Merge branch 't/testsuite'
[paraslash.git] / gui.c
diff --git a/gui.c b/gui.c
index 31987c4..38addd9 100644 (file)
--- a/gui.c
+++ b/gui.c
@@ -1,5 +1,5 @@
 /*
 /*
- * Copyright (C) 1998-2010 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 1998-2011 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -54,7 +54,7 @@ static int cmd_died, curses_active;
 static pid_t cmd_pid;
 
 static int command_pipe = -1;
 static pid_t cmd_pid;
 
 static int command_pipe = -1;
-static int audiod_pipe = -1;
+static int stat_pipe = -1;
 static struct gui_args_info conf;
 
 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
 static struct gui_args_info conf;
 
 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
@@ -109,6 +109,8 @@ static void com_scroll_up(void);
 static void com_scroll_down(void);
 static void com_page_up(void);
 static void com_page_down(void);
 static void com_scroll_down(void);
 static void com_page_up(void);
 static void com_page_down(void);
+static void com_cancel_scrolling(void);
+static void com_scroll_top(void);
 
 static struct gui_command command_list[] = {
        {
 
 static struct gui_command command_list[] = {
        {
@@ -186,25 +188,21 @@ static struct gui_command command_list[] = {
                .name = "page_down",
                .description = "scroll down one page",
                .handler = com_page_down
                .name = "page_down",
                .description = "scroll down one page",
                .handler = com_page_down
+       }, {
+               .key = "<home>",
+               .name = "scroll_top",
+               .description = "scroll to top of buffer",
+               .handler = com_scroll_top
+       }, {
+               .key = "<end>",
+               .name = "cancel_scroll",
+               .description = "deactivate scroll mode",
+               .handler = com_cancel_scrolling
        }, {
                .handler = NULL
        }
 };
 
        }, {
                .handler = NULL
        }
 };
 
-static int para_open_audiod_pipe(char *cmd)
-{
-       int fds[3] = {0, 1, 0};
-       pid_t pid;
-       int ret = para_exec_cmdline_pid(&pid, cmd, fds);
-       if (ret < 0)
-               return ret;
-       ret = mark_fd_nonblocking(fds[1]);
-       if (ret > 0)
-               return fds[1];
-       close(fds[1]);
-       return ret;
-}
-
 static int find_cmd_byname(char *name)
 {
        int i;
 static int find_cmd_byname(char *name)
 {
        int i;
@@ -244,6 +242,14 @@ static char *km_keyname(int c)
                sprintf(buf, "<ppage>");
                return buf;
        }
                sprintf(buf, "<ppage>");
                return buf;
        }
+       if (c == KEY_HOME) {
+               sprintf(buf, "<home>");
+               return buf;
+       }
+       if (c == KEY_END) {
+               sprintf(buf, "<end>");
+               return buf;
+       }
        if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
                if (c < 0)
                        c += 256;
        if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
                if (c < 0)
                        c += 256;
@@ -308,9 +314,9 @@ static int align_str(WINDOW* win, char *str, unsigned int len,
                str[len] = '\0';
                num = 0;
        }
                str[len] = '\0';
                num = 0;
        }
-       /* replace newlines by spaces */
+       /* replace control characters by spaces */
        for (i = 0; i < len && str[i]; i++) {
        for (i = 0; i < len && str[i]; i++) {
-               if (str[i] == '\n')
+               if (str[i] == '\n' || str[i] == '\r' || str[i] == '\f')
                        str[i] = ' ';
        }
        if (align == LEFT) {
                        str[i] = ' ';
        }
        if (align == LEFT) {
@@ -394,11 +400,13 @@ static int draw_top_rbe(unsigned *lines)
        rbe = ringbuffer_get(bot_win_rb, fvr);
        if (!rbe)
                return -1;
        rbe = ringbuffer_get(bot_win_rb, fvr);
        if (!rbe)
                return -1;
-       /* first rbe might be only partially visible */
-       offset = (*lines - bot.lines) * bot.cols;
        len = strlen(rbe->msg);
        len = strlen(rbe->msg);
-       if (offset < 0 || len < offset)
-               return -1;
+       if (*lines > bot.lines) {
+               /* first rbe is only partially visible */
+               offset = (*lines - bot.lines) * bot.cols;
+               assert(offset <= len);
+       } else
+               offset = 0;
        wattron(bot.win, COLOR_PAIR(rbe->color));
        waddstr(bot.win, rbe->msg + offset);
        *lines = NUM_LINES(len - offset);
        wattron(bot.win, COLOR_PAIR(rbe->color));
        waddstr(bot.win, rbe->msg + offset);
        *lines = NUM_LINES(len - offset);
@@ -649,14 +657,6 @@ static void init_wins(int top_lines)
        doupdate();
 }
 
