2 * Copyright (C) 1998-2011 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 para_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);
514 static void setup_signal_handling(void)
516 signal_pipe = para_signal_init();
517 para_install_sighandler(SIGINT);
518 para_install_sighandler(SIGTERM);
519 para_install_sighandler(SIGCHLD);
520 para_install_sighandler(SIGWINCH);
521 para_install_sighandler(SIGUSR1);
522 para_sigaction(SIGHUP, SIG_IGN);
525 __noreturn static void do_exit(int ret)
527 para_sigaction(SIGTERM, SIG_IGN);
532 static void shutdown_curses(void)
541 __noreturn static void finish(int ret)
548 * exit curses and print given message to stdout/stderr
550 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
553 FILE *outfd = ret? stderr: stdout;
557 vfprintf(outfd, fmt, argp);
562 static void print_welcome(void)
564 if (loglevel > LL_NOTICE)
566 outputf(COLOR_WELCOME, "Welcome to para_gui " PACKAGE_VERSION
567 " \"" CODENAME "\". Theme: %s", theme.name);
574 static void init_wins(int top_lines)
578 top.lines = top_lines;
583 bot.lines = LINES - top.lines - 3;
585 bot.begy = top.lines + 1;
600 sep.begy = top.lines;
603 assume_default_colors(theme.default_fg, theme.default_bg);
605 mvwin(top.win, top.begy, top.begx);
606 wresize(top.win, top.lines, top.cols);
608 mvwin(sb.win, sb.begy, sb.begx);
609 wresize(sb.win, sb.lines, sb.cols);
611 mvwin(sep.win, sep.begy, sep.begx);
612 wresize(sep.win, sep.lines, sep.cols);
614 mvwin(bot.win, bot.begy, bot.begx);
615 wresize(bot.win, bot.lines, bot.cols);
617 mvwin(in.win, in.begy, in.begx);
618 wresize(in.win, in.lines, in.cols);
620 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
621 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
622 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
623 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
624 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
625 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
626 msg_n_exit(1, "Error: Cannot create curses windows\n");
630 scrollok(bot.win, 1);
631 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
632 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
633 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
634 wattron(top.win, COLOR_PAIR(COLOR_TOP));
646 wmove(sep.win, 0, 0);
647 for (i = 1; i <= COLS; i++)
648 waddstr(sep.win, theme.sep_str);
651 wnoutrefresh(top.win);
652 wnoutrefresh(bot.win);
653 //wnoutrefresh(sb.win);
655 wnoutrefresh(in.win);
656 wnoutrefresh(sep.win);
661 * Print stat item #i to curses window
663 static void print_stat_item(int i)
666 struct stat_item_data d = theme.data[i];
667 char *c = stat_content[i];
669 if (!curses_active || !d.len || !c)
671 tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
672 wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
674 wattron(top.win, COLOR_PAIR(i + 1));
675 align_str(top.win, tmp, d.len * COLS / 100, d.align);
680 static int update_item(int item_num, char *buf)
682 char **c = stat_content + item_num;
689 *c = para_strdup("(artist tag not set)");
692 *c = para_strdup("(title tag not set)");
695 *c = para_strdup("????");
698 *c = para_strdup("(album tag not set)");
701 *c = para_strdup("(comment tag not set)");
705 *c = para_strdup(buf);
707 print_stat_item(item_num);
711 static int read_stat_pipe(fd_set *rfds)
714 static int bufsize, loaded;
720 if (loaded >= bufsize) {
721 if (bufsize > 1000 * 1000) {
725 bufsize += bufsize + 1000;
726 buf = para_realloc(buf, bufsize);
728 assert(loaded < bufsize);
729 ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
732 ret2 = for_each_stat_item(buf, loaded, update_item);
733 if (ret < 0 || ret2 < 0) {
735 return ret2 < 0? ret2 : ret;
737 sz = ret2; /* what is left */
738 if (sz > 0 && sz < loaded)
739 memmove(buf, buf + loaded - sz, sz);
744 static void print_all_items(void)
750 FOR_EACH_STATUS_ITEM(i)
754 static void clear_all_items(void)
758 FOR_EACH_STATUS_ITEM(i) {
759 free(stat_content[i]);
760 stat_content[i] = para_strdup("");
764 static void init_pair_or_die(short pair, short f, short b)
766 if (init_pair(pair, f, b) == ERR)
767 msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
770 static void init_colors_or_die(void)
775 msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
776 if (start_color() == ERR)
777 msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
778 FOR_EACH_STATUS_ITEM(i)
779 if (theme.data[i].len)
780 init_pair_or_die(i + 1, theme.data[i].fg,
782 init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
783 init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
784 init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
785 init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
786 init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
787 init_pair_or_die(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
788 init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
789 init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
790 init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
793 /* (Re-)initialize the curses library. */
794 static void init_curses(void)
797 if (top.win && refresh() == ERR) /* refesh is really needed */
798 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
799 if (LINES < theme.lines_min || COLS < theme.cols_min)
800 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
801 " (need at least %dx%d)\n", COLS, LINES,
802 theme.cols_min, theme.lines_min);
803 curs_set(0); /* make cursor invisible, ignore errors */
804 nonl(); /* do not NL->CR/NL on output, always returns OK */
805 /* don't echo input */
807 msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
808 /* take input chars one at a time, no wait for \n */
810 msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
811 init_colors_or_die();
812 clear(); /* ignore non-fatal errors */
813 init_wins(theme.top_lines_default);
815 // noecho(); /* don't echo input */
818 static void check_sigchld(void)
823 ret = para_reap_child(&pid);
826 if (pid == cmd_pid) {
830 goto reap_next_child;
834 * This sucker modifies its first argument. *handler and *arg are
835 * pointers to 0-terminated strings (inside line). Crap.
