3fdb57a09b8f4d99cdf1d20f1c77014b3a72cb56
[ncurses.git] / form / frm_post.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.                               *
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 <juergen.pfeifer@gmx.net> 1995,1997            *
31  ****************************************************************************/
32 #include "form.priv.h"
33
34 MODULE_ID("$Id: frm_post.c,v 1.4 1999/05/16 17:21:39 juergen Exp $")
35
36 /*---------------------------------------------------------------------------
37 |   Facility      :  libnform  
38 |   Function      :  int post_form(FORM * form)
39 |   
40 |   Description   :  Writes the form into its associated subwindow.
41 |
42 |   Return Values :  E_OK              - success
43 |                    E_BAD_ARGUMENT    - invalid form pointer
44 |                    E_POSTED          - form already posted
45 |                    E_NOT_CONNECTED   - no fields connected to form
46 |                    E_NO_ROOM         - form doesn't fit into subwindow
47 |                    E_SYSTEM_ERROR    - system error
48 +--------------------------------------------------------------------------*/
49 int post_form(FORM * form)
50 {
51   WINDOW *formwin;
52   int err;
53   int page;
54
55   if (!form)
56     RETURN(E_BAD_ARGUMENT);
57
58   if (form->status & _POSTED)   
59     RETURN(E_POSTED);
60
61   if (!(form->field))
62     RETURN(E_NOT_CONNECTED);
63   
64   formwin = Get_Form_Window(form);
65   if ((form->cols > getmaxx(formwin)) || (form->rows > getmaxy(formwin))) 
66     RETURN(E_NO_ROOM);
67
68   /* reset form->curpage to an invald value. This forces Set_Form_Page
69      to do the page initialization which is required by post_form.
70   */
71   page = form->curpage;
72   form->curpage = -1;
73   if ((err = _nc_Set_Form_Page(form,page,form->current))!=E_OK)
74     RETURN(err);
75
76   form->status |= _POSTED;
77
78   Call_Hook(form,forminit);
79   Call_Hook(form,fieldinit);
80
81   _nc_Refresh_Current_Field(form);
82   RETURN(E_OK);
83 }
84
85 /*---------------------------------------------------------------------------
86 |   Facility      :  libnform  
87 |   Function      :  int unpost_form(FORM * form)
88 |   
89 |   Description   :  Erase form from its associated subwindow.
90 |
91 |   Return Values :  E_OK            - success
92 |                    E_BAD_ARGUMENT  - invalid form pointer
93 |                    E_NOT_POSTED    - form isn't posted
94 |                    E_BAD_STATE     - called from a hook routine
95 +--------------------------------------------------------------------------*/
96 int unpost_form(FORM * form)
97 {
98   if (!form)
99     RETURN(E_BAD_ARGUMENT);
100
101   if (!(form->status & _POSTED)) 
102     RETURN(E_NOT_POSTED);
103
104   if (form->status & _IN_DRIVER) 
105     RETURN(E_BAD_STATE);
106
107   Call_Hook(form,fieldterm);
108   Call_Hook(form,formterm);
109
110   werase(Get_Form_Window(form));
111   delwin(form->w);
112   form->w = (WINDOW *)0;
113   form->status &= ~_POSTED;
114   RETURN(E_OK);
115 }
116
117 /* frm_post.c ends here */