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 <sys/time.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 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 /* 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);
 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 i, num; /* of spaces */
 316
 317         if (!win || !str)
 318                 return -1;
 319         num = len - strlen(str);
 320         if (num < 0) {
 321                 str[len] = '\0';
 322                 num = 0;
 323         }
 324         /* replace control characters by spaces */
 325         for (i = 0; i < len && str[i]; i++) {
 326                 if (str[i] == '\n' || str[i] == '\r' || str[i] == '\f')
 327                         str[i] = ' ';
 328         }
 329         if (align == LEFT) {
 330                 waddstr(win, str);
 331                 add_spaces(win, num);
 332         } else if (align == RIGHT) {
 333                 add_spaces(win, num);
 334                 waddstr(win, str);
 335         } else {
 336                 add_spaces(win, num / 2);
 337                 waddstr(win, str[0]? str: "");
 338                 add_spaces(win, num - num / 2);
 339         }
 340         return 1;
 341 }
 342
 343 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
 344 {
 345         char *msg;
 346         va_list ap;
 347
 348         if (!curses_active)
 349                 return;
 350         wattron(in.win, COLOR_PAIR(color));
 351         va_start(ap, fmt);
 352         xvasprintf(&msg, fmt, ap);
 353         va_end(ap);
 354         wmove(in.win, 0, 0);
 355         align_str(in.win, msg, sb.cols, LEFT);
 356         free(msg);
 357         wrefresh(in.win);
 358 }
 359
 360 /*
 361  * update the status bar
 362  */
 363 static void print_status_bar(void)
 364 {
 365         char *tmp;
 366
 367         if (!curses_active)
 368                 return;
 369         tmp = para_strdup(STANDARD_STATUS_BAR);
 370         wmove(sb.win, 0, 0);
 371         align_str(sb.win, tmp, sb.cols, CENTER);
 372         free(tmp);
 373         wrefresh(sb.win);
 374 }
 375
 376 /*
 377  * get the number of the oldest rbe that is (partially) visible. On return,
 378  * lines contains the sum of the number of lines of all visable entries. If the
 379  * first one is only partially visible, lines is greater than bot.lines.
 380  */
 381 static int first_visible_rbe(unsigned *lines)
 382 {
 383         int i;
 384         *lines = 0;
 385         for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
 386                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
 387                 int rbe_lines;
 388                 if (!rbe)
 389                         return i - 1;
 390 //              fprintf(stderr, "found: %s\n", rbe->msg);
 391                 rbe_lines = NUM_LINES(rbe->len);
 392                 if (rbe_lines > bot.lines)
 393                         return -1;
 394                 *lines += rbe_lines;
 395                 if (*lines >= bot.lines)
 396                         return i;
 397         }
 398         return RINGBUFFER_SIZE - 1;
 399 }
 400
 401 static int draw_top_rbe(unsigned *lines)
 402 {
 403         unsigned len;
 404         int offset, fvr = first_visible_rbe(lines);
 405         struct rb_entry *rbe;
 406
 407         if (fvr < 0)
 408                 return -1;
 409         wmove(bot.win, 0, 0);
 410         rbe = ringbuffer_get(bot_win_rb, fvr);
 411         if (!rbe)
 412                 return -1;
 413         len = strlen(rbe->msg);
 414         if (*lines > bot.lines) {
 415                 /* first rbe is only partially visible */
 416                 offset = (*lines - bot.lines) * bot.cols;
 417                 assert(offset <= len);
 418         } else
 419                 offset = 0;
 420         wattron(bot.win, COLOR_PAIR(rbe->color));
 421         waddstr(bot.win, rbe->msg + offset);
 422         *lines = NUM_LINES(len - offset);
 423         return fvr;
 424 }
 425
 426 static void redraw_bot_win(void)
 427 {
 428         unsigned lines;
 429         int i;
 430
 431         wmove(bot.win, 0, 0);
 432         wclear(bot.win);
 433         i = draw_top_rbe(&lines);
 434         if (i <= 0)
 435                 goto out;
 436         while (i > 0 && lines < bot.lines) {
 437                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
 438                 if (!rbe) {
 439                         lines++;
 440                         waddstr(bot.win, "\n");
 441                         continue;
 442                 }
 443                 lines += NUM_LINES(rbe->len);
 444                 wattron(bot.win, COLOR_PAIR(rbe->color));
 445                 waddstr(bot.win, "\n");
 446                 waddstr(bot.win, rbe->msg);
 447         }
 448 out:
 449         wrefresh(bot.win);
 450 }
 451
 452 static void rb_add_entry(int color, char *msg)
 453 {
 454         struct rb_entry *old, *new = para_malloc(sizeof(struct rb_entry));
 455         int x, y;
 456         new->color = color;
 457         new->len = strlen(msg);
 458         new->msg = msg;
 459         old = ringbuffer_add(bot_win_rb, new);
 460 //      fprintf(stderr, "added: %s\n", new->msg);
 461         if (old) {
 462                 free(old->msg);
 463                 free(old);
 464         }
 465         if (scroll_position) {
 466                 /* discard current scrolling, like xterm does */
 467                 scroll_position = 0;
 468                 redraw_bot_win();
 469                 return;
 470         }
 471         wattron(bot.win, COLOR_PAIR(color));
 472         getyx(bot.win, y, x);
 473         if (y || x)
 474                 waddstr(bot.win, "\n");
 475         waddstr(bot.win, msg);
 476 }
 477
 478 /*
 479  * print formated output to bot win and refresh
 480  */
 481 __printf_2_3 static void outputf(int color, const char* fmt,...)
