2 * Copyright (C) 1998-2012 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>
14 #include "gui.cmdline.h"
18 #include "ringbuffer.h"
26 /** define the array of error lists needed by para_gui */
28 static char *stat_content[NUM_STAT_ITEMS];
30 #define STANDARD_STATUS_BAR "para_gui " PACKAGE_VERSION " (hit ? for help)"
32 static int signal_pipe;
34 static struct win_data {
40 } top, bot, sb, in, sep;
42 #define RINGBUFFER_SIZE 512
48 static struct ringbuffer *bot_win_rb;
49 #define NUM_LINES(len) (1 + (len) / bot.cols)
51 static unsigned scroll_position;
53 static int cmd_died, curses_active;
56 static int command_pipe = -1;
57 static int stat_pipe = -1;
58 static struct gui_args_info conf;
60 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
63 #define COLOR_STATUSBAR 52
64 #define COLOR_COMMAND 53
65 #define COLOR_OUTPUT 54
67 #define COLOR_ERRMSG 56
68 #define COLOR_WELCOME 57
69 #define COLOR_SEPARATOR 58
76 const char *description;
77 void (*handler)(void);
83 char postfix[MAXLINE];
89 char content[MAXLINE];
92 static struct gui_theme theme;
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);
115 static struct gui_command command_list[] = {
119 .description = "print help",
123 .name = "enlarge_win",
124 .description = "enlarge the top window",
125 .handler = com_enlarge_top_win
128 .name = "shrink_win",
129 .description = "shrink the top window",
130 .handler = com_shrink_top_win
133 .name = "reread_conf",
134 .description = "reread configuration file",
135 .handler = com_reread_conf
139 .description = "exit para_gui",
144 .description = "redraw the screen",
145 .handler = com_refresh
148 .name = "next_theme",
149 .description = "switch to next theme",
150 .handler = com_next_theme
153 .name = "prev_theme",
154 .description = "switch to previous stream",
155 .handler = com_prev_theme
159 .description = "increase loglevel (decreases verbosity)",
160 .handler = com_ll_incr
164 .description = "decrease loglevel (increases verbosity)",
165 .handler = com_ll_decr
169 .description = "show the para_gui version",
170 .handler = com_version
174 .description = "scroll up one line",
175 .handler = com_scroll_up
178 .name = "scroll_down",
179 .description = "scroll down one line",
180 .handler = com_scroll_down
184 .description = "scroll up one page",
185 .handler = com_page_up
189 .description = "scroll down one page",
190 .handler = com_page_down
193 .name = "scroll_top",
194 .description = "scroll to top of buffer",
195 .handler = com_scroll_top
198 .name = "cancel_scroll",
199 .description = "deactivate scroll mode",
200 .handler = com_cancel_scrolling
206 static int find_cmd_byname(char *name)
210 for (i = 0; command_list[i].handler; i++)
211 if (!strcmp(command_list[i].name, name))
216 /* taken from mutt */
217 static char *km_keyname(int c)
222 sprintf(buf, "<up>");
226 sprintf(buf, "<down>");
230 sprintf(buf, "<left>");
233 if (c == KEY_RIGHT) {
234 sprintf(buf, "<right>");
237 if (c == KEY_NPAGE) {
238 sprintf(buf, "<npage>");
241 if (c == KEY_PPAGE) {
242 sprintf(buf, "<ppage>");
246 sprintf(buf, "<home>");
250 sprintf(buf, "<end>");
253 if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
258 buf[1] = (c + '@') & 0x7f;
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);
266 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
268 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
272 static char *configfile_exists(void)
274 static char *config_file;
277 if (!conf.config_file_given) {
279 char *home = para_homedir();
280 config_file = make_message("%s/.paraslash/gui.conf",
286 tmp = conf.config_file_arg;
287 return file_exists(tmp)? tmp: NULL;
291 * print num spaces to curses window
293 static void add_spaces(WINDOW* win, unsigned int num)
302 * print aligned string to curses window. This function always prints
305 static int align_str(WINDOW* win, char *str, unsigned int len,
308 int i, num; /* of spaces */
312 num = len - strlen(str);
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')
324 add_spaces(win, num);
325 } else if (align == RIGHT) {
326 add_spaces(win, num);
329 add_spaces(win, num / 2);
330 waddstr(win, str[0]? str: "");
331 add_spaces(win, num - num / 2);
336 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
342 wattron(in.win, COLOR_PAIR(color));
343 PARA_VSPRINTF(fmt, msg);
345 align_str(in.win, msg, sb.cols, LEFT);
351 * update the status bar
353 static void print_status_bar(void)
359 tmp = para_strdup(STANDARD_STATUS_BAR);
361 align_str(sb.win, tmp, sb.cols, CENTER);
367 * get the number of the oldest rbe that is (partially) visible. On return,
368 * lines contains the sum of the number of lines of all visable entries. If the
369 * first one is only partially visible, lines is greater than bot.lines.
