| Current Path : /usr/src/contrib/ncurses/form/ |
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| Current File : //usr/src/contrib/ncurses/form/frm_def.c |
/****************************************************************************
* Copyright (c) 1998-2007,2008 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/****************************************************************************
* Author: Juergen Pfeifer, 1995,1997 *
****************************************************************************/
#include "form.priv.h"
MODULE_ID("$Id: frm_def.c,v 1.23 2008/08/04 00:07:55 tom Exp $")
/* this can't be readonly */
static FORM default_form =
{
0, /* status */
0, /* rows */
0, /* cols */
0, /* currow */
0, /* curcol */
0, /* toprow */
0, /* begincol */
-1, /* maxfield */
-1, /* maxpage */
-1, /* curpage */
ALL_FORM_OPTS, /* opts */
(WINDOW *)0, /* win */
(WINDOW *)0, /* sub */
(WINDOW *)0, /* w */
(FIELD **)0, /* field */
(FIELD *)0, /* current */
(_PAGE *) 0, /* page */
(char *)0, /* usrptr */
NULL, /* forminit */
NULL, /* formterm */
NULL, /* fieldinit */
NULL /* fieldterm */
};
NCURSES_EXPORT_VAR(FORM *) _nc_Default_Form = &default_form;
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static FIELD *Insert_Field_By_Position(
| FIELD *new_field,
| FIELD *head )
|
| Description : Insert new_field into sorted fieldlist with head "head"
| and return new head of sorted fieldlist. Sorting
| criteria is (row,column). This is a circular list.
|
| Return Values : New head of sorted fieldlist
+--------------------------------------------------------------------------*/
static FIELD *
Insert_Field_By_Position(FIELD *newfield, FIELD *head)
{
FIELD *current, *newhead;
assert(newfield);
if (!head)
{ /* empty list is trivial */
newhead = newfield->snext = newfield->sprev = newfield;
}
else
{
newhead = current = head;
while ((current->frow < newfield->frow) ||
((current->frow == newfield->frow) &&
(current->fcol < newfield->fcol)))
{
current = current->snext;
if (current == head)
{ /* We cycled through. Reset head to indicate that */
head = (FIELD *)0;
break;
}
}
/* we leave the loop with current pointing to the field after newfield */
newfield->snext = current;
newfield->sprev = current->sprev;
newfield->snext->sprev = newfield;
newfield->sprev->snext = newfield;
if (current == head)
newhead = newfield;
}
return (newhead);
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static void Disconnect_Fields(FORM *form)
|
| Description : Break association between form and array of fields.
|
| Return Values : -
+--------------------------------------------------------------------------*/
static void
Disconnect_Fields(FORM *form)
{
if (form->field)
{
FIELD **fields;
for (fields = form->field; *fields; fields++)
{
if (form == (*fields)->form)
(*fields)->form = (FORM *)0;
}
form->rows = form->cols = 0;
form->maxfield = form->maxpage = -1;
form->field = (FIELD **)0;
if (form->page)
free(form->page);
form->page = (_PAGE *) 0;
}
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static int Connect_Fields(FORM *form, FIELD **fields)
|
| Description : Set association between form and array of fields.
|
| Return Values : E_OK - no error
| E_CONNECTED - a field is already connected
| E_BAD_ARGUMENT - Invalid form pointer or field array
| E_SYSTEM_ERROR - not enough memory
+--------------------------------------------------------------------------*/
static int
Connect_Fields(FORM *form, FIELD **fields)
{
int field_cnt, j;
int page_nr;
int maximum_row_in_field, maximum_col_in_field;
_PAGE *pg;
T((T_CALLED("Connect_Fields(%p,%p)"), form, fields));
assert(form);
form->field = fields;
form->maxfield = 0;
form->maxpage = 0;
if (!fields)
RETURN(E_OK);
page_nr = 0;
/* store formpointer in fields and count pages */
for (field_cnt = 0; fields[field_cnt]; field_cnt++)
{
if (fields[field_cnt]->form)
RETURN(E_CONNECTED);
if (field_cnt == 0 ||
(fields[field_cnt]->status & _NEWPAGE))
page_nr++;
fields[field_cnt]->form = form;
}
if (field_cnt == 0 || (short)field_cnt < 0)
RETURN(E_BAD_ARGUMENT);
/* allocate page structures */
if ((pg = typeMalloc(_PAGE, page_nr)) != (_PAGE *) 0)
{
T((T_CREATE("_PAGE %p"), pg));
form->page = pg;
}
else
RETURN(E_SYSTEM_ERROR);
/* Cycle through fields and calculate page boundaries as well as
size of the form */
for (j = 0; j < field_cnt; j++)
{
if (j == 0)
pg->pmin = j;
else
{
if (fields[j]->status & _NEWPAGE)
{
pg->pmax = j - 1;
pg++;
pg->pmin = j;
}
}
maximum_row_in_field = fields[j]->frow + fields[j]->rows;
maximum_col_in_field = fields[j]->fcol + fields[j]->cols;
if (form->rows < maximum_row_in_field)
form->rows = maximum_row_in_field;
if (form->cols < maximum_col_in_field)
form->cols = maximum_col_in_field;
}
pg->pmax = field_cnt - 1;
form->maxfield = field_cnt;
form->maxpage = page_nr;
/* Sort fields on form pages */
for (page_nr = 0; page_nr < form->maxpage; page_nr++)
{
FIELD *fld = (FIELD *)0;
for (j = form->page[page_nr].pmin; j <= form->page[page_nr].pmax; j++)
{
fields[j]->index = j;
fields[j]->page = page_nr;
fld = Insert_Field_By_Position(fields[j], fld);
}
if (fld)
{
form->page[page_nr].smin = fld->index;
form->page[page_nr].smax = fld->sprev->index;
}
else
{
form->page[page_nr].smin = 0;
form->page[page_nr].smax = 0;
}
}
RETURN(E_OK);
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static int Associate_Fields(FORM *form, FIELD **fields)
|
| Description : Set association between form and array of fields.
