2 * Copyright (C) 1998-2013 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 #define STANDARD_STATUS_BAR "para_gui " PACKAGE_VERSION " (hit ? for help)"
35 static int signal_pipe;
37 static struct win_data {
43 } top, bot, sb, in, sep;
45 #define RINGBUFFER_SIZE 512
51 static struct ringbuffer *bot_win_rb;
52 #define NUM_LINES(len) (1 + (len) / bot.cols)
54 static unsigned scroll_position;
56 static int curses_active;
59 static int command_fds[2];
60 static int stat_pipe = -1;
61 static struct gui_args_info conf;
63 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
66 #define COLOR_STATUSBAR 52
67 #define COLOR_COMMAND 53
68 #define COLOR_OUTPUT 54
70 #define COLOR_ERRMSG 56
71 #define COLOR_WELCOME 57
72 #define COLOR_SEPARATOR 58
79 const char *description;
80 void (*handler)(void);
86 char postfix[MAXLINE];
92 char content[MAXLINE];
95 static struct gui_theme theme;
100 static void com_help(void);
101 static void com_reread_conf(void);
102 static void com_enlarge_top_win(void);
103 static void com_shrink_top_win(void);
104 static void com_version(void);
105 __noreturn static void com_quit(void);
106 static void com_refresh(void);
107 static void com_ll_incr(void);
108 static void com_ll_decr(void);
109 static void com_prev_theme(void);
110 static void com_next_theme(void);
111 static void com_scroll_up(void);
112 static void com_scroll_down(void);
113 static void com_page_up(void);
114 static void com_page_down(void);
115 static void com_cancel_scrolling(void);
116 static void com_scroll_top(void);
118 static struct gui_command command_list[] = {
122 .description = "print help",
126 .name = "enlarge_win",
127 .description = "enlarge the top window",
128 .handler = com_enlarge_top_win
131 .name = "shrink_win",
132 .description = "shrink the top window",
133 .handler = com_shrink_top_win
136 .name = "reread_conf",
137 .description = "reread configuration file",
138 .handler = com_reread_conf
142 .description = "exit para_gui",
147 .description = "redraw the screen",
148 .handler = com_refresh
151 .name = "next_theme",
152 .description = "switch to next theme",
153 .handler = com_next_theme
156 .name = "prev_theme",
157 .description = "switch to previous stream",
158 .handler = com_prev_theme
162 .description = "increase loglevel (decreases verbosity)",
163 .handler = com_ll_incr
167 .description = "decrease loglevel (increases verbosity)",
168 .handler = com_ll_decr
172 .description = "show the para_gui version",
173 .handler = com_version
177 .description = "scroll up one line",
178 .handler = com_scroll_up
181 .name = "scroll_down",
182 .description = "scroll down one line",
183 .handler = com_scroll_down
187 .description = "scroll up one page",
188 .handler = com_page_up
192 .description = "scroll down one page",
193 .handler = com_page_down
196 .name = "scroll_top",
197 .description = "scroll to top of buffer",
198 .handler = com_scroll_top
201 .name = "cancel_scroll",
202 .description = "deactivate scroll mode",
203 .handler = com_cancel_scrolling
209 static int find_cmd_byname(char *name)
213 for (i = 0; command_list[i].handler; i++)
214 if (!strcmp(command_list[i].name, name))
219 /* taken from mutt */
220 static char *km_keyname(int c)
225 sprintf(buf, "<up>");
229 sprintf(buf, "<down>");
233 sprintf(buf, "<left>");
236 if (c == KEY_RIGHT) {
237 sprintf(buf, "<right>");
240 if (c == KEY_NPAGE) {
241 sprintf(buf, "<npage>");
244 if (c == KEY_PPAGE) {
245 sprintf(buf, "<ppage>");
249 sprintf(buf, "<home>");
253 sprintf(buf, "<end>");
256 if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
261 buf[1] = (c + '@') & 0x7f;
264 snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
265 (c >> 3) & 7, c & 7);
266 } else if (c >= KEY_F0 && c < KEY_F(256))
