gui.c

   1 /*
   2  * Copyright (C) 1998-2013 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
  15 #include "gui.cmdline.h"
  16 #include "para.h"
  17 #include "gui.h"
  18 #include "string.h"
  19 #include "ringbuffer.h"
  20 #include "fd.h"
  21 #include "error.h"
  22 #include "list.h"
  23 #include "sched.h"
  24 #include "signal.h"
  25 #include "version.h"
  26
  27 /** define the array of error lists needed by para_gui */
  28 INIT_GUI_ERRLISTS;
  29 static char *stat_content[NUM_STAT_ITEMS];
  30
  31 #define STANDARD_STATUS_BAR "para_gui " PACKAGE_VERSION " (hit ? for help)"
  32
  33 static int signal_pipe;
  34
  35 static struct win_data {
  36         WINDOW *win;
  37         size_t begx;
  38         size_t begy;
  39         size_t cols;
  40         size_t lines;
  41 } top, bot, sb, in, sep;
  42
  43 #define RINGBUFFER_SIZE 512
  44 struct rb_entry {
  45         char *msg;
  46         size_t len;
  47         int color;
  48 };
  49 static struct ringbuffer *bot_win_rb;
  50 #define NUM_LINES(len) (1 + (len) / bot.cols)
  51
  52 static unsigned scroll_position;
  53
  54 static int cmd_died, curses_active;
  55 static pid_t cmd_pid;
  56
  57 static int command_fds[2];
  58 static int stat_pipe = -1;
  59 static struct gui_args_info conf;
  60
  61 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
  62
  63
  64 #define COLOR_STATUSBAR 52
  65 #define COLOR_COMMAND 53
  66 #define COLOR_OUTPUT 54
  67 #define COLOR_MSG 55
  68 #define COLOR_ERRMSG 56
  69 #define COLOR_WELCOME 57
  70 #define COLOR_SEPARATOR 58
  71 #define COLOR_TOP 59
  72 #define COLOR_BOT 60
  73
  74 struct gui_command {
  75         const char *key;
  76         const char *name;
  77         const char *description;
  78         void (*handler)(void);
  79 };
  80
  81 struct stat_item {
  82         char name[MAXLINE];
  83         char prefix[MAXLINE];
  84         char postfix[MAXLINE];
  85         unsigned y;
  86         unsigned x;
  87         unsigned len;
  88         int fg, bg;
  89         int align;
  90         char content[MAXLINE];
  91 };
  92
  93 static struct gui_theme theme;
  94
  95 static int _argc;
  96 static char **_argv;
  97
  98 static void com_help(void);
  99 static void com_reread_conf(void);
 100 static void com_enlarge_top_win(void);
 101 static void com_shrink_top_win(void);
 102 static void com_version(void);
 103 __noreturn static void com_quit(void);
 104 static void com_refresh(void);
 105 static void com_ll_incr(void);
 106 static void com_ll_decr(void);
 107 static void com_prev_theme(void);
 108 static void com_next_theme(void);
 109 static void com_scroll_up(void);
 110 static void com_scroll_down(void);
 111 static void com_page_up(void);
 112 static void com_page_down(void);
 113 static void com_cancel_scrolling(void);
 114 static void com_scroll_top(void);
 115
 116 static struct gui_command command_list[] = {
 117         {
 118                 .key = "?",
 119                 .name = "help",
 120                 .description = "print help",
 121                 .handler = com_help
 122         }, {
 123                 .key = "+",
 124                 .name = "enlarge_win",
 125                 .description = "enlarge the top window",
 126                 .handler = com_enlarge_top_win
 127         }, {
 128                 .key = "-",
 129                 .name = "shrink_win",
 130                 .description = "shrink the top window",
 131                 .handler = com_shrink_top_win
 132         }, {
 133                 .key = "r",
 134                 .name = "reread_conf",
 135                 .description = "reread configuration file",
 136                 .handler = com_reread_conf
 137         }, {
 138                 .key = "q",
 139                 .name = "quit",
 140                 .description = "exit para_gui",
 141                 .handler = com_quit
 142         }, {
 143                 .key = "^L",
 144                 .name = "refresh",
 145                 .description = "redraw the screen",
 146                 .handler = com_refresh
 147         }, {
 148                 .key = ".",
 149                 .name = "next_theme",
 150                 .description = "switch to next theme",
 151                 .handler = com_next_theme
 152         }, {
 153                 .key = ",",
 154                 .name = "prev_theme",
 155                 .description = "switch to previous stream",
 156                 .handler = com_prev_theme
 157         }, {
 158                 .key = ">",
 159                 .name = "ll_incr",
 160                 .description = "increase loglevel (decreases verbosity)",
 161                 .handler = com_ll_incr
 162         }, {
 163                 .key = "<",
 164                 .name = "ll_decr",
 165                 .description = "decrease loglevel (increases verbosity)",
 166                 .handler = com_ll_decr
 167         }, {
 168                 .key = "V",
 169                 .name = "version",
 170                 .description = "show the para_gui version",
 171                 .handler = com_version
 172         }, {
 173                 .key = "<up>",
 174                 .name = "scroll_up",
 175                 .description = "scroll up one line",
 176                 .handler = com_scroll_up
 177         }, {
 178                 .key = "<down>",
 179                 .name = "scroll_down",
 180                 .description = "scroll down one line",
 181                 .handler = com_scroll_down
 182         }, {
 183                 .key = "<ppage>",
 184                 .name = "page_up",
 185                 .description = "scroll up one page",
 186                 .handler = com_page_up
 187         }, {
 188                 .key = "<npage>",
 189                 .name = "page_down",
 190                 .description = "scroll down one page",
 191                 .handler = com_page_down
 192         }, {
 193                 .key = "<home>",
 194                 .name = "scroll_top",
 195                 .description = "scroll to top of buffer",
 196                 .handler = com_scroll_top
 197         }, {
 198                 .key = "<end>",
 199                 .name = "cancel_scroll",
 200                 .description = "deactivate scroll mode",
 201                 .handler = com_cancel_scrolling
 202         }, {
 203                 .handler = NULL
 204         }
 205 };
 206
 207 static int find_cmd_byname(char *name)
 208 {
 209         int i;
 210
 211         for (i = 0; command_list[i].handler; i++)
 212                 if (!strcmp(command_list[i].name, name))
 213                         return i;
 214         return -1;
