tty.c 8.8 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 <unistd.h> /* exit() */
  28. #ifdef HAVE_SYS_IOCTL_H
  29. #include <sys/ioctl.h>
  30. #endif
  31. #include "lib/global.h"
  32. #include "lib/strutil.h"
  33. #include "tty.h"
  34. #include "tty-internal.h"
  35. #include "mouse.h" /* use_mouse_p */
  36. #include "win.h"
  37. /*** global variables ****************************************************************************/
  38. /* If true program softkeys (HP terminals only) on startup and after every
  39. command ran in the subshell to the description found in the termcap/terminfo
  40. database */
  41. int reset_hp_softkeys = 0;
  42. int mc_tty_frm[MC_TTY_FRM_MAX];
  43. /*** file scope macro definitions ****************************************************************/
  44. /*** file scope type declarations ****************************************************************/
  45. /*** file scope variables ************************************************************************/
  46. static SIG_ATOMIC_VOLATILE_T got_interrupt = 0;
  47. /*** file scope functions ************************************************************************/
  48. /* --------------------------------------------------------------------------------------------- */
  49. static void
  50. sigintr_handler (int signo)
  51. {
  52. (void) &signo;
  53. got_interrupt = 1;
  54. }
  55. /* --------------------------------------------------------------------------------------------- */
  56. /*** public functions ****************************************************************************/
  57. /* --------------------------------------------------------------------------------------------- */
  58. /**
  59. * Check terminal type. If $TERM is not set or value is empty, mc finishes with EXIT_FAILURE.
  60. *
  61. * @param force_xterm Set forced the XTerm type
  62. *
  63. * @return true if @param force_xterm is true or value of $TERM is one of term*, konsole*
  64. * rxvt*, Eterm or dtterm
  65. */
  66. gboolean
  67. tty_check_term (gboolean force_xterm)
  68. {
  69. const char *termvalue;
  70. termvalue = getenv ("TERM");
  71. if (termvalue == NULL || *termvalue == '\0')
  72. {
  73. fputs (_("The TERM environment variable is unset!\n"), stderr);
  74. exit (EXIT_FAILURE);
  75. }
  76. return force_xterm || strncmp (termvalue, "xterm", 5) == 0
  77. || strncmp (termvalue, "konsole", 7) == 0
  78. || strncmp (termvalue, "rxvt", 4) == 0
  79. || strcmp (termvalue, "Eterm") == 0 || strcmp (termvalue, "dtterm") == 0;
  80. }
  81. /* --------------------------------------------------------------------------------------------- */
  82. extern void
  83. tty_start_interrupt_key (void)
  84. {
  85. struct sigaction act;
  86. act.sa_handler = sigintr_handler;
  87. sigemptyset (&act.sa_mask);
  88. act.sa_flags = SA_RESTART;
  89. sigaction (SIGINT, &act, NULL);
  90. }
  91. /* --------------------------------------------------------------------------------------------- */
  92. extern void
  93. tty_enable_interrupt_key (void)
  94. {
  95. struct sigaction act;
  96. act.sa_handler = sigintr_handler;
  97. sigemptyset (&act.sa_mask);
  98. act.sa_flags = 0;
  99. sigaction (SIGINT, &act, NULL);
  100. got_interrupt = 0;
  101. }
  102. /* --------------------------------------------------------------------------------------------- */
  103. extern void
  104. tty_disable_interrupt_key (void)
  105. {
  106. struct sigaction act;
  107. act.sa_handler = SIG_IGN;
  108. sigemptyset (&act.sa_mask);
  109. act.sa_flags = 0;
  110. sigaction (SIGINT, &act, NULL);
  111. }
  112. /* --------------------------------------------------------------------------------------------- */
  113. extern gboolean
  114. tty_got_interrupt (void)
  115. {
  116. gboolean rv;
  117. rv = (got_interrupt != 0);
  118. got_interrupt = 0;
  119. return rv;
  120. }
  121. /* --------------------------------------------------------------------------------------------- */
  122. void
  123. tty_print_one_hline (gboolean single)
  124. {
  125. tty_print_alt_char (ACS_HLINE, single);
  126. }
  127. /* --------------------------------------------------------------------------------------------- */
