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>
15 #include "gui.cmdline.h"
19 #include "ringbuffer.h"
27 /** define the array of error lists needed by para_gui */
29 static char *stat_content[NUM_STAT_ITEMS];
31 #define STANDARD_STATUS_BAR "para_gui " PACKAGE_VERSION " (hit ? for help)"
33 static int signal_pipe;
35 static struct win_data {
41 } top, bot, sb, in, sep;
43 #define RINGBUFFER_SIZE 512
49 static struct ringbuffer *bot_win_rb;
50 #define NUM_LINES(len) (1 + (len) / bot.cols)
52 static unsigned scroll_position;
54 static int curses_active;
57 static int command_fds[2];
58 static int stat_pipe = -1;
59 static struct gui_args_info conf;
61 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
64 #define COLOR_STATUSBAR 52
65 #define COLOR_COMMAND 53
66 #define COLOR_OUTPUT 54
68 #define COLOR_ERRMSG 56
69 #define COLOR_WELCOME 57
70 #define COLOR_SEPARATOR 58
77 const char *description;
78 void (*handler)(void);
84 char postfix[MAXLINE];
90 char content[MAXLINE];
93 static struct gui_theme theme;
98 static void com_help(void);
99 static void com_reread_conf(void);
100 static void com_enlarge_top_win(void);
101 static void com_shrink_top_win(void);
102 static void com_version(void);
103 __noreturn static void com_quit(void);
104 static void com_refresh(void);
105 static void com_ll_incr(void);
106 static void com_ll_decr(void);
107 static void com_prev_theme(void);
108 static void com_next_theme(void);
109 static void com_scroll_up(void);
110 static void com_scroll_down(void);
111 static void com_page_up(void);
112 static void com_page_down(void);
113 static void com_cancel_scrolling(void);
114 static void com_scroll_top(void);
116 static struct gui_command command_list[] = {
120 .description = "print help",
124 .name = "enlarge_win",
125 .description = "enlarge the top window",
126 .handler = com_enlarge_top_win
129 .name = "shrink_win",
130 .description = "shrink the top window",
131 .handler = com_shrink_top_win
134 .name = "reread_conf",
135 .description = "reread configuration file",
136 .handler = com_reread_conf
140 .description = "exit para_gui",
145 .description = "redraw the screen",
146 .handler = com_refresh
149 .name = "next_theme",
150 .description = "switch to next theme",
151 .handler = com_next_theme
154 .name = "prev_theme",
155 .description = "switch to previous stream",
156 .handler = com_prev_theme
160 .description = "increase loglevel (decreases verbosity)",
161 .handler = com_ll_incr
165 .description = "decrease loglevel (increases verbosity)",
166 .handler = com_ll_decr
170 .description = "show the para_gui version",
171 .handler = com_version
175 .description = "scroll up one line",
176 .handler = com_scroll_up
179 .name = "scroll_down",
180 .description = "scroll down one line",
181 .handler = com_scroll_down
185 .description = "scroll up one page",
186 .handler = com_page_up
190 .description = "scroll down one page",
191 .handler = com_page_down
194 .name = "scroll_top",
195 .description = "scroll to top of buffer",
196 .handler = com_scroll_top
199 .name = "cancel_scroll",
200 .description = "deactivate scroll mode",
201 .handler = com_cancel_scrolling
207 static int find_cmd_byname(char *name)
211 for (i = 0; command_list[i].handler; i++)
212 if (!strcmp(command_list[i].name, name))
217 /* taken from mutt */
218 static char *km_keyname(int c)
223 sprintf(buf, "<up>");
227 sprintf(buf, "<down>");
231 sprintf(buf, "<left>");
234 if (c == KEY_RIGHT) {
235 sprintf(buf, "<right>");
238 if (c == KEY_NPAGE) {
239 sprintf(buf, "<npage>");
242 if (c == KEY_PPAGE) {
243 sprintf(buf, "<ppage>");
247 sprintf(buf, "<home>");
251 sprintf(buf, "<end>");
