m_pattern.c revision 76726 
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2 * Copyright (c) 1998,2000 Free Software Foundation, Inc.                   *
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28
29/****************************************************************************
30 *   Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997            *
31 ****************************************************************************/
32
33/***************************************************************************
34* Module m_pattern                                                         *
35* Pattern matching handling                                                *
36***************************************************************************/
37
38#include "menu.priv.h"
39
40MODULE_ID("$Id: m_pattern.c,v 1.6 2000/12/10 02:16:48 tom Exp $")
41
42/*---------------------------------------------------------------------------
43|   Facility      :  libnmenu
44|   Function      :  char *menu_pattern(const MENU *menu)
45|
46|   Description   :  Return the value of the pattern buffer.
47|
48|   Return Values :  NULL          - if there is no pattern buffer allocated
49|                    EmptyString   - if there is a pattern buffer but no
50|                                    pattern is stored
51|                    PatternString - as expected
52+--------------------------------------------------------------------------*/
53NCURSES_EXPORT(char *)
54menu_pattern (const MENU * menu)
55{
56  return (menu ? (menu->pattern ? menu->pattern : "") : (char *)0);
57}
58
59/*---------------------------------------------------------------------------
60|   Facility      :  libnmenu
61|   Function      :  int set_menu_pattern(MENU *menu, const char *p)
62|
63|   Description   :  Set the match pattern for a menu and position to the
64|                    first item that matches.
65|
66|   Return Values :  E_OK              - success
67|                    E_BAD_ARGUMENT    - invalid menu or pattern pointer
68|                    E_NOT_CONNECTED   - no items connected to menu
69|                    E_BAD_STATE       - menu in user hook routine
70|                    E_NO_MATCH        - no item matches pattern
71+--------------------------------------------------------------------------*/
72NCURSES_EXPORT(int)
73set_menu_pattern (MENU *menu, const char *p)
74{
75  ITEM *matchitem;
76  int   matchpos;
77
78  if (!menu || !p)
79    RETURN(E_BAD_ARGUMENT);
80
81  if (!(menu->items))
82    RETURN(E_NOT_CONNECTED);
83
84  if ( menu->status & _IN_DRIVER )
85    RETURN(E_BAD_STATE);
86
87  Reset_Pattern(menu);
88
89  if (!(*p))
90    {
91      pos_menu_cursor(menu);
92      RETURN(E_OK);
93    }
94
95  if (menu->status & _LINK_NEEDED)
96    _nc_Link_Items(menu);
97
98  matchpos  = menu->toprow;
99  matchitem = menu->curitem;
100  assert(matchitem);
101
102  while(*p)
103    {
104      if ( !isprint((unsigned char)(*p)) ||
105	  (_nc_Match_Next_Character_In_Item_Name(menu,*p,&matchitem) != E_OK) )
106	{
107	  Reset_Pattern(menu);
108	  pos_menu_cursor(menu);
109	  RETURN(E_NO_MATCH);
110	}
111      p++;
112    }
113
114  /* This is reached if there was a match. So we position to the new item */
115  Adjust_Current_Item(menu,matchpos,matchitem);
116  RETURN(E_OK);
117}
118
119/* m_pattern.c ends here */
120