Adding upstream version 3:4.8.29.upstream/3%4.8.29upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

26 files changed, 8015 insertions, 0 deletions

diff --git a/lib/tty/Makefile.am b/lib/tty/Makefile.am
new file mode 100644
index 0000000..d4260fe
--- /dev/null
+++ b/lib/tty/Makefile.am
@@ -0,0 +1,36 @@
+
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+
+if USE_SCREEN_SLANG
+    TTY_SCREEN_SRC = \
+	color-slang.c color-slang.h \
+	tty-slang.c tty-slang.h
+else
+    TTY_SCREEN_SRC = \
+	color-ncurses.c \
+	tty-ncurses.c tty-ncurses.h
+endif
+
+TTY_SRC = \
+	color-internal.c color-internal.h \
+	color.c color.h \
+	key.c key.h keyxdef.c \
+	mouse.c mouse.h \
+	tty-internal.c tty-internal.h \
+	tty.c tty.h \
+	win.c win.h
+
+if HAVE_TEXTMODE_X11_SUPPORT
+TTY_SRC += x11conn.c x11conn.h
+endif
+
+libmctty_la_SOURCES = $(TTY_SRC) $(TTY_SCREEN_SRC)
+
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+
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+endif
+
diff --git a/lib/tty/Makefile.in b/lib/tty/Makefile.in
new file mode 100644
index 0000000..bf37a36
--- /dev/null
+++ b/lib/tty/Makefile.in
@@ -0,0 +1,800 @@
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+@USE_SCREEN_SLANG_FALSE@	color-ncurses.c \
+@USE_SCREEN_SLANG_FALSE@	tty-ncurses.c tty-ncurses.h
+
+@USE_SCREEN_SLANG_TRUE@TTY_SCREEN_SRC = \
+@USE_SCREEN_SLANG_TRUE@	color-slang.c color-slang.h \
+@USE_SCREEN_SLANG_TRUE@	tty-slang.c tty-slang.h
+
+TTY_SRC = color-internal.c color-internal.h color.c color.h key.c \
+	key.h keyxdef.c mouse.c mouse.h tty-internal.c tty-internal.h \
+	tty.c tty.h win.c win.h $(am__append_1)
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+
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+	      exit 1;; \
+	  esac; \
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+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu lib/tty/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu lib/tty/Makefile
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+	locs=`for p in $$list; do echo $$p; done | \
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+	test -z "$$locs" || { \
+	  echo rm -f $${locs}; \
+	  rm -f $${locs}; \
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+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
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+	esac; \
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+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
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+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
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+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
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+maintainer-clean-generic:
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+clean-am: clean-generic clean-libtool clean-noinstLTLIBRARIES \
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+distclean: distclean-am
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+	-rm -f ./$(DEPDIR)/color.Plo
+	-rm -f ./$(DEPDIR)/key.Plo
+	-rm -f ./$(DEPDIR)/keyxdef.Plo
+	-rm -f ./$(DEPDIR)/mouse.Plo
+	-rm -f ./$(DEPDIR)/tty-internal.Plo
+	-rm -f ./$(DEPDIR)/tty-ncurses.Plo
+	-rm -f ./$(DEPDIR)/tty-slang.Plo
+	-rm -f ./$(DEPDIR)/tty.Plo
+	-rm -f ./$(DEPDIR)/win.Plo
+	-rm -f ./$(DEPDIR)/x11conn.Plo
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+		-rm -f ./$(DEPDIR)/color-internal.Plo
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+	-rm -f ./$(DEPDIR)/color.Plo
+	-rm -f ./$(DEPDIR)/key.Plo
+	-rm -f ./$(DEPDIR)/keyxdef.Plo
+	-rm -f ./$(DEPDIR)/mouse.Plo
+	-rm -f ./$(DEPDIR)/tty-internal.Plo
+	-rm -f ./$(DEPDIR)/tty-ncurses.Plo
+	-rm -f ./$(DEPDIR)/tty-slang.Plo
+	-rm -f ./$(DEPDIR)/tty.Plo
+	-rm -f ./$(DEPDIR)/win.Plo
+	-rm -f ./$(DEPDIR)/x11conn.Plo
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+	cscopelist-am ctags ctags-am distclean distclean-compile \
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+.PRECIOUS: Makefile
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/lib/tty/color-internal.c b/lib/tty/color-internal.c
new file mode 100644
index 0000000..a877143
--- /dev/null
+++ b/lib/tty/color-internal.c
@@ -0,0 +1,242 @@
+/*
+   Internal stuff of color setup
+
+   Copyright (C) 1994-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Andrew Borodin <aborodin@vmail.ru>, 2009
+   Slava Zanko <slavazanko@gmail.com>, 2009, 2013
+   Egmont Koblinger <egmont@gmail.com>, 2010
+
+   This file is part of the Midnight Commander.
+
+   The Midnight Commander is free software: you can redistribute it
+   and/or modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   The Midnight Commander 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file color-internal.c
+ *  \brief Source: Internal stuff of color setup
+ */
+
+#include <config.h>
+
+#include <string.h>             /* strcmp */
+
+#include "color.h"              /* colors and attributes */
+#include "color-internal.h"
+
+/*** global variables ****************************************************************************/
+
+gboolean mc_tty_color_disable;
+
+/*** file scope macro definitions ****************************************************************/
+
+#define COLOR_INTENSITY 8
+
+/*** file scope type declarations ****************************************************************/
+
+typedef struct mc_tty_color_table_struct
+{
+    const char *name;
+    int value;
+} mc_tty_color_table_t;
+
+/*** file scope variables ************************************************************************/
+
+static mc_tty_color_table_t const color_table[] = {
+    {"black", COLOR_BLACK},
+    {"gray", COLOR_BLACK + COLOR_INTENSITY},
+    {"red", COLOR_RED},
+    {"brightred", COLOR_RED + COLOR_INTENSITY},
+    {"green", COLOR_GREEN},
+    {"brightgreen", COLOR_GREEN + COLOR_INTENSITY},
+    {"brown", COLOR_YELLOW},
+    {"yellow", COLOR_YELLOW + COLOR_INTENSITY},
+    {"blue", COLOR_BLUE},
+    {"brightblue", COLOR_BLUE + COLOR_INTENSITY},
+    {"magenta", COLOR_MAGENTA},
+    {"brightmagenta", COLOR_MAGENTA + COLOR_INTENSITY},
+    {"cyan", COLOR_CYAN},
+    {"brightcyan", COLOR_CYAN + COLOR_INTENSITY},
+    {"lightgray", COLOR_WHITE},
+    {"white", COLOR_WHITE + COLOR_INTENSITY},
+    {"default", -1},            /* default color of the terminal */
+    /* special colors */
+    {"A_REVERSE", SPEC_A_REVERSE},
+    {"A_BOLD", SPEC_A_BOLD},
+    {"A_BOLD_REVERSE", SPEC_A_BOLD_REVERSE},
+    {"A_UNDERLINE", SPEC_A_UNDERLINE},
+    /* End of list */
+    {NULL, 0}
+};
+
+static mc_tty_color_table_t const attributes_table[] = {
+    {"bold", A_BOLD},
+#ifdef A_ITALIC                 /* available since ncurses-5.9-20130831 / slang-pre2.3.0-107 */
+    {"italic", A_ITALIC},
+#endif /* A_ITALIC */
+    {"underline", A_UNDERLINE},
+    {"reverse", A_REVERSE},
+    {"blink", A_BLINK},
+    /* End of list */
+    {NULL, 0}
+};
+
+/* --------------------------------------------------------------------------------------------- */
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+static inline int
+parse_hex_digit (char c)
+{
+    if (c >= '0' && c <= '9')
+        return c - '0';
+    c |= 0x20;
+    if (c >= 'a' && c <= 'f')
+        return c - 'a' + 10;
+    return -1;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+parse_256_or_true_color_name (const char *color_name)
+{
+    int i;
+    char dummy;
+
+    /* cppcheck-suppress invalidscanf */
+    if (sscanf (color_name, "color%d%c", &i, &dummy) == 1 && i >= 0 && i < 256)
+    {
+        return i;
+    }
+    /* cppcheck-suppress invalidscanf */
+    if (sscanf (color_name, "gray%d%c", &i, &dummy) == 1 && i >= 0 && i < 24)
+    {
+        return 232 + i;
+    }
+    if (strncmp (color_name, "rgb", 3) == 0 &&
+        color_name[3] >= '0' && color_name[3] < '6' &&
+        color_name[4] >= '0' && color_name[4] < '6' &&
+        color_name[5] >= '0' && color_name[5] < '6' && color_name[6] == '\0')
+    {
+        return 16 + 36 * (color_name[3] - '0') + 6 * (color_name[4] - '0') + (color_name[5] - '0');
+    }
+    if (color_name[0] == '#')
+    {
+        int len;
+
+        color_name++;
+        len = (int) strlen (color_name);
+        if (len == 3 || len == 6)
+        {
+            int h[6];
+
+            for (i = 0; i < len; i++)
+            {
+                h[i] = parse_hex_digit (color_name[i]);
+                if (h[i] == -1)
+                    return -1;
+            }
+
+            if (i == 3)
+                i = (h[0] << 20) | (h[0] << 16) | (h[1] << 12) | (h[1] << 8) | (h[2] << 4) | h[2];
+            else
+                i = (h[0] << 20) | (h[1] << 16) | (h[2] << 12) | (h[3] << 8) | (h[4] << 4) | h[5];
+            return (1 << 24) | i;
+        }
+    }
+
+    return -1;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+const char *
+tty_color_get_name_by_index (int idx)
+{
+    int i;
+
+    /* Find the real English name of the first 16 colors, */
+    /* as well as the A_* special values. */
+    for (i = 0; color_table[i].name != NULL; i++)
+        if (idx == color_table[i].value)
+            return color_table[i].name;
+
+    /* Create and return the strings in "colorNNN" or "#rrggbb" format. */
+    if ((idx >= 16 && idx < 256) || (idx & (1 << 24)) != 0)
+    {
+        char name[9];
+
+        if (idx < 256)
+            sprintf (name, "color%d", idx);
+        else
+            sprintf (name, "#%06X", (unsigned int) idx & 0xFFFFFF);
+        return g_intern_string (name);
+    }
+    return "default";
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+int
+tty_color_get_index_by_name (const char *color_name)
+{
+    if (color_name != NULL)
+    {
+        size_t i;
+
+        for (i = 0; color_table[i].name != NULL; i++)
+            if (strcmp (color_name, color_table[i].name) == 0)
+                return color_table[i].value;
+        return parse_256_or_true_color_name (color_name);
+    }
+    return -1;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+int
+tty_attr_get_bits (const char *attrs)
+{
+    int attr_bits = 0;
+
+    if (attrs != NULL)
+    {
+        gchar **attr_list;
+        int i;
+
+        attr_list = g_strsplit (attrs, "+", -1);
+
+        for (i = 0; attr_list[i] != NULL; i++)
+        {
+            int j;
+
+            for (j = 0; attributes_table[j].name != NULL; j++)
+            {
+                if (strcmp (attr_list[i], attributes_table[j].name) == 0)
+                {
+                    attr_bits |= attributes_table[j].value;
+                    break;
+                }
+            }
+        }
+        g_strfreev (attr_list);
+    }
+    return attr_bits;
+}
+
+/* --------------------------------------------------------------------------------------------- */
diff --git a/lib/tty/color-internal.h b/lib/tty/color-internal.h
new file mode 100644
index 0000000..dc85225
--- /dev/null
+++ b/lib/tty/color-internal.h
@@ -0,0 +1,61 @@
+
+/** \file color-internal.h
+ *  \brief Header: Internal stuff of color setup
+ */
+
+#ifndef MC__COLOR_INTERNAL_H
+#define MC__COLOR_INTERNAL_H
+
+#include <sys/types.h>          /* size_t */
+
+#include "lib/global.h"
+
+#ifdef HAVE_SLANG
+#include "tty-slang.h"
+#else
+#include "tty-ncurses.h"
+#endif /* HAVE_SLANG */
+
+/*** typedefs(not structures) and defined constants **********************************************/
+
+/*** enums ***************************************************************************************/
+
+/* *INDENT-OFF* */
+typedef enum {
+    SPEC_A_REVERSE              = -100,
+    SPEC_A_BOLD                 = -101,
+    SPEC_A_BOLD_REVERSE         = -102,
+    SPEC_A_UNDERLINE            = -103
+} tty_special_color_t;
+/* *INDENT-ON* */
+
+/*** structures declarations (and typedefs of structures)*****************************************/
+
+typedef struct mc_color_pair_struct
+{
+    int ifg;
+    int ibg;
+    int attr;
+    size_t pair_index;
+    gboolean is_temp;
+} tty_color_pair_t;
+
+/*** global variables defined in .c file *********************************************************/
+
+extern gboolean use_colors;
+extern gboolean mc_tty_color_disable;
+
+/*** declarations of public functions ************************************************************/
+
+const char *tty_color_get_name_by_index (int idx);
+int tty_color_get_index_by_name (const char *color_name);
+int tty_attr_get_bits (const char *attrs);
+
+void tty_color_init_lib (gboolean disable, gboolean force);
+void tty_color_deinit_lib (void);
+
+void tty_color_try_alloc_pair_lib (tty_color_pair_t * mc_color_pair);
+
+/*** inline functions ****************************************************************************/
+
+#endif /* MC__COLOR_INTERNAL_H */
diff --git a/lib/tty/color-ncurses.c b/lib/tty/color-ncurses.c
new file mode 100644
index 0000000..697ab98
--- /dev/null
+++ b/lib/tty/color-ncurses.c
@@ -0,0 +1,248 @@
+/*
+   Color setup for NCurses screen library
+
+   Copyright (C) 1994-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Andrew Borodin <aborodin@vmail.ru>, 2009
+   Slava Zanko <slavazanko@gmail.com>, 2010
+   Egmont Koblinger <egmont@gmail.com>, 2010
+
+   This file is part of the Midnight Commander.
+
+   The Midnight Commander is free software: you can redistribute it
+   and/or modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   The Midnight Commander 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file color-ncurses.c
+ *  \brief Source: NCUrses-specific color setup
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>          /* size_t */
+
+#include "lib/global.h"
+
+#include "tty-ncurses.h"
+#include "color.h"              /* variables */
+#include "color-internal.h"
+
+/*** global variables ****************************************************************************/
+
+/*** file scope macro definitions ****************************************************************/
+
+/*** file scope type declarations ****************************************************************/
+
+/*** file scope variables ************************************************************************/
+
+static GHashTable *mc_tty_color_color_pair_attrs = NULL;
+
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+static inline void
+mc_tty_color_attr_destroy_cb (gpointer data)
+{
+    g_free (data);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+mc_tty_color_save_attr (int color_pair, int color_attr)
+{
+    int *attr, *key;
+
+    attr = g_try_new0 (int, 1);
+    if (attr == NULL)
+        return;
+
+    key = g_try_new (int, 1);
+    if (key == NULL)
+    {
+        g_free (attr);
+        return;
+    }
+
+    *key = color_pair;
+    *attr = color_attr;
+
+    g_hash_table_replace (mc_tty_color_color_pair_attrs, (gpointer) key, (gpointer) attr);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+color_get_attr (int color_pair)
+{
+    int *fnd = NULL;
+
+    if (mc_tty_color_color_pair_attrs != NULL)
+        fnd = (int *) g_hash_table_lookup (mc_tty_color_color_pair_attrs, (gpointer) & color_pair);
+    return (fnd != NULL) ? *fnd : 0;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+mc_tty_color_pair_init_special (tty_color_pair_t * mc_color_pair,
+                                int fg1, int bg1, int fg2, int bg2, int attr)
+{
+    if (has_colors () && !mc_tty_color_disable)
+        init_pair (mc_color_pair->pair_index, fg1, bg1);
+    else
+        init_pair (mc_color_pair->pair_index, fg2, bg2);
+    mc_tty_color_save_attr (mc_color_pair->pair_index, attr);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_color_init_lib (gboolean disable, gboolean force)
+{
+    (void) force;
+
+    if (has_colors () && !disable)
+    {
+        use_colors = TRUE;
+        start_color ();
+        use_default_colors ();
+    }
+
+    mc_tty_color_color_pair_attrs = g_hash_table_new_full
+        (g_int_hash, g_int_equal, mc_tty_color_attr_destroy_cb, mc_tty_color_attr_destroy_cb);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_color_deinit_lib (void)
+{
+    g_hash_table_destroy (mc_tty_color_color_pair_attrs);
+    mc_tty_color_color_pair_attrs = NULL;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_color_try_alloc_pair_lib (tty_color_pair_t * mc_color_pair)
+{
+    if (mc_color_pair->ifg <= (int) SPEC_A_REVERSE)
+    {
+        switch (mc_color_pair->ifg)
+        {
+        case SPEC_A_REVERSE:
+            mc_tty_color_pair_init_special (mc_color_pair,
+                                            COLOR_BLACK, COLOR_WHITE,
+                                            COLOR_BLACK, COLOR_WHITE | A_BOLD, A_REVERSE);
+            break;
+        case SPEC_A_BOLD:
+            mc_tty_color_pair_init_special (mc_color_pair,
+                                            COLOR_WHITE, COLOR_BLACK,
+                                            COLOR_WHITE, COLOR_BLACK, A_BOLD);
+            break;
+        case SPEC_A_BOLD_REVERSE:
+            mc_tty_color_pair_init_special (mc_color_pair,
+                                            COLOR_WHITE, COLOR_WHITE,
+                                            COLOR_WHITE, COLOR_WHITE, A_BOLD | A_REVERSE);
+            break;
+        case SPEC_A_UNDERLINE:
+            mc_tty_color_pair_init_special (mc_color_pair,
+                                            COLOR_WHITE, COLOR_BLACK,
+                                            COLOR_WHITE, COLOR_BLACK, A_UNDERLINE);
+            break;
+        default:
+            break;
+        }
+    }
+    else
+    {
+        int ifg, ibg, attr;
+
+        ifg = mc_color_pair->ifg;
+        ibg = mc_color_pair->ibg;
+        attr = mc_color_pair->attr;
+
+        /* In legacy color mode, change bright colors into bold */
+        if (!tty_use_256colors (NULL) && !tty_use_truecolors (NULL))
+        {
+            if (ifg >= 8 && ifg < 16)
+            {
+                ifg &= 0x07;
+                attr |= A_BOLD;
+            }
+
+            if (ibg >= 8 && ibg < 16)
+            {
+                ibg &= 0x07;
+                /* attr | = A_BOLD | A_REVERSE ; */
+            }
+        }
+
+        init_pair (mc_color_pair->pair_index, ifg, ibg);
+        mc_tty_color_save_attr (mc_color_pair->pair_index, attr);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_setcolor (int color)
+{
+    attrset (COLOR_PAIR (color) | color_get_attr (color));
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_lowlevel_setcolor (int color)
+{
+    tty_setcolor (color);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_set_normal_attrs (void)
+{
+    standend ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+gboolean
+tty_use_256colors (GError ** error)
+{
+    (void) error;
+
+    return (COLORS == 256);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+gboolean
+tty_use_truecolors (GError ** error)
+{
+    /* Not yet supported in ncurses */
+    g_set_error (error, MC_ERROR, -1, _("True color not supported with ncurses."));
+    return FALSE;
+}
+
+/* --------------------------------------------------------------------------------------------- */
diff --git a/lib/tty/color-slang.c b/lib/tty/color-slang.c
new file mode 100644
index 0000000..412128c
--- /dev/null
+++ b/lib/tty/color-slang.c
@@ -0,0 +1,257 @@
+/*
+   Color setup for S_Lang screen library
+
+   Copyright (C) 1994-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Andrew Borodin <aborodin@vmail.ru>, 2009
+   Egmont Koblinger <egmont@gmail.com>, 2010
+
+   This file is part of the Midnight Commander.
+
+   The Midnight Commander is free software: you can redistribute it
+   and/or modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   The Midnight Commander 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file color-slang.c
+ *  \brief Source: S-Lang-specific color setup
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>          /* size_t */
+
+#include "lib/global.h"
+#include "lib/util.h"           /* whitespace() */
+
+#include "tty-slang.h"
+#include "color.h"              /* variables */
+#include "color-internal.h"
+
+/*** global variables ****************************************************************************/
+
+/*** file scope macro definitions ****************************************************************/
+
+/*** file scope type declarations ****************************************************************/
+
+/*** file scope variables ************************************************************************/
+
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+has_colors (gboolean disable, gboolean force)
+{
+    mc_tty_color_disable = disable;
+
+    if (force || (getenv ("COLORTERM") != NULL))
+        SLtt_Use_Ansi_Colors = 1;
+
+    if (!mc_tty_color_disable)
+    {
+        const char *terminal = getenv ("TERM");
+        const size_t len = strlen (terminal);
+        char *cts = mc_global.tty.color_terminal_string;
+
+        /* check mc_global.tty.color_terminal_string */
+        while (*cts != '\0')
+        {
+            char *s;
+            size_t i = 0;
+
+            while (whitespace (*cts))
+                cts++;
+            s = cts;
+
+            while (*cts != '\0' && *cts != ',')
+            {
+                cts++;
+                i++;
+            }
+
+            if ((i != 0) && (i == len) && (strncmp (s, terminal, i) == 0))
+                SLtt_Use_Ansi_Colors = 1;
+
+            if (*cts == ',')
+                cts++;
+        }
+    }
+    return SLtt_Use_Ansi_Colors;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+mc_tty_color_pair_init_special (tty_color_pair_t * mc_color_pair,
+                                const char *fg1, const char *bg1,
+                                const char *fg2, const char *bg2, SLtt_Char_Type mask)
+{
+    if (SLtt_Use_Ansi_Colors != 0)
+    {
+        if (!mc_tty_color_disable)
+        {
+            SLtt_set_color (mc_color_pair->pair_index, (char *) "", (char *) fg1, (char *) bg1);
+        }
+        else
+        {
+            SLtt_set_color (mc_color_pair->pair_index, (char *) "", (char *) fg2, (char *) bg2);
+        }
+    }
+    else
+    {
+        SLtt_set_mono (mc_color_pair->pair_index, NULL, mask);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_color_init_lib (gboolean disable, gboolean force)
+{
+    /* FIXME: if S-Lang is used, has_colors() must be called regardless
+       of whether we are interested in its result */
+    if (has_colors (disable, force) && !disable)
+    {
+        use_colors = TRUE;
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_color_deinit_lib (void)
+{
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_color_try_alloc_pair_lib (tty_color_pair_t * mc_color_pair)
+{
+    if (mc_color_pair->ifg <= (int) SPEC_A_REVERSE)
+    {
+        switch (mc_color_pair->ifg)
+        {
+        case SPEC_A_REVERSE:
+            mc_tty_color_pair_init_special (mc_color_pair,
+                                            "black", "white", "black", "lightgray", SLTT_REV_MASK);
+            break;
+        case SPEC_A_BOLD:
+            mc_tty_color_pair_init_special (mc_color_pair,
+                                            "white", "black", "white", "black", SLTT_BOLD_MASK);
+            break;
+        case SPEC_A_BOLD_REVERSE:
+            mc_tty_color_pair_init_special (mc_color_pair,
+                                            "white", "white",
+                                            "white", "white", SLTT_BOLD_MASK | SLTT_REV_MASK);
+            break;
+        case SPEC_A_UNDERLINE:
+            mc_tty_color_pair_init_special (mc_color_pair,
+                                            "white", "black", "white", "black", SLTT_ULINE_MASK);
+            break;
+        default:
+            break;
+        }
+    }
+    else
+    {
+        const char *fg, *bg;
+
+        fg = tty_color_get_name_by_index (mc_color_pair->ifg);
+        bg = tty_color_get_name_by_index (mc_color_pair->ibg);
+        SLtt_set_color (mc_color_pair->pair_index, (char *) "", (char *) fg, (char *) bg);
+        SLtt_add_color_attribute (mc_color_pair->pair_index, mc_color_pair->attr);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_setcolor (int color)
+{
+    SLsmg_set_color (color);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/**
+ * Set colorpair by index, don't interpret S-Lang "emulated attributes"
+ */
+
+void
+tty_lowlevel_setcolor (int color)
+{
+    SLsmg_set_color (color & 0x7F);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_set_normal_attrs (void)
+{
+    SLsmg_normal_video ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+gboolean
+tty_use_256colors (GError ** error)
+{
+    gboolean ret;
+
+    ret = (SLtt_Use_Ansi_Colors && SLtt_tgetnum ((char *) "Co") == 256);
+
+    if (!ret)
+        g_set_error (error, MC_ERROR, -1,
+                     _("Your terminal doesn't even seem to support 256 colors."));
+
+    return ret;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+gboolean
+tty_use_truecolors (GError ** error)
+{
+    char *colorterm;
+
+    /* True color is supported since slang-2.3.1 on 64-bit machines,
+       and expected to be supported from slang-3 on 32-bit machines:
+       http://lists.jedsoft.org/lists/slang-users/2016/0000014.html.
+       Check for sizeof (long) being 8, exactly as slang does. */
+    if (SLang_Version < 20301 || (sizeof (long) != 8 && SLang_Version < 30000))
+    {
+        g_set_error (error, MC_ERROR, -1, _("True color not supported in this slang version."));
+        return FALSE;
+    }
+
+    /* Duplicate slang's check so that we can pop up an error message
+       rather than silently use wrong colors. */
+    colorterm = getenv ("COLORTERM");
+    if (colorterm == NULL
+        || (strcmp (colorterm, "truecolor") != 0 && strcmp (colorterm, "24bit") != 0))
+    {
+        g_set_error (error, MC_ERROR, -1,
+                     _("Set COLORTERM=truecolor if your terminal really supports true colors."));
+        return FALSE;
+    }
+
+    return TRUE;
+}
+
+/* --------------------------------------------------------------------------------------------- */
diff --git a/lib/tty/color-slang.h b/lib/tty/color-slang.h
new file mode 100644
index 0000000..a1a8d55
--- /dev/null
+++ b/lib/tty/color-slang.h
@@ -0,0 +1,56 @@
+
+/** \file color-slang.h
+ *  \brief Header: S-Lang-specific color setup
+ */
+
+#ifndef MC__COLOR_SLANG_H
+#define MC__COLOR_SLANG_H
+
+#include "tty-slang.h"          /* S-Lang headers */
+
+/*** typedefs(not structures) and defined constants **********************************************/
+
+/* When using Slang with color, we have all the indexes free but
+ * those defined here (A_BOLD, A_ITALIC, A_UNDERLINE, A_REVERSE, A_BLINK)
+ */
+
+#ifndef A_BOLD
+#define A_BOLD SLTT_BOLD_MASK
+#endif /* A_BOLD */
+#ifdef SLTT_ITALIC_MASK         /* available since slang-pre2.3.0-107 */
+#ifndef A_ITALIC
+#define A_ITALIC SLTT_ITALIC_MASK
+#endif /* A_ITALIC */
+#endif /* SLTT_ITALIC_MASK */
+#ifndef A_UNDERLINE
+#define A_UNDERLINE SLTT_ULINE_MASK
+#endif /* A_UNDERLINE */
+#ifndef A_REVERSE
+#define A_REVERSE SLTT_REV_MASK
+#endif /* A_REVERSE */
+#ifndef A_BLINK
+#define A_BLINK SLTT_BLINK_MASK
+#endif /* A_BLINK */
+
+/*** enums ***************************************************************************************/
+
+enum
+{
+    COLOR_BLACK = 0,
+    COLOR_RED,
+    COLOR_GREEN,
+    COLOR_YELLOW,
+    COLOR_BLUE,
+    COLOR_MAGENTA,
+    COLOR_CYAN,
+    COLOR_WHITE
+};
+
+/*** structures declarations (and typedefs of structures)*****************************************/
+
+/*** global variables defined in .c file *********************************************************/
+
+/*** declarations of public functions ************************************************************/
+
+/*** inline functions ****************************************************************************/
+#endif /* MC_COLOR_SLANG_H */
diff --git a/lib/tty/color.c b/lib/tty/color.c
new file mode 100644
index 0000000..b33e68e
--- /dev/null
+++ b/lib/tty/color.c
@@ -0,0 +1,243 @@
+/*
+   Color setup.
+   Interface functions.
+
+   Copyright (C) 1994-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Andrew Borodin <aborodin@vmail.ru>, 2009
+   Slava Zanko <slavazanko@gmail.com>, 2009
+   Egmont Koblinger <egmont@gmail.com>, 2010
+
+   This file is part of the Midnight Commander.
