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+/* $XTermId: charsets.c,v 1.32 2005/01/14 01:50:02 tom Exp $ */
+
+/*
+ * $XFree86: xc/programs/xterm/charsets.c,v 1.12 2005/01/14 01:50:02 dickey Exp $
+ */
+
+/************************************************************
+
+Copyright 1998-2003,2005 by Thomas E. Dickey
+
+ All Rights Reserved
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name(s) of the above copyright
+holders shall not be used in advertising or otherwise to promote the
+sale, use or other dealings in this Software without prior written
+authorization.
+
+********************************************************/
+
+#include <xterm.h>
+#include <data.h>
+#include <fontutils.h>
+
+#include <X11/keysym.h>
+
+/*
+ * This module performs translation as needed to support the DEC VT220 national
+ * replacement character sets. We assume that xterm's font is based on the ISO
+ * 8859-1 (Latin 1) character set, which is almost the same as the DEC
+ * multinational character set. Glyph positions 0-31 have to be the DEC
+ * graphic characters, though.
+ *
+ * References:
+ * "VT220 Programmer Pocket Guide" EK-VT220-HR-002 (2nd ed., 1984), which
+ * contains character charts for the national character sets.
+ * "VT330/VT340 Programmer Reference Manual Volume 1: Text Programming"
+ * EK-VT3XX-TP-001 (1st ed, 1987), which contains a table (2-1)
+ * listing the glyphs which are mapped from the multinational
+ * character set to the national character set.
+ *
+ * The latter reference, though easier to read, has a few errors and omissions.
+ */
+
+/*
+ * Translate an input keysym to the corresponding NRC keysym.
+ */
+unsigned xtermCharSetIn(unsigned code, int charset)
+{
+ if (code >= 128 && code < 256) {
+ switch (charset) {
+ case 'A': /* United Kingdom set (or Latin 1) */
+ if (code == XK_sterling)
+ code = 0x23;
+ code &= 0x7f;
+ break;
+
+#if OPT_XMC_GLITCH
+ case '?':
+#endif
+ case '1': /* Alternate Character ROM standard characters */
+ case '2': /* Alternate Character ROM special graphics */
+ case 'B': /* ASCII set */
+ break;
+
+ case '0': /* special graphics (line drawing) */
+ break;
+
+ case '4': /* Dutch */
+ switch (code) {
+ case XK_sterling: code = 0x23; break;
+ case XK_threequarters: code = 0x40; break;
+ case XK_ydiaeresis: code = 0x5b; break;
+ case XK_onehalf: code = 0x5c; break;
+ /* N/A case XK_bar: code = 0x5d; break; */
+ case XK_diaeresis: code = 0x7b; break;
+ /* N/A case XK_f: code = 0x7c; break; */
+ case XK_onequarter: code = 0x7d; break;
+ case XK_acute: code = 0x7e; break;
+ }
+ break;
+
+ case 'C':
+ case '5': /* Finnish */
+ switch (code) {
+ case XK_Adiaeresis: code = 0x5b; break;
+ case XK_Odiaeresis: code = 0x5c; break;
+ case XK_Aring: code = 0x5d; break;
+ case XK_Udiaeresis: code = 0x5e; break;
+ case XK_eacute: code = 0x60; break;
+ case XK_adiaeresis: code = 0x7b; break;
+ case XK_odiaeresis: code = 0x7c; break;
+ case XK_aring: code = 0x7d; break;
+ case XK_udiaeresis: code = 0x7e; break;
+ }
+ break;
+
+ case 'R': /* French */
+ switch (code) {
+ case XK_sterling: code = 0x23; break;
+ case XK_agrave: code = 0x40; break;
+ case XK_degree: code = 0x5b; break;
+ case XK_ccedilla: code = 0x5c; break;
+ case XK_section: code = 0x5d; break;
+ case XK_eacute: code = 0x7b; break;
+ case XK_ugrave: code = 0x7c; break;
+ case XK_egrave: code = 0x7d; break;
+ case XK_diaeresis: code = 0x7e; break;
+ }
+ break;
+
+ case 'Q': /* French Canadian */
