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>
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 curses_active;
56 static int command_fds[2];
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, void *data)
490 int color = *(int *)data? COLOR_ERRMSG : COLOR_OUTPUT;
493 rb_add_entry(color, para_strdup(line));
499 __printf_2_3 void curses_log(int ll, const char *fmt,...)
505 if (ll < loglevel || !curses_active)
514 color = COLOR_ERRMSG;
517 xvasprintf(&msg, fmt, ap);
520 rb_add_entry(color, msg);
523 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
525 static void setup_signal_handling(void)
527 signal_pipe = para_signal_init();
528 para_install_sighandler(SIGINT);
529 para_install_sighandler(SIGTERM);
530 para_install_sighandler(SIGCHLD);
531 para_install_sighandler(SIGWINCH);
532 para_install_sighandler(SIGUSR1);
533 para_sigaction(SIGHUP, SIG_IGN);
536 __noreturn static void do_exit(int ret)
538 para_sigaction(SIGTERM, SIG_IGN);
543 static void shutdown_curses(void)
552 __noreturn static void finish(int ret)
559 * exit curses and print given message to stdout/stderr
561 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
564 FILE *outfd = ret? stderr: stdout;
568 vfprintf(outfd, fmt, argp);
573 static void print_welcome(void)
575 if (loglevel > LL_NOTICE)
577 outputf(COLOR_WELCOME, "Welcome to para_gui " PACKAGE_VERSION
578 " \"" CODENAME "\". Theme: %s", theme.name);
585 static void init_wins(int top_lines)
589 top.lines = top_lines;
594 bot.lines = LINES - top.lines - 3;
596 bot.begy = top.lines + 1;
611 sep.begy = top.lines;
614 assume_default_colors(theme.default_fg, theme.default_bg);
616 mvwin(top.win, top.begy, top.begx);
617 wresize(top.win, top.lines, top.cols);
619 mvwin(sb.win, sb.begy, sb.begx);
620 wresize(sb.win, sb.lines, sb.cols);
622 mvwin(sep.win, sep.begy, sep.begx);
623 wresize(sep.win, sep.lines, sep.cols);
625 mvwin(bot.win, bot.begy, bot.begx);
626 wresize(bot.win, bot.lines, bot.cols);
628 mvwin(in.win, in.begy, in.begx);
629 wresize(in.win, in.lines, in.cols);
631 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
632 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
633 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
634 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
635 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
636 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
637 msg_n_exit(1, "Error: Cannot create curses windows\n");
641 scrollok(bot.win, 1);
642 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
643 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
644 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
645 wattron(top.win, COLOR_PAIR(COLOR_TOP));
657 wmove(sep.win, 0, 0);
658 for (i = 1; i <= COLS; i++)
659 waddstr(sep.win, theme.sep_str);
662 wnoutrefresh(top.win);
663 wnoutrefresh(bot.win);
664 //wnoutrefresh(sb.win);
666 wnoutrefresh(in.win);
667 wnoutrefresh(sep.win);
672 * Print stat item #i to curses window
674 static void print_stat_item(int i)
677 struct stat_item_data d = theme.data[i];
678 char *c = stat_content[i];
680 if (!curses_active || !d.len || !c)
682 tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
683 wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
685 wattron(top.win, COLOR_PAIR(i + 1));
686 align_str(top.win, tmp, d.len * COLS / 100, d.align);
691 static int update_item(int item_num, char *buf)
693 char **c = stat_content + item_num;
700 *c = para_strdup("(artist tag not set)");
703 *c = para_strdup("(title tag not set)");
706 *c = para_strdup("????");
709 *c = para_strdup("(album tag not set)");
712 *c = para_strdup("(comment tag not set)");
716 *c = para_strdup(buf);
718 print_stat_item(item_num);
722 static int read_stat_pipe(fd_set *rfds)
725 static int bufsize, loaded;
731 if (loaded >= bufsize) {
732 if (bufsize > 1000 * 1000) {
736 bufsize += bufsize + 1000;
737 buf = para_realloc(buf, bufsize);
739 assert(loaded < bufsize);
740 ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
743 ret2 = for_each_stat_item(buf, loaded, update_item);
744 if (ret < 0 || ret2 < 0) {
746 return ret2 < 0? ret2 : ret;
748 sz = ret2; /* what is left */
749 if (sz > 0 && sz < loaded)
750 memmove(buf, buf + loaded - sz, sz);
755 static void print_all_items(void)
761 FOR_EACH_STATUS_ITEM(i)
765 static void clear_all_items(void)
769 FOR_EACH_STATUS_ITEM(i) {
770 free(stat_content[i]);
771 stat_content[i] = para_strdup("");
775 static void init_pair_or_die(short pair, short f, short b)
777 if (init_pair(pair, f, b) == ERR)
778 msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
