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|
/* $OpenBSD: m_item_new.c,v 1.6 1999/05/17 03:04:24 millert Exp $ */
/****************************************************************************
* Copyright (c) 1998 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 <juergen.pfeifer@gmx.net> 1995,1997 *
****************************************************************************/
/***************************************************************************
* Module m_item_new *
* Create and destroy menu items *
* Set and get marker string for menu *
***************************************************************************/
#include "menu.priv.h"
MODULE_ID("$From: m_item_new.c,v 1.11 1999/05/16 17:28:49 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);
if (menu != &_nc_Default_Menu)
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 */
|
