MInputContext *ic)
-{
-  if (ic->im->driver.callback_list)
-    minput__callback (ic, Minput_toggle);
-  ic->active = ! ic->active;
-}
+@verbatim
+    (intvar ("value is an integer" 0 (0 3) 10 20)
+     symvar ("value is a symbol" nil a b c nil)
+     txtvar ("value is an M-text" ""))
+@endverbatim
 
-/*=*/
+    @return
+    If the input method uses any variables, a pointer to #MPlist is
+    returned.  As the plist is kept in the library, the caller must not
+    modify nor free it.  If the input method does not use any
+    variable, @c NULL is returned.  */
+/***ja
+    @brief ÆþÎϥ᥽¥Ã¥É¤ÎÊÑ¿ô¥ê¥¹¥È¤òÆÀ¤ë.
 
-/***en
-    @brief Reset an input context.
+    ´Ø¿ô minput_get_variables () ¤Ï¡¢$LANGUAGE ¤È $NAME ¤Ë¤è¤Ã¤Æ»ØÄꤵ
+    ¤ì¤¿ÆþÎϥ᥽¥Ã¥É¤Î¿¶¤ëÉñ¤¤¤òÀ©¸æ¤¹¤ëÊÑ¿ô¤Î¥×¥í¥Ñ¥Æ¥£¥ê¥¹¥È
+    (#MPlist) ¤òÊÖ¤¹¡£¤³¤Î¥ê¥¹¥È¤Ï @e well-formed ¤Ç¤¢¤ê(#m17nPlist) °Ê
+    ²¼¤Î·Á¼°¤Ç¤¢¤ë¡£
 
-    The minput_reset_ic () function resets input context $IC by
-    calling a callback function corresponding to #Minput_reset.  It
-    resets the status of $IC to the one of just after created.  As the
-    current preedit text is deleted without commitment, if necessary,
-    call minput_filter () with the arg @r key #Mnil to force the input
-    method to commit the preedit in advance.  */
+@verbatim
+    (VARNAME (DOC-MTEXT DEFAULT-VALUE [ VALUE ... ] )
+     VARNAME (DOC-MTEXT DEFAULT-VALUE [ VALUE ... ] )
+     ...)
+@endverbatim
 
-/***ja
-    @brief ÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È¤ò¥ê¥»¥Ã¥È¤¹¤ë.
+    @c VARNAME ¤ÏÊÑ¿ô¤Î̾Á°¤ò¼¨¤¹¥·¥ó¥Ü¥ë¤Ç¤¢¤ë¡£
 
-    ´Ø¿ô minput_reset_ic () ¤Ï #Minput_reset 
-    ¤ËÂбþ¤¹¤ë¥³¡¼¥ë¥Ð¥Ã¥¯´Ø¿ô¤ò¸Æ¤Ö¤³¤È¤Ë¤è¤Ã¤ÆÆþÎÏ¥³¥ó¥Æ¥¯¥¹¥È $IC 
-    ¤ò¥ê¥»¥Ã¥È¤¹¤ë¡£¥ê¥»¥Ã¥È¤È¤Ï¡¢¼ÂºÝ¤Ë¤ÏÆþÎϥ᥽¥Ã¥É¤ò½é´ü¾õÂ֤˰ܤ¹¤³¤È¤Ç¤¢¤ê¡¢¤·¤¿¤¬¤Ã¤Æ¡¢¤â¤·¸½ºßÆþÎÏÃæ¤Î¥Æ¥­¥¹¥È¤¬¤¢¤ì¤Ð¡¢¤½¤ì¤Ï¥³¥ß¥Ã¥È¤µ¤ì¤ë¡£
-    ɬÍפʤé¤Ð¡¢¥¢¥×¥ê¥±¡¼¥·¥ç¥ó¥×¥í¥°¥é¥à¤Ï minput_lookup () 
-    ¤òÆɤó¤Ç¤½¤Î¥³¥ß¥Ã¥È¤µ¤ì¤¿¥Æ¥­¥¹¥È¤ò¼è¤ê½Ð¤¹¤³¤È¤¬¤Ç¤­¡¢¤½¤ÎºÝ¡¢
-    minput_lookup () ¤Î°ú¿ô @c KEY ¤È @c ARG 
-    ¤Ï̵»ë¤µ¤ì¤ë¡£ */
-void
-minput_reset_ic (MInputContext *ic)
-{
-  if (ic->im->driver.callback_list)
-    minput__callback (ic, Minput_reset);
-}
+    @c DOC-MTEXT ¤ÏÊÑ¿ô¤òÀâÌÀ¤¹¤ë M-text ¤Ç¤¢¤ë¡£
 
