diff options
Diffstat (limited to 'client/birdc.c')
| -rw-r--r-- | client/birdc.c | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/client/birdc.c b/client/birdc.c new file mode 100644 index 00000000..9dd6d9b9 --- /dev/null +++ b/client/birdc.c @@ -0,0 +1,223 @@ +/* + * BIRD Client - Readline variant I/O + * + * (c) 1999--2004 Martin Mares <mj@ucw.cz> + * + * Can be freely distributed and used under the terms of the GNU GPL. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <termios.h> + +#include <readline/readline.h> +#include <readline/history.h> +#include <curses.h> + +#include "nest/bird.h" +#include "lib/resource.h" +#include "lib/string.h" +#include "client/client.h" +#include "sysdep/unix/unix.h" + +static int input_hidden_end; +static int prompt_active; + +/*** Input ***/ + +/* HACK: libreadline internals we need to access */ +extern int _rl_vis_botlin; +extern void _rl_move_vert(int); +extern Function *rl_last_func; + +static void +add_history_dedup(char *cmd) +{ + /* Add history line if it differs from the last one */ + HIST_ENTRY *he = history_get(history_length); + if (!he || strcmp(he->line, cmd)) + add_history(cmd); +} + +static void +input_got_line(char *cmd_buffer) +{ + if (!cmd_buffer) + { + cleanup(); + exit(0); + } + + if (cmd_buffer[0]) + { + add_history_dedup(cmd_buffer); + submit_command(cmd_buffer); + } + + free(cmd_buffer); +} + +void +input_start_list(void) +{ + /* Leave the currently edited line and make space for listing */ + _rl_move_vert(_rl_vis_botlin); +#ifdef HAVE_RL_CRLF + rl_crlf(); +#endif +} + +void +input_stop_list(void) +{ + /* Reprint the currently edited line after listing */ + rl_on_new_line(); + rl_redisplay(); +} + +static int +input_complete(int arg UNUSED, int key UNUSED) +{ + static int complete_flag; + char buf[256]; + + if (rl_last_func != input_complete) + complete_flag = 0; + switch (cmd_complete(rl_line_buffer, rl_point, buf, complete_flag)) + { + case 0: + complete_flag = 1; + break; + case 1: + rl_insert_text(buf); + break; + default: + complete_flag = 1; +#ifdef HAVE_RL_DING + rl_ding(); +#endif + } + return 0; +} + +static int +input_help(int arg, int key UNUSED) +{ + int i, in_string, in_bracket; + + if (arg != 1) + return rl_insert(arg, '?'); + + in_string = in_bracket = 0; + for (i = 0; i < rl_point; i++) + { + + if (rl_line_buffer[i] == '"') + in_string = ! in_string; + else if (! in_string) + { + if (rl_line_buffer[i] == '[') + in_bracket++; + else if (rl_line_buffer[i] == ']') + in_bracket--; + } + } + + /* `?' inside string or path -> insert */ + if (in_string || in_bracket) + return rl_insert(1, '?'); + + rl_begin_undo_group(); /* HACK: We want to display `?' at point position */ + rl_insert_text("?"); + rl_redisplay(); + rl_end_undo_group(); + input_start_list(); + cmd_help(rl_line_buffer, rl_point); + rl_undo_command(1, 0); + input_stop_list(); + return 0; +} + +void +input_init(void) +{ + rl_readline_name = "birdc"; + rl_add_defun("bird-complete", input_complete, '\t'); + rl_add_defun("bird-help", input_help, '?'); + rl_callback_handler_install("bird> ", input_got_line); + + // rl_get_screen_size(); + term_lns = LINES ? LINES : 25; + term_cls = COLS ? COLS : 80; + + prompt_active = 1; + + // readline library does strange things when stdin is nonblocking. + // if (fcntl(0, F_SETFL, O_NONBLOCK) < 0) + // die("fcntl: %m"); +} + +static void +input_reveal(void) +{ + /* need this, otherwise some lib seems to eat pending output when + the prompt is displayed */ + fflush(stdout); + tcdrain(STDOUT_FILENO); + + rl_end = input_hidden_end; + rl_expand_prompt("bird> "); + rl_forced_update_display(); + + prompt_active = 1; +} + +static void +input_hide(void) +{ + input_hidden_end = rl_end; + rl_end = 0; + rl_expand_prompt(""); + rl_redisplay(); + + prompt_active = 0; +} + +void +input_notify(int prompt) +{ + if (prompt == prompt_active) + return; + + if (prompt) + input_reveal(); + else + input_hide(); +} + +void +input_read(void) +{ + rl_callback_read_char(); +} + +void +more_begin(void) +{ +} + +void +more_end(void) +{ +} + +void +cleanup(void) +{ + if (init) + return; + + input_hide(); + rl_callback_handler_remove(); +} |