267 sprintf(buf, "<F%d>", c - KEY_F0);
269 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
271 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
275 static char *configfile_exists(void)
277 static char *config_file;
280 if (!conf.config_file_given) {
282 char *home = para_homedir();
283 config_file = make_message("%s/.paraslash/gui.conf",
289 tmp = conf.config_file_arg;
290 return file_exists(tmp)? tmp: NULL;
293 /* Print given number of spaces to curses window. */
294 static void add_spaces(WINDOW* win, unsigned int num)
297 unsigned sz = sizeof(space) - 1; /* number of spaces */
311 * print aligned string to curses window. This function always prints
314 static int align_str(WINDOW* win, char *str, unsigned int len,
317 int ret, i, num; /* of spaces */
322 ret = strwidth(str, &width);
324 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
333 /* replace control characters by spaces */
334 for (i = 0; i < len && str[i]; i++) {
335 if (str[i] == '\n' || str[i] == '\r' || str[i] == '\f')
340 add_spaces(win, num);
341 } else if (align == RIGHT) {
342 add_spaces(win, num);
345 add_spaces(win, num / 2);
346 waddstr(win, str[0]? str: "");
347 add_spaces(win, num - num / 2);
352 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
359 wattron(in.win, COLOR_PAIR(color));
361 xvasprintf(&msg, fmt, ap);
364 align_str(in.win, msg, sb.cols, LEFT);
370 * update the status bar
372 static void print_status_bar(void)
378 tmp = para_strdup(STANDARD_STATUS_BAR);
380 align_str(sb.win, tmp, sb.cols, CENTER);
386 * get the number of the oldest rbe that is (partially) visible. On return,
387 * lines contains the sum of the number of lines of all visable entries. If the
388 * first one is only partially visible, lines is greater than bot.lines.
390 static int first_visible_rbe(unsigned *lines)
394 for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
395 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
399 // fprintf(stderr, "found: %s\n", rbe->msg);
400 rbe_lines = NUM_LINES(rbe->len);
401 if (rbe_lines > bot.lines)
404 if (*lines >= bot.lines)
407 return RINGBUFFER_SIZE - 1;
411 returns number of first visible rbe, *lines is the number of lines drawn.
413 static int draw_top_rbe(unsigned *lines)
415 int ret, fvr = first_visible_rbe(lines);
416 struct rb_entry *rbe;
417 size_t bytes_to_skip, cells_to_skip, width;
421 wmove(bot.win, 0, 0);
422 rbe = ringbuffer_get(bot_win_rb, fvr);
425 if (*lines > bot.lines) {
426 /* rbe is partially visible multi-line */
427 cells_to_skip = (*lines - bot.lines) * bot.cols;
428 ret = skip_cells(rbe->msg, cells_to_skip, &bytes_to_skip);
431 ret = strwidth(rbe->msg + bytes_to_skip, &width);
438 wattron(bot.win, COLOR_PAIR(rbe->color));
439 waddstr(bot.win, rbe->msg + bytes_to_skip);
440 *lines = NUM_LINES(width);
444 static void redraw_bot_win(void)
449 wmove(bot.win, 0, 0);
451 i = draw_top_rbe(&lines);
454 while (i > 0 && lines < bot.lines) {
455 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
458 waddstr(bot.win, "\n");
461 lines += NUM_LINES(rbe->len);
462 wattron(bot.win, COLOR_PAIR(rbe->color));
463 waddstr(bot.win, "\n");
464 waddstr(bot.win, rbe->msg);
470 static void rb_add_entry(int color, char *msg)
472 struct rb_entry *old, *new;
476 if (strwidth(msg, &len) < 0)
478 new = para_malloc(sizeof(struct rb_entry));
482 old = ringbuffer_add(bot_win_rb, new);
483 // fprintf(stderr, "added: %s\n", new->msg);
488 if (scroll_position) {
489 /* discard current scrolling, like xterm does */
494 wattron(bot.win, COLOR_PAIR(color));
495 getyx(bot.win, y, x);
497 waddstr(bot.win, "\n");
498 waddstr(bot.win, msg);
502 * print formated output to bot win and refresh
504 __printf_2_3 static void outputf(int color, const char* fmt,...)
