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
  14 #include "gui.cmdline.h"
  15 #include "para.h"
  16 #include "gui.h"
  17 #include "string.h"
  18 #include "ringbuffer.h"
  19 #include "fd.h"
  20 #include "error.h"
  21 #include "list.h"
  22 #include "sched.h"
  23 #include "signal.h"
  24 #include "version.h"
  25
  26 /** define the array of error lists needed by para_gui */
  27 INIT_GUI_ERRLISTS;
  28 static char *stat_content[NUM_STAT_ITEMS];
  29
  30 #define STANDARD_STATUS_BAR "para_gui " PACKAGE_VERSION " (hit ? for help)"
  31
  32 static int signal_pipe;
  33
  34 static struct win_data {
  35         WINDOW *win;
  36         size_t begx;
  37         size_t begy;
  38         size_t cols;
  39         size_t lines;
  40 } top, bot, sb, in, sep;
  41
  42 #define RINGBUFFER_SIZE 512
  43 struct rb_entry {
  44         char *msg;
  45         size_t len;
  46         int color;
  47 };
  48 static struct ringbuffer *bot_win_rb;
  49 #define NUM_LINES(len) (1 + (len) / bot.cols)
  50
  51 static unsigned scroll_position;
  52
  53 static int cmd_died, curses_active;
  54 static pid_t cmd_pid;
  55
  56 static int command_fds[2];
  57 static int stat_pipe = -1;
  58 static struct gui_args_info conf;
  59
  60 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
  61
  62
  63 #define COLOR_STATUSBAR 52
  64 #define COLOR_COMMAND 53
  65 #define COLOR_OUTPUT 54
  66 #define COLOR_MSG 55
  67 #define COLOR_ERRMSG 56
  68 #define COLOR_WELCOME 57
  69 #define COLOR_SEPARATOR 58
  70 #define COLOR_TOP 59
  71 #define COLOR_BOT 60
  72
  73 struct gui_command {
  74         const char *key;
  75         const char *name;
  76         const char *description;
  77         void (*handler)(void);
  78 };
  79
  80 struct stat_item {
  81         char name[MAXLINE];
  82         char prefix[MAXLINE];
  83         char postfix[MAXLINE];
  84         unsigned y;
  85         unsigned x;
  86         unsigned len;
  87         int fg, bg;
  88         int align;
  89         char content[MAXLINE];
  90 };
  91
  92 static struct gui_theme theme;
  93
  94 static int _argc;
  95 static char **_argv;
  96
  97 static void com_help(void);
  98 static void com_reread_conf(void);
  99 static void com_enlarge_top_win(void);
 100 static void com_shrink_top_win(void);
 101 static void com_version(void);
 102 __noreturn static void com_quit(void);
 103 static void com_refresh(void);
 104 static void com_ll_incr(void);
 105 static void com_ll_decr(void);
 106 static void com_prev_theme(void);
 107 static void com_next_theme(void);
 108 static void com_scroll_up(void);
 109 static void com_scroll_down(void);
 110 static void com_page_up(void);
 111 static void com_page_down(void);
 112 static void com_cancel_scrolling(void);
 113 static void com_scroll_top(void);
 114
 115 static struct gui_command command_list[] = {
 116         {
 117                 .key = "?",
 118                 .name = "help",
 119                 .description = "print help",
 120                 .handler = com_help
 121         }, {
 122                 .key = "+",
 123                 .name = "enlarge_win",
 124                 .description = "enlarge the top window",
 125                 .handler = com_enlarge_top_win
 126         }, {
 127                 .key = "-",
 128                 .name = "shrink_win",
 129                 .description = "shrink the top window",
 130                 .handler = com_shrink_top_win
 131         }, {
 132                 .key = "r",
 133                 .name = "reread_conf",
 134                 .description = "reread configuration file",
 135                 .handler = com_reread_conf
 136         }, {
 137                 .key = "q",
 138                 .name = "quit",
 139                 .description = "exit para_gui",
 140                 .handler = com_quit
 141         }, {
 142                 .key = "^L",
 143                 .name = "refresh",
 144                 .description = "redraw the screen",
 145                 .handler = com_refresh
 146         }, {
 147                 .key = ".",
 148                 .name = "next_theme",
 149                 .description = "switch to next theme",
 150                 .handler = com_next_theme
 151         }, {
 152                 .key = ",",
 153                 .name = "prev_theme",
 154                 .description = "switch to previous stream",
 155                 .handler = com_prev_theme
 156         }, {
 157                 .key = ">",
 158                 .name = "ll_incr",
 159                 .description = "increase loglevel (decreases verbosity)",
 160                 .handler = com_ll_incr
 161         }, {
 162                 .key = "<",
 163                 .name = "ll_decr",
 164                 .description = "decrease loglevel (increases verbosity)",
 165                 .handler = com_ll_decr
 166         }, {
 167                 .key = "V",
 168                 .name = "version",
 169                 .description = "show the para_gui version",
 170                 .handler = com_version
 171         }, {
 172                 .key = "<up>",
 173                 .name = "scroll_up",
 174                 .description = "scroll up one line",
 175                 .handler = com_scroll_up
 176         }, {
 177                 .key = "<down>",
 178                 .name = "scroll_down",
 179                 .description = "scroll down one line",
 180                 .handler = com_scroll_down
 181         }, {
 182                 .key = "<ppage>",
 183                 .name = "page_up",
 184                 .description = "scroll up one page",
 185                 .handler = com_page_up
 186         }, {
 187                 .key = "<npage>",
 188                 .name = "page_down",
 189                 .description = "scroll down one page",
 190                 .handler = com_page_down
 191         }, {
