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