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-rw-r--r--lib/tty/color-ncurses.c251
1 files changed, 251 insertions, 0 deletions
diff --git a/lib/tty/color-ncurses.c b/lib/tty/color-ncurses.c
new file mode 100644
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--- /dev/null
+++ b/lib/tty/color-ncurses.c
@@ -0,0 +1,251 @@
+/*
+ Color setup for NCurses screen library
+
+ Copyright (C) 1994-2023
+ 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 ****************************************************************/
+
+/*** forward declarations (file scope functions) *************************************************/
+
+/*** 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;
+}
+
+/* --------------------------------------------------------------------------------------------- */
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