 215 }
 216
 217 /* taken from mutt */
 218 static char *km_keyname(int c)
 219 {
 220         static char buf[10];
 221
 222         if (c == KEY_UP) {
 223                 sprintf(buf, "<up>");
 224                 return buf;
 225         }
 226         if (c == KEY_DOWN) {
 227                 sprintf(buf, "<down>");
 228                 return buf;
 229         }
 230         if (c == KEY_LEFT) {
 231                 sprintf(buf, "<left>");
 232                 return buf;
 233         }
 234         if (c == KEY_RIGHT) {
 235                 sprintf(buf, "<right>");
 236                 return buf;
 237         }
 238         if (c == KEY_NPAGE) {
 239                 sprintf(buf, "<npage>");
 240                 return buf;
 241         }
 242         if (c == KEY_PPAGE) {
 243                 sprintf(buf, "<ppage>");
 244                 return buf;
 245         }
 246         if (c == KEY_HOME) {
 247                 sprintf(buf, "<home>");
 248                 return buf;
 249         }
 250         if (c == KEY_END) {
 251                 sprintf(buf, "<end>");
 252                 return buf;
 253         }
 254         if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
 255                 if (c < 0)
 256                         c += 256;
 257                 if (c < 128) {
 258                         buf[0] = '^';
 259                         buf[1] = (c + '@') & 0x7f;
 260                         buf[2] = 0;
 261                 } else
 262                         snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
 263                                 (c >> 3) & 7, c & 7);
 264         } else if (c >= KEY_F0 && c < KEY_F(256))
 265                 sprintf(buf, "<F%d>", c - KEY_F0);
 266         else if (isprint(c))
 267                 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
 268         else
 269                 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
 270         return buf;
 271 }
 272
 273 static char *configfile_exists(void)
 274 {
 275         static char *config_file;
 276         char *tmp;
 277
 278         if (!conf.config_file_given) {
 279                 if (!config_file) {
 280                         char *home = para_homedir();
 281                         config_file = make_message("%s/.paraslash/gui.conf",
 282                                 home);
 283                         free(home);
 284                 }
 285                 tmp = config_file;
 286         } else
 287                 tmp = conf.config_file_arg;
 288         return file_exists(tmp)? tmp: NULL;
 289 }
 290
 291 /*
 292  * print num spaces to curses window
 293  */
 294 static void add_spaces(WINDOW* win, unsigned int num)
 295 {
 296         while (num > 0) {
 297                 num--;
 298                 waddstr(win, " ");
 299         }
 300 }
 301
 302 /*
 303  * print aligned string to curses window. This function always prints
 304  * exactly len chars.
 305  */
 306 static int align_str(WINDOW* win, char *str, unsigned int len,
 307                 unsigned int align)
 308 {
 309         int ret, i, num; /* of spaces */
 310         size_t width;
 311
 312         if (!win || !str)
 313                 return 0;
 314         ret = strwidth(str, &width);
 315         if (ret < 0) {
 316                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 317                 width = 0;
 318                 str[0] = '\0';
 319         }
 320         num = len - width;
 321         if (num < 0) {
 322                 str[len] = '\0';
 323                 num = 0;
 324         }
 325         /* replace control characters by spaces */
 326         for (i = 0; i < len && str[i]; i++) {
 327                 if (str[i] == '\n' || str[i] == '\r' || str[i] == '\f')
 328                         str[i] = ' ';
 329         }
 330         if (align == LEFT) {
 331                 waddstr(win, str);
 332                 add_spaces(win, num);
 333         } else if (align == RIGHT) {
 334                 add_spaces(win, num);
 335                 waddstr(win, str);
 336         } else {
 337                 add_spaces(win, num / 2);
 338                 waddstr(win, str[0]? str: "");
 339                 add_spaces(win, num - num / 2);
 340         }
 341         return 1;
 342 }
 343
 344 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
 345 {
 346         char *msg;
 347         va_list ap;
 348
 349         if (!curses_active)
 350                 return;
 351         wattron(in.win, COLOR_PAIR(color));
 352         va_start(ap, fmt);
 353         xvasprintf(&msg, fmt, ap);
 354         va_end(ap);
 355         wmove(in.win, 0, 0);
 356         align_str(in.win, msg, sb.cols, LEFT);
 357         free(msg);
 358         wrefresh(in.win);
 359 }
 360
 361 /*
 362  * update the status bar
 363  */
 364 static void print_status_bar(void)
 365 {
 366         char *tmp;
 367
 368         if (!curses_active)
 369                 return;
 370         tmp = para_strdup(STANDARD_STATUS_BAR);
 371         wmove(sb.win, 0, 0);
 372         align_str(sb.win, tmp, sb.cols, CENTER);
 373         free(tmp);
 374         wrefresh(sb.win);
 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 visable 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;
 385         *lines = 0;
 386         for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
 387                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
 388                 int rbe_lines;
 389                 if (!rbe)
 390                         return i - 1;
 391 //              fprintf(stderr, "found: %s\n", rbe->msg);
 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 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         if (*lines > bot.lines) {
 418                 /* rbe is partially visible multi-line */
 419                 cells_to_skip = (*lines - bot.lines) * bot.cols;
 420                 ret = skip_cells(rbe->msg, cells_to_skip, &bytes_to_skip);
 421                 if (ret < 0)
 422                         return ret;
 423                 ret = strwidth(rbe->msg + bytes_to_skip, &width);
 424                 if (ret < 0)
 425                         return ret;
 426         } else {
 427                 bytes_to_skip = 0;
 428                 width = rbe->len;
 429         }
 430         wattron(bot.win, COLOR_PAIR(rbe->color));
 431         waddstr(bot.win, rbe->msg + bytes_to_skip);
 432         *lines = NUM_LINES(width);
 433         return fvr;
 434 }
 435
 436 static void redraw_bot_win(void)
 437 {
 438         unsigned lines;
 439         int i;
 440
 441         wmove(bot.win, 0, 0);
 442         wclear(bot.win);
 443         i = draw_top_rbe(&lines);
