gui.c

   1 /*
   2  * Copyright (C) 1998-2014 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file gui.c Curses-based interface for paraslash. */
   8
   9 #include <regex.h>
  10 #include <signal.h>
  11 #include <sys/types.h>
  12 #include <curses.h>
  13 #include <locale.h>
  14 #include <sys/time.h>
  15
  16 #include "gui.cmdline.h"
  17 #include "para.h"
  18 #include "gui.h"
  19 #include "string.h"
  20 #include "ringbuffer.h"
  21 #include "fd.h"
  22 #include "error.h"
  23 #include "list.h"
  24 #include "sched.h"
  25 #include "signal.h"
  26 #include "ggo.h"
  27 #include "version.h"
  28
  29 /** define the array of error lists needed by para_gui */
  30 INIT_GUI_ERRLISTS;
  31 static char *stat_content[NUM_STAT_ITEMS];
  32
  33 static int signal_pipe;
  34
  35 static struct gui_window {
  36         WINDOW *win;
  37 } top, bot, sb, in, sep;
  38
  39 #define RINGBUFFER_SIZE 512
  40 struct rb_entry {
  41         char *msg;
  42         size_t len;
  43         int color;
  44 };
  45 static struct ringbuffer *bot_win_rb;
  46
  47 static unsigned scroll_position;
  48
  49 static pid_t cmd_pid;
  50
  51 static int command_fds[2] = {-1, -1};
  52 static int stat_pipe = -1;
  53 static struct gui_args_info conf;
  54 static int loglevel;
  55
  56 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
  57
  58
  59 /**
  60  * Codes for various colors.
  61  *
  62  * Each status item has its own color pair. The ones defined here start at a
  63  * higher number so that they do not overlap with these.
  64  */
  65 enum gui_color_pair {
  66         COLOR_STATUSBAR = NUM_STAT_ITEMS + 1,
  67         COLOR_COMMAND,
  68         COLOR_OUTPUT,
  69         COLOR_MSG,
  70         COLOR_ERRMSG,
  71         COLOR_SEPARATOR,
  72         COLOR_TOP,
  73         COLOR_BOT,
  74 };
  75
  76 struct gui_command {
  77         const char *key;
  78         const char *name;
  79         const char *description;
  80         void (*handler)(void);
  81 };
  82
  83 static struct gui_theme theme;
  84
  85 static void com_help(void);
  86 static void com_reread_conf(void);
  87 static void com_enlarge_top_win(void);
  88 static void com_shrink_top_win(void);
  89 static void com_version(void);
  90 __noreturn static void com_quit(void);
  91 static void com_refresh(void);
  92 static void com_ll_incr(void);
  93 static void com_ll_decr(void);
  94 static void com_prev_theme(void);
  95 static void com_next_theme(void);
  96 static void com_scroll_up(void);
  97 static void com_scroll_down(void);
  98 static void com_page_up(void);
  99 static void com_page_down(void);
 100 static void com_cancel_scrolling(void);
 101 static void com_scroll_top(void);
 102
 103 static struct gui_command command_list[] = {
 104         {
 105                 .key = "?",
 106                 .name = "help",
 107                 .description = "print help",
 108                 .handler = com_help
 109         }, {
 110                 .key = "+",
 111                 .name = "enlarge_win",
 112                 .description = "enlarge the top window",
 113                 .handler = com_enlarge_top_win
 114         }, {
 115                 .key = "-",
 116                 .name = "shrink_win",
 117                 .description = "shrink the top window",
 118                 .handler = com_shrink_top_win
 119         }, {
 120                 .key = "r",
 121                 .name = "reread_conf",
 122                 .description = "reread configuration file",
 123                 .handler = com_reread_conf
 124         }, {
 125                 .key = "q",
 126                 .name = "quit",
 127                 .description = "exit para_gui",
 128                 .handler = com_quit
 129         }, {
 130                 .key = "^L",
 131                 .name = "refresh",
 132                 .description = "redraw the screen",
 133                 .handler = com_refresh
 134         }, {
 135                 .key = ".",
 136                 .name = "next_theme",
 137                 .description = "switch to next theme",
 138                 .handler = com_next_theme
 139         }, {
 140                 .key = ",",
 141                 .name = "prev_theme",
 142                 .description = "switch to previous stream",
 143                 .handler = com_prev_theme
 144         }, {
 145                 .key = ">",
 146                 .name = "ll_incr",
 147                 .description = "increase loglevel (decreases verbosity)",
 148                 .handler = com_ll_incr
 149         }, {
 150                 .key = "<",
 151                 .name = "ll_decr",
 152                 .description = "decrease loglevel (increases verbosity)",
 153                 .handler = com_ll_decr
 154         }, {
 155                 .key = "V",
 156                 .name = "version",
 157                 .description = "show the para_gui version",
 158                 .handler = com_version
 159         }, {
 160                 .key = "<up>",
 161                 .name = "scroll_up",
 162                 .description = "scroll up one line",
 163                 .handler = com_scroll_up
 164         }, {
 165                 .key = "<down>",
 166                 .name = "scroll_down",
 167                 .description = "scroll down one line",
 168                 .handler = com_scroll_down
 169         }, {
 170                 .key = "<ppage>",
 171                 .name = "page_up",
 172                 .description = "scroll up one page",
 173                 .handler = com_page_up
 174         }, {
 175                 .key = "<npage>",
 176                 .name = "page_down",
 177                 .description = "scroll down one page",
 178                 .handler = com_page_down
 179         }, {
 180                 .key = "<home>",
 181                 .name = "scroll_top",
 182                 .description = "scroll to top of buffer",
 183                 .handler = com_scroll_top
 184         }, {
 185                 .key = "<end>",
 186                 .name = "cancel_scroll",
 187                 .description = "deactivate scroll mode",
 188                 .handler = com_cancel_scrolling
 189         }, {
 190                 .handler = NULL
 191         }
 192 };
 193
 194 static int find_cmd_byname(char *name)
 195 {
 196         int i;
 197
 198         for (i = 0; command_list[i].handler; i++)
 199                 if (!strcmp(command_list[i].name, name))
 200                         return i;
 201         return -1;
 202 }
 203
 204 /*
 205  * Even though ncurses provides getmaxx and getmaxy, these functions/macros are
 206  * not described in the XSI Curses standard.