512 xvasprintf(&msg, fmt, ap);
514 rb_add_entry(color, msg);
518 static int add_output_line(char *line, void *data)
520 int color = *(int *)data? COLOR_ERRMSG : COLOR_OUTPUT;
523 rb_add_entry(color, para_strdup(line));
529 __printf_2_3 void curses_log(int ll, const char *fmt,...)
535 if (ll < loglevel || !curses_active)
544 color = COLOR_ERRMSG;
547 xvasprintf(&msg, fmt, ap);
550 rb_add_entry(color, msg);
553 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
555 static void setup_signal_handling(void)
557 signal_pipe = para_signal_init();
558 para_install_sighandler(SIGINT);
559 para_install_sighandler(SIGTERM);
560 para_install_sighandler(SIGCHLD);
561 para_install_sighandler(SIGWINCH);
562 para_install_sighandler(SIGUSR1);
565 /* kill every process in the process group and exit */
566 __noreturn static void kill_pg_and_die(int ret)
568 para_sigaction(SIGTERM, SIG_IGN);
573 static void shutdown_curses(void)
582 __noreturn static void finish(int ret)
585 kill_pg_and_die(ret);
589 * exit curses and print given message to stdout/stderr
591 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
594 FILE *outfd = ret? stderr: stdout;
598 vfprintf(outfd, fmt, argp);
600 kill_pg_and_die(ret);
603 static void print_welcome(void)
605 if (loglevel > LL_NOTICE)
607 outputf(COLOR_WELCOME, "Welcome to %s. Theme: %s",
608 version_single_line("gui"), theme.name);
615 static void init_wins(int top_lines)
619 top.lines = top_lines;
624 bot.lines = LINES - top.lines - 3;
626 bot.begy = top.lines + 1;
641 sep.begy = top.lines;
644 assume_default_colors(theme.default_fg, theme.default_bg);
646 mvwin(top.win, top.begy, top.begx);
647 wresize(top.win, top.lines, top.cols);
649 mvwin(sb.win, sb.begy, sb.begx);
650 wresize(sb.win, sb.lines, sb.cols);
652 mvwin(sep.win, sep.begy, sep.begx);
653 wresize(sep.win, sep.lines, sep.cols);
655 mvwin(bot.win, bot.begy, bot.begx);
656 wresize(bot.win, bot.lines, bot.cols);
658 mvwin(in.win, in.begy, in.begx);
659 wresize(in.win, in.lines, in.cols);
661 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
662 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
663 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
664 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
665 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
666 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
667 msg_n_exit(1, "Error: Cannot create curses windows\n");
671 scrollok(bot.win, 1);
672 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
673 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
674 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
675 wattron(top.win, COLOR_PAIR(COLOR_TOP));
687 wmove(sep.win, 0, 0);
688 for (i = 1; i <= COLS; i++)
689 waddstr(sep.win, theme.sep_str);
692 wnoutrefresh(top.win);
693 wnoutrefresh(bot.win);
694 //wnoutrefresh(sb.win);
696 wnoutrefresh(in.win);
697 wnoutrefresh(sep.win);
702 * Print stat item #i to curses window
704 static void print_stat_item(int i)
707 struct stat_item_data d = theme.data[i];
708 char *c = stat_content[i];
710 if (!curses_active || !d.len || !c)
712 tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
713 wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
715 wattron(top.win, COLOR_PAIR(i + 1));
716 align_str(top.win, tmp, d.len * COLS / 100, d.align);
721 static int update_item(int item_num, char *buf)
723 char **c = stat_content + item_num;
730 *c = para_strdup("(artist tag not set)");
733 *c = para_strdup("(title tag not set)");
736 *c = para_strdup("????");
739 *c = para_strdup("(album tag not set)");
742 *c = para_strdup("(comment tag not set)");
746 *c = para_strdup(buf);
748 print_stat_item(item_num);
752 static int read_stat_pipe(fd_set *rfds)
755 static int bufsize, loaded;
761 if (loaded >= bufsize) {
762 if (bufsize > 1000 * 1000) {
766 bufsize += bufsize + 1000;
767 buf = para_realloc(buf, bufsize);
769 assert(loaded < bufsize);
770 ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
773 ret2 = for_each_stat_item(buf, loaded, update_item);
774 if (ret < 0 || ret2 < 0) {
776 return ret2 < 0? ret2 : ret;
778 sz = ret2; /* what is left */