254 if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
259 buf[1] = (c + '@') & 0x7f;
262 snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
263 (c >> 3) & 7, c & 7);
264 } else if (c >= KEY_F0 && c < KEY_F(256))
265 sprintf(buf, "<F%d>", c - KEY_F0);
267 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
269 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
273 static char *configfile_exists(void)
275 static char *config_file;
278 if (!conf.config_file_given) {
280 char *home = para_homedir();
281 config_file = make_message("%s/.paraslash/gui.conf",
287 tmp = conf.config_file_arg;
288 return file_exists(tmp)? tmp: NULL;
291 /* Print given number of spaces to curses window. */
292 static void add_spaces(WINDOW* win, unsigned int num)
295 unsigned sz = sizeof(space);
309 * print aligned string to curses window. This function always prints
312 static int align_str(WINDOW* win, char *str, unsigned int len,
315 int i, num; /* of spaces */
319 num = len - strlen(str);
324 /* replace control characters by spaces */
325 for (i = 0; i < len && str[i]; i++) {
326 if (str[i] == '\n' || str[i] == '\r' || str[i] == '\f')
331 add_spaces(win, num);
332 } else if (align == RIGHT) {
333 add_spaces(win, num);
336 add_spaces(win, num / 2);
337 waddstr(win, str[0]? str: "");
338 add_spaces(win, num - num / 2);
343 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
350 wattron(in.win, COLOR_PAIR(color));
352 xvasprintf(&msg, fmt, ap);
355 align_str(in.win, msg, sb.cols, LEFT);
361 * update the status bar
363 static void print_status_bar(void)
369 tmp = para_strdup(STANDARD_STATUS_BAR);
371 align_str(sb.win, tmp, sb.cols, CENTER);
377 * get the number of the oldest rbe that is (partially) visible. On return,
378 * lines contains the sum of the number of lines of all visable entries. If the
379 * first one is only partially visible, lines is greater than bot.lines.
381 static int first_visible_rbe(unsigned *lines)
385 for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
386 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
390 // fprintf(stderr, "found: %s\n", rbe->msg);
391 rbe_lines = NUM_LINES(rbe->len);
392 if (rbe_lines > bot.lines)
395 if (*lines >= bot.lines)
398 return RINGBUFFER_SIZE - 1;
401 static int draw_top_rbe(unsigned *lines)
404 int offset, fvr = first_visible_rbe(lines);
405 struct rb_entry *rbe;
409 wmove(bot.win, 0, 0);
410 rbe = ringbuffer_get(bot_win_rb, fvr);
413 len = strlen(rbe->msg);
414 if (*lines > bot.lines) {
415 /* first rbe is only partially visible */
416 offset = (*lines - bot.lines) * bot.cols;
417 assert(offset <= len);
420 wattron(bot.win, COLOR_PAIR(rbe->color));
421 waddstr(bot.win, rbe->msg + offset);
422 *lines = NUM_LINES(len - offset);
426 static void redraw_bot_win(void)
431 wmove(bot.win, 0, 0);
433 i = draw_top_rbe(&lines);
436 while (i > 0 && lines < bot.lines) {
437 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
440 waddstr(bot.win, "\n");
443 lines += NUM_LINES(rbe->len);
444 wattron(bot.win, COLOR_PAIR(rbe->color));
445 waddstr(bot.win, "\n");
446 waddstr(bot.win, rbe->msg);
452 static void rb_add_entry(int color, char *msg)
454 struct rb_entry *old, *new = para_malloc(sizeof(struct rb_entry));
457 new->len = strlen(msg);
459 old = ringbuffer_add(bot_win_rb, new);
460 // fprintf(stderr, "added: %s\n", new->msg);
465 if (scroll_position) {
466 /* discard current scrolling, like xterm does */
471 wattron(bot.win, COLOR_PAIR(color));
472 getyx(bot.win, y, x);
474 waddstr(bot.win, "\n");
475 waddstr(bot.win, msg);
479 * print formated output to bot win and refresh
481 __printf_2_3 static void outputf(int color, const char* fmt,...)