 207  */
 208 static int get_num_lines(struct gui_window *w)
 209 {
 210         int lines;
 211         __a_unused int cols; /* avoid "set but not used" warnings */
 212
 213         getmaxyx(w->win, lines, cols);
 214         return lines;
 215 }
 216
 217 static int get_num_cols(struct gui_window *w)
 218 {
 219         __a_unused int lines; /* avoid "set but not used" warnings */
 220         int cols;
 221
 222         getmaxyx(w->win, lines, cols);
 223         return cols;
 224 }
 225
 226 /** Number of lines of the window are occupied by an output line. */
 227 #define NUM_LINES(len) (1 + (len) / get_num_cols(&bot))
 228
 229 /* isendwin() returns false before initscr() was called */
 230 static bool curses_active(void)
 231 {
 232         return top.win && !isendwin();
 233 }
 234
 235 /* taken from mutt */
 236 static char *km_keyname(int c)
 237 {
 238         static char buf[10];
 239
 240         if (c == KEY_UP) {
 241                 sprintf(buf, "<up>");
 242                 return buf;
 243         }
 244         if (c == KEY_DOWN) {
 245                 sprintf(buf, "<down>");
 246                 return buf;
 247         }
 248         if (c == KEY_LEFT) {
 249                 sprintf(buf, "<left>");
 250                 return buf;
 251         }
 252         if (c == KEY_RIGHT) {
 253                 sprintf(buf, "<right>");
 254                 return buf;
 255         }
 256         if (c == KEY_NPAGE) {
 257                 sprintf(buf, "<npage>");
 258                 return buf;
 259         }
 260         if (c == KEY_PPAGE) {
 261                 sprintf(buf, "<ppage>");
 262                 return buf;
 263         }
 264         if (c == KEY_HOME) {
 265                 sprintf(buf, "<home>");
 266                 return buf;
 267         }
 268         if (c == KEY_END) {
 269                 sprintf(buf, "<end>");
 270                 return buf;
 271         }
 272         if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
 273                 if (c < 0)
 274                         c += 256;
 275                 if (c < 128) {
 276                         buf[0] = '^';
 277                         buf[1] = (c + '@') & 0x7f;
 278                         buf[2] = 0;
 279                 } else
 280                         snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
 281                                 (c >> 3) & 7, c & 7);
 282         } else if (c >= KEY_F0 && c < KEY_F(256))
 283                 sprintf(buf, "<F%d>", c - KEY_F0);
 284         else if (isprint(c))
 285                 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
 286         else
 287                 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
 288         return buf;
 289 }
 290
 291 /* Print given number of spaces to curses window. */
 292 static void add_spaces(WINDOW* win, unsigned int num)
 293 {
 294         char space[] = "                                ";
 295         unsigned sz = sizeof(space) - 1; /* number of spaces */
 296
 297         while (num >= sz)  {
 298                 waddstr(win, space);
 299                 num -= sz;
 300         }
 301         if (num > 0) {
 302                 assert(num < sz);
 303                 space[num] = '\0';
 304                 waddstr(win, space);
 305         }
 306 }
 307
 308 /*
 309  * print aligned string to curses window. This function always prints
 310  * exactly len chars.
 311  */
 312 static int align_str(WINDOW* win, char *str, unsigned int len,
 313                 unsigned int align)
 314 {
 315         int ret, i, num; /* of spaces */
 316         size_t width;
 317
 318         if (!win || !str)
 319                 return 0;
 320         ret = strwidth(str, &width);
 321         if (ret < 0) {
 322                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 323                 width = 0;
 324                 str[0] = '\0';
 325         }
 326         num = len - width;
 327         if (num < 0) {
 328                 str[len] = '\0';
 329                 num = 0;
 330         }
 331         /* replace control characters by spaces */
 332         for (i = 0; i < len && str[i]; i++) {
 333                 if (str[i] == '\n' || str[i] == '\r' || str[i] == '\f')
 334                         str[i] = ' ';
 335         }
 336         if (align == LEFT) {
 337                 waddstr(win, str);
 338                 add_spaces(win, num);
 339         } else if (align == RIGHT) {
 340                 add_spaces(win, num);
 341                 waddstr(win, str);
 342         } else {
 343                 add_spaces(win, num / 2);
 344                 waddstr(win, str[0]? str: "");
 345                 add_spaces(win, num - num / 2);
 346         }
 347         return 1;
 348 }
 349
 350 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
 351 {
 352         char *msg;
 353         va_list ap;
 354
 355         if (!curses_active())
 356                 return;
 357         wattron(in.win, COLOR_PAIR(color));
 358         va_start(ap, fmt);
 359         xvasprintf(&msg, fmt, ap);
 360         va_end(ap);
 361         wmove(in.win, 0, 0);
 362         align_str(in.win, msg, get_num_cols(&in), LEFT);
 363         free(msg);
 364         wrefresh(in.win);
 365 }
 366
 367 static void print_status_bar(void)
 368 {
 369         char *tmp;
 370
 371         tmp = para_strdup("para_gui " PACKAGE_VERSION " (hit ? for help)");
 372         wmove(sb.win, 0, 0);
 373         align_str(sb.win, tmp, get_num_cols(&sb), CENTER);
 374         free(tmp);
 375 }
 376
 377 /*
 378  * get the number of the oldest rbe that is (partially) visible. On return,
 379  * lines contains the sum of the number of lines of all visible entries. If the
 380  * first one is only partially visible, lines is greater than bot.lines.
 381  */
 382 static int first_visible_rbe(unsigned *lines)
 383 {
 384         int i, bot_lines = get_num_lines(&bot);
 385
 386         *lines = 0;
 387         for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
 388                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
 389                 int rbe_lines;
 390                 if (!rbe)
 391                         return i - 1;
 392                 rbe_lines = NUM_LINES(rbe->len);
 393                 if (rbe_lines > bot_lines)
 394                         return -1;
 395                 *lines += rbe_lines;
 396                 if (*lines >= bot_lines)
 397                         return i;
 398         }
 399         return RINGBUFFER_SIZE - 1;
 400 }
 401
 402 /*
 403 returns number of first visible rbe, *lines is the number of lines drawn.