 482 {
 483         char *msg;
 484         va_list ap;
 485
 486         if (!curses_active)
 487                 return;
 488         va_start(ap, fmt);
 489         xvasprintf(&msg, fmt, ap);
 490         va_end(ap);
 491         rb_add_entry(color, msg);
 492         wrefresh(bot.win);
 493 }
 494
 495 static int add_output_line(char *line, void *data)
 496 {
 497         int color = *(int *)data? COLOR_ERRMSG : COLOR_OUTPUT;
 498         if (!curses_active)
 499                 return 1;
 500         rb_add_entry(color, para_strdup(line));
 501         return 1;
 502 }
 503
 504 static int loglevel;
 505
 506 __printf_2_3 void curses_log(int ll, const char *fmt,...)
 507 {
 508         int color;
 509         char *msg;
 510         va_list ap;
 511
 512         if (ll < loglevel || !curses_active)
 513                 return;
 514         switch (ll) {
 515                 case LL_DEBUG:
 516                 case LL_INFO:
 517                 case LL_NOTICE:
 518                         color = COLOR_MSG;
 519                         break;
 520                 default:
 521                         color = COLOR_ERRMSG;
 522         }
 523         va_start(ap, fmt);
 524         xvasprintf(&msg, fmt, ap);
 525         va_end(ap);
 526         chop(msg);
 527         rb_add_entry(color, msg);
 528         wrefresh(bot.win);
 529 }
 530 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
 531
 532 static void setup_signal_handling(void)
 533 {
 534         signal_pipe = para_signal_init();
 535         para_install_sighandler(SIGINT);
 536         para_install_sighandler(SIGTERM);
 537         para_install_sighandler(SIGCHLD);
 538         para_install_sighandler(SIGWINCH);
 539         para_install_sighandler(SIGUSR1);
 540         para_sigaction(SIGHUP, SIG_IGN);
 541 }
 542
 543 /* kill every process in the process group and exit */
 544 __noreturn static void kill_pg_and_die(int ret)
 545 {
 546         para_sigaction(SIGTERM, SIG_IGN);
 547         kill(0, SIGTERM);
 548         exit(ret);
 549 }
 550
 551 static void shutdown_curses(void)
 552 {
 553         if (!curses_active)
 554                 return;
 555         def_prog_mode();
 556         curses_active = 0;
 557         endwin();
 558 }
 559
 560 __noreturn static void finish(int ret)
 561 {
 562         shutdown_curses();
 563         kill_pg_and_die(ret);
 564 }
 565
 566 /*
 567  * exit curses and print given message to stdout/stderr
 568  */
 569 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
 570 {
 571         va_list argp;
 572         FILE *outfd = ret? stderr: stdout;
 573
 574         shutdown_curses();
 575         va_start(argp, fmt);
 576         vfprintf(outfd, fmt, argp);
 577         va_end(argp);
 578         kill_pg_and_die(ret);
 579 }
 580
 581 static void print_welcome(void)
 582 {
 583         if (loglevel > LL_NOTICE)
 584                 return;
 585         outputf(COLOR_WELCOME, "Welcome to para_gui " PACKAGE_VERSION
 586                 " \"" CODENAME "\". Theme: %s", theme.name);
 587         wclrtoeol(bot.win);
 588 }
 589
 590 /*
 591  * init all windows
 592  */
 593 static void init_wins(int top_lines)
 594 {
 595         int i;
 596
 597         top.lines = top_lines;
 598         top.cols = COLS;
 599         top.begy = 0;
 600         top.begx = 0;
 601
 602         bot.lines = LINES - top.lines - 3;
 603         bot.cols = COLS;
 604         bot.begy = top.lines + 1;
 605         bot.begx = 0;
 606
 607         sb.lines = 1;
 608         sb.cols = COLS;
 609         sb.begy = LINES - 2;
 610         sb.begx = 0;
 611
 612         in.lines = 1;
 613         in.cols = COLS;
 614         in.begy = LINES - 1;
 615         in.begx = 0;
 616
 617         sep.lines = 1;
 618         sep.cols = COLS;
 619         sep.begy = top.lines;
 620         sep.begx = 0;
 621
 622         assume_default_colors(theme.default_fg, theme.default_bg);
 623         if (top.win) {
 624                 mvwin(top.win, top.begy, top.begx);
 625                 wresize(top.win, top.lines, top.cols);
 626
 627                 mvwin(sb.win, sb.begy, sb.begx);
 628                 wresize(sb.win, sb.lines, sb.cols);
 629
 630                 mvwin(sep.win, sep.begy, sep.begx);
 631                 wresize(sep.win, sep.lines, sep.cols);
 632
 633                 mvwin(bot.win, bot.begy, bot.begx);
 634                 wresize(bot.win, bot.lines, bot.cols);
 635
 636                 mvwin(in.win, in.begy, in.begx);
 637                 wresize(in.win, in.lines, in.cols);
 638         } else {
 639                 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
 640                 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
 641                 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
 642                 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
 643                 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
 644                 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
