2 * Copyright (C) 1998-2014 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file gui.c Curses-based interface for paraslash. */
11 #include <sys/types.h>
16 #include "gui.cmdline.h"
20 #include "ringbuffer.h"
29 /** define the array of error lists needed by para_gui */
31 static char *stat_content[NUM_STAT_ITEMS];
33 static int signal_pipe;
35 static struct gui_window {
37 } top, bot, sb, in, sep;
39 #define RINGBUFFER_SIZE 512
45 static struct ringbuffer *bot_win_rb;
47 static unsigned scroll_position;
51 static int command_fds[2] = {-1, -1};
52 static int stat_pipe = -1;
53 static struct gui_args_info conf;
56 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
60 * Codes for various colors.
62 * Each status item has its own color pair. The ones defined here start at a
63 * higher number so that they do not overlap with these.
66 COLOR_STATUSBAR = NUM_STAT_ITEMS + 1,
79 const char *description;
80 void (*handler)(void);
83 static struct gui_theme theme;
85 static void com_help(void);
86 static void com_reread_conf(void);
87 static void com_enlarge_top_win(void);
88 static void com_shrink_top_win(void);
89 static void com_version(void);
90 __noreturn static void com_quit(void);
91 static void com_refresh(void);
92 static void com_ll_incr(void);
93 static void com_ll_decr(void);
94 static void com_prev_theme(void);
95 static void com_next_theme(void);
96 static void com_scroll_up(void);
97 static void com_scroll_down(void);
98 static void com_page_up(void);
99 static void com_page_down(void);
100 static void com_cancel_scrolling(void);
101 static void com_scroll_top(void);
103 static struct gui_command command_list[] = {
107 .description = "print help",
111 .name = "enlarge_win",
112 .description = "enlarge the top window",
113 .handler = com_enlarge_top_win
116 .name = "shrink_win",
117 .description = "shrink the top window",
118 .handler = com_shrink_top_win
121 .name = "reread_conf",
122 .description = "reread configuration file",
123 .handler = com_reread_conf
127 .description = "exit para_gui",
132 .description = "redraw the screen",
133 .handler = com_refresh
136 .name = "next_theme",
137 .description = "switch to next theme",
138 .handler = com_next_theme
141 .name = "prev_theme",
142 .description = "switch to previous stream",
143 .handler = com_prev_theme
147 .description = "increase loglevel (decreases verbosity)",
148 .handler = com_ll_incr
152 .description = "decrease loglevel (increases verbosity)",
153 .handler = com_ll_decr
157 .description = "show the para_gui version",
158 .handler = com_version
162 .description = "scroll up one line",
163 .handler = com_scroll_up
166 .name = "scroll_down",
167 .description = "scroll down one line",
168 .handler = com_scroll_down
172 .description = "scroll up one page",
173 .handler = com_page_up
177 .description = "scroll down one page",
178 .handler = com_page_down
181 .name = "scroll_top",
182 .description = "scroll to top of buffer",
183 .handler = com_scroll_top
186 .name = "cancel_scroll",
187 .description = "deactivate scroll mode",
188 .handler = com_cancel_scrolling
194 static int find_cmd_byname(char *name)
198 for (i = 0; command_list[i].handler; i++)
199 if (!strcmp(command_list[i].name, name))
205 * Even though ncurses provides getmaxx and getmaxy, these functions/macros are
206 * not described in the XSI Curses standard.