  128. void
  129. tty_print_one_vline (gboolean single)
  130. {
  131. tty_print_alt_char (ACS_VLINE, single);
  132. }
  133. /* --------------------------------------------------------------------------------------------- */
  134. void
  135. tty_draw_box (int y, int x, int ys, int xs, gboolean single)
  136. {
  137. int y2, x2;
  138. if (ys <= 0 || xs <= 0)
  139. return;
  140. ys--;
  141. xs--;
  142. y2 = y + ys;
  143. x2 = x + xs;
  144. tty_draw_vline (y, x, mc_tty_frm[single ? MC_TTY_FRM_VERT : MC_TTY_FRM_DVERT], ys);
  145. tty_draw_vline (y, x2, mc_tty_frm[single ? MC_TTY_FRM_VERT : MC_TTY_FRM_DVERT], ys);
  146. tty_draw_hline (y, x, mc_tty_frm[single ? MC_TTY_FRM_HORIZ : MC_TTY_FRM_DHORIZ], xs);
  147. tty_draw_hline (y2, x, mc_tty_frm[single ? MC_TTY_FRM_HORIZ : MC_TTY_FRM_DHORIZ], xs);
  148. tty_gotoyx (y, x);
  149. tty_print_alt_char (ACS_ULCORNER, single);
  150. tty_gotoyx (y2, x);
  151. tty_print_alt_char (ACS_LLCORNER, single);
  152. tty_gotoyx (y, x2);
  153. tty_print_alt_char (ACS_URCORNER, single);
  154. tty_gotoyx (y2, x2);
  155. tty_print_alt_char (ACS_LRCORNER, single);
  156. }
  157. /* --------------------------------------------------------------------------------------------- */
  158. char *
  159. mc_tty_normalize_from_utf8 (const char *str)
  160. {
  161. GIConv conv;
  162. GString *buffer;
  163. const char *_system_codepage = str_detect_termencoding ();
  164. if (str_isutf8 (_system_codepage))
  165. return g_strdup (str);
  166. conv = g_iconv_open (_system_codepage, "UTF-8");
  167. if (conv == INVALID_CONV)
  168. return g_strdup (str);
  169. buffer = g_string_new ("");
  170. if (str_convert (conv, str, buffer) == ESTR_FAILURE)
  171. {
  172. g_string_free (buffer, TRUE);
  173. str_close_conv (conv);
  174. return g_strdup (str);
  175. }
  176. str_close_conv (conv);
  177. return g_string_free (buffer, FALSE);
  178. }
  179. /* --------------------------------------------------------------------------------------------- */
  180. /** Resize given terminal using TIOCSWINSZ, return ioctl() result */
  181. int
  182. tty_resize (int fd)
  183. {
  184. #if defined TIOCSWINSZ
  185. struct winsize tty_size;
  186. tty_size.ws_row = LINES;
  187. tty_size.ws_col = COLS;
  188. tty_size.ws_xpixel = tty_size.ws_ypixel = 0;
  189. return ioctl (fd, TIOCSWINSZ, &tty_size);
  190. #else
  191. return 0;
  192. #endif
  193. }
  194. /* --------------------------------------------------------------------------------------------- */
  195. void
  196. tty_init_xterm_support (gboolean is_xterm)
  197. {
  198. const char *termvalue;
  199. termvalue = getenv ("TERM");
  200. /* Check mouse and ca capabilities */
  201. /* terminfo/termcap structures have been already initialized,
  202. in slang_init() or/and init_curses() */
  203. /* Check terminfo at first, then check termcap */
  204. xmouse_seq = tty_tgetstr ("kmous");
  205. if (xmouse_seq == NULL)
  206. xmouse_seq = tty_tgetstr ("Km");
  207. smcup = tty_tgetstr ("smcup");
  208. if (smcup == NULL)
  209. smcup = tty_tgetstr ("ti");
  210. rmcup = tty_tgetstr ("rmcup");
  211. if (rmcup == NULL)
  212. rmcup = tty_tgetstr ("te");
  213. if (strcmp (termvalue, "cygwin") == 0)
  214. {
  215. is_xterm = TRUE;
  216. use_mouse_p = MOUSE_DISABLED;
  217. }
  218. if (is_xterm)
  219. {
  220. /* Default to the standard xterm sequence */
  221. if (xmouse_seq == NULL)
  222. xmouse_seq = ESC_STR "[M";
  223. /* Enable mouse unless explicitly disabled by --nomouse */
  224. if (use_mouse_p != MOUSE_DISABLED)
  225. {
  226. if (mc_global.tty.old_mouse)
  227. use_mouse_p = MOUSE_XTERM_NORMAL_TRACKING;
  228. else
  229. {
  230. /* FIXME: this dirty hack to set supported type of tracking the mouse */
  231. const char *color_term = getenv ("COLORTERM");
  232. if (strncmp (termvalue, "rxvt", 4) == 0 ||
  233. (color_term != NULL && strncmp (color_term, "rxvt", 4) == 0) ||
  234. strcmp (termvalue, "Eterm") == 0)
  235. use_mouse_p = MOUSE_XTERM_NORMAL_TRACKING;
  236. else
  237. use_mouse_p = MOUSE_XTERM_BUTTON_EVENT_TRACKING;
  238. }
  239. }
  240. }
  241. }
  242. /* --------------------------------------------------------------------------------------------- */