xref: /freebsd/contrib/ncurses/form/frm_page.c (revision 4d846d26)
1 /****************************************************************************
2  * Copyright 2020 Thomas E. Dickey                                          *
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29 
30 /****************************************************************************
31  *   Author:  Juergen Pfeifer, 1995,1997                                    *
32  ****************************************************************************/
33 
34 #include "form.priv.h"
35 
36 MODULE_ID("$Id: frm_page.c,v 1.14 2020/05/24 01:40:20 anonymous.maarten Exp $")
37 
38 /*---------------------------------------------------------------------------
39 |   Facility      :  libnform
40 |   Function      :  int set_form_page(FORM * form,int  page)
41 |
42 |   Description   :  Set the page number of the form.
43 |
44 |   Return Values :  E_OK              - success
45 |                    E_BAD_ARGUMENT    - invalid form pointer or page number
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 +--------------------------------------------------------------------------*/
50 FORM_EXPORT(int)
51 set_form_page(FORM *form, int page)
52 {
53   int err = E_OK;
54 
55   T((T_CALLED("set_form_page(%p,%d)"), (void *)form, page));
56 
57   if (!form || (page < 0) || (page >= form->maxpage))
58     RETURN(E_BAD_ARGUMENT);
59 
60   if (!(form->status & _POSTED))
61     {
62       form->curpage = (short)page;
63       form->current = _nc_First_Active_Field(form);
64     }
65   else
66     {
67       if (form->status & _IN_DRIVER)
68 	err = E_BAD_STATE;
69       else
70 	{
71 	  if (form->curpage != page)
72 	    {
73 	      if (!_nc_Internal_Validation(form))
74 		err = E_INVALID_FIELD;
75 	      else
76 		{
77 		  Call_Hook(form, fieldterm);
78 		  Call_Hook(form, formterm);
79 		  err = _nc_Set_Form_Page(form, page, (FIELD *)0);
80 		  Call_Hook(form, forminit);
81 		  Call_Hook(form, fieldinit);
82 		  _nc_Refresh_Current_Field(form);
83 		}
84 	    }
85 	}
86     }
87   RETURN(err);
88 }
89 
90 /*---------------------------------------------------------------------------
91 |   Facility      :  libnform
92 |   Function      :  int form_page(const FORM * form)
93 |
94 |   Description   :  Return the current page of the form.
95 |
96 |   Return Values :  >= 0  : current page number
97 |                    -1    : invalid form pointer
98 +--------------------------------------------------------------------------*/
99 FORM_EXPORT(int)
100 form_page(const FORM *form)
101 {
102   T((T_CALLED("form_page(%p)"), (const void *)form));
103 
104   returnCode(Normalize_Form(form)->curpage);
105 }
106 
107 /* frm_page.c ends here */
108