208 static int get_num_lines(struct gui_window *w)
211 __a_unused int cols; /* avoid "set but not used" warnings */
213 getmaxyx(w->win, lines, cols);
217 static int get_num_cols(struct gui_window *w)
219 __a_unused int lines; /* avoid "set but not used" warnings */
222 getmaxyx(w->win, lines, cols);
226 /** Number of lines of the window are occupied by an output line. */
227 #define NUM_LINES(len) (1 + (len) / get_num_cols(&bot))
229 /* isendwin() returns false before initscr() was called */
230 static bool curses_active(void)
232 return top.win && !isendwin();
235 /* taken from mutt */
236 static char *km_keyname(int c)
241 sprintf(buf, "<up>");
245 sprintf(buf, "<down>");
249 sprintf(buf, "<left>");
252 if (c == KEY_RIGHT) {
253 sprintf(buf, "<right>");
256 if (c == KEY_NPAGE) {
257 sprintf(buf, "<npage>");
260 if (c == KEY_PPAGE) {
261 sprintf(buf, "<ppage>");
265 sprintf(buf, "<home>");
269 sprintf(buf, "<end>");
272 if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
277 buf[1] = (c + '@') & 0x7f;
280 snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
281 (c >> 3) & 7, c & 7);
282 } else if (c >= KEY_F0 && c < KEY_F(256))
283 sprintf(buf, "<F%d>", c - KEY_F0);
285 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
287 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
291 /* Print given number of spaces to curses window. */
292 static void add_spaces(WINDOW* win, unsigned int num)
295 unsigned sz = sizeof(space) - 1; /* number of spaces */
309 * print aligned string to curses window. This function always prints
312 static int align_str(WINDOW* win, char *str, unsigned int len,
315 int ret, i, num; /* of spaces */
320 ret = strwidth(str, &width);
322 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
331 /* replace control characters by spaces */
332 for (i = 0; i < len && str[i]; i++) {
333 if (str[i] == '\n' || str[i] == '\r' || str[i] == '\f')
338 add_spaces(win, num);
339 } else if (align == RIGHT) {
340 add_spaces(win, num);
343 add_spaces(win, num / 2);
344 waddstr(win, str[0]? str: "");
345 add_spaces(win, num - num / 2);
350 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
355 if (!curses_active())
357 wattron(in.win, COLOR_PAIR(color));
359 xvasprintf(&msg, fmt, ap);
362 align_str(in.win, msg, get_num_cols(&in), LEFT);
367 static void print_status_bar(void)
371 tmp = para_strdup("para_gui " PACKAGE_VERSION " (hit ? for help)");
373 align_str(sb.win, tmp, get_num_cols(&sb), CENTER);
378 * get the number of the oldest rbe that is (partially) visible. On return,
379 * lines contains the sum of the number of lines of all visible entries. If the
380 * first one is only partially visible, lines is greater than bot.lines.
382 static int first_visible_rbe(unsigned *lines)
384 int i, bot_lines = get_num_lines(&bot);
387 for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
388 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
392 rbe_lines = NUM_LINES(rbe->len);
393 if (rbe_lines > bot_lines)
396 if (*lines >= bot_lines)
399 return RINGBUFFER_SIZE - 1;
403 returns number of first visible rbe, *lines is the number of lines drawn.
405 static int draw_top_rbe(unsigned *lines)
407 int bot_cols, bot_lines, ret, fvr = first_visible_rbe(lines);
408 struct rb_entry *rbe;
409 size_t bytes_to_skip, cells_to_skip, width;
413 wmove(bot.win, 0, 0);
414 rbe = ringbuffer_get(bot_win_rb, fvr);
417 getmaxyx(bot.win, bot_lines, bot_cols);
418 if (*lines > bot_lines) {
419 /* rbe is partially visible multi-line */
420 cells_to_skip = (*lines - bot_lines) * bot_cols;
421 ret = skip_cells(rbe->msg, cells_to_skip, &bytes_to_skip);
424 ret = strwidth(rbe->msg + bytes_to_skip, &width);
431 wattron(bot.win, COLOR_PAIR(rbe->color));
432 waddstr(bot.win, rbe->msg + bytes_to_skip);
433 *lines = NUM_LINES(width);
437 static void redraw_bot_win(void)
440 int i, bot_lines = get_num_lines(&bot);
442 wmove(bot.win, 0, 0);
444 i = draw_top_rbe(&lines);
447 while (i > 0 && lines < bot_lines) {
448 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
451 waddstr(bot.win, "\n");
454 lines += NUM_LINES(rbe->len);
455 wattron(bot.win, COLOR_PAIR(rbe->color));
456 waddstr(bot.win, "\n");
457 waddstr(bot.win, rbe->msg);
463 static void rb_add_entry(int color, char *msg)
465 struct rb_entry *old, *new;
469 if (strwidth(msg, &len) < 0)
471 new = para_malloc(sizeof(struct rb_entry));
475 old = ringbuffer_add(bot_win_rb, new);
480 if (scroll_position) {
481 /* discard current scrolling, like xterm does */
486 wattron(bot.win, COLOR_PAIR(color));
487 getyx(bot.win, y, x);
489 waddstr(bot.win, "\n");
490 waddstr(bot.win, msg);
494 * print formated output to bot win and refresh
496 __printf_2_3 static void outputf(int color, const char* fmt,...)
