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,...)
343 wattron(in.win, COLOR_PAIR(color));
345 xvasprintf(&msg, fmt, ap);
348 align_str(in.win, msg, sb.cols, LEFT);
354 * update the status bar
356 static void print_status_bar(void)
362 tmp = para_strdup(STANDARD_STATUS_BAR);
364 align_str(sb.win, tmp, sb.cols, CENTER);
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.
374 static int first_visible_rbe(unsigned *lines)
378 for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
379 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
383 // fprintf(stderr, "found: %s\n", rbe->msg);
384 rbe_lines = NUM_LINES(rbe->len);
385 if (rbe_lines > bot.lines)
388 if (*lines >= bot.lines)
391 return RINGBUFFER_SIZE - 1;
394 static int draw_top_rbe(unsigned *lines)
397 int offset, fvr = first_visible_rbe(lines);
398 struct rb_entry *rbe;
402 wmove(bot.win, 0, 0);
403 rbe = ringbuffer_get(bot_win_rb, fvr);
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);
413 wattron(bot.win, COLOR_PAIR(rbe->color));
414 waddstr(bot.win, rbe->msg + offset);
415 *lines = NUM_LINES(len - offset);
419 static void redraw_bot_win(void)
424 wmove(bot.win, 0, 0);
426 i = draw_top_rbe(&lines);
429 while (i > 0 && lines < bot.lines) {
430 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
433 waddstr(bot.win, "\n");
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);
445 static void rb_add_entry(int color, char *msg)
447 struct rb_entry *old, *new = para_malloc(sizeof(struct rb_entry));
450 new->len = strlen(msg);
452 old = ringbuffer_add(bot_win_rb, new);
453 // fprintf(stderr, "added: %s\n", new->msg);
458 if (scroll_position) {
459 /* discard current scrolling, like xterm does */
464 wattron(bot.win, COLOR_PAIR(color));
465 getyx(bot.win, y, x);
467 waddstr(bot.win, "\n");
468 waddstr(bot.win, msg);
472 * print formated output to bot win and refresh
474 __printf_2_3 static void outputf(int color, const char* fmt,...)
482 xvasprintf(&msg, fmt, ap);
484 rb_add_entry(color, msg);
488 static int add_output_line(char *line, __a_unused void *data)
492 rb_add_entry(COLOR_OUTPUT, para_strdup(line));
498 __printf_2_3 void curses_log(int ll, const char *fmt,...)
504 if (ll < loglevel || !curses_active)
513 color = COLOR_ERRMSG;
516 xvasprintf(&msg, fmt, ap);
519 rb_add_entry(color, msg);
522 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
524 static void setup_signal_handling(void)
526 signal_pipe = para_signal_init();
527 para_install_sighandler(SIGINT);
528 para_install_sighandler(SIGTERM);
529 para_install_sighandler(SIGCHLD);
530 para_install_sighandler(SIGWINCH);
531 para_install_sighandler(SIGUSR1);
532 para_sigaction(SIGHUP, SIG_IGN);
535 __noreturn static void do_exit(int ret)
537 para_sigaction(SIGTERM, SIG_IGN);
542 static void shutdown_curses(void)
551 __noreturn static void finish(int ret)
558 * exit curses and print given message to stdout/stderr
560 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
563 FILE *outfd = ret? stderr: stdout;
567 vfprintf(outfd, fmt, argp);
572 static void print_welcome(void)
574 if (loglevel > LL_NOTICE)
576 outputf(COLOR_WELCOME, "Welcome to para_gui " PACKAGE_VERSION
577 " \"" CODENAME "\". Theme: %s", theme.name);
584 static void init_wins(int top_lines)
588 top.lines = top_lines;
593 bot.lines = LINES - top.lines - 3;
595 bot.begy = top.lines + 1;
610 sep.begy = top.lines;
613 assume_default_colors(theme.default_fg, theme.default_bg);
615 mvwin(top.win, top.begy, top.begx);
616 wresize(top.win, top.lines, top.cols);
618 mvwin(sb.win, sb.begy, sb.begx);
619 wresize(sb.win, sb.lines, sb.cols);
621 mvwin(sep.win, sep.begy, sep.begx);
622 wresize(sep.win, sep.lines, sep.cols);
624 mvwin(bot.win, bot.begy, bot.begx);
625 wresize(bot.win, bot.lines, bot.cols);
627 mvwin(in.win, in.begy, in.begx);
628 wresize(in.win, in.lines, in.cols);
630 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
631 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
632 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
633 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
634 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
635 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
