(device_init): Set xft_driver.list.

[m17n/m17n-lib.git] / src / m17n-X.c

/* m17n-X.c -- implementation of the GUI API on X Windows.
   Copyright (C) 2003, 2004
     National Institute of Advanced Industrial Science and Technology (AIST)
     Registration Number H15PRO112

   This file is part of the m17n library.

   The m17n library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public License
   as published by the Free Software Foundation; either version 2.1 of
   the License, or (at your option) any later version.

   The m17n library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the m17n library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307, USA.  */

#if !defined (FOR_DOXYGEN) || defined (DOXYGEN_INTERNAL_MODULE)
/*** @addtogroup m17nInternal
     @{ */

#include "config.h"

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <locale.h>

#include <X11/Xlib.h>
#include <X11/keysym.h>
#include <X11/Xlocale.h>
#include <X11/Xutil.h>
#include <X11/Xresource.h>
#include <X11/Xatom.h>
#include <X11/StringDefs.h>
#include <X11/Intrinsic.h>

#ifdef HAVE_XFT2
#include <X11/Xft/Xft.h>
#endif  /* HAVE_XFT2 */

#include "m17n-gui.h"
#include "m17n-X.h"
#include "m17n-misc.h"
#include "internal.h"
#include "internal-gui.h"
#include "symbol.h"
#include "input.h"
#include "font.h"
#include "fontset.h"
#include "face.h"

typedef struct {
  MFont core;
  unsigned int sizes[2];
} MXFont;

#define SET_SIZE(xfont, s) ((xfont)->sizes[(s) / 32] |= (1 << ((s) & 0x1F)))
#define HAVE_SIZE(xfont, s) ((xfont)->sizes[(s) / 32] & (1 << ((s) & 0x1F)))

typedef struct {
  int size, inc, used;
  MXFont *fonts;
} MXFontList;

typedef struct
{
  /* Common header for the m17n object.  */
  M17NObject control;

  Display *display;

  /* If nonzero, <display> is opened by this library.  Thus it should
     be closed on freeing this structure.  */
  int auto_display;

  /** List of available X-core fonts on the display.  Keys are
      registries and values are plists whose keys are families and
      values are pointers to MXFontList.  */
  MPlist *font_list;

  /** List of available X-core fonts on the display.  Keys are
      families and values are pointers to MFont.  For each MFont, only
      these properties are important; FOUNDRY, FAMILY, REGISTRY.  */
  MPlist *base_font_list;

 /** Modifier bit masks of the display.  */
  int meta_mask;
  int alt_mask;
  int super_mask;
  int hyper_mask;
} MDisplayInfo;

/* Anchor of the chain of MDisplayInfo objects.  */
static MPlist *display_info_list;


/* Color value and the corresponding GC.  */
typedef struct
{
  unsigned int rgb;            /* (red << 16) | (green << 8) | blue */
  GC gc;
} RGB_GC;

enum gc_index
  {
    GC_INVERSE,
    GC_NORMAL = GC_INVERSE + 7,
    GC_HLINE,
    GC_BOX_TOP,
    GC_BOX_BOTTOM,
    GC_BOX_LEFT,
    GC_BOX_RIGHT,
    GC_MAX
  };

typedef struct
{
  int rgb_fore;
  int rgb_back;
  /* The first 8 elements are indexed by an intensity for
     anti-aliasing.  The 2nd to 7th are created on demand.  */
  GC gc[GC_MAX];
#ifdef HAVE_XFT2
  XftColor xft_color_fore, xft_color_back;
#endif
} GCInfo;

typedef struct
{
  /* Common header for the m17n object.  */
  M17NObject control;

  MDisplayInfo *display_info;

  int screen_num;

  Drawable drawable;

  unsigned depth;

  Colormap cmap;

  GC scratch_gc;

#ifdef HAVE_XFT2
  XftDraw *xft_draw;
#endif

  /** List of pointers to realized faces on the frame.  */
  MPlist *realized_face_list;

  /* List of information about each font.  Keys are font registries,
     values are (MFontInfo *).  */
  MPlist *realized_font_list;

  /** List of pointers to realized fontsets on the frame.  */
  MPlist *realized_fontset_list;

  /** List of XColors vs GCs on the frame.  */
  MPlist *gc_list;
} MWDevice;

static MPlist *device_list;

static MSymbol M_iso8859_1, M_iso10646_1;

#define FRAME_DEVICE(frame) ((MWDevice *) (frame)->device)
#define FRAME_DISPLAY(frame) (FRAME_DEVICE (frame)->display_info->display)
#define FRAME_SCREEN(frame) (FRAME_DEVICE (frame)->screen_num)
#define FRAME_CMAP(frame) (FRAME_DEVICE (frame)->cmap)
#define FRAME_VISUAL(frame) DefaultVisual (FRAME_DISPLAY (frame), \
                                           FRAME_SCREEN (frame))

#define DEFAULT_FONT "-misc-fixed-medium-r-normal--*-120-*-*-*-*-iso8859-1"
#define FALLBACK_FONT "-misc-fixed-medium-r-semicondensed--13-120-75-75-c-60-iso8859-1"

typedef struct
{
  String font;
  String foreground;
  String background;
  Boolean reverse_video;
} AppData, *AppDataPtr;

static void
free_display_info (void *object)
{
  MDisplayInfo *disp_info = (MDisplayInfo *) object;
  MPlist *plist, *p;

  MPLIST_DO (plist, disp_info->font_list)
    {
      MPLIST_DO (p, MPLIST_VAL (plist))
        free (MPLIST_VAL (p));
      M17N_OBJECT_UNREF (MPLIST_VAL (plist));
    }
  M17N_OBJECT_UNREF (disp_info->font_list);
  MPLIST_DO (plist, disp_info->base_font_list)
    free (MPLIST_VAL (plist));
  M17N_OBJECT_UNREF (disp_info->base_font_list);

  if (disp_info->auto_display)
    XCloseDisplay (disp_info->display);

  free (object);
}

static void
free_device (void *object)
{
  MWDevice *device = object;
  MPlist *plist;

  for (plist = device->realized_fontset_list;
       mplist_key (plist) != Mnil; plist = mplist_next (plist))
    mfont__free_realized_fontset ((MRealizedFontset *) mplist_value (plist));
  M17N_OBJECT_UNREF (device->realized_fontset_list);

  MPLIST_DO (plist, device->realized_font_list)
    mfont__free_realized ((MRealizedFont *) MPLIST_VAL (plist));
  M17N_OBJECT_UNREF (device->realized_font_list);

  MPLIST_DO (plist, device->realized_face_list)
    {
      MRealizedFace *rface = MPLIST_VAL (plist);

      free (rface->info);
      mface__free_realized (rface);
    }
  M17N_OBJECT_UNREF (device->realized_face_list);

  MPLIST_DO (plist, device->gc_list)
    {
      XFreeGC (device->display_info->display,
               ((RGB_GC *) MPLIST_VAL (plist))->gc);
      free (MPLIST_VAL (plist));
    }
  M17N_OBJECT_UNREF (device->gc_list);
  XFreeGC (device->display_info->display, device->scratch_gc);

#ifdef HAVE_XFT2
  XftDrawDestroy (device->xft_draw);
#endif

  XFreePixmap (device->display_info->display, device->drawable);
  M17N_OBJECT_UNREF (device->display_info);
  free (object);
}


static void
find_modifier_bits (MDisplayInfo *disp_info)
{
  Display *display = disp_info->display;
  XModifierKeymap *mods;
  KeyCode meta_l = XKeysymToKeycode (display, XK_Meta_L);
  KeyCode meta_r = XKeysymToKeycode (display, XK_Meta_R);
  KeyCode alt_l = XKeysymToKeycode (display, XK_Alt_L);
  KeyCode alt_r = XKeysymToKeycode (display, XK_Alt_R);
  KeyCode super_l = XKeysymToKeycode (display, XK_Super_L);
  KeyCode super_r = XKeysymToKeycode (display, XK_Super_R);
  KeyCode hyper_l = XKeysymToKeycode (display, XK_Hyper_L);
  KeyCode hyper_r = XKeysymToKeycode (display, XK_Hyper_R);
  int i, j;

  mods = XGetModifierMapping (display);
  /* We skip the first three sets for Shift, Lock, and Control.  The
     remaining sets are for Mod1, Mod2, Mod3, Mod4, and Mod5.  */
  for (i = 3; i < 8; i++)
    for (j = 0; j < mods->max_keypermod; j++)
      {
        KeyCode code = mods->modifiermap[i * mods->max_keypermod + j];

        if (! code)
          continue;
        if (code == meta_l || code == meta_r)
          disp_info->meta_mask |= (1 << i);
        else if (code == alt_l || code == alt_r)
          disp_info->alt_mask |= (1 << i);
        else if (code == super_l || code == super_r)
          disp_info->super_mask |= (1 << i);
        else if (code == hyper_l || code == hyper_r)
          disp_info->hyper_mask |= (1 << i);
      }

  /* If meta keys are not in any modifier, use alt keys as meta
     keys.  */
  if (! disp_info->meta_mask)
    {
      disp_info->meta_mask = disp_info->alt_mask;
      disp_info->alt_mask = 0;
    }
  /* If both meta and alt are assigned to the same modifier, give meta
     keys priority.  */
  if (disp_info->meta_mask & disp_info->alt_mask)
    disp_info->alt_mask &= ~disp_info->meta_mask;

  XFreeModifiermap (mods);
}

static RGB_GC *
get_rgb_gc (MWDevice *device, XColor *xcolor)
{
  int rgb = (((xcolor->red >> 8) << 16) | ((xcolor->green >> 8) << 8)
             | (xcolor->blue >> 8));
  MPlist *plist;
  RGB_GC *rgb_gc;
  unsigned long valuemask = GCForeground;
  XGCValues values;