 192                 .key = "<home>",
 193                 .name = "scroll_top",
 194                 .description = "scroll to top of buffer",
 195                 .handler = com_scroll_top
 196         }, {
 197                 .key = "<end>",
 198                 .name = "cancel_scroll",
 199                 .description = "deactivate scroll mode",
 200                 .handler = com_cancel_scrolling
 201         }, {
 202                 .handler = NULL
 203         }
 204 };
 205
 206 static int find_cmd_byname(char *name)
 207 {
 208         int i;
 209
 210         for (i = 0; command_list[i].handler; i++)
 211                 if (!strcmp(command_list[i].name, name))
 212                         return i;
 213         return -1;
 214 }
 215
 216 /* taken from mutt */
 217 static char *km_keyname(int c)
 218 {
 219         static char buf[10];
 220
 221         if (c == KEY_UP) {
 222                 sprintf(buf, "<up>");
 223                 return buf;
 224         }
 225         if (c == KEY_DOWN) {
 226                 sprintf(buf, "<down>");
 227                 return buf;
 228         }
 229         if (c == KEY_LEFT) {
 230                 sprintf(buf, "<left>");
 231                 return buf;
 232         }
 233         if (c == KEY_RIGHT) {
 234                 sprintf(buf, "<right>");
 235                 return buf;
 236         }
 237         if (c == KEY_NPAGE) {
 238                 sprintf(buf, "<npage>");
 239                 return buf;
 240         }
 241         if (c == KEY_PPAGE) {
 242                 sprintf(buf, "<ppage>");
 243                 return buf;
 244         }
 245         if (c == KEY_HOME) {
 246                 sprintf(buf, "<home>");
 247                 return buf;
 248         }
 249         if (c == KEY_END) {
 250                 sprintf(buf, "<end>");
 251                 return buf;
 252         }
 253         if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
 254                 if (c < 0)
 255                         c += 256;
 256                 if (c < 128) {
 257                         buf[0] = '^';
 258                         buf[1] = (c + '@') & 0x7f;
 259                         buf[2] = 0;
 260                 } else
 261                         snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
 262                                 (c >> 3) & 7, c & 7);
 263         } else if (c >= KEY_F0 && c < KEY_F(256))
 264                 sprintf(buf, "<F%d>", c - KEY_F0);
 265         else if (isprint(c))
 266                 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
 267         else
 268                 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
 269         return buf;
 270 }
 271
 272 static char *configfile_exists(void)
 273 {
 274         static char *config_file;
 275         char *tmp;
 276
 277         if (!conf.config_file_given) {
 278                 if (!config_file) {
 279                         char *home = para_homedir();
 280                         config_file = make_message("%s/.paraslash/gui.conf",
 281                                 home);
 282                         free(home);
 283                 }
 284                 tmp = config_file;
 285         } else
 286                 tmp = conf.config_file_arg;
 287         return file_exists(tmp)? tmp: NULL;
 288 }
 289
 290 /*
 291  * print num spaces to curses window
 292  */
 293 static void add_spaces(WINDOW* win, unsigned int num)
 294 {
 295         while (num > 0) {
 296                 num--;
 297                 waddstr(win, " ");
 298         }
 299 }
 300
 301 /*
 302  * print aligned string to curses window. This function always prints
 303  * exactly len chars.
 304  */
 305 static int align_str(WINDOW* win, char *str, unsigned int len,
 306                 unsigned int align)
 307 {
 308         int i, num; /* of spaces */
 309
 310         if (!win || !str)
 311                 return -1;
 312         num = len - strlen(str);
 313         if (num < 0) {
 314                 str[len] = '\0';
 315                 num = 0;
 316         }
 317         /* replace control characters by spaces */
 318         for (i = 0; i < len && str[i]; i++) {
 319                 if (str[i] == '\n' || str[i] == '\r' || str[i] == '\f')
 320                         str[i] = ' ';
 321         }
 322         if (align == LEFT) {
 323                 waddstr(win, str);
 324                 add_spaces(win, num);
 325         } else if (align == RIGHT) {
 326                 add_spaces(win, num);
 327                 waddstr(win, str);
 328         } else {
 329                 add_spaces(win, num / 2);
 330                 waddstr(win, str[0]? str: "");
 331                 add_spaces(win, num - num / 2);
 332         }
 333         return 1;
 334 }
 335
 336 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
 337 {
 338         char *msg;
 339         va_list ap;
 340
 341         if (!curses_active)
 342                 return;
 343         wattron(in.win, COLOR_PAIR(color));
 344         va_start(ap, fmt);
 345         xvasprintf(&msg, fmt, ap);
 346         va_end(ap);
 347         wmove(in.win, 0, 0);
 348         align_str(in.win, msg, sb.cols, LEFT);
 349         free(msg);
 350         wrefresh(in.win);
 351 }
 352
 353 /*
 354  * update the status bar
 355  */
 356 static void print_status_bar(void)
 357 {
 358         char *tmp;
 359
 360         if (!curses_active)
 361                 return;
 362         tmp = para_strdup(STANDARD_STATUS_BAR);
 363         wmove(sb.win, 0, 0);
 364         align_str(sb.win, tmp, sb.cols, CENTER);
 365         free(tmp);
 366         wrefresh(sb.win);
 367 }
 368
 369 /*
 370  * get the number of the oldest rbe that is (partially) visible. On return,
 371  * lines contains the sum of the number of lines of all visable entries. If the
 372  * first one is only partially visible, lines is greater than bot.lines.