 444         if (i <= 0)
 445                 goto out;
 446         while (i > 0 && lines < bot.lines) {
 447                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
 448                 if (!rbe) {
 449                         lines++;
 450                         waddstr(bot.win, "\n");
 451                         continue;
 452                 }
 453                 lines += NUM_LINES(rbe->len);
 454                 wattron(bot.win, COLOR_PAIR(rbe->color));
 455                 waddstr(bot.win, "\n");
 456                 waddstr(bot.win, rbe->msg);
 457         }
 458 out:
 459         wrefresh(bot.win);
 460 }
 461
 462 static void rb_add_entry(int color, char *msg)
 463 {
 464         struct rb_entry *old, *new;
 465         int x, y;
 466         size_t len;
 467
 468         if (strwidth(msg, &len) < 0)
 469                 return;
 470         new = para_malloc(sizeof(struct rb_entry));
 471         new->color = color;
 472         new->len = len;
 473         new->msg = msg;
 474         old = ringbuffer_add(bot_win_rb, new);
 475 //      fprintf(stderr, "added: %s\n", new->msg);
 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         if (!curses_active)
 514                 return 1;
 515         rb_add_entry(color, para_strdup(line));
 516         return 1;
 517 }
 518
 519 static int loglevel;
 520
 521 __printf_2_3 void curses_log(int ll, const char *fmt,...)
 522 {
 523         int color;
 524         char *msg;
 525         va_list ap;
 526
 527         if (ll < loglevel || !curses_active)
 528                 return;
 529         switch (ll) {
 530                 case LL_DEBUG:
 531                 case LL_INFO:
 532                 case LL_NOTICE:
 533                         color = COLOR_MSG;
 534                         break;
 535                 default:
 536                         color = COLOR_ERRMSG;
 537         }
 538         va_start(ap, fmt);
 539         xvasprintf(&msg, fmt, ap);
 540         va_end(ap);
 541         chop(msg);
 542         rb_add_entry(color, msg);
 543         wrefresh(bot.win);
 544 }
 545 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
 546
 547 static void setup_signal_handling(void)
 548 {
 549         signal_pipe = para_signal_init();
 550         para_install_sighandler(SIGINT);
 551         para_install_sighandler(SIGTERM);
 552         para_install_sighandler(SIGCHLD);
 553         para_install_sighandler(SIGWINCH);
 554         para_install_sighandler(SIGUSR1);
 555         para_sigaction(SIGHUP, SIG_IGN);
 556 }
 557
 558 __noreturn static void do_exit(int ret)
 559 {
 560         para_sigaction(SIGTERM, SIG_IGN);
 561         kill(0, SIGTERM);
 562         exit(ret);
 563 }
 564
 565 static void shutdown_curses(void)
 566 {
 567         if (!curses_active)
 568                 return;
 569         def_prog_mode();
 570         curses_active = 0;
 571         endwin();
 572 }
 573
 574 __noreturn static void finish(int ret)
 575 {
 576         shutdown_curses();
 577         do_exit(ret);
 578 }
 579
 580 /*
 581  * exit curses and print given message to stdout/stderr
 582  */
 583 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
 584 {
 585         va_list argp;
 586         FILE *outfd = ret? stderr: stdout;
 587
 588         shutdown_curses();
 589         va_start(argp, fmt);
 590         vfprintf(outfd, fmt, argp);
 591         va_end(argp);
 592         do_exit(ret);
 593 }
 594
 595 static void print_welcome(void)
 596 {
 597         if (loglevel > LL_NOTICE)
 598                 return;
 599         outputf(COLOR_WELCOME, "Welcome to para_gui " PACKAGE_VERSION
 600                 " \"" CODENAME "\". Theme: %s", theme.name);
 601         wclrtoeol(bot.win);
 602 }
 603
 604 /*
 605  * init all windows
 606  */
 607 static void init_wins(int top_lines)
 608 {
 609         int i;
 610
 611         top.lines = top_lines;
 612         top.cols = COLS;
 613         top.begy = 0;
 614         top.begx = 0;
 615
 616         bot.lines = LINES - top.lines - 3;
 617         bot.cols = COLS;
 618         bot.begy = top.lines + 1;
 619         bot.begx = 0;
 620
 621         sb.lines = 1;
 622         sb.cols = COLS;
 623         sb.begy = LINES - 2;
 624         sb.begx = 0;
 625
 626         in.lines = 1;
 627         in.cols = COLS;
 628         in.begy = LINES - 1;
 629         in.begx = 0;
 630
 631         sep.lines = 1;
 632         sep.cols = COLS;
 633         sep.begy = top.lines;
 634         sep.begx = 0;
 635
 636         assume_default_colors(theme.default_fg, theme.default_bg);
 637         if (top.win) {
 638                 mvwin(top.win, top.begy, top.begx);
 639                 wresize(top.win, top.lines, top.cols);
 640
 641                 mvwin(sb.win, sb.begy, sb.begx);
 642                 wresize(sb.win, sb.lines, sb.cols);
 643
 644                 mvwin(sep.win, sep.begy, sep.begx);
 645                 wresize(sep.win, sep.lines, sep.cols);
 646
 647                 mvwin(bot.win, bot.begy, bot.begx);
 648                 wresize(bot.win, bot.lines, bot.cols);
 649
 650                 mvwin(in.win, in.begy, in.begx);
 651                 wresize(in.win, in.lines, in.cols);
 652         } else {
 653                 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
 654                 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
 655                 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
 656                 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
 657                 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
 658                 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
 659                         msg_n_exit(1, "Error: Cannot create curses windows\n");
 660                 wclear(bot.win);
 661                 wclear(sb.win);
 662                 wclear(in.win);
 663                 scrollok(bot.win, 1);
 664                 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
 665                 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
 666                 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
 667                 wattron(top.win, COLOR_PAIR(COLOR_TOP));
 668                 nodelay(top.win, 1);
 669                 nodelay(bot.win, 1);
 670                 nodelay(sb.win, 1);
 671                 nodelay(in.win, 0);
 672
 673                 keypad(top.win, 1);
 674                 keypad(bot.win, 1);
 675                 keypad(sb.win, 1);
 676                 keypad(in.win, 1);
 677                 print_status_bar();
 678         }
 679         wmove(sep.win, 0, 0);
 680         for (i = 1; i <= COLS; i++)
 681                 waddstr(sep.win, theme.sep_str);