 404  */
 405 static int draw_top_rbe(unsigned *lines)
 406 {
 407         int bot_cols, bot_lines, ret, fvr = first_visible_rbe(lines);
 408         struct rb_entry *rbe;
 409         size_t bytes_to_skip, cells_to_skip, width;
 410
 411         if (fvr < 0)
 412                 return -1;
 413         wmove(bot.win, 0, 0);
 414         rbe = ringbuffer_get(bot_win_rb, fvr);
 415         if (!rbe)
 416                 return -1;
 417         getmaxyx(bot.win, bot_lines, bot_cols);
 418         if (*lines > bot_lines) {
 419                 /* rbe is partially visible multi-line */
 420                 cells_to_skip = (*lines - bot_lines) * bot_cols;
 421                 ret = skip_cells(rbe->msg, cells_to_skip, &bytes_to_skip);
 422                 if (ret < 0)
 423                         return ret;
 424                 ret = strwidth(rbe->msg + bytes_to_skip, &width);
 425                 if (ret < 0)
 426                         return ret;
 427         } else {
 428                 bytes_to_skip = 0;
 429                 width = rbe->len;
 430         }
 431         wattron(bot.win, COLOR_PAIR(rbe->color));
 432         waddstr(bot.win, rbe->msg + bytes_to_skip);
 433         *lines = NUM_LINES(width);
 434         return fvr;
 435 }
 436
 437 static void redraw_bot_win(void)
 438 {
 439         unsigned lines;
 440         int i, bot_lines = get_num_lines(&bot);
 441
 442         wmove(bot.win, 0, 0);
 443         wclear(bot.win);
 444         i = draw_top_rbe(&lines);
 445         if (i <= 0)
 446                 goto out;
 447         while (i > 0 && lines < bot_lines) {
 448                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
 449                 if (!rbe) {
 450                         lines++;
 451                         waddstr(bot.win, "\n");
 452                         continue;
 453                 }
 454                 lines += NUM_LINES(rbe->len);
 455                 wattron(bot.win, COLOR_PAIR(rbe->color));
 456                 waddstr(bot.win, "\n");
 457                 waddstr(bot.win, rbe->msg);
 458         }
 459 out:
 460         wrefresh(bot.win);
 461 }
 462
 463 static void rb_add_entry(int color, char *msg)
 464 {
 465         struct rb_entry *old, *new;
 466         int x, y;
 467         size_t len;
 468
 469         if (strwidth(msg, &len) < 0)
 470                 return;
 471         new = para_malloc(sizeof(struct rb_entry));
 472         new->color = color;
 473         new->len = len;
 474         new->msg = msg;
 475         old = ringbuffer_add(bot_win_rb, new);
 476         if (old) {
 477                 free(old->msg);
 478                 free(old);
 479         }
 480         if (scroll_position) {
 481                 /* discard current scrolling, like xterm does */
 482                 scroll_position = 0;
 483                 redraw_bot_win();
 484                 return;
 485         }
 486         wattron(bot.win, COLOR_PAIR(color));
 487         getyx(bot.win, y, x);
 488         if (y || x)
 489                 waddstr(bot.win, "\n");
 490         waddstr(bot.win, msg);
 491 }
 492
 493 /*
 494  * print formated output to bot win and refresh
 495  */
 496 __printf_2_3 static void outputf(int color, const char* fmt,...)
 497 {
 498         char *msg;
 499         va_list ap;
 500
 501         if (!curses_active())
 502                 return;
 503         va_start(ap, fmt);
 504         xvasprintf(&msg, fmt, ap);
 505         va_end(ap);
 506         rb_add_entry(color, msg);
 507         wrefresh(bot.win);
 508 }
 509
 510 static int add_output_line(char *line, void *data)
 511 {
 512         int color = *(int *)data? COLOR_ERRMSG : COLOR_OUTPUT;
 513
 514         if (!curses_active())
 515                 return 1;
 516         rb_add_entry(color, para_strdup(line));
 517         return 1;
 518 }
 519
 520 static __printf_2_3 void curses_log(int ll, const char *fmt,...)
 521 {
 522         va_list ap;
 523
 524         if (ll < loglevel)
 525                 return;
 526         va_start(ap, fmt);
 527         if (curses_active()) {
 528                 int color = ll <= LL_NOTICE? COLOR_MSG : COLOR_ERRMSG;
 529                 char *msg;
 530                 unsigned bytes = xvasprintf(&msg, fmt, ap);
 531                 if (bytes > 0 && msg[bytes - 1] == '\n')
 532                         msg[bytes - 1] = '\0'; /* cut trailing newline */
 533                 rb_add_entry(color, msg);
 534                 wrefresh(bot.win);
 535         } else if (cmd_pid <= 0) /* no external command running */
 536                 vfprintf(stderr, fmt, ap);
 537         va_end(ap);
 538 }
 539 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
 540
 541 static void setup_signal_handling(void)
 542 {
 543         signal_pipe = para_signal_init();
 544         para_install_sighandler(SIGINT);
 545         para_install_sighandler(SIGTERM);
 546         para_install_sighandler(SIGCHLD);
 547         para_install_sighandler(SIGWINCH);
 548         para_install_sighandler(SIGUSR1);
 549 }
 550
 551 static void shutdown_curses(void)
 552 {
 553         def_prog_mode();
 554         endwin();
 555 }
 556
 557 /* disable curses, print a message, kill running processes and exit */
 558 __noreturn __printf_2_3 static void die(int exit_code, const char* fmt, ...)