        doupdate();
 }
 
-static void check_geometry(void)
-{
-       if (LINES < theme.lines_min || COLS < theme.cols_min)
-               msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
-                       " (need at least %dx%d)\n", COLS, LINES,
-                       theme.cols_min, theme.lines_min);
-}
-
 /*
  * Print stat item #i to curses window
  */
 /*
  * Print stat item #i to curses window
  */
@@ -708,14 +708,14 @@ print:
        return 1;
 }
 
        return 1;
 }
 
-static int read_audiod_pipe(fd_set *rfds)
+static int read_stat_pipe(fd_set *rfds)
 {
        static char *buf;
        static int bufsize, loaded;
        int ret, ret2;
        size_t sz;
 
 {
        static char *buf;
        static int bufsize, loaded;
        int ret, ret2;
        size_t sz;
 
-       if (audiod_pipe < 0)
+       if (stat_pipe < 0)
                return 0;
        if (loaded >= bufsize) {
                if (bufsize > 1000 * 1000) {
                return 0;
        if (loaded >= bufsize) {
                if (bufsize > 1000 * 1000) {
@@ -726,7 +726,7 @@ static int read_audiod_pipe(fd_set *rfds)
                buf = para_realloc(buf, bufsize);
        }
        assert(loaded < bufsize);
                buf = para_realloc(buf, bufsize);
        }
        assert(loaded < bufsize);
-       ret = read_nonblock(audiod_pipe, buf + loaded, bufsize - loaded,
+       ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
                rfds, &sz);
        loaded += sz;
        ret2 = for_each_stat_item(buf, loaded, update_item);
                rfds, &sz);
        loaded += sz;
        ret2 = for_each_stat_item(buf, loaded, update_item);
@@ -761,53 +761,60 @@ static void clear_all_items(void)
        }
 }
 
        }
 }
 
-static void init_colors(void)
+static void init_pair_or_die(short pair, short f, short b)
+{
+       if (init_pair(pair, f, b) == ERR)
+               msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
+}
+
+static void init_colors_or_die(void)
 {
        int i;
 
        if (!has_colors())
 {
        int i;
 
        if (!has_colors())
-               msg_n_exit(EXIT_FAILURE, "Error: No color term\n");
-       start_color();
+               msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
+       if (start_color() == ERR)
+               msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
        FOR_EACH_STATUS_ITEM(i)
                if (theme.data[i].len)
        FOR_EACH_STATUS_ITEM(i)
                if (theme.data[i].len)
-                       init_pair(i + 1, theme.data[i].fg, theme.data[i].bg);
-       init_pair(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
-       init_pair(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
-       init_pair(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
-       init_pair(COLOR_MSG, theme.msg_fg, theme.msg_bg);
-       init_pair(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
-       init_pair(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
-       init_pair(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
-       init_pair(COLOR_TOP, theme.default_fg, theme.default_bg);
-       init_pair(COLOR_BOT, theme.default_fg, theme.default_bg);
+                       init_pair_or_die(i + 1, theme.data[i].fg,
+                               theme.data[i].bg);
+       init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
+       init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
+       init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
+       init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
+       init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
+       init_pair_or_die(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
+       init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
+       init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
+       init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
 }
 