  MPLIST_DO (plist, device->gc_list)
    {
      rgb_gc = MPLIST_VAL (plist);

      if (rgb_gc->rgb == rgb)
        return rgb_gc;
      if (rgb_gc->rgb > rgb)
        break;
    }

  if (! XAllocColor (device->display_info->display, device->cmap, xcolor))
    return NULL;

  rgb_gc = malloc (sizeof (RGB_GC));
  rgb_gc->rgb = rgb;
  values.foreground = xcolor->pixel;
  rgb_gc->gc = XCreateGC (device->display_info->display,
                          device->drawable, valuemask, &values);
  mplist_push (plist, Mt, rgb_gc);
  return rgb_gc;
}

static GC
get_gc (MFrame *frame, MSymbol color, int for_foreground, int *rgb_ret)
{
  MWDevice *device = FRAME_DEVICE (frame);
  XColor xcolor;
  RGB_GC *rgb_gc;

  if (color == Mnil)
    {
      if (frame->rface)
        goto no_color;
      color = for_foreground ? frame->foreground : frame->background;
    }
  if (! XParseColor (FRAME_DISPLAY (frame), device->cmap,
                     msymbol_name (color), &xcolor))
    goto no_color;
  rgb_gc = get_rgb_gc (device, &xcolor);
  if (! rgb_gc)
    goto no_color;
  if (rgb_ret)
    *rgb_ret = rgb_gc->rgb;
  return rgb_gc->gc;

 no_color:
  {
    GCInfo *info = frame->rface->info;
    GC gc;
    int rgb;

    if (for_foreground)
      rgb = info->rgb_fore, gc = info->gc[GC_NORMAL];
    else
      rgb = info->rgb_back, gc = info->gc[GC_INVERSE];
    if (rgb_ret)
      *rgb_ret = rgb;
    return gc;
  }
}

static GC
get_gc_for_anti_alias (MWDevice *device, GCInfo *info, int intensity)
{
  int rgb_fore, rgb_back;
  XColor xcolor;
  RGB_GC *rgb_gc;
  GC gc;

  if (info->gc[intensity])
    return info->gc[intensity];

  rgb_fore = info->rgb_fore, rgb_back = info->rgb_back;
  xcolor.red = ((((rgb_fore & 0xFF0000) >> 16) * intensity
                 + ((rgb_back & 0xFF0000) >> 16) * (7 - intensity)) / 7) << 8;
  xcolor.green = ((((rgb_fore & 0xFF00) >> 8) * intensity
                   + ((rgb_back & 0xFF00) >> 8) * (7 - intensity)) / 7) << 8;
  xcolor.blue = (((rgb_fore & 0xFF) * intensity
                  + (rgb_back & 0xFF) * (7 - intensity)) / 7) << 8;
  rgb_gc = get_rgb_gc (device, &xcolor);
  if (rgb_gc)
    gc = rgb_gc->gc;
  else
    gc =get_gc_for_anti_alias (device, info,
                               intensity < 4 ? intensity - 1 : intensity + 1);
  return (info->gc[intensity] = gc);
}

static GC
set_region (MFrame *frame, GC gc, MDrawRegion region)
{
  unsigned long valuemask = GCForeground;

  XCopyGC (FRAME_DISPLAY (frame), gc, valuemask,
           FRAME_DEVICE (frame)->scratch_gc);
  XSetRegion (FRAME_DISPLAY (frame), FRAME_DEVICE (frame)->scratch_gc, region);
  return FRAME_DEVICE (frame)->scratch_gc;
}

\f
/** X font handler */

static MRealizedFont *xfont_select (MFrame *, MFont *, MFont *, int);
static int xfont_open (MRealizedFont *);
static void xfont_find_metric (MRealizedFont *, MGlyphString *, int, int);
static unsigned xfont_encode_char (MRealizedFont *, unsigned);
static void xfont_render (MDrawWindow, int, int, MGlyphString *,
                          MGlyph *, MGlyph *, int, MDrawRegion);
static void xfont_list (MFrame *frame, MPlist *plist,
                        MFont *font, MSymbol language);


static MFontDriver xfont_driver =
  { xfont_select, xfont_open,
    xfont_find_metric, xfont_encode_char, xfont_render, xfont_list };

static int
font_compare (const void *p1, const void *p2)
{
  return strcmp (*(char **) p1, *(char **) p2);
}

static MPlist *
xfont_registry_list (MDisplayInfo *disp_info, MSymbol registry)
{
  MPlist *font_list = disp_info->font_list;
  MPlist *base_font_list = disp_info->base_font_list;
  MPlist *plist = mplist (), *p;
  char pattern[1024];
  char **font_names, **names;
  int nfonts;
  int i, j;
  MXFont font;
  MXFontList *xfont_table;
  MFont *bfont = NULL;

  mplist_add (font_list, registry, plist);
  sprintf (pattern, "-*-*-*-*-*-*-*-*-*-*-*-*-%s", msymbol_name (registry));
  font_names = XListFonts (disp_info->display, pattern, 0x8000, &nfonts);
  if (nfonts == 0)
    return plist;
  names = alloca (sizeof (char *) * nfonts);
  memcpy (names, font_names, sizeof (char *) * nfonts);
  qsort (names, nfonts, sizeof (char *), font_compare);
  for (i = 0, p = NULL; i < nfonts; i++)
    if (mfont__parse_name_into_font (names[i], Mx, (MFont *) &font) == 0
        && (font.core.property[MFONT_SIZE] > 0
            || font.core.property[MFONT_RESY] == 0))
      {
        MSymbol family = FONT_PROPERTY ((MFont *) &font, MFONT_FAMILY);
        int size = font.core.property[MFONT_SIZE] / 10;
        char *base_end;
        int base_len;
        int fields;
        
        font.sizes[0] = font.sizes[1] = 0;
        SET_SIZE (&font, size);
            
        /* Handle fonts of the same base.  */
        for (base_end = names[i], fields = 0; *base_end; base_end++)
          if (*base_end == '-'
              && ++fields == 7  /* PIXEL_SIZE */)
            break;
        base_len = base_end - names[i];
        for (j = i + 1; j < nfonts && ! strncmp (names[i], names[j], base_len);
             i = j++)
          if (mfont__parse_name_into_font (names[j], Mx, (MFont *) &font) == 0
              && (font.core.property[MFONT_SIZE] > 0
                  || font.core.property[MFONT_RESY] == 0))
            {
              size = font.core.property[MFONT_SIZE] / 10;
              SET_SIZE (&font, size);
            }

        if (p && MPLIST_KEY (p) != family)
          p = mplist_find_by_key (plist, family);
        if (p)
          xfont_table = MPLIST_VAL (p);
        else
          {
            p = plist;
            MSTRUCT_MALLOC (xfont_table, MERROR_WIN);
            MLIST_INIT1 (xfont_table, fonts, 4);
            mplist_push (p, family, xfont_table);
          }
        MLIST_APPEND1 (xfont_table, fonts, font, MERROR_WIN);
        if (! bfont
            || (font.core.property[MFONT_FOUNDRY]
                != bfont->property[MFONT_FOUNDRY])
            || (font.core.property[MFONT_FAMILY]
                != bfont->property[MFONT_FAMILY]))
          {
            MSTRUCT_MALLOC (bfont, MERROR_WIN);
            *bfont = font.core;
            for (j = MFONT_WEIGHT; j <= MFONT_ADSTYLE; j++)
              bfont->property[j] = 0;
            bfont->property[MFONT_SIZE] = bfont->property[MFONT_RESY] = 0;
            mplist_push (base_font_list, family, bfont);
          }
      }
  XFreeFontNames (font_names);
  return plist;
}

typedef struct
{
  M17NObject control;
  Display *display;
  XFontStruct *xfont;
} MXFontInfo;

/* The X font driver function SELECT.  */

static MRealizedFont *
xfont_select (MFrame *frame, MFont *spec, MFont *request, int limited_size){

  MDisplayInfo *disp_info = FRAME_DEVICE (frame)->display_info;
  MSymbol family = FONT_PROPERTY (spec, MFONT_FAMILY);
  MSymbol registry = FONT_PROPERTY (spec, MFONT_REGISTRY);
  int requested_size = request->property[MFONT_SIZE];
  MRealizedFont *rfont;
  MPlist *plist;
  int i;
  MFont *best_font;
  int best_score, score;

  if (registry == Mnil
      || ! strchr (MSYMBOL_NAME (registry), '-'))
    return NULL;

  plist = mplist_get (disp_info->font_list, registry);
  if (! plist
      && ! (plist = xfont_registry_list (disp_info, registry)))
    return NULL;
  best_score = -1, best_font = NULL;
  if (family == Mnil)
    family = FONT_PROPERTY (request, MFONT_FAMILY);
  MPLIST_DO (plist, plist)
    {
      if (family == Mnil || family == MPLIST_KEY (plist))
        {
          MXFontList *xfont_table = MPLIST_VAL (plist);

          for (i = 0; i < xfont_table->used; i++)
            {
              MXFont *xfont = xfont_table->fonts + i;
              MFont *font = (MFont *) xfont;
              int size = requested_size / 10, s0, s1;
              
              for (s0 = size; s0 > 0 && ! HAVE_SIZE (xfont, s0); s0--);
              if (s0 * 10 == requested_size)
                /* Exact size match.  */
                ;
              else if (xfont->sizes[0] & 1)
                /* Scalable font.  */
                size = 0;
              else if (limited_size)
                /* We can't use a larger font.  */
                continue;
              else if (s0 == 0)
                {
                  for (s0 = size + 1; s0 < 64 && ! HAVE_SIZE (xfont, s0); s0++);
                  if (s0 == 64)
                    continue;
                  size = s0;
                }
              else
                {
                  for (s1 = size + (size - s0) - 1;
                       s1 > size && HAVE_SIZE (xfont, s1); s1++);
                  size = (s1 > size ? s1 : s0);
                }
              font->property[MFONT_SIZE] = size * 10;

              if ((score = mfont__score (font, spec, request,
                                         limited_size)) >= 0
                  && (best_score < 0 || score < best_score))
              {
                best_score = score;
                best_font = (MFont *) (xfont_table->fonts + i);
                if (best_score == 0)
                  break;
              }
            }
          if (best_score == 0)
            break;
        }
    }
  if (! best_font)
    return NULL;

