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 static __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);
563 para_sigaction(SIGHUP, SIG_IGN);
566 /* kill every process in the process group and exit */
567 __noreturn static void kill_pg_and_die(int ret)
569 para_sigaction(SIGTERM, SIG_IGN);
574 static void shutdown_curses(void)
583 __noreturn static void finish(int ret)
586 kill_pg_and_die(ret);
590 * exit curses and print given message to stdout/stderr
592 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
595 FILE *outfd = ret? stderr: stdout;
599 vfprintf(outfd, fmt, argp);
601 kill_pg_and_die(ret);
604 static void print_welcome(void)
606 if (loglevel > LL_NOTICE)
608 outputf(COLOR_WELCOME, "Welcome to %s. Theme: %s",
609 version_single_line("gui"), theme.name);
616 static void init_wins(int top_lines)
620 top.lines = top_lines;
625 bot.lines = LINES - top.lines - 3;
627 bot.begy = top.lines + 1;
642 sep.begy = top.lines;
645 assume_default_colors(theme.default_fg, theme.default_bg);
647 mvwin(top.win, top.begy, top.begx);
648 wresize(top.win, top.lines, top.cols);
650 mvwin(sb.win, sb.begy, sb.begx);
651 wresize(sb.win, sb.lines, sb.cols);
653 mvwin(sep.win, sep.begy, sep.begx);
654 wresize(sep.win, sep.lines, sep.cols);
656 mvwin(bot.win, bot.begy, bot.begx);
657 wresize(bot.win, bot.lines, bot.cols);
659 mvwin(in.win, in.begy, in.begx);
660 wresize(in.win, in.lines, in.cols);
662 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
663 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
664 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
665 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
666 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
667 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
668 msg_n_exit(1, "Error: Cannot create curses windows\n");
672 scrollok(bot.win, 1);
673 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
674 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
675 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
676 wattron(top.win, COLOR_PAIR(COLOR_TOP));
688 wmove(sep.win, 0, 0);
689 for (i = 1; i <= COLS; i++)
690 waddstr(sep.win, theme.sep_str);
693 wnoutrefresh(top.win);
694 wnoutrefresh(bot.win);
695 //wnoutrefresh(sb.win);
697 wnoutrefresh(in.win);
698 wnoutrefresh(sep.win);
703 * Print stat item #i to curses window
705 static void print_stat_item(int i)
708 struct stat_item_data d = theme.data[i];
709 char *c = stat_content[i];
711 if (!curses_active || !d.len || !c)
713 tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
714 wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
716 wattron(top.win, COLOR_PAIR(i + 1));
717 align_str(top.win, tmp, d.len * COLS / 100, d.align);
722 static int update_item(int item_num, char *buf)
724 char **c = stat_content + item_num;
731 *c = para_strdup("(artist tag not set)");
734 *c = para_strdup("(title tag not set)");
737 *c = para_strdup("????");
740 *c = para_strdup("(album tag not set)");
743 *c = para_strdup("(comment tag not set)");
747 *c = para_strdup(buf);
749 print_stat_item(item_num);
753 static int read_stat_pipe(fd_set *rfds)
756 static int bufsize, loaded;
762 if (loaded >= bufsize) {
763 if (bufsize > 1000 * 1000) {
767 bufsize += bufsize + 1000;
768 buf = para_realloc(buf, bufsize);
770 assert(loaded < bufsize);
771 ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
774 ret2 = for_each_stat_item(buf, loaded, update_item);
775 if (ret < 0 || ret2 < 0) {
777 return ret2 < 0? ret2 : ret;
779 sz = ret2; /* what is left */
780 if (sz > 0 && sz < loaded)
781 memmove(buf, buf + loaded - sz, sz);
786 static void print_all_items(void)
792 FOR_EACH_STATUS_ITEM(i)
796 static void clear_all_items(void)
800 FOR_EACH_STATUS_ITEM(i) {
801 free(stat_content[i]);
802 stat_content[i] = para_strdup("");