501 if (!curses_active())
504 xvasprintf(&msg, fmt, ap);
506 rb_add_entry(color, msg);
510 static int add_output_line(char *line, void *data)
512 int color = *(int *)data? COLOR_ERRMSG : COLOR_OUTPUT;
514 if (!curses_active())
516 rb_add_entry(color, para_strdup(line));
520 static __printf_2_3 void curses_log(int ll, const char *fmt,...)
527 if (curses_active()) {
528 int color = ll <= LL_NOTICE? COLOR_MSG : COLOR_ERRMSG;
530 unsigned bytes = xvasprintf(&msg, fmt, ap);
531 if (bytes > 0 && msg[bytes - 1] == '\n')
532 msg[bytes - 1] = '\0'; /* cut trailing newline */
533 rb_add_entry(color, msg);
535 } else if (cmd_pid <= 0) /* no external command running */
536 vfprintf(stderr, fmt, ap);
539 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
541 static void setup_signal_handling(void)
543 signal_pipe = para_signal_init();
544 para_install_sighandler(SIGINT);
545 para_install_sighandler(SIGTERM);
546 para_install_sighandler(SIGCHLD);
547 para_install_sighandler(SIGWINCH);
548 para_install_sighandler(SIGUSR1);
551 static void shutdown_curses(void)
557 /* disable curses, print a message, kill running processes and exit */
558 __noreturn __printf_2_3 static void die(int exit_code, const char* fmt, ...)
564 vfprintf(stderr, fmt, argp);
566 /* kill every process in the process group and exit */
567 para_sigaction(SIGTERM, SIG_IGN);
573 * Print stat item #i to curses window
575 static void print_stat_item(int i)
578 struct stat_item_data d = theme.data[i];
579 char *c = stat_content[i];
580 int top_lines = get_num_lines(&top);
582 if (!curses_active() || !d.len || !c)
584 tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
585 wmove(top.win, d.y * top_lines / 100, d.x * COLS / 100);
587 wattron(top.win, COLOR_PAIR(i + 1));
588 align_str(top.win, tmp, d.len * COLS / 100, d.align);
593 static int update_item(int item_num, char *buf)
595 char **c = stat_content + item_num;
602 *c = para_strdup("(artist tag not set)");
605 *c = para_strdup("(title tag not set)");
608 *c = para_strdup("????");
611 *c = para_strdup("(album tag not set)");
614 *c = para_strdup("(comment tag not set)");
618 *c = para_strdup(buf);
620 print_stat_item(item_num);
624 static int read_stat_pipe(fd_set *rfds)
627 static int bufsize, loaded;
633 if (loaded >= bufsize) {
634 if (bufsize > 1000 * 1000) {
638 bufsize += bufsize + 1000;
639 buf = para_realloc(buf, bufsize);
641 assert(loaded < bufsize);
642 ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
645 ret2 = for_each_stat_item(buf, loaded, update_item);
646 if (ret < 0 || ret2 < 0) {
648 return ret2 < 0? ret2 : ret;
650 sz = ret2; /* what is left */
651 if (sz > 0 && sz < loaded)
652 memmove(buf, buf + loaded - sz, sz);
657 static void print_all_items(void)
661 if (!curses_active())
663 FOR_EACH_STATUS_ITEM(i)
667 static void clear_all_items(void)
671 FOR_EACH_STATUS_ITEM(i) {
672 free(stat_content[i]);
673 stat_content[i] = para_strdup("");
680 static void init_wins(int top_lines)
682 int top_y = 0, bot_y = top_lines + 1, sb_y = LINES - 2,
683 in_y = LINES - 1, sep_y = top_lines;
684 int bot_lines = LINES - top_lines - 3, sb_lines = 1, in_lines = 1,
687 assume_default_colors(theme.default_fg, theme.default_bg);
689 wresize(top.win, top_lines, COLS);
690 mvwin(top.win, top_y, 0);
692 wresize(sb.win, sb_lines, COLS);
693 mvwin(sb.win, sb_y, 0);
695 wresize(sep.win, sep_lines, COLS);
696 mvwin(sep.win, sep_y, 0);
698 wresize(bot.win, bot_lines, COLS);
699 mvwin(bot.win, bot_y, 0);
701 wresize(in.win, in_lines, COLS);
702 mvwin(in.win, in_y, 0);
704 sep.win = newwin(sep_lines, COLS, sep_y, 0);
705 top.win = newwin(top_lines, COLS, top_y, 0);
706 bot.win = newwin(bot_lines, COLS, bot_y, 0);
707 sb.win = newwin(sb_lines, COLS, sb_y, 0);
708 in.win = newwin(in_lines, COLS, in_y, 0);
709 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
710 die(EXIT_FAILURE, "Error: Cannot create curses windows\n");