489 xvasprintf(&msg, fmt, ap);
491 rb_add_entry(color, msg);
495 static int add_output_line(char *line, void *data)
497 int color = *(int *)data? COLOR_ERRMSG : COLOR_OUTPUT;
500 rb_add_entry(color, para_strdup(line));
506 __printf_2_3 void curses_log(int ll, const char *fmt,...)
512 if (ll < loglevel || !curses_active)
521 color = COLOR_ERRMSG;
524 xvasprintf(&msg, fmt, ap);
527 rb_add_entry(color, msg);
530 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
532 static void setup_signal_handling(void)
534 signal_pipe = para_signal_init();
535 para_install_sighandler(SIGINT);
536 para_install_sighandler(SIGTERM);
537 para_install_sighandler(SIGCHLD);
538 para_install_sighandler(SIGWINCH);
539 para_install_sighandler(SIGUSR1);
540 para_sigaction(SIGHUP, SIG_IGN);
543 /* kill every process in the process group and exit */
544 __noreturn static void kill_pg_and_die(int ret)
546 para_sigaction(SIGTERM, SIG_IGN);
551 static void shutdown_curses(void)
560 __noreturn static void finish(int ret)
563 kill_pg_and_die(ret);
567 * exit curses and print given message to stdout/stderr
569 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
572 FILE *outfd = ret? stderr: stdout;
576 vfprintf(outfd, fmt, argp);
578 kill_pg_and_die(ret);
581 static void print_welcome(void)
583 if (loglevel > LL_NOTICE)
585 outputf(COLOR_WELCOME, "Welcome to para_gui " PACKAGE_VERSION
586 " \"" CODENAME "\". Theme: %s", theme.name);
593 static void init_wins(int top_lines)
597 top.lines = top_lines;
602 bot.lines = LINES - top.lines - 3;
604 bot.begy = top.lines + 1;
619 sep.begy = top.lines;
622 assume_default_colors(theme.default_fg, theme.default_bg);
624 mvwin(top.win, top.begy, top.begx);
625 wresize(top.win, top.lines, top.cols);
627 mvwin(sb.win, sb.begy, sb.begx);
628 wresize(sb.win, sb.lines, sb.cols);
630 mvwin(sep.win, sep.begy, sep.begx);
631 wresize(sep.win, sep.lines, sep.cols);
633 mvwin(bot.win, bot.begy, bot.begx);
634 wresize(bot.win, bot.lines, bot.cols);
636 mvwin(in.win, in.begy, in.begx);
637 wresize(in.win, in.lines, in.cols);
639 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
640 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
641 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
642 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
643 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
644 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
645 msg_n_exit(1, "Error: Cannot create curses windows\n");
649 scrollok(bot.win, 1);
650 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
651 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
652 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
653 wattron(top.win, COLOR_PAIR(COLOR_TOP));
665 wmove(sep.win, 0, 0);
666 for (i = 1; i <= COLS; i++)
667 waddstr(sep.win, theme.sep_str);
670 wnoutrefresh(top.win);
671 wnoutrefresh(bot.win);
672 //wnoutrefresh(sb.win);
674 wnoutrefresh(in.win);
675 wnoutrefresh(sep.win);
680 * Print stat item #i to curses window
682 static void print_stat_item(int i)
685 struct stat_item_data d = theme.data[i];
686 char *c = stat_content[i];
688 if (!curses_active || !d.len || !c)
690 tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
691 wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
693 wattron(top.win, COLOR_PAIR(i + 1));
694 align_str(top.win, tmp, d.len * COLS / 100, d.align);
699 static int update_item(int item_num, char *buf)
701 char **c = stat_content + item_num;
708 *c = para_strdup("(artist tag not set)");
711 *c = para_strdup("(title tag not set)");
714 *c = para_strdup("????");
717 *c = para_strdup("(album tag not set)");
720 *c = para_strdup("(comment tag not set)");
724 *c = para_strdup(buf);
726 print_stat_item(item_num);
730 static int read_stat_pipe(fd_set *rfds)
733 static int bufsize, loaded;
739 if (loaded >= bufsize) {
740 if (bufsize > 1000 * 1000) {
744 bufsize += bufsize + 1000;
745 buf = para_realloc(buf, bufsize);
747 assert(loaded < bufsize);
748 ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
751 ret2 = for_each_stat_item(buf, loaded, update_item);
752 if (ret < 0 || ret2 < 0) {
754 return ret2 < 0? ret2 : ret;
