xim.c

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#endif
}

static long destroy_input_context (CWidget * w)
{
    w->input_context = 0;
    return 0;
}

void IMDestroyCallback (XIM xim, XPointer client_data, XPointer call_data)
{
    XRegisterIMInstantiateCallback (CDisplay, NULL, NULL, NULL,
				    IMInstantiateCallback, NULL);
    for_all_widgets ((void *) destroy_input_context, 0, 0);
    CIC = 0;
}

/* returns zero on error */
XIMStyle get_input_style (void)
{
    int found = 0;
    char tmp[1024] = "", *s = 0;
    char *end = 0, *next_s = 0;
    XIMStyle input_style = 0;
    XIMStyles *xim_styles = NULL;
    if (!CIM) {
	if (option_use_xim)
	    xim_print_error ("Trying to get input_style, but Input Method is null.");
	return 0;
    }
    if (XGetIMValues (CIM, XNQueryInputStyle, &xim_styles, NULL)
	|| !xim_styles) {
	xim_print_error ("input method doesn't support any style");
	return 0;
    }
#ifdef RXVT_SOURCE
    strncpy (tmp, (rs[Rs_preeditType] ? rs[Rs_preeditType]
		   : "OverTheSpot,OffTheSpot,Root"),
	     sizeof (tmp) - 1);
#else
    strncpy (tmp, "OverTheSpot,OffTheSpot,Root",
	     sizeof (tmp) - 1);
#endif
    for (found = 0, s = tmp; *s && !found; s = next_s + 1) {
	unsigned short i;

	for (; *s && isspace (*s); s++);
	if (!*s)
	    break;
	for (end = s; (*end && (*end != ',')); end++);
	for (next_s = end--; ((end >= s) && isspace (*end)); end--);
	*(end + 1) = '\0';

	if (!strcmp (s, "OverTheSpot"))
	    input_style = (XIMPreeditPosition | XIMStatusNothing);
	else if (!strcmp (s, "OffTheSpot"))
	    input_style = (XIMPreeditArea | XIMStatusArea);
	else if (!strcmp (s, "Root"))
	    input_style = (XIMPreeditNothing | XIMStatusNothing);
	for (i = 0; i < xim_styles->count_styles; i++)
	    if (input_style == xim_styles->supported_styles[i]) {
		found = 1;
		break;
	    }
    }
    XFree (xim_styles);
    if (found == 0) {
	xim_print_error ("input method doesn't support my preedit type");
	return 0;
    }
    if ((input_style != (XIMPreeditNothing | XIMStatusNothing))
	&& (input_style != (XIMPreeditArea | XIMStatusArea))
	&& (input_style != (XIMPreeditPosition | XIMStatusNothing))) {
	xim_print_error ("This program does not support the preedit type");
	return 0;
    }
    return input_style;
}

long create_input_context (CWidget * w, XIMStyle input_style)
{
    XVaNestedList preedit_attr = 0;
    XVaNestedList status_attr = 0;
    XPoint spot;
    XRectangle rect, status_rect, needed_rect;
    XIMCallback ximcallback;
    unsigned long fg, bg;
    if (w->kind != C_WINDOW_WIDGET)
	return 0;
    if (w->mainid)
	return 0;
    if (w->input_context)
	return 0;
    if (!CIM)
	return 1;
    if (!input_style)
	return 1;
    ximcallback.callback = IMDestroyCallback;
    ximcallback.client_data = NULL;
    if (input_style & XIMPreeditPosition) {
	setSize (w, &rect);
	setPosition (0, w, &spot);
	setColor (w, &fg, &bg);
	preedit_attr = XVaCreateNestedList (0, XNArea, &rect,
					    XNSpotLocation, &spot,
					    XNForeground, fg,
					    XNBackground, bg,
				       XNFontSet, current_font->font_set,
					    NULL);
    } else if (input_style & XIMPreeditArea) {
	setColor (w, &fg, &bg);
	/* 
	 * The necessary width of preedit area is unknown
	 * until create input context.
	 */
	needed_rect.width = 0;
	setPreeditArea (w, &rect, &status_rect, &needed_rect);
	preedit_attr = XVaCreateNestedList (0, XNArea, &rect,
					    XNForeground, fg,
					    XNBackground, bg,
				       XNFontSet, current_font->font_set,
					    NULL);
	status_attr = XVaCreateNestedList (0, XNArea, &status_rect,
					   XNForeground, fg,
					   XNBackground, bg,
				       XNFontSet, current_font->font_set,
					   NULL);
    }
    w->input_context = XCreateIC (CIM, XNInputStyle, input_style,
				  XNClientWindow, w->winid,
				  XNFocusWindow, w->winid,
				  XNDestroyCallback, &ximcallback,
			       preedit_attr ? XNPreeditAttributes : NULL,
				  preedit_attr,
				  status_attr ? XNStatusAttributes : NULL,
				  status_attr,
				  NULL);
    if (preedit_attr)
	XFree (preedit_attr);
    if (status_attr)
	XFree (status_attr);
    if (!w->input_context) {
	xim_print_error ("Failed to create input context for widget %s", w->ident);
	return 1;
    }
    return 0;
}

long set_status_position (CWidget * w)
{
    XIMStyle input_style;
    XRectangle preedit_rect, status_rect, *needed_rect = 0;
    XVaNestedList preedit_attr, status_attr;

    if (!w->input_context)
	return 0;