  MSTRUCT_CALLOC (rfont, MERROR_WIN);
  rfont->frame = frame;
  rfont->spec = *spec;
  rfont->request = *request;
  rfont->font = *best_font;
  if (best_font->property[MFONT_SIZE] == 0)
    rfont->font.property[MFONT_SIZE] = request->property[MFONT_SIZE];
  rfont->score = best_score;
  return rfont;
}


/* The X font driver function CLOSE.  */

static void
close_xfont (void *object)
{
  MXFontInfo *xfont_info = object;

  XFreeFont (xfont_info->display, xfont_info->xfont);
  free (object);
}


/* The X font driver function OPEN.  */

static int
xfont_open (MRealizedFont *rfont)
{
  char *name;
  MXFontInfo *xfont_info;
  MFrame *frame = rfont->frame;
  int mdebug_mask = MDEBUG_FONT;

  /* This never fail to generate a valid fontname because open_spec
     should correspond to a font available on the system.  */
  name = mfont_unparse_name (&rfont->font, Mx);
  M17N_OBJECT (xfont_info, close_xfont, MERROR_WIN);
  xfont_info->display = FRAME_DISPLAY (frame);
  xfont_info->xfont = XLoadQueryFont (FRAME_DISPLAY (frame), name);
  if (! xfont_info->xfont)
    {
      rfont->status = -1;
      free (xfont_info);
      MDEBUG_PRINT1 (" [XFONT] x %s\n", name);
      free (name);
      return -1;
    }
  rfont->info = xfont_info;
  MDEBUG_PRINT1 (" [XFONT] o %s\n", name);
  free (name);
  rfont->status = 1;
  rfont->ascent = xfont_info->xfont->ascent;
  rfont->descent = xfont_info->xfont->descent;
  rfont->type = Mx;
  rfont->fontp = xfont_info->xfont;
  return 0;
}


/* The X font driver function FIND_METRIC.  */

static void
xfont_find_metric (MRealizedFont *rfont, MGlyphString *gstring,
                   int from, int to)
{
  MXFontInfo *xfont_info = rfont->info;
  XFontStruct *xfont = xfont_info->xfont;
  MGlyph *g = MGLYPH (from), *gend = MGLYPH (to);

  for (; g != gend; g++)
    {
      if (g->code == MCHAR_INVALID_CODE)
        {
          g->lbearing = xfont->max_bounds.lbearing;
          g->rbearing = xfont->max_bounds.rbearing;
          g->width = xfont->max_bounds.width;
          g->ascent = xfont->ascent;
          g->descent = xfont->descent;
        }
      else
        {
          int byte1 = g->code >> 8, byte2 = g->code & 0xFF;
          XCharStruct *pcm = NULL;

          if (xfont->per_char != NULL)
            {
              if (xfont->min_byte1 == 0 && xfont->max_byte1 == 0)
                {
                  if (byte1 == 0
                      && byte2 >= xfont->min_char_or_byte2
                      && byte2 <= xfont->max_char_or_byte2)
                    pcm = xfont->per_char + byte2 - xfont->min_char_or_byte2;
                }
              else
                {
                  if (byte1 >= xfont->min_byte1
                      && byte1 <= xfont->max_byte1
                      && byte2 >= xfont->min_char_or_byte2
                      && byte2 <= xfont->max_char_or_byte2)
                    {
                      pcm = (xfont->per_char
                             + ((xfont->max_char_or_byte2
                                 - xfont->min_char_or_byte2 + 1)
                                * (byte1 - xfont->min_byte1))
                             + (byte2 - xfont->min_char_or_byte2));
                    }
                }
            }

          if (pcm)
            {
              g->lbearing = pcm->lbearing;
              g->rbearing = pcm->rbearing;
              g->width = pcm->width;
              g->ascent = pcm->ascent;
              g->descent = pcm->descent;
            }
          else
            {
              /* If the per_char pointer is null, all glyphs between
                 the first and last character indexes inclusive have
                 the same information, as given by both min_bounds and
                 max_bounds.  */
              g->lbearing = 0;
              g->rbearing = xfont->max_bounds.width;
              g->width = xfont->max_bounds.width;
              g->ascent = xfont->ascent;
              g->descent = xfont->descent;
            }
        }
    }
}


/* The X font driver function GET_GLYPH_ID.  */

static unsigned
xfont_encode_char (MRealizedFont *rfont, unsigned code)
{
  MXFontInfo *xfont_info;
  XFontStruct *xfont;
  unsigned min_byte1, max_byte1, min_byte2, max_byte2;
  int all_chars_exist;

  if (rfont->status < 0 || code >= 0x10000)
    return MCHAR_INVALID_CODE;
  if (rfont->status == 0)
    {
      if (xfont_open (rfont) < 0)
        return MCHAR_INVALID_CODE;
    }
  xfont_info = rfont->info;
  xfont = xfont_info->xfont;
  all_chars_exist = (! xfont->per_char || xfont->all_chars_exist == True);
  min_byte1 = xfont->min_byte1;
  max_byte1 = xfont->max_byte1;
  min_byte2 = xfont->min_char_or_byte2;
  max_byte2 = xfont->max_char_or_byte2;

  if (min_byte1 == 0 && max_byte1 == 0)
    {
      XCharStruct *pcm;

      if (code < min_byte2 || code > max_byte2)
        return MCHAR_INVALID_CODE;
      if (all_chars_exist)
        return code;
      pcm = xfont->per_char + (code - min_byte2);
      return ((pcm->width > 0 || pcm->rbearing != pcm->lbearing)
              ? code : MCHAR_INVALID_CODE);
    }
  else
    {
      unsigned byte1 = code >> 8, byte2 = code & 0xFF;
      XCharStruct *pcm;

      if (byte1 < min_byte1 || byte1 > max_byte1
          || byte2 < min_byte2 || byte2 > max_byte2)
        return MCHAR_INVALID_CODE;

      if (all_chars_exist)
        return code;
      pcm = xfont->per_char + ((byte1 - min_byte1) * (max_byte2 - min_byte2 + 1)
                           + (byte2 - min_byte2));
      return ((pcm->width > 0 || pcm->rbearing != pcm->lbearing)
              ? code : MCHAR_INVALID_CODE);
    }
}

/* The X font driver function RENDER.  */

static void
xfont_render (MDrawWindow win, int x, int y, MGlyphString *gstring,
              MGlyph *from, MGlyph *to, int reverse, MDrawRegion region)
{
  MRealizedFace *rface = from->rface;
  MXFontInfo *xfont_info = rface->rfont->info;
  Display *display;
  XChar2b *code;
  GC gc = ((GCInfo *) rface->info)->gc[reverse ? GC_INVERSE : GC_NORMAL];
  MGlyph *g;
  int i;

  if (from == to)
    return;

  /* It is assured that the all glyphs in the current range use the
     same realized face.  */
  display = FRAME_DISPLAY (rface->frame);

  if (region)
    gc = set_region (rface->frame, gc, region);
  XSetFont (display, gc, xfont_info->xfont->fid);
  code = (XChar2b *) alloca (sizeof (XChar2b) * (to - from));
  for (i = 0, g = from; g < to; i++, g++)
    {
      code[i].byte1 = g->code >> 8;
      code[i].byte2 = g->code & 0xFF;
    }

  g = from;
  while (g < to)
    {
      if (g->type == GLYPH_PAD)
        x += g++->width;
      else if (g->type == GLYPH_SPACE)
        for (; g < to && g->type == GLYPH_SPACE; g++)
          x += g->width;
      else if (! g->rface->rfont)
        {
          if ((g->c >= 0x200B && g->c <= 0x200F)
              || (g->c >= 0x202A && g->c <= 0x202E))
            x += g++->width;
          else
            {
              /* As a font is not found for this character, draw an
                 empty box.  */
              int box_width = g->width;
              int box_height = gstring->ascent + gstring->descent;

              if (box_width > 4)
                box_width -= 2;
              if (box_height > 4)
                box_height -= 2;
              XDrawRectangle (display, (Window) win, gc,
                              x, y - gstring->ascent, box_width, box_height);
              x += g++->width;
            }
        }
      else if (g->xoff != 0 || g->yoff != 0 || g->right_padding)
        {
          XDrawString16 (display, (Window) win, gc,
                         x + g->xoff, y + g->yoff, code + (g - from), 1);
          x += g->width;
          g++;
        }
      else
        {
          int orig_x = x;
          int code_idx = g - from;

          for (i = 0;
               g < to && g->type == GLYPH_CHAR && g->xoff == 0 && g->yoff == 0;
               i++, g++)
              x += g->width;
          XDrawString16 (display, (Window) win, gc, orig_x, y,
                         code + code_idx, i);
        }
    }
}

static void
xfont_list (MFrame *frame, MPlist *plist, MFont *font, MSymbol language)
{
  MDisplayInfo *disp_info = FRAME_DEVICE (frame)->display_info;
  MPlist *p;

  /* We have not yet implemented the language check.  */
  MPLIST_DO (p, disp_info->base_font_list)
    if (! font
        || mfont__match_p ((MFont *) MPLIST_VAL (p), font, MFONT_REGISTRY))
      mplist_push (plist, MPLIST_KEY (p), MPLIST_VAL (p));
}

\f
/* Xft Handler */

#ifdef HAVE_XFT2

typedef struct
{
  M17NObject control;
  Display *display;
  XftFont *font_aa;
  XftFont *font_no_aa;
} MXftFontInfo;

static int xft_open (MRealizedFont *);
static void xft_find_metric (MRealizedFont *, MGlyphString *, int, int);
static void xft_render (MDrawWindow, int, int, MGlyphString *,
                        MGlyph *, MGlyph *, int, MDrawRegion);