-/*=*/
+    @c DEFAULT-VALUE ¤ÏÊÑ¿ô¤Î¥Ç¥Õ¥©¥ë¥ÈÃͤǤ¢¤ê¡¢¥·¥ó¥Ü¥ë¡¢À°¿ô¤â¤·¤¯¤Ï
+    M-text ¤Ç¤¢¤ë¡£
 
-/***en
-    @brief Get title and icon filename of an input method.
+    @c VALUE ¤Ï¡¢¤â¤·»ØÄꤵ¤ì¤Æ¤¤¤ì¤ÐÊÑ¿ô¤Î¼è¤êÆÀ¤ëÃͤò¼¨¤¹¡£¤â¤·
+    @c DEFAULT-VALUE ¤¬À°¿ô¤Ê¤é¡¢ @c VALUE ¤Ï (@c FROM @c TO) ¤È¤¤¤¦·Á
+    ¤Î¥ê¥¹¥È¤Ç¤âÎɤ¤¡£¤³¤Î¾ì¹ç @c FROM ¤È @c TO ¤Ï²Äǽ¤ÊÃͤÎÈϰϤò¼¨¤¹¡£
 
-    The minput_get_title_icon () function returns a plist containing a
-    title and icon filename (if any) of the input method specifies by
-    $LANGUAGE and $NAME.
+    Îã¤È¤·¤Æ¡¢¤¢¤ëÆþÎϥ᥽¥Ã¥É¤¬¼¡¤Î¤è¤¦¤ÊÊÑ¿ô¤ò»ý¤Ä¾ì¹ç¤ò¹Í¤¨¤è¤¦¡£
 
-    The first element of the plist has key Mtext and the value is an
-    M-text of the title for identifying the input method.  The second
-    element (if any) has key M-text and the value is an M-text of the
-    icon image (absolute) filename for the same purpose.
+    @li name:intvar, ÀâÌÀ:"value is an integer",
+        ½é´üÃÍ:0, ÃͤÎÈÏ°Ï:0..3,10,20
 
-    @return
-    If there exists the specified input method and it defines an
-    title, a plist is retured.  Otherwise, NULL is returned.  A caller
-    must free the plist by m17n_object_unref ().
-*/
+    @li name:symvar, ÀâÌÀ:"value is a symbol",
+         ½é´üÃÍ:nil, ÃͤÎÈÏ°Ï:a, b, c, nil
+
+    @li name:txtvar, ÀâÌÀ:"value is an M-text",
+        ½é´üÃÍ:empty text, ÃͤÎÈϰϤʤ·(¤É¤ó¤Ê M-text ¤Ç¤â²Ä)
+
+    ¤³¤Î¾ì¹ç¡¢ÊÖ¤µ¤ì¤ë¥ê¥¹¥È¤Ï°Ê²¼¤Î¤è¤¦¤Ë¤Ê¤ë¡£
+
+@verbatim
+    (intvar ("value is an integer" 0 (0 3) 10 20)
+     symvar ("value is a symbol" nil a b c nil)
+     txtvar ("value is an M-text" ""))
+@endverbatim
+
+    @return 
+    ÆþÎϥ᥽¥Ã¥É¤¬²¿¤é¤«¤ÎÊÑ¿ô¤ò»ÈÍѤ·¤Æ¤¤¤ì¤Ð #MPlist ¤Ø¤Î¥Ý¥¤¥ó¥¿¤òÊÖ¤¹¡£
+    ÊÖ¤µ¤ì¤ë¥×¥í¥Ñ¥Æ¥£¥ê¥¹¥È¤Ï¥é¥¤¥Ö¥é¥ê¤Ë¤è¤Ã¤Æ´ÉÍý¤µ¤ì¤Æ¤ª¤ê¡¢¸Æ¤Ó½Ð¤·Â¦¤ÇÊѹ¹¤·¤¿¤ê²òÊü¤·¤¿¤ê¤·¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£
+    ÆþÎϥ᥽¥Ã¥É¤¬ÊÑ¿ô¤ò°ìÀÚ»ÈÍѤ·¤Æ¤Ê¤±¤ì¤Ð¡¢@c NULL ¤òÊÖ¤¹¡£  */
 
 MPlist *
-minput_get_title_icon (MSymbol language, MSymbol name)
+minput_get_variables (MSymbol language, MSymbol name)
 {
-  MPlist *plist = load_partial_im_info (language, name, Mnil, Mtitle);
-  MPlist *pl;
-  MText *mt = NULL;
+  MInputMethodInfo *im_info;
+  MPlist *vars;
 
