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diff --git a/nx-X11/programs/xterm/doublechr.c b/nx-X11/programs/xterm/doublechr.c
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+/* $XTermId: doublechr.c,v 1.43 2005/08/05 01:25:39 tom Exp $ */
+
+/*
+ * $XFree86: xc/programs/xterm/doublechr.c,v 3.17 2005/08/05 01:25:39 dickey Exp $
+ */
+
+/************************************************************
+
+Copyright 1997-2004,2005 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 <assert.h>
+
+/*
+ * The first column is all that matters for double-size characters (since the
+ * controls apply to a whole line). However, it's easier to maintain the
+ * information for special fonts by writing to all cells.
+ */
+#define curChrSet SCRN_BUF_CSETS(screen, screen->cur_row)[0]
+
+#if OPT_DEC_CHRSET
+static void
+repaint_line(unsigned newChrSet)
+{
+ register TScreen *screen = &term->screen;
+ int curcol = screen->cur_col;
+ int currow = screen->cur_row;
+ unsigned len = MaxCols(screen);
+ int width = len;
+ unsigned oldChrSet = SCRN_BUF_CSETS(screen, currow)[0];
+
+ assert(width > 0);
+
+ /*
+ * Ignore repetition.
+ */
+ if (oldChrSet == newChrSet)
+ return;
+
+ TRACE(("repaint_line(%2d,%2d) (%d)\n", currow, screen->cur_col, newChrSet));
+ HideCursor();
+
+ /* If switching from single-width, keep the cursor in the visible part
+ * of the line.
+ */
+ if (CSET_DOUBLE(newChrSet)) {
+ width /= 2;
+ if (curcol > width)
+ curcol = width;
+ }
+
+ /*
+ * ScrnRefresh won't paint blanks for us if we're switching between a
+ * single-size and double-size font. So we paint our own.
+ */
+ if (CSET_DOUBLE(oldChrSet) != CSET_DOUBLE(newChrSet)) {
+ ClearCurBackground(screen,
+ CursorY(screen, currow),
+ CurCursorX(screen, currow, 0),
+ (unsigned) FontHeight(screen),
+ len * CurFontWidth(screen, currow));
+ }
+
+ /* FIXME: do VT220 softchars allow double-sizes? */
+ memset(SCRN_BUF_CSETS(screen, currow), (Char) newChrSet, len);
+
+ set_cur_col(screen, 0);
+ ScrnUpdate(screen, currow, 0, 1, (int) len, True);
+ set_cur_col(screen, curcol);
+}
+#endif
+
+/*
+ * Set the line to double-height characters. The 'top' flag denotes whether
+ * we'll be using it for the top (true) or bottom (false) of the line.
+ */
+void
+xterm_DECDHL(Bool top)
+{
+#if OPT_DEC_CHRSET
+ repaint_line((unsigned) (top ? CSET_DHL_TOP : CSET_DHL_BOT));
+#endif
+}
+
+/*
+ * Set the line to single-width characters (the normal state).