714 scrollok(bot.win, 1);
715 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
716 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
717 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
718 wattron(top.win, COLOR_PAIR(COLOR_TOP));
729 wmove(sep.win, 0, 0);
730 whline(sep.win, theme.sep_char, COLS);
734 wnoutrefresh(top.win);
735 wnoutrefresh(bot.win);
737 wnoutrefresh(sb.win);
738 wnoutrefresh(in.win);
739 wnoutrefresh(sep.win);
743 static void init_pair_or_die(short pair, short f, short b)
745 if (init_pair(pair, f, b) == ERR)
746 die(EXIT_FAILURE, "fatal: init_pair() failed\n");
749 static void init_colors_or_die(void)
754 die(EXIT_FAILURE, "fatal: No color term\n");
755 if (start_color() == ERR)
756 die(EXIT_FAILURE, "fatal: failed to start colors\n");
757 FOR_EACH_STATUS_ITEM(i)
758 if (theme.data[i].len)
759 init_pair_or_die(i + 1, theme.data[i].fg,
761 init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
762 init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
763 init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
764 init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
765 init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
766 init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
767 init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
768 init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
771 /* (Re-)initialize the curses library. */
772 static void init_curses(void)
776 if (top.win && refresh() == ERR) /* refresh is really needed */
777 die(EXIT_FAILURE, "refresh() failed\n");
778 if (LINES < theme.lines_min || COLS < theme.cols_min)
779 die(EXIT_FAILURE, "Terminal (%dx%d) too small"
780 " (need at least %dx%d)\n", COLS, LINES,
781 theme.cols_min, theme.lines_min);
782 curs_set(0); /* make cursor invisible, ignore errors */
783 nonl(); /* do not NL->CR/NL on output, always returns OK */
784 /* don't echo input */
786 die(EXIT_FAILURE, "fatal: noecho() failed\n");
787 /* take input chars one at a time, no wait for \n */
789 die(EXIT_FAILURE, "fatal: cbreak() failed\n");
790 init_colors_or_die();
791 clear(); /* ignore non-fatal errors */
792 init_wins(theme.top_lines_default);
793 // noecho(); /* don't echo input */
796 static void check_sigchld(void)
802 ret = para_reap_child(&pid);
807 goto reap_next_child;
811 * This sucker modifies its first argument. *handler and *arg are
812 * pointers to 0-terminated strings (inside line). Crap.
814 static int split_key_map(char *line, char **handler, char **arg)
816 if (!(*handler = strchr(line + 1, ':')))
820 if (!(*arg = strchr(*handler, ':')))
829 static void check_key_map_args_or_die(void)
834 for (i = 0; i < conf.key_map_given; ++i) {
838 tmp = para_strdup(conf.key_map_arg[i]);
839 if (!split_key_map(tmp, &handler, &arg))
841 if (strlen(handler) != 1)
843 if (*handler != 'x' && *handler != 'd' && *handler != 'i'
848 if (find_cmd_byname(arg) < 0)
851 if (i != conf.key_map_given)
852 die(EXIT_FAILURE, "invalid key map: %s\n", conf.key_map_arg[i]);
856 static void parse_config_file_or_die(bool override)
860 struct gui_cmdline_parser_params params = {
861 .override = override,
863 .check_required = !override,
864 .check_ambiguity = 0,
868 if (conf.config_file_given)
869 config_file = para_strdup(conf.config_file_arg);
871 char *home = para_homedir();
872 config_file = make_message("%s/.paraslash/gui.conf", home);
875 if (!file_exists(config_file)) {
876 if (!conf.config_file_given)
879 PARA_EMERG_LOG("config file %s does not exist\n",
885 gui_cmdline_parser_config_file(config_file, &conf, ¶ms);
886 loglevel = get_loglevel_by_name(conf.loglevel_arg);
887 check_key_map_args_or_die();
888 theme_init(conf.theme_arg, &theme);
896 /* reread configuration, terminate on errors */
897 static void reread_conf(void)
900 * gengetopt might print to stderr and exit on errors. So we have to
901 * shutdown curses first.
