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28
29/****************************************************************************
30 *   Author:  Juergen Pfeifer, 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 1.16 2010/01/23 21:20:10 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  static char empty[] = "";
57
58  T((T_CALLED("menu_pattern(%p)"), (const void *)menu));
59  returnPtr(menu ? (menu->pattern ? menu->pattern : empty) : 0);
60}
61
62/*---------------------------------------------------------------------------
63|   Facility      :  libnmenu
64|   Function      :  int set_menu_pattern(MENU *menu, const char *p)
65|
66|   Description   :  Set the match pattern for a menu and position to the
67|                    first item that matches.
68|
69|   Return Values :  E_OK              - success
70|                    E_BAD_ARGUMENT    - invalid menu or pattern pointer
71|                    E_BAD_STATE       - menu in user hook routine
72|                    E_NOT_CONNECTED   - no items connected to menu
73|                    E_NO_MATCH        - no item matches pattern
74+--------------------------------------------------------------------------*/
75NCURSES_EXPORT(int)
76set_menu_pattern(MENU * menu, const char *p)
77{
78  ITEM *matchitem;
79  int matchpos;
80
81  T((T_CALLED("set_menu_pattern(%p,%s)"), (void *)menu, _nc_visbuf(p)));
82
83  if (!menu || !p)
84    RETURN(E_BAD_ARGUMENT);
85
86  if (!(menu->items))
87    RETURN(E_NOT_CONNECTED);
88
89  if (menu->status & _IN_DRIVER)
90    RETURN(E_BAD_STATE);
91
92  Reset_Pattern(menu);
93
94  if (!(*p))
95    {
96      pos_menu_cursor(menu);
97      RETURN(E_OK);
98    }
99
100  if (menu->status & _LINK_NEEDED)
101    _nc_Link_Items(menu);
102
103  matchpos = menu->toprow;
104  matchitem = menu->curitem;
105  assert(matchitem);
106
107  while (*p)
108    {
109      if (!isprint(UChar(*p)) ||
110	  (_nc_Match_Next_Character_In_Item_Name(menu, *p, &matchitem) != E_OK))
111	{
112	  Reset_Pattern(menu);
113	  pos_menu_cursor(menu);
114	  RETURN(E_NO_MATCH);
115	}
116      p++;
117    }
118
119  /* This is reached if there was a match. So we position to the new item */
120  Adjust_Current_Item(menu, matchpos, matchitem);
121  RETURN(E_OK);
122}
123
124/* m_pattern.c ends here */
125