371 static int first_visible_rbe(unsigned *lines)
375 for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
376 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
380 // fprintf(stderr, "found: %s\n", rbe->msg);
381 rbe_lines = NUM_LINES(rbe->len);
382 if (rbe_lines > bot.lines)
385 if (*lines >= bot.lines)
388 return RINGBUFFER_SIZE - 1;
391 static int draw_top_rbe(unsigned *lines)
394 int offset, fvr = first_visible_rbe(lines);
395 struct rb_entry *rbe;
399 wmove(bot.win, 0, 0);
400 rbe = ringbuffer_get(bot_win_rb, fvr);
403 len = strlen(rbe->msg);
404 if (*lines > bot.lines) {
405 /* first rbe is only partially visible */
406 offset = (*lines - bot.lines) * bot.cols;
407 assert(offset <= len);
410 wattron(bot.win, COLOR_PAIR(rbe->color));
411 waddstr(bot.win, rbe->msg + offset);
412 *lines = NUM_LINES(len - offset);
416 static void redraw_bot_win(void)
421 wmove(bot.win, 0, 0);
423 i = draw_top_rbe(&lines);
426 while (i > 0 && lines < bot.lines) {
427 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
430 waddstr(bot.win, "\n");
433 lines += NUM_LINES(rbe->len);
434 wattron(bot.win, COLOR_PAIR(rbe->color));
435 waddstr(bot.win, "\n");
436 waddstr(bot.win, rbe->msg);
442 static void rb_add_entry(int color, char *msg)
444 struct rb_entry *old, *new = para_malloc(sizeof(struct rb_entry));
447 new->len = strlen(msg);
449 old = ringbuffer_add(bot_win_rb, new);
450 // fprintf(stderr, "added: %s\n", new->msg);
455 if (scroll_position) {
456 /* discard current scrolling, like xterm does */
461 wattron(bot.win, COLOR_PAIR(color));
462 getyx(bot.win, y, x);
464 waddstr(bot.win, "\n");
465 waddstr(bot.win, msg);
469 * print formated output to bot win and refresh
471 __printf_2_3 static void outputf(int color, const char* fmt,...)
477 PARA_VSPRINTF(fmt, msg);
478 rb_add_entry(color, msg);
482 static int add_output_line(char *line, __a_unused void *data)
486 rb_add_entry(COLOR_OUTPUT, para_strdup(line));
492 __printf_2_3 void curses_log(int ll, const char *fmt,...)