-  if (! plist)
+  MINPUT__INIT ();
+
+  im_info = get_im_info (language, name, Mnil, Mvariable);
+  if (! im_info || ! im_info->configured_vars)
     return NULL;
-  pl = MPLIST_PLIST (plist);
-  pl = MPLIST_NEXT (pl);
-  if (! MPLIST_MTEXT_P (pl))
-    {
-      M17N_OBJECT_UNREF (plist);
-      return NULL;
-    }
-  M17N_OBJECT_REF (pl);
-  M17N_OBJECT_UNREF (plist);
-  plist = pl;
-  pl = MPLIST_NEXT (pl);  
-  if (MPLIST_MTEXT_P (pl)
-      && mtext_nchars (MPLIST_MTEXT (pl)) > 0)
-    {
-      char *file;
 
-      mt = MPLIST_MTEXT (pl);
-      file = mdatabase__find_file ((char *) MTEXT_DATA (mt));
-      if (file)
-	{
-	  mt = mtext_from_data (file, strlen (file), MTEXT_FORMAT_UTF_8);
-	  mplist_set (pl, Mtext, mt);
-	  M17N_OBJECT_UNREF (mt);
-	}
-      else
-	mt = NULL;
+  M17N_OBJECT_UNREF (im_info->bc_vars);
+  im_info->bc_vars = mplist ();
+  MPLIST_DO (vars, im_info->configured_vars)
+    {
+      MPlist *plist = MPLIST_PLIST (vars);
+      MPlist *elt = mplist ();
+
+      mplist_push (im_info->bc_vars, Mplist, elt);
+      mplist_add (elt, Msymbol, MPLIST_SYMBOL (plist));
+      elt = MPLIST_NEXT (elt);
+      mplist_set (elt, Mplist, mplist_copy (MPLIST_NEXT (plist)));
+      M17N_OBJECT_UNREF (elt);
     }
-  if (! mt)
-    mplist_set (pl, Mnil, NULL);
-  return plist;
+  return im_info->bc_vars;
 }
 
 /*=*/
 
 /***en
-    @brief Get description text of an input method.
+    @brief Set the initial value of an input method variable.
 
-    The minput_get_description () function returns an M-text that
-    describes the input method specified by $LANGUAGE and $NAME.
+    The minput_set_variable () function sets the initial value of
+    input method variable $VARIABLE to $VALUE for the input method
+    specified by $LANGUAGE and $NAME.
+
+    By default, the initial value is 0.
+
+    This setting gets effective in a newly opened input method.
 
     @return
-    If the specified input method has a description text, a pointer to
-    #MText is returned.  A caller have to free it by m17n_object_unref ().
-    If the input method does not have a description text, @c NULL is
-    returned.  */
+    If the operation was successful, 0 is returned.  Otherwise -1 is
+    returned, and #merror_code is set to #MERROR_IM.  */
 /***ja
-    @brief ÆþÎϥ᥽¥Ã¥É¤ÎÀâÌÀ¥Æ¥­¥¹¥È¤òÆÀ¤ë.
+    @brief ÆþÎϥ᥽¥Ã¥ÉÊÑ¿ô¤Î½é´üÃͤòÀßÄꤹ¤ë.
 
-    ´Ø¿ô minput_get_description () ¤Ï¡¢$LANGUAGE ¤È $NAME ¤Ë¤è¤Ã¤Æ»ØÄê
-    ¤µ¤ì¤¿ÆþÎϥ᥽¥Ã¥É¤òÀâÌÀ¤¹¤ë M-text ¤òÊÖ¤¹¡£
+    ´Ø¿ô minput_set_variable () ¤Ï¡¢$LANGUAGE ¤È $NAME 
+    ¤Ë¤è¤Ã¤Æ»ØÄꤵ¤ì¤¿ÆþÎϥ᥽¥Ã¥É¤ÎÆþÎϥ᥽¥Ã¥ÉÊÑ¿ô $VARIABLE
+    ¤Î½é´üÃͤò¡¢ $VALUE ¤ËÀßÄꤹ¤ë¡£
 
-    @return »ØÄꤵ¤ì¤¿ÆþÎϥ᥽¥Ã¥É¤¬ÀâÌÀ¤¹¤ë¥Æ¥­¥¹¥È¤ò»ý¤Ã¤Æ¤¤¤ì¤Ð¡¢
-    #MText ¤Ø¤Î¥Ý¥¤¥ó¥¿¤òÊÖ¤¹¡£¸Æ¤Ó½Ð¤·Â¦¤Ï¡¢¤½¤ì¤ò m17n_object_unref
-    () ¤òÍѤ¤¤Æ²òÊü¤·¤Ê¤¯¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£ÆþÎϥ᥽¥Ã¥É¤ËÀâÌÀ¥Æ¥­¥¹¥È¤¬Ìµ¤±
-    ¤ì¤Ð@c NULL ¤òÊÖ¤¹¡£ */
+    ¥Ç¥Õ¥©¥ë¥È¤Î½é´üÃÍ¤Ï 0 ¤Ç¤¢¤ë¡£
 
