1/****************************************************************************
2 * Copyright (c) 1998-2003,2004 Free Software Foundation, Inc.              *
3 *                                                                          *
4 * Permission is hereby granted, free of charge, to any person obtaining a  *
5 * copy of this software and associated documentation files (the            *
6 * "Software"), to deal in the Software without restriction, including      *
7 * without limitation the rights to use, copy, modify, merge, publish,      *
8 * distribute, distribute with modifications, sublicense, and/or sell       *
9 * copies of the Software, and to permit persons to whom the Software is    *
10 * furnished to do so, subject to the following conditions:                 *
11 *                                                                          *
12 * The above copyright notice and this permission notice shall be included  *
13 * in all copies or substantial portions of the Software.                   *
14 *                                                                          *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
22 *                                                                          *
23 * Except as contained in this notice, the name(s) of the above copyright   *
24 * holders shall not be used in advertising or otherwise to promote the     *
25 * sale, use or other dealings in this Software without prior written       *
26 * authorization.                                                           *
27 ****************************************************************************/
28
29/****************************************************************************
30 *   Author:  Juergen Pfeifer, 1995,1997                                    *
31 ****************************************************************************/
32
33#include "form.priv.h"
34
35MODULE_ID("$Id: fld_current.c,v 1.11 2004/12/25 22:40:13 tom Exp $")
36
37/*---------------------------------------------------------------------------
38|   Facility      :  libnform
39|   Function      :  int set_current_field(FORM  * form,FIELD * field)
40|
41|   Description   :  Set the current field of the form to the specified one.
42|
43|   Return Values :  E_OK              - success
44|                    E_BAD_ARGUMENT    - invalid form or field pointer
45|                    E_REQUEST_DENIED  - field not selectable
46|                    E_BAD_STATE       - called from a hook routine
47|                    E_INVALID_FIELD   - current field can't be left
48|                    E_SYSTEM_ERROR    - system error
49+--------------------------------------------------------------------------*/
50NCURSES_EXPORT(int)
51set_current_field(FORM *form, FIELD *field)
52{
53  int err = E_OK;
54
55  T((T_CALLED("set_current_field(%p,%p)"), form, field));
56  if (form == 0 || field == 0)
57    {
58      RETURN(E_BAD_ARGUMENT);
59    }
60  else if ((form != field->form) || Field_Is_Not_Selectable(field))
61    {
62      RETURN(E_REQUEST_DENIED);
63    }
64  else if ((form->status & _POSTED) == 0)
65    {
66      form->current = field;
67      form->curpage = field->page;
68    }
69  else
70    {
71      if ((form->status & _IN_DRIVER) != 0)
72	{
73	  err = E_BAD_STATE;
74	}
75      else
76	{
77	  if (form->current != field)
78	    {
79	      if (!_nc_Internal_Validation(form))
80		{
81		  err = E_INVALID_FIELD;
82		}
83	      else
84		{
85		  Call_Hook(form, fieldterm);
86		  if (field->page != form->curpage)
87		    {
88		      Call_Hook(form, formterm);
89		      err = _nc_Set_Form_Page(form, (int)field->page, field);
90		      Call_Hook(form, forminit);
91		    }
92		  else
93		    {
94		      err = _nc_Set_Current_Field(form, field);
95		    }
96		  Call_Hook(form, fieldinit);
97		  (void)_nc_Refresh_Current_Field(form);
98		}
99	    }
100	}
101    }
102  RETURN(err);
103}
104
105/*---------------------------------------------------------------------------
106|   Facility      :  libnform
107|   Function      :  FIELD *current_field(const FORM * form)
108|
109|   Description   :  Return the current field.
110|
111|   Return Values :  Pointer to the current field.
112+--------------------------------------------------------------------------*/
113NCURSES_EXPORT(FIELD *)
114current_field(const FORM *form)
115{
116  T((T_CALLED("current_field(%p)"), form));
117  returnField(Normalize_Form(form)->current);
118}
119
120/*---------------------------------------------------------------------------
121|   Facility      :  libnform
122|   Function      :  int field_index(const FIELD * field)
123|
124|   Description   :  Return the index of the field in the field-array of
125|                    the form.
126|
127|   Return Values :  >= 0   : field index
128|                    -1     : fieldpointer invalid or field not connected
129+--------------------------------------------------------------------------*/
130NCURSES_EXPORT(int)
131field_index(const FIELD *field)
132{
133  T((T_CALLED("field_index(%p)"), field));
134  returnCode((field != 0 && field->form != 0) ? (int)field->index : -1);
135}
136
137/* fld_current.c ends here */
138