 373  */
 374 static int first_visible_rbe(unsigned *lines)
 375 {
 376         int i;
 377         *lines = 0;
 378         for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
 379                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
 380                 int rbe_lines;
 381                 if (!rbe)
 382                         return i - 1;
 383 //              fprintf(stderr, "found: %s\n", rbe->msg);
 384                 rbe_lines = NUM_LINES(rbe->len);
 385                 if (rbe_lines > bot.lines)
 386                         return -1;
 387                 *lines += rbe_lines;
 388                 if (*lines >= bot.lines)
 389                         return i;
 390         }
 391         return RINGBUFFER_SIZE - 1;
 392 }
 393
 394 static int draw_top_rbe(unsigned *lines)
 395 {
 396         unsigned len;
 397         int offset, fvr = first_visible_rbe(lines);
 398         struct rb_entry *rbe;
 399
 400         if (fvr < 0)
 401                 return -1;
 402         wmove(bot.win, 0, 0);
 403         rbe = ringbuffer_get(bot_win_rb, fvr);
 404         if (!rbe)
 405                 return -1;
 406         len = strlen(rbe->msg);
 407         if (*lines > bot.lines) {
 408                 /* first rbe is only partially visible */
 409                 offset = (*lines - bot.lines) * bot.cols;
 410                 assert(offset <= len);
 411         } else
 412                 offset = 0;
 413         wattron(bot.win, COLOR_PAIR(rbe->color));
 414         waddstr(bot.win, rbe->msg + offset);
 415         *lines = NUM_LINES(len - offset);
 416         return fvr;
 417 }
 418
 419 static void redraw_bot_win(void)
 420 {
 421         unsigned lines;
 422         int i;
 423
 424         wmove(bot.win, 0, 0);
 425         wclear(bot.win);
 426         i = draw_top_rbe(&lines);
 427         if (i <= 0)
 428                 goto out;
 429         while (i > 0 && lines < bot.lines) {
 430                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
 431                 if (!rbe) {
 432                         lines++;
 433                         waddstr(bot.win, "\n");
 434                         continue;
 435                 }
 436                 lines += NUM_LINES(rbe->len);
 437                 wattron(bot.win, COLOR_PAIR(rbe->color));
 438                 waddstr(bot.win, "\n");
 439                 waddstr(bot.win, rbe->msg);
 440         }
 441 out:
 442         wrefresh(bot.win);
 443 }
 444
 445 static void rb_add_entry(int color, char *msg)
 446 {
 447         struct rb_entry *old, *new = para_malloc(sizeof(struct rb_entry));
 448         int x, y;
 449         new->color = color;
 450         new->len = strlen(msg);
 451         new->msg = msg;
 452         old = ringbuffer_add(bot_win_rb, new);
 453 //      fprintf(stderr, "added: %s\n", new->msg);
 454         if (old) {
 455                 free(old->msg);
 456                 free(old);
 457         }
 458         if (scroll_position) {
 459                 /* discard current scrolling, like xterm does */
 460                 scroll_position = 0;
 461                 redraw_bot_win();
 462                 return;
 463         }
 464         wattron(bot.win, COLOR_PAIR(color));
 465         getyx(bot.win, y, x);
 466         if (y || x)
 467                 waddstr(bot.win, "\n");
 468         waddstr(bot.win, msg);
 469 }
 470
 471 /*
 472  * print formated output to bot win and refresh
 473  */
 474 __printf_2_3 static void outputf(int color, const char* fmt,...)
 475 {
 476         char *msg;
 477         va_list ap;
 478
 479         if (!curses_active)
 480                 return;
 481         va_start(ap, fmt);
 482         xvasprintf(&msg, fmt, ap);
 483         va_end(ap);
 484         rb_add_entry(color, msg);
 485         wrefresh(bot.win);
 486 }
 487
 488 static int add_output_line(char *line, void *data)
 489 {
 490         int color = *(int *)data? COLOR_ERRMSG : COLOR_OUTPUT;
 491         if (!curses_active)
 492                 return 1;
 493         rb_add_entry(color, para_strdup(line));
 494         return 1;
 495 }
 496
 497 static int loglevel;
 498
 499 __printf_2_3 void curses_log(int ll, const char *fmt,...)
 500 {
 501         int color;
 502         char *msg;
 503         va_list ap;
 504
 505         if (ll < loglevel || !curses_active)
 506                 return;
 507         switch (ll) {
 508                 case LL_DEBUG:
 509                 case LL_INFO:
 510                 case LL_NOTICE:
 511                         color = COLOR_MSG;
 512                         break;
 513                 default:
 514                         color = COLOR_ERRMSG;
 515         }
 516         va_start(ap, fmt);
 517         xvasprintf(&msg, fmt, ap);
 518         va_end(ap);
 519         chop(msg);
 520         rb_add_entry(color, msg);
 521         wrefresh(bot.win);
 522 }
 523 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
 524
 525 static void setup_signal_handling(void)
 526 {
 527         signal_pipe = para_signal_init();
 528         para_install_sighandler(SIGINT);
 529         para_install_sighandler(SIGTERM);
 530         para_install_sighandler(SIGCHLD);
 531         para_install_sighandler(SIGWINCH);
 532         para_install_sighandler(SIGUSR1);
 533         para_sigaction(SIGHUP, SIG_IGN);
 534 }
 535
 536 __noreturn static void do_exit(int ret)
 537 {
 538         para_sigaction(SIGTERM, SIG_IGN);
 539         kill(0, SIGTERM);
 540         exit(ret);
 541 }
 542
 543 static void shutdown_curses(void)
 544 {
 545         if (!curses_active)
 546                 return;
 547         def_prog_mode();
 548         curses_active = 0;
 549         endwin();
 550 }
 551
 552 __noreturn static void finish(int ret)
 553 {
 554         shutdown_curses();
 555         do_exit(ret);
 556 }
 557
 558 /*
 559  * exit curses and print given message to stdout/stderr
 560  */
 561 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
 562 {
 563         va_list argp;
 564         FILE *outfd = ret? stderr: stdout;
 565
 566         shutdown_curses();
 567         va_start(argp, fmt);
 568         vfprintf(outfd, fmt, argp);
 569         va_end(argp);
 570         do_exit(ret);
 571 }
 572
 573 static void print_welcome(void)
 574 {
 575         if (loglevel > LL_NOTICE)
 576                 return;
 577         outputf(COLOR_WELCOME, "Welcome to para_gui " PACKAGE_VERSION
 578                 " \"" CODENAME "\". Theme: %s", theme.name);
 579         wclrtoeol(bot.win);
 580 }
 581
 582 /*
 583  * init all windows
 584  */
 585 static void init_wins(int top_lines)
 586 {
 587         int i;
 588
 589         top.lines = top_lines;
 590         top.cols = COLS;
 591         top.begy = 0;
 592         top.begx = 0;
 593