-MText *
-minput_get_description (MSymbol language, MSymbol name)
+    ¤³¤ÎÀßÄê¤Ï¡¢¿·¤·¤¯¥ª¡¼¥×¥ó¤µ¤ì¤¿ÆþÎϥ᥽¥Ã¥É¤«¤éÍ­¸ú¤È¤Ê¤ë¡£
+
+    @return
+    ½èÍý¤¬À®¸ù¤¹¤ì¤Ð 0 ¤òÊÖ¤¹¡£¤½¤¦¤Ç¤Ê¤±¤ì¤Ð -1 ¤òÊÖ¤·¡¢
+    #merror_code ¤ò #MERROR_IM ¤ËÀßÄꤹ¤ë¡£  */
+
+int
+minput_set_variable (MSymbol language, MSymbol name,
+		     MSymbol variable, void *value)
 {
-  MPlist *plist = load_partial_im_info (language, name, Mnil, M_description);
-  MPlist *pl;
-  MText *mt;
+  MPlist *plist, *pl;
+  MInputMethodInfo *im_info;
+  int ret;
 
-  if (! plist)
-    return NULL;
-  pl = MPLIST_PLIST (plist);
-  pl = MPLIST_NEXT (pl);
-  if (MPLIST_MTEXT_P (pl))
+  MINPUT__INIT ();
+
+  if (variable == Mnil)
+    MERROR (MERROR_IM, -1);
+  plist = minput_get_variable (language, name, variable);
+  plist = MPLIST_PLIST (plist);
+  plist = MPLIST_NEXT (plist);
+  pl = mplist ();
+  mplist_add (pl, MPLIST_KEY (plist), value);
+  ret = minput_config_variable (language, name, variable, pl);
+  M17N_OBJECT_UNREF (pl);
+  if (ret == 0)
     {
-      mt = MPLIST_MTEXT (pl);
-      M17N_OBJECT_REF (mt);
+      im_info = get_im_info (language, name, Mnil, Mvariable);
+      im_info->tick = 0;
     }
-  M17N_OBJECT_UNREF (plist);
-  return mt;
+  return ret;
 }
 
+/*=*/
+
 /***en
     @brief Get information about input method commands.
 
@@ -3882,11 +5692,11 @@ minput_get_description (MSymbol language, MSymbol name)
 
     There are two kinds of commands, global and local.  Global
     commands are used by multiple input methods for the same purpose,
-    and have global key assignments.  Local commands are used only in
+    and have global key assignments.  Local commands are used only by
     a specific input method, and have only local key assignments.
 
     Each input method may locally change key assignments for global
-    commands.  A global key assignment for a global command are
+    commands.  The global key assignment for a global command is
     effective only when the current input method does not have local
     key assignments for that command.
 
@@ -3964,13 +5774,35 @@ minput_get_description (MSymbol language, MSymbol name)
 MPlist *
 minput_get_commands (MSymbol language, MSymbol name)
 {
-  MPlist *plist = get_nested_list (language, name, Mnil, M_command);
+  MInputMethodInfo *im_info;
+  MPlist *cmds;
+
+  MINPUT__INIT ();
 
-  return (MPLIST_TAIL_P (plist) ? NULL : plist);
+  im_info = get_im_info (language, name, Mnil, Mcommand);
+  if (! im_info || ! im_info->configured_vars)
+    return NULL;
+  M17N_OBJECT_UNREF (im_info->bc_cmds);
+  im_info->bc_cmds = mplist ();
+  MPLIST_DO (cmds, im_info->configured_cmds)
+    {
+      MPlist *plist = MPLIST_PLIST (cmds);
+      MPlist *elt = mplist ();
+
+      mplist_push (im_info->bc_cmds, Mplist, elt);
+      mplist_add (elt, MPLIST_SYMBOL (plist),
+		  mplist_copy (MPLIST_NEXT (plist)));
+      M17N_OBJECT_UNREF (elt);
+    }
+  return im_info->bc_cmds;
 }
 
+/*=*/
+
 /***en
-    @brief Assign a key sequence to an input method command.
+    @brief Assign a key sequence to an input method command (obsolete).
+
+    This function is obsolete.  Use minput_config_command () instead.
 
