232 lines
8.0 KiB
C
232 lines
8.0 KiB
C
/****************************************************************************
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* Copyright (c) 1998,2000 Free Software Foundation, Inc. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the *
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* "Software"), to deal in the Software without restriction, including *
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* without limitation the rights to use, copy, modify, merge, publish, *
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* distribute, distribute with modifications, sublicense, and/or sell *
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* copies of the Software, and to permit persons to whom the Software is *
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* furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included *
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* in all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Except as contained in this notice, the name(s) of the above copyright *
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* holders shall not be used in advertising or otherwise to promote the *
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* sale, use or other dealings in this Software without prior written *
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* authorization. *
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****************************************************************************/
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/****************************************************************************
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* Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997 *
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****************************************************************************/
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/***************************************************************************
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* Module m_item_new *
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* Create and destroy menu items *
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* Set and get marker string for menu *
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***************************************************************************/
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#include "menu.priv.h"
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MODULE_ID("$Id: m_item_new.c,v 1.12 2000/12/10 02:16:48 tom Exp $")
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/*---------------------------------------------------------------------------
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| Facility : libnmenu
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| Function : bool Is_Printable_String(const char *s)
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| Description : Checks whether or not the string contains only printable
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| characters.
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| Return Values : TRUE - if string is printable
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| FALSE - if string contains non-printable characters
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+--------------------------------------------------------------------------*/
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static bool Is_Printable_String(const char *s)
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{
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assert(s);
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while(*s)
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{
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if (!isprint((unsigned char)*s))
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return FALSE;
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s++;
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}
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return TRUE;
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}
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/*---------------------------------------------------------------------------
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| Facility : libnmenu
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| Function : ITEM *new_item(char *name, char *description)
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| Description : Create a new item with name and description. Return
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| a pointer to this new item.
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| N.B.: an item must(!) have a name.
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| Return Values : The item pointer or NULL if creation failed.
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+--------------------------------------------------------------------------*/
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NCURSES_EXPORT(ITEM *)
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new_item (const char *name, const char *description)
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{
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ITEM *item;
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if ( !name || (*name == '\0') || !Is_Printable_String(name) )
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{
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item = (ITEM *)0;
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SET_ERROR( E_BAD_ARGUMENT );
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}
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else
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{
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item = (ITEM *)calloc(1,sizeof(ITEM));
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if (item)
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{
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*item = _nc_Default_Item; /* hope we have struct assignment */
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item->name.length = strlen(name);
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item->name.str = name;
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if (description && (*description != '\0') &&
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Is_Printable_String(description))
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{
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item->description.length = strlen(description);
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item->description.str = description;
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}
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else
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{
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item->description.length = 0;
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item->description.str = (char *)0;
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}
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}
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else
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SET_ERROR( E_SYSTEM_ERROR );
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}
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return(item);
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}
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/*---------------------------------------------------------------------------
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| Facility : libnmenu
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| Function : int free_item(ITEM *item)
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| Description : Free the allocated storage for this item.
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| N.B.: a connected item can't be freed.
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| Return Values : E_OK - success
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| E_BAD_ARGUMENT - invalid value has been passed
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| E_CONNECTED - item is still connected to a menu
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+--------------------------------------------------------------------------*/
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NCURSES_EXPORT(int)
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free_item (ITEM * item)
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{
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if (!item)
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RETURN( E_BAD_ARGUMENT );
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if (item->imenu)
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RETURN( E_CONNECTED );
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free(item);
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RETURN( E_OK );
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}
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/*---------------------------------------------------------------------------
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| Facility : libnmenu
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| Function : int set_menu_mark( MENU *menu, const char *mark )
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| Description : Set the mark string used to indicate the current
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| item (single-valued menu) or the selected items
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| (multi-valued menu).
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| The mark argument may be NULL, in which case no
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| marker is used.
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| This might be a little bit tricky, because this may
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| affect the geometry of the menu, which we don't allow
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| if it is already posted.
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| Return Values : E_OK - success
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| E_BAD_ARGUMENT - an invalid value has been passed
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| E_SYSTEM_ERROR - no memory to store mark
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+--------------------------------------------------------------------------*/
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NCURSES_EXPORT(int)
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set_menu_mark (MENU * menu, const char * mark)
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{
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int l;
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if ( mark && (*mark != '\0') && Is_Printable_String(mark) )
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l = strlen(mark);
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else
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l = 0;
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if ( menu )
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{
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char *old_mark = menu->mark;
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unsigned short old_status = menu->status;
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if (menu->status & _POSTED)
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{
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/* If the menu is already posted, the geometry is fixed. Then
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we can only accept a mark with exactly the same length */
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if (menu->marklen != l)
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RETURN(E_BAD_ARGUMENT);
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}
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menu->marklen = l;
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if (l)
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{
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menu->mark = (char *)malloc(l+1);
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if (menu->mark)
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{
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strcpy(menu->mark, mark);
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if (menu != &_nc_Default_Menu)
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menu->status |= _MARK_ALLOCATED;
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}
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else
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{
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menu->mark = old_mark;
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RETURN(E_SYSTEM_ERROR);
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}
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}
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else
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menu->mark = (char *)0;
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if ((old_status & _MARK_ALLOCATED) && old_mark)
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free(old_mark);
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if (menu->status & _POSTED)
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{
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_nc_Draw_Menu( menu );
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_nc_Show_Menu( menu );
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}
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else
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{
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/* Recalculate the geometry */
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_nc_Calculate_Item_Length_and_Width( menu );
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}
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}
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else
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{
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return set_menu_mark(&_nc_Default_Menu, mark);
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}
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RETURN(E_OK);
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}
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/*---------------------------------------------------------------------------
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| Facility : libnmenu
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| Function : char *menu_mark(const MENU *menu)
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| Description : Return a pointer to the marker string
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| Return Values : The marker string pointer or NULL if no marker defined
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+--------------------------------------------------------------------------*/
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NCURSES_EXPORT(const char *)
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menu_mark (const MENU * menu)
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{
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return Normalize_Menu( menu )->mark;
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}
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/* m_item_new.c */
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