904 parse_config_file_or_die(true /* override */);
906 print_in_bar(COLOR_MSG, "config file reloaded\n");
910 * React to various signal-related events
912 static void handle_signal(int sig)
916 die(EXIT_FAILURE, "only the good die young (caught SIGTERM)\n");
919 if (curses_active()) {
926 PARA_WARNING_LOG("caught SIGINT, reset\n");
927 /* Nothing to do. SIGINT killed our child which gets noticed
928 * by do_select and resets everything.
932 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration\n");
941 static void status_pre_select(fd_set *rfds, int *max_fileno, struct timeval *tv)
943 static struct timeval next_exec, atm, diff;
944 int ret, fds[3] = {0, 1, 0};
949 /* Avoid busy loop */
950 gettimeofday(&atm, NULL);
951 if (tv_diff(&next_exec, &atm, &diff) > 0) {
952 if (tv_diff(&diff, tv, NULL) < 0)
956 next_exec.tv_sec = atm.tv_sec + 2;
957 ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
960 ret = mark_fd_nonblocking(fds[1]);
967 para_fd_set(stat_pipe, rfds, max_fileno);
970 #define COMMAND_BUF_SIZE 32768
973 * This is the core select loop. Besides the (internal) signal
974 * pipe, the following other fds are checked according to the mode:
976 * GETCH_MODE: check stdin, return when key is pressed
978 * COMMAND_MODE: check command fds and stdin. Return when peer has closed both
979 * stdout and stderr or when any key is pressed.
981 * EXTERNAL_MODE: Check only signal pipe. Used when an external command
982 * is running. During that time curses is disabled. Returns when
985 static int do_select(int mode)
988 int ret, i, max_fileno;
989 char command_buf[2][COMMAND_BUF_SIZE] = {"", ""};
990 int cbo[2] = {0, 0}; /* command buf offsets */
992 unsigned flags[2] = {0, 0}; /* for for_each_line() */
995 tv.tv_sec = conf.timeout_arg / 1000;
996 tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
997 // ret = refresh_status();
1000 status_pre_select(&rfds, &max_fileno, &tv);
1002 para_fd_set(signal_pipe, &rfds, &max_fileno);
1003 /* command pipe only for COMMAND_MODE */
1004 if (mode == COMMAND_MODE) {
1005 if (command_fds[0] >= 0)
1006 para_fd_set(command_fds[0], &rfds, &max_fileno);
1007 if (command_fds[1] >= 0)
1008 para_fd_set(command_fds[1], &rfds, &max_fileno);
1010 if (mode == GETCH_MODE || mode == COMMAND_MODE)
1011 para_fd_set(STDIN_FILENO, &rfds, &max_fileno);
1012 ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
1014 goto check_return; /* skip fd checks */
1016 ret = para_next_signal(&rfds);
1019 /* read command pipe if ready */
1020 if (mode == COMMAND_MODE) {
1021 for (i = 0; i < 2; i++) {
1023 if (command_fds[i] < 0)
1025 ret = read_nonblock(command_fds[i],
1026 command_buf[i] + cbo[i],
1027 COMMAND_BUF_SIZE - 1 - cbo[i], &rfds, &sz);
1030 cbo[i] = for_each_line(flags[i], command_buf[i], cbo[i],
1031 add_output_line, &i);
1032 if (sz != cbo[i]) { /* at least one line found */
1037 PARA_NOTICE_LOG("closing command fd %d: %s\n",
1038 i, para_strerror(-ret));
1039 close(command_fds[i]);
1040 command_fds[i] = -1;
1043 if (command_fds[!i] < 0) /* both fds closed */
1046 if (cbo[i] == COMMAND_BUF_SIZE - 1) {
1047 PARA_NOTICE_LOG("discarding overlong line\n");
1049 flags[i] = FELF_DISCARD_FIRST;
1053 ret = read_stat_pipe(&rfds);
1055 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1059 free(stat_content[SI_BASENAME]);
1060 stat_content[SI_BASENAME] =
1061 para_strdup("stat command terminated!?");
1067 ret = wgetch(top.win);
1068 if (ret != ERR && ret != KEY_RESIZE) {
1070 kill(cmd_pid, SIGTERM);
1075 ret = wgetch(top.win);
1076 if (ret != ERR && ret != KEY_RESIZE)
1086 /* read from command pipe and print data to bot window */
1087 static void exec_and_display_cmd(const char *cmd)
1089 int ret, fds[3] = {0, 1, 1};
1091 outputf(COLOR_COMMAND, "%s", cmd);