 }
 
-/*
- * (re-)initialize the curses library  FIXME: Error checking
- */
+/* (Re-)initialize the curses library. */
 static void init_curses(void)
 {
        curses_active = 1;
 static void init_curses(void)
 {
        curses_active = 1;
-       if (top.win && refresh() == ERR) /* refesh is really needed */
+       if (top.win && refresh() == ERR) /* refesh is really needed */
                msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
                msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
-       }
-       check_geometry();
+       if (LINES < theme.lines_min || COLS < theme.cols_min)
+               msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
+                       " (need at least %dx%d)\n", COLS, LINES,
+                       theme.cols_min, theme.lines_min);
        curs_set(0); /* make cursor invisible, ignore errors */
        curs_set(0); /* make cursor invisible, ignore errors */
-//     if (noraw() == ERR);
-//             msg_n_exit(EXIT_FAILURE, "can not place terminal out of "
-//                     "raw mode\n");
-       nonl(); /* tell curses not to do NL->CR/NL on output */
-       noecho(); /* don't echo input */
-       cbreak(); /* take input chars one at a time, no wait for \n */
-       //reset_prog_mode();
-       init_colors();
-       clear();
+       nonl(); /* do not NL->CR/NL on output, always returns OK */
+       /* don't echo input */
+       if (noecho() == ERR)
+               msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
+       /* take input chars one at a time, no wait for \n */
+       if (cbreak() == ERR)
+               msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
+       init_colors_or_die();
+       clear(); /* ignore non-fatal errors */
        init_wins(theme.top_lines_default);
        print_all_items();
        init_wins(theme.top_lines_default);
        print_all_items();
-       noecho(); /* don't echo input */
+       // noecho(); /* don't echo input */
 }
 
 }
 
-
 static void check_sigchld(void)
 {
        int ret;
 static void check_sigchld(void)
 {
        int ret;
@@ -907,15 +914,30 @@ static void handle_signal(int sig)
        }
 }
 
        }
 }
 
-static int open_audiod_pipe(void)
+static int open_stat_pipe(void)
 {
        static int init = 1;
 {
        static int init = 1;
+       int ret, fds[3] = {0, 1, 0};
+       pid_t pid;
 
        if (init)
                init = 0;
        else
 
        if (init)
                init = 0;
        else
-               sleep(1);
-       return para_open_audiod_pipe(conf.stat_cmd_arg);
+               /*
+                * Sleep a bit to avoid a busy loop. As the call to sleep() may
+                * be interrupted by SIGCHLD, we simply wait until the call
+                * succeeds.
+                */
+               while (sleep(2))
+                       ; /* nothing */
+       ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
+       if (ret < 0)
+               return ret;
+       ret = mark_fd_nonblocking(fds[1]);
+       if (ret >= 0)
+               return fds[1];
+       close(fds[1]);
+       return ret;
 }
 
 /*
 }
 
 /*
@@ -946,11 +968,10 @@ repeat:
 //     ret = refresh_status();
        FD_ZERO(&rfds);
        max_fileno = 0;
 //     ret = refresh_status();
        FD_ZERO(&rfds);
        max_fileno = 0;
-       /* audiod pipe */
-       if (audiod_pipe < 0)
-               audiod_pipe = open_audiod_pipe();
-       if (audiod_pipe >= 0)
-               para_fd_set(audiod_pipe, &rfds, &max_fileno);
+       if (stat_pipe < 0)
+               stat_pipe = open_stat_pipe();
+       if (stat_pipe >= 0)
+               para_fd_set(stat_pipe, &rfds, &max_fileno);
        /* signal pipe */
        para_fd_set(signal_pipe, &rfds, &max_fileno);
        /* command pipe only for COMMAND_MODE */
        /* signal pipe */
        para_fd_set(signal_pipe, &rfds, &max_fileno);
        /* command pipe only for COMMAND_MODE */
@@ -981,11 +1002,11 @@ repeat:
                        return 0;
                }
        }
                        return 0;
                }
        }
-       ret = read_audiod_pipe(&rfds);
+       ret = read_stat_pipe(&rfds);
        if (ret < 0) {
        if (ret < 0) {
-               PARA_NOTICE_LOG("closing audiod pipe: %s\n", para_strerror(-ret));
-               close(audiod_pipe);
-               audiod_pipe = -1;
+               PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
+               close(stat_pipe);
+               stat_pipe = -1;
                clear_all_items();
                free(stat_content[SI_BASENAME]);
                stat_content[SI_BASENAME] =
                clear_all_items();
                free(stat_content[SI_BASENAME]);
                stat_content[SI_BASENAME] =
@@ -1097,6 +1118,41 @@ static void print_scroll_msg(void)
                filled - scroll_position, ringbuffer_filled(bot_win_rb));
 }
 