636 msg_n_exit(1, "Error: Cannot create curses windows\n");
640 scrollok(bot.win, 1);
641 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
642 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
643 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
644 wattron(top.win, COLOR_PAIR(COLOR_TOP));
656 wmove(sep.win, 0, 0);
657 for (i = 1; i <= COLS; i++)
658 waddstr(sep.win, theme.sep_str);
661 wnoutrefresh(top.win);
662 wnoutrefresh(bot.win);
663 //wnoutrefresh(sb.win);
665 wnoutrefresh(in.win);
666 wnoutrefresh(sep.win);
671 * Print stat item #i to curses window
673 static void print_stat_item(int i)
676 struct stat_item_data d = theme.data[i];
677 char *c = stat_content[i];
679 if (!curses_active || !d.len || !c)
681 tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
682 wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
684 wattron(top.win, COLOR_PAIR(i + 1));
685 align_str(top.win, tmp, d.len * COLS / 100, d.align);
690 static int update_item(int item_num, char *buf)
692 char **c = stat_content + item_num;
699 *c = para_strdup("(artist tag not set)");
702 *c = para_strdup("(title tag not set)");
705 *c = para_strdup("????");
708 *c = para_strdup("(album tag not set)");
711 *c = para_strdup("(comment tag not set)");
715 *c = para_strdup(buf);
717 print_stat_item(item_num);
721 static int read_stat_pipe(fd_set *rfds)
724 static int bufsize, loaded;
730 if (loaded >= bufsize) {
731 if (bufsize > 1000 * 1000) {
735 bufsize += bufsize + 1000;
736 buf = para_realloc(buf, bufsize);
738 assert(loaded < bufsize);
739 ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
742 ret2 = for_each_stat_item(buf, loaded, update_item);
743 if (ret < 0 || ret2 < 0) {
745 return ret2 < 0? ret2 : ret;
747 sz = ret2; /* what is left */
748 if (sz > 0 && sz < loaded)
749 memmove(buf, buf + loaded - sz, sz);
754 static void print_all_items(void)
760 FOR_EACH_STATUS_ITEM(i)
764 static void clear_all_items(void)
768 FOR_EACH_STATUS_ITEM(i) {
769 free(stat_content[i]);
770 stat_content[i] = para_strdup("");
774 static void init_pair_or_die(short pair, short f, short b)
776 if (init_pair(pair, f, b) == ERR)
777 msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
780 static void init_colors_or_die(void)
785 msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
786 if (start_color() == ERR)
787 msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
788 FOR_EACH_STATUS_ITEM(i)
789 if (theme.data[i].len)
790 init_pair_or_die(i + 1, theme.data[i].fg,
792 init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
793 init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
794 init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
795 init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
796 init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
797 init_pair_or_die(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
798 init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
799 init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
800 init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
803 /* (Re-)initialize the curses library. */
804 static void init_curses(void)
807 if (top.win && refresh() == ERR) /* refesh is really needed */
808 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
809 if (LINES < theme.lines_min || COLS < theme.cols_min)
810 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
811 " (need at least %dx%d)\n", COLS, LINES,
812 theme.cols_min, theme.lines_min);
813 curs_set(0); /* make cursor invisible, ignore errors */
814 nonl(); /* do not NL->CR/NL on output, always returns OK */
815 /* don't echo input */
817 msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
818 /* take input chars one at a time, no wait for \n */
820 msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
821 init_colors_or_die();
822 clear(); /* ignore non-fatal errors */
823 init_wins(theme.top_lines_default);
825 // noecho(); /* don't echo input */
828 static void check_sigchld(void)
833 ret = para_reap_child(&pid);
836 if (pid == cmd_pid) {
840 goto reap_next_child;
844 * This sucker modifies its first argument. *handler and *arg are
845 * pointers to 0-terminated strings (inside line). Crap.
