1/****************************************************************************
2 * Copyright 2019,2020 Thomas E. Dickey                                     *
3 * Copyright 1998-2012,2013 Free Software Foundation, Inc.                  *
4 *                                                                          *
5 * Permission is hereby granted, free of charge, to any person obtaining a  *
6 * copy of this software and associated documentation files (the            *
7 * "Software"), to deal in the Software without restriction, including      *
8 * without limitation the rights to use, copy, modify, merge, publish,      *
9 * distribute, distribute with modifications, sublicense, and/or sell       *
10 * copies of the Software, and to permit persons to whom the Software is    *
11 * furnished to do so, subject to the following conditions:                 *
12 *                                                                          *
13 * The above copyright notice and this permission notice shall be included  *
14 * in all copies or substantial portions of the Software.                   *
15 *                                                                          *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
23 *                                                                          *
24 * Except as contained in this notice, the name(s) of the above copyright   *
25 * holders shall not be used in advertising or otherwise to promote the     *
26 * sale, use or other dealings in this Software without prior written       *
27 * authorization.                                                           *
28 ****************************************************************************/
29
30/****************************************************************************
31 *   Author:  Juergen Pfeifer, 1995,1997                                    *
32 ****************************************************************************/
33
34#include "form.priv.h"
35
36MODULE_ID("$Id: fld_max.c,v 1.16 2020/02/02 23:34:34 tom Exp $")
37
38/*---------------------------------------------------------------------------
39|   Facility      :  libnform
40|   Function      :  int set_max_field(FIELD *field, int maxgrow)
41|
42|   Description   :  Set the maximum growth for a dynamic field. If maxgrow=0
43|                    the field may grow to any possible size.
44|
45|   Return Values :  E_OK           - success
46|                    E_BAD_ARGUMENT - invalid argument
47+--------------------------------------------------------------------------*/
48NCURSES_EXPORT(int)
49set_max_field(FIELD *field, int maxgrow)
50{
51  T((T_CALLED("set_max_field(%p,%d)"), (void *)field, maxgrow));
52
53  if (!field || (maxgrow < 0))
54    RETURN(E_BAD_ARGUMENT);
55  else
56    {
57      bool single_line_field = Single_Line_Field(field);
58
59      if (maxgrow > 0)
60	{
61	  if (((single_line_field && (maxgrow < field->dcols)) ||
62	       (!single_line_field && (maxgrow < field->drows))) &&
63	      !Field_Has_Option(field, O_INPUT_LIMIT))
64	    RETURN(E_BAD_ARGUMENT);
65	}
66      field->maxgrow = maxgrow;
67      /* shrink */
68      if (maxgrow > 0 && Field_Has_Option(field, O_INPUT_LIMIT) &&
69	  field->dcols > maxgrow)
70	field->dcols = maxgrow;
71      ClrStatus(field, _MAY_GROW);
72      if (!((unsigned)field->opts & O_STATIC))
73	{
74	  if ((maxgrow == 0) ||
75	      (single_line_field && (field->dcols < maxgrow)) ||
76	      (!single_line_field && (field->drows < maxgrow)))
77	    SetStatus(field, _MAY_GROW);
78	}
79    }
80  RETURN(E_OK);
81}
82
83/* fld_max.c ends here */
84