src/rxvt.c

   1 /* rxvt.c - gives output lines on rxvt with a special rxvt patch
   2    Copyright (C) 1997 Paul Sheer
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  17  */
  18
  19 #include <config.h>
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include <sys/types.h>
  26 #include <unistd.h>
  27
  28 #include "global.h"
  29 #include "tty.h"        /* move, addch */
  30 #include "cons.saver.h"
  31
  32 static int rxvt_extensions = 0;
  33
  34 int look_for_rxvt_extensions (void)
  35 {
  36     static int been_called = 0;
  37     const char *e;
  38     if (!been_called) {
  39         rxvt_extensions = 0;
  40         e = getenv ("RXVT_EXT");
  41         if (e)
  42             if (!strcmp (e, "1.0"))
  43                 rxvt_extensions = 1;
  44         been_called = 1;
  45     }
  46     if (rxvt_extensions)
  47         console_flag = 4;
  48     return rxvt_extensions;
  49 }
  50
  51 /* my own wierd protocol base 16 - paul */
  52 static int rxvt_getc (void)
  53 {
  54     int r;
  55     unsigned char c;
  56     while (read (0, &c, 1) != 1);
  57     if (c == '\n')
  58         return -1;
  59     r = (c - 'A') * 16;
  60     while (read (0, &c, 1) != 1);
  61     r += (c - 'A');
  62     return r;
  63 }
  64
  65 extern int keybar_visible;
  66
  67 static int anything_ready (void)
  68 {
  69     fd_set fds;
  70     struct timeval tv;
  71
  72     FD_ZERO (&fds);
  73     FD_SET (0, &fds);
  74     tv.tv_sec = 0;
  75     tv.tv_usec = 0;
  76     return select (1, &fds, 0, 0, &tv);
  77 }
  78
  79 void show_rxvt_contents (int starty, unsigned char y1, unsigned char y2)
  80 {
  81     unsigned char *k;
  82     int bytes, i, j, cols = 0;
  83     y1 += (keybar_visible != 0);        /* i don't knwo why we need this - paul */
  84     y2 += (keybar_visible != 0);
  85     while (anything_ready ())
  86         getch ();
  87
  88 /* my own wierd protocol base 26 - paul */
  89     printf ("\033CL%c%c%c%c\n",
  90             (y1 / 26) + 'A', (y1 % 26) + 'A',
  91             (y2 / 26) + 'A', (y2 % 26) + 'A');
  92
  93     bytes = (y2 - y1) * (COLS + 1) + 1;         /* *should* be the number of bytes read */
  94     j = 0;
  95     k = g_malloc (bytes);
  96     for (;;) {
  97         int c;
  98         c = rxvt_getc ();
  99         if (c < 0)
 100             break;
 101         if (j < bytes)
 102             k[j++] = c;
 103         for (cols = 1;;cols++) {
 104             c = rxvt_getc ();
 105             if (c < 0)
 106                 break;
 107             if (j < bytes)
 108                 k[j++] = c;
 109         }
 110     }
 111     for (i = 0; i < j; i++) {
 112         if ((i % cols) == 0)
 113             move (starty + (i / cols), 0);
 114         addch (is_printable (k[i]) ? k[i] : ' ');
 115     }
 116     g_free (k);
 117 }
 118