 645                         msg_n_exit(1, "Error: Cannot create curses windows\n");
 646                 wclear(bot.win);
 647                 wclear(sb.win);
 648                 wclear(in.win);
 649                 scrollok(bot.win, 1);
 650                 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
 651                 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
 652                 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
 653                 wattron(top.win, COLOR_PAIR(COLOR_TOP));
 654                 nodelay(top.win, 1);
 655                 nodelay(bot.win, 1);
 656                 nodelay(sb.win, 1);
 657                 nodelay(in.win, 0);
 658
 659                 keypad(top.win, 1);
 660                 keypad(bot.win, 1);
 661                 keypad(sb.win, 1);
 662                 keypad(in.win, 1);
 663                 print_status_bar();
 664         }
 665         wmove(sep.win, 0, 0);
 666         for (i = 1; i <= COLS; i++)
 667                 waddstr(sep.win, theme.sep_str);
 668         wclear(top.win);
 669         //wclear(bot.win);
 670         wnoutrefresh(top.win);
 671         wnoutrefresh(bot.win);
 672         //wnoutrefresh(sb.win);
 673         print_status_bar();
 674         wnoutrefresh(in.win);
 675         wnoutrefresh(sep.win);
 676         doupdate();
 677 }
 678
 679 /*
 680  * Print stat item #i to curses window
 681  */
 682 static void print_stat_item(int i)
 683 {
 684         char *tmp;
 685         struct stat_item_data d = theme.data[i];
 686         char *c = stat_content[i];
 687
 688         if (!curses_active || !d.len || !c)
 689                 return;
 690         tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
 691         wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
 692         wrefresh(top.win);
 693         wattron(top.win, COLOR_PAIR(i + 1));
 694         align_str(top.win, tmp, d.len * COLS / 100, d.align);
 695         free(tmp);
 696         wrefresh(top.win);
 697 }
 698
 699 static int update_item(int item_num, char *buf)
 700 {
 701         char **c = stat_content + item_num;
 702
 703         free(*c);
 704         if (buf && buf[0])
 705                 goto dup;
 706         switch (item_num) {
 707         case SI_ARTIST:
 708                 *c = para_strdup("(artist tag not set)");
 709                 goto print;
 710         case SI_TITLE:
 711                 *c = para_strdup("(title tag not set)");
 712                 goto print;
 713         case SI_YEAR:
 714                 *c = para_strdup("????");
 715                 goto print;
 716         case SI_ALBUM:
 717                 *c = para_strdup("(album tag not set)");
 718                 goto print;
 719         case SI_COMMENT:
 720                 *c = para_strdup("(comment tag not set)");
 721                 goto print;
 722         }
 723 dup:
 724         *c = para_strdup(buf);
 725 print:
 726         print_stat_item(item_num);
 727         return 1;
 728 }
 729
 730 static int read_stat_pipe(fd_set *rfds)
 731 {
 732         static char *buf;
 733         static int bufsize, loaded;
 734         int ret, ret2;
 735         size_t sz;
 736
 737         if (stat_pipe < 0)
 738                 return 0;
 739         if (loaded >= bufsize) {
 740                 if (bufsize > 1000 * 1000) {
 741                         loaded = 0;
 742                         return 0;
 743                 }
 744                 bufsize += bufsize + 1000;
 745                 buf = para_realloc(buf, bufsize);
 746         }
 747         assert(loaded < bufsize);
 748         ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
 749                 rfds, &sz);
 750         loaded += sz;
 751         ret2 = for_each_stat_item(buf, loaded, update_item);
 752         if (ret < 0 || ret2 < 0) {
 753                 loaded = 0;
 754                 return ret2 < 0? ret2 : ret;
 755         }
 756         sz = ret2; /* what is left */
 757         if (sz > 0 && sz < loaded)
 758                 memmove(buf, buf + loaded - sz, sz);
 759         loaded = sz;
 760         return 1;
 761 }
 762
 763 static void print_all_items(void)
 764 {
 765         int i;
 766
 767         if (!curses_active)
 768                 return;
 769         FOR_EACH_STATUS_ITEM(i)
 770                 print_stat_item(i);
 771 }
 772
 773 static void clear_all_items(void)
 774 {
 775         int i;
 776
 777         FOR_EACH_STATUS_ITEM(i) {
 778                 free(stat_content[i]);
 779                 stat_content[i] = para_strdup("");
 780         }
 781 }
 782
 783 static void init_pair_or_die(short pair, short f, short b)
 784 {
 785         if (init_pair(pair, f, b) == ERR)
 786                 msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
 787 }
 788
 789 static void init_colors_or_die(void)
 790 {
 791         int i;
 792
 793         if (!has_colors())
 794                 msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
 795         if (start_color() == ERR)