     The minput_assign_command_keys () function assigns input key
     sequence $KEYSEQ to input method command $COMMAND for the input
@@ -4014,284 +5846,30 @@ int
 minput_assign_command_keys (MSymbol language, MSymbol name,
 			    MSymbol command, MPlist *keyseq)
 {
-  MPlist *plist, *pl, *p;
-
-  if (check_command_keyseq (keyseq) < 0
-      || ! (plist = get_nested_list (language, name, Mnil, M_command)))
-    MERROR (MERROR_IM, -1);
-  pl = mplist_get (plist, command);
-  if (pl)
-    {
-      pl = MPLIST_NEXT (pl);
-      if (! keyseq)
-	while ((p = mplist_pop (pl)))
-	  M17N_OBJECT_UNREF (p);
-      else
-	{
-	  keyseq = mplist_copy (keyseq);
-	  mplist_push (pl, Mplist, keyseq);
-	  M17N_OBJECT_UNREF (keyseq);
-	}
-    }
-  else
-    {
-      if (name == Mnil)
-	MERROR (MERROR_IM, -1);
-      if (! keyseq)
-	return 0;
-      /* Get global commands.  */
-      pl = get_nested_list (Mnil, Mnil, Mnil, M_command);
-      pl = mplist_get (pl, command);
-      if (! pl)
-	MERROR (MERROR_IM, -1);
-      p = mplist ();
-      mplist_add (p, Mtext, mplist_value (pl));
-      keyseq = mplist_copy (keyseq);
-      mplist_add (p, Mplist, keyseq);
-      M17N_OBJECT_UNREF (keyseq);
-      mplist_push (plist, command, p);
-    }
-  return 0;
-}
-
-/***en
-    @brief Get a list of variables of an input method.
-
-    The minput_get_variables () function returns a plist (#MPlist) of
-    variables used to control the behavior of the input method
-    specified by $LANGUAGE and $NAME.  The key of an element of the
-    plist is a symbol representing a variable, and the value is a
-    plist of the form VAR-INFO (described below) that carries the
-    information about the variable.
-
-    The first element of VAR-INFO has the key #Mtext or #Msymbol.  If
-    the key is #Mtext, the value is an M-text describing the variable.
-    If the key is #Msymbol, that value is #Mnil which means the
-    variable has no description text.
-
-    The second element of VAR-INFO is for the value of the variable.
-    The key is #Minteger, #Msymbol, or #Mtext, and the value is an
-    integer, a symbol, or an M-text, respectively.  The variable is
-    set to this value when an input context is created for the input
-    method.
-
-    If there are no more elements, the variable can take any value
-    that matches with the above type.  Otherwise, the remaining
-    elements of VAR-INFO are to specify valid values of the variable.
-
-    If the type of the variable is integer, the following elements
-    have the key #Minteger or #Mplist.  If it is #Minteger, the value
-    is a valid integer value.  If it is #Mplist, the value is a plist
-    of two of elements.  Both of them have the key #Minteger, and