 594         bot.lines = LINES - top.lines - 3;
 595         bot.cols = COLS;
 596         bot.begy = top.lines + 1;
 597         bot.begx = 0;
 598
 599         sb.lines = 1;
 600         sb.cols = COLS;
 601         sb.begy = LINES - 2;
 602         sb.begx = 0;
 603
 604         in.lines = 1;
 605         in.cols = COLS;
 606         in.begy = LINES - 1;
 607         in.begx = 0;
 608
 609         sep.lines = 1;
 610         sep.cols = COLS;
 611         sep.begy = top.lines;
 612         sep.begx = 0;
 613
 614         assume_default_colors(theme.default_fg, theme.default_bg);
 615         if (top.win) {
 616                 mvwin(top.win, top.begy, top.begx);
 617                 wresize(top.win, top.lines, top.cols);
 618
 619                 mvwin(sb.win, sb.begy, sb.begx);
 620                 wresize(sb.win, sb.lines, sb.cols);
 621
 622                 mvwin(sep.win, sep.begy, sep.begx);
 623                 wresize(sep.win, sep.lines, sep.cols);
 624
 625                 mvwin(bot.win, bot.begy, bot.begx);
 626                 wresize(bot.win, bot.lines, bot.cols);
 627
 628                 mvwin(in.win, in.begy, in.begx);
 629                 wresize(in.win, in.lines, in.cols);
 630         } else {
 631                 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
 632                 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
 633                 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
 634                 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
 635                 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
 636                 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
 637                         msg_n_exit(1, "Error: Cannot create curses windows\n");
 638                 wclear(bot.win);
 639                 wclear(sb.win);
 640                 wclear(in.win);
 641                 scrollok(bot.win, 1);
 642                 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
 643                 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
 644                 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
 645                 wattron(top.win, COLOR_PAIR(COLOR_TOP));
 646                 nodelay(top.win, 1);
 647                 nodelay(bot.win, 1);
 648                 nodelay(sb.win, 1);
 649                 nodelay(in.win, 0);
 650
 651                 keypad(top.win, 1);
 652                 keypad(bot.win, 1);
 653                 keypad(sb.win, 1);
 654                 keypad(in.win, 1);
 655                 print_status_bar();
 656         }
 657         wmove(sep.win, 0, 0);
 658         for (i = 1; i <= COLS; i++)
 659                 waddstr(sep.win, theme.sep_str);
 660         wclear(top.win);
 661         //wclear(bot.win);
 662         wnoutrefresh(top.win);
 663         wnoutrefresh(bot.win);
 664         //wnoutrefresh(sb.win);
 665         print_status_bar();
 666         wnoutrefresh(in.win);
 667         wnoutrefresh(sep.win);
 668         doupdate();
 669 }
 670
 671 /*
 672  * Print stat item #i to curses window
 673  */
 674 static void print_stat_item(int i)
 675 {
 676         char *tmp;
 677         struct stat_item_data d = theme.data[i];
 678         char *c = stat_content[i];
 679
 680         if (!curses_active || !d.len || !c)
 681                 return;
 682         tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
 683         wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
 684         wrefresh(top.win);
 685         wattron(top.win, COLOR_PAIR(i + 1));
 686         align_str(top.win, tmp, d.len * COLS / 100, d.align);
 687         free(tmp);
 688         wrefresh(top.win);
 689 }
 690
 691 static int update_item(int item_num, char *buf)
 692 {
 693         char **c = stat_content + item_num;
 694
 695         free(*c);
 696         if (buf && buf[0])
 697                 goto dup;
 698         switch (item_num) {
 699         case SI_ARTIST:
 700                 *c = para_strdup("(artist tag not set)");
 701                 goto print;
 702         case SI_TITLE:
 703                 *c = para_strdup("(title tag not set)");
 704                 goto print;
 705         case SI_YEAR:
 706                 *c = para_strdup("????");
 707                 goto print;
 708         case SI_ALBUM:
 709                 *c = para_strdup("(album tag not set)");
 710                 goto print;
 711         case SI_COMMENT:
 712                 *c = para_strdup("(comment tag not set)");
 713                 goto print;
 714         }
 715 dup:
 716         *c = para_strdup(buf);
 717 print:
 718         print_stat_item(item_num);
 719         return 1;
 720 }
 721
 722 static int read_stat_pipe(fd_set *rfds)
 723 {
 724         static char *buf;
 725         static int bufsize, loaded;
 726         int ret, ret2;
 727         size_t sz;
 728
 729         if (stat_pipe < 0)
 730                 return 0;
 731         if (loaded >= bufsize) {
 732                 if (bufsize > 1000 * 1000) {
 733                         loaded = 0;
 734                         return 0;
 735                 }
 736                 bufsize += bufsize + 1000;
 737                 buf = para_realloc(buf, bufsize);
 738         }
 739         assert(loaded < bufsize);
 740         ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
 741                 rfds, &sz);
 742         loaded += sz;
 743         ret2 = for_each_stat_item(buf, loaded, update_item);
 744         if (ret < 0 || ret2 < 0) {
 745                 loaded = 0;
 746                 return ret2 < 0? ret2 : ret;
 747         }
 748         sz = ret2; /* what is left */
 749         if (sz > 0 && sz < loaded)
 750                 memmove(buf, buf + loaded - sz, sz);
 751         loaded = sz;
 752         return 1;
 753 }
 754
 755 static void print_all_items(void)
 756 {
 757         int i;
 758
 759         if (!curses_active)
 760                 return;
 761         FOR_EACH_STATUS_ITEM(i)
 762                 print_stat_item(i);
 763 }
 764
 765 static void clear_all_items(void)
 766 {
 767         int i;
 768
 769         FOR_EACH_STATUS_ITEM(i) {
 770                 free(stat_content[i]);
 771                 stat_content[i] = para_strdup("");
 772         }
 773 }
 774
 775 static void init_pair_or_die(short pair, short f, short b)
 776 {
 777         if (init_pair(pair, f, b) == ERR)
 778                 msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
 779 }
 780
 781 static void init_colors_or_die(void)
 782 {
 783         int i;
 784
 785         if (!has_colors())
 786                 msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
 787         if (start_color() == ERR)
 788                 msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