497 if (ll < loglevel || !curses_active)
506 color = COLOR_ERRMSG;
508 PARA_VSPRINTF(fmt, msg);
510 rb_add_entry(color, msg);
513 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
515 static void setup_signal_handling(void)
517 signal_pipe = para_signal_init();
518 para_install_sighandler(SIGINT);
519 para_install_sighandler(SIGTERM);
520 para_install_sighandler(SIGCHLD);
521 para_install_sighandler(SIGWINCH);
522 para_install_sighandler(SIGUSR1);
523 para_sigaction(SIGHUP, SIG_IGN);
526 __noreturn static void do_exit(int ret)
528 para_sigaction(SIGTERM, SIG_IGN);
533 static void shutdown_curses(void)
542 __noreturn static void finish(int ret)
549 * exit curses and print given message to stdout/stderr
551 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
554 FILE *outfd = ret? stderr: stdout;
558 vfprintf(outfd, fmt, argp);
563 static void print_welcome(void)
565 if (loglevel > LL_NOTICE)
567 outputf(COLOR_WELCOME, "Welcome to para_gui " PACKAGE_VERSION
568 " \"" CODENAME "\". Theme: %s", theme.name);
575 static void init_wins(int top_lines)
579 top.lines = top_lines;
584 bot.lines = LINES - top.lines - 3;
586 bot.begy = top.lines + 1;
601 sep.begy = top.lines;
604 assume_default_colors(theme.default_fg, theme.default_bg);
606 mvwin(top.win, top.begy, top.begx);
607 wresize(top.win, top.lines, top.cols);
609 mvwin(sb.win, sb.begy, sb.begx);
610 wresize(sb.win, sb.lines, sb.cols);
612 mvwin(sep.win, sep.begy, sep.begx);
613 wresize(sep.win, sep.lines, sep.cols);
615 mvwin(bot.win, bot.begy, bot.begx);
616 wresize(bot.win, bot.lines, bot.cols);
618 mvwin(in.win, in.begy, in.begx);
619 wresize(in.win, in.lines, in.cols);
621 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
622 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
623 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
624 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
625 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
626 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
627 msg_n_exit(1, "Error: Cannot create curses windows\n");
631 scrollok(bot.win, 1);
632 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
633 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
634 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
635 wattron(top.win, COLOR_PAIR(COLOR_TOP));
647 wmove(sep.win, 0, 0);
648 for (i = 1; i <= COLS; i++)
649 waddstr(sep.win, theme.sep_str);
652 wnoutrefresh(top.win);
653 wnoutrefresh(bot.win);
654 //wnoutrefresh(sb.win);
656 wnoutrefresh(in.win);
657 wnoutrefresh(sep.win);
662 * Print stat item #i to curses window
664 static void print_stat_item(int i)
667 struct stat_item_data d = theme.data[i];
668 char *c = stat_content[i];
670 if (!curses_active || !d.len || !c)
672 tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
673 wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
675 wattron(top.win, COLOR_PAIR(i + 1));
676 align_str(top.win, tmp, d.len * COLS / 100, d.align);
681 static int update_item(int item_num, char *buf)
683 char **c = stat_content + item_num;
690 *c = para_strdup("(artist tag not set)");
693 *c = para_strdup("(title tag not set)");
696 *c = para_strdup("????");
699 *c = para_strdup("(album tag not set)");
702 *c = para_strdup("(comment tag not set)");
706 *c = para_strdup(buf);
708 print_stat_item(item_num);
712 static int read_stat_pipe(fd_set *rfds)
715 static int bufsize, loaded;
721 if (loaded >= bufsize) {
722 if (bufsize > 1000 * 1000) {
726 bufsize += bufsize + 1000;
727 buf = para_realloc(buf, bufsize);
729 assert(loaded < bufsize);
730 ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
733 ret2 = for_each_stat_item(buf, loaded, update_item);
734 if (ret < 0 || ret2 < 0) {
736 return ret2 < 0? ret2 : ret;
738 sz = ret2; /* what is left */
739 if (sz > 0 && sz < loaded)
740 memmove(buf, buf + loaded - sz, sz);
745 static void print_all_items(void)
751 FOR_EACH_STATUS_ITEM(i)
755 static void clear_all_items(void)
759 FOR_EACH_STATUS_ITEM(i) {
760 free(stat_content[i]);
761 stat_content[i] = para_strdup("");
765 static void init_pair_or_die(short pair, short f, short b)
767 if (init_pair(pair, f, b) == ERR)
768 msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
771 static void init_colors_or_die(void)
776 msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
777 if (start_color() == ERR)
778 msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
779 FOR_EACH_STATUS_ITEM(i)
780 if (theme.data[i].len)
781 init_pair_or_die(i + 1, theme.data[i].fg,
783 init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
784 init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
785 init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
786 init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
787 init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
788 init_pair_or_die(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
789 init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
790 init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
791 init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
794 /* (Re-)initialize the curses library. */
795 static void init_curses(void)
798 if (top.win && refresh() == ERR) /* refesh is really needed */
799 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
800 if (LINES < theme.lines_min || COLS < theme.cols_min)
801 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
802 " (need at least %dx%d)\n", COLS, LINES,
803 theme.cols_min, theme.lines_min);
804 curs_set(0); /* make cursor invisible, ignore errors */
805 nonl(); /* do not NL->CR/NL on output, always returns OK */
806 /* don't echo input */
808 msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
809 /* take input chars one at a time, no wait for \n */
811 msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
812 init_colors_or_die();
813 clear(); /* ignore non-fatal errors */
814 init_wins(theme.top_lines_default);
816 // noecho(); /* don't echo input */
819 static void check_sigchld(void)
824 ret = para_reap_child(&pid);
827 if (pid == cmd_pid) {
831 goto reap_next_child;
835 * This sucker modifies its first argument. *handler and *arg are
836 * pointers to 0-terminated strings (inside line). Crap.
