ncurses 5.3
[ncurses.git] / form / frm_post.c
1 /****************************************************************************
2  * Copyright (c) 1998,2000 Free Software Foundation, Inc.                   *
3  *                                                                          *
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6  * "Software"), to deal in the Software without restriction, including      *
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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  *
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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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25  * sale, use or other dealings in this Software without prior written       *
26  * authorization.                                                           *
27  ****************************************************************************/
28
29 /****************************************************************************
30  *   Author:  Juergen Pfeifer, 1995,1997                                    *
31  *   Contact: http://www.familiepfeifer.de/Contact.aspx?Lang=en             *
32  ****************************************************************************/
33 #include "form.priv.h"
34
35 MODULE_ID("$Id: frm_post.c,v 1.6 2002/07/06 15:33:27 juergen Exp $")
36
37 /*---------------------------------------------------------------------------
38 |   Facility      :  libnform  
39 |   Function      :  int post_form(FORM * form)
40 |   
41 |   Description   :  Writes the form into its associated subwindow.
42 |
43 |   Return Values :  E_OK              - success
44 |                    E_BAD_ARGUMENT    - invalid form pointer
45 |                    E_POSTED          - form already posted
46 |                    E_NOT_CONNECTED   - no fields connected to form
47 |                    E_NO_ROOM         - form doesn't fit into subwindow
48 |                    E_SYSTEM_ERROR    - system error
49 +--------------------------------------------------------------------------*/
50 NCURSES_EXPORT(int)
51 post_form (FORM * form)
52 {
53   WINDOW *formwin;
54   int err;
55   int page;
56
57   if (!form)
58     RETURN(E_BAD_ARGUMENT);
59
60   if (form->status & _POSTED)   
61     RETURN(E_POSTED);
62
63   if (!(form->field))
64     RETURN(E_NOT_CONNECTED);
65   
66   formwin = Get_Form_Window(form);
67   if ((form->cols > getmaxx(formwin)) || (form->rows > getmaxy(formwin))) 
68     RETURN(E_NO_ROOM);
69
70   /* reset form->curpage to an invald value. This forces Set_Form_Page
71      to do the page initialization which is required by post_form.
72   */
73   page = form->curpage;
74   form->curpage = -1;
75   if ((err = _nc_Set_Form_Page(form,page,form->current))!=E_OK)
76     RETURN(err);
77
78   form->status |= _POSTED;
79
80   Call_Hook(form,forminit);
81   Call_Hook(form,fieldinit);
82
83   _nc_Refresh_Current_Field(form);
84   RETURN(E_OK);
85 }
86
87 /*---------------------------------------------------------------------------
88 |   Facility      :  libnform  
89 |   Function      :  int unpost_form(FORM * form)
90 |   
91 |   Description   :  Erase form from its associated subwindow.
92 |
93 |   Return Values :  E_OK            - success
94 |                    E_BAD_ARGUMENT  - invalid form pointer
95 |                    E_NOT_POSTED    - form isn't posted
96 |                    E_BAD_STATE     - called from a hook routine
97 +--------------------------------------------------------------------------*/
98 NCURSES_EXPORT(int)
99 unpost_form (FORM * form)
100 {
101   if (!form)
102     RETURN(E_BAD_ARGUMENT);
103
104   if (!(form->status & _POSTED)) 
105     RETURN(E_NOT_POSTED);
106
107   if (form->status & _IN_DRIVER) 
108     RETURN(E_BAD_STATE);
109
110   Call_Hook(form,fieldterm);
111   Call_Hook(form,formterm);
112
113   werase(Get_Form_Window(form));
114   delwin(form->w);
115   form->w = (WINDOW *)0;
116   form->status &= ~_POSTED;
117   RETURN(E_OK);
118 }
119
120 /* frm_post.c ends here */