/* $OpenBSD: m_item_new.c,v 1.7 2001/01/22 18:02:04 millert Exp $ */ /**************************************************************************** * 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 * ****************************************************************************/ /*************************************************************************** * 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 1.12 2000/12/10 02:16:48 tom 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 */