756 sz = ret2; /* what is left */
757 if (sz > 0 && sz < loaded)
758 memmove(buf, buf + loaded - sz, sz);
763 static void print_all_items(void)
769 FOR_EACH_STATUS_ITEM(i)
773 static void clear_all_items(void)
777 FOR_EACH_STATUS_ITEM(i) {
778 free(stat_content[i]);
779 stat_content[i] = para_strdup("");
783 static void init_pair_or_die(short pair, short f, short b)
785 if (init_pair(pair, f, b) == ERR)
786 msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
789 static void init_colors_or_die(void)
794 msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
795 if (start_color() == ERR)
796 msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
797 FOR_EACH_STATUS_ITEM(i)
798 if (theme.data[i].len)
799 init_pair_or_die(i + 1, theme.data[i].fg,
801 init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
802 init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
803 init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
804 init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
805 init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
806 init_pair_or_die(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
807 init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
808 init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
809 init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
812 /* (Re-)initialize the curses library. */
813 static void init_curses(void)
816 if (top.win && refresh() == ERR) /* refesh is really needed */
817 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
818 if (LINES < theme.lines_min || COLS < theme.cols_min)
819 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
820 " (need at least %dx%d)\n", COLS, LINES,
821 theme.cols_min, theme.lines_min);
822 curs_set(0); /* make cursor invisible, ignore errors */
823 nonl(); /* do not NL->CR/NL on output, always returns OK */
824 /* don't echo input */
826 msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
827 /* take input chars one at a time, no wait for \n */
829 msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
830 init_colors_or_die();
831 clear(); /* ignore non-fatal errors */
832 init_wins(theme.top_lines_default);
834 // noecho(); /* don't echo input */
837 static void check_sigchld(void)
842 ret = para_reap_child(&pid);
847 goto reap_next_child;
851 * This sucker modifies its first argument. *handler and *arg are
852 * pointers to 0-terminated strings (inside line). Crap.
854 static int split_key_map(char *line, char **handler, char **arg)
856 if (!(*handler = strchr(line + 1, ':')))
860 if (!(*arg = strchr(*handler, ':')))
869 static int check_key_map_args(void)
873 char *tmp = NULL, *handler, *arg;
875 for (i = 0; i < conf.key_map_given; ++i) {
876 s = conf.key_map_arg[i];
880 tmp = para_strdup(s);
881 if (!split_key_map(tmp, &handler, &arg))
883 if (strlen(handler) != 1)
892 if (find_cmd_byname(arg) < 0)
902 * React to various signal-related events
904 static void handle_signal(int sig)
908 msg_n_exit(EXIT_FAILURE,
909 "only the good die young (caught SIGTERM))\n");
919 PARA_WARNING_LOG("caught SIGINT, reset");
920 /* Nothing to do. SIGINT killed our child which gets noticed
921 * by do_select and resets everything.
925 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration");
934 static void status_pre_select(fd_set *rfds, int *max_fileno, struct timeval *tv)
936 static struct timeval next_exec, atm, diff;
937 int ret, fds[3] = {0, 1, 0};
942 /* Avoid busy loop */
943 gettimeofday(&atm, NULL);
944 if (tv_diff(&next_exec, &atm, &diff) > 0) {
945 if (tv_diff(&diff, tv, NULL) < 0)
949 next_exec.tv_sec = atm.tv_sec + 2;
950 ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
953 ret = mark_fd_nonblocking(fds[1]);
960 para_fd_set(stat_pipe, rfds, max_fileno);
963 #define COMMAND_BUF_SIZE 32768
966 * This is the core select loop. Besides the (internal) signal
967 * pipe, the following other fds are checked according to the mode:
969 * GETCH_MODE: check stdin, return when key is pressed
971 * COMMAND_MODE: check command fds and stdin. Return when peer has closed both
972 * stdout and stderr or when any key is pressed.
