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|
/* $OpenBSD: m_item_new.c,v 1.3 1997/12/03 05:31:20 millert Exp $ */
/*-----------------------------------------------------------------------------+
| The ncurses menu library is Copyright (C) 1995-1997 |
| by Juergen Pfeifer <Juergen.Pfeifer@T-Online.de> |
| All Rights Reserved. |
| |
| Permission to use, copy, modify, and distribute this software and its |
| documentation for any purpose and without fee is hereby granted, provided |
| that the above copyright notice appear in all copies and that both that |
| copyright notice and this permission notice appear in supporting |
| documentation, and that the name of the above listed copyright holder(s) not |
| be used in advertising or publicity pertaining to distribution of the |
| software without specific, written prior permission. |
| |
| THE ABOVE LISTED COPYRIGHT HOLDER(S) DISCLAIM ALL WARRANTIES WITH REGARD TO |
| THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT- |
| NESS, IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR |
| ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RE- |
| SULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, |
| NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH |
| THE USE OR PERFORMANCE OF THIS SOFTWARE. |
+-----------------------------------------------------------------------------*/
/***************************************************************************
* Module m_item_new *
* Create and destroy menu items *
* Set and get marker string for menu *
***************************************************************************/
#include "menu.priv.h"
MODULE_ID("Id: m_item_new.c,v 1.7 1997/10/21 08:44:31 juergen Exp $")
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : bool Is_Printable_String(const char *s)
|
| Description : Checks whether or not the string contains only printable
| characters.
|
| Return Values : TRUE - if string is printable
| FALSE - if string contains non-printable characters
+--------------------------------------------------------------------------*/
static bool Is_Printable_String(const char *s)
{
assert(s);
while(*s)
{
if (!isprint((unsigned char)*s))
return FALSE;
s++;
}
return TRUE;
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : ITEM *new_item(char *name, char *description)
|
| Description : Create a new item with name and description. Return
| a pointer to this new item.
| N.B.: an item must(!) have a name.
|
| Return Values : The item pointer or NULL if creation failed.
+--------------------------------------------------------------------------*/
ITEM *new_item(const char *name, const char *description)
{
ITEM *item;
if ( !name || (*name == '\0') || !Is_Printable_String(name) )
{
item = (ITEM *)0;
SET_ERROR( E_BAD_ARGUMENT );
}
else
{
item = (ITEM *)calloc(1,sizeof(ITEM));
if (item)
{
*item = _nc_Default_Item; /* hope we have struct assignment */
item->name.length = strlen(name);
item->name.str = name;
if (description && (*description != '\0') &&
Is_Printable_String(description))
{
item->description.length = strlen(description);
item->description.str = description;
}
else
{
item->description.length = 0;
item->description.str = (char *)0;
}
}
else
SET_ERROR( E_SYSTEM_ERROR );
}
return(item);
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : int free_item(ITEM *item)
|
| Description : Free the allocated storage for this item.
| N.B.: a connected item can't be freed.
|
| Return Values : E_OK - success
| E_BAD_ARGUMENT - invalid value has been passed
| E_CONNECTED - item is still connected to a menu
+--------------------------------------------------------------------------*/
int free_item(ITEM * item)
{
if (!item)
RETURN( E_BAD_ARGUMENT );
if (item->imenu)
RETURN( E_CONNECTED );
free(item);
RETURN( E_OK );
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : int set_menu_mark( MENU *menu, const char *mark )
|
| Description : Set the mark string used to indicate the current
| item (single-valued menu) or the selected items
| (multi-valued menu).
| The mark argument may be NULL, in which case no
| marker is used.
| This might be a little bit tricky, because this may
| affect the geometry of the menu, which we don't allow
| if it is already posted.
|
| Return Values : E_OK - success
| E_BAD_ARGUMENT - an invalid value has been passed
| E_SYSTEM_ERROR - no memory to store mark
+--------------------------------------------------------------------------*/
int set_menu_mark(MENU * menu, const char * mark)
{
int l;
if ( mark && (*mark != '\0') && Is_Printable_String(mark) )
l = strlen(mark);
else
l = 0;
if ( menu )
{
char *old_mark = menu->mark;
unsigned short old_status = menu->status;
if (menu->status & _POSTED)
{
/* If the menu is already posted, the geometry is fixed. Then
we can only accept a mark with exactly the same length */
if (menu->marklen != l)
RETURN(E_BAD_ARGUMENT);
}
menu->marklen = l;
if (l)
{
menu->mark = (char *)malloc(l+1);
if (menu->mark)
{
strcpy(menu->mark, mark);
menu->status |= _MARK_ALLOCATED;
}
else
{
menu->mark = old_mark;
RETURN(E_SYSTEM_ERROR);
}
}
else
menu->mark = (char *)0;
if ((old_status & _MARK_ALLOCATED) && old_mark)
free(old_mark);
if (menu->status & _POSTED)
{
_nc_Draw_Menu( menu );
_nc_Show_Menu( menu );
}
else
{
/* Recalculate the geometry */
_nc_Calculate_Item_Length_and_Width( menu );
}
}
else
{
return set_menu_mark(&_nc_Default_Menu, mark);
}
RETURN(E_OK);
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : char *menu_mark(const MENU *menu)
|
| Description : Return a pointer to the marker string
|
| Return Values : The marker string pointer or NULL if no marker defined
+--------------------------------------------------------------------------*/
const char *menu_mark(const MENU * menu)
{
return Normalize_Menu( menu )->mark;
}
/* m_item_new.c */
|
