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post.c revision 1.4 
      1 /*	$NetBSD: post.c,v 1.4 2001/01/18 05:42:23 blymn Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998-2000 Brett Lymn
      5  *                         (blymn (at) baea.com.au, brett_lymn (at) yahoo.com.au)
      6  * All rights reserved.
      7  *
      8  * This code has been donated to The NetBSD Foundation by the Author.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. The name of the author may not be used to endorse or promote products
     16  *    derived from this software withough specific prior written permission
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  *
     29  *
     30  */
     31 
     32 #include "form.h"
     33 #include "internals.h"
     34 
     35 /*
     36  * Post the form to the screen.
     37  */
     38 int
     39 post_form(FORM *form)
     40 {
     41 	int rows, cols, status;
     42 
     43 	if ((form == NULL) || (form->win == NULL))
     44 		return E_BAD_ARGUMENT;
     45 
     46 	if (form->posted == 1)
     47 		return E_POSTED;
     48 
     49 	if ((form->fields == NULL) || (form->fields[0] == NULL))
     50 		return E_NOT_CONNECTED;
     51 
     52 	if (form->in_init == 1)
     53 		return E_BAD_STATE;
     54 
     55 	if (scale_form(form, &rows, &cols) != E_OK)
     56 		return E_SYSTEM_ERROR;
     57 
     58 	if ((form->subwin != NULL) && ((rows > getmaxy(form->subwin))
     59 				       || (cols > getmaxx(form->subwin)))) {
     60 		return E_NO_ROOM;
     61 	}
     62 
     63 	if (form->subwin == NULL) {
     64 		form->subwin_created = 1;
     65 		form->subwin = derwin(form->win, rows, cols, 0, 0);
     66 		if (form->subwin == NULL)
     67 			return E_SYSTEM_ERROR;
     68 
     69 	}
     70 
     71 #ifdef DEBUG
     72 	if (_formi_create_dbg_file() != E_OK)
     73 		return E_SYSTEM_ERROR;
     74 #endif
     75 
     76 	form->in_init = 1;
     77 	if (form->form_init != NULL)
     78 		form->form_init(form);
     79 
     80 	if (form->field_init != NULL)
     81 		form->field_init(form);
     82 	form->in_init = 0;
     83 
     84 	_formi_pos_first_field(form);
     85 	if ((status = _formi_draw_page(form)) != E_OK)
     86 		return status;
     87 
     88 	form->posted = 1;
     89 	return E_OK;
     90 }
     91 
     92 /*
     93  * Unpost the form from the screen
     94  */
     95 int
     96 unpost_form(FORM *form)
     97 {
     98 
     99 	if (form == NULL)
    100 		return E_BAD_ARGUMENT;
    101 
    102 	if (form->posted != 1)
    103 		return E_NOT_POSTED;
    104 
    105 	if (form->in_init == 1)
    106 		return E_BAD_STATE;
    107 
    108 	form->in_init = 1;
    109 	if (form->field_term != NULL)
    110 		form->field_term(form);
    111 
    112 	if (form->form_term != NULL)
    113 		form->form_term(form);
    114 	form->in_init = 0;
    115 
    116 	wclear(form->subwin);
    117 	if (form->subwin_created == 1) {
    118 		delwin(form->subwin);
    119 		form->subwin_created = 0;
    120 	}
    121 
    122 	form->posted = 0;
    123 
    124 	return E_OK;
    125 }
    126 
    127