abook_rl.c

   1 /*
   2  * $Id$
   3  *
   4  * by JH <jheinonen@users.sourceforge.net>
   5  *
   6  * Copyright (C) Jaakko Heinonen
   7  */
   8
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <sys/types.h>
  12 #include "abook.h"
  13 #include "abook_rl.h"
  14
  15 #ifdef HAVE_CONFIG_H
  16 #       include "config.h"
  17 #endif
  18
  19 #if defined(HAVE_READLINE_READLINE_H)
  20 #       include <readline/readline.h>
  21 #elif defined(HAVE_READLINE_H)
  22 #       include <readline.h>
  23 #endif
  24
  25 #if defined(HAVE_READLINE_HISTORY_H)
  26 #       include <readline/history.h>
  27 #elif defined(HAVE_HISTORY_H)
  28 #       include <history.h>
  29 #endif
  30
  31 #define RL_READLINE_NAME        "Abook"
  32
  33 static int rl_x, rl_y;
  34 static WINDOW *rl_win;
  35
  36 static bool rl_cancelled;
  37
  38 static void
  39 rl_refresh()
  40 {
  41         /*refresh();*/
  42         wrefresh(rl_win);
  43 }
  44
  45 static void
  46 rline_update()
  47 {
  48         int real_point = rl_point + rl_x;
  49
  50         if(real_point > (COLS - 1))
  51                 mvwaddnstr(rl_win, rl_y, rl_x,
  52                         rl_line_buffer + (1 + real_point - COLS),
  53                         COLS - rl_x - 1);
  54         else
  55                 mvwaddnstr(rl_win, rl_y, rl_x, rl_line_buffer, rl_end);
  56
  57         wclrtoeol(rl_win);
  58         wmove(rl_win, rl_y, min(real_point, COLS - 1));
  59
  60         rl_refresh();
  61 }
  62
  63 static void
  64 rline_compdisp(char **matches, int n, int max_len)
  65 {
  66         /* dummy */
  67 }
  68
  69 static int
  70 rl_cancel(int dummy1, int dummy2)
  71 {
  72         rl_cancelled = TRUE;
  73
  74         rl_done = 1;
  75
  76         return 0;
  77 }
  78
  79 static void
  80 abook_rl_init(bool use_completion)
  81 {
  82         rl_readline_name = RL_READLINE_NAME;
  83
  84         rl_already_prompted = 1;
  85         rl_catch_sigwinch = 0;
  86
  87         rl_redisplay_function = rline_update;
  88         rl_completion_display_matches_hook = rline_compdisp;
  89
  90         rl_unbind_function_in_map(rl_clear_screen, rl_get_keymap());
  91         rl_unbind_function_in_map(rl_reverse_search_history, rl_get_keymap());
  92         rl_unbind_function_in_map(rl_re_read_init_file, rl_get_keymap());
  93
  94         if(use_completion) {
  95                 rl_bind_key('\t', rl_menu_complete);
  96         } else {
  97                 rl_unbind_function_in_map(rl_complete, rl_get_keymap());
  98                 rl_unbind_function_in_map(rl_menu_complete, rl_get_keymap());
  99         }
 100
 101         rl_bind_key('g' & 31, rl_cancel); /* C-g */
 102
 103         clear_history();
 104
 105         rl_cancelled = FALSE;
 106 }
 107
 108 char *
 109 abook_readline(WINDOW *w, int y, int x, char *s, int limit, bool use_completion)
 110 {
 111         char *ret;
 112
 113         abook_rl_init(use_completion);
 114
 115         wmove(rl_win = w, rl_y = y, rl_x = x);
 116         rl_refresh();
 117
 118         if(s && *s)
 119                 add_history(s);
 120
 121         nocbreak();
 122         ret = readline(NULL);
 123         cbreak();
 124
 125         if(rl_cancelled && ret) {
 126                 free(ret);
 127                 ret = NULL;
 128         }
 129
 130         return ret;
 131 }
 132