+
+   The Midnight Commander is free software: you can redistribute it
+   and/or modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   The Midnight Commander 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file color.c
+ *  \brief Source: color setup
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>          /* size_t */
+
+#include "lib/global.h"
+
+#include "tty.h"
+#include "color.h"
+
+#include "color-internal.h"
+
+/*** global variables ****************************************************************************/
+
+static char *tty_color_defaults__fg = NULL;
+static char *tty_color_defaults__bg = NULL;
+static char *tty_color_defaults__attrs = NULL;
+
+/* Set if we are actually using colors */
+gboolean use_colors = FALSE;
+
+/*** file scope macro definitions ****************************************************************/
+
+/*** file scope type declarations ****************************************************************/
+
+/*** file scope variables ************************************************************************/
+
+static GHashTable *mc_tty_color__hashtable = NULL;
+
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+static gboolean
+tty_color_free_condition_cb (gpointer key, gpointer value, gpointer user_data)
+{
+    gboolean is_temp_color;
+    tty_color_pair_t *mc_color_pair;
+    (void) key;
+
+    is_temp_color = user_data != NULL;
+    mc_color_pair = (tty_color_pair_t *) value;
+    return (mc_color_pair->is_temp == is_temp_color);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+tty_color_free_all (gboolean is_temp_color)
+{
+    g_hash_table_foreach_remove (mc_tty_color__hashtable, tty_color_free_condition_cb,
+                                 is_temp_color ? GSIZE_TO_POINTER (1) : NULL);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static gboolean
+tty_color_get_next_cpn_cb (gpointer key, gpointer value, gpointer user_data)
+{
+    size_t cp;
+    tty_color_pair_t *mc_color_pair;
+    (void) key;
+
+    cp = GPOINTER_TO_SIZE (user_data);
+    mc_color_pair = (tty_color_pair_t *) value;
+
+    return (cp == mc_color_pair->pair_index);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static size_t
+tty_color_get_next__color_pair_number (void)
+{
+    size_t cp_count, cp;
+
+    cp_count = g_hash_table_size (mc_tty_color__hashtable);
+    for (cp = 0; cp < cp_count; cp++)
+        if (g_hash_table_find (mc_tty_color__hashtable, tty_color_get_next_cpn_cb,
+                               GSIZE_TO_POINTER (cp)) == NULL)
+            break;
+
+    return cp;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_init_colors (gboolean disable, gboolean force)
+{
+    tty_color_init_lib (disable, force);
+    mc_tty_color__hashtable = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_colors_done (void)
+{
+    tty_color_deinit_lib ();
+    g_free (tty_color_defaults__fg);
+    g_free (tty_color_defaults__bg);
+    g_free (tty_color_defaults__attrs);
+
+    g_hash_table_destroy (mc_tty_color__hashtable);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+gboolean
+tty_use_colors (void)
+{
+    return use_colors;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+int
+tty_try_alloc_color_pair2 (const char *fg, const char *bg, const char *attrs,
+                           gboolean is_temp_color)
+{
+    gchar *color_pair;
+    tty_color_pair_t *mc_color_pair;
+    int ifg, ibg, attr;
+
+    if (fg == NULL || !strcmp (fg, "base"))
+        fg = tty_color_defaults__fg;
+    if (bg == NULL || !strcmp (bg, "base"))
+        bg = tty_color_defaults__bg;
+    if (attrs == NULL || !strcmp (attrs, "base"))
+        attrs = tty_color_defaults__attrs;
+
+    ifg = tty_color_get_index_by_name (fg);
+    ibg = tty_color_get_index_by_name (bg);
+    attr = tty_attr_get_bits (attrs);
+
+    color_pair = g_strdup_printf ("%d.%d.%d", ifg, ibg, attr);
+    if (color_pair == NULL)
+        return 0;
+
+    mc_color_pair =
+        (tty_color_pair_t *) g_hash_table_lookup (mc_tty_color__hashtable, (gpointer) color_pair);
+
+    if (mc_color_pair != NULL)
+    {
+        g_free (color_pair);
+        return mc_color_pair->pair_index;
+    }
+
+    mc_color_pair = g_try_new0 (tty_color_pair_t, 1);
+    if (mc_color_pair == NULL)
+    {
+        g_free (color_pair);
+        return 0;
+    }
+
+    mc_color_pair->is_temp = is_temp_color;
+    mc_color_pair->ifg = ifg;
+    mc_color_pair->ibg = ibg;
+    mc_color_pair->attr = attr;
+    mc_color_pair->pair_index = tty_color_get_next__color_pair_number ();
+
+    tty_color_try_alloc_pair_lib (mc_color_pair);
+
+    g_hash_table_insert (mc_tty_color__hashtable, (gpointer) color_pair, (gpointer) mc_color_pair);
+
+    return mc_color_pair->pair_index;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+int
+tty_try_alloc_color_pair (const char *fg, const char *bg, const char *attrs)
+{
+    return tty_try_alloc_color_pair2 (fg, bg, attrs, TRUE);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_color_free_all_tmp (void)
+{
+    tty_color_free_all (TRUE);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_color_free_all_non_tmp (void)
+{
+    tty_color_free_all (FALSE);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_color_set_defaults (const char *fgcolor, const char *bgcolor, const char *attrs)
+{
+    g_free (tty_color_defaults__fg);
+    g_free (tty_color_defaults__bg);
+    g_free (tty_color_defaults__attrs);
+
+    tty_color_defaults__fg = g_strdup (fgcolor);
+    tty_color_defaults__bg = g_strdup (bgcolor);
+    tty_color_defaults__attrs = g_strdup (attrs);
+}
+
+/* --------------------------------------------------------------------------------------------- */
diff --git a/lib/tty/color.h b/lib/tty/color.h
new file mode 100644
index 0000000..138781f
--- /dev/null
+++ b/lib/tty/color.h
@@ -0,0 +1,56 @@
+/** \file color.h
+ *  \brief Header: color setup
+ *
+ * PLEASE FORGOT ABOUT tty/color.h!
+ * Use skin engine for getting needed color pairs.
+ *
+ * edit/syntax.c may use this file directly, I'm agree. :)
+ *
+ */
+
+#ifndef MC__COLOR_H
+#define MC__COLOR_H
+
+#include "lib/global.h"         /* glib.h */
+
+#ifdef HAVE_SLANG
+#include "color-slang.h"
+#else
+#include "tty-ncurses.h"
+#endif
+
+/*** typedefs(not structures) and defined constants **********************************************/
+
+#define ALLOC_COLOR_PAIR_INDEX 1
+
+/*** enums ***************************************************************************************/
+
+/*** structures declarations (and typedefs of structures)*****************************************/
+
+/*** global variables defined in .c file *********************************************************/
+
+/*** declarations of public functions ************************************************************/
+
+void tty_init_colors (gboolean disable, gboolean force);
+void tty_colors_done (void);
+
+gboolean tty_use_colors (void);
+int tty_try_alloc_color_pair (const char *fg, const char *bg, const char *attrs);
+int tty_try_alloc_color_pair2 (const char *fg, const char *bg, const char *attrs,
+                               gboolean is_temp_color);
+
+void tty_color_free_all_tmp (void);
+void tty_color_free_all_non_tmp (void);
+
+void tty_setcolor (int color);
+void tty_lowlevel_setcolor (int color);
+void tty_set_normal_attrs (void);
+
+void tty_color_set_defaults (const char *fgcolor, const char *bgcolor, const char *attrs);
+
+extern gboolean tty_use_256colors (GError ** error);
+extern gboolean tty_use_truecolors (GError ** error);
+
+/*** inline functions ****************************************************************************/
+
+#endif /* MC__COLOR_H */
diff --git a/lib/tty/key.c b/lib/tty/key.c
new file mode 100644
index 0000000..dd893e9
--- /dev/null
+++ b/lib/tty/key.c
@@ -0,0 +1,2250 @@
+/*
+   Keyboard support routines.
+
+   Copyright (C) 1994-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Miguel de Icaza, 1994, 1995
+   Janne Kukonlehto, 1994, 1995
+   Jakub Jelinek, 1995
+   Norbert Warmuth, 1997
+   Denys Vlasenko <vda.linux@googlemail.com>, 2013
+   Slava Zanko <slavazanko@gmail.com>, 2013
+   Egmont Koblinger <egmont@gmail.com>, 2013
+
+   This file is part of the Midnight Commander.
+
+   The Midnight Commander is free software: you can redistribute it
+   and/or modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   The Midnight Commander 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file key.c
+ *  \brief Source: keyboard support routines
+ */
+
+#include <config.h>
+
+#include <ctype.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#else
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+#endif
+
+#include "lib/global.h"
+
+#include "lib/vfs/vfs.h"
+
+#include "tty.h"
+#include "tty-internal.h"       /* mouse_enabled */
+#include "mouse.h"
+#include "key.h"
+
+#include "lib/widget.h"         /* mc_refresh() */
+
+#ifdef HAVE_TEXTMODE_X11_SUPPORT
+#include "x11conn.h"
+#endif
+
+#ifdef __linux__
+#if defined(__GLIBC__) && (__GLIBC__ < 2)
+#include <linux/termios.h>      /* TIOCLINUX */
+#else
+#include <termios.h>
+#endif
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+#endif /* __linux__ */
+
+#ifdef __CYGWIN__
+#include <termios.h>
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+#endif /* __CYGWIN__ */
+
+#ifdef __QNXNTO__
+#include <dlfcn.h>
+#include <Ph.h>
+#include <sys/dcmd_chr.h>
+#endif /* __QNXNTO__ */
+
+/*** global variables ****************************************************************************/
+
+int mou_auto_repeat = 100;      /* ms */
+int double_click_speed = 250;   /* ms */
+gboolean old_esc_mode = TRUE;
+/* timeout for old_esc_mode in usec */
+int old_esc_mode_timeout = G_USEC_PER_SEC;      /* us, settable via env */
+gboolean use_8th_bit_as_meta = FALSE;
+
+gboolean bracketed_pasting_in_progress = FALSE;
+
+/* This table is a mapping between names and the constants we use
+ * We use this to allow users to define alternate definitions for
+ * certain keys that may be missing from the terminal database
+ */
+const key_code_name_t key_name_conv_tab[] = {
+    {ESC_CHAR, "escape", N_("Escape"), "Esc"},
+    /* KEY_F(0) is not here, since we are mapping it to f10, so there is no reason
+       to define f0 as well. Also, it makes Learn keys a bunch of problems :( */
+    {KEY_F (1), "f1", N_("Function key 1"), "F1"},
+    {KEY_F (2), "f2", N_("Function key 2"), "F2"},
+    {KEY_F (3), "f3", N_("Function key 3"), "F3"},
+    {KEY_F (4), "f4", N_("Function key 4"), "F4"},
+    {KEY_F (5), "f5", N_("Function key 5"), "F5"},
+    {KEY_F (6), "f6", N_("Function key 6"), "F6"},
+    {KEY_F (7), "f7", N_("Function key 7"), "F7"},
+    {KEY_F (8), "f8", N_("Function key 8"), "F8"},
+    {KEY_F (9), "f9", N_("Function key 9"), "F9"},
+    {KEY_F (10), "f10", N_("Function key 10"), "F10"},
+    {KEY_F (11), "f11", N_("Function key 11"), "F11"},
+    {KEY_F (12), "f12", N_("Function key 12"), "F12"},
+    {KEY_F (13), "f13", N_("Function key 13"), "F13"},
+    {KEY_F (14), "f14", N_("Function key 14"), "F14"},
+    {KEY_F (15), "f15", N_("Function key 15"), "F15"},
+    {KEY_F (16), "f16", N_("Function key 16"), "F16"},
+    {KEY_F (17), "f17", N_("Function key 17"), "F17"},
+    {KEY_F (18), "f18", N_("Function key 18"), "F18"},
+    {KEY_F (19), "f19", N_("Function key 19"), "F19"},
+    {KEY_F (20), "f20", N_("Function key 20"), "F20"},
+    {ALT ('\t'), "complete", N_("Completion/M-tab"), "Meta-Tab"},
+    {KEY_BTAB, "backtab", N_("BackTab/S-tab"), "Shift-Tab"},
+    {KEY_BACKSPACE, "backspace", N_("Backspace"), "Backspace"},
+    {KEY_UP, "up", N_("Up arrow"), "Up"},
+    {KEY_DOWN, "down", N_("Down arrow"), "Down"},
+    {KEY_LEFT, "left", N_("Left arrow"), "Left"},
+    {KEY_RIGHT, "right", N_("Right arrow"), "Right"},
+    {KEY_IC, "insert", N_("Insert"), "Ins"},
+    {KEY_DC, "delete", N_("Delete"), "Del"},
+    {KEY_HOME, "home", N_("Home"), "Home"},
+    {KEY_END, "end", N_("End key"), "End"},
+    {KEY_PPAGE, "pgup", N_("Page Up"), "PgUp"},
+    {KEY_NPAGE, "pgdn", N_("Page Down"), "PgDn"},
+    {(int) '/', "kpslash", N_("/ on keypad"), "/"},
+    {KEY_KP_MULTIPLY, "kpasterisk", N_("* on keypad"), "*"},
+    {KEY_KP_SUBTRACT, "kpminus", N_("- on keypad"), "-"},
+    {KEY_KP_ADD, "kpplus", N_("+ on keypad"), "+"},
+
+    /* From here on, these won't be shown in Learn keys (no space) */
+    {KEY_LEFT, "kpleft", N_("Left arrow keypad"), "Left"},
+    {KEY_RIGHT, "kpright", N_("Right arrow keypad"), "Right"},
+    {KEY_UP, "kpup", N_("Up arrow keypad"), "Up"},
+    {KEY_DOWN, "kpdown", N_("Down arrow keypad"), "Down"},
+    {KEY_HOME, "kphome", N_("Home on keypad"), "Home"},
+    {KEY_END, "kpend", N_("End on keypad"), "End"},
+    {KEY_NPAGE, "kpnpage", N_("Page Down keypad"), "PgDn"},
+    {KEY_PPAGE, "kpppage", N_("Page Up keypad"), "PgUp"},
+    {KEY_IC, "kpinsert", N_("Insert on keypad"), "Ins"},
+    {KEY_DC, "kpdelete", N_("Delete on keypad"), "Del"},
+    {(int) '\n', "kpenter", N_("Enter on keypad"), "Enter"},
+    {KEY_F (21), "f21", N_("Function key 21"), "F21"},
+    {KEY_F (22), "f22", N_("Function key 22"), "F22"},
+    {KEY_F (23), "f23", N_("Function key 23"), "F23"},
+    {KEY_F (24), "f24", N_("Function key 24"), "F24"},
+    {KEY_A1, "a1", N_("A1 key"), "A1"},
+    {KEY_C1, "c1", N_("C1 key"), "C1"},
+
+    /* Alternative label */
+    {ESC_CHAR, "esc", N_("Escape"), "Esc"},
+    {KEY_BACKSPACE, "bs", N_("Backspace"), "Bakspace"},
+    {KEY_IC, "ins", N_("Insert"), "Ins"},
+    {KEY_DC, "del", N_("Delete"), "Del"},
+    {(int) '*', "asterisk", N_("Asterisk"), "*"},
+    {(int) '-', "minus", N_("Minus"), "-"},
+    {(int) '+', "plus", N_("Plus"), "+"},
+    {(int) '.', "dot", N_("Dot"), "."},
+    {(int) '<', "lt", N_("Less than"), "<"},
+    {(int) '>', "gt", N_("Great than"), ">"},
+    {(int) '=', "equal", N_("Equal"), "="},
+    {(int) ',', "comma", N_("Comma"), ","},
+    {(int) '\'', "apostrophe", N_("Apostrophe"), "\'"},
+    {(int) ':', "colon", N_("Colon"), ":"},
+    {(int) ';', "semicolon", N_("Semicolon"), ";"},
+    {(int) '!', "exclamation", N_("Exclamation mark"), "!"},
+    {(int) '?', "question", N_("Question mark"), "?"},
+    {(int) '&', "ampersand", N_("Ampersand"), "&"},
+    {(int) '$', "dollar", N_("Dollar sign"), "$"},
+    {(int) '"', "quota", N_("Quotation mark"), "\""},
+    {(int) '%', "percent", N_("Percent sign"), "%"},
+    {(int) '^', "caret", N_("Caret"), "^"},
+    {(int) '~', "tilda", N_("Tilda"), "~"},
+    {(int) '`', "prime", N_("Prime"), "`"},
+    {(int) '_', "underline", N_("Underline"), "_"},
+    {(int) '_', "understrike", N_("Understrike"), "_"},
+    {(int) '|', "pipe", N_("Pipe"), "|"},
+    {(int) '(', "lparenthesis", N_("Left parenthesis"), "("},
+    {(int) ')', "rparenthesis", N_("Right parenthesis"), ")"},
+    {(int) '[', "lbracket", N_("Left bracket"), "["},
+    {(int) ']', "rbracket", N_("Right bracket"), "]"},
+    {(int) '{', "lbrace", N_("Left brace"), "{"},
+    {(int) '}', "rbrace", N_("Right brace"), "}"},
+    {(int) '\n', "enter", N_("Enter"), "Enter"},
+    {(int) '\t', "tab", N_("Tab key"), "Tab"},
+    {(int) ' ', "space", N_("Space key"), "Space"},
+    {(int) '/', "slash", N_("Slash key"), "/"},
+    {(int) '\\', "backslash", N_("Backslash key"), "\\"},
+    {(int) '#', "number", N_("Number sign #"), "#"},
+    {(int) '#', "hash", N_("Number sign #"), "#"},
+    /* TRANSLATORS: Please translate as in "at sign" (@). */
+    {(int) '@', "at", N_("At sign"), "@"},
+
+    /* meta keys */
+    {KEY_M_CTRL, "control", N_("Ctrl"), "C"},
+    {KEY_M_CTRL, "ctrl", N_("Ctrl"), "C"},
+    {KEY_M_ALT, "meta", N_("Alt"), "M"},
+    {KEY_M_ALT, "alt", N_("Alt"), "M"},
+    {KEY_M_ALT, "ralt", N_("Alt"), "M"},
+    {KEY_M_SHIFT, "shift", N_("Shift"), "S"},
+
+    {0, NULL, NULL, NULL}
+};
+
+/*** file scope macro definitions ****************************************************************/
+
+#define MC_USEC_PER_MSEC 1000
+
+/* The maximum sequence length (32 + null terminator) */
+#define SEQ_BUFFER_LEN 33
+
+/*** file scope type declarations ****************************************************************/
+
+/* Linux console keyboard modifiers */
+typedef enum
+{
+    SHIFT_PRESSED = (1 << 0),
+    ALTR_PRESSED = (1 << 1),
+    CONTROL_PRESSED = (1 << 2),
+    ALTL_PRESSED = (1 << 3)
+} mod_pressed_t;
+
+typedef struct key_def
+{
+    char ch;                    /* Holds the matching char code */
+    int code;                   /* The code returned, valid if child == NULL */
+    struct key_def *next;
+    struct key_def *child;      /* sequence continuation */
+    int action;                 /* optional action to be done. Now used only
+                                   to mark that we are just after the first
+                                   Escape */
+} key_def;
+
+typedef struct
+{
+    int code;
+    const char *seq;
+    int action;
+} key_define_t;
+
+/* File descriptor monitoring add/remove routines */
+typedef struct
+{
+    int fd;
+    select_fn callback;
+    void *info;
+} select_t;
+
+typedef enum KeySortType
+{
+    KEY_NOSORT = 0,
+    KEY_SORTBYNAME,
+    KEY_SORTBYCODE
+} KeySortType;
+
+#ifdef __QNXNTO__
+typedef int (*ph_dv_f) (void *, void *);
+typedef int (*ph_ov_f) (void *);
+typedef int (*ph_pqc_f) (unsigned short, PhCursorInfo_t *);
+#endif
+
+/*** file scope variables ************************************************************************/
+
+static key_define_t mc_default_keys[] = {
+    {ESC_CHAR, ESC_STR, MCKEY_ESCAPE},
+    {ESC_CHAR, ESC_STR ESC_STR, MCKEY_NOACTION},
+    {MCKEY_BRACKETED_PASTING_START, ESC_STR "[200~", MCKEY_NOACTION},
+    {MCKEY_BRACKETED_PASTING_END, ESC_STR "[201~", MCKEY_NOACTION},
+    {0, NULL, MCKEY_NOACTION},
+};
+
+/* Broken terminfo and termcap databases on xterminals */
+static key_define_t xterm_key_defines[] = {
+    {KEY_F (1), ESC_STR "OP", MCKEY_NOACTION},
+    {KEY_F (2), ESC_STR "OQ", MCKEY_NOACTION},
+    {KEY_F (3), ESC_STR "OR", MCKEY_NOACTION},
+    {KEY_F (4), ESC_STR "OS", MCKEY_NOACTION},
+    {KEY_F (1), ESC_STR "[11~", MCKEY_NOACTION},
+    {KEY_F (2), ESC_STR "[12~", MCKEY_NOACTION},
+    {KEY_F (3), ESC_STR "[13~", MCKEY_NOACTION},
+    {KEY_F (4), ESC_STR "[14~", MCKEY_NOACTION},
+    {KEY_F (5), ESC_STR "[15~", MCKEY_NOACTION},
+    {KEY_F (6), ESC_STR "[17~", MCKEY_NOACTION},
+    {KEY_F (7), ESC_STR "[18~", MCKEY_NOACTION},
+    {KEY_F (8), ESC_STR "[19~", MCKEY_NOACTION},
+    {KEY_F (9), ESC_STR "[20~", MCKEY_NOACTION},
+    {KEY_F (10), ESC_STR "[21~", MCKEY_NOACTION},
+
+    /* old xterm Shift-arrows */
+    {KEY_M_SHIFT | KEY_UP, ESC_STR "O2A", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_DOWN, ESC_STR "O2B", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_RIGHT, ESC_STR "O2C", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_LEFT, ESC_STR "O2D", MCKEY_NOACTION},
+
+    /* new xterm Shift-arrows */
+    {KEY_M_SHIFT | KEY_UP, ESC_STR "[1;2A", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_DOWN, ESC_STR "[1;2B", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_RIGHT, ESC_STR "[1;2C", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_LEFT, ESC_STR "[1;2D", MCKEY_NOACTION},
+
+    /* more xterm keys with modifiers */
+    {KEY_M_CTRL | KEY_PPAGE, ESC_STR "[5;5~", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_NPAGE, ESC_STR "[6;5~", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_IC, ESC_STR "[2;5~", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_DC, ESC_STR "[3;5~", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_HOME, ESC_STR "[1;5H", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_END, ESC_STR "[1;5F", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_HOME, ESC_STR "[1;2H", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_END, ESC_STR "[1;2F", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_UP, ESC_STR "[1;5A", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_DOWN, ESC_STR "[1;5B", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_RIGHT, ESC_STR "[1;5C", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_LEFT, ESC_STR "[1;5D", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_IC, ESC_STR "[2;2~", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_DC, ESC_STR "[3;2~", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_M_CTRL | KEY_UP, ESC_STR "[1;6A", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_M_CTRL | KEY_DOWN, ESC_STR "[1;6B", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_M_CTRL | KEY_RIGHT, ESC_STR "[1;6C", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_M_CTRL | KEY_LEFT, ESC_STR "[1;6D", MCKEY_NOACTION},
+    {KEY_M_SHIFT | '\t', ESC_STR "[Z", MCKEY_NOACTION},
+
+    /* putty */
+    {KEY_M_SHIFT | KEY_M_CTRL | KEY_UP, ESC_STR "[[1;6A", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_M_CTRL | KEY_DOWN, ESC_STR "[[1;6B", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_M_CTRL | KEY_RIGHT, ESC_STR "[[1;6C", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_M_CTRL | KEY_LEFT, ESC_STR "[[1;6D", MCKEY_NOACTION},
+
+    /* putty alt-arrow keys */
+    /* removed as source esc esc esc trouble */
+    /*
+       { KEY_M_ALT | KEY_UP,    ESC_STR ESC_STR "OA", MCKEY_NOACTION },
+       { KEY_M_ALT | KEY_DOWN,  ESC_STR ESC_STR "OB", MCKEY_NOACTION },
+       { KEY_M_ALT | KEY_RIGHT, ESC_STR ESC_STR "OC", MCKEY_NOACTION },
+       { KEY_M_ALT | KEY_LEFT,  ESC_STR ESC_STR "OD", MCKEY_NOACTION },
+       { KEY_M_ALT | KEY_PPAGE, ESC_STR ESC_STR "[5~", MCKEY_NOACTION },
+       { KEY_M_ALT | KEY_NPAGE, ESC_STR ESC_STR "[6~", MCKEY_NOACTION },
+       { KEY_M_ALT | KEY_HOME,  ESC_STR ESC_STR "[1~", MCKEY_NOACTION },
+       { KEY_M_ALT | KEY_END,   ESC_STR ESC_STR "[4~", MCKEY_NOACTION },
+
+       { KEY_M_CTRL | KEY_M_ALT | KEY_UP,    ESC_STR ESC_STR "[1;2A", MCKEY_NOACTION },
+       { KEY_M_CTRL | KEY_M_ALT | KEY_DOWN,  ESC_STR ESC_STR "[1;2B", MCKEY_NOACTION },
+       { KEY_M_CTRL | KEY_M_ALT | KEY_RIGHT, ESC_STR ESC_STR "[1;2C", MCKEY_NOACTION },
+       { KEY_M_CTRL | KEY_M_ALT | KEY_LEFT,  ESC_STR ESC_STR "[1;2D", MCKEY_NOACTION },
+
+       { KEY_M_CTRL | KEY_M_ALT | KEY_PPAGE, ESC_STR ESC_STR "[[5;5~", MCKEY_NOACTION },
+       { KEY_M_CTRL | KEY_M_ALT | KEY_NPAGE, ESC_STR ESC_STR "[[6;5~", MCKEY_NOACTION },
+       { KEY_M_CTRL | KEY_M_ALT | KEY_HOME,  ESC_STR ESC_STR "[1;5H", MCKEY_NOACTION },
+       { KEY_M_CTRL | KEY_M_ALT | KEY_END,   ESC_STR ESC_STR "[1;5F", MCKEY_NOACTION },
+     */
+    /* xterm alt-arrow keys */
+    {KEY_M_ALT | KEY_UP, ESC_STR "[1;3A", MCKEY_NOACTION},
+    {KEY_M_ALT | KEY_DOWN, ESC_STR "[1;3B", MCKEY_NOACTION},
+    {KEY_M_ALT | KEY_RIGHT, ESC_STR "[1;3C", MCKEY_NOACTION},
+    {KEY_M_ALT | KEY_LEFT, ESC_STR "[1;3D", MCKEY_NOACTION},
+    {KEY_M_ALT | KEY_PPAGE, ESC_STR "[5;3~", MCKEY_NOACTION},
+    {KEY_M_ALT | KEY_NPAGE, ESC_STR "[6;3~", MCKEY_NOACTION},
+    {KEY_M_ALT | KEY_HOME, ESC_STR "[1~", MCKEY_NOACTION},
+    {KEY_M_ALT | KEY_END, ESC_STR "[4~", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_M_ALT | KEY_UP, ESC_STR "[1;7A", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_M_ALT | KEY_DOWN, ESC_STR "[1;7B", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_M_ALT | KEY_RIGHT, ESC_STR "[1;7C", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_M_ALT | KEY_LEFT, ESC_STR "[1;7D", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_M_ALT | KEY_PPAGE, ESC_STR "[5;7~", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_M_ALT | KEY_NPAGE, ESC_STR "[6;7~", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_M_ALT | KEY_HOME, ESC_STR "OH", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_M_ALT | KEY_END, ESC_STR "OF", MCKEY_NOACTION},
+