+ switch (code) {
+ case XK_agrave: code = 0x40; break;
+ case XK_acircumflex: code = 0x5b; break;
+ case XK_ccedilla: code = 0x5c; break;
+ case XK_ecircumflex: code = 0x5d; break;
+ case XK_icircumflex: code = 0x5e; break;
+ case XK_ocircumflex: code = 0x60; break;
+ case XK_eacute: code = 0x7b; break;
+ case XK_ugrave: code = 0x7c; break;
+ case XK_egrave: code = 0x7d; break;
+ case XK_ucircumflex: code = 0x7e; break;
+ }
+ break;
+
+ case 'K': /* German */
+ switch (code) {
+ case XK_section: code = 0x40; break;
+ case XK_Adiaeresis: code = 0x5b; break;
+ case XK_Odiaeresis: code = 0x5c; break;
+ case XK_Udiaeresis: code = 0x5d; break;
+ case XK_adiaeresis: code = 0x7b; break;
+ case XK_odiaeresis: code = 0x7c; break;
+ case XK_udiaeresis: code = 0x7d; break;
+ case XK_ssharp: code = 0x7e; break;
+ }
+ break;
+
+ case 'Y': /* Italian */
+ switch (code) {
+ case XK_sterling: code = 0x23; break;
+ case XK_section: code = 0x40; break;
+ case XK_degree: code = 0x5b; break;
+ case XK_ccedilla: code = 0x5c; break;
+ case XK_eacute: code = 0x5d; break;
+ case XK_ugrave: code = 0x60; break;
+ case XK_agrave: code = 0x7b; break;
+ case XK_ograve: code = 0x7c; break;
+ case XK_egrave: code = 0x7d; break;
+ case XK_igrave: code = 0x7e; break;
+ }
+ break;
+
+ case 'E':
+ case '6': /* Norwegian/Danish */
+ switch (code) {
+ case XK_Adiaeresis: code = 0x40; break;
+ case XK_AE: code = 0x5b; break;
+ case XK_Ooblique: code = 0x5c; break;
+ case XK_Aring: code = 0x5d; break;
+ case XK_Udiaeresis: code = 0x5e; break;
+ case XK_adiaeresis: code = 0x60; break;
+ case XK_ae: code = 0x7b; break;
+ case XK_oslash: code = 0x7c; break;
+ case XK_aring: code = 0x7d; break;
+ case XK_udiaeresis: code = 0x7e; break;
+ }
+ break;
+
+ case 'Z': /* Spanish */
+ switch (code) {
+ case XK_sterling: code = 0x23; break;
+ case XK_section: code = 0x40; break;
+ case XK_exclamdown: code = 0x5b; break;
+ case XK_Ntilde: code = 0x5c; break;
+ case XK_questiondown: code = 0x5d; break;
+ case XK_degree: code = 0x7b; break;
+ case XK_ntilde: code = 0x7c; break;
+ case XK_ccedilla: code = 0x7d; break;
+ }
+ break;
+
+ case 'H':
+ case '7': /* Swedish */
+ switch (code) {
+ case XK_Eacute: code = 0x40; break;
+ case XK_Adiaeresis: code = 0x5b; break;
+ case XK_Odiaeresis: code = 0x5c; break;
+ case XK_Aring: code = 0x5d; break;
+ case XK_Udiaeresis: code = 0x5e; break;
+ case XK_eacute: code = 0x60; break;
+ case XK_adiaeresis: code = 0x7b; break;
+ case XK_odiaeresis: code = 0x7c; break;
+ case XK_aring: code = 0x7d; break;
+ case XK_udiaeresis: code = 0x7e; break;
+ }
+ break;
+
+ case '=': /* Swiss */
+ switch (code) {
+ case XK_ugrave: code = 0x23; break;
+ case XK_agrave: code = 0x40; break;
+ case XK_eacute: code = 0x5b; break;
+ case XK_ccedilla: code = 0x5c; break;
+ case XK_ecircumflex: code = 0x5d; break;
+ case XK_icircumflex: code = 0x5e; break;
+ case XK_egrave: code = 0x5f; break;
+ case XK_ocircumflex: code = 0x60; break;
+ case XK_adiaeresis: code = 0x7b; break;
+ case XK_odiaeresis: code = 0x7c; break;
+ case XK_udiaeresis: code = 0x7d; break;
+ case XK_ucircumflex: code = 0x7e; break;
+ }
+ break;
+
+ default: /* any character sets we don't recognize*/
+ break;
+ }
+ code &= 0x7f; /* NRC in any case is 7-bit */
+ }
+ return code;
+}
+
+/*
+ * Translate a string to the display form. This assumes the font has the
+ * DEC graphic characters in cells 0-31, and otherwise is ISO-8859-1.
