1 /**************************************************************************** 2 * Copyright 2020 Thomas E. Dickey * 3 * Copyright 1998-2004,2010 Free Software Foundation, Inc. * 4 * * 5 * Permission is hereby granted, free of charge, to any person obtaining a * 6 * copy of this software and associated documentation files (the * 7 * "Software"), to deal in the Software without restriction, including * 8 * without limitation the rights to use, copy, modify, merge, publish, * 9 * distribute, distribute with modifications, sublicense, and/or sell * 10 * copies of the Software, and to permit persons to whom the Software is * 11 * furnished to do so, subject to the following conditions: * 12 * * 13 * The above copyright notice and this permission notice shall be included * 14 * in all copies or substantial portions of the Software. * 15 * * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 23 * * 24 * Except as contained in this notice, the name(s) of the above copyright * 25 * holders shall not be used in advertising or otherwise to promote the * 26 * sale, use or other dealings in this Software without prior written * 27 * authorization. * 28 ****************************************************************************/ 29 30 /**************************************************************************** 31 * Author: Juergen Pfeifer, 1995,1997 * 32 ****************************************************************************/ 33 34 /*************************************************************************** 35 * Module m_item_vis * 36 * Tell if menu item is visible * 37 ***************************************************************************/ 38 39 #include "menu.priv.h" 40 41 MODULE_ID("$Id: m_item_vis.c,v 1.17 2020/02/02 23:34:34 tom Exp $") 42 43 /*--------------------------------------------------------------------------- 44 | Facility : libnmenu 45 | Function : bool item_visible(const ITEM *item) 46 | 47 | Description : A item is visible if it currently appears in the 48 | subwindow of a posted menu. 49 | 50 | Return Values : TRUE if visible 51 | FALSE if invisible 52 +--------------------------------------------------------------------------*/ 53 NCURSES_EXPORT(bool) 54 item_visible(const ITEM * item) 55 { 56 MENU *menu; 57 58 T((T_CALLED("item_visible(%p)"), (const void *)item)); 59 if (item && 60 (menu = item->imenu) && 61 (menu->status & _POSTED) && 62 ((menu->toprow + menu->arows) > (item->y)) && 63 (item->y >= menu->toprow)) 64 returnBool(TRUE); 65 else 66 returnBool(FALSE); 67 } 68 69 /* m_item_vis.c ends here */ 70