 796                 msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
 797         FOR_EACH_STATUS_ITEM(i)
 798                 if (theme.data[i].len)
 799                         init_pair_or_die(i + 1, theme.data[i].fg,
 800                                 theme.data[i].bg);
 801         init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
 802         init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
 803         init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
 804         init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
 805         init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
 806         init_pair_or_die(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
 807         init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
 808         init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
 809         init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
 810 }
 811
 812 /* (Re-)initialize the curses library. */
 813 static void init_curses(void)
 814 {
 815         curses_active = 1;
 816         if (top.win && refresh() == ERR) /* refesh is really needed */
 817                 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
 818         if (LINES < theme.lines_min || COLS < theme.cols_min)
 819                 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
 820                         " (need at least %dx%d)\n", COLS, LINES,
 821                         theme.cols_min, theme.lines_min);
 822         curs_set(0); /* make cursor invisible, ignore errors */
 823         nonl(); /* do not NL->CR/NL on output, always returns OK */
 824         /* don't echo input */
 825         if (noecho() == ERR)
 826                 msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
 827         /* take input chars one at a time, no wait for \n */
 828         if (cbreak() == ERR)
 829                 msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
 830         init_colors_or_die();
 831         clear(); /* ignore non-fatal errors */
 832         init_wins(theme.top_lines_default);
 833         print_all_items();
 834         // noecho(); /* don't echo input */
 835 }
 836
 837 static void check_sigchld(void)
 838 {
 839         int ret;
 840         pid_t pid;
 841 reap_next_child:
 842         ret = para_reap_child(&pid);
 843         if (ret <= 0)
 844                 return;
 845         if (pid == cmd_pid)
 846                 cmd_pid = 0;
 847         goto reap_next_child;
 848 }
 849
 850 /*
 851  * This sucker modifies its first argument. *handler and *arg are
 852  * pointers to 0-terminated strings (inside line). Crap.
 853  */
 854 static int split_key_map(char *line, char **handler, char **arg)
 855 {
 856         if (!(*handler = strchr(line + 1, ':')))
 857                 goto err_out;
 858         **handler = '\0';
 859         (*handler)++;
 860         if (!(*arg = strchr(*handler, ':')))
 861                 goto err_out;
 862         **arg = '\0';
 863         (*arg)++;
 864         return 1;
 865 err_out:
 866         return 0;
 867 }
 868
 869 static int check_key_map_args(void)
 870 {
 871         char *s;
 872         int i, ret = -1;
 873         char *tmp = NULL, *handler, *arg;
 874
 875         for (i = 0; i < conf.key_map_given; ++i) {
 876                 s = conf.key_map_arg[i];
 877                 if (!(*s))
 878                         goto err_out;
 879                 free(tmp);
 880                 tmp = para_strdup(s);
 881                 if (!split_key_map(tmp, &handler, &arg))
 882                         goto err_out;
 883                 if (strlen(handler) != 1)
 884                         goto err_out;
 885                 if (*handler != 'x'
 886                         && *handler != 'd'
 887                         && *handler != 'i'
 888                         && *handler != 'p')
 889                         goto err_out;
 890                 if (*handler != 'i')
 891                         continue;
 892                 if (find_cmd_byname(arg) < 0)
 893                         goto err_out;
 894         }
 895         ret = 0;
 896 err_out:
 897         free(tmp);
 898         return ret;
 899 }
 900
 901 /*
 902  * React to various signal-related events
 903  */
 904 static void handle_signal(int sig)
 905 {
 906         switch (sig) {
 907         case SIGTERM:
 908                 msg_n_exit(EXIT_FAILURE,
 909                         "only the good die young (caught SIGTERM))\n");
 910                 return;
 911         case SIGWINCH:
 912                 if (curses_active) {
 913                         shutdown_curses();
 914                         init_curses();
 915                         redraw_bot_win();
 916                 }
 917                 return;
 918         case SIGINT:
 919                 PARA_WARNING_LOG("caught SIGINT, reset");
 920                 /* Nothing to do. SIGINT killed our child which gets noticed
 921                  * by do_select and resets everything.
