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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17  */
  18
  19 #include <config.h>
  20 #include <stdio.h>      /* read, printf */
  21 #include <sys/types.h>
  22 #include <string.h>
  23 #ifdef HAVE_UNISTD_H
  24 #   include <unistd.h>
  25 #endif
  26
  27 #include "global.h"
  28 #include "tty.h"        /* move, addch */
  29 #include "cons.saver.h"
  30
  31 static int rxvt_extensions = 0;
  32
  33 int look_for_rxvt_extensions (void)
  34 {
  35     static int been_called = 0;
  36     char *e;
  37     if (!been_called) {
  38         rxvt_extensions = 0;
  39         e = getenv ("RXVT_EXT");
  40         if (e)
  41             if (!strcmp (e, "1.0"))
  42                 rxvt_extensions = 1;
  43         been_called = 1;
  44     }
  45     if (rxvt_extensions)
  46         console_flag = 4;
  47     return rxvt_extensions;
  48 }
  49
  50 /* my own wierd protocol base 16 - paul */
  51 static int rxvt_getc (void)
  52 {
  53     int r;
  54     unsigned char c;
  55     while (read (0, &c, 1) != 1);
  56     if (c == '\n')
  57         return -1;
  58     r = (c - 'A') * 16;
  59     while (read (0, &c, 1) != 1);
  60     r += (c - 'A');
  61     return r;
  62 }
  63
  64 extern int keybar_visible;
  65
  66 static int anything_ready (void)
  67 {
  68     fd_set fds;
  69     struct timeval tv;
  70
  71     FD_ZERO (&fds);
  72     FD_SET (0, &fds);
  73     tv.tv_sec = 0;
  74     tv.tv_usec = 0;
  75     return select (1, &fds, 0, 0, &tv);
  76 }
  77
  78 void show_rxvt_contents (int starty, unsigned char y1, unsigned char y2)
  79 {
  80     unsigned char *k;
  81     int bytes, i, j, cols = 0;
  82     y1 += (keybar_visible != 0);        /* i don't knwo why we need this - paul */
  83     y2 += (keybar_visible != 0);
  84     while (anything_ready ())
  85         getch ();
  86
  87 /* my own wierd protocol base 26 - paul */
  88     printf ("\033CL%c%c%c%c\n",
  89             (y1 / 26) + 'A', (y1 % 26) + 'A',
  90             (y2 / 26) + 'A', (y2 % 26) + 'A');
  91
  92     bytes = (y2 - y1) * (COLS + 1) + 1;         /* *should* be the number of bytes read */
  93     j = 0;
  94     k = g_malloc (bytes);
  95     for (;;) {
  96         int c;
  97         c = rxvt_getc ();
  98         if (c < 0)
  99             break;
 100         if (j < bytes)
 101             k[j++] = c;
 102         for (cols = 1;;cols++) {
 103             c = rxvt_getc ();
 104             if (c < 0)
 105                 break;
 106             if (j < bytes)
 107                 k[j++] = c;
 108         }
 109     }
 110     for (i = 0; i < j; i++) {
 111         if ((i % cols) == 0)
 112             move (starty + (i / cols), 0);
 113         addch (is_printable (k[i]) ? k[i] : ' ');
 114     }
 115     g_free (k);
 116 }
 117