| If there are fields, position to first active field.
|
| Return Values : E_OK - success
| E_BAD_ARGUMENT - Invalid form pointer or field array
| E_CONNECTED - a field is already connected
| E_SYSTEM_ERROR - not enough memory
+--------------------------------------------------------------------------*/
NCURSES_INLINE static int
Associate_Fields(FORM *form, FIELD **fields)
{
int res = Connect_Fields(form, fields);
if (res == E_OK)
{
if (form->maxpage > 0)
{
form->curpage = 0;
form_driver(form, FIRST_ACTIVE_MAGIC);
}
else
{
form->curpage = -1;
form->current = (FIELD *)0;
}
}
return (res);
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : FORM *new_form( FIELD **fields )
|
| Description : Create new form with given array of fields.
|
| Return Values : Pointer to form. NULL if error occurred.
! Set errno:
| E_OK - success
| E_BAD_ARGUMENT - Invalid form pointer or field array
| E_CONNECTED - a field is already connected
| E_SYSTEM_ERROR - not enough memory
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(FORM *)
new_form(FIELD **fields)
{
int err = E_SYSTEM_ERROR;
FORM *form = typeMalloc(FORM, 1);
T((T_CALLED("new_form(%p)"), fields));
if (form)
{
T((T_CREATE("form %p"), form));
*form = *_nc_Default_Form;
if ((err = Associate_Fields(form, fields)) != E_OK)
{
free_form(form);
form = (FORM *)0;
}
}
if (!form)
SET_ERROR(err);
returnForm(form);
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : int free_form( FORM *form )
|
| Description : Release internal memory associated with form.
|
| Return Values : E_OK - no error
| E_BAD_ARGUMENT - invalid form pointer
| E_POSTED - form is posted
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(int)
free_form(FORM *form)
{
T((T_CALLED("free_form(%p)"), form));
if (!form)
RETURN(E_BAD_ARGUMENT);
if (form->status & _POSTED)
RETURN(E_POSTED);
Disconnect_Fields(form);
if (form->page)
free(form->page);
free(form);
RETURN(E_OK);
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : int set_form_fields( FORM *form, FIELD **fields )
|
| Description : Set a new association of an array of fields to a form
|
| Return Values : E_OK - no error
| E_BAD_ARGUMENT - Invalid form pointer or field array
| E_CONNECTED - a field is already connected
| E_POSTED - form is posted
| E_SYSTEM_ERROR - not enough memory
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(int)
set_form_fields(FORM *form, FIELD **fields)
{
FIELD **old;
int res;
T((T_CALLED("set_form_fields(%p,%p)"), form, fields));
if (!form)
RETURN(E_BAD_ARGUMENT);
if (form->status & _POSTED)
RETURN(E_POSTED);
old = form->field;
Disconnect_Fields(form);
if ((res = Associate_Fields(form, fields)) != E_OK)
Connect_Fields(form, old);
RETURN(res);
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : FIELD **form_fields( const FORM *form )
|
| Description : Retrieve array of fields
|
| Return Values : Pointer to field array
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(FIELD **)
form_fields(const FORM *form)
{
T((T_CALLED("form_field(%p)"), form));
returnFieldPtr(Normalize_Form(form)->field);
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : int field_count( const FORM *form )
|
| Description : Retrieve number of fields
|
| Return Values : Number of fields, -1 if none are defined
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(int)
field_count(const FORM *form)
{
T((T_CALLED("field_count(%p)"), form));
returnCode(Normalize_Form(form)->maxfield);
}
/* frm_def.c ends here */