847 static int split_key_map(char *line, char **handler, char **arg)
849 if (!(*handler = strchr(line + 1, ':')))
853 if (!(*arg = strchr(*handler, ':')))
862 static int check_key_map_args(void)
866 char *tmp = NULL, *handler, *arg;
868 for (i = 0; i < conf.key_map_given; ++i) {
869 s = conf.key_map_arg[i];
873 tmp = para_strdup(s);
874 if (!split_key_map(tmp, &handler, &arg))
876 if (strlen(handler) != 1)
885 if (find_cmd_byname(arg) < 0)
895 * React to various signal-related events
897 static void handle_signal(int sig)
901 msg_n_exit(EXIT_FAILURE,
902 "only the good die young (caught SIGTERM))\n");
912 PARA_WARNING_LOG("caught SIGINT, reset");
913 /* Nothing to do. SIGINT killed our child which gets noticed
914 * by do_select and resets everything.
918 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration");
927 static int open_stat_pipe(void)
930 int ret, fds[3] = {0, 1, 0};
937 * Sleep a bit to avoid a busy loop. As the call to sleep() may
938 * be interrupted by SIGCHLD, we simply wait until the call
943 ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
946 ret = mark_fd_nonblocking(fds[1]);
954 * This is the core select loop. Besides the (internal) signal
955 * pipe, the following other fds are checked according to the mode:
957 * GETCH_MODE: check stdin, return when key is pressed
959 * COMMAND_MODE: check command_pipe and stdin. Return when a screen full
960 * of output has been read or when other end has closed command pipe or
961 * when any key is pressed.
963 * EXTERNAL_MODE: Check only signal pipe. Used when an external command
964 * is running. During that time curses is disabled. Returns when
967 static int do_select(int mode)
972 char command_buf[4096] = "";
973 int cbo = 0; /* command buf offset */
976 tv.tv_sec = conf.timeout_arg / 1000;
977 tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
978 // ret = refresh_status();
982 stat_pipe = open_stat_pipe();
984 para_fd_set(stat_pipe, &rfds, &max_fileno);
986 para_fd_set(signal_pipe, &rfds, &max_fileno);
987 /* command pipe only for COMMAND_MODE */
988 if (command_pipe >= 0 && mode == COMMAND_MODE)
989 para_fd_set(command_pipe, &rfds, &max_fileno);
990 ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
992 goto check_return; /* skip fd checks */
994 ret = para_next_signal(&rfds);
997 /* read command pipe if ready */
998 if (command_pipe >= 0 && mode == COMMAND_MODE) {
1000 ret = read_nonblock(command_pipe, command_buf + cbo,
1001 sizeof(command_buf) - 1 - cbo, &rfds, &sz);
1004 cbo = for_each_line(command_buf, cbo, &add_output_line, NULL);
1008 PARA_NOTICE_LOG("closing command pipe: %s",
1009 para_strerror(-ret));
1010 close(command_pipe);
1015 ret = read_stat_pipe(&rfds);
1017 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1021 free(stat_content[SI_BASENAME]);
1022 stat_content[SI_BASENAME] =
1023 para_strdup("stat command terminated!?");
1029 ret = wgetch(top.win);
1030 if (ret != ERR && ret != KEY_RESIZE) {
1032 close(command_pipe);
1036 kill(cmd_pid, SIGTERM);
1041 ret = wgetch(top.win);
1042 if (ret != ERR && ret != KEY_RESIZE)
1055 * read from command pipe and print data to bot window
1057 static void send_output(void)
1061 if (command_pipe < 0)
1063 ret = mark_fd_nonblocking(command_pipe);
1065 close(command_pipe);
1068 if (do_select(COMMAND_MODE) >= 0)
1069 PARA_INFO_LOG("command complete");
1071 PARA_NOTICE_LOG("command aborted");
1072 print_in_bar(COLOR_MSG, " ");
1075 static void client_cmd_cmdline(char *cmd)
1077 int ret, fds[3] = {0, 1, 0};
1078 char *c = make_message(BINDIR "/para_client -- %s", cmd);
1080 outputf(COLOR_COMMAND, "%s", c);
1081 print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1082 ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
1086 command_pipe = fds[1];
1091 * exec command and print output to bot win