806 static void init_pair_or_die(short pair, short f, short b)
808 if (init_pair(pair, f, b) == ERR)
809 msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
812 static void init_colors_or_die(void)
817 msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
818 if (start_color() == ERR)
819 msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
820 FOR_EACH_STATUS_ITEM(i)
821 if (theme.data[i].len)
822 init_pair_or_die(i + 1, theme.data[i].fg,
824 init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
825 init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
826 init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
827 init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
828 init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
829 init_pair_or_die(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
830 init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
831 init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
832 init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
835 /* (Re-)initialize the curses library. */
836 static void init_curses(void)
839 if (top.win && refresh() == ERR) /* refesh is really needed */
840 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
841 if (LINES < theme.lines_min || COLS < theme.cols_min)
842 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
843 " (need at least %dx%d)\n", COLS, LINES,
844 theme.cols_min, theme.lines_min);
845 curs_set(0); /* make cursor invisible, ignore errors */
846 nonl(); /* do not NL->CR/NL on output, always returns OK */
847 /* don't echo input */
849 msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
850 /* take input chars one at a time, no wait for \n */
852 msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
853 init_colors_or_die();
854 clear(); /* ignore non-fatal errors */
855 init_wins(theme.top_lines_default);
857 // noecho(); /* don't echo input */
860 static void check_sigchld(void)
865 ret = para_reap_child(&pid);
870 goto reap_next_child;
874 * This sucker modifies its first argument. *handler and *arg are
875 * pointers to 0-terminated strings (inside line). Crap.
877 static int split_key_map(char *line, char **handler, char **arg)
879 if (!(*handler = strchr(line + 1, ':')))
883 if (!(*arg = strchr(*handler, ':')))
892 static int check_key_map_args(void)
896 char *tmp = NULL, *handler, *arg;
898 for (i = 0; i < conf.key_map_given; ++i) {
899 s = conf.key_map_arg[i];
903 tmp = para_strdup(s);
904 if (!split_key_map(tmp, &handler, &arg))
906 if (strlen(handler) != 1)
915 if (find_cmd_byname(arg) < 0)
925 * React to various signal-related events
927 static void handle_signal(int sig)
931 msg_n_exit(EXIT_FAILURE,
932 "only the good die young (caught SIGTERM))\n");
942 PARA_WARNING_LOG("caught SIGINT, reset");
943 /* Nothing to do. SIGINT killed our child which gets noticed
944 * by do_select and resets everything.
948 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration");
957 static void status_pre_select(fd_set *rfds, int *max_fileno, struct timeval *tv)
959 static struct timeval next_exec, atm, diff;
960 int ret, fds[3] = {0, 1, 0};
965 /* Avoid busy loop */
966 gettimeofday(&atm, NULL);
967 if (tv_diff(&next_exec, &atm, &diff) > 0) {
968 if (tv_diff(&diff, tv, NULL) < 0)
972 next_exec.tv_sec = atm.tv_sec + 2;
973 ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
976 ret = mark_fd_nonblocking(fds[1]);
983 para_fd_set(stat_pipe, rfds, max_fileno);
986 #define COMMAND_BUF_SIZE 32768
989 * This is the core select loop. Besides the (internal) signal
990 * pipe, the following other fds are checked according to the mode:
992 * GETCH_MODE: check stdin, return when key is pressed
994 * COMMAND_MODE: check command fds and stdin. Return when peer has closed both
995 * stdout and stderr or when any key is pressed.