+    {KEY_M_SHIFT | KEY_M_ALT | KEY_UP, ESC_STR "[1;4A", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_M_ALT | KEY_DOWN, ESC_STR "[1;4B", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_M_ALT | KEY_RIGHT, ESC_STR "[1;4C", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_M_ALT | KEY_LEFT, ESC_STR "[1;4D", MCKEY_NOACTION},
+
+    /* rxvt keys with modifiers */
+    {KEY_M_SHIFT | KEY_UP, ESC_STR "[a", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_DOWN, ESC_STR "[b", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_RIGHT, ESC_STR "[c", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_LEFT, ESC_STR "[d", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_UP, ESC_STR "Oa", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_DOWN, ESC_STR "Ob", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_RIGHT, ESC_STR "Oc", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_LEFT, ESC_STR "Od", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_PPAGE, ESC_STR "[5^", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_NPAGE, ESC_STR "[6^", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_HOME, ESC_STR "[7^", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_END, ESC_STR "[8^", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_HOME, ESC_STR "[7$", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_END, ESC_STR "[8$", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_IC, ESC_STR "[2^", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_DC, ESC_STR "[3^", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_DC, ESC_STR "[3$", MCKEY_NOACTION},
+
+    /* konsole keys with modifiers */
+    {KEY_M_SHIFT | KEY_HOME, ESC_STR "O2H", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_END, ESC_STR "O2F", MCKEY_NOACTION},
+
+    /* gnome-terminal */
+    {KEY_M_SHIFT | KEY_UP, ESC_STR "[2A", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_DOWN, ESC_STR "[2B", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_RIGHT, ESC_STR "[2C", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_LEFT, ESC_STR "[2D", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_UP, ESC_STR "[5A", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_DOWN, ESC_STR "[5B", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_RIGHT, ESC_STR "[5C", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_LEFT, ESC_STR "[5D", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_M_CTRL | KEY_UP, ESC_STR "[6A", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_M_CTRL | KEY_DOWN, ESC_STR "[6B", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_M_CTRL | KEY_RIGHT, ESC_STR "[6C", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_M_CTRL | KEY_LEFT, ESC_STR "[6D", MCKEY_NOACTION},
+
+    /* gnome-terminal - application mode */
+    {KEY_M_CTRL | KEY_UP, ESC_STR "O5A", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_DOWN, ESC_STR "O5B", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_RIGHT, ESC_STR "O5C", MCKEY_NOACTION},
+    {KEY_M_CTRL | KEY_LEFT, ESC_STR "O5D", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_M_CTRL | KEY_UP, ESC_STR "O6A", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_M_CTRL | KEY_DOWN, ESC_STR "O6B", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_M_CTRL | KEY_RIGHT, ESC_STR "O6C", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_M_CTRL | KEY_LEFT, ESC_STR "O6D", MCKEY_NOACTION},
+
+    /* iTerm */
+    {KEY_M_SHIFT | KEY_PPAGE, ESC_STR "[5;2~", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_NPAGE, ESC_STR "[6;2~", MCKEY_NOACTION},
+
+    /* putty */
+    {KEY_M_SHIFT | KEY_PPAGE, ESC_STR "[[5;53~", MCKEY_NOACTION},
+    {KEY_M_SHIFT | KEY_NPAGE, ESC_STR "[[6;53~", MCKEY_NOACTION},
+
+    /* keypad keys */
+    {KEY_IC, ESC_STR "Op", MCKEY_NOACTION},
+    {KEY_DC, ESC_STR "On", MCKEY_NOACTION},
+    {'/', ESC_STR "Oo", MCKEY_NOACTION},
+    {'\n', ESC_STR "OM", MCKEY_NOACTION},
+
+    {0, NULL, MCKEY_NOACTION},
+};
+
+/* qansi-m terminals have a much more key combinatios,
+   which are undefined in termcap/terminfo */
+static key_define_t qansi_key_defines[] = {
+    /* qansi-m terminal */
+    {KEY_M_CTRL | KEY_NPAGE, ESC_STR "[u", MCKEY_NOACTION},     /* Ctrl-PgDown */
+    {KEY_M_CTRL | KEY_PPAGE, ESC_STR "[v", MCKEY_NOACTION},     /* Ctrl-PgUp   */
+    {KEY_M_CTRL | KEY_HOME, ESC_STR "[h", MCKEY_NOACTION},      /* Ctrl-Home   */
+    {KEY_M_CTRL | KEY_END, ESC_STR "[y", MCKEY_NOACTION},       /* Ctrl-End    */
+    {KEY_M_CTRL | KEY_IC, ESC_STR "[`", MCKEY_NOACTION},        /* Ctrl-Insert */
+    {KEY_M_CTRL | KEY_DC, ESC_STR "[p", MCKEY_NOACTION},        /* Ctrl-Delete */
+    {KEY_M_CTRL | KEY_LEFT, ESC_STR "[d", MCKEY_NOACTION},      /* Ctrl-Left   */
+    {KEY_M_CTRL | KEY_RIGHT, ESC_STR "[c", MCKEY_NOACTION},     /* Ctrl-Right  */
+    {KEY_M_CTRL | KEY_DOWN, ESC_STR "[b", MCKEY_NOACTION},      /* Ctrl-Down   */
+    {KEY_M_CTRL | KEY_UP, ESC_STR "[a", MCKEY_NOACTION},        /* Ctrl-Up     */
+    {KEY_M_CTRL | KEY_KP_ADD, ESC_STR "[s", MCKEY_NOACTION},    /* Ctrl-Gr-Plus */
+    {KEY_M_CTRL | KEY_KP_SUBTRACT, ESC_STR "[t", MCKEY_NOACTION},       /* Ctrl-Gr-Minus */
+    {KEY_M_CTRL | '\t', ESC_STR "[z", MCKEY_NOACTION},  /* Ctrl-Tab    */
+    {KEY_M_SHIFT | '\t', ESC_STR "[Z", MCKEY_NOACTION}, /* Shift-Tab   */
+    {KEY_M_CTRL | KEY_F (1), ESC_STR "[1~", MCKEY_NOACTION},    /* Ctrl-F1    */
+    {KEY_M_CTRL | KEY_F (2), ESC_STR "[2~", MCKEY_NOACTION},    /* Ctrl-F2    */
+    {KEY_M_CTRL | KEY_F (3), ESC_STR "[3~", MCKEY_NOACTION},    /* Ctrl-F3    */
+    {KEY_M_CTRL | KEY_F (4), ESC_STR "[4~", MCKEY_NOACTION},    /* Ctrl-F4    */
+    {KEY_M_CTRL | KEY_F (5), ESC_STR "[5~", MCKEY_NOACTION},    /* Ctrl-F5    */
+    {KEY_M_CTRL | KEY_F (6), ESC_STR "[6~", MCKEY_NOACTION},    /* Ctrl-F6    */
+    {KEY_M_CTRL | KEY_F (7), ESC_STR "[7~", MCKEY_NOACTION},    /* Ctrl-F7    */
+    {KEY_M_CTRL | KEY_F (8), ESC_STR "[8~", MCKEY_NOACTION},    /* Ctrl-F8    */
+    {KEY_M_CTRL | KEY_F (9), ESC_STR "[9~", MCKEY_NOACTION},    /* Ctrl-F9    */
+    {KEY_M_CTRL | KEY_F (10), ESC_STR "[10~", MCKEY_NOACTION},  /* Ctrl-F10  */
+    {KEY_M_CTRL | KEY_F (11), ESC_STR "[11~", MCKEY_NOACTION},  /* Ctrl-F11  */
+    {KEY_M_CTRL | KEY_F (12), ESC_STR "[12~", MCKEY_NOACTION},  /* Ctrl-F12  */
+    {KEY_M_ALT | KEY_F (1), ESC_STR "[17~", MCKEY_NOACTION},    /* Alt-F1    */
+    {KEY_M_ALT | KEY_F (2), ESC_STR "[18~", MCKEY_NOACTION},    /* Alt-F2    */
+    {KEY_M_ALT | KEY_F (3), ESC_STR "[19~", MCKEY_NOACTION},    /* Alt-F3    */
+    {KEY_M_ALT | KEY_F (4), ESC_STR "[20~", MCKEY_NOACTION},    /* Alt-F4    */
+    {KEY_M_ALT | KEY_F (5), ESC_STR "[21~", MCKEY_NOACTION},    /* Alt-F5    */
+    {KEY_M_ALT | KEY_F (6), ESC_STR "[22~", MCKEY_NOACTION},    /* Alt-F6    */
+    {KEY_M_ALT | KEY_F (7), ESC_STR "[23~", MCKEY_NOACTION},    /* Alt-F7    */
+    {KEY_M_ALT | KEY_F (8), ESC_STR "[24~", MCKEY_NOACTION},    /* Alt-F8    */
+    {KEY_M_ALT | KEY_F (9), ESC_STR "[25~", MCKEY_NOACTION},    /* Alt-F9    */
+    {KEY_M_ALT | KEY_F (10), ESC_STR "[26~", MCKEY_NOACTION},   /* Alt-F10   */
+    {KEY_M_ALT | KEY_F (11), ESC_STR "[27~", MCKEY_NOACTION},   /* Alt-F11   */
+    {KEY_M_ALT | KEY_F (12), ESC_STR "[28~", MCKEY_NOACTION},   /* Alt-F12   */
+    {KEY_M_ALT | 'a', ESC_STR "Na", MCKEY_NOACTION},    /* Alt-a     */
+    {KEY_M_ALT | 'b', ESC_STR "Nb", MCKEY_NOACTION},    /* Alt-b     */
+    {KEY_M_ALT | 'c', ESC_STR "Nc", MCKEY_NOACTION},    /* Alt-c     */
+    {KEY_M_ALT | 'd', ESC_STR "Nd", MCKEY_NOACTION},    /* Alt-d     */
+    {KEY_M_ALT | 'e', ESC_STR "Ne", MCKEY_NOACTION},    /* Alt-e     */
+    {KEY_M_ALT | 'f', ESC_STR "Nf", MCKEY_NOACTION},    /* Alt-f     */
+    {KEY_M_ALT | 'g', ESC_STR "Ng", MCKEY_NOACTION},    /* Alt-g     */
+    {KEY_M_ALT | 'h', ESC_STR "Nh", MCKEY_NOACTION},    /* Alt-h     */
+    {KEY_M_ALT | 'i', ESC_STR "Ni", MCKEY_NOACTION},    /* Alt-i     */
+    {KEY_M_ALT | 'j', ESC_STR "Nj", MCKEY_NOACTION},    /* Alt-j     */
+    {KEY_M_ALT | 'k', ESC_STR "Nk", MCKEY_NOACTION},    /* Alt-k     */
+    {KEY_M_ALT | 'l', ESC_STR "Nl", MCKEY_NOACTION},    /* Alt-l     */
+    {KEY_M_ALT | 'm', ESC_STR "Nm", MCKEY_NOACTION},    /* Alt-m     */
+    {KEY_M_ALT | 'n', ESC_STR "Nn", MCKEY_NOACTION},    /* Alt-n     */
+    {KEY_M_ALT | 'o', ESC_STR "No", MCKEY_NOACTION},    /* Alt-o     */
+    {KEY_M_ALT | 'p', ESC_STR "Np", MCKEY_NOACTION},    /* Alt-p     */
+    {KEY_M_ALT | 'q', ESC_STR "Nq", MCKEY_NOACTION},    /* Alt-q     */
+    {KEY_M_ALT | 'r', ESC_STR "Nr", MCKEY_NOACTION},    /* Alt-r     */
+    {KEY_M_ALT | 's', ESC_STR "Ns", MCKEY_NOACTION},    /* Alt-s     */
+    {KEY_M_ALT | 't', ESC_STR "Nt", MCKEY_NOACTION},    /* Alt-t     */
+    {KEY_M_ALT | 'u', ESC_STR "Nu", MCKEY_NOACTION},    /* Alt-u     */
+    {KEY_M_ALT | 'v', ESC_STR "Nv", MCKEY_NOACTION},    /* Alt-v     */
+    {KEY_M_ALT | 'w', ESC_STR "Nw", MCKEY_NOACTION},    /* Alt-w     */
+    {KEY_M_ALT | 'x', ESC_STR "Nx", MCKEY_NOACTION},    /* Alt-x     */
+    {KEY_M_ALT | 'y', ESC_STR "Ny", MCKEY_NOACTION},    /* Alt-y     */
+    {KEY_M_ALT | 'z', ESC_STR "Nz", MCKEY_NOACTION},    /* Alt-z     */
+    {KEY_KP_SUBTRACT, ESC_STR "[S", MCKEY_NOACTION},    /* Gr-Minus  */
+    {KEY_KP_ADD, ESC_STR "[T", MCKEY_NOACTION}, /* Gr-Plus   */
+    {0, NULL, MCKEY_NOACTION},
+};
+
+/* This holds all the key definitions */
+static key_def *keys = NULL;
+
+static int input_fd;
+static int disabled_channels = 0;       /* Disable channels checking */
+
+static GSList *select_list = NULL;
+
+static int seq_buffer[SEQ_BUFFER_LEN];
+static int *seq_append = NULL;
+
+static int *pending_keys = NULL;
+
+#ifdef __QNXNTO__
+ph_dv_f ph_attach;
+ph_ov_f ph_input_group;
+ph_pqc_f ph_query_cursor;
+#endif
+
+#ifdef HAVE_TEXTMODE_X11_SUPPORT
+static Display *x11_display;
+static Window x11_window;
+#endif /* HAVE_TEXTMODE_X11_SUPPORT */
+
+static KeySortType has_been_sorted = KEY_NOSORT;
+
+/* *INDENT-OFF* */
+static const size_t key_conv_tab_size = G_N_ELEMENTS (key_name_conv_tab) - 1;
+/* *INDENT-ON* */
+
+static const key_code_name_t *key_conv_tab_sorted[G_N_ELEMENTS (key_name_conv_tab) - 1];
+
+/* --------------------------------------------------------------------------------------------- */
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+select_cmp_by_fd_set (gconstpointer a, gconstpointer b)
+{
+    const select_t *s = (const select_t *) a;
+    const fd_set *f = (const fd_set *) b;
+
+    return (FD_ISSET (s->fd, f) ? 0 : 1);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+select_cmp_by_fd (gconstpointer a, gconstpointer b)
+{
+    const select_t *s = (const select_t *) a;
+    const int fd = GPOINTER_TO_INT (b);
+
+    return (s->fd == fd ? 0 : 1);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+add_selects (fd_set * select_set)
+{
+    int top_fd = 0;
+
+    if (disabled_channels == 0)
+    {
+        GSList *s;
+
+        for (s = select_list; s != NULL; s = g_slist_next (s))
+        {
+            select_t *p = (select_t *) s->data;
+
+            FD_SET (p->fd, select_set);
+            if (p->fd > top_fd)
+                top_fd = p->fd;
+        }
+    }
+
+    return top_fd;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+check_selects (fd_set * select_set)
+{
+    while (disabled_channels == 0)
+    {
+        GSList *s;
+        select_t *p;
+
+        s = g_slist_find_custom (select_list, select_set, select_cmp_by_fd_set);
+        if (s == NULL)
+            break;
+
+        p = (select_t *) s->data;
+        FD_CLR (p->fd, select_set);
+        p->callback (p->fd, p->info);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/* If set timeout is set, then we wait 0.1 seconds, else, we block */
+
+static void
+try_channels (gboolean set_timeout)
+{
+    struct timeval time_out;
+    static fd_set select_set;
+
+    while (TRUE)
+    {
+        struct timeval *timeptr = NULL;
+        int maxfdp, v;
+
+        FD_ZERO (&select_set);
+        FD_SET (input_fd, &select_set); /* Add stdin */
+        maxfdp = MAX (add_selects (&select_set), input_fd);
+
+        if (set_timeout)
+        {
+            time_out.tv_sec = 0;
+            time_out.tv_usec = 100 * MC_USEC_PER_MSEC;
+            timeptr = &time_out;
+        }
+
+        v = select (maxfdp + 1, &select_set, NULL, NULL, timeptr);
+        if (v > 0)
+        {
+            check_selects (&select_set);
+            if (FD_ISSET (input_fd, &select_set))
+                break;
+        }
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static key_def *
+create_sequence (const char *seq, int code, int action)
+{
+    key_def *base, *p, *attach;
+
+    for (base = attach = NULL; *seq != '\0'; seq++)
+    {
+        p = g_new (key_def, 1);
+        if (base == NULL)
+            base = p;
+        if (attach != NULL)
+            attach->child = p;
+
+        p->ch = *seq;
+        p->code = code;
+        p->child = p->next = NULL;
+        if (seq[1] == '\0')
+            p->action = action;
+        else
+            p->action = MCKEY_NOACTION;
+        attach = p;
+    }
+    return base;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+define_sequences (const key_define_t * kd)
+{
+    int i;
+
+    for (i = 0; kd[i].code != 0; i++)
+        define_sequence (kd[i].code, kd[i].seq, kd[i].action);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+#ifdef HAVE_TEXTMODE_X11_SUPPORT
+static void
+init_key_x11 (void)
+{
+    if (getenv ("DISPLAY") != NULL && !mc_global.tty.disable_x11)
+    {
+        x11_display = mc_XOpenDisplay (0);
+
+        if (x11_display != NULL)
+            x11_window = DefaultRootWindow (x11_display);
+    }
+}
+#endif /* HAVE_TEXTMODE_X11_SUPPORT */
+
+/* --------------------------------------------------------------------------------------------- */
+/* Workaround for System V Curses vt100 bug */
+
+static int
+getch_with_delay (void)
+{
+    int c;
+
+    /* This routine could be used on systems without mouse support,
+       so we need to do the select check :-( */
+    while (TRUE)
+    {
+        if (pending_keys == NULL)
+            try_channels (FALSE);
+
+        /* Try to get a character */
+        c = get_key_code (0);
+        if (c != -1)
+            break;
+
+        /* Failed -> wait 0.1 secs and try again */
+        try_channels (TRUE);
+    }
+
+    /* Success -> return the character */
+    return c;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+xmouse_get_event (Gpm_Event * ev, gboolean extended)
+{
+    static gint64 tv1 = 0;      /* Force first click as single */
+    static int clicks = 0;
+    static int last_btn = 0;
+    int btn;
+
+    /* Decode Xterm mouse information to a GPM style event */
+
+    if (!extended)
+    {
+        /* Variable btn has following meaning: */
+        /* 0 = btn1 dn, 1 = btn2 dn, 2 = btn3 dn, 3 = btn up */
+        btn = tty_lowlevel_getch () - 32;
+        /* Coordinates are 33-based */
+        /* Transform them to 1-based */
+        ev->x = tty_lowlevel_getch () - 32;
+        ev->y = tty_lowlevel_getch () - 32;
+    }
+    else
+    {
+        /* SGR 1006 extension (e.g. "\e[<0;12;300M"):
+           - Numbers are encoded in decimal to make it ASCII-safe
+           and to overcome the limit of 223 columns/rows.
+           - Mouse release is encoded by trailing 'm' rather than 'M'
+           so that the released button can be reported.
+           - Numbers are no longer offset by 32. */
+        char c;
+
+        btn = ev->x = ev->y = 0;
+        ev->type = 0;           /* In case we return on an invalid sequence */
+
+        while ((c = tty_lowlevel_getch ()) != ';')
+        {
+            if (c < '0' || c > '9')
+                return;
+            btn = 10 * btn + (c - '0');
+        }
+        while ((c = tty_lowlevel_getch ()) != ';')
+        {
+            if (c < '0' || c > '9')
+                return;
+            ev->x = 10 * ev->x + (c - '0');
+        }
+        while ((c = tty_lowlevel_getch ()) != 'M' && c != 'm')
+        {
+            if (c < '0' || c > '9')
+                return;
+            ev->y = 10 * ev->y + (c - '0');
+        }
+        /* Legacy mouse protocol doesn't tell which button was released,
+           conveniently all of mc's widgets are written not to rely on this
+           information. With the SGR extension the released button becomes
+           known, but for the sake of simplicity we just ignore it. */
+        if (c == 'm')
+            btn = 3;
+    }
+
+    /* There seems to be no way of knowing which button was released */
+    /* So we assume all the buttons were released */
+
+    if (btn == 3)
+    {
+        if (last_btn != 0)
+        {
+            if ((last_btn & (GPM_B_UP | GPM_B_DOWN)) != 0)
+            {
+                /* FIXME: DIRTY HACK */
+                /* don't generate GPM_UP after mouse wheel */
+                /* need for menu event handling */
+                ev->type = 0;
+                tv1 = 0;
+            }
+            else
+            {
+                ev->type = GPM_UP | (GPM_SINGLE << clicks);
+                tv1 = g_get_monotonic_time ();
+            }
+            ev->buttons = 0;
+            last_btn = 0;
+            clicks = 0;
+        }
+        else
+        {
+            /* Bogus event, maybe mouse wheel */
+            ev->type = 0;
+        }
+    }
+    else
+    {
+        gint64 tv2;
+
+        if (btn >= 32 && btn <= 34)
+        {
+            btn -= 32;
+            ev->type = GPM_DRAG;
+        }
+        else
+            ev->type = GPM_DOWN;
+
+        tv2 = g_get_monotonic_time ();
+        if (tv1 != 0 && tv2 - tv1 < (gint64) double_click_speed * MC_USEC_PER_MSEC)
+        {
+            clicks++;
+            clicks %= 3;
+        }
+        else
+            clicks = 0;
+
+        switch (btn)
+        {
+        case 0:
+            ev->buttons = GPM_B_LEFT;
+            break;
+        case 1:
+            ev->buttons = GPM_B_MIDDLE;
+            break;
+        case 2:
+            ev->buttons = GPM_B_RIGHT;
+            break;
+        case 64:
+            ev->buttons = GPM_B_UP;
+            clicks = 0;
+            break;
+        case 65:
+            ev->buttons = GPM_B_DOWN;
+            clicks = 0;
+            break;
+        default:
+            /* Nothing */
+            ev->type = 0;
+            ev->buttons = 0;
+            break;
+        }
+        last_btn = ev->buttons;
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/**
+ * Get modifier state (shift, alt, ctrl) for the last key pressed.
+ * We are assuming that the state didn't change since the key press.
+ * This is only correct if get_modifier() is called very fast after
+ * the input was received, so that the user didn't release the
+ * modifier keys yet.
+ */
+
+static int
+get_modifier (void)
+{
+    int result = 0;
+#ifdef __QNXNTO__
+    static int in_photon = 0;
+    static int ph_ig = 0;
+#endif /* __QNXNTO__ */
+
+#ifdef HAVE_TEXTMODE_X11_SUPPORT
+    if (x11_window != 0)
+    {
+        Window root, child;
+        int root_x, root_y;
+        int win_x, win_y;
+        unsigned int mask;
+
+        mc_XQueryPointer (x11_display, x11_window, &root, &child, &root_x,
+                          &root_y, &win_x, &win_y, &mask);
+
+        if ((mask & ShiftMask) != 0)
+            result |= KEY_M_SHIFT;
+        if ((mask & ControlMask) != 0)
+            result |= KEY_M_CTRL;
+        return result;
+    }
+#endif /* HAVE_TEXTMODE_X11_SUPPORT */
+
+#ifdef __QNXNTO__
+    if (in_photon == 0)
+    {
+        /* First time here, let's load Photon library and attach to Photon */
+        in_photon = -1;
+
+        if (getenv ("PHOTON2_PATH") != NULL)
+        {
+            /* QNX 6.x has no support for RTLD_LAZY */
+            void *ph_handle;
+
+            ph_handle = dlopen ("/usr/lib/libph.so", RTLD_NOW);
+            if (ph_handle != NULL)
+            {
+                ph_attach = (ph_dv_f) dlsym (ph_handle, "PhAttach");
+                ph_input_group = (ph_ov_f) dlsym (ph_handle, "PhInputGroup");
+                ph_query_cursor = (ph_pqc_f) dlsym (ph_handle, "PhQueryCursor");
+                if ((ph_attach != NULL) && (ph_input_group != NULL) && (ph_query_cursor != NULL)
+                    && (*ph_attach) (0, 0) != NULL)
+                {
+                    /* Attached */
+                    ph_ig = (*ph_input_group) (0);
+                    in_photon = 1;
+                }
+            }
+        }
+    }
+    /* We do not have Photon running. Assume we are in text console or xterm */
+    if (in_photon == -1)
+    {
+        int mod_status;
+        int shift_ext_status;
+
+        if (devctl (fileno (stdin), DCMD_CHR_LINESTATUS, &mod_status, sizeof (mod_status), NULL) ==
+            -1)
+            return 0;
+
+        shift_ext_status = mod_status & 0xffffff00UL;
+        mod_status &= 0x7f;
+        if ((mod_status & _LINESTATUS_CON_ALT) != 0)
+            result |= KEY_M_ALT;
+        if ((mod_status & _LINESTATUS_CON_CTRL) != 0)
+            result |= KEY_M_CTRL;
+        if ((mod_status & _LINESTATUS_CON_SHIFT) != 0 || (shift_ext_status & 0x00000800UL) != 0)
+            result |= KEY_M_SHIFT;
+    }
+    else
+    {
+        PhCursorInfo_t cursor_info;
+
+        (*ph_query_cursor) (ph_ig, &cursor_info);
+        if ((cursor_info.key_mods & 0x04) != 0)
+            result |= KEY_M_ALT;
+        if ((cursor_info.key_mods & 0x02) != 0)
+            result |= KEY_M_CTRL;
+        if ((cursor_info.key_mods & 0x01) != 0)
+            result |= KEY_M_SHIFT;
+    }
+#endif /* __QNXNTO__ */
+
+#if defined __linux__ || (defined __CYGWIN__ && defined TIOCLINUX)
+    {
+        unsigned char modifiers = 6;
+
+        if (ioctl (0, TIOCLINUX, &modifiers) < 0)
+            return 0;
+
+        /* Translate Linux modifiers into mc modifiers */
+        if ((modifiers & SHIFT_PRESSED) != 0)
+            result |= KEY_M_SHIFT;
+        if ((modifiers & (ALTL_PRESSED | ALTR_PRESSED)) != 0)
+            result |= KEY_M_ALT;
+        if ((modifiers & CONTROL_PRESSED) != 0)
+            result |= KEY_M_CTRL;
+    }
+#endif /* !__linux__ */
+
+    return result;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static gboolean
+push_char (int c)
+{
+    gboolean ret = FALSE;
+
+    if (seq_append == NULL)
+        seq_append = seq_buffer;
+
+    if (seq_append != &(seq_buffer[SEQ_BUFFER_LEN - 2]))
+    {
+        *(seq_append++) = c;
+        *seq_append = '\0';
+        ret = TRUE;
+    }
+
+    return ret;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/* Apply corrections for the keycode generated in get_key_code() */
+
+static int
+correct_key_code (int code)
+{
+    unsigned int c = code & ~KEY_M_MASK;        /* code without modifier */
+    unsigned int mod = code & KEY_M_MASK;       /* modifier */
+#ifdef __QNXNTO__
+    unsigned int qmod;          /* bunch of the QNX console
+                                   modifiers needs unchanged */
+#endif /* __QNXNTO__ */
+
+    /*
+     * Add key modifiers directly from X11 or OS.
+     * Ordinary characters only get modifiers from sequences.
+     */
+    if (c < 32 || c >= 256)
+        mod |= get_modifier ();
+
+    /* This is needed if the newline is reported as carriage return */
+    if (c == '\r')
+        c = '\n';
+
+    /* This is reported to be useful on AIX */
+    if (c == KEY_SCANCEL)
+        c = '\t';
+
+    /* Convert Back Tab to Shift+Tab */
+    if (c == KEY_BTAB)
+    {
+        c = '\t';
+        mod = KEY_M_SHIFT;
+    }
+
+    /* F0 is the same as F10 for out purposes */
+    if (c == KEY_F (0))
+        c = KEY_F (10);
+
+    /*
+     * We are not interested if Ctrl was pressed when entering control
+     * characters, so assume that it was.  When checking for such keys,
+     * XCTRL macro should be used.  In some cases, we are interested,
+     * e.g. to distinguish Ctrl-Enter from Enter.