781 static void init_colors_or_die(void)
786 msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
787 if (start_color() == ERR)
788 msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
789 FOR_EACH_STATUS_ITEM(i)
790 if (theme.data[i].len)
791 init_pair_or_die(i + 1, theme.data[i].fg,
793 init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
794 init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
795 init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
796 init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
797 init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
798 init_pair_or_die(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
799 init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
800 init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
801 init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
804 /* (Re-)initialize the curses library. */
805 static void init_curses(void)
808 if (top.win && refresh() == ERR) /* refesh is really needed */
809 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
810 if (LINES < theme.lines_min || COLS < theme.cols_min)
811 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
812 " (need at least %dx%d)\n", COLS, LINES,
813 theme.cols_min, theme.lines_min);
814 curs_set(0); /* make cursor invisible, ignore errors */
815 nonl(); /* do not NL->CR/NL on output, always returns OK */
816 /* don't echo input */
818 msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
819 /* take input chars one at a time, no wait for \n */
821 msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
822 init_colors_or_die();
823 clear(); /* ignore non-fatal errors */
824 init_wins(theme.top_lines_default);
826 // noecho(); /* don't echo input */
829 static void check_sigchld(void)
834 ret = para_reap_child(&pid);
839 goto reap_next_child;
843 * This sucker modifies its first argument. *handler and *arg are
844 * pointers to 0-terminated strings (inside line). Crap.
846 static int split_key_map(char *line, char **handler, char **arg)
848 if (!(*handler = strchr(line + 1, ':')))
852 if (!(*arg = strchr(*handler, ':')))
861 static int check_key_map_args(void)
865 char *tmp = NULL, *handler, *arg;
867 for (i = 0; i < conf.key_map_given; ++i) {
868 s = conf.key_map_arg[i];
872 tmp = para_strdup(s);
873 if (!split_key_map(tmp, &handler, &arg))
875 if (strlen(handler) != 1)
884 if (find_cmd_byname(arg) < 0)
894 * React to various signal-related events
896 static void handle_signal(int sig)
900 msg_n_exit(EXIT_FAILURE,
901 "only the good die young (caught SIGTERM))\n");
911 PARA_WARNING_LOG("caught SIGINT, reset");
912 /* Nothing to do. SIGINT killed our child which gets noticed
913 * by do_select and resets everything.
917 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration");
926 static int open_stat_pipe(void)
929 int ret, fds[3] = {0, 1, 0};
936 * Sleep a bit to avoid a busy loop. As the call to sleep() may
937 * be interrupted by SIGCHLD, we simply wait until the call
942 ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
945 ret = mark_fd_nonblocking(fds[1]);
952 #define COMMAND_BUF_SIZE 32768
955 * This is the core select loop. Besides the (internal) signal
956 * pipe, the following other fds are checked according to the mode:
958 * GETCH_MODE: check stdin, return when key is pressed
960 * COMMAND_MODE: check command fds and stdin. Return when peer has closed both
961 * stdout and stderr or 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)
970 int ret, i, max_fileno;
971 char command_buf[2][COMMAND_BUF_SIZE] = {"", ""};
972 int cbo[2] = {0, 0}; /* command buf offsets */
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 (mode == COMMAND_MODE) {
989 if (command_fds[0] >= 0)
990 para_fd_set(command_fds[0], &rfds, &max_fileno);
991 if (command_fds[1] >= 0)
992 para_fd_set(command_fds[1], &rfds, &max_fileno);
994 if (mode == GETCH_MODE || mode == COMMAND_MODE)
995 para_fd_set(STDIN_FILENO, &rfds, &max_fileno);
996 ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
998 goto check_return; /* skip fd checks */
1000 ret = para_next_signal(&rfds);
1003 /* read command pipe if ready */
1004 if (mode == COMMAND_MODE) {
1005 for (i = 0; i < 2; i++) {
1007 if (command_fds[i] < 0)
1009 ret = read_nonblock(command_fds[i],
1010 command_buf[i] + cbo[i],
1011 COMMAND_BUF_SIZE - 1 - cbo[i], &rfds, &sz);
1014 cbo[i] = for_each_line(command_buf[i], cbo[i],
1015 add_output_line, &i);
1019 PARA_NOTICE_LOG("closing command fd %d: %s",
1020 i, para_strerror(-ret));
1021 close(command_fds[i]);
1022 command_fds[i] = -1;