MFontDriver xft_driver =
  { NULL,                       /* Set to ft_select in device_init (). */
    xft_open, xft_find_metric,
    NULL,                       /* Set to ft_encode_char in device_init (). */
    xft_render,
    NULL                        /* Set to ft_list in device_init (). */
  };


static void
close_xft (void *object)
{
  MXftFontInfo *font_info = object;

  XftFontClose (font_info->display, font_info->font_aa);
  XftFontClose (font_info->display, font_info->font_no_aa);
  free (font_info);
}


static XftFont *
xft_open_font (MFrame *frame, MFTInfo *ft_info, int size, int anti_alias)
{
  XftPattern *pattern;
  XftFontInfo *xft_font_info;
  XftFont *font;

  pattern = XftPatternCreate ();
  XftPatternAddString (pattern, XFT_FILE, ft_info->filename);
  XftPatternAddDouble (pattern, XFT_PIXEL_SIZE, (double) size);
  XftPatternAddBool (pattern, XFT_ANTIALIAS, anti_alias);
  xft_font_info = XftFontInfoCreate (FRAME_DISPLAY (frame), pattern);
  if (! xft_font_info)
    return NULL;
  font = XftFontOpenInfo (FRAME_DISPLAY (frame), pattern, xft_font_info);
  XftFontInfoDestroy (FRAME_DISPLAY (frame), xft_font_info);
  return font;
}


static int
xft_open (MRealizedFont *rfont)
{
  MFrame *frame;
  MFTInfo *ft_info;
  MXftFontInfo *font_info;
  int size;

  if ((mfont__ft_driver.open) (rfont) < 0)
    return -1;

  size = rfont->font.property[MFONT_SIZE] / 10;
  frame = rfont->frame;

  ft_info = rfont->info;
  M17N_OBJECT (font_info, close_xft, MERROR_WIN);
  ft_info->extra_info = font_info;
  font_info->display = FRAME_DISPLAY (frame);
  font_info->font_aa = xft_open_font (frame, ft_info, size, 1);
  if (font_info->font_aa)
    {
      font_info->font_no_aa = xft_open_font (frame, ft_info, size, 0);
      if (font_info->font_no_aa)
        {
          rfont->type = Mxft;
          rfont->fontp = font_info->font_no_aa;
          return 0;
        }
      XftFontClose (FRAME_DISPLAY (rfont->frame), font_info->font_aa);
    }
  free (font_info);  
  ft_info->extra_info = NULL;
  rfont->status = -1;
  return -1;
}


static void
xft_find_metric (MRealizedFont *rfont, MGlyphString *gstring,
                int from, int to)
{
  MFTInfo *ft_info = rfont->info;
  MXftFontInfo *font_info = ft_info->extra_info;
  MGlyph *g = MGLYPH (from), *gend = MGLYPH (to);

  for (; g != gend; g++)
    {
      if (g->code == MCHAR_INVALID_CODE)
        {
          MGlyph *start = g++;

          while (g != gend && g->code == MCHAR_INVALID_CODE) g++;
          (mfont__ft_driver.find_metric) (rfont, gstring, GLYPH_INDEX (start),
                                          GLYPH_INDEX (g));
          g--;
        }
      else
        {
          XGlyphInfo extents;

          XftGlyphExtents (FRAME_DISPLAY (gstring->frame),
                           font_info->font_aa, &g->code, 1, &extents);
          g->lbearing = - extents.x;
          g->rbearing = extents.width - extents.x;
          g->width = extents.xOff;
          g->ascent = extents.y;
          g->descent = extents.height - extents.y;
        }
    }
}


static void 
xft_render (MDrawWindow win, int x, int y,
            MGlyphString *gstring, MGlyph *from, MGlyph *to,
            int reverse, MDrawRegion region)
{
  MRealizedFace *rface = from->rface;
  MFrame *frame = rface->frame;
  MFTInfo *ft_info = rface->rfont->info;
  MXftFontInfo *font_info = ft_info->extra_info;
  XftDraw *xft_draw = FRAME_DEVICE (frame)->xft_draw;
  XftColor *xft_color = (! reverse
                         ? &((GCInfo *) rface->info)->xft_color_fore
                         : &((GCInfo *) rface->info)->xft_color_back);
  XftFont *xft_font = (gstring->control.anti_alias
                       && FRAME_DEVICE (frame)->depth > 1
                       ? font_info->font_aa : font_info->font_no_aa);
  MGlyph *g;
  FT_UInt *glyphs;
  int last_x;
  int nglyphs;

  if (from == to)
    return;

  XftDrawChange (xft_draw, (Drawable) win);
  XftDrawSetClip (xft_draw, (Region) region);
      
  glyphs = alloca (sizeof (FT_UInt) * (to - from));
  for (last_x = x, nglyphs = 0, g = from; g < to; x += g++->width)
    {
      if (g->xoff == 0 && g->yoff == 0 && !g->left_padding && !g->right_padding)
        glyphs[nglyphs++] = g->code;
      else
        {
          if (nglyphs > 0)
            XftDrawGlyphs (xft_draw, xft_color, xft_font,
                           last_x, y, glyphs, nglyphs);
          nglyphs = 0;
          XftDrawGlyphs (xft_draw, xft_color, xft_font,
                         x + g->xoff, y + g->yoff, (FT_UInt *) &g->code, 1);
          last_x = x + g->width;
        }
    }
  if (nglyphs > 0)
    XftDrawGlyphs (xft_draw, xft_color, xft_font, last_x, y, glyphs, nglyphs);
}

#endif

\f
/* Functions for the device driver.  */

static void
mwin__close_device (MFrame *frame)
{
  M17N_OBJECT_UNREF (FRAME_DEVICE (frame));
}

static void *
mwin__device_get_prop (MFrame *frame, MSymbol key)
{
  MWDevice *device = FRAME_DEVICE (frame);

  if (key == Mdisplay)
    return (void *) device->display_info->display;
  if (key == Mscreen)
    return (void *) ScreenOfDisplay(device->display_info->display,
                                    device->screen_num);
  if (key == Mcolormap)
    return (void *) device->cmap;
  if (key == Mdepth)
    return (void *) device->depth;
  return NULL;
}

static void
mwin__realize_face (MRealizedFace *rface)
{
  MFrame *frame;
  MSymbol foreground, background, videomode;
  MFaceHLineProp *hline;
  MFaceBoxProp *box;
  GCInfo *info;

  if (rface != rface->ascii_rface)
    {
      rface->info = rface->ascii_rface->info;
      return;
    }

  frame = rface->frame;
  MSTRUCT_CALLOC (info, MERROR_WIN);

  foreground = rface->face.property[MFACE_FOREGROUND];
  background = rface->face.property[MFACE_BACKGROUND];
  videomode = rface->face.property[MFACE_VIDEOMODE];
  if (! videomode)
    videomode = frame->videomode;
  if (videomode != Mreverse)
    {
      info->gc[GC_NORMAL] = get_gc (frame, foreground, 1, &info->rgb_fore);
      info->gc[GC_INVERSE] = get_gc (frame, background, 0, &info->rgb_back);
    }
  else
    {
      info->gc[GC_NORMAL] = get_gc (frame, background, 0, &info->rgb_fore);
      info->gc[GC_INVERSE] = get_gc (frame, foreground, 1, &info->rgb_back);
    }
#ifdef HAVE_XFT2
  if (foreground == Mnil)
    foreground = frame->foreground;
  if (background == Mnil)
    background = frame->background;
  if (videomode == Mreverse)
    {
      MSymbol temp = foreground;
      foreground = background;
      background = temp;
    }
  if (! XftColorAllocName (FRAME_DISPLAY (frame),
                           FRAME_VISUAL (frame),
                           FRAME_CMAP (frame),
                           MSYMBOL_NAME (foreground),
                           &info->xft_color_fore))
    mdebug_hook ();
  if (! XftColorAllocName (FRAME_DISPLAY (frame),
                           FRAME_VISUAL (frame),
                           FRAME_CMAP (frame),
                           MSYMBOL_NAME (background),
                           &info->xft_color_back))
    mdebug_hook ();
#endif

  hline = rface->hline;
  if (hline)
    {
      if (hline->color)
        info->gc[GC_HLINE] = get_gc (frame, hline->color, 1, NULL);
      else
        info->gc[GC_HLINE] = info->gc[GC_NORMAL];
    }

  box = rface->box;
  if (box)
    {
      if (box->color_top)
        info->gc[GC_BOX_TOP] = get_gc (frame, box->color_top, 1, NULL);
      else
        info->gc[GC_BOX_TOP] = info->gc[GC_NORMAL];

      if (box->color_left && box->color_left != box->color_top)
        info->gc[GC_BOX_LEFT] = get_gc (frame, box->color_left, 1, NULL);
      else
        info->gc[GC_BOX_LEFT] = info->gc[GC_BOX_TOP];

      if (box->color_bottom && box->color_bottom != box->color_top)
        info->gc[GC_BOX_BOTTOM] = get_gc (frame, box->color_bottom, 1, NULL);
      else
        info->gc[GC_BOX_BOTTOM] = info->gc[GC_BOX_TOP];

      if (box->color_right && box->color_right != box->color_bottom)
        info->gc[GC_BOX_RIGHT] = get_gc (frame, box->color_right, 1, NULL);
      else
        info->gc[GC_BOX_RIGHT] = info->gc[GC_BOX_BOTTOM];
    }

  rface->info = info;
}


static void
mwin__free_realized_face (MRealizedFace *rface)
{
  if (rface == rface->ascii_rface)
    free (rface->info);
}


static void
mwin__fill_space (MFrame *frame, MDrawWindow win, MRealizedFace *rface,
                  int reverse,
                  int x, int y, int width, int height, MDrawRegion region)
{
  GC gc = ((GCInfo *) rface->info)->gc[reverse ? GC_NORMAL : GC_INVERSE];

  if (region)
    gc = set_region (frame, gc, region);