 682         wclear(top.win);
 683         //wclear(bot.win);
 684         wnoutrefresh(top.win);
 685         wnoutrefresh(bot.win);
 686         //wnoutrefresh(sb.win);
 687         print_status_bar();
 688         wnoutrefresh(in.win);
 689         wnoutrefresh(sep.win);
 690         doupdate();
 691 }
 692
 693 /*
 694  * Print stat item #i to curses window
 695  */
 696 static void print_stat_item(int i)
 697 {
 698         char *tmp;
 699         struct stat_item_data d = theme.data[i];
 700         char *c = stat_content[i];
 701
 702         if (!curses_active || !d.len || !c)
 703                 return;
 704         tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
 705         wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
 706         wrefresh(top.win);
 707         wattron(top.win, COLOR_PAIR(i + 1));
 708         align_str(top.win, tmp, d.len * COLS / 100, d.align);
 709         free(tmp);
 710         wrefresh(top.win);
 711 }
 712
 713 static int update_item(int item_num, char *buf)
 714 {
 715         char **c = stat_content + item_num;
 716
 717         free(*c);
 718         if (buf && buf[0])
 719                 goto dup;
 720         switch (item_num) {
 721         case SI_ARTIST:
 722                 *c = para_strdup("(artist tag not set)");
 723                 goto print;
 724         case SI_TITLE:
 725                 *c = para_strdup("(title tag not set)");
 726                 goto print;
 727         case SI_YEAR:
 728                 *c = para_strdup("????");
 729                 goto print;
 730         case SI_ALBUM:
 731                 *c = para_strdup("(album tag not set)");
 732                 goto print;
 733         case SI_COMMENT:
 734                 *c = para_strdup("(comment tag not set)");
 735                 goto print;
 736         }
 737 dup:
 738         *c = para_strdup(buf);
 739 print:
 740         print_stat_item(item_num);
 741         return 1;
 742 }
 743
 744 static int read_stat_pipe(fd_set *rfds)
 745 {
 746         static char *buf;
 747         static int bufsize, loaded;
 748         int ret, ret2;
 749         size_t sz;
 750
 751         if (stat_pipe < 0)
 752                 return 0;
 753         if (loaded >= bufsize) {
 754                 if (bufsize > 1000 * 1000) {
 755                         loaded = 0;
 756                         return 0;
 757                 }
 758                 bufsize += bufsize + 1000;
 759                 buf = para_realloc(buf, bufsize);
 760         }
 761         assert(loaded < bufsize);
 762         ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
 763                 rfds, &sz);
 764         loaded += sz;
 765         ret2 = for_each_stat_item(buf, loaded, update_item);
 766         if (ret < 0 || ret2 < 0) {
 767                 loaded = 0;
 768                 return ret2 < 0? ret2 : ret;
 769         }
 770         sz = ret2; /* what is left */
 771         if (sz > 0 && sz < loaded)
 772                 memmove(buf, buf + loaded - sz, sz);
 773         loaded = sz;
 774         return 1;
 775 }
 776
 777 static void print_all_items(void)
 778 {
 779         int i;
 780
 781         if (!curses_active)
 782                 return;
 783         FOR_EACH_STATUS_ITEM(i)
 784                 print_stat_item(i);
 785 }
 786
 787 static void clear_all_items(void)
 788 {
 789         int i;
 790
 791         FOR_EACH_STATUS_ITEM(i) {
 792                 free(stat_content[i]);
 793                 stat_content[i] = para_strdup("");
 794         }
 795 }
 796
 797 static void init_pair_or_die(short pair, short f, short b)
 798 {
 799         if (init_pair(pair, f, b) == ERR)
 800                 msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
 801 }
 802
 803 static void init_colors_or_die(void)
 804 {
 805         int i;
 806
 807         if (!has_colors())
 808                 msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
 809         if (start_color() == ERR)
 810                 msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
 811         FOR_EACH_STATUS_ITEM(i)
 812                 if (theme.data[i].len)
 813                         init_pair_or_die(i + 1, theme.data[i].fg,
 814                                 theme.data[i].bg);
 815         init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
 816         init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
 817         init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
 818         init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
 819         init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
 820         init_pair_or_die(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
 821         init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
 822         init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
 823         init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
 824 }
 825
 826 /* (Re-)initialize the curses library. */
 827 static void init_curses(void)
 828 {
 829         curses_active = 1;
 830         if (top.win && refresh() == ERR) /* refesh is really needed */
 831                 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
 832         if (LINES < theme.lines_min || COLS < theme.cols_min)
 833                 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
 834                         " (need at least %dx%d)\n", COLS, LINES,
 835                         theme.cols_min, theme.lines_min);
 836         curs_set(0); /* make cursor invisible, ignore errors */
 837         nonl(); /* do not NL->CR/NL on output, always returns OK */
 838         /* don't echo input */
 839         if (noecho() == ERR)
 840                 msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
 841         /* take input chars one at a time, no wait for \n */
 842         if (cbreak() == ERR)
 843                 msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
 844         init_colors_or_die();
 845         clear(); /* ignore non-fatal errors */
 846         init_wins(theme.top_lines_default);
 847         print_all_items();
 848         // noecho(); /* don't echo input */
 849 }
 850
 851 static void check_sigchld(void)
 852 {
 853         int ret;
 854         pid_t pid;
 855 reap_next_child:
 856         ret = para_reap_child(&pid);
 857         if (ret <= 0)
 858                 return;
 859         if (pid == cmd_pid) {
 860                 cmd_pid = 0;
 861                 cmd_died = 1;
 862         }
 863         goto reap_next_child;
 864 }
 865
 866 /*
 867  * This sucker modifies its first argument. *handler and *arg are
 868  * pointers to 0-terminated strings (inside line). Crap.