838 static int split_key_map(char *line, char **handler, char **arg)
840 if (!(*handler = strchr(line + 1, ':')))
844 if (!(*arg = strchr(*handler, ':')))
853 static int check_key_map_args(void)
857 char *tmp = NULL, *handler, *arg;
859 for (i = 0; i < conf.key_map_given; ++i) {
860 s = conf.key_map_arg[i];
864 tmp = para_strdup(s);
865 if (!split_key_map(tmp, &handler, &arg))
867 if (strlen(handler) != 1)
876 if (find_cmd_byname(arg) < 0)
886 * React to various signal-related events
888 static void handle_signal(int sig)
892 msg_n_exit(EXIT_FAILURE,
893 "only the good die young (caught SIGTERM))\n");
903 PARA_WARNING_LOG("caught SIGINT, reset");
904 /* Nothing to do. SIGINT killed our child which gets noticed
905 * by do_select and resets everything.
909 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration");
918 static int open_stat_pipe(void)
921 int ret, fds[3] = {0, 1, 0};
928 * Sleep a bit to avoid a busy loop. As the call to sleep() may
929 * be interrupted by SIGCHLD, we simply wait until the call
934 ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
937 ret = mark_fd_nonblocking(fds[1]);
945 * This is the core select loop. Besides the (internal) signal
946 * pipe, the following other fds are checked according to the mode:
948 * GETCH_MODE: check stdin, return when key is pressed
950 * COMMAND_MODE: check command_pipe and stdin. Return when a screen full
951 * of output has been read or when other end has closed command pipe or
952 * when any key is pressed.
954 * EXTERNAL_MODE: Check only signal pipe. Used when an external command
955 * is running. During that time curses is disabled. Returns when
958 static int do_select(int mode)
963 char command_buf[4096] = "";
964 int cbo = 0; /* command buf offset */
967 tv.tv_sec = conf.timeout_arg / 1000;
968 tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
969 // ret = refresh_status();
973 stat_pipe = open_stat_pipe();
975 para_fd_set(stat_pipe, &rfds, &max_fileno);
977 para_fd_set(signal_pipe, &rfds, &max_fileno);
978 /* command pipe only for COMMAND_MODE */
979 if (command_pipe >= 0 && mode == COMMAND_MODE)
980 para_fd_set(command_pipe, &rfds, &max_fileno);
981 ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
983 goto check_return; /* skip fd checks */
985 ret = para_next_signal(&rfds);
988 /* read command pipe if ready */
989 if (command_pipe >= 0 && mode == COMMAND_MODE) {
991 ret = read_nonblock(command_pipe, command_buf + cbo,
992 sizeof(command_buf) - 1 - cbo, &rfds, &sz);
995 cbo = for_each_line(command_buf, cbo, &add_output_line, NULL);
999 PARA_NOTICE_LOG("closing command pipe: %s",
1000 para_strerror(-ret));
1001 close(command_pipe);
1006 ret = read_stat_pipe(&rfds);
1008 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1012 free(stat_content[SI_BASENAME]);
1013 stat_content[SI_BASENAME] =
1014 para_strdup("stat command terminated!?");
1020 ret = wgetch(top.win);
1021 if (ret != ERR && ret != KEY_RESIZE) {
1023 close(command_pipe);
1027 kill(cmd_pid, SIGTERM);
1032 ret = wgetch(top.win);
1033 if (ret != ERR && ret != KEY_RESIZE)
1046 * read from command pipe and print data to bot window
1048 static int send_output(void)
1052 if (command_pipe < 0)
1054 ret = mark_fd_nonblocking(command_pipe);
1056 close(command_pipe);
1059 if (do_select(COMMAND_MODE) >= 0)
1060 PARA_INFO_LOG("command complete");
1062 PARA_NOTICE_LOG("command aborted");
1063 print_in_bar(COLOR_MSG, " ");
1067 static int client_cmd_cmdline(char *cmd)
1069 int ret, fds[3] = {0, 1, 0};
1070 char *c = make_message(BINDIR "/para_client -- %s", cmd);
1072 outputf(COLOR_COMMAND, "%s", c);
1073 print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1074 ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
1078 command_pipe = fds[1];
1079 return send_output();
1083 * exec command and print output to bot win