  XFillRectangle (FRAME_DISPLAY (frame), (Window) win, gc,
                  x, y, width, height);
}


static void
mwin__draw_empty_boxes (MDrawWindow win, int x, int y,
                        MGlyphString *gstring, MGlyph *from, MGlyph *to,
                        int reverse, MDrawRegion region)
{
  MRealizedFace *rface = from->rface;
  Display *display = FRAME_DISPLAY (rface->frame);
  GC gc = ((GCInfo *) rface->info)->gc[reverse ? GC_INVERSE : GC_NORMAL];

  if (from == to)
    return;

  if (region)
    gc = set_region (rface->frame, gc, region);
  for (; from < to; from++)
    {
      XDrawRectangle (display, (Window) win, gc,
                      x, y - gstring->ascent + 1, from->width - 1,
                      gstring->ascent + gstring->descent - 2);
      x += from->width;
    }
}


static void
mwin__draw_hline (MFrame *frame, MDrawWindow win, MGlyphString *gstring,
                 MRealizedFace *rface, int reverse,
                 int x, int y, int width, MDrawRegion region)
{
  enum MFaceHLineType type = rface->hline->type;
  GCInfo *info = rface->info;
  GC gc = gc = info->gc[GC_HLINE];
  int i;

  y = (type == MFACE_HLINE_BOTTOM
       ? y + gstring->text_descent - rface->hline->width
       : type == MFACE_HLINE_UNDER
       ? y + 1
       : type == MFACE_HLINE_STRIKE_THROUGH
       ? y - ((gstring->ascent + gstring->descent) / 2)
       : y - gstring->text_ascent);
  if (region)
    gc = set_region (frame, gc, region);

  for (i = 0; i < rface->hline->width; i++)
    XDrawLine (FRAME_DISPLAY (frame), (Window) win, gc,
               x, y + i, x + width - 1, y + i);
}


static void
mwin__draw_box (MFrame *frame, MDrawWindow win, MGlyphString *gstring,
                MGlyph *g, int x, int y, int width, MDrawRegion region)
{
  Display *display = FRAME_DISPLAY (frame);
  MRealizedFace *rface = g->rface;
  MFaceBoxProp *box = rface->box;
  GCInfo *info = rface->info;
  GC gc_top, gc_left, gc_right, gc_btm;
  int y0, y1;
  int i;

  y0 = y - (gstring->text_ascent
            + rface->box->inner_vmargin + rface->box->width);
  y1 = y + (gstring->text_descent
            + rface->box->inner_vmargin + rface->box->width - 1);

  gc_top = info->gc[GC_BOX_TOP];
  if (region)
    gc_top = set_region (frame, gc_top, region);
  if (info->gc[GC_BOX_TOP] == info->gc[GC_BOX_BOTTOM])
    gc_btm = gc_top;
  else
    gc_btm = info->gc[GC_BOX_BOTTOM];

  if (g->type == GLYPH_BOX)
    {
      int x0, x1;

      if (g->left_padding)
        x0 = x + box->outer_hmargin, x1 = x + g->width - 1;
      else
        x0 = x, x1 = x + g->width - box->outer_hmargin - 1;

      /* Draw the top side.  */
      for (i = 0; i < box->width; i++)
        XDrawLine (display, (Window) win, gc_top, x0, y0 + i, x1, y0 + i);

      /* Draw the bottom side.  */
      if (region && gc_btm != gc_top)
        gc_btm = set_region (frame, gc_btm, region);
      for (i = 0; i < box->width; i++)
        XDrawLine (display, (Window) win, gc_btm, x0, y1 - i, x1, y1 - i);

      if (g->left_padding > 0)
        {
          /* Draw the left side.  */
          if (info->gc[GC_BOX_LEFT] == info->gc[GC_BOX_TOP])
            gc_left = gc_top;
          else
            {
              gc_left = info->gc[GC_BOX_LEFT];
              if (region)
                gc_left = set_region (frame, gc_left, region);
            }
          for (i = 0; i < rface->box->width; i++)
            XDrawLine (display, (Window) win, gc_left,
                       x0 + i, y0 + i, x0 + i, y1 - i);
        }
      else
        {
          /* Draw the right side.  */
          if (info->gc[GC_BOX_RIGHT] == info->gc[GC_BOX_TOP])
            gc_right = gc_top;
          else
            {
              gc_right = info->gc[GC_BOX_RIGHT];
              if (region)
                gc_right = set_region (frame, gc_right, region);
            }
          for (i = 0; i < rface->box->width; i++)
            XDrawLine (display, (Window) win, gc_right,
                       x1 - i, y0 + i, x1 - i, y1 - i);
        }
    }
  else
    {
      /* Draw the top side.  */
      for (i = 0; i < box->width; i++)
        XDrawLine (display, (Window) win, gc_top,
                   x, y0 + i, x + width - 1, y0 + i);

      /* Draw the bottom side.  */
      if (region && gc_btm != gc_top)
        gc_btm = set_region (frame, gc_btm, region);
      for (i = 0; i < box->width; i++)
        XDrawLine (display, (Window) win, gc_btm,
                   x, y1 - i, x + width - 1, y1 - i);
    }
}


#if 0
static void
mwin__draw_bitmap (MFrame *frame, MDrawWindow win, MRealizedFace *rface,
                   int reverse, int x, int y,
                   int width, int height, int row_bytes, unsigned char *bmp,
                   MDrawRegion region)
{
  Display *display = FRAME_DISPLAY (frame);
  int i, j;
  GC gc = ((GCInfo *) rface->info)->gc[reverse ? GC_INVERSE : GC_NORMAL];

  if (region)
    gc = set_region (frame, gc, region);

  for (i = 0; i < height; i++, bmp += row_bytes)
    for (j = 0; j < width; j++)
      if (bmp[j / 8] & (1 << (7 - (j % 8))))
        XDrawPoint (display, (Window) win, gc, x + j, y + i);
}
#endif

static void
mwin__draw_points (MFrame *frame, MDrawWindow win, MRealizedFace *rface,
                   int intensity, MDrawPoint *points, int num,
                   MDrawRegion region)
{
  GCInfo *info = rface->info;
  GC gc;

  if (! (gc = info->gc[intensity]))
    gc = info->gc[intensity] = get_gc_for_anti_alias (FRAME_DEVICE (frame),
                                                      info, intensity);
  if (region)
    gc = set_region (frame, gc, region);

  XDrawPoints (FRAME_DISPLAY (frame), (Window) win, gc,
               (XPoint *) points, num, CoordModeOrigin);
}


static MDrawRegion
mwin__region_from_rect (MDrawMetric *rect)
{
  MDrawRegion region1 = XCreateRegion ();
  MDrawRegion region2 = XCreateRegion ();
  XRectangle xrect;

  xrect.x = rect->x;
  xrect.y = rect->y;
  xrect.width = rect->width;
  xrect.height = rect->height;
  XUnionRectWithRegion (&xrect, region1, region2);
  XDestroyRegion (region1);
  return region2;
}

static void
mwin__union_rect_with_region (MDrawRegion region, MDrawMetric *rect)
{
  MDrawRegion region1 = XCreateRegion ();
  XRectangle xrect;

  xrect.x = rect->x;
  xrect.y = rect->y;
  xrect.width = rect->width;
  xrect.height = rect->height;

  XUnionRegion (region, region, region1);
  XUnionRectWithRegion (&xrect, region1, region);
  XDestroyRegion (region1);
}

static void
mwin__intersect_region (MDrawRegion region1, MDrawRegion region2)
{
  MDrawRegion region = XCreateRegion ();

  XUnionRegion (region1, region1, region);
  XIntersectRegion (region, region2, region1);
  XDestroyRegion (region);
}

static void
mwin__region_add_rect (MDrawRegion region, MDrawMetric *rect)
{
  MDrawRegion region1 = XCreateRegion ();
  XRectangle xrect;

  xrect.x = rect->x;
  xrect.y = rect->y;
  xrect.width = rect->width;
  xrect.height = rect->height;
  XUnionRectWithRegion (&xrect, region1, region);
  XDestroyRegion (region1);
}

static void
mwin__region_to_rect (MDrawRegion region, MDrawMetric *rect)
{
  XRectangle xrect;

  XClipBox (region, &xrect);
  rect->x = xrect.x;
  rect->y = xrect.y;
  rect->width = xrect.width;
  rect->height = xrect.height;
}

static void
mwin__free_region (MDrawRegion region)
{
  XDestroyRegion (region);
}

static void
mwin__dump_region (MDrawRegion region)
{
  XRectangle rect;
  XClipBox (region, &rect);
  fprintf (stderr, "(%d %d %d %d)\n", rect.x, rect.y, rect.width, rect.height);
}


static MDrawWindow
mwin__create_window (MFrame *frame, MDrawWindow parent)
{
  Display *display = FRAME_DISPLAY (frame);
  Window win;
  XWMHints wm_hints = { InputHint, False };
  XClassHint class_hints = { "M17N-IM", "m17n-im" };
  XSetWindowAttributes set_attrs;
  unsigned long mask;
  XGCValues values;
  GCInfo *info = frame->rface->info;

  if (! parent)
    parent = (MDrawWindow) RootWindow (display, FRAME_SCREEN (frame));
  mask = GCForeground;
  XGetGCValues (display, info->gc[GC_INVERSE], mask, &values);
  set_attrs.background_pixel = values.foreground;
  set_attrs.backing_store = Always;
  set_attrs.override_redirect = True;
  set_attrs.save_under = True;
  mask = CWBackPixel | CWBackingStore | CWOverrideRedirect | CWSaveUnder;
  win = XCreateWindow (display, (Window) parent, 0, 0, 1, 1, 0,
                       CopyFromParent, InputOutput, CopyFromParent,
                       mask, &set_attrs);
  XSetWMProperties (display, (Window) win, NULL, NULL, NULL, 0,
                    NULL, &wm_hints, &class_hints);
  XSelectInput (display, (Window) win, StructureNotifyMask | ExposureMask);
  return (MDrawWindow) win;
}

static void
mwin__destroy_window (MFrame *frame, MDrawWindow win)
{
  XDestroyWindow (FRAME_DISPLAY (frame), (Window) win);
}