837 static int split_key_map(char *line, char **handler, char **arg)
839 if (!(*handler = strchr(line + 1, ':')))
843 if (!(*arg = strchr(*handler, ':')))
852 static int check_key_map_args(void)
856 char *tmp = NULL, *handler, *arg;
858 for (i = 0; i < conf.key_map_given; ++i) {
859 s = conf.key_map_arg[i];
863 tmp = para_strdup(s);
864 if (!split_key_map(tmp, &handler, &arg))
866 if (strlen(handler) != 1)
875 if (find_cmd_byname(arg) < 0)
885 * React to various signal-related events
887 static void handle_signal(int sig)
891 msg_n_exit(EXIT_FAILURE,
892 "only the good die young (caught SIGTERM))\n");
902 PARA_WARNING_LOG("caught SIGINT, reset");
903 /* Nothing to do. SIGINT killed our child which gets noticed
904 * by do_select and resets everything.
908 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration");
917 static int open_stat_pipe(void)
920 int ret, fds[3] = {0, 1, 0};
927 * Sleep a bit to avoid a busy loop. As the call to sleep() may
928 * be interrupted by SIGCHLD, we simply wait until the call
933 ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
936 ret = mark_fd_nonblocking(fds[1]);
944 * This is the core select loop. Besides the (internal) signal
945 * pipe, the following other fds are checked according to the mode:
947 * GETCH_MODE: check stdin, return when key is pressed
949 * COMMAND_MODE: check command_pipe and stdin. Return when a screen full
950 * of output has been read or when other end has closed command pipe or
951 * when any key is pressed.
953 * EXTERNAL_MODE: Check only signal pipe. Used when an external command
954 * is running. During that time curses is disabled. Returns when
957 static int do_select(int mode)
962 char command_buf[4096] = "";
963 int cbo = 0; /* command buf offset */
966 tv.tv_sec = conf.timeout_arg / 1000;
967 tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
968 // ret = refresh_status();
972 stat_pipe = open_stat_pipe();
974 para_fd_set(stat_pipe, &rfds, &max_fileno);
976 para_fd_set(signal_pipe, &rfds, &max_fileno);
977 /* command pipe only for COMMAND_MODE */
978 if (command_pipe >= 0 && mode == COMMAND_MODE)
979 para_fd_set(command_pipe, &rfds, &max_fileno);
980 ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
982 goto check_return; /* skip fd checks */
984 ret = para_next_signal(&rfds);
987 /* read command pipe if ready */
988 if (command_pipe >= 0 && mode == COMMAND_MODE) {
990 ret = read_nonblock(command_pipe, command_buf + cbo,
991 sizeof(command_buf) - 1 - cbo, &rfds, &sz);
994 cbo = for_each_line(command_buf, cbo, &add_output_line, NULL);
998 PARA_NOTICE_LOG("closing command pipe: %s",
999 para_strerror(-ret));
1000 close(command_pipe);
1005 ret = read_stat_pipe(&rfds);
1007 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1011 free(stat_content[SI_BASENAME]);
1012 stat_content[SI_BASENAME] =
1013 para_strdup("stat command terminated!?");
1019 ret = wgetch(top.win);
1020 if (ret != ERR && ret != KEY_RESIZE) {
1022 close(command_pipe);
1026 kill(cmd_pid, SIGTERM);
1031 ret = wgetch(top.win);
1032 if (ret != ERR && ret != KEY_RESIZE)
1045 * read from command pipe and print data to bot window
1047 static int send_output(void)
1051 if (command_pipe < 0)
1053 ret = mark_fd_nonblocking(command_pipe);
1055 close(command_pipe);
1058 if (do_select(COMMAND_MODE) >= 0)
1059 PARA_INFO_LOG("command complete");
1061 PARA_NOTICE_LOG("command aborted");
1062 print_in_bar(COLOR_MSG, " ");
1066 static int client_cmd_cmdline(char *cmd)
1068 int ret, fds[3] = {0, 1, 0};
1069 char *c = make_message(BINDIR "/para_client -- %s", cmd);
1071 outputf(COLOR_COMMAND, "%s", c);
1072 print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1073 ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
1077 command_pipe = fds[1];
1078 return send_output();
1082 * exec command and print output to bot win
