tty.c 9.3 KB

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  1. /*
  2. Interface to the terminal controlling library.
  3. Copyright (C) 2005, 2006, 2007, 2009, 2011
  4. The Free Software Foundation, Inc.
  5. Written by:
  6. Roland Illig <roland.illig@gmx.de>, 2005.
  7. Andrew Borodin <aborodin@vmail.ru>, 2009.
  8. This file is part of the Midnight Commander.
  9. The Midnight Commander is free software: you can redistribute it
  10. and/or modify it under the terms of the GNU General Public License as
  11. published by the Free Software Foundation, either version 3 of the License,
  12. or (at your option) any later version.
  13. The Midnight Commander is distributed in the hope that it will be useful,
  14. but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16. GNU General Public License for more details.
  17. You should have received a copy of the GNU General Public License
  18. along with this program. If not, see <http://www.gnu.org/licenses/>.
  19. */
  20. /** \file tty.c
  21. * \brief Source: %interface to the terminal controlling library
  22. */
  23. #include <config.h>
  24. #include <signal.h>
  25. #include <stdarg.h>
  26. #include <stdlib.h>
  27. #include <string.h> /* memset() */
  28. #include <unistd.h> /* exit() */
  29. #ifdef HAVE_SYS_IOCTL_H
  30. #include <sys/ioctl.h>
  31. #endif
  32. #include "lib/global.h"
  33. #include "lib/strutil.h"
  34. #include "tty.h"
  35. #include "tty-internal.h"
  36. #include "mouse.h" /* use_mouse_p */
  37. #include "win.h"
  38. /*** global variables ****************************************************************************/
  39. /* If true program softkeys (HP terminals only) on startup and after every
  40. command ran in the subshell to the description found in the termcap/terminfo
  41. database */
  42. int reset_hp_softkeys = 0;
  43. int mc_tty_frm[MC_TTY_FRM_MAX];
  44. /*** file scope macro definitions ****************************************************************/
  45. /*** file scope type declarations ****************************************************************/
  46. /*** file scope variables ************************************************************************/
  47. static SIG_ATOMIC_VOLATILE_T got_interrupt = 0;
  48. /*** file scope functions ************************************************************************/
  49. /* --------------------------------------------------------------------------------------------- */
  50. static void
  51. sigintr_handler (int signo)
  52. {
  53. (void) &signo;
  54. got_interrupt = 1;
  55. }
  56. /* --------------------------------------------------------------------------------------------- */
  57. /*** public functions ****************************************************************************/
  58. /* --------------------------------------------------------------------------------------------- */
  59. /**
  60. * Check terminal type. If $TERM is not set or value is empty, mc finishes with EXIT_FAILURE.
  61. *
  62. * @param force_xterm Set forced the XTerm type
  63. *
  64. * @return true if @param force_xterm is true or value of $TERM is one of term*, konsole*
  65. * rxvt*, Eterm or dtterm
  66. */
  67. gboolean
  68. tty_check_term (gboolean force_xterm)
  69. {
  70. const char *termvalue;
  71. const char *xdisplay;
  72. termvalue = getenv ("TERM");
  73. if (termvalue == NULL || *termvalue == '\0')
  74. {
  75. fputs (_("The TERM environment variable is unset!\n"), stderr);
  76. exit (EXIT_FAILURE);
  77. }
  78. xdisplay = getenv ("DISPLAY");
  79. if (xdisplay != NULL && *xdisplay == '\0')
  80. xdisplay = NULL;
  81. return force_xterm || strncmp (termvalue, "xterm", 5) == 0
  82. || strncmp (termvalue, "konsole", 7) == 0
  83. || strncmp (termvalue, "rxvt", 4) == 0
  84. || strcmp (termvalue, "Eterm") == 0
  85. || strcmp (termvalue, "dtterm") == 0
  86. || (strncmp (termvalue, "screen", 6) == 0 && xdisplay != NULL);
  87. }
  88. /* --------------------------------------------------------------------------------------------- */
  89. extern void
  90. tty_start_interrupt_key (void)
  91. {
  92. struct sigaction act;
  93. memset (&act, 0, sizeof (act));
  94. act.sa_handler = sigintr_handler;
  95. sigemptyset (&act.sa_mask);
  96. #ifdef SA_RESTART
  97. act.sa_flags = SA_RESTART;
  98. #endif /* SA_RESTART */
  99. sigaction (SIGINT, &act, NULL);
  100. }
  101. /* --------------------------------------------------------------------------------------------- */
  102. extern void
  103. tty_enable_interrupt_key (void)
  104. {
  105. struct sigaction act;
  106. memset (&act, 0, sizeof (act));
  107. act.sa_handler = sigintr_handler;
  108. sigemptyset (&act.sa_mask);
  109. sigaction (SIGINT, &act, NULL);
  110. got_interrupt = 0;
  111. }
  112. /* --------------------------------------------------------------------------------------------- */
  113. extern void
  114. tty_disable_interrupt_key (void)
  115. {
  116. struct sigaction act;
  117. memset (&act, 0, sizeof (act));
  118. act.sa_handler = SIG_IGN;