+ */
+int xtermCharSetOut(IChar *buf, IChar *ptr, int leftset)
+{
+ IChar *s;
+ register TScreen *screen = &term->screen;
+ int count = 0;
+ int rightset = screen->gsets[(int)(screen->curgr)];
+
+ TRACE(("CHARSET GL=%c(G%d) GR=%c(G%d) SS%d:%s\n",
+ leftset, screen->curgl,
+ rightset, screen->curgr,
+ screen->curss,
+ visibleIChar(buf, (unsigned)(ptr - buf))));
+
+ for (s = buf; s < ptr; ++s) {
+ int eight = CharOf(E2A(*s));
+ int seven = eight & 0x7f;
+ int cs = (eight >= 128) ? rightset : leftset;
+ int chr = eight;
+
+ count++;
+ switch (cs) {
+ case 'A': /* United Kingdom set (or Latin 1) */
+ if ((term->flags & NATIONAL)
+ || (screen->vtXX_level <= 1)) {
+ if (chr == 0x23)
+ chr = XPOUND; /* UK pound sign*/
+ } else {
+ chr = (seven | 0x80);
+ }
+ break;
+
+#if OPT_XMC_GLITCH
+ case '?':
+#endif
+ case '1': /* Alternate Character ROM standard characters */
+ case '2': /* Alternate Character ROM special graphics */
+ case 'B': /* ASCII set */
+ break;
+
+ case '0': /* special graphics (line drawing) */
+ if (seven > 0x5f && seven <= 0x7e) {
+#if OPT_WIDE_CHARS
+ if (screen->utf8_mode)
+ chr = dec2ucs((unsigned)(seven - 0x5f));
+ else
+#endif
+ chr = seven - 0x5f;
+ } else {
+ chr = seven;
+ }
+ break;
+
+ case '4': /* Dutch */
+ switch (chr = seven) {
+ case 0x23: chr = XK_sterling; break;
+ case 0x40: chr = XK_threequarters; break;
+ case 0x5b: chr = XK_ydiaeresis; break;
+ case 0x5c: chr = XK_onehalf; break;
+ case 0x5d: chr = XK_bar; break;
+ case 0x7b: chr = XK_diaeresis; break;
+ case 0x7c: chr = XK_f; break;
+ case 0x7d: chr = XK_onequarter; break;
+ case 0x7e: chr = XK_acute; break;
+ }
+ break;
+
+ case 'C':
+ case '5': /* Finnish */
+ switch (chr = seven) {
+ case 0x5b: chr = XK_Adiaeresis; break;
+ case 0x5c: chr = XK_Odiaeresis; break;
+ case 0x5d: chr = XK_Aring; break;
+ case 0x5e: chr = XK_Udiaeresis; break;
+ case 0x60: chr = XK_eacute; break;
+ case 0x7b: chr = XK_adiaeresis; break;
+ case 0x7c: chr = XK_odiaeresis; break;
+ case 0x7d: chr = XK_aring; break;
+ case 0x7e: chr = XK_udiaeresis; break;
+ }
+ break;
+
+ case 'R': /* French */
+ switch (chr = seven) {
+ case 0x23: chr = XK_sterling; break;
+ case 0x40: chr = XK_agrave; break;
+ case 0x5b: chr = XK_degree; break;
+ case 0x5c: chr = XK_ccedilla; break;
+ case 0x5d: chr = XK_section; break;
+ case 0x7b: chr = XK_eacute; break;
+ case 0x7c: chr = XK_ugrave; break;
+ case 0x7d: chr = XK_egrave; break;
+ case 0x7e: chr = XK_diaeresis; break;
+ }
+ break;
+
+ case 'Q': /* French Canadian */
+ switch (chr = seven) {
+ case 0x40: chr = XK_agrave; break;
+ case 0x5b: chr = XK_acircumflex; break;
+ case 0x5c: chr = XK_ccedilla; break;
+ case 0x5d: chr = XK_ecircumflex; break;
+ case 0x5e: chr = XK_icircumflex; break;
+ case 0x60: chr = XK_ocircumflex; break;
+ case 0x7b: chr = XK_eacute; break;
+ case 0x7c: chr = XK_ugrave; break;
+ case 0x7d: chr = XK_egrave; break;
+ case 0x7e: chr = XK_ucircumflex; break;
+ }
+ break;
+
+ case 'K': /* German */
+ switch (chr = seven) {