779 if (sz > 0 && sz < loaded)
780 memmove(buf, buf + loaded - sz, sz);
785 static void print_all_items(void)
791 FOR_EACH_STATUS_ITEM(i)
795 static void clear_all_items(void)
799 FOR_EACH_STATUS_ITEM(i) {
800 free(stat_content[i]);
801 stat_content[i] = para_strdup("");
805 static void init_pair_or_die(short pair, short f, short b)
807 if (init_pair(pair, f, b) == ERR)
808 msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
811 static void init_colors_or_die(void)
816 msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
817 if (start_color() == ERR)
818 msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
819 FOR_EACH_STATUS_ITEM(i)
820 if (theme.data[i].len)
821 init_pair_or_die(i + 1, theme.data[i].fg,
823 init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
824 init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
825 init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
826 init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
827 init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
828 init_pair_or_die(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
829 init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
830 init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
831 init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
834 /* (Re-)initialize the curses library. */
835 static void init_curses(void)
838 if (top.win && refresh() == ERR) /* refesh is really needed */
839 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
840 if (LINES < theme.lines_min || COLS < theme.cols_min)
841 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
842 " (need at least %dx%d)\n", COLS, LINES,
843 theme.cols_min, theme.lines_min);
844 curs_set(0); /* make cursor invisible, ignore errors */
845 nonl(); /* do not NL->CR/NL on output, always returns OK */
846 /* don't echo input */
848 msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
849 /* take input chars one at a time, no wait for \n */
851 msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
852 init_colors_or_die();
853 clear(); /* ignore non-fatal errors */
854 init_wins(theme.top_lines_default);
856 // noecho(); /* don't echo input */
859 static void check_sigchld(void)
864 ret = para_reap_child(&pid);
869 goto reap_next_child;
873 * This sucker modifies its first argument. *handler and *arg are
874 * pointers to 0-terminated strings (inside line). Crap.
876 static int split_key_map(char *line, char **handler, char **arg)
878 if (!(*handler = strchr(line + 1, ':')))
882 if (!(*arg = strchr(*handler, ':')))
891 static int check_key_map_args(void)
895 char *tmp = NULL, *handler, *arg;
897 for (i = 0; i < conf.key_map_given; ++i) {
898 s = conf.key_map_arg[i];
902 tmp = para_strdup(s);
903 if (!split_key_map(tmp, &handler, &arg))
905 if (strlen(handler) != 1)
914 if (find_cmd_byname(arg) < 0)
924 * React to various signal-related events
926 static void handle_signal(int sig)
930 msg_n_exit(EXIT_FAILURE,
931 "only the good die young (caught SIGTERM))\n");
941 PARA_WARNING_LOG("caught SIGINT, reset");
942 /* Nothing to do. SIGINT killed our child which gets noticed
943 * by do_select and resets everything.
947 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration");
956 static void status_pre_select(fd_set *rfds, int *max_fileno, struct timeval *tv)
958 static struct timeval next_exec, atm, diff;
959 int ret, fds[3] = {0, 1, 0};
964 /* Avoid busy loop */
965 gettimeofday(&atm, NULL);
966 if (tv_diff(&next_exec, &atm, &diff) > 0) {
967 if (tv_diff(&diff, tv, NULL) < 0)
971 next_exec.tv_sec = atm.tv_sec + 2;
972 ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
975 ret = mark_fd_nonblocking(fds[1]);
982 para_fd_set(stat_pipe, rfds, max_fileno);
985 #define COMMAND_BUF_SIZE 32768
988 * This is the core select loop. Besides the (internal) signal
989 * pipe, the following other fds are checked according to the mode:
991 * GETCH_MODE: check stdin, return when key is pressed
993 * COMMAND_MODE: check command fds and stdin. Return when peer has closed both
994 * stdout and stderr or when any key is pressed.