  119. sigemptyset (&act.sa_mask);
  120. sigaction (SIGINT, &act, NULL);
  121. }
  122. /* --------------------------------------------------------------------------------------------- */
  123. extern gboolean
  124. tty_got_interrupt (void)
  125. {
  126. gboolean rv;
  127. rv = (got_interrupt != 0);
  128. got_interrupt = 0;
  129. return rv;
  130. }
  131. /* --------------------------------------------------------------------------------------------- */
  132. void
  133. tty_print_one_hline (gboolean single)
  134. {
  135. tty_print_alt_char (ACS_HLINE, single);
  136. }
  137. /* --------------------------------------------------------------------------------------------- */
  138. void
  139. tty_print_one_vline (gboolean single)
  140. {
  141. tty_print_alt_char (ACS_VLINE, single);
  142. }
  143. /* --------------------------------------------------------------------------------------------- */
  144. void
  145. tty_draw_box (int y, int x, int ys, int xs, gboolean single)
  146. {
  147. int y2, x2;
  148. if (ys <= 0 || xs <= 0)
  149. return;
  150. ys--;
  151. xs--;
  152. y2 = y + ys;
  153. x2 = x + xs;
  154. tty_draw_vline (y, x, mc_tty_frm[single ? MC_TTY_FRM_VERT : MC_TTY_FRM_DVERT], ys);
  155. tty_draw_vline (y, x2, mc_tty_frm[single ? MC_TTY_FRM_VERT : MC_TTY_FRM_DVERT], ys);
  156. tty_draw_hline (y, x, mc_tty_frm[single ? MC_TTY_FRM_HORIZ : MC_TTY_FRM_DHORIZ], xs);
  157. tty_draw_hline (y2, x, mc_tty_frm[single ? MC_TTY_FRM_HORIZ : MC_TTY_FRM_DHORIZ], xs);
  158. tty_gotoyx (y, x);
  159. tty_print_alt_char (ACS_ULCORNER, single);
  160. tty_gotoyx (y2, x);
  161. tty_print_alt_char (ACS_LLCORNER, single);
  162. tty_gotoyx (y, x2);
  163. tty_print_alt_char (ACS_URCORNER, single);
  164. tty_gotoyx (y2, x2);
  165. tty_print_alt_char (ACS_LRCORNER, single);
  166. }
  167. /* --------------------------------------------------------------------------------------------- */
  168. char *
  169. mc_tty_normalize_from_utf8 (const char *str)
  170. {
  171. GIConv conv;
  172. GString *buffer;
  173. const char *_system_codepage = str_detect_termencoding ();
  174. if (str_isutf8 (_system_codepage))
  175. return g_strdup (str);
  176. conv = g_iconv_open (_system_codepage, "UTF-8");
  177. if (conv == INVALID_CONV)
  178. return g_strdup (str);
  179. buffer = g_string_new ("");
  180. if (str_convert (conv, str, buffer) == ESTR_FAILURE)
  181. {
  182. g_string_free (buffer, TRUE);
  183. str_close_conv (conv);
  184. return g_strdup (str);
  185. }
  186. str_close_conv (conv);
  187. return g_string_free (buffer, FALSE);
  188. }
  189. /* --------------------------------------------------------------------------------------------- */
  190. /** Resize given terminal using TIOCSWINSZ, return ioctl() result */
  191. int
  192. tty_resize (int fd)
  193. {
  194. #if defined TIOCSWINSZ
  195. struct winsize tty_size;
  196. tty_size.ws_row = LINES;
  197. tty_size.ws_col = COLS;
  198. tty_size.ws_xpixel = tty_size.ws_ypixel = 0;
  199. return ioctl (fd, TIOCSWINSZ, &tty_size);
  200. #else
  201. return 0;
  202. #endif
  203. }
  204. /* --------------------------------------------------------------------------------------------- */
  205. void
  206. tty_init_xterm_support (gboolean is_xterm)
  207. {
  208. const char *termvalue;
  209. termvalue = getenv ("TERM");
  210. /* Check mouse and ca capabilities */
  211. /* terminfo/termcap structures have been already initialized,
  212. in slang_init() or/and init_curses() */
  213. /* Check terminfo at first, then check termcap */
  214. xmouse_seq = tty_tgetstr ("kmous");
  215. if (xmouse_seq == NULL)
  216. xmouse_seq = tty_tgetstr ("Km");
  217. smcup = tty_tgetstr ("smcup");
  218. if (smcup == NULL)
  219. smcup = tty_tgetstr ("ti");
  220. rmcup = tty_tgetstr ("rmcup");
  221. if (rmcup == NULL)
  222. rmcup = tty_tgetstr ("te");
  223. if (strcmp (termvalue, "cygwin") == 0)
  224. {
  225. is_xterm = TRUE;
  226. use_mouse_p = MOUSE_DISABLED;
  227. }
  228. if (is_xterm)
  229. {
  230. /* Default to the standard xterm sequence */
  231. if (xmouse_seq == NULL)
  232. xmouse_seq = ESC_STR "[M";
  233. /* Enable mouse unless explicitly disabled by --nomouse */
  234. if (use_mouse_p != MOUSE_DISABLED)
  235. {
  236. if (mc_global.tty.old_mouse)
  237. use_mouse_p = MOUSE_XTERM_NORMAL_TRACKING;
  238. else
  239. {
  240. /* FIXME: this dirty hack to set supported type of tracking the mouse */
  241. const char *color_term = getenv ("COLORTERM");
  242. if (strncmp (termvalue, "rxvt", 4) == 0 ||
  243. (color_term != NULL && strncmp (color_term, "rxvt", 4) == 0) ||
  244. strcmp (termvalue, "Eterm") == 0)
  245. use_mouse_p = MOUSE_XTERM_NORMAL_TRACKING;
  246. else
  247. use_mouse_p = MOUSE_XTERM_BUTTON_EVENT_TRACKING;
  248. }
  249. }
  250. }
  251. /* No termcap for SGR extended mouse (yet), hardcode it for now */
  252. if (xmouse_seq != NULL)
  253. xmouse_extended_seq = ESC_STR "[<";
  254. }
  255. /* --------------------------------------------------------------------------------------------- */