1/****************************************************************************
2 * Copyright 2020 Thomas E. Dickey                                          *
3 * Copyright 1998-2006,2010 Free Software Foundation, Inc.                  *
4 *                                                                          *
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6 * copy of this software and associated documentation files (the            *
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10 * copies of the Software, and to permit persons to whom the Software is    *
11 * furnished to do so, subject to the following conditions:                 *
12 *                                                                          *
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14 * in all copies or substantial portions of the Software.                   *
15 *                                                                          *
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23 *                                                                          *
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28 ****************************************************************************/
29
30/****************************************************************************
31 *   Author:  Juergen Pfeifer, 1995,1997                                    *
32 ****************************************************************************/
33
34/***************************************************************************
35* Module m_pattern                                                         *
36* Pattern matching handling                                                *
37***************************************************************************/
38
39#include "menu.priv.h"
40
41MODULE_ID("$Id: m_pattern.c,v 1.17 2020/02/02 23:34:34 tom Exp $")
42
43/*---------------------------------------------------------------------------
44|   Facility      :  libnmenu
45|   Function      :  char *menu_pattern(const MENU *menu)
46|
47|   Description   :  Return the value of the pattern buffer.
48|
49|   Return Values :  NULL          - if there is no pattern buffer allocated
50|                    EmptyString   - if there is a pattern buffer but no
51|                                    pattern is stored
52|                    PatternString - as expected
53+--------------------------------------------------------------------------*/
54NCURSES_EXPORT(char *)
55menu_pattern(const MENU * menu)
56{
57  static char empty[] = "";
58
59  T((T_CALLED("menu_pattern(%p)"), (const void *)menu));
60  returnPtr(menu ? (menu->pattern ? menu->pattern : empty) : 0);
61}
62
63/*---------------------------------------------------------------------------
64|   Facility      :  libnmenu
65|   Function      :  int set_menu_pattern(MENU *menu, const char *p)
66|
67|   Description   :  Set the match pattern for a menu and position to the
68|                    first item that matches.
69|
70|   Return Values :  E_OK              - success
71|                    E_BAD_ARGUMENT    - invalid menu or pattern pointer
72|                    E_BAD_STATE       - menu in user hook routine
73|                    E_NOT_CONNECTED   - no items connected to menu
74|                    E_NO_MATCH        - no item matches pattern
75+--------------------------------------------------------------------------*/
76NCURSES_EXPORT(int)
77set_menu_pattern(MENU * menu, const char *p)
78{
79  ITEM *matchitem;
80  int matchpos;
81
82  T((T_CALLED("set_menu_pattern(%p,%s)"), (void *)menu, _nc_visbuf(p)));
83
84  if (!menu || !p)
85    RETURN(E_BAD_ARGUMENT);
86
87  if (!(menu->items))
88    RETURN(E_NOT_CONNECTED);
89
90  if (menu->status & _IN_DRIVER)
91    RETURN(E_BAD_STATE);
92
93  Reset_Pattern(menu);
94
95  if (!(*p))
96    {
97      pos_menu_cursor(menu);
98      RETURN(E_OK);
99    }
100
101  if (menu->status & _LINK_NEEDED)
102    _nc_Link_Items(menu);
103
104  matchpos = menu->toprow;
105  matchitem = menu->curitem;
106  assert(matchitem);
107
108  while (*p)
109    {
110      if (!isprint(UChar(*p)) ||
111	  (_nc_Match_Next_Character_In_Item_Name(menu, *p, &matchitem) != E_OK))
112	{
113	  Reset_Pattern(menu);
114	  pos_menu_cursor(menu);
115	  RETURN(E_NO_MATCH);
116	}
117      p++;
118    }
119
120  /* This is reached if there was a match. So we position to the new item */
121  Adjust_Current_Item(menu, matchpos, matchitem);
122  RETURN(E_OK);
123}
124
125/* m_pattern.c ends here */
126