+     */
+    if (c == '\b')
+    {
+        /* Special case for backspase ('\b' < 32) */
+        c = KEY_BACKSPACE;
+        mod &= ~KEY_M_CTRL;
+    }
+    else if (c < 32 && c != ESC_CHAR && c != '\t' && c != '\n')
+        mod |= KEY_M_CTRL;
+
+#ifdef __QNXNTO__
+    qmod = get_modifier ();
+
+    if (c == 127 && mod == 0)
+    {
+        /* Add Ctrl/Alt/Shift-BackSpace */
+        mod |= get_modifier ();
+        c = KEY_BACKSPACE;
+    }
+
+    if (c == '0' && mod == 0 && (qmod & KEY_M_SHIFT) == KEY_M_SHIFT)
+    {
+        /* Add Shift-Insert on key pad */
+        mod = KEY_M_SHIFT;
+        c = KEY_IC;
+    }
+
+    if (c == '.' && mod == 0 && (qmod & KEY_M_SHIFT) == KEY_M_SHIFT)
+    {
+        /* Add Shift-Del on key pad */
+        mod = KEY_M_SHIFT;
+        c = KEY_DC;
+    }
+#endif /* __QNXNTO__ */
+
+    /* Unrecognized 0177 is delete (preserve Ctrl) */
+    if (c == 0177)
+        c = KEY_BACKSPACE;
+
+#if 0
+    /* Unrecognized Ctrl-d is delete */
+    if (c == 'd' & 31)
+    {
+        c = KEY_DC;
+        mod &= ~KEY_M_CTRL;
+    }
+
+    /* Unrecognized Ctrl-h is backspace */
+    if (c == 'h' & 31)
+    {
+        c = KEY_BACKSPACE;
+        mod &= ~KEY_M_CTRL;
+    }
+#endif
+
+    /* Shift+BackSpace is backspace */
+    if (c == KEY_BACKSPACE && (mod & KEY_M_SHIFT) != 0)
+        mod &= ~KEY_M_SHIFT;
+
+    /* Convert Shift+Fn to F(n+10) */
+    if (c >= KEY_F (1) && c <= KEY_F (10) && (mod & KEY_M_SHIFT) != 0)
+        c += 10;
+
+    /* Remove Shift information from function keys */
+    if (c >= KEY_F (1) && c <= KEY_F (20))
+        mod &= ~KEY_M_SHIFT;
+
+    if (!mc_global.tty.alternate_plus_minus)
+        switch (c)
+        {
+        case KEY_KP_ADD:
+            c = '+';
+            break;
+        case KEY_KP_SUBTRACT:
+            c = '-';
+            break;
+        case KEY_KP_MULTIPLY:
+            c = '*';
+            break;
+        default:
+            break;
+        }
+
+    return (mod | c);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+getch_with_timeout (unsigned int delay_us)
+{
+    fd_set Read_FD_Set;
+    int c;
+    struct timeval time_out;
+
+    time_out.tv_sec = delay_us / G_USEC_PER_SEC;
+    time_out.tv_usec = delay_us % G_USEC_PER_SEC;
+    tty_nodelay (TRUE);
+    FD_ZERO (&Read_FD_Set);
+    FD_SET (input_fd, &Read_FD_Set);
+    select (input_fd + 1, &Read_FD_Set, NULL, NULL, &time_out);
+    c = tty_lowlevel_getch ();
+    tty_nodelay (FALSE);
+    return c;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+learn_store_key (char *buffer, char **p, int c)
+{
+    if (*p - buffer > 253)
+        return;
+
+    if (c == ESC_CHAR)
+    {
+        *(*p)++ = '\\';
+        *(*p)++ = 'e';
+    }
+    else if (c < ' ')
+    {
+        *(*p)++ = '^';
+        *(*p)++ = c + 'a' - 1;
+    }
+    else if (c == '^')
+    {
+        *(*p)++ = '^';
+        *(*p)++ = '^';
+    }
+    else
+        *(*p)++ = (char) c;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+k_dispose (key_def * k)
+{
+    if (k != NULL)
+    {
+        k_dispose (k->child);
+        k_dispose (k->next);
+        g_free (k);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+key_code_comparator_by_name (const void *p1, const void *p2)
+{
+    const key_code_name_t *n1 = *(const key_code_name_t * const *) p1;
+    const key_code_name_t *n2 = *(const key_code_name_t * const *) p2;
+
+    return g_ascii_strcasecmp (n1->name, n2->name);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+key_code_comparator_by_code (const void *p1, const void *p2)
+{
+    const key_code_name_t *n1 = *(const key_code_name_t * const *) p1;
+    const key_code_name_t *n2 = *(const key_code_name_t * const *) p2;
+
+    return n1->code - n2->code;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static inline void
+sort_key_conv_tab (enum KeySortType type_sort)
+{
+    if (has_been_sorted != type_sort)
+    {
+        size_t i;
+
+        for (i = 0; i < key_conv_tab_size; i++)
+            key_conv_tab_sorted[i] = &key_name_conv_tab[i];
+
+        if (type_sort == KEY_SORTBYNAME)
+            qsort (key_conv_tab_sorted, key_conv_tab_size, sizeof (key_conv_tab_sorted[0]),
+                   &key_code_comparator_by_name);
+        else if (type_sort == KEY_SORTBYCODE)
+            qsort (key_conv_tab_sorted, key_conv_tab_size, sizeof (key_conv_tab_sorted[0]),
+                   &key_code_comparator_by_code);
+
+        has_been_sorted = type_sort;
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+lookup_keyname (const char *name, int *idx)
+{
+    if (name[0] != '\0')
+    {
+        const key_code_name_t key = { 0, name, NULL, NULL };
+        const key_code_name_t *keyp = &key;
+        const key_code_name_t **res;
+
+        if (name[1] == '\0')
+        {
+            *idx = -1;
+            return (int) name[0];
+        }
+
+        sort_key_conv_tab (KEY_SORTBYNAME);
+
+        res = bsearch (&keyp, key_conv_tab_sorted, key_conv_tab_size,
+                       sizeof (key_conv_tab_sorted[0]), key_code_comparator_by_name);
+
+        if (res != NULL)
+        {
+            *idx = (int) (res - key_conv_tab_sorted);
+            return (*res)->code;
+        }
+    }
+
+    *idx = -1;
+    return 0;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static gboolean
+lookup_keycode (const long code, int *idx)
+{
+    if (code != 0)
+    {
+        const key_code_name_t key = { code, NULL, NULL, NULL };
+        const key_code_name_t *keyp = &key;
+        const key_code_name_t **res;
+
+        sort_key_conv_tab (KEY_SORTBYCODE);
+
+        res = bsearch (&keyp, key_conv_tab_sorted, key_conv_tab_size,
+                       sizeof (key_conv_tab_sorted[0]), key_code_comparator_by_code);
+
+        if (res != NULL)
+        {
+            *idx = (int) (res - key_conv_tab_sorted);
+            return TRUE;
+        }
+    }
+
+    *idx = -1;
+    return FALSE;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+/* This has to be called before init_slang or whatever routine
+   calls any define_sequence */
+
+void
+init_key (void)
+{
+    const char *term;
+
+    term = getenv ("TERM");
+
+    /* This has to be the first define_sequence */
+    /* So, we can assume that the first keys member has ESC */
+    define_sequences (mc_default_keys);
+
+    /* Terminfo on irix does not have some keys */
+    if (mc_global.tty.xterm_flag
+        || (term != NULL
+            && (strncmp (term, "iris-ansi", 9) == 0
+                || strncmp (term, "xterm", 5) == 0
+                || strncmp (term, "rxvt", 4) == 0 || strncmp (term, "screen", 6) == 0)))
+        define_sequences (xterm_key_defines);
+
+    /* load some additional keys (e.g. direct Alt-? support) */
+    load_xtra_key_defines ();
+
+#ifdef __QNX__
+    if ((term != NULL) && (strncmp (term, "qnx", 3) == 0))
+    {
+        /* Modify the default value of use_8th_bit_as_meta: we would
+         * like to provide a working mc for a newbie who knows nothing
+         * about [Options|Display bits|Full 8 bits input]...
+         *
+         * Don't use 'meta'-bit, when we are dealing with a
+         * 'qnx*'-type terminal: clear the default value!
+         * These terminal types use 0xFF as an escape character,
+         * so use_8th_bit_as_meta==1 must not be enabled!
+         *
+         * [mc-4.1.21+,slint.c/getch(): the DEC_8BIT_HACK stuff
+         * is not used now (doesn't even depend on use_8th_bit_as_meta
+         * as in mc-3.1.2)...GREAT!...no additional code is required!]
+         */
+        use_8th_bit_as_meta = FALSE;
+    }
+#endif /* __QNX__ */
+
+#ifdef HAVE_TEXTMODE_X11_SUPPORT
+    init_key_x11 ();
+#endif
+
+    /* Load the qansi-m key definitions
+       if we are running under the qansi-m terminal */
+    if (term != NULL && (strncmp (term, "qansi-m", 7) == 0))
+        define_sequences (qansi_key_defines);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/**
+ * This has to be called after SLang_init_tty/slint_init
+ */
+
+void
+init_key_input_fd (void)
+{
+#ifdef HAVE_SLANG
+    input_fd = SLang_TT_Read_FD;
+#endif
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+done_key (void)
+{
+    k_dispose (keys);
+    g_slist_free_full (select_list, g_free);
+
+#ifdef HAVE_TEXTMODE_X11_SUPPORT
+    if (x11_display)
+        mc_XCloseDisplay (x11_display);
+#endif
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+add_select_channel (int fd, select_fn callback, void *info)
+{
+    select_t *new;
+
+    new = g_new (select_t, 1);
+    new->fd = fd;
+    new->callback = callback;
+    new->info = info;
+
+    select_list = g_slist_prepend (select_list, new);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+delete_select_channel (int fd)
+{
+    GSList *p;
+
+    p = g_slist_find_custom (select_list, GINT_TO_POINTER (fd), select_cmp_by_fd);
+    if (p != NULL)
+        select_list = g_slist_delete_link (select_list, p);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+channels_up (void)
+{
+    if (disabled_channels == 0)
+        fputs ("Error: channels_up called with disabled_channels = 0\n", stderr);
+    disabled_channels--;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+channels_down (void)
+{
+    disabled_channels++;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/**
+ * Return the code associated with the symbolic name keyname
+ */
+
+long
+lookup_key (const char *name, char **label)
+{
+    char **lc_keys, **p;
+    char *cname;
+    int k = -1;
+    int key = 0;
+    int lc_index = -1;
+
+    int use_meta = -1;
+    int use_ctrl = -1;
+    int use_shift = -1;
+
+    if (name == NULL)
+        return 0;
+
+    cname = g_strstrip (g_strdup (name));
+    lc_keys = g_strsplit_set (cname, "-+ ", -1);
+    g_free (cname);
+
+    for (p = lc_keys; p != NULL && *p != NULL; p++)
+    {
+        if ((*p)[0] != '\0')
+        {
+            int idx;
+
+            key = lookup_keyname (g_strstrip (*p), &idx);
+
+            if (key == KEY_M_ALT)
+                use_meta = idx;
+            else if (key == KEY_M_CTRL)
+                use_ctrl = idx;
+            else if (key == KEY_M_SHIFT)
+                use_shift = idx;
+            else
+            {
+                k = key;
+                lc_index = idx;
+                break;
+            }
+        }
+    }
+
+    g_strfreev (lc_keys);
+
+    /* output */
+    if (k <= 0)
+        return 0;
+
+    if (label != NULL)
+    {
+        GString *s;
+
+        s = g_string_new ("");
+
+        if (use_meta != -1)
+        {
+            g_string_append (s, key_conv_tab_sorted[use_meta]->shortcut);
+            g_string_append_c (s, '-');
+        }
+        if (use_ctrl != -1)
+        {
+            g_string_append (s, key_conv_tab_sorted[use_ctrl]->shortcut);
+            g_string_append_c (s, '-');
+        }
+        if (use_shift != -1)
+        {
+            if (k < 127)
+                g_string_append_c (s, (gchar) g_ascii_toupper ((gchar) k));
+            else
+            {
+                g_string_append (s, key_conv_tab_sorted[use_shift]->shortcut);
+                g_string_append_c (s, '-');
+                g_string_append (s, key_conv_tab_sorted[lc_index]->shortcut);
+            }
+        }
+        else if (k < 128)
+        {
+            if ((k >= 'A') || (lc_index < 0) || (key_conv_tab_sorted[lc_index]->shortcut == NULL))
+                g_string_append_c (s, (gchar) g_ascii_tolower ((gchar) k));
+            else
+                g_string_append (s, key_conv_tab_sorted[lc_index]->shortcut);
+        }
+        else if ((lc_index != -1) && (key_conv_tab_sorted[lc_index]->shortcut != NULL))
+            g_string_append (s, key_conv_tab_sorted[lc_index]->shortcut);
+        else
+            g_string_append_c (s, (gchar) g_ascii_tolower ((gchar) key));
+
+        *label = g_string_free (s, FALSE);
+    }
+
+    if (use_shift != -1)
+    {
+        if (k < 127 && k > 31)
+            k = g_ascii_toupper ((gchar) k);
+        else
+            k |= KEY_M_SHIFT;
+    }
+
+    if (use_ctrl != -1)
+    {
+        if (k < 256)
+            k = XCTRL (k);
+        else
+            k |= KEY_M_CTRL;
+    }
+
+    if (use_meta != -1)
+        k = ALT (k);
+
+    return (long) k;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+char *
+lookup_key_by_code (const int keycode)
+{
+    /* code without modifier */
+    unsigned int k = keycode & ~KEY_M_MASK;
+    /* modifier */
+    unsigned int mod = keycode & KEY_M_MASK;
+
+    int key_idx = -1;
+
+    GString *s;
+    int idx;
+
+    s = g_string_sized_new (8);
+
+    if (lookup_keycode (k, &key_idx) || (k > 0 && k < 256))
+    {
+        if ((mod & KEY_M_ALT) != 0 && lookup_keycode (KEY_M_ALT, &idx))
+        {
+            g_string_append (s, key_conv_tab_sorted[idx]->name);
+            g_string_append_c (s, '-');
+        }
+
+        if ((mod & KEY_M_CTRL) != 0)
+        {
+            /* non printeble chars like a CTRL-[A..Z] */
+            if (k < 32)
+                k += 64;
+
+            if (lookup_keycode (KEY_M_CTRL, &idx))
+            {
+                g_string_append (s, key_conv_tab_sorted[idx]->name);
+                g_string_append_c (s, '-');
+            }
+        }
+
+        if ((mod & KEY_M_SHIFT) != 0)
+        {
+            if (lookup_keycode (KEY_M_ALT, &idx))
+            {
+                if (k < 127)
+                    g_string_append_c (s, (gchar) g_ascii_toupper ((gchar) k));
+                else
+                {
+                    g_string_append (s, key_conv_tab_sorted[idx]->name);
+                    g_string_append_c (s, '-');
+                    g_string_append (s, key_conv_tab_sorted[key_idx]->name);
+                }
+            }
+        }
+        else if (k < 128)
+        {
+            if ((k >= 'A') || (key_idx < 0) || (key_conv_tab_sorted[key_idx]->name == NULL))
+                g_string_append_c (s, (gchar) k);
+            else
+                g_string_append (s, key_conv_tab_sorted[key_idx]->name);
+        }
+        else if ((key_idx != -1) && (key_conv_tab_sorted[key_idx]->name != NULL))
+            g_string_append (s, key_conv_tab_sorted[key_idx]->name);
+        else
+            g_string_append_c (s, (gchar) keycode);
+    }
+
+    return g_string_free (s, s->len == 0);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/**
+ * Return TRUE on success, FALSE on error.
+ * An error happens if SEQ is a beginning of an existing longer sequence.
+ */
+
+gboolean
+define_sequence (int code, const char *seq, int action)
+{
+    key_def *base;
+
+    if (strlen (seq) > SEQ_BUFFER_LEN - 1)
+        return FALSE;
+
+    for (base = keys; (base != NULL) && (*seq != '\0');)
+        if (*seq == base->ch)
+        {
+            if (base->child == NULL)
+            {
+                if (*(seq + 1) != '\0')
+                    base->child = create_sequence (seq + 1, code, action);
+                else
+                {
+                    /* The sequence matches an existing one.  */
+                    base->code = code;
+                    base->action = action;
+                }
+                return TRUE;
+            }
+
+            base = base->child;
+            seq++;
+        }
+        else
+        {
+            if (base->next != NULL)
+                base = base->next;
+            else
+            {
+                base->next = create_sequence (seq, code, action);
+                return TRUE;
+            }
+        }
+
+    if (*seq == '\0')
+    {
+        /* Attempt to redefine a sequence with a shorter sequence.  */
+        return FALSE;
+    }
+
+    keys = create_sequence (seq, code, action);
+    return TRUE;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/**
+ * Check if we are idle, i.e. there are no pending keyboard or mouse
+ * events.  Return 1 is idle, 0 is there are pending events.
+ */
+gboolean
+is_idle (void)
+{
+    int nfd;
+    fd_set select_set;
+    struct timeval time_out;
+
+    FD_ZERO (&select_set);
+    FD_SET (input_fd, &select_set);
+    nfd = MAX (0, input_fd) + 1;
+    time_out.tv_sec = 0;
+    time_out.tv_usec = 0;
+#ifdef HAVE_LIBGPM
+    if (mouse_enabled && use_mouse_p == MOUSE_GPM)
+    {
+        if (gpm_fd >= 0)
+        {
+            FD_SET (gpm_fd, &select_set);
+            nfd = MAX (nfd, gpm_fd + 1);
+        }
+        else
+        {
+            if (mouse_fd >= 0)  /* error indicative */
+            {
+                if (FD_ISSET (mouse_fd, &select_set))
+                    FD_CLR (mouse_fd, &select_set);
+                mouse_fd = gpm_fd;
+            }
+            /* gpm_fd == -2 means under some X terminal */
+            if (gpm_fd == -1)
+            {
+                mouse_enabled = FALSE;
+                use_mouse_p = MOUSE_NONE;
+            }
+        }
+    }
+#endif
+    return (select (nfd, &select_set, 0, 0, &time_out) <= 0);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+int
+get_key_code (int no_delay)
+{
+    int c;
+    static key_def *this = NULL, *parent;
+    static gint64 esc_time = -1;
+    static int lastnodelay = -1;
+
+    if (no_delay != lastnodelay)
+    {
+        this = NULL;
+        lastnodelay = no_delay;
+    }
+
+  pend_send:
+    if (pending_keys != NULL)
+    {
+        gboolean bad_seq;
+
+        c = *pending_keys++;
+        while (c == ESC_CHAR)
+            c = ALT (*pending_keys++);
+
+        bad_seq = (*pending_keys != ESC_CHAR && *pending_keys != '\0');
+        if (*pending_keys == '\0' || bad_seq)
+            pending_keys = seq_append = NULL;
+
+        if (bad_seq)
+        {
+            /* This is an unknown ESC sequence.
+             * To prevent interpreting its tail as a random garbage,
+             * eat and discard all buffered and quickly following chars.
+             * Small, but non-zero timeout is needed to reconnect
+             * escape sequence split up by e.g. a serial line.
+             */
+            int paranoia = 20;
+
+            while (getch_with_timeout (old_esc_mode_timeout) >= 0 && --paranoia != 0)
+                ;
+        }
+        else
+        {
+            if (c > 127 && c < 256 && use_8th_bit_as_meta)
+                c = ALT (c & 0x7f);
+
+            goto done;
+        }
+    }
+
+  nodelay_try_again:
+    if (no_delay != 0)
+        tty_nodelay (TRUE);
+
+    c = tty_lowlevel_getch ();
+#if (defined(USE_NCURSES) || defined(USE_NCURSESW)) && defined(KEY_RESIZE)
+    if (c == KEY_RESIZE)
+        goto nodelay_try_again;
+#endif
+
+    if (no_delay != 0)
+    {
+        tty_nodelay (FALSE);
+        if (c == -1)
+        {
+            if (this == NULL || parent == NULL || parent->action != MCKEY_ESCAPE || !old_esc_mode ||
+                esc_time == -1 || g_get_monotonic_time () < esc_time + old_esc_mode_timeout)
+                return -1;
+
+            this = NULL;
+            pending_keys = seq_append = NULL;
+            return ESC_CHAR;
+        }
+    }
+    else if (c == -1)
+    {
+        /* Maybe we got an incomplete match.
+           This we do only in delay mode, since otherwise
+           tty_lowlevel_getch can return -1 at any time. */
+        if (seq_append == NULL)
+        {
+            this = NULL;
+            return -1;
+        }
+
+        pending_keys = seq_buffer;
+        goto pend_send;
+    }
+
+    /* Search the key on the root */
+    if (no_delay == 0 || this == NULL)
+    {
+        this = keys;
+        parent = NULL;
+
+        if (c > 127 && c < 256 && use_8th_bit_as_meta)
+        {
+            c &= 0x7f;
+
+            /* The first sequence defined starts with esc */
+            parent = keys;
+            this = keys->child;
+        }
+    }
+
+    while (this != NULL)
+    {
+        if (c == this->ch)
+        {
+            if (this->child == NULL)
+            {
+                /* We got a complete match, return and reset search */
+                pending_keys = seq_append = NULL;
+                c = this->code;
+                goto done;
+            }
+
+            /* No match yet, but it may be a prefix for a valid seq */
+            if (!push_char (c))
+            {
+                pending_keys = seq_buffer;
+                goto pend_send;
+            }
+
+            parent = this;
+            this = this->child;
+            if (parent->action == MCKEY_ESCAPE && old_esc_mode)
+            {
+                if (no_delay != 0)
+                {
+                    esc_time = g_get_monotonic_time ();
+                    goto nodelay_try_again;
+                }
+
+                esc_time = -1;
+                c = getch_with_timeout (old_esc_mode_timeout);
+                if (c != -1)
+                    continue;
+
+                pending_keys = seq_append = NULL;
+                this = NULL;
+                return ESC_CHAR;
+            }
+
+            if (no_delay != 0)
+                goto nodelay_try_again;
+            c = tty_lowlevel_getch ();
+            continue;
+        }
+
+        /* c != this->ch. Try other keys with this prefix */
+        if (this->next != NULL)
+        {
+            this = this->next;
+            continue;
+        }
+
+        /* No match found. Is it one of our ESC <key> specials? */
+        if ((parent != NULL) && (parent->action == MCKEY_ESCAPE))
+        {
+            /* Convert escape-digits to F-keys */
+            if (g_ascii_isdigit (c))
+                c = KEY_F (c - '0');
+            else if (c == ' ')
+                c = ESC_CHAR;
+            else
+                c = ALT (c);
+
+            pending_keys = seq_append = NULL;
+            goto done;
+        }
+
+        /* Unknown sequence. Maybe a prefix of a longer one. Save it. */
+        push_char (c);
+        pending_keys = seq_buffer;
+        goto pend_send;
+    }                           /* while (this != NULL) */
+
+  done:
+    this = NULL;
+    return correct_key_code (c);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/* Returns a character read from stdin with appropriate interpretation */
+/* Also takes care of generated mouse events */
+/* Returns EV_MOUSE if it is a mouse event */
+/* Returns EV_NONE  if non-blocking or interrupt set and nothing was done */
+
+int
+tty_get_event (struct Gpm_Event *event, gboolean redo_event, gboolean block)
+{
+    int c;
+    int flag = 0;               /* Return value from select */
+#ifdef HAVE_LIBGPM
+    static struct Gpm_Event ev; /* Mouse event */
+#endif
+    struct timeval time_out;
+    struct timeval *time_addr = NULL;
+    static int dirty = 3;
+
+    if ((dirty == 3) || is_idle ())
+    {
+        mc_refresh ();
+        dirty = 1;
+    }
+    else
+        dirty++;
+
+    vfs_timeout_handler ();
+
+    /* Ok, we use (event->x < 0) to signal that the event does not contain
+       a suitable position for the mouse, so we can't use show_mouse_pointer
+       on it.
+     */
+    if (event->x > 0)
+    {
+        show_mouse_pointer (event->x, event->y);
+        if (!redo_event)
+            event->x = -1;
+    }
+
+    /* Repeat if using mouse */
+    while (pending_keys == NULL)
+    {
+        int nfd;
+        fd_set select_set;
+
+        FD_ZERO (&select_set);
+        FD_SET (input_fd, &select_set);
+        nfd = MAX (add_selects (&select_set), MAX (0, input_fd)) + 1;
+
+#ifdef HAVE_LIBGPM
+        if (mouse_enabled && (use_mouse_p == MOUSE_GPM))
+        {
+            if (gpm_fd >= 0)
+            {
+                FD_SET (gpm_fd, &select_set);
+                nfd = MAX (nfd, gpm_fd + 1);
+            }
+            else
+            {
+                if (mouse_fd >= 0)      /* error indicative */
+                {
+                    if (FD_ISSET (mouse_fd, &select_set))
+                        FD_CLR (mouse_fd, &select_set);
+                    mouse_fd = gpm_fd;
+                }
+                /* gpm_fd == -2 means under some X terminal */
+                if (gpm_fd == -1)
+                {
+                    mouse_enabled = FALSE;
+                    use_mouse_p = MOUSE_NONE;
+                }
+                break;
+            }
+        }
+#endif
+
+        if (redo_event)
+        {
+            time_out.tv_usec = mou_auto_repeat * MC_USEC_PER_MSEC;
+            time_out.tv_sec = 0;
+
+            time_addr = &time_out;
+        }
+        else
+        {
+            int seconds;
+
+            seconds = vfs_timeouts ();
+            time_addr = NULL;
+
+            if (seconds != 0)
+            {
+                /* the timeout could be improved and actually be
+                 * the number of seconds until the next vfs entry
+                 * timeouts in the stamp list.
+                 */
+
+                time_out.tv_sec = seconds;
+                time_out.tv_usec = 0;
+                time_addr = &time_out;
+            }
+        }
+
+        if (!block || tty_got_winch ())
+        {
+            time_addr = &time_out;
+            time_out.tv_sec = 0;
+            time_out.tv_usec = 0;
+        }
+
+        tty_enable_interrupt_key ();
+        flag = select (nfd, &select_set, NULL, NULL, time_addr);
+        tty_disable_interrupt_key ();
+
+        /* select timed out: it could be for any of the following reasons:
+         * redo_event -> it was because of the MOU_REPEAT handler
+         * !block     -> we did not block in the select call
+         * else       -> 10 second timeout to check the vfs status.
+         */
+        if (flag == 0)
+        {
+            if (redo_event)
+                return EV_MOUSE;
+            if (!block || tty_got_winch ())
+                return EV_NONE;
+            vfs_timeout_handler ();
+        }
+        if (flag == -1 && errno == EINTR)
+            return EV_NONE;
+
+        check_selects (&select_set);
+
+        if (FD_ISSET (input_fd, &select_set))
+            break;
+
+#ifdef HAVE_LIBGPM
+        if (mouse_enabled && use_mouse_p == MOUSE_GPM)
+        {
+            if (gpm_fd >= 0)
+            {
+                if (FD_ISSET (gpm_fd, &select_set))
+                {
+                    int status;
+
+                    status = Gpm_GetEvent (&ev);
+                    if (status == 1)    /* success */
+                    {
+                        Gpm_FitEvent (&ev);
+                        *event = ev;
+                        return EV_MOUSE;
+                    }
+                    if (status <= 0)    /* connection closed; -1 == error */
+                    {
+                        if (mouse_fd >= 0 && FD_ISSET (mouse_fd, &select_set))
+                            FD_CLR (mouse_fd, &select_set);
+
+                        disable_mouse ();
+                        return EV_NONE;
+                    }
+                }
+            }
+            else
+            {
+                if (mouse_fd >= 0)      /* error indicative */
+                {
+                    if (FD_ISSET (mouse_fd, &select_set))
+                        FD_CLR (mouse_fd, &select_set);
+                    mouse_fd = gpm_fd;
+                }
+                /* gpm_fd == -2 means under some X terminal */
+                if (gpm_fd == -1)
+                {
+                    mouse_enabled = FALSE;
+                    use_mouse_p = MOUSE_NONE;
+                }
+                break;
+            }
+        }
+#endif /* !HAVE_LIBGPM */
+    }
+
+#ifndef HAVE_SLANG
+    flag = is_wintouched (stdscr);
+    untouchwin (stdscr);
+#endif /* !HAVE_SLANG */
+    c = block ? getch_with_delay () : get_key_code (1);
+
+#ifndef HAVE_SLANG
+    if (flag > 0)
+        tty_touch_screen ();
+#endif /* !HAVE_SLANG */
+
+    if (mouse_enabled && (c == MCKEY_MOUSE
+#ifdef KEY_MOUSE
+                          || c == KEY_MOUSE
+#endif /* KEY_MOUSE */
+                          || c == MCKEY_EXTENDED_MOUSE))
+    {
+        /* Mouse event. See tickets 2956 and 3954 for extended mode detection. */
+        gboolean extended = c == MCKEY_EXTENDED_MOUSE;
+
+#ifdef KEY_MOUSE
+        extended = extended || (c == KEY_MOUSE && xmouse_seq == NULL
+                                && xmouse_extended_seq != NULL);
+#endif /* KEY_MOUSE */
+
+        xmouse_get_event (event, extended);
+        c = (event->type != 0) ? EV_MOUSE : EV_NONE;
+    }
+    else if (c == MCKEY_BRACKETED_PASTING_START)
+    {
+        bracketed_pasting_in_progress = TRUE;
+        c = EV_NONE;
+    }
+    else if (c == MCKEY_BRACKETED_PASTING_END)
+    {
+        bracketed_pasting_in_progress = FALSE;
+        c = EV_NONE;
+    }
+
+    return c;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/* Returns a key press, mouse events are discarded */
+
+int
+tty_getch (void)
+{
+    Gpm_Event ev;
+    int key;
+
+    ev.x = -1;
+    while ((key = tty_get_event (&ev, FALSE, TRUE)) == EV_NONE)
+        ;
+    return key;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+char *
+learn_key (void)
+{
+    /* LEARN_TIMEOUT in ms */
+#define LEARN_TIMEOUT 200
+
+    fd_set Read_FD_Set;
+    gint64 end_time;
+    int c;
+    char buffer[256];
+    char *p = buffer;
+
+    tty_keypad (FALSE);         /* disable intepreting keys by ncurses */
+    c = tty_lowlevel_getch ();
+    while (c == -1)
+        c = tty_lowlevel_getch ();      /* Sanity check, should be unnecessary */
+    learn_store_key (buffer, &p, c);
+
+    end_time = g_get_monotonic_time () + LEARN_TIMEOUT * MC_USEC_PER_MSEC;
+
+    tty_nodelay (TRUE);
+    while (TRUE)
+    {
+        while ((c = tty_lowlevel_getch ()) == -1)
+        {
+            gint64 time_out;
+            struct timeval tv;
+
+            time_out = end_time - g_get_monotonic_time ();
+            if (time_out <= 0)
+                break;
+
+            tv.tv_sec = time_out / G_USEC_PER_SEC;
+            tv.tv_usec = time_out % G_USEC_PER_SEC;
+            FD_ZERO (&Read_FD_Set);
+            FD_SET (input_fd, &Read_FD_Set);
+            select (input_fd + 1, &Read_FD_Set, NULL, NULL, &tv);
+        }
+        if (c == -1)
+            break;
+        learn_store_key (buffer, &p, c);
+    }
+    tty_keypad (TRUE);
+    tty_nodelay (FALSE);
+    *p = '\0';
+    return (buffer[0] != '\0' ? g_strdup (buffer) : NULL);
+#undef LEARN_TIMEOUT
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/* xterm and linux console only: set keypad to numeric or application
+   mode. Only in application keypad mode it's possible to distinguish
+   the '+' key and the '+' on the keypad ('*' and '-' ditto) */
+
+void
+numeric_keypad_mode (void)
+{
+    if (mc_global.tty.console_flag != '\0' || mc_global.tty.xterm_flag)
+    {
+        fputs (ESC_STR ">", stdout);
+        fflush (stdout);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+application_keypad_mode (void)
+{
+    if (mc_global.tty.console_flag != '\0' || mc_global.tty.xterm_flag)
+    {
+        fputs (ESC_STR "=", stdout);
+        fflush (stdout);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+enable_bracketed_paste (void)
+{
+    printf (ESC_STR "[?2004h");
+    fflush (stdout);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+disable_bracketed_paste (void)
+{
+    printf (ESC_STR "[?2004l");
+    fflush (stdout);
+    bracketed_pasting_in_progress = FALSE;
+}
+
+/* --------------------------------------------------------------------------------------------- */
diff --git a/lib/tty/key.h b/lib/tty/key.h
new file mode 100644
index 0000000..5bf6b00
--- /dev/null
+++ b/lib/tty/key.h
@@ -0,0 +1,121 @@
+/** \file key.h
+ *  \brief Header: keyboard support routines
+ */
+
+#ifndef MC__KEY_H
+#define MC__KEY_H
+
+#include "lib/global.h"         /* <glib.h> */
+#include "tty.h"                /* KEY_F macro */
+
+/*** typedefs(not structures) and defined constants **********************************************/
+
+/* Possible return values from tty_get_event: */
+#define EV_MOUSE   -2
+#define EV_NONE    -1
+
+/*
+ * Internal representation of the key modifiers.  It is used in the
+ * sequence tables and the keycodes in the mc sources.
