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 #define KEYPAD_HACK 1 /* enable a keypad hack */
  16 #define CBREAK_HACK 1 /* enable cbreak hack */
  17
  18 #ifdef HAVE_CONFIG_H
  19 #       include "config.h"
  20 #endif
  21
  22 #if defined(HAVE_READLINE_READLINE_H)
  23 #       include <readline/readline.h>
  24 #elif defined(HAVE_READLINE_H)
  25 #       include <readline.h>
  26 #endif
  27
  28 #if defined(HAVE_READLINE_HISTORY_H)
  29 #       include <readline/history.h>
  30 #elif defined(HAVE_HISTORY_H)
  31 #       include <history.h>
  32 #endif
  33
  34 #define RL_READLINE_NAME        "Abook"
  35
  36 static int rl_x, rl_y;
  37 static WINDOW *rl_win;
  38
  39 static bool rl_cancelled;
  40
  41 static void
  42 rl_refresh()
  43 {
  44         /*refresh();*/
  45         wrefresh(rl_win);
  46 }
  47
  48 static void
  49 rline_update()
  50 {
  51         int real_point = rl_point + rl_x;
  52
  53         if(real_point > (COLS - 1))
  54                 mvwaddnstr(rl_win, rl_y, rl_x,
  55                         rl_line_buffer + (1 + real_point - COLS),
  56                         COLS - rl_x - 1);
  57         else
  58                 mvwaddnstr(rl_win, rl_y, rl_x, rl_line_buffer, rl_end);
  59
  60         wclrtoeol(rl_win);
  61         wmove(rl_win, rl_y, min(real_point, COLS - 1));
  62
  63         rl_refresh();
  64 }
  65
  66 static void
  67 rline_compdisp(char **matches, int n, int max_len)
  68 {
  69         /* dummy */
  70 }
  71
  72 static int
  73 rl_cancel(int dummy1, int dummy2)
  74 {
  75         rl_cancelled = TRUE;
  76
  77         rl_done = 1;
  78
  79         return 0;
  80 }
  81
  82 static void
  83 abook_rl_init(bool use_completion)
  84 {
  85         rl_readline_name = RL_READLINE_NAME;
  86
  87         rl_already_prompted = 1;
  88         rl_catch_sigwinch = 0;
  89
  90         rl_redisplay_function = rline_update;
  91         rl_completion_display_matches_hook = rline_compdisp;
  92
  93         rl_unbind_function_in_map(rl_clear_screen, rl_get_keymap());
  94         rl_unbind_function_in_map(rl_reverse_search_history, rl_get_keymap());
  95         rl_unbind_function_in_map(rl_re_read_init_file, rl_get_keymap());
  96
  97         if(use_completion) {
  98                 rl_bind_key('\t', rl_menu_complete);
  99         } else {
 100                 rl_unbind_function_in_map(rl_complete, rl_get_keymap());
 101                 rl_unbind_function_in_map(rl_menu_complete, rl_get_keymap());
 102         }
 103
 104         rl_bind_key('g' & 31, rl_cancel); /* C-g */
 105
 106         clear_history();
 107
 108         rl_cancelled = FALSE;
 109 }
 110
 111 char *
 112 abook_readline(WINDOW *w, int y, int x, char *s, int limit, bool use_completion)
 113 {
 114         char *ret;
 115
 116         abook_rl_init(use_completion);
 117
 118         wmove(rl_win = w, rl_y = y, rl_x = x);
 119         rl_refresh();
 120
 121         if(s && *s)
 122                 add_history(s);
 123
 124 #ifdef KEYPAD_HACK
 125         keypad(w, FALSE);
 126 #endif
 127 #ifdef CBREAK_HACK
 128         nocbreak();
 129 #endif
 130         ret = readline(NULL);
 131 #ifdef CBREAK_HACK
 132         cbreak();
 133 #endif
 134 #ifdef KEYPAD_HACK
 135         keypad(w, TRUE);
 136 #endif
 137
 138         if(rl_cancelled && ret) {
 139                 free(ret);
 140                 ret = NULL;
 141         }
 142
 143         return ret;
 144 }
 145