    XGetICValues (w->input_context, XNInputStyle, &input_style, NULL);

    if (input_style & XIMPreeditArea) {
	/* Getting the necessary width of preedit area */
	status_attr = XVaCreateNestedList (0, XNAreaNeeded, &needed_rect, NULL);
	XGetICValues (w->input_context, XNStatusAttributes, status_attr, NULL);
	XFree (status_attr);

	setPreeditArea (w, &preedit_rect, &status_rect, needed_rect);

	preedit_attr = XVaCreateNestedList (0, XNArea, &preedit_rect, NULL);
	status_attr = XVaCreateNestedList (0, XNArea, &status_rect, NULL);

	XSetICValues (w->input_context,
		      XNPreeditAttributes, preedit_attr,
		      XNStatusAttributes, status_attr, NULL);

	XFree (preedit_attr);
	XFree (status_attr);
    }
    return 0;
}


static void IMInstantiateCallback (Display * display, XPointer client_data, XPointer call_data)
{
    char *p;
    XIMStyle input_style = 0;
    XIMCallback ximcallback;

    if (CIC)
	return;

    ximcallback.callback = IMDestroyCallback;
    ximcallback.client_data = NULL;

#ifdef RXVT_SOURCE
    if (rs[Rs_inputMethod] && *rs[Rs_inputMethod]) {
	strncpy (tmp, option_imput_method, sizeof (tmp) - 1);
	for (s = tmp; *s; s = next_s + 1) {
	    for (; *s && isspace (*s); s++);
	    if (!*s)
		break;
	    for (end = s; (*end && (*end != ',')); end++);
	    for (next_s = end--; ((end >= s) && isspace (*end)); end--);
	    *(end + 1) = '\0';

	    if (*s) {
		strcpy (buf, "@im=");
		strncat (buf, s, sizeof (buf) - 4 - 1);
		if ((p = XSetLocaleModifiers (buf)) != NULL && *p
		 && (CIM = XOpenIM (CDisplay, NULL, NULL, NULL)) != NULL)
		    break;
	    }
	    if (!*next_s)
		break;
	}
    }
#endif

    /* try with XMODIFIERS env. var. */
    if (CIM == NULL && (p = XSetLocaleModifiers ("")) != NULL && *p)
	CIM = XOpenIM (CDisplay, NULL, NULL, NULL);

    /* try with XMODIFIERS env. var. */
    if (CIM == NULL && (p = XSetLocaleModifiers ("@im=control")) != NULL && *p)
	CIM = XOpenIM (CDisplay, NULL, NULL, NULL);

    /* try with no modifiers base */
    if (CIM == NULL && (p = XSetLocaleModifiers ("@im=none")) != NULL && *p)
	CIM = XOpenIM (CDisplay, NULL, NULL, NULL);

    if (!CIM)
	return;

/* got the Input Method, now set up all dialogs */

    XSetIMValues (CIM, XNDestroyCallback, &ximcallback, NULL);

    if (!(input_style = get_input_style ())) {
	XCloseIM (CIM);
	CIM = 0;
    }
    CPushFont ("editor", 0);
    if (for_all_widgets ((void *) create_input_context, (void *) input_style, 0)) {
	input_style = 0;
	XCloseIM (CIM);
	CIM = 0;
    }
    CPopFont ();
    if (input_style & XIMPreeditArea)
	for_all_widgets ((void *) set_status_position, 0, 0);
}

#else

int option_use_xim = 0;

KeySym key_sym_xlat (XEvent * ev, char *x_lat)
{
    static int len = 0;
    static KeySym keysym = 0;
    static XComposeStatus compose =
    {NULL, 0};
    static unsigned char kbuf[512] = "";
    static Time time = 0;
    static int valid_keysym = 1;
    Status status_return = 0;
    if (x_lat)
	*x_lat = '\0';
    if (ev->type != KeyPress && ev->type != KeyRelease)
	return 0;
/* we mustn't call this twice with the same event */
    if (time == ev->xkey.time)
	goto no_repeat_call;
    time = ev->xkey.time;
    keysym = 0;
    len = 0;
    if (ev->type == KeyRelease) {
	len = XLookupString (&ev->xkey, (char *) kbuf, sizeof (kbuf), &keysym, 0);
	if (!len && (keysym >= 0x0100) && (keysym < 0x0800)) {
	    len = 1;
	    kbuf[0] = (keysym & 0xFF);
	}
    } else {
	keysym = 0;
	len = XLookupString (&ev->xkey, (char *) kbuf, sizeof (kbuf), &keysym, &compose);
	if (!len && (keysym >= 0x0100) && (keysym < 0x0800)) {
	    len = 1;
	    kbuf[0] = (keysym & 0xFF);
	}
    }
  no_repeat_call:
    if (x_lat) {
	if (len > 0) {
	    if (len > 7)
		len = 7;
	    memcpy (x_lat, kbuf, len);
	    x_lat[len] = '\0';
	}
    }
    return valid_keysym ? keysym : 0;
}

#endif