+ */
+#define KEY_M_SHIFT 0x1000
+#define KEY_M_ALT   0x2000
+#define KEY_M_CTRL  0x4000
+#define KEY_M_MASK  0x7000
+
+#define XCTRL(x) (KEY_M_CTRL | ((x) & 0x1F))
+#define ALT(x) (KEY_M_ALT | (unsigned int)(x))
+
+/* To define sequences and return codes */
+#define MCKEY_NOACTION  0
+#define MCKEY_ESCAPE    1
+
+/* Return code for the mouse sequence */
+#define MCKEY_MOUSE     -2
+
+/* Return code for the extended mouse sequence */
+#define MCKEY_EXTENDED_MOUSE     -3
+
+/* Return code for brackets of bracketed paste mode */
+#define MCKEY_BRACKETED_PASTING_START -4
+#define MCKEY_BRACKETED_PASTING_END   -5
+
+/*** enums ***************************************************************************************/
+
+/*** structures declarations (and typedefs of structures)*****************************************/
+
+typedef struct
+{
+    int code;
+    const char *name;
+    const char *longname;
+    const char *shortcut;
+} key_code_name_t;
+
+struct Gpm_Event;
+
+/*** global variables defined in .c file *********************************************************/
+
+extern const key_code_name_t key_name_conv_tab[];
+
+extern int old_esc_mode_timeout;
+
+extern int double_click_speed;
+extern gboolean old_esc_mode;
+extern gboolean use_8th_bit_as_meta;
+extern int mou_auto_repeat;
+
+extern gboolean bracketed_pasting_in_progress;
+
+/*** declarations of public functions ************************************************************/
+
+gboolean define_sequence (int code, const char *seq, int action);
+
+void init_key (void);
+void init_key_input_fd (void);
+void done_key (void);
+
+long lookup_key (const char *name, char **label);
+char *lookup_key_by_code (const int keycode);
+/* mouse support */
+int tty_get_event (struct Gpm_Event *event, gboolean redo_event, gboolean block);
+gboolean is_idle (void);
+int tty_getch (void);
+
+/* While waiting for input, the program can select on more than one file */
+typedef int (*select_fn) (int fd, void *info);
+
+/* Channel manipulation */
+void add_select_channel (int fd, select_fn callback, void *info);
+void delete_select_channel (int fd);
+
+/* Activate/deactivate the channel checking */
+void channels_up (void);
+void channels_down (void);
+
+/* internally used in key.c, defined in keyxtra.c */
+void load_xtra_key_defines (void);
+
+/* Learn a single key */
+char *learn_key (void);
+
+/* Returns a key code (interpreted) */
+int get_key_code (int nodelay);
+
+/* Set keypad mode (xterm and linux console only) */
+void numeric_keypad_mode (void);
+void application_keypad_mode (void);
+
+/* Bracketed paste mode */
+void enable_bracketed_paste (void);
+void disable_bracketed_paste (void);
+
+/*** inline functions ****************************************************************************/
+
+static inline gboolean
+is_abort_char (int c)
+{
+    return ((c == (int) ESC_CHAR) || (c == (int) KEY_F (10)));
+}
+
+#endif /* MC_KEY_H */
diff --git a/lib/tty/keyxdef.c b/lib/tty/keyxdef.c
new file mode 100644
index 0000000..edc8114
--- /dev/null
+++ b/lib/tty/keyxdef.c
@@ -0,0 +1,455 @@
+/* {{{ Copyright */
+
+/*
+   Additional keyboard support routines.
+
+   Copyright (C) 1998-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Gyorgy Tamasi, 1998
+
+   This file is part of the Midnight Commander.
+
+   The Midnight Commander is free software: you can redistribute it
+   and/or modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   The Midnight Commander 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* }}} */
+
+/** \file keyxdef.c
+ *  \brief Source: additional keyboard support routines
+ *
+ * PURPOSE:
+ *   We would like to support the direct ALT-?/META-? and some other 'extra'
+ *   keyboard functionality provided by some terminals under some OSes (and
+ *   not supported by the 'learn keys...' facility of 'mc'.
+ *   (First target platform: QNX.)
+ *
+ * REMARK:
+ *
+ *   Implementation strategy: we don't want to rely on a specific terminal
+ *   information database management API (termcap,terminfo,SLang,...), so we
+ *   try to define a superset of the possible key identifiers here.
+ *
+ */
+
+#include <config.h>
+
+#include "lib/global.h"
+
+#include "tty.h"
+#include "mouse.h"              /* required before key.h */
+#include "key.h"
+
+#if defined (__QNX__) && !defined (__QNXNTO__)
+#define HAVE_QNX_KEYS
+#endif
+
+#ifdef HAVE_QNX_KEYS
+
+/* select implementation: use QNX/term interface */
+#define __USE_QNX_TI
+
+/* implementation specific _TE() definition */
+#ifdef __USE_QNX_TI
+
+/* include QNX/term.h (not NCURSES/term.h!) */
+#if __WATCOMC__ > 1000
+#include <sys/term.h>
+#else
+#include <term.h>
+#endif
+#include <stdlib.h>             /* getenv() */
+
+/* fieldname -> index conversion */
+#define __QTISX(_qtisn) \
+	(((int)(&((struct _strs*)0)->_qtisn))/sizeof(charoffset))
+
+/* define the OS/implementation-specific __TK() format */
+#define __TK(_tis,_tcs,_tisx,_qtisn)  __QTISX(_qtisn)
+
+#endif /* __USE_QNX_TI */
+
+#endif /* HAVE_QNX_KEYS */
+
+
+/* {{{ */
+
+/* general key definitions:
+ * 
+ * format:
+ * 
+ *   terminfo name,
+ *   termcap name,
+ *   index in the terminfo string table (ncurses),
+ *   field name in the QNX terminfo strings struct
+ */
+
+/*** global variables ****************************************************************************/
+
+/*** file scope macro definitions ****************************************************************/
+
+
+#define Key_backspace   __TK("kbs",   "kb",  55, _ky_backspace )
+#define Key_catab       __TK("ktbc",  "ka",  56, _ky_catab )
+#define Key_clear       __TK("kclr",  "kC",  57, _ky_clear )
+#define Key_ctab        __TK("kctab", "kt",  58, _ky_ctab )
+#define Key_dc          __TK("kdch1", "kD",  59, _ky_dc )
+#define Key_dl          __TK("kdl1",  "kL",  60, _ky_dl )
+#define Key_down        __TK("kcud1", "kd",  61, _ky_down )
+#define Key_eic         __TK("krmir", "kM",  62, _ky_eic )
+#define Key_eol         __TK("kel",   "kE",  63, _ky_eol )
+#define Key_eos         __TK("ked",   "kS",  64, _ky_eos )
+#define Key_f0          __TK("kf0",   "k0",  65, _ky_f0 )
+#define Key_f1          __TK("kf1",   "k1",  66, _ky_f1 )
+#define Key_f10         __TK("kf10",  "k;",  67, _ky_f10 )
+#define Key_f2          __TK("kf2",   "k2",  68, _ky_f2 )
+#define Key_f3          __TK("kf3",   "k3",  69, _ky_f3 )
+#define Key_f4          __TK("kf4",   "k4",  70, _ky_f4 )
+#define Key_f5          __TK("kf5",   "k5",  71, _ky_f5 )
+#define Key_f6          __TK("kf6",   "k6",  72, _ky_f6 )
+#define Key_f7          __TK("kf7",   "k7",  73, _ky_f7 )
+#define Key_f8          __TK("kf8",   "k8",  74, _ky_f8 )
+#define Key_f9          __TK("kf9",   "k9",  75, _ky_f9 )
+#define Key_home        __TK("khome", "kh",  76, _ky_home )
+#define Key_ic          __TK("kich1", "kI",  77, _ky_ic )
+#define Key_il          __TK("kil1",  "kA",  78, _ky_il )
+#define Key_left        __TK("kcub1", "kl",  79, _ky_left )
+#define Key_ll          __TK("kll",   "kH",  80, _ky_ll )
+#define Key_npage       __TK("knp",   "kN",  81, _ky_npage )
+#define Key_ppage       __TK("kpp",   "kP",  82, _ky_ppage )
+#define Key_right       __TK("kcuf1", "kr",  83, _ky_right )
+#define Key_sf          __TK("kind",  "kF",  84, _ky_sf )
+#define Key_sr          __TK("kri",   "kR",  85, _ky_sr )
+#define Key_stab        __TK("khts",  "kT",  86, _ky_stab )
+#define Key_up          __TK("kcuu1", "ku",  87, _ky_up )
+#define Key_a1          __TK("ka1",   "K1", 139, _ky_a1 )
+#define Key_a3          __TK("ka3",   "K3", 140, _ky_a3 )
+#define Key_b2          __TK("kb2",   "K2", 141, _ky_b2 )
+#define Key_c1          __TK("kc1",   "K4", 142, _ky_c1 )
+#define Key_c3          __TK("kc3",   "K5", 143, _ky_c3 )
+#define Key_btab        __TK("kcbt",  "kB", 148, _ky_btab )
+#define Key_beg         __TK("kbeg",  "@1", 158, _ky_beg )
+#define Key_cancel      __TK("kcan",  "@2", 159, _ky_cancel )
+#define Key_close       __TK("kclo",  "@3", 160, _ky_close )
+#define Key_command     __TK("kcmd",  "@4", 161, _ky_command )
+#define Key_copy        __TK("kcpy",  "@5", 162, _ky_copy )
+#define Key_create      __TK("kcrt",  "@6", 163, _ky_create )
+#define Key_end         __TK("kend",  "@7", 164, _ky_end )
+#define Key_enter       __TK("kent",  "@8", 165, _ky_enter )
+#define Key_exit        __TK("kext",  "@9", 166, _ky_exit )
+#define Key_find        __TK("kfnd",  "@0", 167, _ky_find )
+#define Key_help        __TK("khlp",  "%1", 168, _ky_help )
+#define Key_mark        __TK("kmrk",  "%2", 169, _ky_mark )
+#define Key_message     __TK("kmsg",  "%3", 170, _ky_message )
+#define Key_move        __TK("kmov",  "%4", 171, _ky_move )
+#define Key_next        __TK("knxt",  "%5", 172, _ky_next )
+#define Key_open        __TK("kopn",  "%6", 173, _ky_open )
+#define Key_options     __TK("kopt",  "%7", 174, _ky_options )
+#define Key_previous    __TK("kprv",  "%8", 175, _ky_previous )
+#define Key_print       __TK("kprt",  "%9", 176, _ky_print )
+#define Key_redo        __TK("krdo",  "%0", 177, _ky_redo )
+#define Key_reference   __TK("kref",  "&1", 178, _ky_reference )
+#define Key_refresh     __TK("krfr",  "&2", 179, _ky_refresh )
+#define Key_replace     __TK("krpl",  "&3", 180, _ky_replace )
+#define Key_restart     __TK("krst",  "&4", 181, _ky_restart )
+#define Key_resume      __TK("kres",  "&5", 182, _ky_resume )
+#define Key_save        __TK("ksav",  "&6", 183, _ky_save )
+#define Key_suspend     __TK("kspd",  "&7", 184, _ky_suspend )
+#define Key_undo        __TK("kund",  "&8", 185, _ky_undo )
+#define Key_sbeg        __TK("kBEG",  "&9", 186, _ky_sbeg )
+#define Key_scancel     __TK("kCAN",  "&0", 187, _ky_scancel )
+#define Key_scommand    __TK("kCMD",  "*1", 188, _ky_scommand )
+#define Key_scopy       __TK("kCPY",  "*2", 189, _ky_scopy )
+#define Key_screate     __TK("kCRT",  "*3", 190, _ky_screate )
+#define Key_sdc         __TK("kDC",   "*4", 191, _ky_sdc )
+#define Key_sdl         __TK("kDL",   "*5", 192, _ky_sdl )
+#define Key_select      __TK("kslt",  "*6", 193, _ky_select )
+#define Key_send        __TK("kEND",  "*7", 194, _ky_send )
+#define Key_seol        __TK("kEOL",  "*8", 195, _ky_seol )
+#define Key_sexit       __TK("kEXT",  "*9", 196, _ky_sexit )
+#define Key_sfind       __TK("kFND",  "*0", 197, _ky_sfind )
+#define Key_shelp       __TK("kHLP",  "#1", 198, _ky_shelp )
+#define Key_shome       __TK("kHOM",  "#2", 199, _ky_shome )
+#define Key_sic         __TK("kIC",   "#3", 200, _ky_sic )
+#define Key_sleft       __TK("kLFT",  "#4", 201, _ky_sleft )
+#define Key_smessage    __TK("kMSG",  "%a", 202, _ky_smessage )
+#define Key_smove       __TK("kMOV",  "%b", 203, _ky_smove )
+#define Key_snext       __TK("kNXT",  "%c", 204, _ky_snext )
+#define Key_soptions    __TK("kOPT",  "%d", 205, _ky_soptions )
+#define Key_sprevious   __TK("kPRV",  "%e", 206, _ky_sprevious )
+#define Key_sprint      __TK("kPRT",  "%f", 207, _ky_sprint )
+#define Key_sredo       __TK("kRDO",  "%g", 208, _ky_sredo )
+#define Key_sreplace    __TK("kRPL",  "%h", 209, _ky_sreplace )
+#define Key_sright      __TK("kRIT",  "%i", 210, _ky_sright )
+#define Key_srsume      __TK("kRES",  "%j", 211, _ky_srsume )
+#define Key_ssave       __TK("kSAV",  "!1", 212, _ky_ssave )
+#define Key_ssuspend    __TK("kSPD",  "!2", 213, _ky_ssuspend )
+#define Key_sundo       __TK("kUND",  "!3", 214, _ky_sundo )
+#define Key_f11         __TK("kf11",  "F1", 216, _ky_f11 )
+#define Key_f12         __TK("kf12",  "F2", 217, _ky_f12 )
+#define Key_f13         __TK("kf13",  "F3", 218, _ky_f13 )
+#define Key_f14         __TK("kf14",  "F4", 219, _ky_f14 )
+#define Key_f15         __TK("kf15",  "F5", 220, _ky_f15 )
+#define Key_f16         __TK("kf16",  "F6", 221, _ky_f16 )
+#define Key_f17         __TK("kf17",  "F7", 222, _ky_f17 )
+#define Key_f18         __TK("kf18",  "F8", 223, _ky_f18 )
+#define Key_f19         __TK("kf19",  "F9", 224, _ky_f19 )
+#define Key_f20         __TK("kf20",  "FA", 225, _ky_f20 )
+#define Key_f21         __TK("kf21",  "FB", 226, _ky_f21 )
+#define Key_f22         __TK("kf22",  "FC", 227, _ky_f22 )
+#define Key_f23         __TK("kf23",  "FD", 228, _ky_f23 )
+#define Key_f24         __TK("kf24",  "FE", 229, _ky_f24 )
+#define Key_f25         __TK("kf25",  "FF", 230, _ky_f25 )
+#define Key_f26         __TK("kf26",  "FG", 231, _ky_f26 )
+#define Key_f27         __TK("kf27",  "FH", 232, _ky_f27 )
+#define Key_f28         __TK("kf28",  "FI", 233, _ky_f28 )
+#define Key_f29         __TK("kf29",  "FJ", 234, _ky_f29 )
+#define Key_f30         __TK("kf30",  "FK", 235, _ky_f30 )
+#define Key_f31         __TK("kf31",  "FL", 236, _ky_f31 )
+#define Key_f32         __TK("kf32",  "FM", 237, _ky_f32 )
+#define Key_f33         __TK("kf33",  "FN", 238, _ky_f33 )
+#define Key_f34         __TK("kf34",  "FO", 239, _ky_f34 )
+#define Key_f35         __TK("kf35",  "FP", 240, _ky_f35 )
+#define Key_f36         __TK("kf36",  "FQ", 241, _ky_f36 )
+#define Key_f37         __TK("kf37",  "FR", 242, _ky_f37 )
+#define Key_f38         __TK("kf38",  "FS", 243, _ky_f38 )
+#define Key_f39         __TK("kf39",  "FT", 244, _ky_f39 )
+#define Key_f40         __TK("kf40",  "FU", 245, _ky_f40 )
+#define Key_f41         __TK("kf41",  "FV", 246, _ky_f41 )
+#define Key_f42         __TK("kf42",  "FW", 247, _ky_f42 )
+#define Key_f43         __TK("kf43",  "FX", 248, _ky_f43 )
+#define Key_f44         __TK("kf44",  "FY", 249, _ky_f44 )
+#define Key_f45         __TK("kf45",  "FZ", 250, _ky_f45 )
+#define Key_f46         __TK("kf46",  "Fa", 251, _ky_f46 )
+#define Key_f47         __TK("kf47",  "Fb", 252, _ky_f47 )
+#define Key_f48         __TK("kf48",  "Fc", 253, _ky_f48 )
+#define Key_f49         __TK("kf49",  "Fd", 254, _ky_f49 )
+#define Key_f50         __TK("kf50",  "Fe", 255, _ky_f50 )
+#define Key_f51         __TK("kf51",  "Ff", 256, _ky_f51 )
+#define Key_f52         __TK("kf52",  "Fg", 257, _ky_f52 )
+#define Key_f53         __TK("kf53",  "Fh", 258, _ky_f53 )
+#define Key_f54         __TK("kf54",  "Fi", 259, _ky_f54 )
+#define Key_f55         __TK("kf55",  "Fj", 260, _ky_f55 )
+#define Key_f56         __TK("kf56",  "Fk", 261, _ky_f56 )
+#define Key_f57         __TK("kf57",  "Fl", 262, _ky_f57 )
+#define Key_f58         __TK("kf58",  "Fm", 263, _ky_f58 )
+#define Key_f59         __TK("kf59",  "Fn", 264, _ky_f59 )
+#define Key_f60         __TK("kf60",  "Fo", 265, _ky_f60 )
+#define Key_f61         __TK("kf61",  "Fp", 266, _ky_f61 )
+#define Key_f62         __TK("kf62",  "Fq", 267, _ky_f62 )
+#define Key_f63         __TK("kf63",  "Fr", 268, _ky_f63 )
+
+/* }}} */
+
+#ifdef HAVE_QNX_KEYS
+
+/* don't force pre-defining of base keys under QNX */
+#define FORCE_BASE_KEY_DEFS 0
+
+/* OS specific key aliases */
+#define Key_alt_a       Key_clear
+#define Key_alt_b       Key_stab
+#define Key_alt_c       Key_close
+#define Key_alt_d       Key_catab
+#define Key_alt_e       Key_message
+#define Key_alt_f       Key_find
+#define Key_alt_g       Key_refresh
+#define Key_alt_h       Key_help
+#define Key_alt_i       Key_move
+#define Key_alt_j       Key_restart
+#define Key_alt_k       Key_options
+#define Key_alt_l       Key_reference
+#define Key_alt_m       Key_mark
+#define Key_alt_n       Key_sbeg
+#define Key_alt_o       Key_open
+#define Key_alt_p       Key_resume
+#define Key_alt_q       Key_save
+#define Key_alt_r       Key_replace
+#define Key_alt_s       Key_scopy
+#define Key_alt_t       Key_screate
+#define Key_alt_u       Key_undo
+#define Key_alt_v       Key_sdl
+#define Key_alt_w       Key_sexit
+#define Key_alt_x       Key_sfind
+#define Key_alt_y       Key_shelp
+#define Key_alt_z       Key_soptions
+
+#define Key_ctl_enter   Key_enter
+#define Key_ctl_tab     Key_ctab
+
+#define Key_alt_tab     Key_ctl_tab     /* map ALT-TAB to CTRL-TAB */
+#define Key_alt_enter   Key_ctl_enter   /* map ALT-ENTER to CTRL-ENTER */
+
+#ifdef __USE_QNX_TI
+/* define current xtra_key_define_t (enable OS/implementation) */
+#define xtra_key_define_t qnx_key_define_t
+#endif /* __USE_QNX_TI */
+#endif /* HAVE_QNX_KEYS */
+
+
+#ifdef xtra_key_define_t
+#ifndef FORCE_BASE_KEY_DEFS
+#define FORCE_BASE_KEY_DEFS 0
+#endif
+#endif /* xtra_key_define_t */
+
+#ifdef HAVE_QNX_KEYS
+#ifdef __USE_QNX_TI
+#define __CT               (__cur_term)
+#define __QTISOFFS(_qtisx) (((charoffset*)(&__CT->_strs))[_qtisx])
+#define __QTISSTR(_qtisx)  (&__CT->_strtab[0]+__QTISOFFS(_qtisx))
+#endif /* __USE_QNX_TI */
+#endif /* HAVE_QNX_KEYS */
+
+/*** file scope type declarations ****************************************************************/
+
+#ifdef HAVE_QNX_KEYS
+#ifdef __USE_QNX_TI
+/* OS/implementation specific key-define struct */
+typedef const struct qnx_key_define_s
+{
+    int mc_code;
+    int str_idx;
+} qnx_key_define_t;
+#endif /* __USE_QNX_TI */
+#endif /* HAVE_QNX_KEYS */
+
+/*** file scope variables ************************************************************************/
+
+
+#ifdef xtra_key_define_t
+
+/* general key define table */
+xtra_key_define_t xtra_key_defines[] = {
+#if FORCE_BASE_KEY_DEFS
+    {KEY_BACKSPACE, Key_backspace},
+    {KEY_LEFT, Key_left},
+    {KEY_RIGHT, Key_right},
+    {KEY_UP, Key_up},
+    {KEY_DOWN, Key_down},
+    {KEY_NPAGE, Key_npage},
+    {KEY_PPAGE, Key_ppage},
+    {KEY_HOME, Key_home},
+    {KEY_END, Key_end},
+    {KEY_DC, Key_dc},
+    {KEY_IC, Key_ic},
+    {KEY_F (1), Key_f1},
+    {KEY_F (2), Key_f2},
+    {KEY_F (3), Key_f3},
+    {KEY_F (4), Key_f4},
+    {KEY_F (5), Key_f5},
+    {KEY_F (6), Key_f6},
+    {KEY_F (7), Key_f7},
+    {KEY_F (8), Key_f8},
+    {KEY_F (9), Key_f9},
+    {KEY_F (10), Key_f10},
+    {KEY_F (11), Key_f11},
+    {KEY_F (12), Key_f12},
+    {KEY_F (13), Key_f13},
+    {KEY_F (14), Key_f14},
+    {KEY_F (15), Key_f15},
+    {KEY_F (16), Key_f16},
+    {KEY_F (17), Key_f17},
+    {KEY_F (18), Key_f18},
+    {KEY_F (19), Key_f19},
+    {KEY_F (20), Key_f20},
+#endif
+    {ALT ('a'), Key_alt_a},
+    {ALT ('b'), Key_alt_b},
+    {ALT ('c'), Key_alt_c},
+    {ALT ('d'), Key_alt_d},
+    {ALT ('e'), Key_alt_e},
+    {ALT ('f'), Key_alt_f},
+    {ALT ('g'), Key_alt_g},
+    {ALT ('h'), Key_alt_h},
+    {ALT ('i'), Key_alt_i},
+    {ALT ('j'), Key_alt_j},
+    {ALT ('k'), Key_alt_k},
+    {ALT ('l'), Key_alt_l},
+    {ALT ('m'), Key_alt_m},
+    {ALT ('n'), Key_alt_n},
+    {ALT ('o'), Key_alt_o},
+    {ALT ('p'), Key_alt_p},
+    {ALT ('q'), Key_alt_q},
+    {ALT ('r'), Key_alt_r},
+    {ALT ('s'), Key_alt_s},
+    {ALT ('t'), Key_alt_t},
+    {ALT ('u'), Key_alt_u},
+    {ALT ('v'), Key_alt_v},
+    {ALT ('w'), Key_alt_w},
+    {ALT ('x'), Key_alt_x},
+    {ALT ('y'), Key_alt_y},
+    {ALT ('z'), Key_alt_z},
+
+    {ALT ('\n'), Key_alt_enter},
+    {ALT ('\t'), Key_alt_tab}
+};
+
+#endif /* xtra_key_define_t */
+
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+#ifdef HAVE_QNX_KEYS
+#ifdef __USE_QNX_TI
+void
+load_qnx_key_defines (void)
+{
+    static int _qnx_keys_defined = 0;
+
+    if (!_qnx_keys_defined)
+    {
+        int idx;
+        int term_setup_ok;
+
+        __setupterm (NULL, fileno (stdout), &term_setup_ok);
+        if (term_setup_ok != 1)
+            return;
+
+        for (idx = 0; idx < sizeof (xtra_key_defines) / sizeof (xtra_key_defines[0]); idx++)
+        {
+            int str_idx = xtra_key_defines[idx].str_idx;
+
+            if (__QTISOFFS (str_idx))
+            {
+                if (*__QTISSTR (str_idx))
+                {
+                    define_sequence (xtra_key_defines[idx].mc_code,
+                                     __QTISSTR (str_idx), MCKEY_NOACTION);
+                }
+            }
+        }
+        _qnx_keys_defined = 1;
+    }
+}
+#endif /* __USE_QNX_TI */
+#endif /* HAVE_QNX_KEYS */
+
+/* --------------------------------------------------------------------------------------------- */
+/* called from key.c/init_key() */
+
+void
+load_xtra_key_defines (void)
+{
+#ifdef HAVE_QNX_KEYS
+    load_qnx_key_defines ();
+#endif
+}
+
+/* --------------------------------------------------------------------------------------------- */
diff --git a/lib/tty/mouse.c b/lib/tty/mouse.c
new file mode 100644
index 0000000..640a39f
--- /dev/null
+++ b/lib/tty/mouse.c
@@ -0,0 +1,216 @@
+/*
+   Mouse managing
+
+   Copyright (C) 1994-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Andrew Borodin <aborodin@vmail.ru>, 2009.