1092 ret = para_exec_cmdline_pid(&cmd_pid, cmd, fds);
1095 ret = mark_fd_nonblocking(fds[1]);
1098 ret = mark_fd_nonblocking(fds[2]);
1101 command_fds[0] = fds[1];
1102 command_fds[1] = fds[2];
1103 if (do_select(COMMAND_MODE) >= 0)
1104 PARA_INFO_LOG("command complete\n");
1106 PARA_NOTICE_LOG("command aborted\n");
1107 print_in_bar(COLOR_MSG, " ");
1110 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1111 close(command_fds[0]);
1112 close(command_fds[1]);
1115 static void para_cmd(char *cmd)
1119 print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1120 c = make_message(BINDIR "/para_client -- %s", cmd);
1121 exec_and_display_cmd(c);
1125 static void display_cmd(char *cmd)
1127 print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1128 exec_and_display_cmd(cmd);
1132 * shutdown curses and stat pipe before executing external commands
1134 static void external_cmd(char *cmd)
1136 int fds[3] = {-1, -1, -1};
1141 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1143 do_select(EXTERNAL_MODE);
1147 static void print_scroll_msg(void)
1149 unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1150 int first_rbe = first_visible_rbe(&lines_total);
1152 print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1153 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1156 static void com_scroll_top(void)
1158 int i = RINGBUFFER_SIZE - 1, bot_lines = get_num_lines(&bot);
1161 while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1163 /* i is oldest entry */
1164 for (; lines < bot_lines && i >= 0; i--) {
1165 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1168 lines += NUM_LINES(rbe->len);
1171 if (lines > 0 && scroll_position != i) {
1172 scroll_position = i;
1177 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1180 static void com_cancel_scrolling(void)
1183 if (scroll_position == 0) {
1184 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1187 scroll_position = 0;
1191 static void com_page_down(void)
1194 int i = scroll_position, bot_lines = get_num_lines(&bot);
1196 while (lines < bot_lines && --i > 0) {
1197 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1200 lines += NUM_LINES(rbe->len);
1203 scroll_position = i;
1208 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1211 static void com_page_up(void)
1214 int fvr = first_visible_rbe(&lines), bot_lines = get_num_lines(&bot);
1216 if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1217 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1220 scroll_position = fvr + 1;
1221 for (; scroll_position > 0; scroll_position--) {
1222 first_visible_rbe(&lines);
1223 if (lines == bot_lines)
1230 static void com_scroll_down(void)
1232 struct rb_entry *rbe;
1233 int rbe_lines, bot_lines = get_num_lines(&bot);
1235 if (!scroll_position) {
1236 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1240 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1241 rbe_lines = NUM_LINES(rbe->len);
1242 wscrl(bot.win, rbe_lines);
1243 wmove(bot.win, bot_lines - rbe_lines, 0);
1244 wattron(bot.win, COLOR_PAIR(rbe->color));
1245 waddstr(bot.win, rbe->msg);
1250 static void com_scroll_up(void)
1252 struct rb_entry *rbe = NULL;
1254 int i, first_rbe, num_scroll;
1256 /* the entry that is going to vanish */
1257 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1260 num_scroll = NUM_LINES(rbe->len);
1261 first_rbe = first_visible_rbe(&lines);
1262 if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1265 wscrl(bot.win, -num_scroll);
1266 i = draw_top_rbe(&lines);
1269 while (i > 0 && lines < num_scroll) {
1271 rbe = ringbuffer_get(bot_win_rb, --i);
1274 rbe_lines = NUM_LINES(rbe->len);
1276 wattron(bot.win, COLOR_PAIR(rbe->color));
1277 waddstr(bot.win, "\n");
1278 waddstr(bot.win, rbe->msg);