 869  */
 870 static int split_key_map(char *line, char **handler, char **arg)
 871 {
 872         if (!(*handler = strchr(line + 1, ':')))
 873                 goto err_out;
 874         **handler = '\0';
 875         (*handler)++;
 876         if (!(*arg = strchr(*handler, ':')))
 877                 goto err_out;
 878         **arg = '\0';
 879         (*arg)++;
 880         return 1;
 881 err_out:
 882         return 0;
 883 }
 884
 885 static int check_key_map_args(void)
 886 {
 887         char *s;
 888         int i, ret = -1;
 889         char *tmp = NULL, *handler, *arg;
 890
 891         for (i = 0; i < conf.key_map_given; ++i) {
 892                 s = conf.key_map_arg[i];
 893                 if (!(*s))
 894                         goto err_out;
 895                 free(tmp);
 896                 tmp = para_strdup(s);
 897                 if (!split_key_map(tmp, &handler, &arg))
 898                         goto err_out;
 899                 if (strlen(handler) != 1)
 900                         goto err_out;
 901                 if (*handler != 'x'
 902                         && *handler != 'd'
 903                         && *handler != 'i'
 904                         && *handler != 'p')
 905                         goto err_out;
 906                 if (*handler != 'i')
 907                         continue;
 908                 if (find_cmd_byname(arg) < 0)
 909                         goto err_out;
 910         }
 911         ret = 0;
 912 err_out:
 913         free(tmp);
 914         return ret;
 915 }
 916
 917 /*
 918  * React to various signal-related events
 919  */
 920 static void handle_signal(int sig)
 921 {
 922         switch (sig) {
 923         case SIGTERM:
 924                 msg_n_exit(EXIT_FAILURE,
 925                         "only the good die young (caught SIGTERM))\n");
 926                 return;
 927         case SIGWINCH:
 928                 if (curses_active) {
 929                         shutdown_curses();
 930                         init_curses();
 931                         redraw_bot_win();
 932                 }
 933                 return;
 934         case SIGINT:
 935                 PARA_WARNING_LOG("caught SIGINT, reset");
 936                 /* Nothing to do. SIGINT killed our child which gets noticed
 937                  * by do_select and resets everything.
 938                  */
 939                 return;
 940         case SIGUSR1:
 941                 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration");
 942                 com_reread_conf();
 943                 return;
 944         case SIGCHLD:
 945                 check_sigchld();
 946                 return;
 947         }
 948 }
 949
 950 static int open_stat_pipe(void)
 951 {
 952         static int init = 1;
 953         int ret, fds[3] = {0, 1, 0};
 954         pid_t pid;
 955
 956         if (init)
 957                 init = 0;
 958         else
 959                 /*
 960                  * Sleep a bit to avoid a busy loop. As the call to sleep() may
 961                  * be interrupted by SIGCHLD, we simply wait until the call
 962                  * succeeds.
 963                  */
 964                 while (sleep(2))
 965                         ; /* nothing */
 966         ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
 967         if (ret < 0)
 968                 return ret;
 969         ret = mark_fd_nonblocking(fds[1]);
 970         if (ret >= 0)
 971                 return fds[1];
 972         close(fds[1]);
 973         return ret;
 974 }
 975
 976 #define COMMAND_BUF_SIZE 4096
 977
 978 /*
 979  * This is the core select loop. Besides the (internal) signal
 980  * pipe, the following other fds are checked according to the mode:
 981  *
 982  * GETCH_MODE: check stdin, return when key is pressed
 983  *
 984  * COMMAND_MODE: check command fds and stdin. Return when peer has closed both
 985  * stdout and stderr or when any key is pressed.
 986  *
 987  * EXTERNAL_MODE: Check only signal pipe. Used when an external command
 988  * is running. During that time curses is disabled.  Returns when
 989  * cmd_pid == 0.