997 * EXTERNAL_MODE: Check only signal pipe. Used when an external command
998 * is running. During that time curses is disabled. Returns when
1001 static int do_select(int mode)
1004 int ret, i, max_fileno;
1005 char command_buf[2][COMMAND_BUF_SIZE] = {"", ""};
1006 int cbo[2] = {0, 0}; /* command buf offsets */
1008 unsigned flags[2] = {0, 0}; /* for for_each_line() */
1011 tv.tv_sec = conf.timeout_arg / 1000;
1012 tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
1013 // ret = refresh_status();
1016 status_pre_select(&rfds, &max_fileno, &tv);
1018 para_fd_set(signal_pipe, &rfds, &max_fileno);
1019 /* command pipe only for COMMAND_MODE */
1020 if (mode == COMMAND_MODE) {
1021 if (command_fds[0] >= 0)
1022 para_fd_set(command_fds[0], &rfds, &max_fileno);
1023 if (command_fds[1] >= 0)
1024 para_fd_set(command_fds[1], &rfds, &max_fileno);
1026 if (mode == GETCH_MODE || mode == COMMAND_MODE)
1027 para_fd_set(STDIN_FILENO, &rfds, &max_fileno);
1028 ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
1030 goto check_return; /* skip fd checks */
1032 ret = para_next_signal(&rfds);
1035 /* read command pipe if ready */
1036 if (mode == COMMAND_MODE) {
1037 for (i = 0; i < 2; i++) {
1039 if (command_fds[i] < 0)
1041 ret = read_nonblock(command_fds[i],
1042 command_buf[i] + cbo[i],
1043 COMMAND_BUF_SIZE - 1 - cbo[i], &rfds, &sz);
1046 cbo[i] = for_each_line(flags[i], command_buf[i], cbo[i],
1047 add_output_line, &i);
1048 if (sz != cbo[i]) { /* at least one line found */
1053 PARA_NOTICE_LOG("closing command fd %d: %s",
1054 i, para_strerror(-ret));
1055 close(command_fds[i]);
1056 command_fds[i] = -1;
1058 if (command_fds[!i] < 0) /* both fds closed */
1061 if (cbo[i] == COMMAND_BUF_SIZE - 1) {
1062 PARA_NOTICE_LOG("discarding overlong line");
1064 flags[i] = FELF_DISCARD_FIRST;
1068 ret = read_stat_pipe(&rfds);
1070 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1074 free(stat_content[SI_BASENAME]);
1075 stat_content[SI_BASENAME] =
1076 para_strdup("stat command terminated!?");
1082 ret = wgetch(top.win);
1083 if (ret != ERR && ret != KEY_RESIZE) {
1084 if (command_fds[0] >= 0) {
1085 close(command_fds[0]);
1086 command_fds[0] = -1;
1088 if (command_fds[1] >= 0) {
1089 close(command_fds[1]);
1090 command_fds[1] = -1;
1093 kill(cmd_pid, SIGTERM);
1098 ret = wgetch(top.win);
1099 if (ret != ERR && ret != KEY_RESIZE)
1110 * read from command pipe and print data to bot window
1112 static void send_output(void)
1116 ret = mark_fd_nonblocking(command_fds[0]);
1119 ret = mark_fd_nonblocking(command_fds[1]);
1122 if (do_select(COMMAND_MODE) >= 0)
1123 PARA_INFO_LOG("command complete");
1125 PARA_NOTICE_LOG("command aborted");
1126 print_in_bar(COLOR_MSG, " ");
1129 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1130 close(command_fds[0]);
1131 close(command_fds[1]);
1134 static void para_cmd(char *cmd)
1136 int ret, fds[3] = {0, 1, 1};
1137 char *c = make_message(BINDIR "/para_client -- %s", cmd);
1139 outputf(COLOR_COMMAND, "%s", c);
1140 print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1141 ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
1145 command_fds[0] = fds[1];
1146 command_fds[1] = fds[2];
1151 * exec command and print output to bot win
1153 static void display_cmd(char *cmd)
1155 int fds[3] = {0, 1, 1};
1157 print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1158 outputf(COLOR_COMMAND, "%s", cmd);
1159 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1161 command_fds[0] = fds[1];
1162 command_fds[1] = fds[2];
1167 * shutdown curses and stat pipe before executing external commands
1169 static void external_cmd(char *cmd)
1171 int fds[3] = {-1, -1, -1};