1084 static int display_cmd(char *cmd)
1086 int fds[3] = {0, 1, 0};
1088 print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1089 outputf(COLOR_COMMAND, "%s", cmd);
1090 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1092 command_pipe = fds[1];
1093 return send_output();
1097 * shutdown curses and stat pipe before executing external commands
1099 static int external_cmd(char *cmd)
1101 int fds[3] = {-1, -1, -1};
1106 para_exec_cmdline_pid(&cmd_pid, cmd, fds);
1108 do_select(EXTERNAL_MODE);
1113 static void print_scroll_msg(void)
1115 unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1116 int first_rbe = first_visible_rbe(&lines_total);
1117 print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1118 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1121 static void com_scroll_top(void)
1123 int i = RINGBUFFER_SIZE - 1;
1126 while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1128 /* i is oldest entry */
1129 for (; lines < bot.lines && i >= 0; i--) {
1130 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1133 lines += NUM_LINES(strlen(rbe->msg));
1136 if (lines > 0 && scroll_position != i) {
1137 scroll_position = i;
1142 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1145 static void com_cancel_scrolling(void)
1148 if (scroll_position == 0) {
1149 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1152 scroll_position = 0;
1156 static void com_page_down(void)
1159 int i = scroll_position;
1160 while (lines < bot.lines && --i > 0) {
1161 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1164 lines += NUM_LINES(strlen(rbe->msg));
1167 scroll_position = i;
1172 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1175 static void com_page_up(void)
1178 int fvr = first_visible_rbe(&lines);
1180 if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1181 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1184 scroll_position = fvr + 1;
1185 for (; scroll_position > 0; scroll_position--) {
1186 first_visible_rbe(&lines);
1187 if (lines == bot.lines)
1194 static void com_scroll_down(void)
1196 struct rb_entry *rbe;
1199 if (!scroll_position) {
1200 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1204 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1205 rbe_lines = NUM_LINES(rbe->len);
1206 wscrl(bot.win, rbe_lines);
1207 wmove(bot.win, bot.lines - rbe_lines, 0);
1208 wattron(bot.win, COLOR_PAIR(rbe->color));
1209 waddstr(bot.win, rbe->msg);
1214 static void com_scroll_up(void)
1216 struct rb_entry *rbe = NULL;
1218 int i, first_rbe, num_scroll;
1220 /* the entry that is going to vanish */
1221 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1224 num_scroll = NUM_LINES(rbe->len);
1225 first_rbe = first_visible_rbe(&lines);
1226 if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1229 wscrl(bot.win, -num_scroll);
1230 i = draw_top_rbe(&lines);
1233 while (i > 0 && lines < num_scroll) {
1235 rbe = ringbuffer_get(bot_win_rb, --i);
1238 rbe_lines = NUM_LINES(rbe->len);
1240 // fprintf(stderr, "msg: %s\n", rbe->msg);
1241 wattron(bot.win, COLOR_PAIR(rbe->color));
1242 waddstr(bot.win, "\n");
1243 waddstr(bot.win, rbe->msg);
1252 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1255 static void com_ll_decr(void)
1257 if (loglevel <= LL_DEBUG) {
1258 print_in_bar(COLOR_ERRMSG,
1259 "loglevel already at maximal verbosity\n");
1263 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1266 static void com_ll_incr(void)
1268 if (loglevel >= LL_EMERG) {
1269 print_in_bar(COLOR_ERRMSG,
1270 "loglevel already at minimal verbosity\n");
1274 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1278 * reread configuration, terminate on errors
1280 static void com_reread_conf(void)
1282 char *cf =configfile_exists();
1283 struct gui_cmdline_parser_params params = {