                filled - scroll_position, ringbuffer_filled(bot_win_rb));
 }
 
+static void com_scroll_top(void)
+{
+       int i = RINGBUFFER_SIZE - 1;
+       unsigned lines = 0;
+
+       while (i > 0 && !ringbuffer_get(bot_win_rb, i))
+               i--;
+       /* i is oldest entry */
+       for (; lines < bot.lines && i >= 0; i--) {
+               struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
+               if (!rbe)
+                       break;
+               lines += NUM_LINES(strlen(rbe->msg));
+       }
+       i++;
+       if (lines > 0 && scroll_position != i) {
+               scroll_position = i;
+               redraw_bot_win();
+               print_scroll_msg();
+               return;
+       }
+       print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
+}
+
+static void com_cancel_scrolling(void)
+{
+
+       if (scroll_position == 0) {
+               print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
+               return;
+       }
+       scroll_position = 0;
+       redraw_bot_win();
+}
+
 static void com_page_down(void)
 {
        unsigned lines = 0;
 static void com_page_down(void)
 {
        unsigned lines = 0;
@@ -1228,7 +1284,8 @@ static void com_reread_conf(void)
                .override = 1,
                .initialize = 1,
                .check_required = 0,
                .override = 1,
                .initialize = 1,
                .check_required = 0,
-               .check_ambiguity = 0
+               .check_ambiguity = 0,
+               .print_errors = 0,
        };
 
        if (!cf) {
        };
 
        if (!cf) {
@@ -1236,8 +1293,11 @@ static void com_reread_conf(void)
                return;
        }
        PARA_INFO_LOG("rereading command line options and config file");
                return;
        }
        PARA_INFO_LOG("rereading command line options and config file");
-       gui_cmdline_parser(_argc, _argv, &conf);
-       gui_cmdline_parser_config_file(cf, &conf, &params);
+       gui_cmdline_parser_ext(_argc, _argv, &conf, &params);
+       if (gui_cmdline_parser_config_file(cf, &conf, &params) != 0) {
+               PARA_EMERG_LOG("errors in config file");
+               finish(EXIT_FAILURE);
+       }
        PARA_NOTICE_LOG("config file reloaded");
        if (check_key_map_args() < 0)
                finish(EXIT_FAILURE);
        PARA_NOTICE_LOG("config file reloaded");
        if (check_key_map_args() < 0)
                finish(EXIT_FAILURE);
@@ -1394,17 +1454,9 @@ int main(int argc, char *argv[])
        _argc = argc;
        _argv = argv;
 
        _argc = argc;
        _argv = argv;
 
-       if (gui_cmdline_parser(argc, argv, &conf)) {
-               fprintf(stderr, "parse error while reading command line\n");
+       if (gui_cmdline_parser(argc, argv, &conf) != 0)
                exit(EXIT_FAILURE);
                exit(EXIT_FAILURE);
-       }
        HANDLE_VERSION_FLAG("gui", conf);
        HANDLE_VERSION_FLAG("gui", conf);
-       init_theme(0, &theme);
-       top.lines = theme.top_lines_default;
-       if (check_key_map_args() < 0) {
-               fprintf(stderr, "invalid key map\n");
-               exit(EXIT_FAILURE);
-       }
        cf = configfile_exists();
        if (!cf && conf.config_file_given) {
                fprintf(stderr, "can not read config file %s\n",
        cf = configfile_exists();
        if (!cf && conf.config_file_given) {
                fprintf(stderr, "can not read config file %s\n",
@@ -1416,15 +1468,19 @@ int main(int argc, char *argv[])
                        .override = 0,
                        .initialize = 0,
                        .check_required = 0,
                        .override = 0,
                        .initialize = 0,
                        .check_required = 0,
-                       .check_ambiguity = 0
+                       .check_ambiguity = 0,
+                       .print_errors = 1,
                };
                };
-               gui_cmdline_parser_config_file(cf, &conf, &params);
+               if (gui_cmdline_parser_config_file(cf, &conf, &params) != 0)
+                       exit(EXIT_FAILURE);
        }
        loglevel = get_loglevel_by_name(conf.loglevel_arg);
        if (check_key_map_args() < 0) {
        }
        loglevel = get_loglevel_by_name(conf.loglevel_arg);
        if (check_key_map_args() < 0) {
-               fprintf(stderr, "invalid key map in config file\n");
+               fprintf(stderr, "invalid key map\n");
                exit(EXIT_FAILURE);
        }
                exit(EXIT_FAILURE);
        }
+       init_theme_or_die(conf.theme_arg, &theme);
+       top.lines = theme.top_lines_default;
        setup_signal_handling();
        bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
        initscr(); /* needed only once, always successful */
        setup_signal_handling();
        bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
        initscr(); /* needed only once, always successful */