1287 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1290 static void com_ll_decr(void)
1292 if (loglevel <= LL_DEBUG) {
1293 print_in_bar(COLOR_ERRMSG,
1294 "loglevel already at maximal verbosity\n");
1298 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1301 static void com_ll_incr(void)
1303 if (loglevel >= LL_EMERG) {
1304 print_in_bar(COLOR_ERRMSG,
1305 "loglevel already at minimal verbosity\n");
1309 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1312 static void com_reread_conf(void)
1317 static void com_help(void)
1321 for (i = 0; i < conf.key_map_given; ++i) {
1322 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1323 const char *handler_text = "???", *desc = NULL;
1325 if (!split_key_map(tmp, &handler, &arg)) {
1331 handler_text = "internal";
1332 desc = command_list[find_cmd_byname(arg)].description;
1334 case 'x': handler_text = "external"; break;
1335 case 'd': handler_text = "display "; break;
1336 case 'p': handler_text = "para "; break;
1338 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1339 strlen(arg) < 8? "\t" : "",
1343 for (i = 0; command_list[i].handler; i++) {
1344 struct gui_command gc = command_list[i];
1346 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1347 strlen(gc.name) < 8? "\t" : "",
1350 print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1354 static void com_shrink_top_win(void)
1356 int top_lines = get_num_lines(&top);
1358 if (top_lines <= theme.top_lines_min) {
1359 PARA_WARNING_LOG("can not decrease top window\n");
1362 init_wins(top_lines - 1);
1363 print_in_bar(COLOR_MSG, "%s", "decreased top window");
1366 static void com_enlarge_top_win(void)
1368 int top_lines = get_num_lines(&top), bot_lines = get_num_lines(&bot);
1370 if (bot_lines < 3) {
1371 PARA_WARNING_LOG("can not increase top window\n");
1374 init_wins(top_lines + 1);
1375 print_in_bar(COLOR_MSG, "increased top window");
1378 static void com_version(void)
1380 print_in_bar(COLOR_MSG, "%s", version_single_line("gui"));
1383 __noreturn static void com_quit(void)
1385 die(EXIT_SUCCESS, "%s", "");
1388 static void com_refresh(void)
1394 static void com_next_theme(void)
1400 static void com_prev_theme(void)
1406 static void handle_command(int c)
1410 /* first check user-defined key bindings */
1411 for (i = 0; i < conf.key_map_given; ++i) {
1412 char *tmp, *handler, *arg;
1414 tmp = para_strdup(conf.key_map_arg[i]);
1415 if (!split_key_map(tmp, &handler, &arg)) {
1419 if (strcmp(tmp, km_keyname(c))) {
1423 if (*handler == 'd')
1425 else if (*handler == 'x')
1427 else if (*handler == 'p')
1429 else if (*handler == 'i') {
1430 int num = find_cmd_byname(arg);
1432 command_list[num].handler();
1437 /* not found, check internal key bindings */
1438 for (i = 0; command_list[i].handler; i++) {
1439 if (!strcmp(km_keyname(c), command_list[i].key)) {
1440 command_list[i].handler();
1444 print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1448 __noreturn static void print_help_and_die(void)
1450 struct ggo_help h = DEFINE_GGO_HELP(gui);
1451 bool d = conf.detailed_help_given;
1453 ggo_print_help(&h, d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS);
1457 int main(int argc, char *argv[])
1461 gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
1462 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1463 version_handle_flag("gui", conf.version_given);
1464 if (conf.help_given || conf.detailed_help_given)
1465 print_help_and_die();
1466 parse_config_file_or_die(false /* override */);
1467 setup_signal_handling();
1468 bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1469 setlocale(LC_CTYPE, "");
1470 initscr(); /* needed only once, always successful */
1474 ret = do_select(GETCH_MODE);
1477 print_in_bar(COLOR_MSG, " ");
1478 handle_command(ret);