 559 {
 560         va_list argp;
 561
 562         shutdown_curses();
 563         va_start(argp, fmt);
 564         vfprintf(stderr, fmt, argp);
 565         va_end(argp);
 566         /* kill every process in the process group and exit */
 567         para_sigaction(SIGTERM, SIG_IGN);
 568         kill(0, SIGTERM);
 569         exit(exit_code);
 570 }
 571
 572 /*
 573  * Print stat item #i to curses window
 574  */
 575 static void print_stat_item(int i)
 576 {
 577         char *tmp;
 578         struct stat_item_data d = theme.data[i];
 579         char *c = stat_content[i];
 580         int top_lines = get_num_lines(&top);
 581
 582         if (!curses_active() || !d.len || !c)
 583                 return;
 584         tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
 585         wmove(top.win, d.y * top_lines / 100, d.x * COLS / 100);
 586         wrefresh(top.win);
 587         wattron(top.win, COLOR_PAIR(i + 1));
 588         align_str(top.win, tmp, d.len * COLS / 100, d.align);
 589         free(tmp);
 590         wrefresh(top.win);
 591 }
 592
 593 static int update_item(int item_num, char *buf)
 594 {
 595         char **c = stat_content + item_num;
 596
 597         free(*c);
 598         if (buf && buf[0])
 599                 goto dup;
 600         switch (item_num) {
 601         case SI_ARTIST:
 602                 *c = para_strdup("(artist tag not set)");
 603                 goto print;
 604         case SI_TITLE:
 605                 *c = para_strdup("(title tag not set)");
 606                 goto print;
 607         case SI_YEAR:
 608                 *c = para_strdup("????");
 609                 goto print;
 610         case SI_ALBUM:
 611                 *c = para_strdup("(album tag not set)");
 612                 goto print;
 613         case SI_COMMENT:
 614                 *c = para_strdup("(comment tag not set)");
 615                 goto print;
 616         }
 617 dup:
 618         *c = para_strdup(buf);
 619 print:
 620         print_stat_item(item_num);
 621         return 1;
 622 }
 623
 624 static int read_stat_pipe(fd_set *rfds)
 625 {
 626         static char *buf;
 627         static int bufsize, loaded;
 628         int ret, ret2;
 629         size_t sz;
 630
 631         if (stat_pipe < 0)
 632                 return 0;
 633         if (loaded >= bufsize) {
 634                 if (bufsize > 1000 * 1000) {
 635                         loaded = 0;
 636                         return 0;
 637                 }
 638                 bufsize += bufsize + 1000;
 639                 buf = para_realloc(buf, bufsize);
 640         }
 641         assert(loaded < bufsize);
 642         ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
 643                 rfds, &sz);
 644         loaded += sz;
 645         ret2 = for_each_stat_item(buf, loaded, update_item);
 646         if (ret < 0 || ret2 < 0) {
 647                 loaded = 0;
 648                 return ret2 < 0? ret2 : ret;
 649         }
 650         sz = ret2; /* what is left */
 651         if (sz > 0 && sz < loaded)
 652                 memmove(buf, buf + loaded - sz, sz);
 653         loaded = sz;
 654         return 1;
 655 }
 656
 657 static void print_all_items(void)
 658 {
 659         int i;
 660
 661         if (!curses_active())
 662                 return;
 663         FOR_EACH_STATUS_ITEM(i)
 664                 print_stat_item(i);
 665 }
 666
 667 static void clear_all_items(void)
 668 {
 669         int i;
 670
 671         FOR_EACH_STATUS_ITEM(i) {
 672                 free(stat_content[i]);
 673                 stat_content[i] = para_strdup("");
 674         }
 675 }
 676
 677 /*
 678  * init all windows
 679  */
 680 static void init_wins(int top_lines)
 681 {
 682         int top_y = 0, bot_y = top_lines + 1, sb_y = LINES - 2,
 683                 in_y = LINES - 1, sep_y = top_lines;
 684         int bot_lines = LINES - top_lines - 3, sb_lines = 1, in_lines = 1,
 685                 sep_lines = 1;
 686
 687         assume_default_colors(theme.default_fg, theme.default_bg);
 688         if (top.win) {
 689                 wresize(top.win, top_lines, COLS);
 690                 mvwin(top.win, top_y, 0);
 691
 692                 wresize(sb.win, sb_lines, COLS);
 693                 mvwin(sb.win, sb_y, 0);
 694
 695                 wresize(sep.win, sep_lines, COLS);
 696                 mvwin(sep.win, sep_y, 0);
 697
 698                 wresize(bot.win, bot_lines, COLS);
 699                 mvwin(bot.win, bot_y, 0);
 700
 701                 wresize(in.win, in_lines, COLS);
 702                 mvwin(in.win, in_y, 0);
 703         } else {
 704                 sep.win = newwin(sep_lines, COLS, sep_y, 0);
 705                 top.win = newwin(top_lines, COLS, top_y, 0);
 706                 bot.win = newwin(bot_lines, COLS, bot_y, 0);
 707                 sb.win = newwin(sb_lines, COLS, sb_y, 0);
 708                 in.win = newwin(in_lines, COLS, in_y, 0);
 709                 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
 710                         die(EXIT_FAILURE, "Error: Cannot create curses windows\n");
 711                 wclear(bot.win);
 712                 wclear(sb.win);
 713                 wclear(in.win);
 714                 scrollok(bot.win, 1);
 715                 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
 716                 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
 717                 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
 718                 wattron(top.win, COLOR_PAIR(COLOR_TOP));
 719                 nodelay(top.win, 1);
 720                 nodelay(bot.win, 1);
 721                 nodelay(sb.win, 1);
 722                 nodelay(in.win, 0);
 723
 724                 keypad(top.win, 1);
 725                 keypad(bot.win, 1);
 726                 keypad(sb.win, 1);
 727                 keypad(in.win, 1);
 728         }
 729         wmove(sep.win, 0, 0);
 730         whline(sep.win, theme.sep_char, COLS);
 731         wclear(top.win);
 732         print_all_items();
 733         //wclear(bot.win);
 734         wnoutrefresh(top.win);
 735         wnoutrefresh(bot.win);
 736         print_status_bar();
 737         wnoutrefresh(sb.win);
 738         wnoutrefresh(in.win);
 739         wnoutrefresh(sep.win);
 740         doupdate();
 741 }
 742
 743 static void init_pair_or_die(short pair, short f, short b)
 744 {
 745         if (init_pair(pair, f, b) == ERR)
 746                 die(EXIT_FAILURE, "fatal: init_pair() failed\n");