1176 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1178 do_select(EXTERNAL_MODE);
1182 static void print_scroll_msg(void)
1184 unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1185 int first_rbe = first_visible_rbe(&lines_total);
1186 print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1187 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1190 static void com_scroll_top(void)
1192 int i = RINGBUFFER_SIZE - 1;
1195 while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1197 /* i is oldest entry */
1198 for (; lines < bot.lines && i >= 0; i--) {
1199 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1202 lines += NUM_LINES(rbe->len);
1205 if (lines > 0 && scroll_position != i) {
1206 scroll_position = i;
1211 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1214 static void com_cancel_scrolling(void)
1217 if (scroll_position == 0) {
1218 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1221 scroll_position = 0;
1225 static void com_page_down(void)
1228 int i = scroll_position;
1229 while (lines < bot.lines && --i > 0) {
1230 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1233 lines += NUM_LINES(rbe->len);
1236 scroll_position = i;
1241 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1244 static void com_page_up(void)
1247 int fvr = first_visible_rbe(&lines);
1249 if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1250 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1253 scroll_position = fvr + 1;
1254 for (; scroll_position > 0; scroll_position--) {
1255 first_visible_rbe(&lines);
1256 if (lines == bot.lines)
1263 static void com_scroll_down(void)
1265 struct rb_entry *rbe;
1268 if (!scroll_position) {
1269 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1273 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1274 rbe_lines = NUM_LINES(rbe->len);
1275 wscrl(bot.win, rbe_lines);
1276 wmove(bot.win, bot.lines - rbe_lines, 0);
1277 wattron(bot.win, COLOR_PAIR(rbe->color));
1278 waddstr(bot.win, rbe->msg);
1283 static void com_scroll_up(void)
1285 struct rb_entry *rbe = NULL;
1287 int i, first_rbe, num_scroll;
1289 /* the entry that is going to vanish */
1290 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1293 num_scroll = NUM_LINES(rbe->len);
1294 first_rbe = first_visible_rbe(&lines);
1295 if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1298 wscrl(bot.win, -num_scroll);
1299 i = draw_top_rbe(&lines);
1302 while (i > 0 && lines < num_scroll) {
1304 rbe = ringbuffer_get(bot_win_rb, --i);
1307 rbe_lines = NUM_LINES(rbe->len);
1309 // fprintf(stderr, "msg: %s\n", rbe->msg);
1310 wattron(bot.win, COLOR_PAIR(rbe->color));
1311 waddstr(bot.win, "\n");
1312 waddstr(bot.win, rbe->msg);
1321 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1324 static void com_ll_decr(void)
1326 if (loglevel <= LL_DEBUG) {
1327 print_in_bar(COLOR_ERRMSG,
1328 "loglevel already at maximal verbosity\n");
1332 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1335 static void com_ll_incr(void)
1337 if (loglevel >= LL_EMERG) {
1338 print_in_bar(COLOR_ERRMSG,
1339 "loglevel already at minimal verbosity\n");
1343 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1347 * reread configuration, terminate on errors
1349 static void com_reread_conf(void)
1351 char *cf =configfile_exists();
1352 struct gui_cmdline_parser_params params = {
1355 .check_required = 0,
1356 .check_ambiguity = 0,
1361 PARA_WARNING_LOG("there is no configuration to read");
1364 PARA_INFO_LOG("rereading command line options and config file");
1365 gui_cmdline_parser_ext(_argc, _argv, &conf, ¶ms);
1366 gui_cmdline_parser_config_file(cf, &conf, ¶ms);
1367 PARA_NOTICE_LOG("config file reloaded");
1368 if (check_key_map_args() < 0)
1369 finish(EXIT_FAILURE);