 789         FOR_EACH_STATUS_ITEM(i)
 790                 if (theme.data[i].len)
 791                         init_pair_or_die(i + 1, theme.data[i].fg,
 792                                 theme.data[i].bg);
 793         init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
 794         init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
 795         init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
 796         init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
 797         init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
 798         init_pair_or_die(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
 799         init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
 800         init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
 801         init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
 802 }
 803
 804 /* (Re-)initialize the curses library. */
 805 static void init_curses(void)
 806 {
 807         curses_active = 1;
 808         if (top.win && refresh() == ERR) /* refesh is really needed */
 809                 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
 810         if (LINES < theme.lines_min || COLS < theme.cols_min)
 811                 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
 812                         " (need at least %dx%d)\n", COLS, LINES,
 813                         theme.cols_min, theme.lines_min);
 814         curs_set(0); /* make cursor invisible, ignore errors */
 815         nonl(); /* do not NL->CR/NL on output, always returns OK */
 816         /* don't echo input */
 817         if (noecho() == ERR)
 818                 msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
 819         /* take input chars one at a time, no wait for \n */
 820         if (cbreak() == ERR)
 821                 msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
 822         init_colors_or_die();
 823         clear(); /* ignore non-fatal errors */
 824         init_wins(theme.top_lines_default);
 825         print_all_items();
 826         // noecho(); /* don't echo input */
 827 }
 828
 829 static void check_sigchld(void)
 830 {
 831         int ret;
 832         pid_t pid;
 833 reap_next_child:
 834         ret = para_reap_child(&pid);
 835         if (ret <= 0)
 836                 return;
 837         if (pid == cmd_pid) {
 838                 cmd_pid = 0;
 839                 cmd_died = 1;
 840         }
 841         goto reap_next_child;
 842 }
 843
 844 /*
 845  * This sucker modifies its first argument. *handler and *arg are
 846  * pointers to 0-terminated strings (inside line). Crap.
 847  */
 848 static int split_key_map(char *line, char **handler, char **arg)
 849 {
 850         if (!(*handler = strchr(line + 1, ':')))
 851                 goto err_out;
 852         **handler = '\0';
 853         (*handler)++;
 854         if (!(*arg = strchr(*handler, ':')))
 855                 goto err_out;
 856         **arg = '\0';
 857         (*arg)++;
 858         return 1;
 859 err_out:
 860         return 0;
 861 }
 862
 863 static int check_key_map_args(void)
 864 {
 865         char *s;
 866         int i, ret = -1;
 867         char *tmp = NULL, *handler, *arg;
 868
 869         for (i = 0; i < conf.key_map_given; ++i) {
 870                 s = conf.key_map_arg[i];
 871                 if (!(*s))
 872                         goto err_out;
 873                 free(tmp);
 874                 tmp = para_strdup(s);
 875                 if (!split_key_map(tmp, &handler, &arg))
 876                         goto err_out;
 877                 if (strlen(handler) != 1)
 878                         goto err_out;
 879                 if (*handler != 'x'
 880                         && *handler != 'd'
 881                         && *handler != 'i'
 882                         && *handler != 'p')
 883                         goto err_out;
 884                 if (*handler != 'i')
 885                         continue;
 886                 if (find_cmd_byname(arg) < 0)
 887                         goto err_out;
 888         }
 889         ret = 0;
 890 err_out:
 891         free(tmp);
 892         return ret;
 893 }
 894
 895 /*
 896  * React to various signal-related events
 897  */
 898 static void handle_signal(int sig)
 899 {
 900         switch (sig) {
 901         case SIGTERM:
 902                 msg_n_exit(EXIT_FAILURE,
 903                         "only the good die young (caught SIGTERM))\n");
 904                 return;
 905         case SIGWINCH:
 906                 if (curses_active) {
 907                         shutdown_curses();
 908                         init_curses();
 909                         redraw_bot_win();
 910                 }
 911                 return;
 912         case SIGINT:
 913                 PARA_WARNING_LOG("caught SIGINT, reset");
 914                 /* Nothing to do. SIGINT killed our child which gets noticed
 915                  * by do_select and resets everything.
 916                  */
 917                 return;
 918         case SIGUSR1:
 919                 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration");
 920                 com_reread_conf();
 921                 return;
 922         case SIGCHLD:
 923                 check_sigchld();
 924                 return;
 925         }
 926 }
 927
 928 static int open_stat_pipe(void)
 929 {
 930         static int init = 1;
 931         int ret, fds[3] = {0, 1, 0};
 932         pid_t pid;
 933
 934         if (init)
 935                 init = 0;
 936         else
 937                 /*
 938                  * Sleep a bit to avoid a busy loop. As the call to sleep() may
 939                  * be interrupted by SIGCHLD, we simply wait until the call
 940                  * succeeds.
 941                  */
 942                 while (sleep(2))
 943                         ; /* nothing */
 944         ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
 945         if (ret < 0)
 946                 return ret;
 947         ret = mark_fd_nonblocking(fds[1]);
 948         if (ret >= 0)
 949                 return fds[1];
 950         close(fds[1]);
 951         return ret;
 952 }
 953
 954 #define COMMAND_BUF_SIZE 32768
 955
 956 /*
 957  * This is the core select loop. Besides the (internal) signal
 958  * pipe, the following other fds are checked according to the mode:
 959  *
 960  * GETCH_MODE: check stdin, return when key is pressed
 961  *
 962  * COMMAND_MODE: check command fds and stdin. Return when peer has closed both
 963  * stdout and stderr or when any key is pressed.
 964  *
 965  * EXTERNAL_MODE: Check only signal pipe. Used when an external command
 966  * is running. During that time curses is disabled.  Returns when
 967  * cmd_pid == 0.