 922                  */
 923                 return;
 924         case SIGUSR1:
 925                 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration");
 926                 com_reread_conf();
 927                 return;
 928         case SIGCHLD:
 929                 check_sigchld();
 930                 return;
 931         }
 932 }
 933
 934 static void status_pre_select(fd_set *rfds, int *max_fileno, struct timeval *tv)
 935 {
 936         static struct timeval next_exec, atm, diff;
 937         int ret, fds[3] = {0, 1, 0};
 938         pid_t pid;
 939
 940         if (stat_pipe >= 0)
 941                 goto success;
 942         /* Avoid busy loop */
 943         gettimeofday(&atm, NULL);
 944         if (tv_diff(&next_exec, &atm, &diff) > 0) {
 945                 if (tv_diff(&diff, tv, NULL) < 0)
 946                         *tv = diff;
 947                 return;
 948         }
 949         next_exec.tv_sec = atm.tv_sec + 2;
 950         ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
 951         if (ret < 0)
 952                 return;
 953         ret = mark_fd_nonblocking(fds[1]);
 954         if (ret < 0) {
 955                 close(fds[1]);
 956                 return;
 957         }
 958         stat_pipe = fds[1];
 959 success:
 960         para_fd_set(stat_pipe, rfds, max_fileno);
 961 }
 962
 963 #define COMMAND_BUF_SIZE 32768
 964
 965 /*
 966  * This is the core select loop. Besides the (internal) signal
 967  * pipe, the following other fds are checked according to the mode:
 968  *
 969  * GETCH_MODE: check stdin, return when key is pressed
 970  *
 971  * COMMAND_MODE: check command fds and stdin. Return when peer has closed both
 972  * stdout and stderr or when any key is pressed.
 973  *
 974  * EXTERNAL_MODE: Check only signal pipe. Used when an external command
 975  * is running. During that time curses is disabled.  Returns when
 976  * cmd_pid == 0.
 977  */
 978 static int do_select(int mode)
 979 {
 980         fd_set rfds;
 981         int ret, i, max_fileno;
 982         char command_buf[2][COMMAND_BUF_SIZE] = {"", ""};
 983         int cbo[2] = {0, 0}; /* command buf offsets */
 984         struct timeval tv;
 985
 986 repeat:
 987         tv.tv_sec = conf.timeout_arg  / 1000;
 988         tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
 989 //      ret = refresh_status();
 990         FD_ZERO(&rfds);
 991         max_fileno = 0;
 992         status_pre_select(&rfds, &max_fileno, &tv);
 993         /* signal pipe */
 994         para_fd_set(signal_pipe, &rfds, &max_fileno);
 995         /* command pipe only for COMMAND_MODE */
 996         if (mode == COMMAND_MODE) {
 997                 if (command_fds[0] >= 0)
 998                         para_fd_set(command_fds[0], &rfds, &max_fileno);
 999                 if (command_fds[1] >= 0)
1000                         para_fd_set(command_fds[1], &rfds, &max_fileno);
1001         }
1002         if (mode == GETCH_MODE || mode == COMMAND_MODE)
1003                 para_fd_set(STDIN_FILENO, &rfds, &max_fileno);
1004         ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
1005         if (ret <= 0)
1006                 goto check_return; /* skip fd checks */
1007         /* signals */
1008         ret = para_next_signal(&rfds);
1009         if (ret > 0)
1010                 handle_signal(ret);
1011         /* read command pipe if ready */
1012         if (mode == COMMAND_MODE) {
1013                 for (i = 0; i < 2; i++) {
1014                         size_t sz;
1015                         if (command_fds[i] < 0)
1016                                 continue;
1017                         ret = read_nonblock(command_fds[i],
1018                                 command_buf[i] + cbo[i],
1019                                 COMMAND_BUF_SIZE - 1 - cbo[i], &rfds, &sz);
1020                         cbo[i] += sz;
1021                         sz = cbo[i];
1022                         cbo[i] = for_each_line(0, command_buf[i], cbo[i],
1023                                 add_output_line, &i);
1024                         if (sz != cbo[i])
1025                                 wrefresh(bot.win);
1026                         if (ret < 0) {
1027                                 PARA_NOTICE_LOG("closing command fd %d: %s",
1028                                         i, para_strerror(-ret));
1029                                 close(command_fds[i]);
1030                                 command_fds[i] = -1;
1031                                 if (command_fds[!i] < 0) /* both fds closed */
1032                                         return 0;
1033                         }
1034                         if (cbo[i] == COMMAND_BUF_SIZE - 1) {
1035                                 PARA_NOTICE_LOG("discarding overlong line");
1036                                 cbo[i] = 0;
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 (command_fds[0] >= 0) {
1057                                 close(command_fds[0]);
1058                                 command_fds[0] = -1;
1059                         }
1060                         if (command_fds[1] >= 0) {
1061                                 close(command_fds[1]);
1062                                 command_fds[1] = -1;
1063                         }
1064                         if (cmd_pid)
1065                                 kill(cmd_pid, SIGTERM);
1066                         return -1;