1093 static void display_cmd(char *cmd)
1095 int fds[3] = {0, 1, 0};
1097 print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1098 outputf(COLOR_COMMAND, "%s", cmd);
1099 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1101 command_pipe = fds[1];
1106 * shutdown curses and stat pipe before executing external commands
1108 static void external_cmd(char *cmd)
1110 int fds[3] = {-1, -1, -1};
1115 para_exec_cmdline_pid(&cmd_pid, cmd, fds);
1117 do_select(EXTERNAL_MODE);
1121 static void print_scroll_msg(void)
1123 unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1124 int first_rbe = first_visible_rbe(&lines_total);
1125 print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1126 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1129 static void com_scroll_top(void)
1131 int i = RINGBUFFER_SIZE - 1;
1134 while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1136 /* i is oldest entry */
1137 for (; lines < bot.lines && i >= 0; i--) {
1138 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1141 lines += NUM_LINES(strlen(rbe->msg));
1144 if (lines > 0 && scroll_position != i) {
1145 scroll_position = i;
1150 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1153 static void com_cancel_scrolling(void)
1156 if (scroll_position == 0) {
1157 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1160 scroll_position = 0;
1164 static void com_page_down(void)
1167 int i = scroll_position;
1168 while (lines < bot.lines && --i > 0) {
1169 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1172 lines += NUM_LINES(strlen(rbe->msg));
1175 scroll_position = i;
1180 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1183 static void com_page_up(void)
1186 int fvr = first_visible_rbe(&lines);
1188 if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1189 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1192 scroll_position = fvr + 1;
1193 for (; scroll_position > 0; scroll_position--) {
1194 first_visible_rbe(&lines);
1195 if (lines == bot.lines)
1202 static void com_scroll_down(void)
1204 struct rb_entry *rbe;
1207 if (!scroll_position) {
1208 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1212 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1213 rbe_lines = NUM_LINES(rbe->len);
1214 wscrl(bot.win, rbe_lines);
1215 wmove(bot.win, bot.lines - rbe_lines, 0);
1216 wattron(bot.win, COLOR_PAIR(rbe->color));
1217 waddstr(bot.win, rbe->msg);
1222 static void com_scroll_up(void)
1224 struct rb_entry *rbe = NULL;
1226 int i, first_rbe, num_scroll;
1228 /* the entry that is going to vanish */
1229 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1232 num_scroll = NUM_LINES(rbe->len);
1233 first_rbe = first_visible_rbe(&lines);
1234 if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1237 wscrl(bot.win, -num_scroll);
1238 i = draw_top_rbe(&lines);
1241 while (i > 0 && lines < num_scroll) {
1243 rbe = ringbuffer_get(bot_win_rb, --i);
1246 rbe_lines = NUM_LINES(rbe->len);
1248 // fprintf(stderr, "msg: %s\n", rbe->msg);
1249 wattron(bot.win, COLOR_PAIR(rbe->color));
1250 waddstr(bot.win, "\n");
1251 waddstr(bot.win, rbe->msg);
1260 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1263 static void com_ll_decr(void)
1265 if (loglevel <= LL_DEBUG) {
1266 print_in_bar(COLOR_ERRMSG,
1267 "loglevel already at maximal verbosity\n");
1271 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1274 static void com_ll_incr(void)
1276 if (loglevel >= LL_EMERG) {
1277 print_in_bar(COLOR_ERRMSG,
1278 "loglevel already at minimal verbosity\n");
1282 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1286 * reread configuration, terminate on errors
1288 static void com_reread_conf(void)
1290 char *cf =configfile_exists();
1291 struct gui_cmdline_parser_params params = {
1294 .check_required = 0,