 747 }
 748
 749 static void init_colors_or_die(void)
 750 {
 751         int i;
 752
 753         if (!has_colors())
 754                 die(EXIT_FAILURE, "fatal: No color term\n");
 755         if (start_color() == ERR)
 756                 die(EXIT_FAILURE, "fatal: failed to start colors\n");
 757         FOR_EACH_STATUS_ITEM(i)
 758                 if (theme.data[i].len)
 759                         init_pair_or_die(i + 1, theme.data[i].fg,
 760                                 theme.data[i].bg);
 761         init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
 762         init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
 763         init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
 764         init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
 765         init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
 766         init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
 767         init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
 768         init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
 769 }
 770
 771 /* (Re-)initialize the curses library. */
 772 static void init_curses(void)
 773 {
 774         if (curses_active())
 775                 return;
 776         if (top.win && refresh() == ERR) /* refresh is really needed */
 777                 die(EXIT_FAILURE, "refresh() failed\n");
 778         if (LINES < theme.lines_min || COLS < theme.cols_min)
 779                 die(EXIT_FAILURE, "Terminal (%dx%d) too small"
 780                         " (need at least %dx%d)\n", COLS, LINES,
 781                         theme.cols_min, theme.lines_min);
 782         curs_set(0); /* make cursor invisible, ignore errors */
 783         nonl(); /* do not NL->CR/NL on output, always returns OK */
 784         /* don't echo input */
 785         if (noecho() == ERR)
 786                 die(EXIT_FAILURE, "fatal: noecho() failed\n");
 787         /* take input chars one at a time, no wait for \n */
 788         if (cbreak() == ERR)
 789                 die(EXIT_FAILURE, "fatal: cbreak() failed\n");
 790         init_colors_or_die();
 791         clear(); /* ignore non-fatal errors */
 792         init_wins(theme.top_lines_default);
 793         // noecho(); /* don't echo input */
 794 }
 795
 796 static void check_sigchld(void)
 797 {
 798         int ret;
 799         pid_t pid;
 800
 801 reap_next_child:
 802         ret = para_reap_child(&pid);
 803         if (ret <= 0)
 804                 return;
 805         if (pid == cmd_pid)
 806                 cmd_pid = 0;
 807         goto reap_next_child;
 808 }
 809
 810 /*
 811  * This sucker modifies its first argument. *handler and *arg are
 812  * pointers to 0-terminated strings (inside line). Crap.
 813  */
 814 static int split_key_map(char *line, char **handler, char **arg)
 815 {
 816         if (!(*handler = strchr(line + 1, ':')))
 817                 goto err_out;
 818         **handler = '\0';
 819         (*handler)++;
 820         if (!(*arg = strchr(*handler, ':')))
 821                 goto err_out;
 822         **arg = '\0';
 823         (*arg)++;
 824         return 1;
 825 err_out:
 826         return 0;
 827 }
 828
 829 static void check_key_map_args_or_die(void)
 830 {
 831         int i;
 832         char *tmp = NULL;
 833
 834         for (i = 0; i < conf.key_map_given; ++i) {
 835                 char *handler, *arg;
 836
 837                 free(tmp);
 838                 tmp = para_strdup(conf.key_map_arg[i]);
 839                 if (!split_key_map(tmp, &handler, &arg))
 840                         break;
 841                 if (strlen(handler) != 1)
 842                         break;
 843                 if (*handler != 'x' && *handler != 'd' && *handler != 'i'
 844                                 && *handler != 'p')
 845                         break;
 846                 if (*handler != 'i')
 847                         continue;
 848                 if (find_cmd_byname(arg) < 0)
 849                         break;
 850         }
 851         if (i != conf.key_map_given)
 852                 die(EXIT_FAILURE, "invalid key map: %s\n", conf.key_map_arg[i]);
 853         free(tmp);
 854 }
 855
 856 static void parse_config_file_or_die(bool override)
 857 {
 858         bool err;
 859         char *config_file;
 860         struct gui_cmdline_parser_params params = {
 861                 .override = override,
 862                 .initialize = 0,
 863                 .check_required = !override,
 864                 .check_ambiguity = 0,
 865                 .print_errors = 1,
 866         };
 867
 868         if (conf.config_file_given)
 869                 config_file = para_strdup(conf.config_file_arg);
 870         else {
 871                 char *home = para_homedir();
 872                 config_file = make_message("%s/.paraslash/gui.conf", home);
 873                 free(home);
 874         }
 875         if (!file_exists(config_file)) {
 876                 if (!conf.config_file_given)
 877                         err = false;
 878                 else {
 879                         PARA_EMERG_LOG("config file %s does not exist\n",
 880                                 config_file);
 881                         err = true;
 882                 }
 883                 goto out;
 884         }
 885         gui_cmdline_parser_config_file(config_file, &conf, &params);
 886         loglevel = get_loglevel_by_name(conf.loglevel_arg);
 887         check_key_map_args_or_die();
 888         theme_init(conf.theme_arg, &theme);
 889         err = false;
 890 out:
 891         free(config_file);
 892         if (err)
 893                 exit(EXIT_FAILURE);
 894 }
 895
 896 /*
 897  * React to various signal-related events
 898  */
 899 static void handle_signal(int sig)
 900 {
 901         switch (sig) {
 902         case SIGTERM:
 903                 die(EXIT_FAILURE, "only the good die young (caught SIGTERM)\n");
 904                 return;
 905         case SIGWINCH:
 906                 if (curses_active()) {
 907                         shutdown_curses();
 908                         init_curses();
 909                         redraw_bot_win();
 910                 }
 911                 return;
 912         case SIGINT:
 913                 PARA_WARNING_LOG("caught SIGINT, reset\n");
 914                 /* Nothing to do. SIGINT killed our child which gets noticed
 915                  * by do_select and resets everything.
