mdw@git.distorted.org.uk Git - sw-tools/blob - src/pres_curses.c

   1 /* -*-c-*-
   2  *
   3  * $Id: pres_curses.c,v 1.1 1999/06/02 16:53:35 mdw Exp $
   4  *
   5  * Curses-based output presentation
   6  *
   7  * (c) 1999 EBI
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of sw-tools.
  13  *
  14  * sw-tools is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * sw-tools is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with sw-tools; if not, write to the Free Software Foundation,
  26  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  27  */
  28
  29 /*----- Revision history --------------------------------------------------*
  30  *
  31  * $Log: pres_curses.c,v $
  32  * Revision 1.1  1999/06/02 16:53:35  mdw
  33  * Initial revision
  34  *
  35  */
  36
  37 /*----- Header files ------------------------------------------------------*/
  38
  39 #include "config.h"
  40 #ifdef HAVE_CURSES
  41
  42 #include <errno.h>
  43 #include <signal.h>
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <string.h>
  47
  48 #include <sys/types.h>
  49 #include <unistd.h>
  50
  51 #if defined(HAVE_NCURSES_H)
  52 #  include <ncurses.h>
  53 #elif defined(HAVE_NCURSES_NCURSES_H)
  54 #  include <ncurses/ncurses.h>
  55 #elif defined(HAVE_CURSES_H)
  56 #  include <curses.h>
  57 #else
  58 #  error "Where's your <curses.h> header?"
  59 #endif
  60 #include <term.h>
  61
  62 #include <mLib/alloc.h>
  63 #include <mLib/report.h>
  64
  65 #include "sw.h"
  66 #include "sw_arch.h"
  67 #include "pres_curses.h"
  68
  69 #ifndef SIGWINCH
  70 #  undef HAVE_WRESIZE
  71 #endif
  72
  73 /*----- Data structures ---------------------------------------------------*/
  74
  75 typedef struct cwin {
  76   struct cwin *next;
  77   WINDOW *w;
  78   int top;
  79   int height;
  80   WINDOW *s;
  81   archent *e;
  82 } cwin;
  83
  84 /*----- Static variables --------------------------------------------------*/
  85
  86 static cwin *cwins = 0;
  87 static int nwins = 0;
  88
  89 /*----- Main code ---------------------------------------------------------*/
  90
  91 /* --- @sizes@ --- *
  92  *
  93  * Arguments:   ---
  94  *
  95  * Returns:     ---
  96  *
  97  * Use:         Calculates window sizes for all the windows.  The heights are
  98  *              determined in a way which doesn't allow rounding errors to be
  99  *              an issue (although there will be up to a line's height
 100  *              difference between two windows).  No actual changing of
 101  *              curses structures is done.
 102  */
 103
 104 static void sizes(void)
 105 {
 106   cwin *c;
 107   int t = 0, h = LINES, w = nwins;
 108
 109   for (c = cwins; c; c = c->next) {
 110     int a = h / w;
 111     c->top = t;
 112     c->height = a - 1;
 113     t += a;
 114     h -= a;
 115     w--;
 116   }
 117 }
 118
 119 /* --- @sig_tstp@ --- */
 120
 121 #ifdef SIGTSTP
 122 static void sig_tstp(int s)
 123 {
 124   endwin();
 125   raise(SIGSTOP);
 126 }
 127 #endif
 128
 129 /* --- @sig_cont@ --- */
 130
 131 #ifdef SIGTSTP
 132 static void sig_cont(int s)
 133 {
 134   wrefresh(curscr);
 135 }
 136 #endif
 137
 138 /* --- @sig_winch@ --- */
 139
 140 #ifdef HAVE_WRESIZE
 141
 142 static void sig_winch(int s)
 143 {
 144   cwin *c;
 145   endwin();
 146   refresh();
 147   sizes();
 148   for (c = cwins; c; c = c->next) {
 149     mvwin(c->w, c->top, 0);
 150     wresize(c->w, c->height, COLS);
 151     mvwin(c->s, c->top + c->height, 0);
 152     wnoutrefresh(c->w);
 153     wnoutrefresh(c->s);
 154   }