 968  */
 969 static int do_select(int mode)
 970 {
 971         fd_set rfds;
 972         int ret, i, max_fileno;
 973         char command_buf[2][COMMAND_BUF_SIZE] = {"", ""};
 974         int cbo[2] = {0, 0}; /* command buf offsets */
 975         struct timeval tv;
 976
 977 repeat:
 978         tv.tv_sec = conf.timeout_arg  / 1000;
 979         tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
 980 //      ret = refresh_status();
 981         FD_ZERO(&rfds);
 982         max_fileno = 0;
 983         if (stat_pipe < 0)
 984                 stat_pipe = open_stat_pipe();
 985         if (stat_pipe >= 0)
 986                 para_fd_set(stat_pipe, &rfds, &max_fileno);
 987         /* signal pipe */
 988         para_fd_set(signal_pipe, &rfds, &max_fileno);
 989         /* command pipe only for COMMAND_MODE */
 990         if (mode == COMMAND_MODE) {
 991                 if (command_fds[0] >= 0)
 992                         para_fd_set(command_fds[0], &rfds, &max_fileno);
 993                 if (command_fds[1] >= 0)
 994                         para_fd_set(command_fds[1], &rfds, &max_fileno);
 995         }
 996         if (mode == GETCH_MODE || mode == COMMAND_MODE)
 997                 para_fd_set(STDIN_FILENO, &rfds, &max_fileno);
 998         ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
 999         if (ret <= 0)
1000                 goto check_return; /* skip fd checks */
1001         /* signals */
1002         ret = para_next_signal(&rfds);
1003         if (ret > 0)
1004                 handle_signal(ret);
1005         /* read command pipe if ready */
1006         if (mode == COMMAND_MODE) {
1007                 for (i = 0; i < 2; i++) {
1008                         size_t sz;
1009                         if (command_fds[i] < 0)
1010                                 continue;
1011                         ret = read_nonblock(command_fds[i],
1012                                 command_buf[i] + cbo[i],
1013                                 COMMAND_BUF_SIZE - 1 - cbo[i], &rfds, &sz);
1014                         cbo[i] += sz;
1015                         sz = cbo[i];
1016                         cbo[i] = for_each_line(command_buf[i], cbo[i],
1017                                 add_output_line, &i);
1018                         if (sz != cbo[i])
1019                                 wrefresh(bot.win);
1020                         if (ret < 0) {
1021                                 PARA_NOTICE_LOG("closing command fd %d: %s",
1022                                         i, para_strerror(-ret));
1023                                 close(command_fds[i]);
1024                                 command_fds[i] = -1;
1025                                 if (command_fds[!i] < 0) /* both fds closed */
1026                                         return 0;
1027                         }
1028                         if (cbo[i] == COMMAND_BUF_SIZE - 1) {
1029                                 PARA_NOTICE_LOG("discarding overlong line");
1030                                 cbo[i] = 0;
1031                         }
1032                 }
1033         }
1034         ret = read_stat_pipe(&rfds);
1035         if (ret < 0) {
1036                 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1037                 close(stat_pipe);
1038                 stat_pipe = -1;
1039                 clear_all_items();
1040                 free(stat_content[SI_BASENAME]);
1041                 stat_content[SI_BASENAME] =
1042                         para_strdup("stat command terminated!?");
1043                 print_all_items();
1044         }
1045 check_return:
1046         switch (mode) {
1047         case COMMAND_MODE:
1048                 ret = wgetch(top.win);
1049                 if (ret != ERR && ret != KEY_RESIZE) {
1050                         if (command_fds[0] >= 0) {
1051                                 close(command_fds[0]);
1052                                 command_fds[0] = -1;
1053                         }
1054                         if (command_fds[1] >= 0) {
1055                                 close(command_fds[1]);
1056                                 command_fds[1] = -1;
1057                         }
1058                         if (cmd_pid)
1059                                 kill(cmd_pid, SIGTERM);
1060                         return -1;
1061                 }
1062                 break;
1063         case GETCH_MODE:
1064                 ret = wgetch(top.win);
1065                 if (ret != ERR && ret != KEY_RESIZE)
1066                         return ret;
1067                 break;
1068         case EXTERNAL_MODE:
1069                 if (cmd_died) {
1070                         cmd_died = 0;
1071                         return 0;
1072                 }
1073         }
1074         goto repeat;
1075 }
1076
1077 /*
1078  * read from command pipe and print data to bot window
1079  */
1080 static void send_output(void)
1081 {
1082         int ret;
1083
1084         ret = mark_fd_nonblocking(command_fds[0]);
1085         if (ret < 0)
1086                 goto fail;
1087         ret = mark_fd_nonblocking(command_fds[1]);
1088         if (ret < 0)
1089                 goto fail;
1090         if (do_select(COMMAND_MODE) >= 0)
1091                 PARA_INFO_LOG("command complete");
1092         else
1093                 PARA_NOTICE_LOG("command aborted");
1094         print_in_bar(COLOR_MSG, " ");
1095         return;
1096 fail:
1097         PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1098         close(command_fds[0]);
1099         close(command_fds[1]);
1100 }
1101
1102 static void para_cmd(char *cmd)
1103 {
1104         int ret, fds[3] = {0, 1, 1};
1105         char *c = make_message(BINDIR "/para_client -- %s", cmd);
1106
1107         outputf(COLOR_COMMAND, "%s", c);
1108         print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1109         ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
1110         free(c);
1111         if (ret < 0)
1112                 return;
1113         command_fds[0] = fds[1];
1114         command_fds[1] = fds[2];
1115         send_output();
1116 }
1117
1118 /*
1119  * exec command and print output to bot win
1120  */
1121 static void display_cmd(char *cmd)
1122 {
1123         int fds[3] = {0, 1, 1};
1124
1125         print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1126         outputf(COLOR_COMMAND, "%s", cmd);
1127         if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1128                 return;
1129         command_fds[0] = fds[1];
1130         command_fds[1] = fds[2];
1131         send_output();
1132 }
1133
1134 /*
1135  * shutdown curses and stat pipe before executing external commands
1136  */
1137 static void external_cmd(char *cmd)
1138 {
1139         int fds[3] = {-1, -1, -1};
1140
1141         if (cmd_pid)
1142                 return;
1143         shutdown_curses();