1023 if (command_fds[!i] < 0) /* both fds closed */
1026 if (cbo[i] == COMMAND_BUF_SIZE - 1) {
1027 PARA_NOTICE_LOG("discarding overlong line");
1032 ret = read_stat_pipe(&rfds);
1034 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1038 free(stat_content[SI_BASENAME]);
1039 stat_content[SI_BASENAME] =
1040 para_strdup("stat command terminated!?");
1046 ret = wgetch(top.win);
1047 if (ret != ERR && ret != KEY_RESIZE) {
1048 if (command_fds[0] >= 0) {
1049 close(command_fds[0]);
1050 command_fds[0] = -1;
1052 if (command_fds[1] >= 0) {
1053 close(command_fds[1]);
1054 command_fds[1] = -1;
1057 kill(cmd_pid, SIGTERM);
1062 ret = wgetch(top.win);
1063 if (ret != ERR && ret != KEY_RESIZE)
1074 * read from command pipe and print data to bot window
1076 static void send_output(void)
1080 ret = mark_fd_nonblocking(command_fds[0]);
1083 ret = mark_fd_nonblocking(command_fds[1]);
1086 if (do_select(COMMAND_MODE) >= 0)
1087 PARA_INFO_LOG("command complete");
1089 PARA_NOTICE_LOG("command aborted");
1090 print_in_bar(COLOR_MSG, " ");
1093 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1094 close(command_fds[0]);
1095 close(command_fds[1]);
1098 static void para_cmd(char *cmd)
1100 int ret, fds[3] = {0, 1, 1};
1101 char *c = make_message(BINDIR "/para_client -- %s", cmd);
1103 outputf(COLOR_COMMAND, "%s", c);
1104 print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1105 ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
1109 command_fds[0] = fds[1];
1110 command_fds[1] = fds[2];
1115 * exec command and print output to bot win
1117 static void display_cmd(char *cmd)
1119 int fds[3] = {0, 1, 1};
1121 print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1122 outputf(COLOR_COMMAND, "%s", cmd);
1123 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1125 command_fds[0] = fds[1];
1126 command_fds[1] = fds[2];
1131 * shutdown curses and stat pipe before executing external commands
1133 static void external_cmd(char *cmd)
1135 int fds[3] = {-1, -1, -1};
1140 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1142 do_select(EXTERNAL_MODE);
1146 static void print_scroll_msg(void)
1148 unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1149 int first_rbe = first_visible_rbe(&lines_total);
1150 print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1151 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1154 static void com_scroll_top(void)
1156 int i = RINGBUFFER_SIZE - 1;
1159 while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1161 /* i is oldest entry */
1162 for (; lines < bot.lines && i >= 0; i--) {
1163 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1166 lines += NUM_LINES(strlen(rbe->msg));
1169 if (lines > 0 && scroll_position != i) {
1170 scroll_position = i;
1175 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1178 static void com_cancel_scrolling(void)
1181 if (scroll_position == 0) {
1182 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1185 scroll_position = 0;
1189 static void com_page_down(void)
1192 int i = scroll_position;
1193 while (lines < bot.lines && --i > 0) {
1194 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1197 lines += NUM_LINES(strlen(rbe->msg));
1200 scroll_position = i;
1205 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1208 static void com_page_up(void)
1211 int fvr = first_visible_rbe(&lines);
1213 if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1214 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1217 scroll_position = fvr + 1;
1218 for (; scroll_position > 0; scroll_position--) {
1219 first_visible_rbe(&lines);
1220 if (lines == bot.lines)
1227 static void com_scroll_down(void)
1229 struct rb_entry *rbe;
1232 if (!scroll_position) {
1233 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1237 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1238 rbe_lines = NUM_LINES(rbe->len);
1239 wscrl(bot.win, rbe_lines);
1240 wmove(bot.win, bot.lines - rbe_lines, 0);
1241 wattron(bot.win, COLOR_PAIR(rbe->color));
1242 waddstr(bot.win, rbe->msg);
1247 static void com_scroll_up(void)
1249 struct rb_entry *rbe = NULL;
1251 int i, first_rbe, num_scroll;
1253 /* the entry that is going to vanish */
1254 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1257 num_scroll = NUM_LINES(rbe->len);
1258 first_rbe = first_visible_rbe(&lines);
1259 if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1262 wscrl(bot.win, -num_scroll);
1263 i = draw_top_rbe(&lines);
1266 while (i > 0 && lines < num_scroll) {
1268 rbe = ringbuffer_get(bot_win_rb, --i);
1271 rbe_lines = NUM_LINES(rbe->len);