1372 static void com_help(void)
1376 for (i = 0; i < conf.key_map_given; ++i) {
1377 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1378 const char *handler_text = "???", *desc = NULL;
1380 if (!split_key_map(tmp, &handler, &arg)) {
1386 handler_text = "internal";
1387 desc = command_list[find_cmd_byname(arg)].description;
1389 case 'x': handler_text = "external"; break;
1390 case 'd': handler_text = "display "; break;
1391 case 'p': handler_text = "para "; break;
1393 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1394 strlen(arg) < 8? "\t" : "",
1398 for (i = 0; command_list[i].handler; i++) {
1399 struct gui_command gc = command_list[i];
1401 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1402 strlen(gc.name) < 8? "\t" : "",
1405 print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1409 static void com_shrink_top_win(void)
1411 if (top.lines <= theme.top_lines_min) {
1412 PARA_WARNING_LOG("can not decrease top window");
1415 init_wins(top.lines - 1);
1418 print_in_bar(COLOR_MSG, "%s", "decreased top window");
1421 static void com_enlarge_top_win(void)
1423 if (bot.lines < 3) {
1424 PARA_WARNING_LOG("can not increase top window");
1427 init_wins(top.lines + 1);
1430 print_in_bar(COLOR_MSG, "increased top window");
1433 static void com_version(void)
1435 print_in_bar(COLOR_MSG, "%s", version_single_line("gui"));
1438 __noreturn static void com_quit(void)
1443 static void com_refresh(void)
1449 static void change_theme(int next)
1455 /* This seems to be needed twice, why? */
1458 PARA_NOTICE_LOG("new theme: %s", theme.name);
1461 static void com_next_theme(void)
1466 static void com_prev_theme(void)
1472 static void handle_command(int c)
1476 /* first check user's key bindings */
1477 for (i = 0; i < conf.key_map_given; ++i) {
1478 char *tmp, *handler, *arg;
1480 tmp = para_strdup(conf.key_map_arg[i]);
1481 if (!split_key_map(tmp, &handler, &arg)) {
1485 if (strcmp(tmp, km_keyname(c))) {
1489 if (*handler == 'd')
1491 else if (*handler == 'x')
1493 else if (*handler == 'p')
1495 else if (*handler == 'i') {
1496 int num = find_cmd_byname(arg);
1498 command_list[num].handler();
1503 /* not found, check internal key bindings */
1504 for (i = 0; command_list[i].handler; i++) {
1505 if (!strcmp(km_keyname(c), command_list[i].key)) {
1506 command_list[i].handler();
1510 print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1514 __noreturn static void print_help_and_die(void)
1516 struct ggo_help h = DEFINE_GGO_HELP(gui);
1517 bool d = conf.detailed_help_given;
1519 ggo_print_help(&h, d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS);
1523 int main(int argc, char *argv[])
1531 gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
1532 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1533 version_handle_flag("gui", conf.version_given);
1534 if (conf.help_given || conf.detailed_help_given)
1535 print_help_and_die();
1536 cf = configfile_exists();
1537 if (!cf && conf.config_file_given) {
1538 fprintf(stderr, "can not read config file %s\n",
1539 conf.config_file_arg);
1543 struct gui_cmdline_parser_params params = {
1546 .check_required = 0,
1547 .check_ambiguity = 0,
1550 gui_cmdline_parser_config_file(cf, &conf, ¶ms);
1551 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1553 if (check_key_map_args() < 0) {
1554 fprintf(stderr, "invalid key map\n");
1557 init_theme_or_die(conf.theme_arg, &theme);
1558 top.lines = theme.top_lines_default;
1559 setup_signal_handling();
1560 bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1561 setlocale(LC_CTYPE, "");
1562 initscr(); /* needed only once, always successful */
1567 ret = do_select(GETCH_MODE);
1570 print_in_bar(COLOR_MSG, " ");
1571 handle_command(ret);