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- /****************************************************************************
- * Copyright (c) 1998,2000 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 *
- * Contact: http://www.familiepfeifer.de/Contact.aspx?Lang=en *
- ****************************************************************************/
-
- /***************************************************************************
- * 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 1.13 2002/07/06 15:22:16 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.
- +--------------------------------------------------------------------------*/
- NCURSES_EXPORT(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
- +--------------------------------------------------------------------------*/
- NCURSES_EXPORT(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
- +--------------------------------------------------------------------------*/
- NCURSES_EXPORT(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
- +--------------------------------------------------------------------------*/
- NCURSES_EXPORT(const char *)
- menu_mark (const MENU * menu)
- {
- return Normalize_Menu( menu )->mark;
- }
-
- /* m_item_new.c */
-