1067                 }
1068                 break;
1069         case GETCH_MODE:
1070                 ret = wgetch(top.win);
1071                 if (ret != ERR && ret != KEY_RESIZE)
1072                         return ret;
1073                 break;
1074         case EXTERNAL_MODE:
1075                 if (cmd_pid == 0)
1076                         return 0;
1077         }
1078         goto repeat;
1079 }
1080
1081 /*
1082  * read from command pipe and print data to bot window
1083  */
1084 static void send_output(void)
1085 {
1086         int ret;
1087
1088         ret = mark_fd_nonblocking(command_fds[0]);
1089         if (ret < 0)
1090                 goto fail;
1091         ret = mark_fd_nonblocking(command_fds[1]);
1092         if (ret < 0)
1093                 goto fail;
1094         if (do_select(COMMAND_MODE) >= 0)
1095                 PARA_INFO_LOG("command complete");
1096         else
1097                 PARA_NOTICE_LOG("command aborted");
1098         print_in_bar(COLOR_MSG, " ");
1099         return;
1100 fail:
1101         PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1102         close(command_fds[0]);
1103         close(command_fds[1]);
1104 }
1105
1106 static void para_cmd(char *cmd)
1107 {
1108         int ret, fds[3] = {0, 1, 1};
1109         char *c = make_message(BINDIR "/para_client -- %s", cmd);
1110
1111         outputf(COLOR_COMMAND, "%s", c);
1112         print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1113         ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
1114         free(c);
1115         if (ret < 0)
1116                 return;
1117         command_fds[0] = fds[1];
1118         command_fds[1] = fds[2];
1119         send_output();
1120 }
1121
1122 /*
1123  * exec command and print output to bot win
1124  */
1125 static void display_cmd(char *cmd)
1126 {
1127         int fds[3] = {0, 1, 1};
1128
1129         print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1130         outputf(COLOR_COMMAND, "%s", cmd);
1131         if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1132                 return;
1133         command_fds[0] = fds[1];
1134         command_fds[1] = fds[2];
1135         send_output();
1136 }
1137
1138 /*
1139  * shutdown curses and stat pipe before executing external commands
1140  */
1141 static void external_cmd(char *cmd)
1142 {
1143         int fds[3] = {-1, -1, -1};
1144
1145         if (cmd_pid)
1146                 return;
1147         shutdown_curses();
1148         if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1149                 return;
1150         do_select(EXTERNAL_MODE);
1151         init_curses();
1152 }
1153
1154 static void print_scroll_msg(void)
1155 {
1156         unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1157         int first_rbe = first_visible_rbe(&lines_total);
1158         print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1159                 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1160 }
1161
1162 static void com_scroll_top(void)
1163 {
1164         int i = RINGBUFFER_SIZE - 1;
1165         unsigned lines = 0;
1166
1167         while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1168                 i--;
1169         /* i is oldest entry */
1170         for (; lines < bot.lines && i >= 0; i--) {
1171                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1172                 if (!rbe)
1173                         break;
1174                 lines += NUM_LINES(strlen(rbe->msg));
1175         }
1176         i++;
1177         if (lines > 0 && scroll_position != i) {
1178                 scroll_position = i;
1179                 redraw_bot_win();
1180                 print_scroll_msg();
1181                 return;
1182         }
1183         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1184 }
1185
1186 static void com_cancel_scrolling(void)
1187 {
1188
1189         if (scroll_position == 0) {
1190                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1191                 return;
1192         }
1193         scroll_position = 0;
1194         redraw_bot_win();
1195 }
1196
1197 static void com_page_down(void)
1198 {
1199         unsigned lines = 0;
1200         int i = scroll_position;
1201         while (lines < bot.lines && --i > 0) {
1202                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1203                 if (!rbe)
1204                         break;
1205                 lines += NUM_LINES(strlen(rbe->msg));
1206         }
1207         if (lines) {
1208                 scroll_position = i;
1209                 redraw_bot_win();
1210                 print_scroll_msg();
1211                 return;
1212         }
1213         print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1214 }
1215
1216 static void com_page_up(void)
1217 {
1218         unsigned lines;
1219         int fvr = first_visible_rbe(&lines);
1220
1221         if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1222                 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1223                 return;
1224         }
1225         scroll_position = fvr + 1;
1226         for (; scroll_position > 0; scroll_position--) {
1227                 first_visible_rbe(&lines);
1228                 if (lines == bot.lines)
1229                         break;
1230         }
1231         redraw_bot_win();