974 * EXTERNAL_MODE: Check only signal pipe. Used when an external command
975 * is running. During that time curses is disabled. Returns when
978 static int do_select(int mode)
981 int ret, i, max_fileno;
982 char command_buf[2][COMMAND_BUF_SIZE] = {"", ""};
983 int cbo[2] = {0, 0}; /* command buf offsets */
987 tv.tv_sec = conf.timeout_arg / 1000;
988 tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
989 // ret = refresh_status();
992 status_pre_select(&rfds, &max_fileno, &tv);
994 para_fd_set(signal_pipe, &rfds, &max_fileno);
995 /* command pipe only for COMMAND_MODE */
996 if (mode == COMMAND_MODE) {
997 if (command_fds[0] >= 0)
998 para_fd_set(command_fds[0], &rfds, &max_fileno);
999 if (command_fds[1] >= 0)
1000 para_fd_set(command_fds[1], &rfds, &max_fileno);
1002 if (mode == GETCH_MODE || mode == COMMAND_MODE)
1003 para_fd_set(STDIN_FILENO, &rfds, &max_fileno);
1004 ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
1006 goto check_return; /* skip fd checks */
1008 ret = para_next_signal(&rfds);
1011 /* read command pipe if ready */
1012 if (mode == COMMAND_MODE) {
1013 for (i = 0; i < 2; i++) {
1015 if (command_fds[i] < 0)
1017 ret = read_nonblock(command_fds[i],
1018 command_buf[i] + cbo[i],
1019 COMMAND_BUF_SIZE - 1 - cbo[i], &rfds, &sz);
1022 cbo[i] = for_each_line(0, command_buf[i], cbo[i],
1023 add_output_line, &i);
1027 PARA_NOTICE_LOG("closing command fd %d: %s",
1028 i, para_strerror(-ret));
1029 close(command_fds[i]);
1030 command_fds[i] = -1;
1031 if (command_fds[!i] < 0) /* both fds closed */
1034 if (cbo[i] == COMMAND_BUF_SIZE - 1) {
1035 PARA_NOTICE_LOG("discarding overlong line");
1040 ret = read_stat_pipe(&rfds);
1042 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1046 free(stat_content[SI_BASENAME]);
1047 stat_content[SI_BASENAME] =
1048 para_strdup("stat command terminated!?");
1054 ret = wgetch(top.win);
1055 if (ret != ERR && ret != KEY_RESIZE) {
1056 if (command_fds[0] >= 0) {
1057 close(command_fds[0]);
1058 command_fds[0] = -1;
1060 if (command_fds[1] >= 0) {
1061 close(command_fds[1]);
1062 command_fds[1] = -1;
1065 kill(cmd_pid, SIGTERM);
1070 ret = wgetch(top.win);
1071 if (ret != ERR && ret != KEY_RESIZE)
1082 * read from command pipe and print data to bot window
1084 static void send_output(void)
1088 ret = mark_fd_nonblocking(command_fds[0]);
1091 ret = mark_fd_nonblocking(command_fds[1]);
1094 if (do_select(COMMAND_MODE) >= 0)
1095 PARA_INFO_LOG("command complete");
1097 PARA_NOTICE_LOG("command aborted");
1098 print_in_bar(COLOR_MSG, " ");
1101 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1102 close(command_fds[0]);
1103 close(command_fds[1]);
1106 static void para_cmd(char *cmd)
1108 int ret, fds[3] = {0, 1, 1};
1109 char *c = make_message(BINDIR "/para_client -- %s", cmd);
1111 outputf(COLOR_COMMAND, "%s", c);
1112 print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1113 ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
1117 command_fds[0] = fds[1];
1118 command_fds[1] = fds[2];
1123 * exec command and print output to bot win
1125 static void display_cmd(char *cmd)
1127 int fds[3] = {0, 1, 1};
1129 print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1130 outputf(COLOR_COMMAND, "%s", cmd);
1131 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1133 command_fds[0] = fds[1];
1134 command_fds[1] = fds[2];
1139 * shutdown curses and stat pipe before executing external commands
1141 static void external_cmd(char *cmd)
1143 int fds[3] = {-1, -1, -1};
1148 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1150 do_select(EXTERNAL_MODE);