 916                  */
 917                 return;
 918         case SIGUSR1:
 919                 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration\n");
 920                 com_reread_conf();
 921                 return;
 922         case SIGCHLD:
 923                 check_sigchld();
 924                 return;
 925         }
 926 }
 927
 928 static void status_pre_select(fd_set *rfds, int *max_fileno, struct timeval *tv)
 929 {
 930         static struct timeval next_exec, atm, diff;
 931         int ret, fds[3] = {0, 1, 0};
 932         pid_t pid;
 933
 934         if (stat_pipe >= 0)
 935                 goto success;
 936         /* Avoid busy loop */
 937         gettimeofday(&atm, NULL);
 938         if (tv_diff(&next_exec, &atm, &diff) > 0) {
 939                 if (tv_diff(&diff, tv, NULL) < 0)
 940                         *tv = diff;
 941                 return;
 942         }
 943         next_exec.tv_sec = atm.tv_sec + 2;
 944         ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
 945         if (ret < 0)
 946                 return;
 947         ret = mark_fd_nonblocking(fds[1]);
 948         if (ret < 0) {
 949                 close(fds[1]);
 950                 return;
 951         }
 952         stat_pipe = fds[1];
 953 success:
 954         para_fd_set(stat_pipe, rfds, max_fileno);
 955 }
 956
 957 #define COMMAND_BUF_SIZE 32768
 958
 959 /*
 960  * This is the core select loop. Besides the (internal) signal
 961  * pipe, the following other fds are checked according to the mode:
 962  *
 963  * GETCH_MODE: check stdin, return when key is pressed
 964  *
 965  * COMMAND_MODE: check command fds and stdin. Return when peer has closed both
 966  * stdout and stderr or when any key is pressed.
 967  *
 968  * EXTERNAL_MODE: Check only signal pipe. Used when an external command
 969  * is running. During that time curses is disabled.  Returns when
 970  * cmd_pid == 0.
 971  */
 972 static int do_select(int mode)
 973 {
 974         fd_set rfds;
 975         int ret, i, max_fileno;
 976         char command_buf[2][COMMAND_BUF_SIZE] = {"", ""};
 977         int cbo[2] = {0, 0}; /* command buf offsets */
 978         struct timeval tv;
 979         unsigned flags[2] = {0, 0}; /* for for_each_line() */
 980
 981 repeat:
 982         tv.tv_sec = conf.timeout_arg  / 1000;
 983         tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
 984 //      ret = refresh_status();
 985         FD_ZERO(&rfds);
 986         max_fileno = 0;
 987         status_pre_select(&rfds, &max_fileno, &tv);
 988         /* signal pipe */
 989         para_fd_set(signal_pipe, &rfds, &max_fileno);
 990         /* command pipe only for COMMAND_MODE */
 991         if (mode == COMMAND_MODE) {
 992                 if (command_fds[0] >= 0)
 993                         para_fd_set(command_fds[0], &rfds, &max_fileno);
 994                 if (command_fds[1] >= 0)
 995                         para_fd_set(command_fds[1], &rfds, &max_fileno);
 996         }
 997         if (mode == GETCH_MODE || mode == COMMAND_MODE)
 998                 para_fd_set(STDIN_FILENO, &rfds, &max_fileno);
 999         ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
1000         if (ret <= 0)
1001                 goto check_return; /* skip fd checks */
1002         /* signals */
1003         ret = para_next_signal(&rfds);
1004         if (ret > 0)
1005                 handle_signal(ret);
1006         /* read command pipe if ready */
1007         if (mode == COMMAND_MODE) {
1008                 for (i = 0; i < 2; i++) {
1009                         size_t sz;
1010                         if (command_fds[i] < 0)
1011                                 continue;
1012                         ret = read_nonblock(command_fds[i],
1013                                 command_buf[i] + cbo[i],
1014                                 COMMAND_BUF_SIZE - 1 - cbo[i], &rfds, &sz);
1015                         cbo[i] += sz;
1016                         sz = cbo[i];
1017                         cbo[i] = for_each_line(flags[i], command_buf[i], cbo[i],
1018                                 add_output_line, &i);
1019                         if (sz != cbo[i]) { /* at least one line found */
1020                                 wrefresh(bot.win);
1021                                 flags[i] = 0;
1022                         }
1023                         if (ret < 0) {
1024                                 PARA_NOTICE_LOG("closing command fd %d: %s\n",
1025                                         i, para_strerror(-ret));
1026                                 close(command_fds[i]);
1027                                 command_fds[i] = -1;
1028                                 flags[i] = 0;
1029                                 cbo[i] = 0;
1030                                 if (command_fds[!i] < 0) /* both fds closed */
1031                                         return 0;
1032                         }
1033                         if (cbo[i] == COMMAND_BUF_SIZE - 1) {
1034                                 PARA_NOTICE_LOG("discarding overlong line\n");
1035                                 cbo[i] = 0;
1036                                 flags[i] = FELF_DISCARD_FIRST;
1037                         }
1038                 }
1039         }
1040         ret = read_stat_pipe(&rfds);
1041         if (ret < 0) {
1042                 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1043                 close(stat_pipe);
1044                 stat_pipe = -1;
1045                 clear_all_items();
1046                 free(stat_content[SI_BASENAME]);
1047                 stat_content[SI_BASENAME] =
1048                         para_strdup("stat command terminated!?");
1049                 print_all_items();
1050         }
1051 check_return:
1052         switch (mode) {
1053         case COMMAND_MODE:
1054                 ret = wgetch(top.win);
1055                 if (ret != ERR && ret != KEY_RESIZE) {
1056                         if (cmd_pid)
1057                                 kill(cmd_pid, SIGTERM);
1058                         return -1;
1059                 }
1060                 break;
1061         case GETCH_MODE:
1062                 ret = wgetch(top.win);
1063                 if (ret != ERR && ret != KEY_RESIZE)
1064                         return ret;
1065                 break;
1066         case EXTERNAL_MODE:
1067                 if (cmd_pid == 0)
1068                         return 0;
1069         }
1070         goto repeat;
1071 }
1072
1073 /* read from command pipe and print data to bot window */
1074 static void exec_and_display_cmd(const char *cmd)
1075 {
1076         int ret, fds[3] = {0, 1, 1};
1077
1078         outputf(COLOR_COMMAND, "%s", cmd);
1079         ret = para_exec_cmdline_pid(&cmd_pid, cmd, fds);
1080         if (ret < 0)
1081                 return;
1082         ret = mark_fd_nonblocking(fds[1]);
1083         if (ret < 0)
1084                 goto fail;
1085         ret = mark_fd_nonblocking(fds[2]);
1086         if (ret < 0)
1087                 goto fail;
1088         command_fds[0] = fds[1];
1089         command_fds[1] = fds[2];
1090         if (do_select(COMMAND_MODE) >= 0)