1144         if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1145                 return;
1146         cmd_died = 0;
1147         do_select(EXTERNAL_MODE);
1148         init_curses();
1149 }
1150
1151 static void print_scroll_msg(void)
1152 {
1153         unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1154         int first_rbe = first_visible_rbe(&lines_total);
1155         print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1156                 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1157 }
1158
1159 static void com_scroll_top(void)
1160 {
1161         int i = RINGBUFFER_SIZE - 1;
1162         unsigned lines = 0;
1163
1164         while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1165                 i--;
1166         /* i is oldest entry */
1167         for (; lines < bot.lines && i >= 0; i--) {
1168                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1169                 if (!rbe)
1170                         break;
1171                 lines += NUM_LINES(strlen(rbe->msg));
1172         }
1173         i++;
1174         if (lines > 0 && scroll_position != i) {
1175                 scroll_position = i;
1176                 redraw_bot_win();
1177                 print_scroll_msg();
1178                 return;
1179         }
1180         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1181 }
1182
1183 static void com_cancel_scrolling(void)
1184 {
1185
1186         if (scroll_position == 0) {
1187                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1188                 return;
1189         }
1190         scroll_position = 0;
1191         redraw_bot_win();
1192 }
1193
1194 static void com_page_down(void)
1195 {
1196         unsigned lines = 0;
1197         int i = scroll_position;
1198         while (lines < bot.lines && --i > 0) {
1199                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1200                 if (!rbe)
1201                         break;
1202                 lines += NUM_LINES(strlen(rbe->msg));
1203         }
1204         if (lines) {
1205                 scroll_position = i;
1206                 redraw_bot_win();
1207                 print_scroll_msg();
1208                 return;
1209         }
1210         print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1211 }
1212
1213 static void com_page_up(void)
1214 {
1215         unsigned lines;
1216         int fvr = first_visible_rbe(&lines);
1217
1218         if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1219                 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1220                 return;
1221         }
1222         scroll_position = fvr + 1;
1223         for (; scroll_position > 0; scroll_position--) {
1224                 first_visible_rbe(&lines);
1225                 if (lines == bot.lines)
1226                         break;
1227         }
1228         redraw_bot_win();
1229         print_scroll_msg();
1230 }
1231
1232 static void com_scroll_down(void)
1233 {
1234         struct rb_entry *rbe;
1235         int rbe_lines;
1236
1237         if (!scroll_position) {
1238                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1239                 return;
1240         }
1241         scroll_position--;
1242         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1243         rbe_lines = NUM_LINES(rbe->len);
1244         wscrl(bot.win, rbe_lines);
1245         wmove(bot.win, bot.lines - rbe_lines, 0);
1246         wattron(bot.win, COLOR_PAIR(rbe->color));
1247         waddstr(bot.win, rbe->msg);
1248         wrefresh(bot.win);
1249         print_scroll_msg();
1250 }
1251
1252 static void com_scroll_up(void)
1253 {
1254         struct rb_entry *rbe = NULL;
1255         unsigned lines;
1256         int i, first_rbe, num_scroll;
1257
1258         /* the entry that is going to vanish */
1259         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1260         if (!rbe)
1261                 goto err_out;
1262         num_scroll = NUM_LINES(rbe->len);
1263         first_rbe = first_visible_rbe(&lines);
1264         if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1265                 goto err_out;
1266         scroll_position++;
1267         wscrl(bot.win, -num_scroll);
1268         i = draw_top_rbe(&lines);
1269         if (i < 0)
1270                 goto err_out;
1271         while (i > 0 && lines < num_scroll) {
1272                 int rbe_lines;
1273                 rbe = ringbuffer_get(bot_win_rb, --i);
1274                 if (!rbe)
1275                         break;
1276                 rbe_lines = NUM_LINES(rbe->len);
1277                 lines += rbe_lines;
1278 //              fprintf(stderr, "msg: %s\n", rbe->msg);
1279                 wattron(bot.win, COLOR_PAIR(rbe->color));
1280                 waddstr(bot.win, "\n");
1281                 waddstr(bot.win, rbe->msg);
1282                 if (!i)
1283                         break;
1284                 i--;
1285         }
1286         wrefresh(bot.win);
1287         print_scroll_msg();
1288         return;
1289 err_out:
1290         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1291 }
1292
1293 static void com_ll_decr(void)
1294 {
1295         if (loglevel <= LL_DEBUG) {
1296                 print_in_bar(COLOR_ERRMSG,
1297                         "loglevel already at maximal verbosity\n");
1298                 return;
1299         }
1300         loglevel--;
1301         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1302 }
1303
1304 static void com_ll_incr(void)
1305 {
1306         if (loglevel >= LL_EMERG) {
1307                 print_in_bar(COLOR_ERRMSG,
1308                         "loglevel already at minimal verbosity\n");
1309                 return;
1310         }
1311         loglevel++;
1312         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1313 }
1314
1315 /*
1316  * reread configuration, terminate on errors
1317  */
1318 static void com_reread_conf(void)
1319 {
1320         char *cf =configfile_exists();
1321         struct gui_cmdline_parser_params params = {
1322                 .override = 1,
1323                 .initialize = 1,
1324                 .check_required = 0,
1325                 .check_ambiguity = 0,
1326                 .print_errors = 0,
1327         };
1328
1329         if (!cf) {
1330                 PARA_WARNING_LOG("there is no configuration to read");
1331                 return;
1332         }
1333         PARA_INFO_LOG("rereading command line options and config file");
1334         gui_cmdline_parser_ext(_argc, _argv, &conf, &params);
1335         if (gui_cmdline_parser_config_file(cf, &conf, &params) != 0) {
1336                 PARA_EMERG_LOG("errors in config file");
1337                 finish(EXIT_FAILURE);
1338         }
1339         PARA_NOTICE_LOG("config file reloaded");
1340         if (check_key_map_args() < 0)
