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-rw-r--r--lib/tty/tty-ncurses.c772
1 files changed, 772 insertions, 0 deletions
diff --git a/lib/tty/tty-ncurses.c b/lib/tty/tty-ncurses.c
new file mode 100644
index 0000000..08f663d
--- /dev/null
+++ b/lib/tty/tty-ncurses.c
@@ -0,0 +1,772 @@
+/*
+ Interface to the terminal controlling library.
+ Ncurses wrapper.
+
+ Copyright (C) 2005-2023
+ 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 ****************************************************************/
+
+/*** forward declarations (file scope functions) *************************************************/
+
+/*** 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: unneeded? */
+ 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 ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
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