1091                 PARA_INFO_LOG("command complete\n");
1092         else
1093                 PARA_NOTICE_LOG("command aborted\n");
1094         print_in_bar(COLOR_MSG, " ");
1095         return;
1096 fail:
1097         PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1098         close(command_fds[0]);
1099         close(command_fds[1]);
1100 }
1101
1102 static void para_cmd(char *cmd)
1103 {
1104         char *c;
1105
1106         print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1107         c = make_message(BINDIR "/para_client -- %s", cmd);
1108         exec_and_display_cmd(c);
1109         free(c);
1110 }
1111
1112 static void display_cmd(char *cmd)
1113 {
1114         print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1115         exec_and_display_cmd(cmd);
1116 }
1117
1118 /*
1119  * shutdown curses and stat pipe before executing external commands
1120  */
1121 static void external_cmd(char *cmd)
1122 {
1123         int fds[3] = {-1, -1, -1};
1124
1125         if (cmd_pid)
1126                 return;
1127         shutdown_curses();
1128         if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1129                 return;
1130         do_select(EXTERNAL_MODE);
1131         init_curses();
1132 }
1133
1134 static void print_scroll_msg(void)
1135 {
1136         unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1137         int first_rbe = first_visible_rbe(&lines_total);
1138
1139         print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1140                 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1141 }
1142
1143 static void com_scroll_top(void)
1144 {
1145         int i = RINGBUFFER_SIZE - 1, bot_lines = get_num_lines(&bot);
1146         unsigned lines = 0;
1147
1148         while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1149                 i--;
1150         /* i is oldest entry */
1151         for (; lines < bot_lines && i >= 0; i--) {
1152                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1153                 if (!rbe)
1154                         break;
1155                 lines += NUM_LINES(rbe->len);
1156         }
1157         i++;
1158         if (lines > 0 && scroll_position != i) {
1159                 scroll_position = i;
1160                 redraw_bot_win();
1161                 print_scroll_msg();
1162                 return;
1163         }
1164         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1165 }
1166
1167 static void com_cancel_scrolling(void)
1168 {
1169
1170         if (scroll_position == 0) {
1171                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1172                 return;
1173         }
1174         scroll_position = 0;
1175         redraw_bot_win();
1176 }
1177
1178 static void com_page_down(void)
1179 {
1180         unsigned lines = 0;
1181         int i = scroll_position, bot_lines = get_num_lines(&bot);
1182
1183         while (lines < bot_lines && --i > 0) {
1184                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1185                 if (!rbe)
1186                         break;
1187                 lines += NUM_LINES(rbe->len);
1188         }
1189         if (lines) {
1190                 scroll_position = i;
1191                 redraw_bot_win();
1192                 print_scroll_msg();
1193                 return;
1194         }
1195         print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1196 }
1197
1198 static void com_page_up(void)
1199 {
1200         unsigned lines;
1201         int fvr = first_visible_rbe(&lines), bot_lines = get_num_lines(&bot);
1202
1203         if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1204                 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1205                 return;
1206         }
1207         scroll_position = fvr + 1;
1208         for (; scroll_position > 0; scroll_position--) {
1209                 first_visible_rbe(&lines);
1210                 if (lines == bot_lines)
1211                         break;
1212         }
1213         redraw_bot_win();
1214         print_scroll_msg();
1215 }
1216
1217 static void com_scroll_down(void)
1218 {
1219         struct rb_entry *rbe;
1220         int rbe_lines, bot_lines = get_num_lines(&bot);
1221
1222         if (!scroll_position) {
1223                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1224                 return;
1225         }
1226         scroll_position--;
1227         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1228         rbe_lines = NUM_LINES(rbe->len);
1229         wscrl(bot.win, rbe_lines);
1230         wmove(bot.win, bot_lines - rbe_lines, 0);
1231         wattron(bot.win, COLOR_PAIR(rbe->color));
1232         waddstr(bot.win, rbe->msg);
1233         wrefresh(bot.win);
1234         print_scroll_msg();
1235 }
1236
1237 static void com_scroll_up(void)
1238 {
1239         struct rb_entry *rbe = NULL;
1240         unsigned lines;
1241         int i, first_rbe, num_scroll;
1242
1243         /* the entry that is going to vanish */
1244         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1245         if (!rbe)
1246                 goto err_out;
1247         num_scroll = NUM_LINES(rbe->len);
1248         first_rbe = first_visible_rbe(&lines);
1249         if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1250                 goto err_out;
1251         scroll_position++;
1252         wscrl(bot.win, -num_scroll);
1253         i = draw_top_rbe(&lines);
1254         if (i < 0)
1255                 goto err_out;
1256         while (i > 0 && lines < num_scroll) {
1257                 int rbe_lines;
1258                 rbe = ringbuffer_get(bot_win_rb, --i);
1259                 if (!rbe)
1260                         break;
1261                 rbe_lines = NUM_LINES(rbe->len);
1262                 lines += rbe_lines;
1263                 wattron(bot.win, COLOR_PAIR(rbe->color));
1264                 waddstr(bot.win, "\n");
1265                 waddstr(bot.win, rbe->msg);
1266                 if (!i)
1267                         break;
1268                 i--;
1269         }
1270         wrefresh(bot.win);
1271         print_scroll_msg();
1272         return;
1273 err_out:
1274         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1275 }
1276
1277 static void com_ll_decr(void)
1278 {
1279         if (loglevel <= LL_DEBUG) {
1280                 print_in_bar(COLOR_ERRMSG,
1281                         "loglevel already at maximal verbosity\n");
1282                 return;
1283         }
1284         loglevel--;
1285         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1286 }
1287
1288 static void com_ll_incr(void)
1289 {
1290         if (loglevel >= LL_EMERG) {
1291                 print_in_bar(COLOR_ERRMSG,
1292                         "loglevel already at minimal verbosity\n");
1293                 return;
1294         }
1295         loglevel++;
1296         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1297 }
1298
1299 /*
1300  * reread configuration, terminate on errors
1301  */
1302 static void com_reread_conf(void)
1303 {
1304         /*
1305          * gengetopt might print to stderr and exit on errors. So we have to
1306          * shutdown curses first.
