contrib/ncurses/menu/m_pattern.c

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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
  40 MODULE_ID("$Id: m_pattern.c,v 1.15 2006/11/04 18:46:39 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 +--------------------------------------------------------------------------*/
  53 NCURSES_EXPORT(char *)
  54 menu_pattern(const MENU * menu)
  55 {
  56   static char empty[] = "";
  57
  58   T((T_CALLED("menu_pattern(%p)"), 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 +--------------------------------------------------------------------------*/
  75 NCURSES_EXPORT(int)
  76 set_menu_pattern(MENU * menu, const char *p)
  77 {
  78   ITEM *matchitem;
  79   int matchpos;
  80
  81   T((T_CALLED("set_menu_pattern(%p,%s)"), 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 */