1154 static void print_scroll_msg(void)
1156 unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1157 int first_rbe = first_visible_rbe(&lines_total);
1158 print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1159 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1162 static void com_scroll_top(void)
1164 int i = RINGBUFFER_SIZE - 1;
1167 while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1169 /* i is oldest entry */
1170 for (; lines < bot.lines && i >= 0; i--) {
1171 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1174 lines += NUM_LINES(strlen(rbe->msg));
1177 if (lines > 0 && scroll_position != i) {
1178 scroll_position = i;
1183 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1186 static void com_cancel_scrolling(void)
1189 if (scroll_position == 0) {
1190 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1193 scroll_position = 0;
1197 static void com_page_down(void)
1200 int i = scroll_position;
1201 while (lines < bot.lines && --i > 0) {
1202 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1205 lines += NUM_LINES(strlen(rbe->msg));
1208 scroll_position = i;
1213 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1216 static void com_page_up(void)
1219 int fvr = first_visible_rbe(&lines);
1221 if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1222 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1225 scroll_position = fvr + 1;
1226 for (; scroll_position > 0; scroll_position--) {
1227 first_visible_rbe(&lines);
1228 if (lines == bot.lines)
1235 static void com_scroll_down(void)
1237 struct rb_entry *rbe;
1240 if (!scroll_position) {
1241 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1245 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1246 rbe_lines = NUM_LINES(rbe->len);
1247 wscrl(bot.win, rbe_lines);
1248 wmove(bot.win, bot.lines - rbe_lines, 0);
1249 wattron(bot.win, COLOR_PAIR(rbe->color));
1250 waddstr(bot.win, rbe->msg);
1255 static void com_scroll_up(void)
1257 struct rb_entry *rbe = NULL;
1259 int i, first_rbe, num_scroll;
1261 /* the entry that is going to vanish */
1262 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1265 num_scroll = NUM_LINES(rbe->len);
1266 first_rbe = first_visible_rbe(&lines);
1267 if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1270 wscrl(bot.win, -num_scroll);
1271 i = draw_top_rbe(&lines);
1274 while (i > 0 && lines < num_scroll) {
1276 rbe = ringbuffer_get(bot_win_rb, --i);
1279 rbe_lines = NUM_LINES(rbe->len);
1281 // fprintf(stderr, "msg: %s\n", rbe->msg);
1282 wattron(bot.win, COLOR_PAIR(rbe->color));
1283 waddstr(bot.win, "\n");
1284 waddstr(bot.win, rbe->msg);
1293 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1296 static void com_ll_decr(void)
1298 if (loglevel <= LL_DEBUG) {
1299 print_in_bar(COLOR_ERRMSG,
1300 "loglevel already at maximal verbosity\n");
1304 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1307 static void com_ll_incr(void)
1309 if (loglevel >= LL_EMERG) {
1310 print_in_bar(COLOR_ERRMSG,
1311 "loglevel already at minimal verbosity\n");
1315 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1319 * reread configuration, terminate on errors
1321 static void com_reread_conf(void)
1323 char *cf =configfile_exists();
1324 struct gui_cmdline_parser_params params = {
1327 .check_required = 0,
1328 .check_ambiguity = 0,
1333 PARA_WARNING_LOG("there is no configuration to read");
1336 PARA_INFO_LOG("rereading command line options and config file");
1337 gui_cmdline_parser_ext(_argc, _argv, &conf, ¶ms);
