form/fld_current.c

   1 /****************************************************************************
   2  * Copyright (c) 1998 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    *
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  21  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
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  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 <juergen.pfeifer@gmx.net> 1995,1997            *
  31  ****************************************************************************/
  32 #include "form.priv.h"
  33
  34 MODULE_ID("$Id: fld_current.c,v 1.4 1999/05/16 17:16:46 juergen Exp $")
  35
  36 /*---------------------------------------------------------------------------
  37 |   Facility      :  libnform
  38 |   Function      :  int set_current_field(FORM  * form,FIELD * field)
  39 |
  40 |   Description   :  Set the current field of the form to the specified one.
  41 |
  42 |   Return Values :  E_OK              - success
  43 |                    E_BAD_ARGUMENT    - invalid form or field pointer
  44 |                    E_REQUEST_DENIED  - field not selectable
  45 |                    E_BAD_STATE       - called from a hook routine
  46 |                    E_INVALID_FIELD   - current field can't be left
  47 |                    E_SYSTEM_ERROR    - system error
  48 +--------------------------------------------------------------------------*/
  49 int set_current_field(FORM  * form, FIELD * field)
  50 {
  51   int err = E_OK;
  52
  53   if ( !form || !field )
  54     RETURN(E_BAD_ARGUMENT);
  55
  56   if ( (form != field->form) || Field_Is_Not_Selectable(field) )
  57     RETURN(E_REQUEST_DENIED);
  58
  59   if (!(form->status & _POSTED))
  60     {
  61       form->current = field;
  62       form->curpage = field->page;
  63   }
  64   else
  65     {
  66       if (form->status & _IN_DRIVER)
  67         err = E_BAD_STATE;
  68       else
  69         {
  70           if (form->current != field)
  71             {
  72               if (!_nc_Internal_Validation(form))
  73                err = E_INVALID_FIELD;
  74               else
  75                 {
  76                   Call_Hook(form,fieldterm);
  77                   if (field->page != form->curpage)
  78                     {
  79                       Call_Hook(form,formterm);
  80                       err = _nc_Set_Form_Page(form,field->page,field);
  81                       Call_Hook(form,forminit);
  82                     }
  83                   else
  84                     {
  85                       err = _nc_Set_Current_Field(form,field);
  86                     }
  87                   Call_Hook(form,fieldinit);
  88                   _nc_Refresh_Current_Field(form);
  89                 }
  90             }
  91         }
  92     }
  93   RETURN(err);
  94 }
  95
  96 /*---------------------------------------------------------------------------
  97 |   Facility      :  libnform
  98 |   Function      :  FIELD *current_field(const FORM * form)
  99 |
 100 |   Description   :  Return the current field.
 101 |
 102 |   Return Values :  Pointer to the current field.
 103 +--------------------------------------------------------------------------*/
 104 FIELD *current_field(const FORM * form)
 105 {
 106   return Normalize_Form(form)->current;
 107 }
 108
 109 /*---------------------------------------------------------------------------
 110 |   Facility      :  libnform
 111 |   Function      :  int field_index(const FIELD * field)
 112 |
 113 |   Description   :  Return the index of the field in the field-array of
 114 |                    the form.
 115 |
 116 |   Return Values :  >= 0   : field index
 117 |                    -1     : fieldpointer invalid or field not connected
 118 +--------------------------------------------------------------------------*/
 119 int field_index(const FIELD * field)
 120 {
 121   return ( (field && field->form) ? field->index : -1 );
 122 }
 123
 124 /* fld_current.c ends here */