-    values are the minimum and maximum bounds of the valid value
-    range.
-
-    If the type of the variable is symbol or M-text, the following
-    elements of the plist have the key #Msymbol or #Mtext,
-    respectively, and the value must be a valid one.
-
-    For instance, suppose an input method has the variables:
-
-    @li name:intvar, description:"value is an integer",
-         initial value:0, value-range:0..3,10,20
-
-    @li name:symvar, description:"value is a symbol",
-         initial value:nil, value-range:a, b, c, nil
-
-    @li name:txtvar, description:"value is an M-text",
-         initial value:empty text, no value-range (i.e. any text)
-
-    Then, the returned plist has this form ('X:Y' means X is a key and Y is
-    a value, and '(...)' means a plist):
-
-@verbatim
-    plist:(intvar:(mtext:"value is an integer"
-                   integer:0
-		   plist:(integer:0 integer:3)
-                   integer:10
-                   integer:20))
-           symvar:(mtext:"value is a symbol"
-                   symbol:nil
-                   symbol:a
-                   symbol:b
-                   symbol:c
-                   symbol:nil))
-           txtvar:(mtext:"value is an M-text"
-                   mtext:""))
-@endverbatim
-
-    @return
-    If the input method uses any variables, a pointer to #MPlist is
-    returned.  As the plist is kept in the library, a caller must not
-    modify nor free it.  If the input method does not use any
-    variable, @c NULL is returned.  */
-/***ja
-    @brief ÆþÎϥ᥽¥Ã¥É¤ÎÊÑ¿ô¥ê¥¹¥È¤òÆÀ¤ë.
-
-    ´Ø¿ô minput_get_variables () ¤Ï¡¢$LANGUAGE ¤È $NAME 
-    ¤Ë¤è¤Ã¤Æ»ØÄꤵ¤ì¤¿ÆþÎϥ᥽¥Ã¥É¤Î¿¶¤ëÉñ¤¤¤òÀ©¸æ¤¹¤ëÊÑ¿ô¤Î¥×¥í¥Ñ¥Æ¥£¥ê¥¹¥È 
-    (#MPlist) ¤òÊÖ¤¹¡£¥ê¥¹¥È¤Î³ÆÍ×ÁǤΥ­¡¼¤ÏÊÑ¿ô¤òɽ¤¹¥·¥ó¥Ü¥ë¤Ç¤¢¤ë¡£
-    ³ÆÍ×ÁǤÎÃͤϲ¼µ­¤Î VAR-INFO 
-    ¤Î·Á¼°¤Î¥×¥í¥Ñ¥Æ¥£¥ê¥¹¥È¤Ç¤¢¤ê¡¢³ÆÊÑ¿ô¤Ë´Ø¤¹¤ë¾ðÊó¤ò¼¨¤·¤Æ¤¤¤ë¡£
-
-    VAR-INFO ¤ÎÂè°ìÍ×ÁǤΥ­¡¼¤Ï #Mtext ¤Þ¤¿¤Ï #Msymbol ¤Ç¤¢¤ë¡£¥­¡¼¤¬
-    #Mtext ¤Ê¤é¡¢ÃͤϤ½¤ÎÊÑ¿ô¤òÀâÌÀ¤¹¤ë M-text ¤Ç¤¢¤ë¡£¥­¡¼¤¬ #Msymbol
-    ¤Ê¤éÃÍ¤Ï #Mnil ¤Ç¤¢¤ê¡¢¤³¤ÎÊÑ¿ô¤ÏÀâÌÀ¥Æ¥­¥¹¥È¤ò»ý¤¿¤Ê¤¤¤³¤È¤Ë¤Ê¤ë¡£
-
-    VAR-INFO ¤ÎÂèÆóÍ×ÁǤÏÊÑ¿ô¤ÎÃͤò¼¨¤¹¡£¥­¡¼¤Ï #Minteger, #Msymbol,
-    #Mtext ¤Î¤¤¤º¤ì¤«¤Ç¤¢¤ê¡¢ÃͤϤ½¤ì¤¾¤ìÀ°¿ôÃÍ¡¢¥·¥ó¥Ü¥ë¡¢M-text  ¤Ç¤¢¤ë¡£
-    ¤³¤ÎÆþÎϥ᥽¥Ã¥ÉÍѤÎÆþÎÏ¥³¥ó¥Æ¥¹¥È¤¬ºî¤é¤ì¤ë»þÅÀ¤Ç¤Ï¡¢ÊÑ¿ô¤Ï¤³¤ÎÃͤËÀßÄꤵ¤ì¤Æ¤¤¤ë¡£
-
-    VAR-INFO ¤Ë¤½¤ì°Ê³°¤ÎÍ×ÁǤ¬Ìµ¤±¤ì¤Ð¡¢ÊÑ¿ô¤Ï¾åµ­¤Î·¿¤Ë¹çÃפ¹¤ë¸Â¤ê¤É¤Î¤è¤¦¤ÊÃͤò¤È¤ë¤³¤È¤â¤Ç¤­¤ë¡£
-    ¤½¤¦¤Ç¤Ê¤±¤ì¤Ð¡¢VAR-INFO ¤Î»Ä¤ê¤ÎÍ×ÁǤˤè¤Ã¤ÆÊÑ¿ô¤ÎÍ­¸ú¤ÊÃͤ¬»ØÄꤵ¤ì¤ë¡£
-
-    ÊÑ¿ô¤Î·¿¤¬À°¿ô¤Ç¤¢¤ì¤Ð¡¢¤½¤ì°Ê¹ß¤ÎÍ×ÁÇ¤Ï #Minteger ¤« #Mplist 
-    ¤ò¥­¡¼¤È¤·¤Æ»ý¤Ä¡£ #Minteger ¤Ç¤¢¤ì¤Ð¡¢ÃͤÏÍ­¸ú¤ÊÃͤò¼¨¤¹À°¿ôÃͤǤ¢¤ë¡£