 990  */
 991 static int do_select(int mode)
 992 {
 993         fd_set rfds;
 994         int ret, i, max_fileno;
 995         char command_buf[2][COMMAND_BUF_SIZE] = {"", ""};
 996         int cbo[2] = {0, 0}; /* command buf offsets */
 997         struct timeval tv;
 998
 999 repeat:
1000         tv.tv_sec = conf.timeout_arg  / 1000;
1001         tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
1002 //      ret = refresh_status();
1003         FD_ZERO(&rfds);
1004         max_fileno = 0;
1005         if (stat_pipe < 0)
1006                 stat_pipe = open_stat_pipe();
1007         if (stat_pipe >= 0)
1008                 para_fd_set(stat_pipe, &rfds, &max_fileno);
1009         /* signal pipe */
1010         para_fd_set(signal_pipe, &rfds, &max_fileno);
1011         /* command pipe only for COMMAND_MODE */
1012         if (mode == COMMAND_MODE) {
1013                 if (command_fds[0] >= 0)
1014                         para_fd_set(command_fds[0], &rfds, &max_fileno);
1015                 if (command_fds[1] >= 0)
1016                         para_fd_set(command_fds[1], &rfds, &max_fileno);
1017         }
1018         ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
1019         if (ret <= 0)
1020                 goto check_return; /* skip fd checks */
1021         /* signals */
1022         ret = para_next_signal(&rfds);
1023         if (ret > 0)
1024                 handle_signal(ret);
1025         /* read command pipe if ready */
1026         if (mode == COMMAND_MODE) {
1027                 for (i = 0; i < 2; i++) {
1028                         size_t sz;
1029                         if (command_fds[i] < 0)
1030                                 continue;
1031                         ret = read_nonblock(command_fds[i],
1032                                 command_buf[i] + cbo[i],
1033                                 COMMAND_BUF_SIZE - 1 - cbo[i], &rfds, &sz);
1034                         cbo[i] += sz;
1035                         sz = cbo[i];
1036                         cbo[i] = for_each_line(command_buf[i], cbo[i],
1037                                 add_output_line, &i);
1038                         if (sz != cbo[i])
1039                                 wrefresh(bot.win);
1040                         if (ret < 0) {
1041                                 PARA_NOTICE_LOG("closing command fd %d: %s",
1042                                         i, para_strerror(-ret));
1043                                 close(command_fds[i]);
1044                                 command_fds[i] = -1;
1045                                 if (command_fds[!i] < 0) /* both fds closed */
1046                                         return 0;
1047                         }
1048                 }
1049         }
1050         ret = read_stat_pipe(&rfds);
1051         if (ret < 0) {
1052                 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1053                 close(stat_pipe);
1054                 stat_pipe = -1;
1055                 clear_all_items();
1056                 free(stat_content[SI_BASENAME]);
1057                 stat_content[SI_BASENAME] =
1058                         para_strdup("stat command terminated!?");
1059                 print_all_items();
1060         }
1061 check_return:
1062         switch (mode) {
1063         case COMMAND_MODE:
1064                 ret = wgetch(top.win);
1065                 if (ret != ERR && ret != KEY_RESIZE) {
1066                         if (command_fds[0] >= 0) {
1067                                 close(command_fds[0]);
1068                                 command_fds[0] = -1;
1069                         }
1070                         if (command_fds[1] >= 0) {
1071                                 close(command_fds[1]);
1072                                 command_fds[1] = -1;
1073                         }
1074                         if (cmd_pid)
1075                                 kill(cmd_pid, SIGTERM);
1076                         return -1;
1077                 }
1078                 break;
1079         case GETCH_MODE:
1080                 ret = wgetch(top.win);
1081                 if (ret != ERR && ret != KEY_RESIZE)
1082                         return ret;
1083                 break;
1084         case EXTERNAL_MODE:
1085                 if (cmd_died) {
1086                         cmd_died = 0;
1087                         return 0;
1088                 }
1089         }
1090         goto repeat;
1091 }
1092
1093 /*
1094  * read from command pipe and print data to bot window
1095  */
1096 static void send_output(void)
1097 {
1098         int ret;
1099
1100         ret = mark_fd_nonblocking(command_fds[0]);
1101         if (ret < 0)
1102                 goto fail;
1103         ret = mark_fd_nonblocking(command_fds[1]);
1104         if (ret < 0)
1105                 goto fail;
1106         if (do_select(COMMAND_MODE) >= 0)
1107                 PARA_INFO_LOG("command complete");
1108         else
1109                 PARA_NOTICE_LOG("command aborted");
1110         print_in_bar(COLOR_MSG, " ");
1111         return;
1112 fail:
1113         PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1114         close(command_fds[0]);
1115         close(command_fds[1]);
1116 }
1117
1118 static void para_cmd(char *cmd)
1119 {
1120         int ret, fds[3] = {0, 1, 1};
1121         char *c = make_message(BINDIR "/para_client -- %s", cmd);
1122
1123         outputf(COLOR_COMMAND, "%s", c);
1124         print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1125         ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
1126         free(c);
1127         if (ret < 0)
1128                 return;
1129         command_fds[0] = fds[1];
1130         command_fds[1] = fds[2];
1131         send_output();
1132 }
1133
1134 /*
1135  * exec command and print output to bot win
1136  */
1137 static void display_cmd(char *cmd)
1138 {
1139         int fds[3] = {0, 1, 1};
1140
1141         print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1142         outputf(COLOR_COMMAND, "%s", cmd);
1143         if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1144                 return;
1145         command_fds[0] = fds[1];
1146         command_fds[1] = fds[2];
1147         send_output();
1148 }
1149
1150 /*
1151  * shutdown curses and stat pipe before executing external commands
1152  */
1153 static void external_cmd(char *cmd)
1154 {
1155         int fds[3] = {-1, -1, -1};
1156
1157         if (cmd_pid)
1158                 return;
1159         shutdown_curses();
1160         if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1161                 return;
1162         cmd_died = 0;
1163         do_select(EXTERNAL_MODE);
1164         init_curses();
1165 }
1166
1167 static void print_scroll_msg(void)
