/* * 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" 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); 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; term_cls = COLS; prompt_active = 1; // readline library does strange things when stdin is nonblocking. // if (fcntl(0, F_SETFL, O_NONBLOCK) < 0) // DIE("fcntl"); } 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(); }