-    #Mplist ¤Ç¤¢¤ì¤Ð¡¢ÃͤÏÆó¤Ä¤ÎÍ×ÁǤò»ý¤Ä¥×¥í¥Ñ¥Æ¥£¥ê¥¹¥È¤Ç¤¢¤ê¡¢³ÆÍ×ÁǤϥ­¡¼¤È¤·¤Æ
-    #Minteger ¤ò¡¢ÃͤȤ·¤Æ¤½¤ì¤¾¤ìÍ­¸ú¤ÊÃͤξå¸ÂÃͤȲ¼¸ÂÃͤò¤È¤ë¡£
-
-    ÊÑ¿ô¤Î·¿¤¬¥·¥ó¥Ü¥ë¤« M-text ¤Ç¤¢¤ì¤Ð¡¢¤½¤ì°Ê¹ß¤ÎÍ×ÁǤϥ­¡¼¤È¤·¤Æ¤½¤ì¤¾¤ì
-    #Msymbol ¤« #Mtext ¤ò»ý¤Á¡¢ÃͤϤ½¤Î·¿¤Ë¹çÃפ¹¤ë¤â¤Î¤Ç¤¢¤ë¡£
-
-    Îã¤È¤·¤Æ¡¢¤¢¤ëÆþÎϥ᥽¥Ã¥É¤¬¼¡¤Î¤è¤¦¤ÊÊÑ¿ô¤ò»ý¤Ä¾ì¹ç¤ò¹Í¤¨¤è¤¦¡£
-
-    @li name:intvar, ÀâÌÀ:"value is an integer",
-        ½é´üÃÍ:0, ÃͤÎÈÏ°Ï:0..3,10,20
-
-    @li name:symvar, ÀâÌÀ:"value is a symbol",
-         ½é´üÃÍ:nil, ÃͤÎÈÏ°Ï:a, b, c, nil
-
-    @li name:txtvar, ÀâÌÀ:"value is an M-text",
-        ½é´üÃÍ:empty text, ÃͤÎÈϰϤʤ·(¤É¤ó¤Ê M-text ¤Ç¤â²Ä)
-
-    ¤³¤Î¾ì¹ç¡¢ÊÖ¤µ¤ì¤ë¥ê¥¹¥È¤Ï°Ê²¼¤Î¤è¤¦¤Ë¤Ê¤ë¡£¡Ê'X:Y' ¤È¤¤¤¦µ­Ë¡¤Ï X 
-    ¤¬¥­¡¼¤Ç Y ¤¬ÃͤǤ¢¤ë¤³¤È¤ò¡¢¤Þ¤¿ '(...)' ¤Ï¥×¥í¥Ñ¥Æ¥£¥ê¥¹¥È¤ò¼¨¤¹¡£¡Ë
-
-@verbatim
-    plist:(intvar:(mtext:"value is an integer"
-                   integer:0
-		   plist:(integer:0 integer:3)
-                   integer:10
-                   integer:20))
-           symvar:(mtext:"value is a symbol"
-                   symbol:nil
-                   symbol:a
-                   symbol:b
-                   symbol:c
-                   symbol:nil))
-           txtvar:(mtext:"value is an M-text"
-                   mtext:""))
-@endverbatim
-
-    @return 
-    ÆþÎϥ᥽¥Ã¥É¤¬²¿¤é¤«¤ÎÊÑ¿ô¤ò»ÈÍѤ·¤Æ¤¤¤ì¤Ð #MPlist ¤Ø¤ÎÊÑ¿ô¤òÊÖ¤¹¡£
-    ÊÖ¤µ¤ì¤ë¥×¥í¥Ñ¥Æ¥£¥ê¥¹¥È¤Ï¥é¥¤¥Ö¥é¥ê¤Ë¤è¤Ã¤Æ´ÉÍý¤µ¤ì¤Æ¤ª¤ê¡¢¸Æ¤Ó½Ð¤·Â¦¤ÇÊѹ¹¤·¤¿¤ê²òÊü¤·¤¿¤ê¤·¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£
-    ÆþÎϥ᥽¥Ã¥É¤¬ÊÑ¿ô¤ò°ìÀÚ»ÈÍѤ·¤Æ¤Ê¤±¤ì¤Ð¡¢@c NULL ¤òÊÖ¤¹¡£  */
-
-MPlist *
-minput_get_variables (MSymbol language, MSymbol name)
-{
-  MPlist *plist = get_nested_list (language, name, Mnil, M_variable);
-
-  return (MPLIST_TAIL_P (plist) ? NULL : plist);
-}
-
-/***en
-    @brief Set the initial value of an input method variable.
-
-    The minput_set_variable () function sets the initial value of
-    input method variable $VARIABLE to $VALUE for the input method
-    specified by $LANGUAGE and $NAME.
-
-    By default, the initial value is 0.
-
-    This setting gets effective in a newly opened input method.
-
-    @return
-    If the operation was successful, 0 is returned.  Otherwise -1 is
-    returned, and #merror_code is set to #MERROR_IM.  */
-/***ja
-    @brief ÆþÎϥ᥽¥Ã¥ÉÊÑ¿ô¤Î½é´üÃͤòÀßÄꤹ¤ë.
-
-    ´Ø¿ô minput_set_variable () ¤Ï¡¢$LANGUAGE ¤È $NAME 
-    ¤Ë¤è¤Ã¤Æ»ØÄꤵ¤ì¤¿ÆþÎϥ᥽¥Ã¥É¤ÎÆþÎϥ᥽¥Ã¥ÉÊÑ¿ô $VARIABLE
-    ¤Î½é´üÃͤò¡¢ $VALUE ¤ËÀßÄꤹ¤ë¡£
-
-    ¥Ç¥Õ¥©¥ë¥È¤Î½é´üÃÍ¤Ï 0 ¤Ç¤¢¤ë¡£
-
-    ¤³¤ÎÀßÄê¤Ï¡¢¿·¤·¤¯¥ª¡¼¥×¥ó¤µ¤ì¤¿ÆþÎϥ᥽¥Ã¥É¤«¤éÍ­¸ú¤È¤Ê¤ë¡£
-
-    @return
-    ½èÍý¤¬À®¸ù¤¹¤ì¤Ð 0 ¤òÊÖ¤¹¡£¤½¤¦¤Ç¤Ê¤±¤ì¤Ð -1 ¤òÊÖ¤·¡¢
-    #merror_code ¤ò #MERROR_IM ¤ËÀßÄꤹ¤ë¡£  */
+  int ret;
 
