mdw@git.distorted.org.uk Git - sgt/tweak/blob - slang.c

   1 #include "tweak.h"
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <ctype.h>
   7 #include <assert.h>
   8
   9 #if defined(unix) && !defined(GO32)
  10 #include <signal.h>
  11 #include <sys/ioctl.h>
  12 #endif
  13
  14 #include <slang.h>
  15
  16 #if defined(unix) && !defined(GO32)
  17 static int sigwinch (int sigtype)
  18 {
  19     extern void schedule_update(void);
  20     schedule_update();
  21     signal (SIGWINCH, (void *) sigwinch);
  22     return 0;
  23 }
  24 #endif
  25
  26 int display_rows, display_cols;
  27
  28 void display_beep(void)
  29 {
  30     SLtt_beep();
  31 }
  32
  33 static void get_screen_size (void) {
  34     int r = 0, c = 0;
  35
  36 #ifdef TIOCGWINSZ
  37     struct winsize wind_struct;
  38
  39     if ((ioctl(1,TIOCGWINSZ,&wind_struct) == 0)
  40         || (ioctl(0, TIOCGWINSZ, &wind_struct) == 0)
  41         || (ioctl(2, TIOCGWINSZ, &wind_struct) == 0)) {
  42         c = (int) wind_struct.ws_col;
  43         r = (int) wind_struct.ws_row;
  44     }
  45 #elif defined(MSDOS)
  46     union REGS regs;
  47
  48     regs.h.ah = 0x0F;
  49     int86 (0x10, &regs, &regs);
  50     c = regs.h.ah;
  51
  52     regs.x.ax = 0x1130, regs.h.bh = 0;
  53     int86 (0x10, &regs, &regs);
  54     r = regs.h.dl + 1;
  55 #endif
  56
  57     if ((r <= 0) || (r > 200)) r = 24;
  58     if ((c <= 0) || (c > 250)) c = 80;
  59     display_rows = SLtt_Screen_Rows = r;
  60     display_cols = SLtt_Screen_Cols = c;
  61 }
  62
  63 void display_setup(void)
  64 {
  65     SLtt_get_terminfo();
  66
  67     if (SLang_init_tty (ABORT, 1, 0) == -1) {
  68         fprintf(stderr, "tweak: SLang_init_tty: returned error code\n");
  69         exit (1);
  70     }
  71     SLang_set_abort_signal (NULL);
  72     SLtt_Use_Ansi_Colors = TRUE;
  73
  74     get_screen_size ();
  75     if (SLsmg_init_smg () < 0) {
  76         fprintf(stderr, "tweak: SLsmg_init_smg: returned error code\n");
  77         SLang_reset_tty ();
  78         exit (1);
  79     }
  80
  81 #if defined(unix) && !defined(GO32)
  82     signal (SIGWINCH, (void *) sigwinch);
  83 #endif
  84 }
  85
  86 void display_cleanup(void)
  87 {
  88     SLsmg_reset_smg ();
  89     SLang_reset_tty ();
  90 }
  91
  92 void display_moveto(int y, int x)
  93 {
  94     SLsmg_gotorc(y, x);
  95 }
  96
  97 void display_refresh(void)
  98 {
  99     SLsmg_refresh();
 100 }
 101
 102 void display_write_str(char *str)
 103 {
 104     SLsmg_write_nchars(str, strlen(str));
 105 }
 106
 107 void display_write_chars(char *str, int len)
 108 {
 109     SLsmg_write_nchars(str, len);
 110 }
 111
 112 void display_define_colour(int colour, int fg, int bg, int reverse)
 113 {
 114     static char *colours[16] = {
 115         "black", "red", "green", "brown",
 116         "blue", "magenta", "cyan", "lightgray",
 117         "gray", "brightred", "brightgreen", "yellow",
 118         "brightblue", "brightmagenta", "brightcyan", "white",
 119     };
 120     char cname[40];
 121
 122     if (fg < 0 && bg < 0) {
 123         /* FIXME: not sure how to support terminal default fg+bg */
 124         fg = 7;
 125         bg = 0;
 126     }
 127
 128     sprintf(cname, "colour%d", colour);
 129
 130     SLtt_set_color(colour, cname, colours[fg], colours[bg]);
 131 }
 132
 133 void display_set_colour(int colour)
 134 {
 135     SLsmg_set_color(colour);
 136 }
 137
 138 void display_clear_to_eol(void)
 139 {
 140     SLsmg_erase_eol();
 141 }
 142
 143 int display_getkey(void)
 144 {
 145     return SLang_getkey();
 146 }
 147
 148 int display_input_to_flush(void)
 149 {
 150     return SLang_input_pending(0);
 151 }
 152
 153 void display_post_error(void)
 154 {
 155     SLKeyBoard_Quit = 0;
 156     SLang_Error = 0;
 157 }
 158
 159 void display_recheck_size(void)
 160 {
 161     SLsmg_reset_smg ();
 162     get_screen_size ();
 163     SLsmg_init_smg ();
 164 }