+ case 0x40: chr = XK_section; break;
+ case 0x5b: chr = XK_Adiaeresis; break;
+ case 0x5c: chr = XK_Odiaeresis; break;
+ case 0x5d: chr = XK_Udiaeresis; break;
+ case 0x7b: chr = XK_adiaeresis; break;
+ case 0x7c: chr = XK_odiaeresis; break;
+ case 0x7d: chr = XK_udiaeresis; break;
+ case 0x7e: chr = XK_ssharp; break;
+ }
+ break;
+
+ case 'Y': /* Italian */
+ switch (chr = seven) {
+ case 0x23: chr = XK_sterling; break;
+ case 0x40: chr = XK_section; break;
+ case 0x5b: chr = XK_degree; break;
+ case 0x5c: chr = XK_ccedilla; break;
+ case 0x5d: chr = XK_eacute; break;
+ case 0x60: chr = XK_ugrave; break;
+ case 0x7b: chr = XK_agrave; break;
+ case 0x7c: chr = XK_ograve; break;
+ case 0x7d: chr = XK_egrave; break;
+ case 0x7e: chr = XK_igrave; break;
+ }
+ break;
+
+ case 'E':
+ case '6': /* Norwegian/Danish */
+ switch (chr = seven) {
+ case 0x40: chr = XK_Adiaeresis; break;
+ case 0x5b: chr = XK_AE; break;
+ case 0x5c: chr = XK_Ooblique; break;
+ case 0x5d: chr = XK_Aring; break;
+ case 0x5e: chr = XK_Udiaeresis; break;
+ case 0x60: chr = XK_adiaeresis; break;
+ case 0x7b: chr = XK_ae; break;
+ case 0x7c: chr = XK_oslash; break;
+ case 0x7d: chr = XK_aring; break;
+ case 0x7e: chr = XK_udiaeresis; break;
+ }
+ break;
+
+ case 'Z': /* Spanish */
+ switch (chr = seven) {
+ case 0x23: chr = XK_sterling; break;
+ case 0x40: chr = XK_section; break;
+ case 0x5b: chr = XK_exclamdown; break;
+ case 0x5c: chr = XK_Ntilde; break;
+ case 0x5d: chr = XK_questiondown; break;
+ case 0x7b: chr = XK_degree; break;
+ case 0x7c: chr = XK_ntilde; break;
+ case 0x7d: chr = XK_ccedilla; break;
+ }
+ break;
+
+ case 'H':
+ case '7': /* Swedish */
+ switch (chr = seven) {
+ case 0x40: chr = XK_Eacute; break;
+ case 0x5b: chr = XK_Adiaeresis; break;
+ case 0x5c: chr = XK_Odiaeresis; break;
+ case 0x5d: chr = XK_Aring; break;
+ case 0x5e: chr = XK_Udiaeresis; break;
+ case 0x60: chr = XK_eacute; break;
+ case 0x7b: chr = XK_adiaeresis; break;
+ case 0x7c: chr = XK_odiaeresis; break;
+ case 0x7d: chr = XK_aring; break;
+ case 0x7e: chr = XK_udiaeresis; break;
+ }
+ break;
+
+ case '=': /* Swiss */
+ switch (chr = seven) {
+ case 0x23: chr = XK_ugrave; break;
+ case 0x40: chr = XK_agrave; break;
+ case 0x5b: chr = XK_eacute; break;
+ case 0x5c: chr = XK_ccedilla; break;
+ case 0x5d: chr = XK_ecircumflex; break;
+ case 0x5e: chr = XK_icircumflex; break;
+ case 0x5f: chr = XK_egrave; break;
+ case 0x60: chr = XK_ocircumflex; break;
+ case 0x7b: chr = XK_adiaeresis; break;
+ case 0x7c: chr = XK_odiaeresis; break;
+ case 0x7d: chr = XK_udiaeresis; break;
+ case 0x7e: chr = XK_ucircumflex; break;
+ }
+ break;
+
+ default: /* any character sets we don't recognize*/
+ count --;
+ break;
+ }
+ /*
+ * The state machine already treated DEL as a nonprinting and
+ * nonspacing character. If we have DEL now, simply render
+ * it as a blank.
+ */
+ if (chr == 0x7f)
+ chr = ' ';
+ *s = A2E(chr);
+ }
+ return count;
+}
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