1232         print_scroll_msg();
1233 }
1234
1235 static void com_scroll_down(void)
1236 {
1237         struct rb_entry *rbe;
1238         int rbe_lines;
1239
1240         if (!scroll_position) {
1241                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1242                 return;
1243         }
1244         scroll_position--;
1245         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1246         rbe_lines = NUM_LINES(rbe->len);
1247         wscrl(bot.win, rbe_lines);
1248         wmove(bot.win, bot.lines - rbe_lines, 0);
1249         wattron(bot.win, COLOR_PAIR(rbe->color));
1250         waddstr(bot.win, rbe->msg);
1251         wrefresh(bot.win);
1252         print_scroll_msg();
1253 }
1254
1255 static void com_scroll_up(void)
1256 {
1257         struct rb_entry *rbe = NULL;
1258         unsigned lines;
1259         int i, first_rbe, num_scroll;
1260
1261         /* the entry that is going to vanish */
1262         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1263         if (!rbe)
1264                 goto err_out;
1265         num_scroll = NUM_LINES(rbe->len);
1266         first_rbe = first_visible_rbe(&lines);
1267         if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1268                 goto err_out;
1269         scroll_position++;
1270         wscrl(bot.win, -num_scroll);
1271         i = draw_top_rbe(&lines);
1272         if (i < 0)
1273                 goto err_out;
1274         while (i > 0 && lines < num_scroll) {
1275                 int rbe_lines;
1276                 rbe = ringbuffer_get(bot_win_rb, --i);
1277                 if (!rbe)
1278                         break;
1279                 rbe_lines = NUM_LINES(rbe->len);
1280                 lines += rbe_lines;
1281 //              fprintf(stderr, "msg: %s\n", rbe->msg);
1282                 wattron(bot.win, COLOR_PAIR(rbe->color));
1283                 waddstr(bot.win, "\n");
1284                 waddstr(bot.win, rbe->msg);
1285                 if (!i)
1286                         break;
1287                 i--;
1288         }
1289         wrefresh(bot.win);
1290         print_scroll_msg();
1291         return;
1292 err_out:
1293         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1294 }
1295
1296 static void com_ll_decr(void)
1297 {
1298         if (loglevel <= LL_DEBUG) {
1299                 print_in_bar(COLOR_ERRMSG,
1300                         "loglevel already at maximal verbosity\n");
1301                 return;
1302         }
1303         loglevel--;
1304         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1305 }
1306
1307 static void com_ll_incr(void)
1308 {
1309         if (loglevel >= LL_EMERG) {
1310                 print_in_bar(COLOR_ERRMSG,
1311                         "loglevel already at minimal verbosity\n");
1312                 return;
1313         }
1314         loglevel++;
1315         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1316 }
1317
1318 /*
1319  * reread configuration, terminate on errors
1320  */
1321 static void com_reread_conf(void)
1322 {
1323         char *cf =configfile_exists();
1324         struct gui_cmdline_parser_params params = {
1325                 .override = 1,
1326                 .initialize = 1,
1327                 .check_required = 0,
1328                 .check_ambiguity = 0,
1329                 .print_errors = 0,
1330         };
1331
1332         if (!cf) {
1333                 PARA_WARNING_LOG("there is no configuration to read");
1334                 return;
1335         }
1336         PARA_INFO_LOG("rereading command line options and config file");
1337         gui_cmdline_parser_ext(_argc, _argv, &conf, &params);
1338         if (gui_cmdline_parser_config_file(cf, &conf, &params) != 0) {
1339                 PARA_EMERG_LOG("errors in config file");
1340                 finish(EXIT_FAILURE);
1341         }
1342         PARA_NOTICE_LOG("config file reloaded");
1343         if (check_key_map_args() < 0)
1344                 finish(EXIT_FAILURE);
1345 }
1346
1347 static void com_help(void)
1348 {
1349         int i;
1350
1351         for (i = 0; i < conf.key_map_given; ++i) {
1352                 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1353                 const char *handler_text = "???", *desc = NULL;
1354
1355                 if (!split_key_map(tmp, &handler, &arg)) {
1356                         free(tmp);
1357                         return;
1358                 }
1359                 switch (*handler) {
1360                         case 'i':
1361                                 handler_text = "internal";
1362                                 desc = command_list[find_cmd_byname(arg)].description;
1363                                 break;
1364                         case 'x': handler_text = "external"; break;
1365                         case 'd': handler_text = "display "; break;
1366                         case 'p': handler_text = "para    "; break;
1367                 }
1368                 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1369                         strlen(arg) < 8? "\t" : "",
1370                         desc? desc : "");
1371                 free(tmp);
1372         }
1373         for (i = 0; command_list[i].handler; i++) {
1374                 struct gui_command gc = command_list[i];
1375
1376                 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1377                         strlen(gc.name) < 8? "\t" : "",