+
+   This file is part of the Midnight Commander.
+
+   The Midnight Commander is free software: you can redistribute it
+   and/or modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   The Midnight Commander 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file mouse.c
+ *  \brief Source: mouse managing
+ *
+ *  Events received by clients of this library have their coordinates 0 based
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "lib/global.h"
+
+#include "tty.h"
+#include "tty-internal.h"       /* mouse_enabled */
+#include "mouse.h"
+#include "key.h"                /* define sequence */
+
+/*** global variables ****************************************************************************/
+
+Mouse_Type use_mouse_p = MOUSE_NONE;
+gboolean mouse_enabled = FALSE;
+int mouse_fd = -1;              /* for when gpm_fd changes to < 0 and the old one must be cleared from select_set */
+const char *xmouse_seq;
+const char *xmouse_extended_seq;
+
+/*** file scope macro definitions ****************************************************************/
+
+/*** file scope type declarations ****************************************************************/
+
+/*** file scope variables ************************************************************************/
+
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+void
+show_mouse_pointer (int x, int y)
+{
+#ifdef HAVE_LIBGPM
+    if (use_mouse_p == MOUSE_GPM)
+        Gpm_DrawPointer (x, y, gpm_consolefd);
+#else
+    (void) x;
+    (void) y;
+#endif /* HAVE_LIBGPM */
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+init_mouse (void)
+{
+    switch (use_mouse_p)
+    {
+#ifdef HAVE_LIBGPM
+    case MOUSE_NONE:
+        use_mouse_p = MOUSE_GPM;
+        break;
+#endif /* HAVE_LIBGPM */
+
+    case MOUSE_XTERM_NORMAL_TRACKING:
+    case MOUSE_XTERM_BUTTON_EVENT_TRACKING:
+        if (xmouse_seq != NULL)
+            define_sequence (MCKEY_MOUSE, xmouse_seq, MCKEY_NOACTION);
+        if (xmouse_extended_seq != NULL)
+            define_sequence (MCKEY_EXTENDED_MOUSE, xmouse_extended_seq, MCKEY_NOACTION);
+        break;
+
+    default:
+        break;
+    }
+
+    enable_mouse ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+enable_mouse (void)
+{
+    if (mouse_enabled)
+        return;
+
+    switch (use_mouse_p)
+    {
+#ifdef HAVE_LIBGPM
+    case MOUSE_GPM:
+        {
+            Gpm_Connect conn;
+
+            conn.eventMask = ~GPM_MOVE;
+            conn.defaultMask = GPM_MOVE;
+            conn.minMod = 0;
+            conn.maxMod = 0;
+
+            mouse_fd = Gpm_Open (&conn, 0);
+            if (mouse_fd == -1)
+            {
+                use_mouse_p = MOUSE_NONE;
+                return;
+            }
+            mouse_enabled = TRUE;
+        }
+        break;
+#endif /* HAVE_LIBGPM */
+
+    case MOUSE_XTERM_NORMAL_TRACKING:
+        /* save old highlight mouse tracking */
+        printf (ESC_STR "[?1001s");
+
+        /* enable mouse tracking */
+        printf (ESC_STR "[?1000h");
+
+        /* enable SGR extended mouse reporting */
+        printf (ESC_STR "[?1006h");
+
+        fflush (stdout);
+        mouse_enabled = TRUE;
+        break;
+
+    case MOUSE_XTERM_BUTTON_EVENT_TRACKING:
+        /* save old highlight mouse tracking */
+        printf (ESC_STR "[?1001s");
+
+        /* enable mouse tracking */
+        printf (ESC_STR "[?1002h");
+
+        /* enable SGR extended mouse reporting */
+        printf (ESC_STR "[?1006h");
+
+        fflush (stdout);
+        mouse_enabled = TRUE;
+        break;
+
+    default:
+        break;
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+disable_mouse (void)
+{
+    if (!mouse_enabled)
+        return;
+
+    mouse_enabled = FALSE;
+
+    switch (use_mouse_p)
+    {
+#ifdef HAVE_LIBGPM
+    case MOUSE_GPM:
+        Gpm_Close ();
+        break;
+#endif
+    case MOUSE_XTERM_NORMAL_TRACKING:
+        /* disable SGR extended mouse reporting */
+        printf (ESC_STR "[?1006l");
+
+        /* disable mouse tracking */
+        printf (ESC_STR "[?1000l");
+
+        /* restore old highlight mouse tracking */
+        printf (ESC_STR "[?1001r");
+
+        fflush (stdout);
+        break;
+    case MOUSE_XTERM_BUTTON_EVENT_TRACKING:
+        /* disable SGR extended mouse reporting */
+        printf (ESC_STR "[?1006l");
+
+        /* disable mouse tracking */
+        printf (ESC_STR "[?1002l");
+
+        /* restore old highlight mouse tracking */
+        printf (ESC_STR "[?1001r");
+
+        fflush (stdout);
+        break;
+    default:
+        break;
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
diff --git a/lib/tty/mouse.h b/lib/tty/mouse.h
new file mode 100644
index 0000000..99d0a69
--- /dev/null
+++ b/lib/tty/mouse.h
@@ -0,0 +1,117 @@
+
+/** \file mouse.h
+ *  \brief Header: mouse managing
+ *
+ *  Events received by clients of this library have their coordinates 0 based
+ */
+
+#ifndef MC__MOUSE_H
+#define MC__MOUSE_H
+
+#ifdef HAVE_LIBGPM
+/* GPM mouse support include file */
+#include <gpm.h>
+#endif /* !HAVE_LIBGPM */
+
+
+/*** typedefs(not structures) and defined constants **********************************************/
+
+#ifndef HAVE_LIBGPM
+/* Equivalent definitions for non-GPM mouse support */
+/* These lines are modified version from the lines appearing in the */
+/* gpm.h include file of the Linux General Purpose Mouse server */
+
+#define GPM_B_LEFT      (1 << 2)
+#define GPM_B_MIDDLE    (1 << 1)
+#define GPM_B_RIGHT     (1 << 0)
+
+#define GPM_BARE_EVENTS(ev) ((ev)&0xF)
+#endif /* !HAVE_LIBGPM */
+
+/* Mouse wheel events */
+#ifndef GPM_B_DOWN
+#define GPM_B_DOWN      (1 << 5)
+#endif
+
+#ifndef GPM_B_UP
+#define GPM_B_UP        (1 << 4)
+#endif
+
+/*** enums ***************************************************************************************/
+
+#ifndef HAVE_LIBGPM
+/* Xterm mouse support supports only GPM_DOWN and GPM_UP */
+/* If you use others make sure your code also works without them */
+enum Gpm_Etype
+{
+    GPM_MOVE = 1,
+    GPM_DRAG = 2,               /* exactly one in four is active at a time */
+    GPM_DOWN = 4,
+    GPM_UP = 8,
+
+
+    GPM_SINGLE = 16,            /* at most one in three is set */
+    GPM_DOUBLE = 32,
+    GPM_TRIPLE = 64,
+
+    GPM_MFLAG = 128,            /* motion during click? */
+    GPM_HARD = 256              /* if set in the defaultMask, force an already
+                                   used event to pass over to another handler */
+};
+#endif /* !HAVE_LIBGPM */
+
+/* Constants returned from the mouse callback */
+enum
+{
+    MOU_UNHANDLED = 0,
+    MOU_NORMAL,
+    MOU_REPEAT
+};
+
+/* Type of mouse support */
+typedef enum
+{
+    MOUSE_NONE,                 /* Not detected yet */
+    MOUSE_DISABLED,             /* Explicitly disabled by -d */
+    MOUSE_GPM,                  /* Support using GPM on Linux */
+    MOUSE_XTERM,                /* Support using xterm-style mouse reporting */
+    MOUSE_XTERM_NORMAL_TRACKING = MOUSE_XTERM,
+    MOUSE_XTERM_BUTTON_EVENT_TRACKING
+} Mouse_Type;
+
+/*** structures declarations (and typedefs of structures)*****************************************/
+
+#ifndef HAVE_LIBGPM
+typedef struct Gpm_Event
+{
+    int buttons, x, y;
+    enum Gpm_Etype type;
+} Gpm_Event;
+#endif /* !HAVE_LIBGPM */
+
+/*** global variables defined in .c file *********************************************************/
+
+/* Type of the currently used mouse */
+extern Mouse_Type use_mouse_p;
+
+/* To be used when gpm_fd were initially >= 0 */
+extern int mouse_fd;
+
+/* String indicating that a mouse event has occurred, usually "\E[M" */
+extern const char *xmouse_seq;
+
+/* String indicating that an SGR extended mouse event has occurred, namely "\E[<" */
+extern const char *xmouse_extended_seq;
+
+/*** declarations of public functions ************************************************************/
+
+/* General (i.e. both for xterm and gpm) mouse support definitions */
+
+void init_mouse (void);
+void enable_mouse (void);
+void disable_mouse (void);
+
+void show_mouse_pointer (int x, int y);
+
+/*** inline functions ****************************************************************************/
+#endif /* MC_MOUSE_H */
diff --git a/lib/tty/tty-internal.c b/lib/tty/tty-internal.c
new file mode 100644
index 0000000..1e42e0f
--- /dev/null
+++ b/lib/tty/tty-internal.c
@@ -0,0 +1,110 @@
+/*
+   Internal stuff of the terminal controlling library.
+
+   Copyright (C) 2019-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Andrew Borodin <aborodin@vmail.ru>, 2019.
+
+   This file is part of the Midnight Commander.
+
+   The Midnight Commander is free software: you can redistribute it
+   and/or modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   The Midnight Commander 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file
+ *  \brief Source: internal stuff of the terminal controlling library.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include "lib/global.h"
+
+#include <glib-unix.h>
+
+#include "tty-internal.h"
+
+/*** global variables ****************************************************************************/
+
+/* pipe to handle SIGWINCH */
+int sigwinch_pipe[2];
+
+/*** file scope macro definitions ****************************************************************/
+
+/*** global variables ****************************************************************************/
+
+/*** file scope type declarations ****************************************************************/
+
+/*** file scope variables ************************************************************************/
+
+/* --------------------------------------------------------------------------------------------- */
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_create_winch_pipe (void)
+{
+    GError *mcerror = NULL;
+
+    if (!g_unix_open_pipe (sigwinch_pipe, FD_CLOEXEC, &mcerror))
+    {
+        fprintf (stderr, _("\nCannot create pipe for SIGWINCH: %s (%d)\n"),
+                 mcerror->message, mcerror->code);
+        g_error_free (mcerror);
+        exit (EXIT_FAILURE);
+    }
+
+    /* If we read from an empty pipe, then read(2) will block until data is available.
+     * If we write to a full pipe, then write(2) blocks until sufficient data has been read
+     * from the pipe to allow the write to complete..
+     * Therefore, use nonblocking I/O.
+     */
+    if (!g_unix_set_fd_nonblocking (sigwinch_pipe[0], TRUE, &mcerror))
+    {
+        fprintf (stderr, _("\nCannot configure write end of SIGWINCH pipe: %s (%d)\n"),
+                 mcerror->message, mcerror->code);
+        g_error_free (mcerror);
+        tty_destroy_winch_pipe ();
+        exit (EXIT_FAILURE);
+    }
+
+    if (!g_unix_set_fd_nonblocking (sigwinch_pipe[1], TRUE, &mcerror))
+    {
+        fprintf (stderr, _("\nCannot configure read end of SIGWINCH pipe: %s (%d)\n"),
+                 mcerror->message, mcerror->code);
+        g_error_free (mcerror);
+        tty_destroy_winch_pipe ();
+        exit (EXIT_FAILURE);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_destroy_winch_pipe (void)
+{
+    (void) close (sigwinch_pipe[0]);
+    (void) close (sigwinch_pipe[1]);
+}
+
+/* --------------------------------------------------------------------------------------------- */
diff --git a/lib/tty/tty-internal.h b/lib/tty/tty-internal.h
new file mode 100644
index 0000000..a2cdfa7
--- /dev/null
+++ b/lib/tty/tty-internal.h
@@ -0,0 +1,49 @@
+
+/** \file tty-internal.h
+ *  \brief Header: internal stuff of the terminal controlling library
+ */
+
+#ifndef MC__TTY_INTERNAL_H
+#define MC__TTY_INTERNAL_H
+
+#include "lib/global.h"         /* include <glib.h> */
+
+/*** typedefs(not structures) and defined constants **********************************************/
+
+/* Taken from S-Lang's slutty.c */
+#ifdef _POSIX_VDISABLE
+#define NULL_VALUE _POSIX_VDISABLE
+#else
+#define NULL_VALUE 255
+#endif
+
+/*** enums ***************************************************************************************/
+
+/*** structures declarations (and typedefs of structures)*****************************************/
+
+/*** global variables defined in .c file *********************************************************/
+
+/* The mouse is currently: TRUE - enabled, FALSE - disabled */
+extern gboolean mouse_enabled;
+
+/* terminal ca capabilities */
+extern char *smcup;
+extern char *rmcup;
+
+/* pipe to handle SIGWINCH */
+extern int sigwinch_pipe[2];
+
+/*** declarations of public functions ************************************************************/
+
+void tty_create_winch_pipe (void);
+void tty_destroy_winch_pipe (void);
+
+char *mc_tty_normalize_from_utf8 (const char *str);
+void tty_init_xterm_support (gboolean is_xterm);
+int tty_lowlevel_getch (void);
+
+void tty_colorize_area (int y, int x, int rows, int cols, int color);
+
+/*** inline functions ****************************************************************************/
+
+#endif /* MC_TTY_INTERNAL_H */
diff --git a/lib/tty/tty-ncurses.c b/lib/tty/tty-ncurses.c
new file mode 100644
index 0000000..f100ffa
--- /dev/null
+++ b/lib/tty/tty-ncurses.c
@@ -0,0 +1,771 @@
+/*
+   Interface to the terminal controlling library.
+   Ncurses wrapper.
+
+   Copyright (C) 2005-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Andrew Borodin <aborodin@vmail.ru>, 2009.
+   Ilia Maslakov <il.smind@gmail.com>, 2009.
+
+   This file is part of the Midnight Commander.
+
+   The Midnight Commander is free software: you can redistribute it
+   and/or modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   The Midnight Commander 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file
+ *  \brief Source: NCurses-based tty layer of Midnight-commander
+ */
+
+#include <config.h>
+
+#include <stdlib.h>
+#include <stdarg.h>
+#include <signal.h>
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+#include <termios.h>
+
+#include "lib/global.h"
+#include "lib/strutil.h"        /* str_term_form */
+
+#ifndef WANT_TERM_H
+#define WANT_TERM_H
+#endif
+
+#include "tty-internal.h"       /* mc_tty_normalize_from_utf8() */
+#include "tty.h"
+#include "color.h"              /* tty_setcolor */
+#include "color-internal.h"
+#include "key.h"
+#include "mouse.h"
+#include "win.h"
+
+/* include at last !!! */
+#ifdef WANT_TERM_H
+#ifdef HAVE_NCURSES_TERM_H
+#include <ncurses/term.h>
+#else
+#include <term.h>
+#endif /* HAVE_NCURSES_TERM_H */
+#endif /* WANT_TERM_H */
+
+/*** global variables ****************************************************************************/
+
+/*** file scope macro definitions ****************************************************************/
+
+#if !defined(CTRL)
+#define CTRL(x) ((x) & 0x1f)
+#endif
+
+#define yx_in_screen(y, x) \
+    (y >= 0 && y < LINES && x >= 0 && x < COLS)
+
+/*** global variables ****************************************************************************/
+
+/*** file scope type declarations ****************************************************************/
+
+/*** file scope variables ************************************************************************/
+
+/* ncurses supports cursor positions only within window */
+/* We use our own cursor coordinates to support partially visible widgets */
+static int mc_curs_row, mc_curs_col;
+
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+tty_setup_sigwinch (void (*handler) (int))
+{
+#if (NCURSES_VERSION_MAJOR >= 4) && defined (SIGWINCH)
+    struct sigaction act, oact;
+
+    memset (&act, 0, sizeof (act));
+    act.sa_handler = handler;
+    sigemptyset (&act.sa_mask);
+#ifdef SA_RESTART
+    act.sa_flags = SA_RESTART;
+#endif /* SA_RESTART */
+    sigaction (SIGWINCH, &act, &oact);
+#endif /* SIGWINCH */
+
+    tty_create_winch_pipe ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+sigwinch_handler (int dummy)
+{
+    ssize_t n = 0;
+
+    (void) dummy;
+
+    n = write (sigwinch_pipe[1], "", 1);
+    (void) n;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+/**
+ * Get visible part of area.
+ *
+ * @returns TRUE if any part of area is in screen bounds, FALSE otherwise.
+ */
+static gboolean
+tty_clip (int *y, int *x, int *rows, int *cols)
+{
+    if (*y < 0)
+    {
+        *rows += *y;
+
+        if (*rows <= 0)
+            return FALSE;
+
+        *y = 0;
+    }
+
+    if (*x < 0)
+    {
+        *cols += *x;
+
+        if (*cols <= 0)
+            return FALSE;
+
+        *x = 0;
+    }
+
+    if (*y + *rows > LINES)
+        *rows = LINES - *y;
+
+    if (*rows <= 0)
+        return FALSE;
+
+    if (*x + *cols > COLS)
+        *cols = COLS - *x;
+
+    if (*cols <= 0)
+        return FALSE;
+
+    return TRUE;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+int
+mc_tty_normalize_lines_char (const char *ch)
+{
+    char *str2;
+    int res;
+
+    struct mc_tty_lines_struct
+    {
+        const char *line;
+        int line_code;
+    } const lines_codes[] = {
+        {"\342\224\230", ACS_LRCORNER}, /* ┌ */
+        {"\342\224\224", ACS_LLCORNER}, /* └ */
+        {"\342\224\220", ACS_URCORNER}, /* ┐ */
+        {"\342\224\214", ACS_ULCORNER}, /* ┘ */
+        {"\342\224\234", ACS_LTEE},     /* ├ */
+        {"\342\224\244", ACS_RTEE},     /* ┤ */
+        {"\342\224\254", ACS_TTEE},     /* ┬ */
+        {"\342\224\264", ACS_BTEE},     /* ┴ */
+        {"\342\224\200", ACS_HLINE},    /* ─ */
+        {"\342\224\202", ACS_VLINE},    /* │ */
+        {"\342\224\274", ACS_PLUS},     /* ┼ */
+
+        {"\342\225\235", ACS_LRCORNER | A_BOLD},        /* ╔ */
+        {"\342\225\232", ACS_LLCORNER | A_BOLD},        /* ╚ */
+        {"\342\225\227", ACS_URCORNER | A_BOLD},        /* ╗ */
+        {"\342\225\224", ACS_ULCORNER | A_BOLD},        /* ╝ */
+        {"\342\225\237", ACS_LTEE | A_BOLD},    /* ╟ */
+        {"\342\225\242", ACS_RTEE | A_BOLD},    /* ╢ */
+        {"\342\225\244", ACS_TTEE | A_BOLD},    /* ╤ */
+        {"\342\225\247", ACS_BTEE | A_BOLD},    /* ╧ */
+        {"\342\225\220", ACS_HLINE | A_BOLD},   /* ═ */
+        {"\342\225\221", ACS_VLINE | A_BOLD},   /* ║ */
+
+        {NULL, 0}
+    };
+
+    if (ch == NULL)
+        return (int) ' ';
+
+    for (res = 0; lines_codes[res].line; res++)
+    {
+        if (strcmp (ch, lines_codes[res].line) == 0)
+            return lines_codes[res].line_code;
+    }
+
+    str2 = mc_tty_normalize_from_utf8 (ch);
+    res = g_utf8_get_char_validated (str2, -1);
+
+    if (res < 0)
+        res = (unsigned char) str2[0];
+    g_free (str2);
+
+    return res;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_init (gboolean mouse_enable, gboolean is_xterm)
+{
+    struct termios mode;
+
+    initscr ();
+
+#ifdef HAVE_ESCDELAY
+    /*
+     * If ncurses exports the ESCDELAY variable, it should be set to
+     * a low value, or you'll experience a delay in processing escape
+     * sequences that are recognized by mc (e.g. Esc-Esc).  On the other
+     * hand, making ESCDELAY too small can result in some sequences
+     * (e.g. cursor arrows) being reported as separate keys under heavy
+     * processor load, and this can be a problem if mc hasn't learned
+     * them in the "Learn Keys" dialog.  The value is in milliseconds.
+     */
+    ESCDELAY = 200;
+#endif /* HAVE_ESCDELAY */
+
+    tcgetattr (STDIN_FILENO, &mode);
+    /* use Ctrl-g to generate SIGINT */
+    mode.c_cc[VINTR] = CTRL ('g');      /* ^g */
+    /* disable SIGQUIT to allow use Ctrl-\ key */
+    mode.c_cc[VQUIT] = NULL_VALUE;
+    tcsetattr (STDIN_FILENO, TCSANOW, &mode);
+
+    /* curses remembers the "in-program" modes after this call */
+    def_prog_mode ();
+
+    tty_start_interrupt_key ();
+
+    if (!mouse_enable)
+        use_mouse_p = MOUSE_DISABLED;
+    tty_init_xterm_support (is_xterm);  /* do it before tty_enter_ca_mode() call */
+    tty_enter_ca_mode ();
+    tty_raw_mode ();
+    noecho ();
+    keypad (stdscr, TRUE);
+    nodelay (stdscr, FALSE);
+
+    tty_setup_sigwinch (sigwinch_handler);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_shutdown (void)
+{
+    tty_destroy_winch_pipe ();
+    tty_reset_shell_mode ();
+    tty_noraw_mode ();
+    tty_keypad (FALSE);
+    tty_reset_screen ();
+    tty_exit_ca_mode ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_enter_ca_mode (void)
+{
+    if (mc_global.tty.xterm_flag && smcup != NULL)
+    {
+        fprintf (stdout, /* ESC_STR ")0" */ ESC_STR "7" ESC_STR "[?47h");
+        fflush (stdout);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_exit_ca_mode (void)
+{
+    if (mc_global.tty.xterm_flag && rmcup != NULL)
+    {
+        fprintf (stdout, ESC_STR "[?47l" ESC_STR "8" ESC_STR "[m");
+        fflush (stdout);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_change_screen_size (void)
+{
+#if defined(TIOCGWINSZ) && NCURSES_VERSION_MAJOR >= 4
+    struct winsize winsz;
+
+    winsz.ws_col = winsz.ws_row = 0;
+
+#ifndef NCURSES_VERSION
+    tty_noraw_mode ();
+    tty_reset_screen ();
+#endif
+
+    /* Ioctl on the STDIN_FILENO */
+    ioctl (fileno (stdout), TIOCGWINSZ, &winsz);
+    if (winsz.ws_col != 0 && winsz.ws_row != 0)
+    {
+#if defined(NCURSES_VERSION) && defined(HAVE_RESIZETERM)
+        resizeterm (winsz.ws_row, winsz.ws_col);
+        clearok (stdscr, TRUE); /* sigwinch's should use a semaphore! */
+#else
+        COLS = winsz.ws_col;
+        LINES = winsz.ws_row;
+#endif
+    }
+#endif /* defined(TIOCGWINSZ) || NCURSES_VERSION_MAJOR >= 4 */
+
+#ifdef ENABLE_SUBSHELL
+    if (mc_global.tty.use_subshell)
+        tty_resize (mc_global.tty.subshell_pty);
+#endif
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_reset_prog_mode (void)
+{
+    reset_prog_mode ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_reset_shell_mode (void)
+{
+    reset_shell_mode ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_raw_mode (void)
+{
+    raw ();                     /* FIXME: uneeded? */
+    cbreak ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_noraw_mode (void)
+{
+    nocbreak ();                /* FIXME: unneeded? */
+    noraw ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_noecho (void)
+{
+    noecho ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+int
+tty_flush_input (void)
+{
+    return flushinp ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_keypad (gboolean set)
+{
+    keypad (stdscr, (bool) set);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_nodelay (gboolean set)
+{
+    nodelay (stdscr, (bool) set);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+int
+tty_baudrate (void)
+{
+    return baudrate ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+int
+tty_lowlevel_getch (void)
+{
+    return getch ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+int
+tty_reset_screen (void)
+{
+    return endwin ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_touch_screen (void)
+{
+    touchwin (stdscr);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_gotoyx (int y, int x)
+{
+    mc_curs_row = y;
+    mc_curs_col = x;
+
+    if (y < 0)
+        y = 0;
+    if (y >= LINES)
+        y = LINES - 1;
+
+    if (x < 0)
+        x = 0;
+    if (x >= COLS)
+        x = COLS - 1;
+
+    move (y, x);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_getyx (int *py, int *px)
+{
+    *py = mc_curs_row;
+    *px = mc_curs_col;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_draw_hline (int y, int x, int ch, int len)
+{
+    int x1;
+
+    if (y < 0 || y >= LINES || x >= COLS)
+        return;
+
+    x1 = x;
+
+    if (x < 0)
+    {
+        len += x;
+        if (len <= 0)
+            return;
+        x = 0;
+    }
+
+    if ((chtype) ch == ACS_HLINE)
+        ch = mc_tty_frm[MC_TTY_FRM_HORIZ];
+
+    move (y, x);
+    hline (ch, len);
+    move (y, x1);
+
+    mc_curs_row = y;
+    mc_curs_col = x1;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_draw_vline (int y, int x, int ch, int len)
+{
+    int y1;
+
+    if (x < 0 || x >= COLS || y >= LINES)
+        return;
+
+    y1 = y;
+
+    if (y < 0)
+    {
+        len += y;
+        if (len <= 0)
+            return;
+        y = 0;
+    }
+
+    if ((chtype) ch == ACS_VLINE)
+        ch = mc_tty_frm[MC_TTY_FRM_VERT];
+
+    move (y, x);
+    vline (ch, len);
+    move (y1, x);
+
+    mc_curs_row = y1;
+    mc_curs_col = x;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_fill_region (int y, int x, int rows, int cols, unsigned char ch)
+{
+    int i;
+
+    if (!tty_clip (&y, &x, &rows, &cols))
+        return;
+
+    for (i = 0; i < rows; i++)
+    {
+        move (y + i, x);
+        hline (ch, cols);
+    }
+
+    move (y, x);
+
+    mc_curs_row = y;
+    mc_curs_col = x;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_colorize_area (int y, int x, int rows, int cols, int color)
+{
+#ifdef ENABLE_SHADOWS
+    cchar_t *ctext;
+    wchar_t wch[10];            /* TODO not sure if the length is correct */
+    attr_t attrs;
+    short color_pair;
+
+    if (!use_colors || !tty_clip (&y, &x, &rows, &cols))
+        return;
+
+    tty_setcolor (color);
+    ctext = g_malloc (sizeof (cchar_t) * (cols + 1));
+
+    for (int row = 0; row < rows; row++)
+    {
+        mvin_wchnstr (y + row, x, ctext, cols);
+
+        for (int col = 0; col < cols; col++)
+        {
+            getcchar (&ctext[col], wch, &attrs, &color_pair, NULL);
+            setcchar (&ctext[col], wch, attrs, color, NULL);
+        }
+
+        mvadd_wchnstr (y + row, x, ctext, cols);
+    }
+
+    g_free (ctext);
+#else
+    (void) y;
+    (void) x;
+    (void) rows;
+    (void) cols;
+    (void) color;
+#endif /* ENABLE_SHADOWS */
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_set_alt_charset (gboolean alt_charset)
+{
+    (void) alt_charset;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_display_8bit (gboolean what)
+{
+    meta (stdscr, (int) what);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_print_char (int c)
+{
+    if (yx_in_screen (mc_curs_row, mc_curs_col))
+        addch (c);
+    mc_curs_col++;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_print_anychar (int c)
+{
+    if (mc_global.utf8_display || c > 255)
+    {
+        int res;
+        unsigned char str[UTF8_CHAR_LEN + 1];
+
+        res = g_unichar_to_utf8 (c, (char *) str);
+        if (res == 0)
+        {
+            if (yx_in_screen (mc_curs_row, mc_curs_col))
+                addch ('.');
+            mc_curs_col++;
+        }
+        else
+        {
+            const char *s;
+
+            str[res] = '\0';
+            s = str_term_form ((char *) str);
+
+            if (yx_in_screen (mc_curs_row, mc_curs_col))
+                addstr (s);
+
+            if (g_unichar_iswide (c))
+                mc_curs_col += 2;
+            else if (!g_unichar_iszerowidth (c))
+                mc_curs_col++;
+        }
+    }
+    else
+    {
+        if (yx_in_screen (mc_curs_row, mc_curs_col))
+            addch (c);
+        mc_curs_col++;
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_print_alt_char (int c, gboolean single)
+{
+    if (yx_in_screen (mc_curs_row, mc_curs_col))
+    {
+        if ((chtype) c == ACS_VLINE)
+            c = mc_tty_frm[single ? MC_TTY_FRM_VERT : MC_TTY_FRM_DVERT];
+        else if ((chtype) c == ACS_HLINE)
+            c = mc_tty_frm[single ? MC_TTY_FRM_HORIZ : MC_TTY_FRM_DHORIZ];
+        else if ((chtype) c == ACS_LTEE)
+            c = mc_tty_frm[single ? MC_TTY_FRM_LEFTMIDDLE : MC_TTY_FRM_DLEFTMIDDLE];
+        else if ((chtype) c == ACS_RTEE)
+            c = mc_tty_frm[single ? MC_TTY_FRM_RIGHTMIDDLE : MC_TTY_FRM_DRIGHTMIDDLE];
+        else if ((chtype) c == ACS_ULCORNER)
+            c = mc_tty_frm[single ? MC_TTY_FRM_LEFTTOP : MC_TTY_FRM_DLEFTTOP];
+        else if ((chtype) c == ACS_LLCORNER)
+            c = mc_tty_frm[single ? MC_TTY_FRM_LEFTBOTTOM : MC_TTY_FRM_DLEFTBOTTOM];
+        else if ((chtype) c == ACS_URCORNER)
+            c = mc_tty_frm[single ? MC_TTY_FRM_RIGHTTOP : MC_TTY_FRM_DRIGHTTOP];
+        else if ((chtype) c == ACS_LRCORNER)
+            c = mc_tty_frm[single ? MC_TTY_FRM_RIGHTBOTTOM : MC_TTY_FRM_DRIGHTBOTTOM];
+        else if ((chtype) c == ACS_PLUS)
+            c = mc_tty_frm[MC_TTY_FRM_CROSS];
+
+        addch (c);
+    }
+
+    mc_curs_col++;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_print_string (const char *s)
+{
+    int len;
+    int start = 0;
+
+    s = str_term_form (s);
+    len = str_term_width1 (s);
+
+    /* line is upper or below the screen or entire line is before or after screen */
+    if (mc_curs_row < 0 || mc_curs_row >= LINES || mc_curs_col + len <= 0 || mc_curs_col >= COLS)
+    {
+        mc_curs_col += len;
+        return;
+    }
+
+    /* skip invisible left part */
+    if (mc_curs_col < 0)
+    {
+        start = -mc_curs_col;
+        len += mc_curs_col;
+        mc_curs_col = 0;
+    }
+
+    mc_curs_col += len;
+    if (mc_curs_col >= COLS)
+        len = COLS - (mc_curs_col - len);
+
+    addstr (str_term_substring (s, start, len));
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_printf (const char *fmt, ...)