1338 if (gui_cmdline_parser_config_file(cf, &conf, ¶ms) != 0) {
1339 PARA_EMERG_LOG("errors in config file");
1340 finish(EXIT_FAILURE);
1342 PARA_NOTICE_LOG("config file reloaded");
1343 if (check_key_map_args() < 0)
1344 finish(EXIT_FAILURE);
1347 static void com_help(void)
1351 for (i = 0; i < conf.key_map_given; ++i) {
1352 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1353 const char *handler_text = "???", *desc = NULL;
1355 if (!split_key_map(tmp, &handler, &arg)) {
1361 handler_text = "internal";
1362 desc = command_list[find_cmd_byname(arg)].description;
1364 case 'x': handler_text = "external"; break;
1365 case 'd': handler_text = "display "; break;
1366 case 'p': handler_text = "para "; break;
1368 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1369 strlen(arg) < 8? "\t" : "",
1373 for (i = 0; command_list[i].handler; i++) {
1374 struct gui_command gc = command_list[i];
1376 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1377 strlen(gc.name) < 8? "\t" : "",
1380 print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1384 static void com_shrink_top_win(void)
1386 if (top.lines <= theme.top_lines_min) {
1387 PARA_WARNING_LOG("can not decrease top window");
1390 init_wins(top.lines - 1);
1393 print_in_bar(COLOR_MSG, "%s", "decreased top window");
1396 static void com_enlarge_top_win(void)
1398 if (bot.lines < 3) {
1399 PARA_WARNING_LOG("can not increase top window");
1402 init_wins(top.lines + 1);
1405 print_in_bar(COLOR_MSG, "increased top window");
1408 static void com_version(void)
1410 print_in_bar(COLOR_MSG, "para_gui " PACKAGE_VERSION " \""
1414 __noreturn static void com_quit(void)
1419 static void com_refresh(void)
1425 static void change_theme(int next)
1431 /* This seems to be needed twice, why? */
1434 PARA_NOTICE_LOG("new theme: %s", theme.name);
1437 static void com_next_theme(void)
1442 static void com_prev_theme(void)
1448 static void handle_command(int c)
1452 /* first check user's key bindings */
1453 for (i = 0; i < conf.key_map_given; ++i) {
1454 char *tmp, *handler, *arg;
1456 tmp = para_strdup(conf.key_map_arg[i]);
1457 if (!split_key_map(tmp, &handler, &arg)) {
1461 if (strcmp(tmp, km_keyname(c))) {
1465 if (*handler == 'd')
1467 else if (*handler == 'x')
1469 else if (*handler == 'p')
1471 else if (*handler == 'i') {
1472 int num = find_cmd_byname(arg);
1474 command_list[num].handler();
1479 /* not found, check internal key bindings */
1480 for (i = 0; command_list[i].handler; i++) {
1481 if (!strcmp(km_keyname(c), command_list[i].key)) {
1482 command_list[i].handler();
1486 print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1490 int main(int argc, char *argv[])
1498 gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
1499 HANDLE_VERSION_FLAG("gui", conf);
1500 cf = configfile_exists();
1501 if (!cf && conf.config_file_given) {
1502 fprintf(stderr, "can not read config file %s\n",
1503 conf.config_file_arg);
1507 struct gui_cmdline_parser_params params = {
1510 .check_required = 0,
1511 .check_ambiguity = 0,
1514 if (gui_cmdline_parser_config_file(cf, &conf, ¶ms) != 0)
1517 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1518 if (check_key_map_args() < 0) {
1519 fprintf(stderr, "invalid key map\n");
1522 init_theme_or_die(conf.theme_arg, &theme);
1523 top.lines = theme.top_lines_default;
1524 setup_signal_handling();
1525 bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1526 initscr(); /* needed only once, always successful */
1531 ret = do_select(GETCH_MODE);
1534 print_in_bar(COLOR_MSG, " ");
1535 handle_command(ret);