1295 .check_ambiguity = 0,
1300 PARA_WARNING_LOG("there is no configuration to read");
1303 PARA_INFO_LOG("rereading command line options and config file");
1304 gui_cmdline_parser_ext(_argc, _argv, &conf, ¶ms);
1305 if (gui_cmdline_parser_config_file(cf, &conf, ¶ms) != 0) {
1306 PARA_EMERG_LOG("errors in config file");
1307 finish(EXIT_FAILURE);
1309 PARA_NOTICE_LOG("config file reloaded");
1310 if (check_key_map_args() < 0)
1311 finish(EXIT_FAILURE);
1314 static void com_help(void)
1318 for (i = 0; i < conf.key_map_given; ++i) {
1319 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1320 const char *handler_text = "???", *desc = NULL;
1322 if (!split_key_map(tmp, &handler, &arg)) {
1328 handler_text = "internal";
1329 desc = command_list[find_cmd_byname(arg)].description;
1331 case 'x': handler_text = "external"; break;
1332 case 'd': handler_text = "display "; break;
1333 case 'p': handler_text = "para "; break;
1335 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1336 strlen(arg) < 8? "\t" : "",
1340 for (i = 0; command_list[i].handler; i++) {
1341 struct gui_command gc = command_list[i];
1343 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1344 strlen(gc.name) < 8? "\t" : "",
1347 print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1351 static void com_shrink_top_win(void)
1353 if (top.lines <= theme.top_lines_min) {
1354 PARA_WARNING_LOG("can not decrease top window");
1357 init_wins(top.lines - 1);
1360 print_in_bar(COLOR_MSG, "%s", "decreased top window");
1363 static void com_enlarge_top_win(void)
1365 if (bot.lines < 3) {
1366 PARA_WARNING_LOG("can not increase top window");
1369 init_wins(top.lines + 1);
1372 print_in_bar(COLOR_MSG, "increased top window");
1375 static void com_version(void)
1377 print_in_bar(COLOR_MSG, "para_gui " PACKAGE_VERSION " \""
1381 __noreturn static void com_quit(void)
1386 static void com_refresh(void)
1392 static void change_theme(int next)
1398 /* This seems to be needed twice, why? */
1401 PARA_NOTICE_LOG("new theme: %s", theme.name);
1404 static void com_next_theme(void)
1409 static void com_prev_theme(void)
1415 static void handle_command(int c)
1419 /* first check user's key bindings */
1420 for (i = 0; i < conf.key_map_given; ++i) {
1421 char *tmp, *handler, *arg;
1423 tmp = para_strdup(conf.key_map_arg[i]);
1424 if (!split_key_map(tmp, &handler, &arg)) {
1428 if (strcmp(tmp, km_keyname(c))) {
1432 if (*handler == 'd')
1434 else if (*handler == 'x')
1436 else if (*handler == 'p')
1437 client_cmd_cmdline(arg);
1438 else if (*handler == 'i') {
1439 int num = find_cmd_byname(arg);
1441 command_list[num].handler();
1446 /* not found, check internal key bindings */
1447 for (i = 0; command_list[i].handler; i++) {
1448 if (!strcmp(km_keyname(c), command_list[i].key)) {
1449 command_list[i].handler();
1453 print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1457 int main(int argc, char *argv[])
1465 if (gui_cmdline_parser(argc, argv, &conf) != 0)
1467 HANDLE_VERSION_FLAG("gui", conf);
1468 cf = configfile_exists();
1469 if (!cf && conf.config_file_given) {
1470 fprintf(stderr, "can not read config file %s\n",
1471 conf.config_file_arg);
1475 struct gui_cmdline_parser_params params = {
1478 .check_required = 0,
1479 .check_ambiguity = 0,
1482 if (gui_cmdline_parser_config_file(cf, &conf, ¶ms) != 0)
1485 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1486 if (check_key_map_args() < 0) {
1487 fprintf(stderr, "invalid key map\n");
1490 init_theme_or_die(conf.theme_arg, &theme);
1491 top.lines = theme.top_lines_default;
1492 setup_signal_handling();
1493 bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1494 initscr(); /* needed only once, always successful */
1499 ret = do_select(GETCH_MODE);
1502 print_in_bar(COLOR_MSG, " ");
1503 handle_command(ret);