1378                         gc.description);
1379         }
1380         print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1381                 "for more info");
1382 }
1383
1384 static void com_shrink_top_win(void)
1385 {
1386         if (top.lines <= theme.top_lines_min) {
1387                 PARA_WARNING_LOG("can not decrease top window");
1388                 return;
1389         }
1390         init_wins(top.lines - 1);
1391         wclear(top.win);
1392         print_all_items();
1393         print_in_bar(COLOR_MSG, "%s", "decreased top window");
1394 }
1395
1396 static void com_enlarge_top_win(void)
1397 {
1398         if (bot.lines < 3) {
1399                 PARA_WARNING_LOG("can not increase top window");
1400                 return;
1401         }
1402         init_wins(top.lines + 1);
1403         wclear(top.win);
1404         print_all_items();
1405         print_in_bar(COLOR_MSG, "increased top window");
1406 }
1407
1408 static void com_version(void)
1409 {
1410         print_in_bar(COLOR_MSG, "para_gui " PACKAGE_VERSION " \""
1411                 CODENAME "\"");
1412 }
1413
1414 __noreturn static void com_quit(void)
1415 {
1416         finish(0);
1417 }
1418
1419 static void com_refresh(void)
1420 {
1421         shutdown_curses();
1422         init_curses();
1423 }
1424
1425 static void change_theme(int next)
1426 {
1427         if (next)
1428                 next_theme(&theme);
1429         else
1430                 prev_theme(&theme);
1431         /* This seems to be needed twice, why? */
1432         com_refresh();
1433         com_refresh();
1434         PARA_NOTICE_LOG("new theme: %s", theme.name);
1435 }
1436
1437 static void com_next_theme(void)
1438 {
1439         change_theme(1);
1440 }
1441
1442 static void com_prev_theme(void)
1443 {
1444         change_theme(0);
1445 }
1446
1447
1448 static void handle_command(int c)
1449 {
1450         int i;
1451
1452         /* first check user's key bindings */
1453         for (i = 0; i < conf.key_map_given; ++i) {
1454                 char *tmp, *handler, *arg;
1455
1456                 tmp = para_strdup(conf.key_map_arg[i]);
1457                 if (!split_key_map(tmp, &handler, &arg)) {
1458                         free(tmp);
1459                         return;
1460                 }
1461                 if (strcmp(tmp, km_keyname(c))) {
1462                         free(tmp);
1463                         continue;
1464                 }
1465                 if (*handler == 'd')
1466                         display_cmd(arg);
1467                 else if (*handler == 'x')
1468                         external_cmd(arg);
1469                 else if (*handler == 'p')
1470                         para_cmd(arg);
1471                 else if (*handler == 'i') {
1472                         int num = find_cmd_byname(arg);
1473                         if (num >= 0)
1474                                 command_list[num].handler();
1475                 }
1476                 free(tmp);
1477                 return;
1478         }
1479         /* not found, check internal key bindings */
1480         for (i = 0; command_list[i].handler; i++) {
1481                 if (!strcmp(km_keyname(c), command_list[i].key)) {
1482                         command_list[i].handler();
1483                         return;
1484                 }
1485         }
1486         print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1487                 km_keyname(c));
1488 }
1489
1490 int main(int argc, char *argv[])
1491 {
1492         int ret;
1493         char *cf;
1494
1495         _argc = argc;
1496         _argv = argv;
1497
1498         gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
1499         HANDLE_VERSION_FLAG("gui", conf);
1500         cf = configfile_exists();
1501         if (!cf && conf.config_file_given) {
1502                 fprintf(stderr, "can not read config file %s\n",
1503                         conf.config_file_arg);
1504                 exit(EXIT_FAILURE);
1505         }
1506         if (cf) {
1507                 struct gui_cmdline_parser_params params = {
1508                         .override = 0,
1509                         .initialize = 0,
1510                         .check_required = 0,
1511                         .check_ambiguity = 0,
1512                         .print_errors = 1,
1513                 };
1514                 if (gui_cmdline_parser_config_file(cf, &conf, &params) != 0)
1515                         exit(EXIT_FAILURE);
1516         }
1517         loglevel = get_loglevel_by_name(conf.loglevel_arg);
1518         if (check_key_map_args() < 0) {
1519                 fprintf(stderr, "invalid key map\n");
1520                 exit(EXIT_FAILURE);
1521         }
1522         init_theme_or_die(conf.theme_arg, &theme);
1523         top.lines = theme.top_lines_default;
1524         setup_signal_handling();
1525         bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1526         initscr(); /* needed only once, always successful */
1527         init_curses();
1528         print_welcome();
1529         for (;;) {
1530                 print_status_bar();
1531                 ret = do_select(GETCH_MODE);
1532                 if (!ret)
1533                         continue;
1534                 print_in_bar(COLOR_MSG, " ");
1535                 handle_command(ret);
1536         }
1537 }