#if 0
static MDrawWindow
mwin__event_window (void *event)
{
  return ((MDrawWindow) ((XEvent *) event)->xany.window);
}

static void
mwin__print_event (void *arg, char *win_name)
{
  char *event_name;
  XEvent *event = (XEvent *) arg;

  switch (event->xany.type)
    {
    case 2: event_name = "KeyPress"; break;
    case 3: event_name = "KeyRelease"; break;
    case 4: event_name = "ButtonPress"; break;
    case 5: event_name = "ButtonRelease"; break;
    case 6: event_name = "MotionNotify"; break;
    case 7: event_name = "EnterNotify"; break;
    case 8: event_name = "LeaveNotify"; break;
    case 9: event_name = "FocusIn"; break;
    case 10: event_name = "FocusOut"; break;
    case 11: event_name = "KeymapNotify"; break;
    case 12: event_name = "Expose"; break;
    case 13: event_name = "GraphicsExpose"; break;
    case 14: event_name = "NoExpose"; break;
    case 15: event_name = "VisibilityNotify"; break;
    case 16: event_name = "CreateNotify"; break;
    case 17: event_name = "DestroyNotify"; break;
    case 18: event_name = "UnmapNotify"; break;
    case 19: event_name = "MapNotify"; break;
    case 20: event_name = "MapRequest"; break;
    case 21: event_name = "ReparentNotify"; break;
    case 22: event_name = "ConfigureNotify"; break;
    case 23: event_name = "ConfigureRequest"; break;
    case 24: event_name = "GravityNotify"; break;
    case 25: event_name = "ResizeRequest"; break;
    case 26: event_name = "CirculateNotify"; break;
    case 27: event_name = "CirculateRequest"; break;
    case 28: event_name = "PropertyNotify"; break;
    case 29: event_name = "SelectionClear"; break;
    case 30: event_name = "SelectionRequest"; break;
    case 31: event_name = "SelectionNotify"; break;
    case 32: event_name = "ColormapNotify"; break;
    case 33: event_name = "ClientMessage"; break;
    case 34: event_name = "MappingNotify"; break;
    default: event_name = "unknown";
    }

  fprintf (stderr, "%s: %s\n", win_name, event_name);
}
#endif

static void
mwin__map_window (MFrame *frame, MDrawWindow win)
{
  XMapRaised (FRAME_DISPLAY (frame), (Window) win);
}

static void
mwin__unmap_window (MFrame *frame, MDrawWindow win)
{
  XUnmapWindow (FRAME_DISPLAY (frame), (Window) win);
}

static void
mwin__window_geometry (MFrame *frame, MDrawWindow win, MDrawWindow parent_win,
                       MDrawMetric *geometry)
{
  Display *display = FRAME_DISPLAY (frame);
  XWindowAttributes attr;
  Window parent = (Window) parent_win, root;

  XGetWindowAttributes (display, (Window) win, &attr);
  geometry->x = attr.x + attr.border_width;
  geometry->y = attr.y + attr.border_width;
  geometry->width = attr.width;
  geometry->height = attr.height; 

  if (! parent)
    parent = RootWindow (display, FRAME_SCREEN (frame));
  while (1)
    {
      Window this_parent, *children;
      unsigned n;

      XQueryTree (display, (Window) win, &root, &this_parent, &children, &n);
      if (children)
        XFree (children);
      if (this_parent == parent || this_parent == root)
        break;
      win = (MDrawWindow) this_parent;
      XGetWindowAttributes (display, (Window) win, &attr);
      geometry->x += attr.x + attr.border_width;
      geometry->y += attr.y + attr.border_width;
    }
}

static void
mwin__adjust_window (MFrame *frame, MDrawWindow win,
                     MDrawMetric *current, MDrawMetric *new)
{
  Display *display = FRAME_DISPLAY (frame);
  unsigned int mask = 0;
  XWindowChanges values;

  if (current->width != new->width)
    {
      mask |= CWWidth;
      if (new->width <= 0)
        new->width = 1;
      values.width = current->width = new->width;
    }
  if (current->height != new->height)
    {
      mask |= CWHeight;
      if (new->height <= 0)
        new->height = 1;
      values.height = current->height = new->height;
    }
  if (current->x != new->x)
    {
      mask |= CWX;
      values.x = current->x = new->x;
    }
  if (current->y != new->y)
    {
      mask |= CWY;
      current->y = new->y;
      values.y = current->y = new->y;
    }
  if (mask)
    XConfigureWindow (display, (Window) win, mask, &values);
  XClearWindow (display, (Window) win);
}

static MSymbol
mwin__parse_event (MFrame *frame, void *arg, int *modifiers)
{
  XEvent *event = (XEvent *) arg;
  MDisplayInfo *disp_info = FRAME_DEVICE (frame)->display_info;
  int len;
  char buf[512];
  KeySym keysym;
  MSymbol key;

  *modifiers = 0;
  if (event->xany.type != KeyPress
      /* && event->xany.type != KeyRelease */
      )
    return Mnil;
  len = XLookupString ((XKeyEvent *) event, (char *) buf, 512, &keysym, NULL);
  if (len > 1)
    return Mnil;
  if (len == 1)
    {
      int c = keysym;

      if (c < XK_space || c > XK_asciitilde)
        c = buf[0];
      if ((c == ' ' || c == 127) && ((XKeyEvent *) event)->state & ShiftMask)
        *modifiers |= MINPUT_KEY_SHIFT_MODIFIER;
      if (((XKeyEvent *) event)->state & ControlMask)
        {
          if (c >= 'a' && c <= 'z')
            c += 'A' - 'a';
          if (c >= ' ' && c < 127)
            *modifiers |= MINPUT_KEY_CONTROL_MODIFIER;
        }
      key = minput__char_to_key (c);
    }
  else if (keysym >= XK_Shift_L && keysym <= XK_Hyper_R)
    return Mnil;
  else
    {
      char *str = XKeysymToString (keysym);

      if (! str)
        return Mnil;
      key = msymbol (str);
      if (((XKeyEvent *) event)->state & ShiftMask)
        *modifiers |= MINPUT_KEY_SHIFT_MODIFIER;
      if (((XKeyEvent *) event)->state & ControlMask)
        *modifiers |= MINPUT_KEY_CONTROL_MODIFIER;
    }
  if (((XKeyEvent *) event)->state & disp_info->meta_mask)
    *modifiers |= MINPUT_KEY_META_MODIFIER;
  if (((XKeyEvent *) event)->state & disp_info->alt_mask)
    *modifiers |= MINPUT_KEY_ALT_MODIFIER;
  if (((XKeyEvent *) event)->state & disp_info->super_mask)
    *modifiers |= MINPUT_KEY_SUPER_MODIFIER;
  if (((XKeyEvent *) event)->state & disp_info->hyper_mask)
    *modifiers |= MINPUT_KEY_HYPER_MODIFIER;

  return key;
}


void
mwin__dump_gc (MFrame *frame, MRealizedFace *rface)
{
  unsigned long valuemask = GCForeground | GCBackground | GCClipMask;
  XGCValues values;
  Display *display = FRAME_DISPLAY (frame);
  GCInfo *info = rface->info;
  int i;

  for (i = 0; i <= GC_INVERSE; i++)
    {
      XGetGCValues (display, info->gc[i], valuemask, &values);
      fprintf (stderr, "GC%d: fore/#%lX back/#%lX", i,
               values.foreground, values.background);
      fprintf (stderr, "\n");
    }
}

static MDeviceDriver x_driver =
  {
    mwin__close_device,
    mwin__device_get_prop,
    mwin__realize_face,
    mwin__free_realized_face,
    mwin__fill_space,
    mwin__draw_empty_boxes,
    mwin__draw_hline,
    mwin__draw_box,
    mwin__draw_points,
    mwin__region_from_rect,
    mwin__union_rect_with_region,
    mwin__intersect_region,
    mwin__region_add_rect,
    mwin__region_to_rect,
    mwin__free_region,
    mwin__dump_region,
    mwin__create_window,
    mwin__destroy_window,
    mwin__map_window,
    mwin__unmap_window,
    mwin__window_geometry,
    mwin__adjust_window,
    mwin__parse_event
  };

/* Functions to be stored in MDeviceLibraryInterface by dlsym ().  */

int
device_init ()
{
  M_iso8859_1 = msymbol ("iso8859-1");
  M_iso10646_1 = msymbol ("iso10646-1");

  display_info_list = mplist ();
  device_list = mplist ();

#ifdef HAVE_XFT2
  xft_driver.select = mfont__ft_driver.select;
  xft_driver.encode_char = mfont__ft_driver.encode_char;
  xft_driver.list = mfont__ft_driver.list;
#endif

  Mxim = msymbol ("xim");
  msymbol_put (Mxim, Minput_driver, &minput_xim_driver);

  return 0;
}

int
device_fini ()
{
  M17N_OBJECT_UNREF (display_info_list);
  M17N_OBJECT_UNREF (device_list);
  return 0;
}

/** Return an MWDevice object corresponding to a display specified in
    PLIST.

