abook_rl.c

   1 /*
   2  * $Id: abook_rl.c,v 1.11 2004/02/18 19:41:37 jheinonen Exp $
   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 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 #ifdef HANDLE_MULTIBYTE
  35 #       include <mbswidth.h>
  36 #endif
  37
  38 #define RL_READLINE_NAME        "Abook"
  39
  40 static int rl_x, rl_y;
  41 static WINDOW *rl_win;
  42
  43 static bool rl_cancelled;
  44
  45 static void
  46 rl_refresh()
  47 {
  48         /*refresh();*/
  49         wrefresh(rl_win);
  50 }
  51
  52 #ifdef HANDLE_MULTIBYTE
  53 static int
  54 rline_calc_point()
  55 {
  56         return (int)mbsnwidth(rl_line_buffer, rl_point, 0);
  57 }
  58 #endif
  59
  60 static void
  61 rline_update()
  62 {
  63 #ifdef HANDLE_MULTIBYTE
  64         int real_point = rline_calc_point() + rl_x;
  65 #else
  66         int real_point = rl_point + rl_x;
  67 #endif
  68
  69         if(real_point > (COLS - 1))
  70                 mvwaddnstr(rl_win, rl_y, rl_x,
  71                         rl_line_buffer + (1 + real_point - COLS),
  72                         COLS - rl_x - 1);
  73         else
  74                 mvwaddnstr(rl_win, rl_y, rl_x, rl_line_buffer, rl_end);
  75
  76         wclrtoeol(rl_win);
  77         wmove(rl_win, rl_y, min(real_point, COLS - 1));
  78
  79         rl_refresh();
  80 }
  81
  82 static void
  83 rline_compdisp(char **matches, int n, int max_len)
  84 {
  85         /* dummy */
  86 }
  87
  88 static int
  89 rl_cancel(int dummy1, int dummy2)
  90 {
  91         rl_cancelled = TRUE;
  92
  93         rl_done = 1;
  94
  95         return 0;
  96 }
  97
  98 static void
  99 abook_rl_init(bool use_completion)
 100 {
 101         rl_readline_name = RL_READLINE_NAME;
 102
 103 #if RL_VERSION_MAJOR >= 4
 104         rl_already_prompted = 1;
 105 #endif
 106         rl_catch_sigwinch = 0;
 107
 108         rl_redisplay_function = rline_update;
 109         rl_completion_display_matches_hook = rline_compdisp;
 110
 111         rl_unbind_function_in_map(rl_clear_screen, rl_get_keymap());
 112         rl_unbind_function_in_map(rl_reverse_search_history, rl_get_keymap());
 113         rl_unbind_function_in_map(rl_re_read_init_file, rl_get_keymap());
 114
 115         if(use_completion) {
 116                 rl_bind_key('\t', rl_menu_complete);
 117         } else {
 118                 rl_unbind_function_in_map(rl_complete, rl_get_keymap());
 119                 rl_unbind_function_in_map(rl_menu_complete, rl_get_keymap());
 120         }
 121
 122         rl_bind_key('g' & 31, rl_cancel); /* C-g */
 123
 124         clear_history();
 125
 126         rl_cancelled = FALSE;
 127 }
 128
 129 char *
 130 abook_readline(WINDOW *w, int y, int x, char *s, int limit, bool use_completion)
 131 {
 132         char *ret;
 133
 134         abook_rl_init(use_completion);
 135
 136         wmove(rl_win = w, rl_y = y, rl_x = x);
 137         rl_refresh();
 138
 139         if(s && *s)
 140                 add_history(s);
 141
 142 #ifdef KEYPAD_HACK
 143         keypad(w, FALSE);
 144 #endif
 145 #ifdef CBREAK_HACK
 146         nocbreak();
 147 #endif
 148         ret = readline(NULL);
 149 #ifdef CBREAK_HACK
 150         cbreak();
 151 #endif
 152 #ifdef KEYPAD_HACK
 153         keypad(w, TRUE);
 154 #endif
 155
 156         if(rl_cancelled && ret) {
 157                 free(ret);
 158                 ret = NULL;
 159         }
 160
 161         return ret;
 162 }
 163