1085 static int display_cmd(char *cmd)
1087 int fds[3] = {0, 1, 0};
1089 print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1090 outputf(COLOR_COMMAND, "%s", cmd);
1091 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1093 command_pipe = fds[1];
1094 return send_output();
1098 * shutdown curses and stat pipe before executing external commands
1100 static int external_cmd(char *cmd)
1102 int fds[3] = {-1, -1, -1};
1107 para_exec_cmdline_pid(&cmd_pid, cmd, fds);
1109 do_select(EXTERNAL_MODE);
1114 static void print_scroll_msg(void)
1116 unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1117 int first_rbe = first_visible_rbe(&lines_total);
1118 print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1119 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1122 static void com_scroll_top(void)
1124 int i = RINGBUFFER_SIZE - 1;
1127 while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1129 /* i is oldest entry */
1130 for (; lines < bot.lines && i >= 0; i--) {
1131 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1134 lines += NUM_LINES(strlen(rbe->msg));
1137 if (lines > 0 && scroll_position != i) {
1138 scroll_position = i;
1143 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1146 static void com_cancel_scrolling(void)
1149 if (scroll_position == 0) {
1150 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1153 scroll_position = 0;
1157 static void com_page_down(void)
1160 int i = scroll_position;
1161 while (lines < bot.lines && --i > 0) {
1162 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1165 lines += NUM_LINES(strlen(rbe->msg));
1168 scroll_position = i;
1173 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1176 static void com_page_up(void)
1179 int fvr = first_visible_rbe(&lines);
1181 if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1182 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1185 scroll_position = fvr + 1;
1186 for (; scroll_position > 0; scroll_position--) {
1187 first_visible_rbe(&lines);
1188 if (lines == bot.lines)
1195 static void com_scroll_down(void)
1197 struct rb_entry *rbe;
1200 if (!scroll_position) {
1201 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1205 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1206 rbe_lines = NUM_LINES(rbe->len);
1207 wscrl(bot.win, rbe_lines);
1208 wmove(bot.win, bot.lines - rbe_lines, 0);
1209 wattron(bot.win, COLOR_PAIR(rbe->color));
1210 waddstr(bot.win, rbe->msg);
1215 static void com_scroll_up(void)
1217 struct rb_entry *rbe = NULL;
1219 int i, first_rbe, num_scroll;
1221 /* the entry that is going to vanish */
1222 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1225 num_scroll = NUM_LINES(rbe->len);
1226 first_rbe = first_visible_rbe(&lines);
1227 if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1230 wscrl(bot.win, -num_scroll);
1231 i = draw_top_rbe(&lines);
1234 while (i > 0 && lines < num_scroll) {
1236 rbe = ringbuffer_get(bot_win_rb, --i);
1239 rbe_lines = NUM_LINES(rbe->len);
1241 // fprintf(stderr, "msg: %s\n", rbe->msg);
1242 wattron(bot.win, COLOR_PAIR(rbe->color));
1243 waddstr(bot.win, "\n");
1244 waddstr(bot.win, rbe->msg);
1253 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1256 static void com_ll_decr(void)
1258 if (loglevel <= LL_DEBUG) {
1259 print_in_bar(COLOR_ERRMSG,
1260 "loglevel already at maximal verbosity\n");
1264 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1267 static void com_ll_incr(void)
1269 if (loglevel >= LL_EMERG) {
1270 print_in_bar(COLOR_ERRMSG,
1271 "loglevel already at minimal verbosity\n");
1275 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1279 * reread configuration, terminate on errors
1281 static void com_reread_conf(void)
1283 char *cf =configfile_exists();
1284 struct gui_cmdline_parser_params params = {