+ */
+void
+xterm_DECSWL(void)
+{
+#if OPT_DEC_CHRSET
+ repaint_line(CSET_SWL);
+#endif
+}
+
+/*
+ * Set the line to double-width characters
+ */
+void
+xterm_DECDWL(void)
+{
+#if OPT_DEC_CHRSET
+ repaint_line(CSET_DWL);
+#endif
+}
+
+#if OPT_DEC_CHRSET
+static void
+discard_font(TScreen * screen, XTermFonts * data)
+{
+ TRACE(("discard_font chrset=%d %s\n", data->chrset,
+ (data->fn != 0) ? data->fn : "<no-name>"));
+
+ data->chrset = 0;
+ data->flags = 0;
+ if (data->gc != 0) {
+ XFreeGC(screen->display, data->gc);
+ data->gc = 0;
+ }
+ if (data->fn != 0) {
+ free(data->fn);
+ data->fn = 0;
+ }
+ if (data->fs != 0) {
+ XFreeFont(screen->display, data->fs);
+ data->fs = 0;
+ }
+}
+
+int
+xterm_Double_index(unsigned chrset, unsigned flags)
+{
+ int n;
+ TScreen *screen = &term->screen;
+ XTermFonts *data = screen->double_fonts;
+
+ flags &= BOLD;
+ TRACE(("xterm_Double_index chrset=%#x, flags=%#x\n", chrset, flags));
+
+ for (n = 0; n < screen->fonts_used; n++) {
+ if (data[n].chrset == chrset
+ && data[n].flags == flags) {
+ if (n != 0) {
+ XTermFonts save;
+ TRACE(("...xterm_Double_index -> %d (OLD:%d)\n", n, screen->fonts_used));
+ save = data[n];
+ while (n > 0) {
+ data[n] = data[n - 1];
+ n--;
+ }
+ data[n] = save;
+ }
+ return n;
+ }
+ }
+
+ /* Not, found, push back existing fonts and create a new entry */
+ if (screen->fonts_used >= screen->cache_doublesize) {
+ TRACE(("...xterm_Double_index: discard oldest\n"));
+ discard_font(screen, &(data[screen->fonts_used - 1]));
+ } else {
+ screen->fonts_used += 1;
+ }
+ for (n = screen->fonts_used; n > 0; n--)
+ data[n] = data[n - 1];
+
+ TRACE(("...xterm_Double_index -> (NEW:%d)\n", screen->fonts_used));
+
+ data[0].chrset = chrset;
+ data[0].flags = flags;
+ data[0].fn = 0;
+ data[0].fs = 0;
+ data[0].gc = 0;
+ return 0;
+}
+
+/*
+ * Lookup/cache a GC for the double-size character display. We save up to
+ * NUM_CHRSET values.
+ */
+GC
+xterm_DoubleGC(unsigned chrset, unsigned flags, GC old_gc)
+{
+ XGCValues gcv;
+ register TScreen *screen = &term->screen;
+ unsigned long mask = (GCForeground | GCBackground | GCFont);
+ int n;
+ char *name;
+ XTermFonts *data;
+
+ if ((name = xtermSpecialFont(screen, flags, chrset)) == 0)
+ return 0;
+
+ n = xterm_Double_index(chrset, flags);
+ data = &(screen->double_fonts[n]);
+ if (data->fn != 0) {
+ if (!strcmp(data->fn, name)) {
+ if (data->fs != 0) {
+ XCopyGC(screen->display, old_gc, (unsigned long) (~GCFont), data->gc);
+ return data->gc;
+ }
+ }
+ discard_font(screen, data);
+ data->chrset = chrset;
+ data->flags = flags & BOLD;
+ }
+ data->fn = name;
+
+ TRACE(("xterm_DoubleGC %s %d: %s\n", flags & BOLD ? "BOLD" : "NORM", n, name));
+
+ if ((data->fs = XLoadQueryFont(screen->display, name)) == 0) {
+ /* Retry with * in resolutions */
+ char *nname = xtermSpecialFont(screen, flags | NORESOLUTION, chrset);
+
+ if (!nname)
+ return 0;
+ if ((data->fs = XLoadQueryFont(screen->display, nname)) == 0) {
+ XtFree(nname);
+ return 0;
+ }
+ XtFree(name);
+ data->fn = nname;
+ }
+
+ TRACE(("-> OK\n"));
+
+ gcv.graphics_exposures = TRUE; /* default */
+ gcv.font = data->fs->fid;
+ gcv.foreground = T_COLOR(screen, TEXT_FG);
+ gcv.background = T_COLOR(screen, TEXT_BG);
+
+ data->gc = XCreateGC(screen->display, VWindow(screen), mask, &gcv);
+ XCopyGC(screen->display, old_gc, (unsigned long) (~GCFont), data->gc);
+ return data->gc;
+}
+#endif
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