+{
+    va_list args;
+    char buf[BUF_1K];           /* FIXME: is it enough? */
+
+    va_start (args, fmt);
+    g_vsnprintf (buf, sizeof (buf), fmt, args);
+    va_end (args);
+    tty_print_string (buf);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+char *
+tty_tgetstr (const char *cap)
+{
+    char *unused = NULL;
+
+    return tgetstr ((NCURSES_CONST char *) cap, &unused);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_refresh (void)
+{
+    refresh ();
+    doupdate ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_beep (void)
+{
+    beep ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
diff --git a/lib/tty/tty-ncurses.h b/lib/tty/tty-ncurses.h
new file mode 100644
index 0000000..8feb17c
--- /dev/null
+++ b/lib/tty/tty-ncurses.h
@@ -0,0 +1,50 @@
+
+#ifndef MC__TTY_NCURSES_H
+#define MC__TTY_NCURSES_H
+
+/* for cchar_t, getcchar(), setcchar() */
+#ifndef _XOPEN_SOURCE_EXTENDED
+#define _XOPEN_SOURCE_EXTENDED
+#endif
+
+#ifdef USE_NCURSES
+#ifdef HAVE_NCURSES_CURSES_H
+#include <ncurses/curses.h>
+#elif defined (HAVE_NCURSES_NCURSES_H)
+#include <ncurses/ncurses.h>
+#elif defined (HAVE_NCURSESW_CURSES_H)
+#include <ncursesw/curses.h>
+#elif defined (HAVE_NCURSES_HCURSES_H) || defined (HAVE_NCURSES_H)
+#include <ncurses.h>
+#else
+#include <curses.h>
+#endif
+#endif /* USE_NCURSES */
+
+#ifdef USE_NCURSESW
+#include <ncursesw/curses.h>
+#endif /* USE_NCURSESW */
+
+/* netbsd-libcurses doesn't define NCURSES_CONST */
+#ifndef NCURSES_CONST
+#define NCURSES_CONST const
+#endif
+
+/* do not draw shadows if NCurses is built with --disable-widec */
+#if defined(NCURSES_WIDECHAR) && NCURSES_WIDECHAR
+#define ENABLE_SHADOWS 1
+#endif
+
+/*** typedefs(not structures) and defined constants **********************************************/
+
+/*** enums ***************************************************************************************/
+
+/*** structures declarations (and typedefs of structures)*****************************************/
+
+/*** global variables defined in .c file *********************************************************/
+
+/*** declarations of public functions ************************************************************/
+
+/*** inline functions ****************************************************************************/
+
+#endif /* MC_TTY_NCURSES_H */
diff --git a/lib/tty/tty-slang.c b/lib/tty/tty-slang.c
new file mode 100644
index 0000000..cf2e779
--- /dev/null
+++ b/lib/tty/tty-slang.c
@@ -0,0 +1,779 @@
+/*
+   Interface to the terminal controlling library.
+   Slang wrapper.
+
+   Copyright (C) 2005-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Andrew Borodin <aborodin@vmail.ru>, 2009
+   Egmont Koblinger <egmont@gmail.com>, 2010
+
+   This file is part of the Midnight Commander.
+
+   The Midnight Commander is free software: you can redistribute it
+   and/or modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   The Midnight Commander 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file
+ *  \brief Source: S-Lang-based tty layer of Midnight Commander
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>          /* size_t */
+#include <unistd.h>
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+#include <termios.h>
+
+#include "lib/global.h"
+#include "lib/strutil.h"        /* str_term_form */
+#include "lib/util.h"           /* is_printable() */
+
+#include "tty-internal.h"       /* mc_tty_normalize_from_utf8() */
+#include "tty.h"
+#include "color.h"
+#include "color-slang.h"
+#include "color-internal.h"
+#include "mouse.h"              /* Gpm_Event is required in key.h */
+#include "key.h"                /* define_sequence */
+#include "win.h"
+
+
+/*** global variables ****************************************************************************/
+
+/* If true program softkeys (HP terminals only) on startup and after every
+   command ran in the subshell to the description found in the termcap/terminfo
+   database */
+int reset_hp_softkeys = 0;
+
+/*** file scope macro definitions ****************************************************************/
+
+#ifndef SLTT_MAX_SCREEN_COLS
+#define SLTT_MAX_SCREEN_COLS 512
+#endif
+
+#ifndef SLTT_MAX_SCREEN_ROWS
+#define SLTT_MAX_SCREEN_ROWS 512
+#endif
+
+/*** file scope type declarations ****************************************************************/
+
+/*** file scope variables ************************************************************************/
+
+/* Various saved termios settings that we control here */
+static struct termios boot_mode;
+static struct termios new_mode;
+
+/* Controls whether we should wait for input in tty_lowlevel_getch */
+static gboolean no_slang_delay;
+
+static gboolean slsmg_active = FALSE;
+
+/* This table describes which capabilities we want and which values we
+ * assign to them.
+ */
+static const struct
+{
+    int key_code;
+    const char *key_name;
+} key_table[] =
+{
+    /* *INDENT-OFF* */
+    { KEY_F (0), "k0" },
+    { KEY_F (1), "k1" },
+    { KEY_F (2), "k2" },
+    { KEY_F (3), "k3" },
+    { KEY_F (4), "k4" },
+    { KEY_F (5), "k5" },
+    { KEY_F (6), "k6" },
+    { KEY_F (7), "k7" },
+    { KEY_F (8), "k8" },
+    { KEY_F (9), "k9" },
+    { KEY_F (10), "k;" },
+    { KEY_F (11), "F1" },
+    { KEY_F (12), "F2" },
+    { KEY_F (13), "F3" },
+    { KEY_F (14), "F4" },
+    { KEY_F (15), "F5" },
+    { KEY_F (16), "F6" },
+    { KEY_F (17), "F7" },
+    { KEY_F (18), "F8" },
+    { KEY_F (19), "F9" },
+    { KEY_F (20), "FA" },
+    { KEY_IC, "kI" },
+    { KEY_NPAGE, "kN" },
+    { KEY_PPAGE, "kP" },
+    { KEY_LEFT, "kl" },
+    { KEY_RIGHT, "kr" },
+    { KEY_UP, "ku" },
+    { KEY_DOWN, "kd" },
+    { KEY_DC, "kD" },
+    { KEY_BACKSPACE, "kb" },
+    { KEY_HOME, "kh" },
+    { KEY_END, "@7" },
+    { 0, NULL }
+    /* *INDENT-ON* */
+};
+
+/* --------------------------------------------------------------------------------------------- */
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+tty_setup_sigwinch (void (*handler) (int))
+{
+    (void) SLsignal (SIGWINCH, handler);
+    tty_create_winch_pipe ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+sigwinch_handler (int dummy)
+{
+    ssize_t n = 0;
+
+    (void) dummy;
+
+    n = write (sigwinch_pipe[1], "", 1);
+    (void) n;
+
+    (void) SLsignal (SIGWINCH, sigwinch_handler);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+/* HP Terminals have capabilities (pfkey, pfloc, pfx) to program function keys.
+   elm 2.4pl15 invoked with the -K option utilizes these softkeys and the
+   consequence is that function keys don't work in MC sometimes...
+   Unfortunately I don't now the one and only escape sequence to turn off.
+   softkeys (elm uses three different capabilities to turn on softkeys and two.
+   capabilities to turn them off)..
+   Among other things elm uses the pair we already use in slang_keypad. That's.
+   the reason why I call slang_reset_softkeys from slang_keypad. In lack of
+   something better the softkeys are programmed to their defaults from the
+   termcap/terminfo database.
+   The escape sequence to program the softkeys is taken from elm and it is.
+   hardcoded because neither slang nor ncurses 4.1 know how to 'printf' this.
+   sequence. -- Norbert
+ */
+
+static void
+slang_reset_softkeys (void)
+{
+    int key;
+    static const char display[] = "                ";
+    char tmp[BUF_SMALL];
+
+    for (key = 1; key < 9; key++)
+    {
+        char *send;
+
+        g_snprintf (tmp, sizeof (tmp), "k%d", key);
+        send = SLtt_tgetstr (tmp);
+        if (send != NULL)
+        {
+            g_snprintf (tmp, sizeof (tmp), ESC_STR "&f%dk%dd%dL%s%s", key,
+                        (int) (sizeof (display) - 1), (int) strlen (send), display, send);
+            SLtt_write_string (tmp);
+        }
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+do_define_key (int code, const char *strcap)
+{
+    char *seq;
+
+    seq = SLtt_tgetstr ((SLFUTURE_CONST char *) strcap);
+    if (seq != NULL)
+        define_sequence (code, seq, MCKEY_NOACTION);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+load_terminfo_keys (void)
+{
+    int i;
+
+    for (i = 0; key_table[i].key_code; i++)
+        do_define_key (key_table[i].key_code, key_table[i].key_name);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+int
+mc_tty_normalize_lines_char (const char *str)
+{
+    char *str2;
+    int res;
+
+    struct mc_tty_lines_struct
+    {
+        const char *line;
+        int line_code;
+    } const lines_codes[] = {
+        {"\342\224\214", SLSMG_ULCORN_CHAR},
+        {"\342\224\220", SLSMG_URCORN_CHAR},
+        {"\342\224\224", SLSMG_LLCORN_CHAR},
+        {"\342\224\230", SLSMG_LRCORN_CHAR},
+        {"\342\224\234", SLSMG_LTEE_CHAR},
+        {"\342\224\244", SLSMG_RTEE_CHAR},
+        {"\342\224\254", SLSMG_UTEE_CHAR},
+        {"\342\224\264", SLSMG_DTEE_CHAR},
+        {"\342\224\200", SLSMG_HLINE_CHAR},
+        {"\342\224\202", SLSMG_VLINE_CHAR},
+        {"\342\224\274", SLSMG_PLUS_CHAR},
+
+        {NULL, 0}
+    };
+
+    if (!str)
+        return (int) ' ';
+
+    for (res = 0; lines_codes[res].line; res++)
+    {
+        if (strcmp (str, lines_codes[res].line) == 0)
+            return lines_codes[res].line_code;
+    }
+
+    str2 = mc_tty_normalize_from_utf8 (str);
+    res = g_utf8_get_char_validated (str2, -1);
+
+    if (res < 0)
+        res = (unsigned char) str2[0];
+    g_free (str2);
+
+    return res;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_init (gboolean mouse_enable, gboolean is_xterm)
+{
+    SLtt_Ignore_Beep = 1;
+
+    SLutf8_enable (-1);         /* has to be called first before any of the other functions. */
+    SLtt_get_terminfo ();
+    /*
+     * If the terminal in not in terminfo but begins with a well-known
+     * string such as "linux" or "xterm" S-Lang will go on, but the
+     * terminal size and several other variables won't be initialized
+     * (as of S-Lang 1.4.4). Detect it and abort. Also detect extremely
+     * small screen dimensions.
+     */
+    if ((COLS < 10) || (LINES < 5)
+#if SLANG_VERSION < 20303
+        /* Beginning from pre2.3.3-8 (55f58798c267d76a1b93d0d916027b71a10ac1ee),
+           these limitations were eliminated. */
+        || (COLS > SLTT_MAX_SCREEN_COLS) || (LINES > SLTT_MAX_SCREEN_ROWS)
+#endif
+        )
+    {
+        fprintf (stderr,
+                 _("Screen size %dx%d is not supported.\n"
+                   "Check the TERM environment variable.\n"), COLS, LINES);
+        exit (EXIT_FAILURE);
+    }
+
+    tcgetattr (fileno (stdin), &boot_mode);
+    /* 255 = ignore abort char; XCTRL('g') for abort char = ^g */
+    SLang_init_tty (XCTRL ('g'), 1, 0);
+
+    if (mc_global.tty.ugly_line_drawing)
+        SLtt_Has_Alt_Charset = 0;
+
+    tcgetattr (SLang_TT_Read_FD, &new_mode);
+
+    tty_reset_prog_mode ();
+    load_terminfo_keys ();
+
+    SLtt_Blink_Mode = (tty_use_256colors (NULL) || tty_use_truecolors (NULL)) ? 1 : 0;
+
+    tty_start_interrupt_key ();
+
+    /* It's the small part from the previous init_key() */
+    init_key_input_fd ();
+
+    /* For 8-bit locales, NCurses handles 154 (0x9A) symbol properly, while S-Lang
+     * requires SLsmg_Display_Eight_Bit >= 154 (OR manual filtering if xterm display
+     * detected - but checking TERM would fail under screen, OR running xterm
+     * with allowC1Printable).
+     */
+    tty_display_8bit (FALSE);
+
+    SLsmg_init_smg ();
+    slsmg_active = TRUE;
+    if (!mouse_enable)
+        use_mouse_p = MOUSE_DISABLED;
+    tty_init_xterm_support (is_xterm);  /* do it before tty_enter_ca_mode() call */
+    tty_enter_ca_mode ();
+    tty_keypad (TRUE);
+    tty_nodelay (FALSE);
+
+    tty_setup_sigwinch (sigwinch_handler);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_shutdown (void)
+{
+    char *op_cap;
+
+    tty_destroy_winch_pipe ();
+    tty_reset_shell_mode ();
+    tty_noraw_mode ();
+    tty_keypad (FALSE);
+    tty_reset_screen ();
+    tty_exit_ca_mode ();
+    SLang_reset_tty ();
+    slsmg_active = FALSE;
+
+    /* Load the op capability to reset the colors to those that were 
+     * active when the program was started up 
+     */
+    op_cap = SLtt_tgetstr ((SLFUTURE_CONST char *) "op");
+    if (op_cap != NULL)
+    {
+        fputs (op_cap, stdout);
+        fflush (stdout);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_enter_ca_mode (void)
+{
+    /* S-Lang handles alternate screen switching and cursor position saving */
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_exit_ca_mode (void)
+{
+    /* S-Lang handles alternate screen switching and cursor position restoring */
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_change_screen_size (void)
+{
+    SLtt_get_screen_size ();
+    if (slsmg_active)
+        SLsmg_reinit_smg ();
+
+#ifdef ENABLE_SUBSHELL
+    if (mc_global.tty.use_subshell)
+        tty_resize (mc_global.tty.subshell_pty);
+#endif
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/* Done each time we come back from done mode */
+
+void
+tty_reset_prog_mode (void)
+{
+    tcsetattr (SLang_TT_Read_FD, TCSANOW, &new_mode);
+    SLsmg_init_smg ();
+    slsmg_active = TRUE;
+    SLsmg_touch_lines (0, LINES);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/* Called each time we want to shutdown slang screen manager */
+
+void
+tty_reset_shell_mode (void)
+{
+    tcsetattr (SLang_TT_Read_FD, TCSANOW, &boot_mode);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_raw_mode (void)
+{
+    tcsetattr (SLang_TT_Read_FD, TCSANOW, &new_mode);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_noraw_mode (void)
+{
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_noecho (void)
+{
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+int
+tty_flush_input (void)
+{
+    return 0;                   /* OK */
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_keypad (gboolean set)
+{
+    char *keypad_string;
+
+    keypad_string = SLtt_tgetstr ((SLFUTURE_CONST char *) (set ? "ks" : "ke"));
+    if (keypad_string != NULL)
+        SLtt_write_string (keypad_string);
+    if (set && reset_hp_softkeys)
+        slang_reset_softkeys ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_nodelay (gboolean set)
+{
+    no_slang_delay = set;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+int
+tty_baudrate (void)
+{
+    return SLang_TT_Baud_Rate;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+int
+tty_lowlevel_getch (void)
+{
+    int c;
+
+    if (no_slang_delay && (SLang_input_pending (0) == 0))
+        return -1;
+
+    c = SLang_getkey ();
+    if (c == SLANG_GETKEY_ERROR)
+    {
+        fprintf (stderr,
+                 "SLang_getkey returned SLANG_GETKEY_ERROR\n"
+                 "Assuming EOF on stdin and exiting\n");
+        exit (EXIT_FAILURE);
+    }
+
+    return c;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+int
+tty_reset_screen (void)
+{
+    SLsmg_reset_smg ();
+    slsmg_active = FALSE;
+    return 0;                   /* OK */
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_touch_screen (void)
+{
+    SLsmg_touch_lines (0, LINES);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_gotoyx (int y, int x)
+{
+    SLsmg_gotorc (y, x);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_getyx (int *py, int *px)
+{
+    *py = SLsmg_get_row ();
+    *px = SLsmg_get_column ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_draw_hline (int y, int x, int ch, int len)
+{
+    int x1;
+
+    if (y < 0 || y >= LINES || x >= COLS)
+        return;
+
+    x1 = x;
+
+    if (x < 0)
+    {
+        len += x;
+        if (len <= 0)
+            return;
+        x = 0;
+    }
+
+    if (ch == ACS_HLINE)
+        ch = mc_tty_frm[MC_TTY_FRM_HORIZ];
+    if (ch == 0)
+        ch = ACS_HLINE;
+
+    SLsmg_gotorc (y, x);
+
+    if (ch == ACS_HLINE)
+        SLsmg_draw_hline (len);
+    else
+        while (len-- != 0)
+            tty_print_char (ch);
+
+    SLsmg_gotorc (y, x1);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_draw_vline (int y, int x, int ch, int len)
+{
+    int y1;
+
+    if (x < 0 || x >= COLS || y >= LINES)
+        return;
+
+    y1 = y;
+
+    if (y < 0)
+    {
+        len += y;
+        if (len <= 0)
+            return;
+        y = 0;
+    }
+
+    if (ch == ACS_VLINE)
+        ch = mc_tty_frm[MC_TTY_FRM_VERT];
+    if (ch == 0)
+        ch = ACS_VLINE;
+
+    SLsmg_gotorc (y, x);
+
+    if (ch == ACS_VLINE)
+        SLsmg_draw_vline (len);
+    else
+    {
+        int pos = 0;
+
+        while (len-- != 0)
+        {
+            SLsmg_gotorc (y + pos, x);
+            tty_print_char (ch);
+            pos++;
+        }
+    }
+
+    SLsmg_gotorc (y1, x);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_fill_region (int y, int x, int rows, int cols, unsigned char ch)
+{
+    SLsmg_fill_region (y, x, rows, cols, ch);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_colorize_area (int y, int x, int rows, int cols, int color)
+{
+    if (use_colors)
+        SLsmg_set_color_in_region (color, y, x, rows, cols);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_set_alt_charset (gboolean alt_charset)
+{
+    SLsmg_set_char_set ((int) alt_charset);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_display_8bit (gboolean what)
+{
+    SLsmg_Display_Eight_Bit = what ? 128 : 160;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_print_char (int c)
+{
+    SLsmg_write_char ((SLwchar_Type) ((unsigned int) c));
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_print_alt_char (int c, gboolean single)
+{
+#define DRAW(x, y) (x == y) \
+       ? SLsmg_draw_object (SLsmg_get_row(), SLsmg_get_column(), x) \
+       : SLsmg_write_char ((unsigned int) y)
+    switch (c)
+    {
+    case ACS_VLINE:
+        DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_VERT : MC_TTY_FRM_DVERT]);
+        break;
+    case ACS_HLINE:
+        DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_HORIZ : MC_TTY_FRM_DHORIZ]);
+        break;
+    case ACS_LTEE:
+        DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_LEFTMIDDLE : MC_TTY_FRM_DLEFTMIDDLE]);
+        break;
+    case ACS_RTEE:
+        DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_RIGHTMIDDLE : MC_TTY_FRM_DRIGHTMIDDLE]);
+        break;
+    case ACS_TTEE:
+        DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_TOPMIDDLE : MC_TTY_FRM_DTOPMIDDLE]);
+        break;
+    case ACS_BTEE:
+        DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_BOTTOMMIDDLE : MC_TTY_FRM_DBOTTOMMIDDLE]);
+        break;
+    case ACS_ULCORNER:
+        DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_LEFTTOP : MC_TTY_FRM_DLEFTTOP]);
+        break;
+    case ACS_LLCORNER:
+        DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_LEFTBOTTOM : MC_TTY_FRM_DLEFTBOTTOM]);
+        break;
+    case ACS_URCORNER:
+        DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_RIGHTTOP : MC_TTY_FRM_DRIGHTTOP]);
+        break;
+    case ACS_LRCORNER:
+        DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_RIGHTBOTTOM : MC_TTY_FRM_DRIGHTBOTTOM]);
+        break;
+    case ACS_PLUS:
+        DRAW (c, mc_tty_frm[MC_TTY_FRM_CROSS]);
+        break;
+    default:
+        SLsmg_write_char ((unsigned int) c);
+    }
+#undef DRAW
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_print_anychar (int c)
+{
+    if (c > 255)
+    {
+        char str[UTF8_CHAR_LEN + 1];
+        int res;
+
+        res = g_unichar_to_utf8 (c, str);
+        if (res == 0)
+        {
+            str[0] = '.';
+            str[1] = '\0';
+        }
+        else
+        {
+            str[res] = '\0';
+        }
+        SLsmg_write_string ((char *) str_term_form (str));
+    }
+    else
+    {
+        if (!is_printable (c))
+            c = '.';
+        SLsmg_write_char ((SLwchar_Type) ((unsigned int) c));
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_print_string (const char *s)
+{
+    SLsmg_write_string ((char *) str_term_form (s));
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_printf (const char *fmt, ...)
+{
+    va_list args;
+
+    va_start (args, fmt);
+    SLsmg_vprintf ((char *) fmt, args);
+    va_end (args);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+char *
+tty_tgetstr (const char *cap)
+{
+    return SLtt_tgetstr ((SLFUTURE_CONST char *) cap);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_refresh (void)
+{
+    SLsmg_refresh ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_beep (void)
+{
+    SLtt_beep ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
diff --git a/lib/tty/tty-slang.h b/lib/tty/tty-slang.h
new file mode 100644
index 0000000..eeaade3
--- /dev/null
+++ b/lib/tty/tty-slang.h
@@ -0,0 +1,48 @@
+
+#ifndef MC__TTY_SLANG_H
+#define MC__TTY_SLANG_H
+
+#include <slang.h>
+
+/*** typedefs(not structures) and defined constants **********************************************/
+
+#define KEY_F(x) (1000 + x)
+
+#define ACS_VLINE    SLSMG_VLINE_CHAR
+#define ACS_HLINE    SLSMG_HLINE_CHAR
+#define ACS_LTEE     SLSMG_LTEE_CHAR
+#define ACS_RTEE     SLSMG_RTEE_CHAR
+#define ACS_TTEE     SLSMG_UTEE_CHAR
+#define ACS_BTEE     SLSMG_DTEE_CHAR
+#define ACS_ULCORNER SLSMG_ULCORN_CHAR
+#define ACS_LLCORNER SLSMG_LLCORN_CHAR
+#define ACS_URCORNER SLSMG_URCORN_CHAR
+#define ACS_LRCORNER SLSMG_LRCORN_CHAR
+#define ACS_PLUS     SLSMG_PLUS_CHAR
+
+#define COLS  SLtt_Screen_Cols
+#define LINES SLtt_Screen_Rows
+
+#define ENABLE_SHADOWS 1
+
+/*** enums ***************************************************************************************/
+
+enum
+{
+    KEY_BACKSPACE = 400,
+    KEY_END, KEY_UP, KEY_DOWN, KEY_LEFT, KEY_RIGHT,
+    KEY_HOME, KEY_A1, KEY_C1, KEY_NPAGE, KEY_PPAGE, KEY_IC,
+    KEY_ENTER, KEY_DC, KEY_SCANCEL, KEY_BTAB
+};
+
+/*** structures declarations (and typedefs of structures)*****************************************/
+
+/*** global variables defined in .c file *********************************************************/
+
+extern int reset_hp_softkeys;
+
+/*** declarations of public functions ************************************************************/
+
+/*** inline functions ****************************************************************************/
+
+#endif /* MC_TTY_SLANG_H */
diff --git a/lib/tty/tty.c b/lib/tty/tty.c
new file mode 100644
index 0000000..60b138e
--- /dev/null
+++ b/lib/tty/tty.c
@@ -0,0 +1,413 @@
+/*
+   Interface to the terminal controlling library.
+
+   Copyright (C) 2005-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Roland Illig <roland.illig@gmx.de>, 2005.
+   Andrew Borodin <aborodin@vmail.ru>, 2009.
+
+   This file is part of the Midnight Commander.
+
+   The Midnight Commander is free software: you can redistribute it
+   and/or modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   The Midnight Commander 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file tty.c
+ *  \brief Source: %interface to the terminal controlling library
+ */
+
+#include <config.h>
+
+#include <errno.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>             /* memset() */
+
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#else
+#include <sys/time.h>
+#include <sys/types.h>
+#endif
+#include <unistd.h>             /* exit() */
+
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+
+/* In some systems (like Solaris 11.4 SPARC), TIOCSWINSZ is defined in termios.h */
+#include <termios.h>
+
+#include "lib/global.h"
+#include "lib/strutil.h"
+
+#include "tty.h"
+#include "tty-internal.h"
+#include "color.h"              /* tty_set_normal_attrs() */
+#include "mouse.h"              /* use_mouse_p */
+#include "win.h"
+
+/*** global variables ****************************************************************************/
+
+int mc_tty_frm[MC_TTY_FRM_MAX];
+
+/*** file scope macro definitions ****************************************************************/
+
+/*** file scope type declarations ****************************************************************/
+
+/*** file scope variables ************************************************************************/
+
+static SIG_ATOMIC_VOLATILE_T got_interrupt = 0;
+
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+sigintr_handler (int signo)
+{
+    (void) &signo;
+    got_interrupt = 1;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+/**
+ * Check terminal type. If $TERM is not set or value is empty, mc finishes with EXIT_FAILURE.