1287 .check_required = 0,
1288 .check_ambiguity = 0,
1293 PARA_WARNING_LOG("there is no configuration to read");
1296 PARA_INFO_LOG("rereading command line options and config file");
1297 gui_cmdline_parser_ext(_argc, _argv, &conf, ¶ms);
1298 if (gui_cmdline_parser_config_file(cf, &conf, ¶ms) != 0) {
1299 PARA_EMERG_LOG("errors in config file");
1300 finish(EXIT_FAILURE);
1302 PARA_NOTICE_LOG("config file reloaded");
1303 if (check_key_map_args() < 0)
1304 finish(EXIT_FAILURE);
1307 static void com_help(void)
1311 for (i = 0; i < conf.key_map_given; ++i) {
1312 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1313 const char *handler_text = "???", *desc = NULL;
1315 if (!split_key_map(tmp, &handler, &arg)) {
1321 handler_text = "internal";
1322 desc = command_list[find_cmd_byname(arg)].description;
1324 case 'x': handler_text = "external"; break;
1325 case 'd': handler_text = "display "; break;
1326 case 'p': handler_text = "para "; break;
1328 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1329 strlen(arg) < 8? "\t" : "",
1333 for (i = 0; command_list[i].handler; i++) {
1334 struct gui_command gc = command_list[i];
1336 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1337 strlen(gc.name) < 8? "\t" : "",
1340 print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1344 static void com_shrink_top_win(void)
1346 if (top.lines <= theme.top_lines_min) {
1347 PARA_WARNING_LOG("can not decrease top window");
1350 init_wins(top.lines - 1);
1353 print_in_bar(COLOR_MSG, "%s", "decreased top window");
1356 static void com_enlarge_top_win(void)
1358 if (bot.lines < 3) {
1359 PARA_WARNING_LOG("can not increase top window");
1362 init_wins(top.lines + 1);
1365 print_in_bar(COLOR_MSG, "increased top window");
1368 static void com_version(void)
1370 print_in_bar(COLOR_MSG, "para_gui " PACKAGE_VERSION " \""
1374 __noreturn static void com_quit(void)
1379 static void com_refresh(void)
1385 static void change_theme(int next)
1391 /* This seems to be needed twice, why? */
1394 PARA_NOTICE_LOG("new theme: %s", theme.name);
1397 static void com_next_theme(void)
1402 static void com_prev_theme(void)
1408 static void handle_command(int c)
1412 /* first check user's key bindings */
1413 for (i = 0; i < conf.key_map_given; ++i) {
1414 char *tmp, *handler, *arg;
1416 tmp = para_strdup(conf.key_map_arg[i]);
1417 if (!split_key_map(tmp, &handler, &arg)) {
1421 if (strcmp(tmp, km_keyname(c))) {
1425 if (*handler == 'd')
1427 else if (*handler == 'x')
1429 else if (*handler == 'p')
1430 client_cmd_cmdline(arg);
1431 else if (*handler == 'i') {
1432 int num = find_cmd_byname(arg);
1434 command_list[num].handler();
1439 /* not found, check internal key bindings */
1440 for (i = 0; command_list[i].handler; i++) {
1441 if (!strcmp(km_keyname(c), command_list[i].key)) {
1442 command_list[i].handler();
1446 print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1450 int main(int argc, char *argv[])
1458 if (gui_cmdline_parser(argc, argv, &conf) != 0)
1460 HANDLE_VERSION_FLAG("gui", conf);
1461 cf = configfile_exists();
1462 if (!cf && conf.config_file_given) {
1463 fprintf(stderr, "can not read config file %s\n",
1464 conf.config_file_arg);
1468 struct gui_cmdline_parser_params params = {
1471 .check_required = 0,
1472 .check_ambiguity = 0,
1475 if (gui_cmdline_parser_config_file(cf, &conf, ¶ms) != 0)
1478 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1479 if (check_key_map_args() < 0) {
1480 fprintf(stderr, "invalid key map\n");
1483 init_theme_or_die(conf.theme_arg, &theme);
1484 top.lines = theme.top_lines_default;
1485 setup_signal_handling();
1486 bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1487 initscr(); /* needed only once, always successful */
1492 ret = do_select(GETCH_MODE);
1495 print_in_bar(COLOR_MSG, " ");
1496 handle_command(ret);