    It searches device_list for a device matching the display.  If
    found, return the found object.  Otherwise, return a newly created
    object.  */

int
device_open (MFrame *frame, MPlist *param)
{
  Display *display = NULL;
  Screen *screen = NULL;
  int screen_num;
  Drawable drawable = 0;
  Widget widget = NULL;
  Colormap cmap = 0;
  int auto_display = 0;
  MDisplayInfo *disp_info = NULL;
  MWDevice *device = NULL;
  MSymbol key;
  XWindowAttributes attr;
  unsigned depth = 0;
  MPlist *plist;
  AppData app_data;
  MFace *face;

  for (plist = param; (key = mplist_key (plist)) != Mnil;
       plist = mplist_next (plist))
    {
      if (key == Mdisplay)
        display = (Display *) mplist_value (plist);
      else if (key == Mscreen)
        screen = mplist_value (plist);
      else if (key == Mdrawable)
        drawable = (Drawable) mplist_value (plist);
      else if (key == Mdepth)
        depth = (unsigned) mplist_value (plist);
      else if (key == Mwidget)
        widget = (Widget) mplist_value (plist);
      else if (key == Mcolormap)
        cmap = (Colormap) mplist_value (plist);
    }

  if (widget)
    {
      display = XtDisplay (widget);
      screen_num = XScreenNumberOfScreen (XtScreen (widget));
      depth = DefaultDepth (display, screen_num);
    }
  else if (drawable)
    {
      Window root_window;
      int x, y;
      unsigned width, height, border_width;

      if (! display)
        MERROR (MERROR_WIN, -1);
      XGetGeometry (display, drawable, &root_window,
                    &x, &y, &width, &height, &border_width, &depth);
      XGetWindowAttributes (display, root_window, &attr);
      screen_num = XScreenNumberOfScreen (attr.screen);
    }
  else
    {
      if (screen)
        display = DisplayOfScreen (screen);
      else
        {
          if (! display)
            {
              display = XOpenDisplay (NULL);
              if (! display)
                MERROR (MERROR_WIN, -1);
              auto_display = 1;
            }
          screen = DefaultScreenOfDisplay (display);
        }
      screen_num = XScreenNumberOfScreen (screen);
      if (! depth)
        depth = DefaultDepth (display, screen_num);
    }

  if (! cmap)
    cmap = DefaultColormap (display, screen_num);

  for (plist = display_info_list; mplist_key (plist) != Mnil;
       plist = mplist_next (plist))
    {
      disp_info = (MDisplayInfo *) mplist_value (plist);
      if (disp_info->display == display)
        break;
    }

  if (mplist_key (plist) != Mnil)
    M17N_OBJECT_REF (disp_info);
  else
    {
      M17N_OBJECT (disp_info, free_display_info, MERROR_WIN);
      disp_info->display = display;
      disp_info->auto_display = auto_display;
      disp_info->font_list = mplist ();
      disp_info->base_font_list = mplist ();
      find_modifier_bits (disp_info);
      mplist_add (display_info_list, Mt, disp_info);
    }  

  for (plist = device_list; mplist_key (plist) != Mnil;
       plist = mplist_next (plist))
    {
      device = (MWDevice *) mplist_value (plist);
      if (device->display_info == disp_info
          && device->depth == depth
          && device->cmap == cmap)
        break;
    }

  if (mplist_key (plist) != Mnil)
    M17N_OBJECT_REF (device);
  else
    {
      unsigned long valuemask = GCForeground;
      XGCValues values;

      M17N_OBJECT (device, free_device, MERROR_WIN);
      device->display_info = disp_info;
      device->screen_num = screen_num;
      /* A drawable on which to create GCs.  */
      device->drawable = XCreatePixmap (display,
                                        RootWindow (display, screen_num),
                                        1, 1, depth);
      device->depth = depth;
      device->cmap = cmap;
      device->realized_face_list = mplist ();
      device->realized_font_list = mplist ();
      device->realized_fontset_list = mplist ();
      device->gc_list = mplist ();
      values.foreground = BlackPixel (display, screen_num);
      device->scratch_gc = XCreateGC (display, device->drawable,
                                      valuemask, &values);
#ifdef HAVE_XFT2
      device->xft_draw = XftDrawCreate (display, device->drawable,
                                        DefaultVisual (display, screen_num),
                                        cmap);
#endif
    }

  frame->device = device;
  frame->device_type = MDEVICE_SUPPORT_OUTPUT | MDEVICE_SUPPORT_INPUT;
  frame->driver = &x_driver;
  frame->font_driver_list = mplist ();
  mplist_add (frame->font_driver_list, Mx, &xfont_driver);
#ifdef HAVE_XFT2
  mplist_add (frame->font_driver_list, Mfreetype, &xft_driver);
#elif HAVE_FREETYPE
  mplist_add (frame->font_driver_list, Mfreetype, &mfont__ft_driver);
#endif
  frame->realized_font_list = device->realized_font_list;
  frame->realized_face_list = device->realized_face_list;
  frame->realized_fontset_list = device->realized_fontset_list;

  if (widget)
    {
      XtResource resources[] = {
        { XtNfont, XtCFont, XtRString, sizeof (String),
          XtOffset (AppDataPtr, font), XtRString, DEFAULT_FONT },
        { XtNforeground, XtCForeground, XtRString, sizeof (String),
          XtOffset (AppDataPtr, foreground), XtRString, "black" },
        { XtNbackground, XtCBackground, XtRString, sizeof (String),
          XtOffset (AppDataPtr, background), XtRString, "white" },
        { XtNreverseVideo, XtCReverseVideo, XtRBoolean, sizeof (Boolean),
          XtOffset (AppDataPtr, reverse_video), XtRImmediate, (caddr_t) FALSE }
      };

      XtGetApplicationResources (widget, &app_data,
                                 resources, XtNumber (resources), NULL, 0);
      frame->foreground = msymbol (app_data.foreground);
      frame->background = msymbol (app_data.background);
      frame->videomode = app_data.reverse_video == True ? Mreverse : Mnormal;
    }
  else
    {
      app_data.font = DEFAULT_FONT;
      frame->foreground = msymbol ("black");
      frame->background = msymbol ("white");
      frame->videomode = Mnormal;
    }

  {
    int nfonts;
    char **names = XListFonts (display, app_data.font, 1, &nfonts);

    if (nfonts > 0)
      {
        if (! (frame->font = mfont_parse_name (names[0], Mx)))
          {
            /* The font name does not conform to XLFD.  Try to open the
               font and get XA_FONT property.  */
            XFontStruct *xfont = XLoadQueryFont (display, names[0]);

            nfonts = 0;
            if (xfont)
              {
                unsigned long value;
                char *name;

                if (XGetFontProperty (xfont, XA_FONT, &value)
                    && (name = ((char *)
                                XGetAtomName (display, (Atom) value))))
                  {
                    if ((frame->font = mfont_parse_name (name, Mx)))
                      nfonts = 1;
                  }
                XFreeFont (display, xfont);
              }
          }
        XFreeFontNames (names);
      }
    if (! nfonts)
      frame->font = mfont_parse_name (FALLBACK_FONT, Mx);
  }

  face = mface_from_font (frame->font);
  face->property[MFACE_FONTSET] = mfontset (NULL);
  face->property[MFACE_FOREGROUND] = frame->foreground;
  face->property[MFACE_BACKGROUND] = frame->background;
  mface_put_prop (face, Mhline, mface_get_prop (mface__default, Mhline));
  mface_put_prop (face, Mbox, mface_get_prop (mface__default, Mbox));
  face->property[MFACE_VIDEOMODE] = frame->videomode;
  mface_put_prop (face, Mhook_func, 
                  mface_get_prop (mface__default, Mhook_func));
  face->property[MFACE_RATIO] = (void *) 100;
  mplist_push (param, Mface, face);
  M17N_OBJECT_UNREF (face);

#ifdef X_SET_ERROR_HANDLER
  XSetErrorHandler (x_error_handler);
  XSetIOErrorHandler (x_io_error_handler);
#endif

  return 0;
}

\f

/* XIM (X Input Method) handler */

typedef struct MInputXIMMethodInfo
{
  Display *display;
  XIM xim;
  MSymbol language;
  MSymbol coding;
} MInputXIMMethodInfo;

typedef struct MInputXIMContextInfo
{
  XIC xic;
  Window win;
  MConverter *converter;
} MInputXIMContextInfo;

static int
xim_open_im (MInputMethod *im)
{
  MInputXIMArgIM *arg = (MInputXIMArgIM *) im->arg;
  MLocale *saved, *this;
  char *save_modifier_list;
  XIM xim;
  MInputXIMMethodInfo *im_info;

  saved = mlocale_set (LC_CTYPE, NULL);
  this = mlocale_set (LC_CTYPE, arg->locale ? arg->locale : "");
  if (! this)
    /* The specified locale is not supported.  */
    MERROR (MERROR_LOCALE, -1);
  if (mlocale_get_prop (this, Mcoding) == Mnil)
    {
      /* Unable to decode the output of XIM.  */
      mlocale_set (LC_CTYPE, msymbol_name (mlocale_get_prop (saved, Mname)));
      MERROR (MERROR_LOCALE, -1);
    }

  if (arg->modifier_list)
    save_modifier_list = XSetLocaleModifiers (arg->modifier_list);
  else
    save_modifier_list = XSetLocaleModifiers ("");
  if (! save_modifier_list)
    {
      /* The specified locale is not supported by X.  */
      mlocale_set (LC_CTYPE, msymbol_name (mlocale_get_prop (saved, Mname)));
      MERROR (MERROR_LOCALE, -1);
    }

  xim = XOpenIM (arg->display, arg->db, arg->res_name, arg->res_class);
  if (! xim)
    {
      /* No input method is available in the current locale.  */
      XSetLocaleModifiers (save_modifier_list);
      mlocale_set (LC_CTYPE, msymbol_name (mlocale_get_prop (saved, Mname)));
      MERROR (MERROR_WIN, -1);
    }