1273 // fprintf(stderr, "msg: %s\n", rbe->msg);
1274 wattron(bot.win, COLOR_PAIR(rbe->color));
1275 waddstr(bot.win, "\n");
1276 waddstr(bot.win, rbe->msg);
1285 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1288 static void com_ll_decr(void)
1290 if (loglevel <= LL_DEBUG) {
1291 print_in_bar(COLOR_ERRMSG,
1292 "loglevel already at maximal verbosity\n");
1296 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1299 static void com_ll_incr(void)
1301 if (loglevel >= LL_EMERG) {
1302 print_in_bar(COLOR_ERRMSG,
1303 "loglevel already at minimal verbosity\n");
1307 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1311 * reread configuration, terminate on errors
1313 static void com_reread_conf(void)
1315 char *cf =configfile_exists();
1316 struct gui_cmdline_parser_params params = {
1319 .check_required = 0,
1320 .check_ambiguity = 0,
1325 PARA_WARNING_LOG("there is no configuration to read");
1328 PARA_INFO_LOG("rereading command line options and config file");
1329 gui_cmdline_parser_ext(_argc, _argv, &conf, ¶ms);
1330 if (gui_cmdline_parser_config_file(cf, &conf, ¶ms) != 0) {
1331 PARA_EMERG_LOG("errors in config file");
1332 finish(EXIT_FAILURE);
1334 PARA_NOTICE_LOG("config file reloaded");
1335 if (check_key_map_args() < 0)
1336 finish(EXIT_FAILURE);
1339 static void com_help(void)
1343 for (i = 0; i < conf.key_map_given; ++i) {
1344 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1345 const char *handler_text = "???", *desc = NULL;
1347 if (!split_key_map(tmp, &handler, &arg)) {
1353 handler_text = "internal";
1354 desc = command_list[find_cmd_byname(arg)].description;
1356 case 'x': handler_text = "external"; break;
1357 case 'd': handler_text = "display "; break;
1358 case 'p': handler_text = "para "; break;
1360 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1361 strlen(arg) < 8? "\t" : "",
1365 for (i = 0; command_list[i].handler; i++) {
1366 struct gui_command gc = command_list[i];
1368 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1369 strlen(gc.name) < 8? "\t" : "",
1372 print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1376 static void com_shrink_top_win(void)
1378 if (top.lines <= theme.top_lines_min) {
1379 PARA_WARNING_LOG("can not decrease top window");
1382 init_wins(top.lines - 1);
1385 print_in_bar(COLOR_MSG, "%s", "decreased top window");
1388 static void com_enlarge_top_win(void)
1390 if (bot.lines < 3) {
1391 PARA_WARNING_LOG("can not increase top window");
1394 init_wins(top.lines + 1);
1397 print_in_bar(COLOR_MSG, "increased top window");
1400 static void com_version(void)
1402 print_in_bar(COLOR_MSG, "para_gui " PACKAGE_VERSION " \""
1406 __noreturn static void com_quit(void)
1411 static void com_refresh(void)
1417 static void change_theme(int next)
1423 /* This seems to be needed twice, why? */
1426 PARA_NOTICE_LOG("new theme: %s", theme.name);
1429 static void com_next_theme(void)
1434 static void com_prev_theme(void)
1440 static void handle_command(int c)
1444 /* first check user's key bindings */
1445 for (i = 0; i < conf.key_map_given; ++i) {
1446 char *tmp, *handler, *arg;
1448 tmp = para_strdup(conf.key_map_arg[i]);
1449 if (!split_key_map(tmp, &handler, &arg)) {
1453 if (strcmp(tmp, km_keyname(c))) {
1457 if (*handler == 'd')
1459 else if (*handler == 'x')
1461 else if (*handler == 'p')
1463 else if (*handler == 'i') {
1464 int num = find_cmd_byname(arg);
1466 command_list[num].handler();
1471 /* not found, check internal key bindings */
1472 for (i = 0; command_list[i].handler; i++) {
1473 if (!strcmp(km_keyname(c), command_list[i].key)) {
1474 command_list[i].handler();
1478 print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1482 int main(int argc, char *argv[])
1490 gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
1491 HANDLE_VERSION_FLAG("gui", conf);
1492 cf = configfile_exists();
1493 if (!cf && conf.config_file_given) {
1494 fprintf(stderr, "can not read config file %s\n",
1495 conf.config_file_arg);
1499 struct gui_cmdline_parser_params params = {
1502 .check_required = 0,
1503 .check_ambiguity = 0,
1506 if (gui_cmdline_parser_config_file(cf, &conf, ¶ms) != 0)
1509 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1510 if (check_key_map_args() < 0) {
1511 fprintf(stderr, "invalid key map\n");
1514 init_theme_or_die(conf.theme_arg, &theme);
1515 top.lines = theme.top_lines_default;
1516 setup_signal_handling();
1517 bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1518 initscr(); /* needed only once, always successful */
1523 ret = do_select(GETCH_MODE);
1526 print_in_bar(COLOR_MSG, " ");
1527 handle_command(ret);