1341                 finish(EXIT_FAILURE);
1342 }
1343
1344 static void com_help(void)
1345 {
1346         int i;
1347
1348         for (i = 0; i < conf.key_map_given; ++i) {
1349                 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1350                 const char *handler_text = "???", *desc = NULL;
1351
1352                 if (!split_key_map(tmp, &handler, &arg)) {
1353                         free(tmp);
1354                         return;
1355                 }
1356                 switch (*handler) {
1357                         case 'i':
1358                                 handler_text = "internal";
1359                                 desc = command_list[find_cmd_byname(arg)].description;
1360                                 break;
1361                         case 'x': handler_text = "external"; break;
1362                         case 'd': handler_text = "display "; break;
1363                         case 'p': handler_text = "para    "; break;
1364                 }
1365                 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1366                         strlen(arg) < 8? "\t" : "",
1367                         desc? desc : "");
1368                 free(tmp);
1369         }
1370         for (i = 0; command_list[i].handler; i++) {
1371                 struct gui_command gc = command_list[i];
1372
1373                 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1374                         strlen(gc.name) < 8? "\t" : "",
1375                         gc.description);
1376         }
1377         print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1378                 "for more info");
1379 }
1380
1381 static void com_shrink_top_win(void)
1382 {
1383         if (top.lines <= theme.top_lines_min) {
1384                 PARA_WARNING_LOG("can not decrease top window");
1385                 return;
1386         }
1387         init_wins(top.lines - 1);
1388         wclear(top.win);
1389         print_all_items();
1390         print_in_bar(COLOR_MSG, "%s", "decreased top window");
1391 }
1392
1393 static void com_enlarge_top_win(void)
1394 {
1395         if (bot.lines < 3) {
1396                 PARA_WARNING_LOG("can not increase top window");
1397                 return;
1398         }
1399         init_wins(top.lines + 1);
1400         wclear(top.win);
1401         print_all_items();
1402         print_in_bar(COLOR_MSG, "increased top window");
1403 }
1404
1405 static void com_version(void)
1406 {
1407         print_in_bar(COLOR_MSG, "para_gui " PACKAGE_VERSION " \""
1408                 CODENAME "\"");
1409 }
1410
1411 __noreturn static void com_quit(void)
1412 {
1413         finish(0);
1414 }
1415
1416 static void com_refresh(void)
1417 {
1418         shutdown_curses();
1419         init_curses();
1420 }
1421
1422 static void change_theme(int next)
1423 {
1424         if (next)
1425                 next_theme(&theme);
1426         else
1427                 prev_theme(&theme);
1428         /* This seems to be needed twice, why? */
1429         com_refresh();
1430         com_refresh();
1431         PARA_NOTICE_LOG("new theme: %s", theme.name);
1432 }
1433
1434 static void com_next_theme(void)
1435 {
1436         change_theme(1);
1437 }
1438
1439 static void com_prev_theme(void)
1440 {
1441         change_theme(0);
1442 }
1443
1444
1445 static void handle_command(int c)
1446 {
1447         int i;
1448
1449         /* first check user's key bindings */
1450         for (i = 0; i < conf.key_map_given; ++i) {
1451                 char *tmp, *handler, *arg;
1452
1453                 tmp = para_strdup(conf.key_map_arg[i]);
1454                 if (!split_key_map(tmp, &handler, &arg)) {
1455                         free(tmp);
1456                         return;
1457                 }
1458                 if (strcmp(tmp, km_keyname(c))) {
1459                         free(tmp);
1460                         continue;
1461                 }
1462                 if (*handler == 'd')
1463                         display_cmd(arg);
1464                 else if (*handler == 'x')
1465                         external_cmd(arg);
1466                 else if (*handler == 'p')
1467                         para_cmd(arg);
1468                 else if (*handler == 'i') {
1469                         int num = find_cmd_byname(arg);
1470                         if (num >= 0)
1471                                 command_list[num].handler();
1472                 }
1473                 free(tmp);
1474                 return;
1475         }
1476         /* not found, check internal key bindings */
1477         for (i = 0; command_list[i].handler; i++) {
1478                 if (!strcmp(km_keyname(c), command_list[i].key)) {
1479                         command_list[i].handler();
1480                         return;
1481                 }
1482         }
1483         print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1484                 km_keyname(c));
1485 }
1486
1487 int main(int argc, char *argv[])
1488 {
1489         int ret;
1490         char *cf;
1491
1492         _argc = argc;
1493         _argv = argv;
1494
1495         gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
1496         HANDLE_VERSION_FLAG("gui", conf);
1497         cf = configfile_exists();
1498         if (!cf && conf.config_file_given) {
1499                 fprintf(stderr, "can not read config file %s\n",
1500                         conf.config_file_arg);
1501                 exit(EXIT_FAILURE);
1502         }
1503         if (cf) {
1504                 struct gui_cmdline_parser_params params = {
1505                         .override = 0,
1506                         .initialize = 0,
1507                         .check_required = 0,
1508                         .check_ambiguity = 0,
1509                         .print_errors = 1,
1510                 };
1511                 if (gui_cmdline_parser_config_file(cf, &conf, &params) != 0)
1512                         exit(EXIT_FAILURE);
1513         }
1514         loglevel = get_loglevel_by_name(conf.loglevel_arg);
1515         if (check_key_map_args() < 0) {
1516                 fprintf(stderr, "invalid key map\n");
1517                 exit(EXIT_FAILURE);
1518         }
1519         init_theme_or_die(conf.theme_arg, &theme);
1520         top.lines = theme.top_lines_default;
1521         setup_signal_handling();
1522         bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1523         initscr(); /* needed only once, always successful */
1524         init_curses();
1525         print_welcome();
1526         for (;;) {
1527                 print_status_bar();
1528                 ret = do_select(GETCH_MODE);
1529                 if (!ret)
1530                         continue;
1531                 print_in_bar(COLOR_MSG, " ");
1532                 handle_command(ret);
1533         }
1534 }