xref: /freebsd/contrib/ncurses/menu/m_scale.c (revision 21817992b3314c908ab50f0bb88d2ee750b9c4ac)
1  /****************************************************************************
2   * Copyright 2020,2021 Thomas E. Dickey                                     *
3   * Copyright 1998-2004,2010 Free Software Foundation, Inc.                  *
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29  
30  /****************************************************************************
31   *   Author:  Juergen Pfeifer, 1995,1997                                    *
32   ****************************************************************************/
33  
34  /***************************************************************************
35  * Module m_scale                                                           *
36  * Menu scaling routine                                                     *
37  ***************************************************************************/
38  
39  #include "menu.priv.h"
40  
41  MODULE_ID("$Id: m_scale.c,v 1.14 2021/06/17 21:20:30 tom Exp $")
42  
43  /*---------------------------------------------------------------------------
44  |   Facility      :  libnmenu
45  |   Function      :  int scale_menu(const MENU *menu)
46  |
47  |   Description   :  Returns the minimum window size necessary for the
48  |                    subwindow of menu.
49  |
50  |   Return Values :  E_OK                  - success
51  |                    E_BAD_ARGUMENT        - invalid menu pointer
52  |                    E_NOT_CONNECTED       - no items are connected to menu
53  +--------------------------------------------------------------------------*/
MENU_EXPORT(int)54  MENU_EXPORT(int)
55  scale_menu(const MENU *menu, int *rows, int *cols)
56  {
57    T((T_CALLED("scale_menu(%p,%p,%p)"),
58       (const void *)menu,
59       (void *)rows,
60       (void *)cols));
61  
62    if (!menu)
63      RETURN(E_BAD_ARGUMENT);
64  
65    if (menu->items && *(menu->items))
66      {
67        if (rows)
68  	*rows = menu->height;
69        if (cols)
70  	*cols = menu->width;
71        RETURN(E_OK);
72      }
73    else
74      RETURN(E_NOT_CONNECTED);
75  }
76  
77  /* m_scale.c ends here */
78