996 * EXTERNAL_MODE: Check only signal pipe. Used when an external command
997 * is running. During that time curses is disabled. Returns when
1000 static int do_select(int mode)
1003 int ret, i, max_fileno;
1004 char command_buf[2][COMMAND_BUF_SIZE] = {"", ""};
1005 int cbo[2] = {0, 0}; /* command buf offsets */
1007 unsigned flags[2] = {0, 0}; /* for for_each_line() */
1010 tv.tv_sec = conf.timeout_arg / 1000;
1011 tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
1012 // ret = refresh_status();
1015 status_pre_select(&rfds, &max_fileno, &tv);
1017 para_fd_set(signal_pipe, &rfds, &max_fileno);
1018 /* command pipe only for COMMAND_MODE */
1019 if (mode == COMMAND_MODE) {
1020 if (command_fds[0] >= 0)
1021 para_fd_set(command_fds[0], &rfds, &max_fileno);
1022 if (command_fds[1] >= 0)
1023 para_fd_set(command_fds[1], &rfds, &max_fileno);
1025 if (mode == GETCH_MODE || mode == COMMAND_MODE)
1026 para_fd_set(STDIN_FILENO, &rfds, &max_fileno);
1027 ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
1029 goto check_return; /* skip fd checks */
1031 ret = para_next_signal(&rfds);
1034 /* read command pipe if ready */
1035 if (mode == COMMAND_MODE) {
1036 for (i = 0; i < 2; i++) {
1038 if (command_fds[i] < 0)
1040 ret = read_nonblock(command_fds[i],
1041 command_buf[i] + cbo[i],
1042 COMMAND_BUF_SIZE - 1 - cbo[i], &rfds, &sz);
1045 cbo[i] = for_each_line(flags[i], command_buf[i], cbo[i],
1046 add_output_line, &i);
1047 if (sz != cbo[i]) { /* at least one line found */
1052 PARA_NOTICE_LOG("closing command fd %d: %s",
1053 i, para_strerror(-ret));
1054 close(command_fds[i]);
1055 command_fds[i] = -1;
1057 if (command_fds[!i] < 0) /* both fds closed */
1060 if (cbo[i] == COMMAND_BUF_SIZE - 1) {
1061 PARA_NOTICE_LOG("discarding overlong line");
1063 flags[i] = FELF_DISCARD_FIRST;
1067 ret = read_stat_pipe(&rfds);
1069 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1073 free(stat_content[SI_BASENAME]);
1074 stat_content[SI_BASENAME] =
1075 para_strdup("stat command terminated!?");
1081 ret = wgetch(top.win);
1082 if (ret != ERR && ret != KEY_RESIZE) {
1083 if (command_fds[0] >= 0) {
1084 close(command_fds[0]);
1085 command_fds[0] = -1;
1087 if (command_fds[1] >= 0) {
1088 close(command_fds[1]);
1089 command_fds[1] = -1;
1092 kill(cmd_pid, SIGTERM);
1097 ret = wgetch(top.win);
1098 if (ret != ERR && ret != KEY_RESIZE)
1109 * read from command pipe and print data to bot window
1111 static void send_output(void)
1115 ret = mark_fd_nonblocking(command_fds[0]);
1118 ret = mark_fd_nonblocking(command_fds[1]);
1121 if (do_select(COMMAND_MODE) >= 0)
1122 PARA_INFO_LOG("command complete");
1124 PARA_NOTICE_LOG("command aborted");
1125 print_in_bar(COLOR_MSG, " ");
1128 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1129 close(command_fds[0]);
1130 close(command_fds[1]);
1133 static void para_cmd(char *cmd)
1135 int ret, fds[3] = {0, 1, 1};
1136 char *c = make_message(BINDIR "/para_client -- %s", cmd);
1138 outputf(COLOR_COMMAND, "%s", c);
1139 print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1140 ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
1144 command_fds[0] = fds[1];
1145 command_fds[1] = fds[2];
1150 * exec command and print output to bot win
1152 static void display_cmd(char *cmd)
1154 int fds[3] = {0, 1, 1};
1156 print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1157 outputf(COLOR_COMMAND, "%s", cmd);
1158 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1160 command_fds[0] = fds[1];
1161 command_fds[1] = fds[2];
1166 * shutdown curses and stat pipe before executing external commands
1168 static void external_cmd(char *cmd)
1170 int fds[3] = {-1, -1, -1};