1168 {
1169         unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1170         int first_rbe = first_visible_rbe(&lines_total);
1171         print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1172                 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1173 }
1174
1175 static void com_scroll_top(void)
1176 {
1177         int i = RINGBUFFER_SIZE - 1;
1178         unsigned lines = 0;
1179
1180         while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1181                 i--;
1182         /* i is oldest entry */
1183         for (; lines < bot.lines && i >= 0; i--) {
1184                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1185                 if (!rbe)
1186                         break;
1187                 lines += NUM_LINES(rbe->len);
1188         }
1189         i++;
1190         if (lines > 0 && scroll_position != i) {
1191                 scroll_position = i;
1192                 redraw_bot_win();
1193                 print_scroll_msg();
1194                 return;
1195         }
1196         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1197 }
1198
1199 static void com_cancel_scrolling(void)
1200 {
1201
1202         if (scroll_position == 0) {
1203                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1204                 return;
1205         }
1206         scroll_position = 0;
1207         redraw_bot_win();
1208 }
1209
1210 static void com_page_down(void)
1211 {
1212         unsigned lines = 0;
1213         int i = scroll_position;
1214         while (lines < bot.lines && --i > 0) {
1215                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1216                 if (!rbe)
1217                         break;
1218                 lines += NUM_LINES(rbe->len);
1219         }
1220         if (lines) {
1221                 scroll_position = i;
1222                 redraw_bot_win();
1223                 print_scroll_msg();
1224                 return;
1225         }
1226         print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1227 }
1228
1229 static void com_page_up(void)
1230 {
1231         unsigned lines;
1232         int fvr = first_visible_rbe(&lines);
1233
1234         if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1235                 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1236                 return;
1237         }
1238         scroll_position = fvr + 1;
1239         for (; scroll_position > 0; scroll_position--) {
1240                 first_visible_rbe(&lines);
1241                 if (lines == bot.lines)
1242                         break;
1243         }
1244         redraw_bot_win();
1245         print_scroll_msg();
1246 }
1247
1248 static void com_scroll_down(void)
1249 {
1250         struct rb_entry *rbe;
1251         int rbe_lines;
1252
1253         if (!scroll_position) {
1254                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1255                 return;
1256         }
1257         scroll_position--;
1258         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1259         rbe_lines = NUM_LINES(rbe->len);
1260         wscrl(bot.win, rbe_lines);
1261         wmove(bot.win, bot.lines - rbe_lines, 0);
1262         wattron(bot.win, COLOR_PAIR(rbe->color));
1263         waddstr(bot.win, rbe->msg);
1264         wrefresh(bot.win);
1265         print_scroll_msg();
1266 }
1267
1268 static void com_scroll_up(void)
1269 {
1270         struct rb_entry *rbe = NULL;
1271         unsigned lines;
1272         int i, first_rbe, num_scroll;
1273
1274         /* the entry that is going to vanish */
1275         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1276         if (!rbe)
1277                 goto err_out;
1278         num_scroll = NUM_LINES(rbe->len);
1279         first_rbe = first_visible_rbe(&lines);
1280         if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1281                 goto err_out;
1282         scroll_position++;
1283         wscrl(bot.win, -num_scroll);
1284         i = draw_top_rbe(&lines);
1285         if (i < 0)
1286                 goto err_out;
1287         while (i > 0 && lines < num_scroll) {
1288                 int rbe_lines;
1289                 rbe = ringbuffer_get(bot_win_rb, --i);
1290                 if (!rbe)
1291                         break;
1292                 rbe_lines = NUM_LINES(rbe->len);
1293                 lines += rbe_lines;
1294 //              fprintf(stderr, "msg: %s\n", rbe->msg);
1295                 wattron(bot.win, COLOR_PAIR(rbe->color));
1296                 waddstr(bot.win, "\n");
1297                 waddstr(bot.win, rbe->msg);
1298                 if (!i)
1299                         break;
1300                 i--;
1301         }
1302         wrefresh(bot.win);
1303         print_scroll_msg();
1304         return;
1305 err_out:
1306         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1307 }
1308
1309 static void com_ll_decr(void)
1310 {
1311         if (loglevel <= LL_DEBUG) {
1312                 print_in_bar(COLOR_ERRMSG,
1313                         "loglevel already at maximal verbosity\n");
1314                 return;
1315         }
1316         loglevel--;
1317         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1318 }
1319
1320 static void com_ll_incr(void)
1321 {
1322         if (loglevel >= LL_EMERG) {
1323                 print_in_bar(COLOR_ERRMSG,
1324                         "loglevel already at minimal verbosity\n");
1325                 return;
1326         }
1327         loglevel++;
1328         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1329 }
1330
1331 /*
1332  * reread configuration, terminate on errors
1333  */
1334 static void com_reread_conf(void)
1335 {
1336         char *cf =configfile_exists();
1337         struct gui_cmdline_parser_params params = {
1338                 .override = 1,
1339                 .initialize = 1,
1340                 .check_required = 0,
1341                 .check_ambiguity = 0,
1342                 .print_errors = 0,
1343         };
1344
1345         if (!cf) {
1346                 PARA_WARNING_LOG("there is no configuration to read");
1347                 return;
1348         }
1349         PARA_INFO_LOG("rereading command line options and config file");
1350         gui_cmdline_parser_ext(_argc, _argv, &conf, &params);
1351         if (gui_cmdline_parser_config_file(cf, &conf, &params) != 0) {
1352                 PARA_EMERG_LOG("errors in config file");
1353                 finish(EXIT_FAILURE);
1354         }
1355         PARA_NOTICE_LOG("config file reloaded");
1356         if (check_key_map_args() < 0)
1357                 finish(EXIT_FAILURE);
1358 }
1359
1360 static void com_help(void)
1361 {
1362         int i;
1363