+ *
+ * @param force_xterm Set forced the XTerm type
+ *
+ * @return true if @param force_xterm is true or value of $TERM is one of following:
+ *         term*
+ *         konsole*
+ *         rxvt*
+ *         Eterm
+ *         dtterm
+ *         alacritty*
+ *         foot*
+ *         screen*
+ *         tmux*
+ *         contour*
+ */
+gboolean
+tty_check_term (gboolean force_xterm)
+{
+    const char *termvalue;
+
+    termvalue = getenv ("TERM");
+    if (termvalue == NULL || *termvalue == '\0')
+    {
+        fputs (_("The TERM environment variable is unset!\n"), stderr);
+        exit (EXIT_FAILURE);
+    }
+
+    /* *INDENT-OFF* */
+    return force_xterm
+        || strncmp (termvalue, "xterm", 5) == 0
+        || strncmp (termvalue, "konsole", 7) == 0
+        || strncmp (termvalue, "rxvt", 4) == 0
+        || strcmp (termvalue, "Eterm") == 0
+        || strcmp (termvalue, "dtterm") == 0
+        || strncmp (termvalue, "alacritty", 9) == 0
+        || strncmp (termvalue, "foot", 4) == 0
+        || strncmp (termvalue, "screen", 6) == 0
+        || strncmp (termvalue, "tmux", 4) == 0
+        || strncmp (termvalue, "contour", 7) == 0;
+    /* *INDENT-ON* */
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+extern void
+tty_start_interrupt_key (void)
+{
+    struct sigaction act;
+
+    memset (&act, 0, sizeof (act));
+    act.sa_handler = sigintr_handler;
+    sigemptyset (&act.sa_mask);
+#ifdef SA_RESTART
+    act.sa_flags = SA_RESTART;
+#endif /* SA_RESTART */
+    sigaction (SIGINT, &act, NULL);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+extern void
+tty_enable_interrupt_key (void)
+{
+    struct sigaction act;
+
+    memset (&act, 0, sizeof (act));
+    act.sa_handler = sigintr_handler;
+    sigemptyset (&act.sa_mask);
+    sigaction (SIGINT, &act, NULL);
+    got_interrupt = 0;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+extern void
+tty_disable_interrupt_key (void)
+{
+    struct sigaction act;
+
+    memset (&act, 0, sizeof (act));
+    act.sa_handler = SIG_IGN;
+    sigemptyset (&act.sa_mask);
+    sigaction (SIGINT, &act, NULL);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+extern gboolean
+tty_got_interrupt (void)
+{
+    gboolean rv;
+
+    rv = (got_interrupt != 0);
+    got_interrupt = 0;
+    return rv;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+gboolean
+tty_got_winch (void)
+{
+    fd_set fdset;
+    /* *INDENT-OFF* */
+    /* instant timeout */
+    struct timeval timeout = { .tv_sec = 0, .tv_usec = 0 };
+    /* *INDENT-ON* */
+    int ok;
+
+    FD_ZERO (&fdset);
+    FD_SET (sigwinch_pipe[0], &fdset);
+
+    while ((ok = select (sigwinch_pipe[0] + 1, &fdset, NULL, NULL, &timeout)) < 0)
+        if (errno != EINTR)
+        {
+            perror (_("Cannot check SIGWINCH pipe"));
+            exit (EXIT_FAILURE);
+        }
+
+    return (ok != 0 && FD_ISSET (sigwinch_pipe[0], &fdset));
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_flush_winch (void)
+{
+    ssize_t n;
+
+    /* merge all SIGWINCH events raised to this moment */
+    do
+    {
+        char x[16];
+
+        /* read multiple events at a time  */
+        n = read (sigwinch_pipe[0], &x, sizeof (x));
+    }
+    while (n > 0 || (n == -1 && errno == EINTR));
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_print_one_hline (gboolean single)
+{
+    tty_print_alt_char (ACS_HLINE, single);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_print_one_vline (gboolean single)
+{
+    tty_print_alt_char (ACS_VLINE, single);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_draw_box (int y, int x, int ys, int xs, gboolean single)
+{
+    int y2, x2;
+
+    if (ys <= 0 || xs <= 0)
+        return;
+
+    ys--;
+    xs--;
+
+    y2 = y + ys;
+    x2 = x + xs;
+
+    tty_draw_vline (y, x, mc_tty_frm[single ? MC_TTY_FRM_VERT : MC_TTY_FRM_DVERT], ys);
+    tty_draw_vline (y, x2, mc_tty_frm[single ? MC_TTY_FRM_VERT : MC_TTY_FRM_DVERT], ys);
+    tty_draw_hline (y, x, mc_tty_frm[single ? MC_TTY_FRM_HORIZ : MC_TTY_FRM_DHORIZ], xs);
+    tty_draw_hline (y2, x, mc_tty_frm[single ? MC_TTY_FRM_HORIZ : MC_TTY_FRM_DHORIZ], xs);
+    tty_gotoyx (y, x);
+    tty_print_alt_char (ACS_ULCORNER, single);
+    tty_gotoyx (y2, x);
+    tty_print_alt_char (ACS_LLCORNER, single);
+    tty_gotoyx (y, x2);
+    tty_print_alt_char (ACS_URCORNER, single);
+    tty_gotoyx (y2, x2);
+    tty_print_alt_char (ACS_LRCORNER, single);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_draw_box_shadow (int y, int x, int rows, int cols, int shadow_color)
+{
+    /* draw right shadow */
+    tty_colorize_area (y + 1, x + cols, rows - 1, 2, shadow_color);
+    /* draw bottom shadow */
+    tty_colorize_area (y + rows, x + 2, 1, cols, shadow_color);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+char *
+mc_tty_normalize_from_utf8 (const char *str)
+{
+    GIConv conv;
+    GString *buffer;
+    const char *_system_codepage = str_detect_termencoding ();
+
+    if (str_isutf8 (_system_codepage))
+        return g_strdup (str);
+
+    conv = g_iconv_open (_system_codepage, "UTF-8");
+    if (conv == INVALID_CONV)
+        return g_strdup (str);
+
+    buffer = g_string_new ("");
+
+    if (str_convert (conv, str, buffer) == ESTR_FAILURE)
+    {
+        g_string_free (buffer, TRUE);
+        str_close_conv (conv);
+        return g_strdup (str);
+    }
+    str_close_conv (conv);
+
+    return g_string_free (buffer, FALSE);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+/** Resize given terminal using TIOCSWINSZ, return ioctl() result */
+int
+tty_resize (int fd)
+{
+#if defined TIOCSWINSZ
+    struct winsize tty_size;
+
+    tty_size.ws_row = LINES;
+    tty_size.ws_col = COLS;
+    tty_size.ws_xpixel = tty_size.ws_ypixel = 0;
+
+    return ioctl (fd, TIOCSWINSZ, &tty_size);
+#else
+    return 0;
+#endif
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+/** Clear screen */
+void
+tty_clear_screen (void)
+{
+    tty_set_normal_attrs ();
+    tty_fill_region (0, 0, LINES, COLS, ' ');
+    tty_refresh ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+tty_init_xterm_support (gboolean is_xterm)
+{
+    const char *termvalue;
+
+    termvalue = getenv ("TERM");
+
+    /* Check mouse and ca capabilities */
+    /* terminfo/termcap structures have been already initialized,
+       in slang_init() or/and init_curses()  */
+    /* Check terminfo at first, then check termcap */
+    xmouse_seq = tty_tgetstr ("kmous");
+    if (xmouse_seq == NULL)
+        xmouse_seq = tty_tgetstr ("Km");
+    smcup = tty_tgetstr ("smcup");
+    if (smcup == NULL)
+        smcup = tty_tgetstr ("ti");
+    rmcup = tty_tgetstr ("rmcup");
+    if (rmcup == NULL)
+        rmcup = tty_tgetstr ("te");
+
+    if (strcmp (termvalue, "cygwin") == 0)
+    {
+        is_xterm = TRUE;
+        use_mouse_p = MOUSE_DISABLED;
+    }
+
+    if (is_xterm)
+    {
+        /* Default to the standard xterm sequence */
+        if (xmouse_seq == NULL)
+            xmouse_seq = ESC_STR "[M";
+
+        /* Enable mouse unless explicitly disabled by --nomouse */
+        if (use_mouse_p != MOUSE_DISABLED)
+        {
+            if (mc_global.tty.old_mouse)
+                use_mouse_p = MOUSE_XTERM_NORMAL_TRACKING;
+            else
+            {
+                /* FIXME: this dirty hack to set supported type of tracking the mouse */
+                const char *color_term = getenv ("COLORTERM");
+                if (strncmp (termvalue, "rxvt", 4) == 0 ||
+                    (color_term != NULL && strncmp (color_term, "rxvt", 4) == 0) ||
+                    strcmp (termvalue, "Eterm") == 0)
+                    use_mouse_p = MOUSE_XTERM_NORMAL_TRACKING;
+                else
+                    use_mouse_p = MOUSE_XTERM_BUTTON_EVENT_TRACKING;
+            }
+        }
+    }
+
+    /* There's only one termcap entry "kmous", typically containing "\E[M" or "\E[<".
+     * We need the former in xmouse_seq, the latter in xmouse_extended_seq.
+     * See tickets 2956, 3954, and 4063 for details. */
+    if (xmouse_seq != NULL)
+    {
+        if (strcmp (xmouse_seq, ESC_STR "[<") == 0)
+            xmouse_seq = ESC_STR "[M";
+
+        xmouse_extended_seq = ESC_STR "[<";
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
diff --git a/lib/tty/tty.h b/lib/tty/tty.h
new file mode 100644
index 0000000..90cbbc6
--- /dev/null
+++ b/lib/tty/tty.h
@@ -0,0 +1,146 @@
+
+/** \file tty.h
+ *  \brief Header: %interface to the terminal controlling library
+ *
+ *  This file is the %interface to the terminal controlling library:
+ *  slang or ncurses. It provides an additional layer of abstraction
+ *  above the "real" libraries to keep the number of ifdefs in the other
+ *  files small.
+ */
+
+#ifndef MC__TTY_H
+#define MC__TTY_H
+
+#include "lib/global.h"         /* include <glib.h> */
+
+#ifdef HAVE_SLANG
+#include "tty-slang.h"
+#else
+#include "tty-ncurses.h"
+#endif
+
+/*** typedefs(not structures) and defined constants **********************************************/
+
+#define KEY_KP_ADD      4001
+#define KEY_KP_SUBTRACT 4002
+#define KEY_KP_MULTIPLY 4003
+
+/*** enums ***************************************************************************************/
+
+typedef enum
+{
+    /* single lines */
+    MC_TTY_FRM_VERT,
+    MC_TTY_FRM_HORIZ,
+    MC_TTY_FRM_LEFTTOP,
+    MC_TTY_FRM_RIGHTTOP,
+    MC_TTY_FRM_LEFTBOTTOM,
+    MC_TTY_FRM_RIGHTBOTTOM,
+    MC_TTY_FRM_TOPMIDDLE,
+    MC_TTY_FRM_BOTTOMMIDDLE,
+    MC_TTY_FRM_LEFTMIDDLE,
+    MC_TTY_FRM_RIGHTMIDDLE,
+    MC_TTY_FRM_CROSS,
+
+    /* double lines */
+    MC_TTY_FRM_DVERT,
+    MC_TTY_FRM_DHORIZ,
+    MC_TTY_FRM_DLEFTTOP,
+    MC_TTY_FRM_DRIGHTTOP,
+    MC_TTY_FRM_DLEFTBOTTOM,
+    MC_TTY_FRM_DRIGHTBOTTOM,
+    MC_TTY_FRM_DTOPMIDDLE,
+    MC_TTY_FRM_DBOTTOMMIDDLE,
+    MC_TTY_FRM_DLEFTMIDDLE,
+    MC_TTY_FRM_DRIGHTMIDDLE,
+
+    MC_TTY_FRM_MAX
+} mc_tty_frm_t;
+
+/*** structures declarations (and typedefs of structures)*****************************************/
+
+/*** global variables defined in .c file *********************************************************/
+
+extern int mc_tty_frm[];
+
+extern char *tty_tgetstr (const char *name);
+
+/*** declarations of public functions ************************************************************/
+
+extern void tty_beep (void);
+
+/* {{{ Input }}} */
+
+extern gboolean tty_check_term (gboolean force_xterm);
+extern void tty_init (gboolean mouse_enable, gboolean is_xterm);
+extern void tty_shutdown (void);
+
+extern void tty_start_interrupt_key (void);
+extern void tty_enable_interrupt_key (void);
+extern void tty_disable_interrupt_key (void);
+extern gboolean tty_got_interrupt (void);
+
+extern gboolean tty_got_winch (void);
+extern void tty_flush_winch (void);
+
+extern void tty_reset_prog_mode (void);
+extern void tty_reset_shell_mode (void);
+
+extern void tty_raw_mode (void);
+extern void tty_noraw_mode (void);
+
+extern void tty_noecho (void);
+extern int tty_flush_input (void);
+
+extern void tty_keypad (gboolean set);
+extern void tty_nodelay (gboolean set);
+extern int tty_baudrate (void);
+
+/* {{{ Output }}} */
+
+/*
+   The output functions do not check themselves for screen overflows,
+   so make sure that you never write more than what fits on the screen.
+   While SLang provides such a feature, ncurses does not.
+ */
+
+extern int tty_reset_screen (void);
+extern void tty_touch_screen (void);
+
+extern void tty_gotoyx (int y, int x);
+extern void tty_getyx (int *py, int *px);
+
+extern void tty_set_alt_charset (gboolean alt_charset);
+
+extern void tty_display_8bit (gboolean what);
+extern void tty_print_char (int c);
+extern void tty_print_alt_char (int c, gboolean single);
+extern void tty_print_anychar (int c);
+extern void tty_print_string (const char *s);
+/* *INDENT-OFF* */
+extern void tty_printf (const char *s, ...) G_GNUC_PRINTF (1, 2);
+/* *INDENT-ON* */
+
+extern void tty_print_one_vline (gboolean single);
+extern void tty_print_one_hline (gboolean single);
+extern void tty_draw_hline (int y, int x, int ch, int len);
+extern void tty_draw_vline (int y, int x, int ch, int len);
+extern void tty_draw_box (int y, int x, int rows, int cols, gboolean single);
+extern void tty_draw_box_shadow (int y, int x, int rows, int cols, int shadow_color);
+extern void tty_fill_region (int y, int x, int rows, int cols, unsigned char ch);
+
+extern int tty_resize (int fd);
+extern void tty_refresh (void);
+extern void tty_change_screen_size (void);
+
+/* Clear screen */
+extern void tty_clear_screen (void);
+
+extern int mc_tty_normalize_lines_char (const char *str);
+
+extern void tty_enter_ca_mode (void);
+extern void tty_exit_ca_mode (void);
+
+/*** inline functions ****************************************************************************/
+
+#endif /* MC__TTY_H */
diff --git a/lib/tty/win.c b/lib/tty/win.c
new file mode 100644
index 0000000..808d508
--- /dev/null
+++ b/lib/tty/win.c
@@ -0,0 +1,165 @@
+/*
+   Terminal management xterm and rxvt support
+
+   Copyright (C) 1995-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Andrew Borodin <aborodin@vmail.ru>, 2009.
+
+   This file is part of the Midnight Commander.
+
+   The Midnight Commander is free software: you can redistribute it
+   and/or modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   The Midnight Commander 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file win.c
+ *  \brief Source: Terminal management xterm and rxvt support
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#else
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+#endif
+
+#include "lib/global.h"
+#include "lib/util.h"           /* is_printable() */
+#include "tty-internal.h"
+#include "tty.h"                /* tty_gotoyx, tty_print_char */
+#include "win.h"
+
+/*** global variables ****************************************************************************/
+
+char *smcup = NULL;
+char *rmcup = NULL;
+
+/*** file scope macro definitions ****************************************************************/
+
+/*** file scope type declarations ****************************************************************/
+
+/*** file scope variables ************************************************************************/
+
+static gboolean rxvt_extensions = FALSE;
+
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+/* my own weird protocol base 16 - paul */
+static int
+rxvt_getc (void)
+{
+    int r;
+    unsigned char c;
+
+    while (read (0, &c, 1) != 1);
+    if (c == '\n')
+        return -1;
+    r = (c - 'A') * 16;
+    while (read (0, &c, 1) != 1);
+    r += (c - 'A');
+    return r;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+anything_ready (void)
+{
+    fd_set fds;
+    struct timeval tv;
+
+    FD_ZERO (&fds);
+    FD_SET (0, &fds);
+    tv.tv_sec = 0;
+    tv.tv_usec = 0;
+    return select (1, &fds, 0, 0, &tv);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+void
+show_rxvt_contents (int starty, unsigned char y1, unsigned char y2)
+{
+    unsigned char *k;
+    int bytes, i, j, cols = 0;
+
+    y1 += mc_global.keybar_visible != 0 ? 1 : 0;        /* i don't knwo why we need this - paul */
+    y2 += mc_global.keybar_visible != 0 ? 1 : 0;
+    while (anything_ready ())
+        tty_lowlevel_getch ();
+
+    /* my own weird protocol base 26 - paul */
+    printf (ESC_STR "CL%c%c%c%c\n", (y1 / 26) + 'A', (y1 % 26) + 'A', (y2 / 26) + 'A',
+            (y2 % 26) + 'A');
+
+    bytes = (y2 - y1) * (COLS + 1) + 1; /* *should* be the number of bytes read */
+    j = 0;
+    k = g_malloc (bytes);
+    while (TRUE)
+    {
+        int c;
+
+        c = rxvt_getc ();
+        if (c < 0)
+            break;
+        if (j < bytes)
+            k[j++] = c;
+        for (cols = 1;; cols++)
+        {
+            c = rxvt_getc ();
+            if (c < 0)
+                break;
+            if (j < bytes)
+                k[j++] = c;
+        }
+    }
+    for (i = 0; i < j; i++)
+    {
+        if ((i % cols) == 0)
+            tty_gotoyx (starty + (i / cols), 0);
+        tty_print_char (is_printable (k[i]) ? k[i] : ' ');
+    }
+    g_free (k);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+gboolean
+look_for_rxvt_extensions (void)
+{
+    static gboolean been_called = FALSE;
+
+    if (!been_called)
+    {
+        const char *e = getenv ("RXVT_EXT");
+        rxvt_extensions = ((e != NULL) && (strcmp (e, "1.0") == 0));
+        been_called = TRUE;
+    }
+
+    if (rxvt_extensions)
+        mc_global.tty.console_flag = '\004';
+
+    return rxvt_extensions;
+}
+
+/* --------------------------------------------------------------------------------------------- */
diff --git a/lib/tty/win.h b/lib/tty/win.h
new file mode 100644
index 0000000..4c31607
--- /dev/null
+++ b/lib/tty/win.h
@@ -0,0 +1,24 @@
+/** \file win.h
+ *  \brief Header: X terminal management: xterm and rxvt
+ */
+
+#ifndef MC__WIN_H
+#define MC__WIN_H
+
+#include "lib/global.h"         /* <glib.h> */
+
+/*** typedefs(not structures) and defined constants **********************************************/
+
+/*** enums ***************************************************************************************/
+
+/*** structures declarations (and typedefs of structures)*****************************************/
+
+/*** global variables defined in .c file *********************************************************/
+
+/*** declarations of public functions ************************************************************/
+
+void show_rxvt_contents (int starty, unsigned char y1, unsigned char y2);
+gboolean look_for_rxvt_extensions (void);
+
+/*** inline functions ****************************************************************************/
+#endif /* MC_WIN_H */
diff --git a/lib/tty/x11conn.c b/lib/tty/x11conn.c
new file mode 100644
index 0000000..68e83b4
--- /dev/null
+++ b/lib/tty/x11conn.c
@@ -0,0 +1,262 @@
+/*
+   X11 support for the Midnight Commander.
+
+   Copyright (C) 2005-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Roland Illig <roland.illig@gmx.de>, 2005.
+
+   This file is part of the Midnight Commander.
+
+   The Midnight Commander is free software: you can redistribute it
+   and/or modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   The Midnight Commander 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file x11conn.c
+ *  \brief Source: X11 support
+ *  \warning This code uses setjmp() and longjmp(). Before you modify _anything_ here,
+ *  please read the relevant sections of the C standard.
+ */
+
+#include <config.h>
+
+#include <setjmp.h>
+#include <X11/Xlib.h>
+#ifdef HAVE_GMODULE
+#include <gmodule.h>
+#endif
+
+#include "lib/global.h"
+#include "x11conn.h"
+
+/*** global variables ****************************************************************************/
+
+/*** file scope macro definitions ****************************************************************/
+
+#ifndef HAVE_GMODULE
+#define func_XOpenDisplay       XOpenDisplay
+#define func_XCloseDisplay      XCloseDisplay
+#define func_XSetErrorHandler   XSetErrorHandler
+#define func_XSetIOErrorHandler XSetIOErrorHandler
+#define func_XQueryPointer      XQueryPointer
+#endif
+
+/*** file scope type declarations ****************************************************************/
+
+typedef int (*mc_XErrorHandler_callback) (Display *, XErrorEvent *);
+typedef int (*mc_XIOErrorHandler_callback) (Display *);
+
+/*** file scope variables ************************************************************************/
+
+#ifdef HAVE_GMODULE
+static Display *(*func_XOpenDisplay) (_Xconst char *);
+static int (*func_XCloseDisplay) (Display *);
+static mc_XErrorHandler_callback (*func_XSetErrorHandler) (mc_XErrorHandler_callback);
+static mc_XIOErrorHandler_callback (*func_XSetIOErrorHandler) (mc_XIOErrorHandler_callback);
+static Bool (*func_XQueryPointer) (Display *, Window, Window *, Window *,
+                                   int *, int *, int *, int *, unsigned int *);
+static GModule *x11_module;
+#endif
+
+static gboolean handlers_installed = FALSE;
+
+/* This flag is set as soon as an X11 error is reported. Usually that
+ * means that the DISPLAY is not available anymore. We do not try to
+ * reconnect, as that would violate the X11 protocol. */
+static gboolean lost_connection = FALSE;
+
+static jmp_buf x11_exception;   /* FIXME: get a better name */
+static gboolean longjmp_allowed = FALSE;
+
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+x_io_error_handler (Display * dpy)
+{
+    (void) dpy;
+
+    lost_connection = TRUE;
+    if (longjmp_allowed)
+    {
+        longjmp_allowed = FALSE;
+        longjmp (x11_exception, 1);
+    }
+    return 0;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+x_error_handler (Display * dpy, XErrorEvent * ee)
+{
+    (void) ee;
+    (void) func_XCloseDisplay (dpy);
+    return x_io_error_handler (dpy);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+install_error_handlers (void)
+{
+    if (handlers_installed)
+        return;
+
+    (void) func_XSetErrorHandler (x_error_handler);
+    (void) func_XSetIOErrorHandler (x_io_error_handler);
+    handlers_installed = TRUE;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static gboolean
+x11_available (void)
+{
+#ifdef HAVE_GMODULE
+    gchar *x11_module_fname;
+
+    if (lost_connection)
+        return FALSE;
+
+    if (x11_module != NULL)
+        return TRUE;
+
+    x11_module_fname = g_module_build_path (NULL, "X11");
+    x11_module = g_module_open (x11_module_fname, G_MODULE_BIND_LAZY);
+    if (x11_module == NULL)
+        x11_module = g_module_open ("libX11.so.6", G_MODULE_BIND_LAZY);
+
+    g_free (x11_module_fname);
+
+    if (x11_module == NULL)
+        return FALSE;
+
+    if (!g_module_symbol (x11_module, "XOpenDisplay", (void *) &func_XOpenDisplay))
+        goto cleanup;
+    if (!g_module_symbol (x11_module, "XCloseDisplay", (void *) &func_XCloseDisplay))
+        goto cleanup;
+    if (!g_module_symbol (x11_module, "XQueryPointer", (void *) &func_XQueryPointer))
+        goto cleanup;
+    if (!g_module_symbol (x11_module, "XSetErrorHandler", (void *) &func_XSetErrorHandler))
+        goto cleanup;
+    if (!g_module_symbol (x11_module, "XSetIOErrorHandler", (void *) &func_XSetIOErrorHandler))
+        goto cleanup;
+
+    install_error_handlers ();
+    return TRUE;
+
+  cleanup:
+    func_XOpenDisplay = 0;
+    func_XCloseDisplay = 0;
+    func_XQueryPointer = 0;
+    func_XSetErrorHandler = 0;
+    func_XSetIOErrorHandler = 0;
+    g_module_close (x11_module);
+    x11_module = NULL;
+    return FALSE;
+#else
+    install_error_handlers ();
+    return !(lost_connection);
+#endif
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+Display *
+mc_XOpenDisplay (const char *displayname)
+{
+    if (x11_available ())
+    {
+        if (setjmp (x11_exception) == 0)
+        {
+            Display *retval;
+
+            /* cppcheck-suppress redundantAssignment */
+            longjmp_allowed = TRUE;
+
+            retval = func_XOpenDisplay (displayname);
+
+            /* cppcheck-suppress redundantAssignment */
+            longjmp_allowed = FALSE;
+            return retval;
+        }
+    }
+    return NULL;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+int
+mc_XCloseDisplay (Display * display)
+{
+    if (x11_available ())
+    {
+        if (setjmp (x11_exception) == 0)
+        {
+            int retval;
+
+            /* cppcheck-suppress redundantAssignment */
+            longjmp_allowed = TRUE;
+
+            retval = func_XCloseDisplay (display);
+
+            /* cppcheck-suppress redundantAssignment */
+            longjmp_allowed = FALSE;
+
+            return retval;
+        }
+    }
+    return 0;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+Bool
+mc_XQueryPointer (Display * display, Window win, Window * root_return,
+                  Window * child_return, int *root_x_return, int *root_y_return,
+                  int *win_x_return, int *win_y_return, unsigned int *mask_return)
+{
+    Bool retval;
+
+    if (x11_available ())
+    {
+        if (setjmp (x11_exception) == 0)
+        {
+            /* cppcheck-suppress redundantAssignment */
+            longjmp_allowed = TRUE;
+
+            retval = func_XQueryPointer (display, win, root_return,
+                                         child_return, root_x_return, root_y_return,
+                                         win_x_return, win_y_return, mask_return);
+
+            /* cppcheck-suppress redundantAssignment */
+            longjmp_allowed = FALSE;
+
+            return retval;
+        }
+    }
+    *root_return = None;
+    *child_return = None;
+    *root_x_return = 0;
+    *root_y_return = 0;
+    *win_x_return = 0;
+    *win_y_return = 0;
+    *mask_return = 0;
+    return False;
+}
+
+/* --------------------------------------------------------------------------------------------- */
diff --git a/lib/tty/x11conn.h b/lib/tty/x11conn.h
new file mode 100644
index 0000000..fbfe15a
--- /dev/null
+++ b/lib/tty/x11conn.h
@@ -0,0 +1,40 @@
+/** \file x11conn.h
+ *  \brief Header: X11 support
+ *  \warning This code uses setjmp() and longjmp(). Before you modify _anything_ here,
+ *  please read the relevant sections of the C standard.
+ */
+
+#ifndef MC__X11CONN_H
+#define MC__X11CONN_H
+
+/*
+   This module provides support for some X11 functions.  The functions
+   are loaded dynamically if GModule is available, and statically if
+   not.  X11 session handling is somewhat robust.  If there is an X11
+   error or a connection error, all further traffic to the X server
+   will be suppressed, and the functions will return reasonable default
+   values.
+ */
+
+#include <X11/Xlib.h>
+
+/*** typedefs(not structures) and defined constants **********************************************/
+
+/*** enums ***************************************************************************************/
+
+/*** structures declarations (and typedefs of structures)*****************************************/
+
+/*** global variables defined in .c file *********************************************************/
+
+/*** declarations of public functions ************************************************************/
+
+extern Display *mc_XOpenDisplay (const char *displayname);
+extern int mc_XCloseDisplay (Display * display);
+
+extern Bool mc_XQueryPointer (Display * display, Window win, Window * root_return,
+                              Window * child_return, int *root_x_return, int *root_y_return,
+                              int *win_x_return, int *win_y_return, unsigned int *mask_return);
+
+/*** inline functions ****************************************************************************/
+
+#endif /* MC__X11CONN_H */