1175 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1177 do_select(EXTERNAL_MODE);
1181 static void print_scroll_msg(void)
1183 unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1184 int first_rbe = first_visible_rbe(&lines_total);
1185 print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1186 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1189 static void com_scroll_top(void)
1191 int i = RINGBUFFER_SIZE - 1;
1194 while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1196 /* i is oldest entry */
1197 for (; lines < bot.lines && i >= 0; i--) {
1198 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1201 lines += NUM_LINES(rbe->len);
1204 if (lines > 0 && scroll_position != i) {
1205 scroll_position = i;
1210 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1213 static void com_cancel_scrolling(void)
1216 if (scroll_position == 0) {
1217 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1220 scroll_position = 0;
1224 static void com_page_down(void)
1227 int i = scroll_position;
1228 while (lines < bot.lines && --i > 0) {
1229 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1232 lines += NUM_LINES(rbe->len);
1235 scroll_position = i;
1240 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1243 static void com_page_up(void)
1246 int fvr = first_visible_rbe(&lines);
1248 if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1249 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1252 scroll_position = fvr + 1;
1253 for (; scroll_position > 0; scroll_position--) {
1254 first_visible_rbe(&lines);
1255 if (lines == bot.lines)
1262 static void com_scroll_down(void)
1264 struct rb_entry *rbe;
1267 if (!scroll_position) {
1268 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1272 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1273 rbe_lines = NUM_LINES(rbe->len);
1274 wscrl(bot.win, rbe_lines);
1275 wmove(bot.win, bot.lines - rbe_lines, 0);
1276 wattron(bot.win, COLOR_PAIR(rbe->color));
1277 waddstr(bot.win, rbe->msg);
1282 static void com_scroll_up(void)
1284 struct rb_entry *rbe = NULL;
1286 int i, first_rbe, num_scroll;
1288 /* the entry that is going to vanish */
1289 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1292 num_scroll = NUM_LINES(rbe->len);
1293 first_rbe = first_visible_rbe(&lines);
1294 if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1297 wscrl(bot.win, -num_scroll);
1298 i = draw_top_rbe(&lines);
1301 while (i > 0 && lines < num_scroll) {
1303 rbe = ringbuffer_get(bot_win_rb, --i);
1306 rbe_lines = NUM_LINES(rbe->len);
1308 // fprintf(stderr, "msg: %s\n", rbe->msg);
1309 wattron(bot.win, COLOR_PAIR(rbe->color));
1310 waddstr(bot.win, "\n");
1311 waddstr(bot.win, rbe->msg);
1320 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1323 static void com_ll_decr(void)
1325 if (loglevel <= LL_DEBUG) {
1326 print_in_bar(COLOR_ERRMSG,
1327 "loglevel already at maximal verbosity\n");
1331 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1334 static void com_ll_incr(void)
1336 if (loglevel >= LL_EMERG) {
1337 print_in_bar(COLOR_ERRMSG,
1338 "loglevel already at minimal verbosity\n");
1342 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1346 * reread configuration, terminate on errors
1348 static void com_reread_conf(void)
1350 char *cf =configfile_exists();
1351 struct gui_cmdline_parser_params params = {
1354 .check_required = 0,
1355 .check_ambiguity = 0,
1360 PARA_WARNING_LOG("there is no configuration to read");
1363 PARA_INFO_LOG("rereading command line options and config file");
1364 gui_cmdline_parser_ext(_argc, _argv, &conf, ¶ms);
1365 gui_cmdline_parser_config_file(cf, &conf, ¶ms);
1366 PARA_NOTICE_LOG("config file reloaded");
1367 if (check_key_map_args() < 0)
1368 finish(EXIT_FAILURE);