1364         for (i = 0; i < conf.key_map_given; ++i) {
1365                 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1366                 const char *handler_text = "???", *desc = NULL;
1367
1368                 if (!split_key_map(tmp, &handler, &arg)) {
1369                         free(tmp);
1370                         return;
1371                 }
1372                 switch (*handler) {
1373                         case 'i':
1374                                 handler_text = "internal";
1375                                 desc = command_list[find_cmd_byname(arg)].description;
1376                                 break;
1377                         case 'x': handler_text = "external"; break;
1378                         case 'd': handler_text = "display "; break;
1379                         case 'p': handler_text = "para    "; break;
1380                 }
1381                 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1382                         strlen(arg) < 8? "\t" : "",
1383                         desc? desc : "");
1384                 free(tmp);
1385         }
1386         for (i = 0; command_list[i].handler; i++) {
1387                 struct gui_command gc = command_list[i];
1388
1389                 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1390                         strlen(gc.name) < 8? "\t" : "",
1391                         gc.description);
1392         }
1393         print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1394                 "for more info");
1395 }
1396
1397 static void com_shrink_top_win(void)
1398 {
1399         if (top.lines <= theme.top_lines_min) {
1400                 PARA_WARNING_LOG("can not decrease top window");
1401                 return;
1402         }
1403         init_wins(top.lines - 1);
1404         wclear(top.win);
1405         print_all_items();
1406         print_in_bar(COLOR_MSG, "%s", "decreased top window");
1407 }
1408
1409 static void com_enlarge_top_win(void)
1410 {
1411         if (bot.lines < 3) {
1412                 PARA_WARNING_LOG("can not increase top window");
1413                 return;
1414         }
1415         init_wins(top.lines + 1);
1416         wclear(top.win);
1417         print_all_items();
1418         print_in_bar(COLOR_MSG, "increased top window");
1419 }
1420
1421 static void com_version(void)
1422 {
1423         print_in_bar(COLOR_MSG, "para_gui " PACKAGE_VERSION " \""
1424                 CODENAME "\"");
1425 }
1426
1427 __noreturn static void com_quit(void)
1428 {
1429         finish(0);
1430 }
1431
1432 static void com_refresh(void)
1433 {
1434         shutdown_curses();
1435         init_curses();
1436 }
1437
1438 static void change_theme(int next)
1439 {
1440         if (next)
1441                 next_theme(&theme);
1442         else
1443                 prev_theme(&theme);
1444         /* This seems to be needed twice, why? */
1445         com_refresh();
1446         com_refresh();
1447         PARA_NOTICE_LOG("new theme: %s", theme.name);
1448 }
1449
1450 static void com_next_theme(void)
1451 {
1452         change_theme(1);
1453 }
1454
1455 static void com_prev_theme(void)
1456 {
1457         change_theme(0);
1458 }
1459
1460
1461 static void handle_command(int c)
1462 {
1463         int i;
1464
1465         /* first check user's key bindings */
1466         for (i = 0; i < conf.key_map_given; ++i) {
1467                 char *tmp, *handler, *arg;
1468
1469                 tmp = para_strdup(conf.key_map_arg[i]);
1470                 if (!split_key_map(tmp, &handler, &arg)) {
1471                         free(tmp);
1472                         return;
1473                 }
1474                 if (strcmp(tmp, km_keyname(c))) {
1475                         free(tmp);
1476                         continue;
1477                 }
1478                 if (*handler == 'd')
1479                         display_cmd(arg);
1480                 else if (*handler == 'x')
1481                         external_cmd(arg);
1482                 else if (*handler == 'p')
1483                         para_cmd(arg);
1484                 else if (*handler == 'i') {
1485                         int num = find_cmd_byname(arg);
1486                         if (num >= 0)
1487                                 command_list[num].handler();
1488                 }
1489                 free(tmp);
1490                 return;
1491         }
1492         /* not found, check internal key bindings */
1493         for (i = 0; command_list[i].handler; i++) {
1494                 if (!strcmp(km_keyname(c), command_list[i].key)) {
1495                         command_list[i].handler();
1496                         return;
1497                 }
1498         }
1499         print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1500                 km_keyname(c));
1501 }
1502
1503 int main(int argc, char *argv[])
1504 {
1505         int ret;
1506         char *cf;
1507
1508         _argc = argc;
1509         _argv = argv;
1510
1511         gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
1512         HANDLE_VERSION_FLAG("gui", conf);
1513         cf = configfile_exists();
1514         if (!cf && conf.config_file_given) {
1515                 fprintf(stderr, "can not read config file %s\n",
1516                         conf.config_file_arg);
1517                 exit(EXIT_FAILURE);
1518         }
1519         if (cf) {
1520                 struct gui_cmdline_parser_params params = {
1521                         .override = 0,
1522                         .initialize = 0,
1523                         .check_required = 0,
1524                         .check_ambiguity = 0,
1525                         .print_errors = 1,
1526                 };
1527                 if (gui_cmdline_parser_config_file(cf, &conf, &params) != 0)
1528                         exit(EXIT_FAILURE);
1529         }
1530         loglevel = get_loglevel_by_name(conf.loglevel_arg);
1531         if (check_key_map_args() < 0) {
1532                 fprintf(stderr, "invalid key map\n");
1533                 exit(EXIT_FAILURE);
1534         }
1535         init_theme_or_die(conf.theme_arg, &theme);
1536         top.lines = theme.top_lines_default;
1537         setup_signal_handling();
1538         bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1539         setlocale(LC_CTYPE, "");
1540         initscr(); /* needed only once, always successful */
1541         init_curses();
1542         print_welcome();
1543         for (;;) {
1544                 print_status_bar();
1545                 ret = do_select(GETCH_MODE);
1546                 if (!ret)
1547                         continue;
1548                 print_in_bar(COLOR_MSG, " ");
1549                 handle_command(ret);
1550         }
1551 }