-int
-minput_set_variable (MSymbol language, MSymbol name,
-		     MSymbol variable, void *value)
-{
-  MPlist *plist, *val_element, *range_element;
-  MSymbol type;
+  MINPUT__INIT ();
 
-  plist = get_nested_list (language, name, Mnil, M_variable);
-  if (! plist)
-    MERROR (MERROR_IM, -1);
-  plist = mplist_find_by_value (plist, variable);
-  if (! plist)
+  if (command == Mnil)
     MERROR (MERROR_IM, -1);
-  plist = MPLIST_PLIST (MPLIST_NEXT (plist));
-  val_element = MPLIST_NEXT (plist);
-  type = MPLIST_KEY (val_element);
-  range_element = MPLIST_NEXT (val_element);
-    
-  if (! MPLIST_TAIL_P (range_element))
+  if (keyseq)
     {
-      if (type == Minteger)
-	{
-	  int val = (int) value, this_val;
-      
-	  MPLIST_DO (plist, range_element)
-	    {
-	      this_val = (int) MPLIST_VAL (plist);
-	      if (MPLIST_PLIST_P (plist))
-		{
-		  int min_bound, max_bound;
-		  MPlist *pl = MPLIST_PLIST (plist);
-
-		  min_bound = (int) MPLIST_VAL (pl);
-		  pl = MPLIST_NEXT (pl);
-		  max_bound = (int) MPLIST_VAL (pl);
-		  if (val >= min_bound && val <= max_bound)
-		    break;
-		}
-	      else if (val == this_val)
-		break;
-	    }
-	  if (MPLIST_TAIL_P (plist))
-	    MERROR (MERROR_IM, -1);
-	}
-      else if (type == Msymbol)
-	{
-	  MPLIST_DO (plist, range_element)
-	    if (MPLIST_SYMBOL (plist) == (MSymbol) value)
-	      break;
-	  if (MPLIST_TAIL_P (plist))
-	    MERROR (MERROR_IM, -1);
-	}
-      else			/* type == Mtext */
-	{
-	  MPLIST_DO (plist, range_element)
-	    if (mtext_cmp (MPLIST_MTEXT (plist), (MText *) value) == 0)
-	      break;
-	  if (MPLIST_TAIL_P (plist))
-	    MERROR (MERROR_IM, -1);
-	  M17N_OBJECT_REF (value);
-	}
-    }
+      MPlist *plist;
 
-  mplist_set (val_element, type, value);
-  return 0;
+      if  (! check_command_keyseq (keyseq))
+	MERROR (MERROR_IM, -1);
+      plist = mplist ();
+      mplist_add (plist, Mplist, keyseq);
+      keyseq = plist;
+    }  
+  else
+    keyseq = mplist ();
+  ret = minput_config_command (language, name, command, keyseq);
+  M17N_OBJECT_UNREF (keyseq);
+  return ret;
 }
 
+/*** @} */ 
 /*** @} */
 /*=*/
 /*** @addtogroup m17nDebug */