contrib/ncurses-5.4/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 1.9 2003/12/06 17:22:10 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 +--------------------------------------------------------------------------*/
  53 NCURSES_EXPORT(char *)
  54 menu_pattern (const MENU * menu)
  55 {
  56   return (char *)(menu ? (menu->pattern ? menu->pattern : "") : 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 +--------------------------------------------------------------------------*/
  72 NCURSES_EXPORT(int)
  73 set_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 */