1286 .check_required = 0,
1287 .check_ambiguity = 0,
1292 PARA_WARNING_LOG("there is no configuration to read");
1295 PARA_INFO_LOG("rereading command line options and config file");
1296 gui_cmdline_parser_ext(_argc, _argv, &conf, ¶ms);
1297 if (gui_cmdline_parser_config_file(cf, &conf, ¶ms) != 0) {
1298 PARA_EMERG_LOG("errors in config file");
1299 finish(EXIT_FAILURE);
1301 PARA_NOTICE_LOG("config file reloaded");
1302 if (check_key_map_args() < 0)
1303 finish(EXIT_FAILURE);
1306 static void com_help(void)
1310 for (i = 0; i < conf.key_map_given; ++i) {
1311 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1312 const char *handler_text = "???", *desc = NULL;
1314 if (!split_key_map(tmp, &handler, &arg)) {
1320 handler_text = "internal";
1321 desc = command_list[find_cmd_byname(arg)].description;
1323 case 'x': handler_text = "external"; break;
1324 case 'd': handler_text = "display "; break;
1325 case 'p': handler_text = "para "; break;
1327 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1328 strlen(arg) < 8? "\t" : "",
1332 for (i = 0; command_list[i].handler; i++) {
1333 struct gui_command gc = command_list[i];
1335 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1336 strlen(gc.name) < 8? "\t" : "",
1339 print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1343 static void com_shrink_top_win(void)
1345 if (top.lines <= theme.top_lines_min) {
1346 PARA_WARNING_LOG("can not decrease top window");
1349 init_wins(top.lines - 1);
1352 print_in_bar(COLOR_MSG, "%s", "decreased top window");
1355 static void com_enlarge_top_win(void)
1357 if (bot.lines < 3) {
1358 PARA_WARNING_LOG("can not increase top window");
1361 init_wins(top.lines + 1);
1364 print_in_bar(COLOR_MSG, "increased top window");
1367 static void com_version(void)
1369 print_in_bar(COLOR_MSG, "para_gui " PACKAGE_VERSION " \""
1373 __noreturn static void com_quit(void)
1378 static void com_refresh(void)
1384 static void change_theme(int next)
1390 /* This seems to be needed twice, why? */
1393 PARA_NOTICE_LOG("new theme: %s", theme.name);
1396 static void com_next_theme(void)
1401 static void com_prev_theme(void)
1407 static void handle_command(int c)
1411 /* first check user's key bindings */
1412 for (i = 0; i < conf.key_map_given; ++i) {
1413 char *tmp, *handler, *arg;
1415 tmp = para_strdup(conf.key_map_arg[i]);
1416 if (!split_key_map(tmp, &handler, &arg)) {
1420 if (strcmp(tmp, km_keyname(c))) {
1424 if (*handler == 'd')
1426 else if (*handler == 'x')
1428 else if (*handler == 'p')
1429 client_cmd_cmdline(arg);
1430 else if (*handler == 'i') {
1431 int num = find_cmd_byname(arg);
1433 command_list[num].handler();
1438 /* not found, check internal key bindings */
1439 for (i = 0; command_list[i].handler; i++) {
1440 if (!strcmp(km_keyname(c), command_list[i].key)) {
1441 command_list[i].handler();
1445 print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1449 int main(int argc, char *argv[])
1457 if (gui_cmdline_parser(argc, argv, &conf) != 0)
1459 HANDLE_VERSION_FLAG("gui", conf);
1460 cf = configfile_exists();
1461 if (!cf && conf.config_file_given) {
1462 fprintf(stderr, "can not read config file %s\n",
1463 conf.config_file_arg);
1467 struct gui_cmdline_parser_params params = {
1470 .check_required = 0,
1471 .check_ambiguity = 0,
1474 if (gui_cmdline_parser_config_file(cf, &conf, ¶ms) != 0)
1477 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1478 if (check_key_map_args() < 0) {
1479 fprintf(stderr, "invalid key map\n");
1482 init_theme_or_die(conf.theme_arg, &theme);
1483 top.lines = theme.top_lines_default;
1484 setup_signal_handling();
1485 bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1486 initscr(); /* needed only once, always successful */
1491 ret = do_select(GETCH_MODE);
1494 print_in_bar(COLOR_MSG, " ");
1495 handle_command(ret);