 155   doupdate();
 156 }
 157
 158 #endif
 159
 160 /* --- @curses_ok@ --- */
 161
 162 int curses_ok(void)
 163 {
 164   if (!isatty(STDOUT_FILENO)) {
 165     moan("can't use curses: stdout isn't a terminal");
 166     return (0);
 167   }
 168   if (setupterm(0, STDOUT_FILENO, 0) == ERR) {
 169     moan("can't use curses: couldn't read terminfo");
 170     return (0);
 171   }
 172   if (!tigetstr("cup")) {
 173     moan("can't use curses: terminal insufficiently winning");
 174     return (0);
 175   }
 176   return (1);
 177 }
 178
 179 /* --- @curses_init@ --- */
 180
 181 int curses_init(archcons *a)
 182 {
 183   cwin **cc = &cwins, *c;
 184
 185   /* --- Allocate my window structures --- */
 186
 187   nwins = 0;
 188   for (; a; a = a->cdr) {
 189     archent *e = a->car;
 190     if (!e->r)
 191       continue;
 192     c = xmalloc(sizeof(cwin));
 193     e->pres = c;
 194     c->w = 0;
 195     c->e = e;
 196     nwins++;
 197     *cc = c;
 198     cc = &c->next;
 199   }
 200   *cc = 0;
 201
 202   /* --- Haul curses up by its naughty bits --- */
 203
 204   initscr();
 205   keypad(stdscr, TRUE);
 206   cbreak();
 207   noecho();
 208   nonl();
 209   def_prog_mode();
 210
 211   /* --- Grind through everything setting up windows --- */
 212
 213   sizes();
 214   for (c = cwins; c; c = c->next) {
 215     if ((c->w = newwin(c->height, COLS, c->top, 0)) == 0 ||
 216         (c->s = newwin(1, COLS, c->top + c->height, 0)) == 0)
 217       goto fail_0;
 218     scrollok(c->w, TRUE);
 219     leaveok(c->w, TRUE);
 220     leaveok(c->s, TRUE);
 221     wbkgdset(c->s, A_STANDOUT);
 222     werase(c->s);
 223     mvwprintw(c->s, 0, 0, "  %s  [running]\n", c->e->arch);
 224     wnoutrefresh(c->w);
 225     wnoutrefresh(c->s);
 226   }
 227   doupdate();
 228
 229 #ifdef HAVE_WRESIZE
 230   signal(SIGWINCH, sig_winch);
 231 #endif
 232 #ifdef SIGTSTP
 233   signal(SIGTSTP, sig_tstp);
 234   signal(SIGCONT, sig_cont);
 235 #endif
 236   return (0);
 237
 238 fail_0:
 239   c = cwins;
 240   while (c) {
 241     cwin *cc = c->next;
 242     if (c->w)
 243       delwin(c->w);
 244     if (c->s)
 245       delwin(c->s);
 246     free(c);
 247     c = cc;
 248   }
 249   endwin();
 250   return (-1);
 251 }
 252
 253 /* --- @curses_output@ --- */
 254
 255 void curses_output(archent *e, const char *p, size_t sz)
 256 {
 257   cwin *c = e->pres;
 258   while (sz) {
 259     waddch(c->w, *p);
 260     p++;
 261     sz--;
 262   }
 263   wrefresh(c->w);
 264 }
 265
 266 /* --- @curses_close@ --- */
 267
 268 void curses_close(archent *e, int ok)
 269 {
 270   cwin *c = e->pres;
 271   mvwprintw(c->s, 0, 0, "  %s [%s]\n", e->arch, ok ? "finished" : "failed");
 272   wrefresh(c->s);
 273 }
 274
 275 /* --- @curses_done@ --- */
 276
 277 void curses_done(archcons *a)
 278 {
 279   if (opt_flags & optFlag_beep) {
 280     beep();
 281     doupdate();
 282   }
 283   wgetch(cwins->w);
 284   cwins = 0;
 285   for (; a; a = a->cdr) {
 286     archent *e = a->car;
 287     cwin *c = e->pres;
 288     delwin(c->w);
 289     delwin(c->s);
 290     free(c);
 291   }
 292   curses_abort(0);
 293 }
 294
 295 /* --- @curses_abort@ --- */
 296
 297 void curses_abort(archcons *a)
 298 {
 299 #ifdef HAVE_WRESIZE
 300   signal(SIGWINCH, SIG_DFL);
 301 #endif
 302 #ifdef SIGTSTP
 303   signal(SIGTSTP, SIG_DFL);
 304   signal(SIGCONT, SIG_DFL);
 305 #endif
 306   endwin();
 307 }
 308
 309 /*----- That's all, folks -------------------------------------------------*/
 310
 311 #else
 312   int pres_curses__built = 1;
 313 #endif