1371 static void com_help(void)
1375 for (i = 0; i < conf.key_map_given; ++i) {
1376 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1377 const char *handler_text = "???", *desc = NULL;
1379 if (!split_key_map(tmp, &handler, &arg)) {
1385 handler_text = "internal";
1386 desc = command_list[find_cmd_byname(arg)].description;
1388 case 'x': handler_text = "external"; break;
1389 case 'd': handler_text = "display "; break;
1390 case 'p': handler_text = "para "; break;
1392 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1393 strlen(arg) < 8? "\t" : "",
1397 for (i = 0; command_list[i].handler; i++) {
1398 struct gui_command gc = command_list[i];
1400 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1401 strlen(gc.name) < 8? "\t" : "",
1404 print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1408 static void com_shrink_top_win(void)
1410 if (top.lines <= theme.top_lines_min) {
1411 PARA_WARNING_LOG("can not decrease top window");
1414 init_wins(top.lines - 1);
1417 print_in_bar(COLOR_MSG, "%s", "decreased top window");
1420 static void com_enlarge_top_win(void)
1422 if (bot.lines < 3) {
1423 PARA_WARNING_LOG("can not increase top window");
1426 init_wins(top.lines + 1);
1429 print_in_bar(COLOR_MSG, "increased top window");
1432 static void com_version(void)
1434 print_in_bar(COLOR_MSG, "%s", version_single_line("gui"));
1437 __noreturn static void com_quit(void)
1442 static void com_refresh(void)
1448 static void change_theme(int next)
1454 /* This seems to be needed twice, why? */
1457 PARA_NOTICE_LOG("new theme: %s", theme.name);
1460 static void com_next_theme(void)
1465 static void com_prev_theme(void)
1471 static void handle_command(int c)
1475 /* first check user's key bindings */
1476 for (i = 0; i < conf.key_map_given; ++i) {
1477 char *tmp, *handler, *arg;
1479 tmp = para_strdup(conf.key_map_arg[i]);
1480 if (!split_key_map(tmp, &handler, &arg)) {
1484 if (strcmp(tmp, km_keyname(c))) {
1488 if (*handler == 'd')
1490 else if (*handler == 'x')
1492 else if (*handler == 'p')
1494 else if (*handler == 'i') {
1495 int num = find_cmd_byname(arg);
1497 command_list[num].handler();
1502 /* not found, check internal key bindings */
1503 for (i = 0; command_list[i].handler; i++) {
1504 if (!strcmp(km_keyname(c), command_list[i].key)) {
1505 command_list[i].handler();
1509 print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1513 __noreturn static void print_help_and_die(void)
1515 struct ggo_help h = DEFINE_GGO_HELP(gui);
1516 bool d = conf.detailed_help_given;
1518 ggo_print_help(&h, d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS);
1522 int main(int argc, char *argv[])
1530 gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
1531 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1532 version_handle_flag("gui", conf.version_given);
1533 if (conf.help_given || conf.detailed_help_given)
1534 print_help_and_die();
1535 cf = configfile_exists();
1536 if (!cf && conf.config_file_given) {
1537 fprintf(stderr, "can not read config file %s\n",
1538 conf.config_file_arg);
1542 struct gui_cmdline_parser_params params = {
1545 .check_required = 0,
1546 .check_ambiguity = 0,
1549 gui_cmdline_parser_config_file(cf, &conf, ¶ms);
1550 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1552 if (check_key_map_args() < 0) {
1553 fprintf(stderr, "invalid key map\n");
1556 init_theme_or_die(conf.theme_arg, &theme);
1557 top.lines = theme.top_lines_default;
1558 setup_signal_handling();
1559 bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1560 setlocale(LC_CTYPE, "");
1561 initscr(); /* needed only once, always successful */
1566 ret = do_select(GETCH_MODE);
1569 print_in_bar(COLOR_MSG, " ");
1570 handle_command(ret);