  MSTRUCT_MALLOC (im_info, MERROR_WIN);
  im_info->display = arg->display;
  im_info->xim = xim;
  im_info->language = mlocale_get_prop (this, Mlanguage);
  im_info->coding = mlocale_get_prop (this, Mcoding);
  im->info = im_info;

  XSetLocaleModifiers (save_modifier_list);
  mlocale_set (LC_CTYPE, msymbol_name (mlocale_get_prop (saved, Mname)));

  return 0;
}

static void
xim_close_im (MInputMethod *im)
{
  MInputXIMMethodInfo *im_info = (MInputXIMMethodInfo *) im->info;

  XCloseIM (im_info->xim);
  free (im_info);
}

static int
xim_create_ic (MInputContext *ic)
{
  MInputXIMArgIC *arg = (MInputXIMArgIC *) ic->arg;
  MInputXIMMethodInfo *im_info = (MInputXIMMethodInfo *) ic->im->info;
  MInputXIMContextInfo *ic_info;
  XIC xic;

  if (! arg->input_style)
    {
      /* By default, use Root style.  */
      arg->input_style = XIMPreeditNothing | XIMStatusNothing;
      arg->preedit_attrs = NULL;
      arg->status_attrs = NULL;
    }

  if (! arg->preedit_attrs && ! arg->status_attrs)
    xic = XCreateIC (im_info->xim,
                     XNInputStyle, arg->input_style,
                     XNClientWindow, arg->client_win,
                     XNFocusWindow, arg->focus_win,
                     NULL);
  else if (arg->preedit_attrs && ! arg->status_attrs)
    xic = XCreateIC (im_info->xim,
                     XNInputStyle, arg->input_style,
                     XNClientWindow, arg->client_win,
                     XNFocusWindow, arg->focus_win,
                     XNPreeditAttributes, arg->preedit_attrs,
                     NULL);
  else if (! arg->preedit_attrs && arg->status_attrs)
    xic = XCreateIC (im_info->xim,
                     XNInputStyle, arg->input_style,
                     XNClientWindow, arg->client_win,
                     XNFocusWindow, arg->focus_win,
                     XNStatusAttributes, arg->status_attrs,
                     NULL);
  else
    xic = XCreateIC (im_info->xim,
                     XNInputStyle, arg->input_style,
                     XNClientWindow, arg->client_win,
                     XNFocusWindow, arg->focus_win,
                     XNPreeditAttributes, arg->preedit_attrs,
                     XNStatusAttributes, arg->status_attrs,
                     NULL);
  if (! xic)
    MERROR (MERROR_WIN, -1);

  MSTRUCT_MALLOC (ic_info, MERROR_WIN);
  ic_info->xic = xic;
  ic_info->win = arg->focus_win;
  ic_info->converter = mconv_buffer_converter (im_info->coding, NULL, 0);
  ic->info = ic_info;
  return 0;
}

static void
xim_destroy_ic (MInputContext *ic)
{
  MInputXIMContextInfo *ic_info = (MInputXIMContextInfo *) ic->info;

  XDestroyIC (ic_info->xic);
  mconv_free_converter (ic_info->converter);
  free (ic_info);
  ic->info = NULL;
}

static int
xim_filter (MInputContext *ic, MSymbol key, void *event)
{
  MInputXIMContextInfo *ic_info = (MInputXIMContextInfo *) ic->info;

  return (XFilterEvent ((XEvent *) event, ic_info->win) == True);
}


static int
xim_lookup (MInputContext *ic, MSymbol key, void *arg, MText *mt)
{
  MInputXIMMethodInfo *im_info = (MInputXIMMethodInfo *) ic->im->info;
  MInputXIMContextInfo *ic_info = (MInputXIMContextInfo *) ic->info;
  XKeyPressedEvent *ev = (XKeyPressedEvent *) arg;
  KeySym keysym;
  Status status;
  char *buf;
  int len;

  buf = (char *) alloca (512);
  len = XmbLookupString (ic_info->xic, ev, buf, 512, &keysym, &status);
  if (status == XBufferOverflow)
    {
      buf = (char *) alloca (len);
      len = XmbLookupString (ic_info->xic, ev, buf, len, &keysym, &status);
    }

  mtext_reset (ic->produced);
  if (len == 0)
    return 1;

  mconv_reset_converter (ic_info->converter);
  mconv_rebind_buffer (ic_info->converter, (unsigned char *) buf, len);
  mconv_decode (ic_info->converter, ic->produced);
  mtext_put_prop (ic->produced, 0, mtext_nchars (ic->produced),
                  Mlanguage, (void *) im_info->language);
  mtext_cpy (mt, ic->produced);
  mtext_reset (ic->produced);  
  return 0;
}

\f

#ifdef X_SET_ERROR_HANDLER
static int
x_error_handler (Display *display, XErrorEvent *error)
{
  mdebug_hook ();
  return 0;
}

static int
x_io_error_handler (Display *display)
{
  mdebug_hook ();
  return 0;
}
#endif

/*=*/

/*** @} */
#endif /* !FOR_DOXYGEN || DOXYGEN_INTERNAL_MODULE */
\f
/* External API */

/*** @addtogroup m17nInputMethodWin */
/*=*/
/*** @{ */

/***en
    @brief Input method driver for XIM.

    The driver #minput_xim_driver is for the foreign input method of
    name #Mxim.  It uses XIM (X Input Methods) as a background input
    engine.

    As the symbol #Mxim has property #Minput_driver whose value is
    a pointer to this driver, the input method of language #Mnil
    and name #Mxim uses this driver.

    Therefore, for such input methods, the driver dependent arguments
    to the functions whose name begin with minput_ must be as follows.

    The argument $ARG of the function minput_open_im () must be a
    pointer to the structure #MInputXIMArgIM.  See the documentation
    of #MInputXIMArgIM for more details.

    The argument $ARG of the function minput_create_ic () must be a
    pointer to the structure #MInputXIMArgIC. See the documentation
    of #MInputXIMArgIC for more details.

    The argument $ARG of the function minput_filter () must be a
    pointer to the structure @c XEvent.  The argument $KEY is ignored.

    The argument $ARG of the function minput_lookup () must be the
    same one as that of the function minput_filter ().  The argument
    $KEY is ignored.  */

/***ja
    @brief XIMÍÑÆþÎϥɥ饤¥Ð.

    ¥É¥é¥¤¥Ð #minput_xim_driver ¤Ï #Mxim ¤ò̾Á°¤È¤·¤Æ»ý¤Ä³°ÉôÆþÎϥ᥽¥Ã
    ¥ÉÍѤǤ¢¤ê¡¢ XIM (X Input Methods) ¤ò¥Ð¥Ã¥¯¥°¥é¥¦¥ó¥É¤ÎÆþÎÏ¥¨¥ó¥¸
    ¥ó¤È¤·¤Æ»ÈÍѤ¹¤ë¡£

    ¥·¥ó¥Ü¥ë #Mxim ¤Ï¤³¤Î¥É¥é¥¤¥Ð¤Ø¤Î¥Ý¥¤¥ó¥¿¤òÃͤȤ¹¤ë¥×¥í¥Ñ¥Æ¥£
    #Minput_driver ¤ò»ý¤Á¡¢LANGUAGE ¤¬ #Mnil ¤Ç̾Á°¤¬ #Mxim ¤Ç¤¢¤ëÆþÎÏ
    ¥á¥½¥Ã¥É¤Ï¤³¤Î¥É¥é¥¤¥Ð¤òÍøÍѤ¹¤ë¡£

    ¤·¤¿¤¬¤Ã¤Æ¡¢¤½¤ì¤é¤ÎÆþÎϥ᥽¥Ã¥É¤Ç¤Ï¡¢minput_ ¤Ç»Ï¤Þ¤ë̾Á°¤ò»ý¤Ä´Ø
    ¿ô¤Î¥É¥é¥¤¥Ð¤Ë°Í¸¤¹¤ë°ú¿ô¤Ï¼¡¤Î¤è¤¦¤Ê¤â¤Î¤Ç¤Ê¤¯¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£

    ´Ø¿ô minput_open_im () ¤Î°ú¿ô $ARG ¤Ï¹½Â¤ÂÎ #MInputXIMArgIM ¤Ø¤Î¥Ý
    ¥¤¥ó¥¿¤Ç¤Ê¤¯¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£¾ÜºÙ¤Ë¤Ä¤¤¤Æ¤Ï #MInputXIMArgIM ¤ÎÀâÌÀ¤ò
    »²¾È¡£

    ´Ø¿ô minput_create_ic () ¤Î°ú¿ô $ARG ¤Ï¹½Â¤ÂÎ #MInputXIMArgIC ¤Ø¤Î
    ¥Ý¥¤¥ó¥¿¤Ç¤Ê¤¯¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£¾ÜºÙ¤Ë¤Ä¤¤¤Æ¤Ï #MInputXIMArgIC ¤ÎÀâÌÀ
    ¤ò»²¾È¡£

    ´Ø¿ô minput_filter () ¤Î°ú¿ô $ARG ¤Ï¹½Â¤ÂÎ @c XEvent ¤Ø¤Î¥Ý¥¤¥ó¥¿
    ¤Ç¤Ê¤¯¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£°ú¿ô $KEY ¤Ï̵»ë¤µ¤ì¤ë¡£

    ´Ø¿ô minput_lookup () ¤Î°ú¿ô $ARG ¤Ï´Ø¿ô function minput_filter () 
    ¤Î°ú¿ô $ARG ¤ÈƱ¤¸¤â¤Î¤Ç¤Ê¤¯¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£ °ú¿ô $KEY ¤Ï¡¢Ìµ»ë¤µ¤ì
    ¤ë¡£  */

MInputDriver minput_xim_driver =
  { xim_open_im, xim_close_im, xim_create_ic, xim_destroy_ic,
    xim_filter, xim_lookup, NULL };

/*** @} */ 

/*
  Local Variables:
  coding: euc-japan
  End:
*/