1307          */
1308         shutdown_curses();
1309         parse_config_file_or_die(true /* override */);
1310         init_curses();
1311         print_in_bar(COLOR_MSG, "config file reloaded\n");
1312 }
1313
1314 static void com_help(void)
1315 {
1316         int i;
1317
1318         for (i = 0; i < conf.key_map_given; ++i) {
1319                 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1320                 const char *handler_text = "???", *desc = NULL;
1321
1322                 if (!split_key_map(tmp, &handler, &arg)) {
1323                         free(tmp);
1324                         return;
1325                 }
1326                 switch (*handler) {
1327                         case 'i':
1328                                 handler_text = "internal";
1329                                 desc = command_list[find_cmd_byname(arg)].description;
1330                                 break;
1331                         case 'x': handler_text = "external"; break;
1332                         case 'd': handler_text = "display "; break;
1333                         case 'p': handler_text = "para    "; break;
1334                 }
1335                 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1336                         strlen(arg) < 8? "\t" : "",
1337                         desc? desc : "");
1338                 free(tmp);
1339         }
1340         for (i = 0; command_list[i].handler; i++) {
1341                 struct gui_command gc = command_list[i];
1342
1343                 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1344                         strlen(gc.name) < 8? "\t" : "",
1345                         gc.description);
1346         }
1347         print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1348                 "for more info");
1349 }
1350
1351 static void com_shrink_top_win(void)
1352 {
1353         int top_lines = get_num_lines(&top);
1354
1355         if (top_lines <= theme.top_lines_min) {
1356                 PARA_WARNING_LOG("can not decrease top window\n");
1357                 return;
1358         }
1359         init_wins(top_lines - 1);
1360         print_in_bar(COLOR_MSG, "%s", "decreased top window");
1361 }
1362
1363 static void com_enlarge_top_win(void)
1364 {
1365         int top_lines = get_num_lines(&top), bot_lines = get_num_lines(&bot);
1366
1367         if (bot_lines < 3) {
1368                 PARA_WARNING_LOG("can not increase top window\n");
1369                 return;
1370         }
1371         init_wins(top_lines + 1);
1372         print_in_bar(COLOR_MSG, "increased top window");
1373 }
1374
1375 static void com_version(void)
1376 {
1377         print_in_bar(COLOR_MSG, "%s", version_single_line("gui"));
1378 }
1379
1380 __noreturn static void com_quit(void)
1381 {
1382         die(EXIT_SUCCESS, "%s", "");
1383 }
1384
1385 static void com_refresh(void)
1386 {
1387         shutdown_curses();
1388         init_curses();
1389 }
1390
1391 static void com_next_theme(void)
1392 {
1393         theme_next(&theme);
1394         com_refresh();
1395 }
1396
1397 static void com_prev_theme(void)
1398 {
1399         theme_prev(&theme);
1400         com_refresh();
1401 }
1402
1403 static void handle_command(int c)
1404 {
1405         int i;
1406
1407         /* first check user-defined key bindings */
1408         for (i = 0; i < conf.key_map_given; ++i) {
1409                 char *tmp, *handler, *arg;
1410
1411                 tmp = para_strdup(conf.key_map_arg[i]);
1412                 if (!split_key_map(tmp, &handler, &arg)) {
1413                         free(tmp);
1414                         return;
1415                 }
1416                 if (strcmp(tmp, km_keyname(c))) {
1417                         free(tmp);
1418                         continue;
1419                 }
1420                 if (*handler == 'd')
1421                         display_cmd(arg);
1422                 else if (*handler == 'x')
1423                         external_cmd(arg);
1424                 else if (*handler == 'p')
1425                         para_cmd(arg);
1426                 else if (*handler == 'i') {
1427                         int num = find_cmd_byname(arg);
1428                         if (num >= 0)
1429                                 command_list[num].handler();
1430                 }
1431                 free(tmp);
1432                 return;
1433         }
1434         /* not found, check internal key bindings */
1435         for (i = 0; command_list[i].handler; i++) {
1436                 if (!strcmp(km_keyname(c), command_list[i].key)) {
1437                         command_list[i].handler();
1438                         return;
1439                 }
1440         }
1441         print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1442                 km_keyname(c));
1443 }
1444
1445 __noreturn static void print_help_and_die(void)
1446 {
1447         struct ggo_help h = DEFINE_GGO_HELP(gui);
1448         bool d = conf.detailed_help_given;
1449
1450         ggo_print_help(&h, d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS);
1451         exit(0);
1452 }
1453
1454 int main(int argc, char *argv[])
1455 {
1456         int ret;
1457
1458         gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
1459         loglevel = get_loglevel_by_name(conf.loglevel_arg);
1460         version_handle_flag("gui", conf.version_given);
1461         if (conf.help_given || conf.detailed_help_given)
1462                 print_help_and_die();
1463         parse_config_file_or_die(false /* override */);
1464         setup_signal_handling();
1465         bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1466         setlocale(LC_CTYPE, "");
1467         initscr(); /* needed only once, always successful */
1468         init_curses();
1469         for (;;) {
1470                 print_status_bar();
1471                 ret = do_select(GETCH_MODE);
1472                 if (!ret)
1473                         continue;
1474                 print_in_bar(COLOR_MSG, " ");
1475                 handle_command(ret);
1476         }
1477 }