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_top * 36 * Set and get top menus item * 37 ***************************************************************************/ 38 39 #include "menu.priv.h" 40 41 MODULE_ID("$Id: m_item_top.c,v 1.12 2020/02/02 23:34:34 tom Exp $") 42 43 /*--------------------------------------------------------------------------- 44 | Facility : libnmenu 45 | Function : int set_top_row(MENU *menu, int row) 46 | 47 | Description : Makes the specified row the top row in the menu 48 | 49 | Return Values : E_OK - success 50 | E_BAD_ARGUMENT - not a menu pointer or invalid row 51 | E_NOT_CONNECTED - there are no items for the menu 52 +--------------------------------------------------------------------------*/ 53 NCURSES_EXPORT(int) 54 set_top_row(MENU * menu, int row) 55 { 56 ITEM *item; 57 58 T((T_CALLED("set_top_row(%p,%d)"), (void *)menu, row)); 59 60 if (menu) 61 { 62 if (menu->status & _IN_DRIVER) 63 RETURN(E_BAD_STATE); 64 if (menu->items == (ITEM **) 0) 65 RETURN(E_NOT_CONNECTED); 66 67 if ((row < 0) || (row > (menu->rows - menu->arows))) 68 RETURN(E_BAD_ARGUMENT); 69 } 70 else 71 RETURN(E_BAD_ARGUMENT); 72 73 if (row != menu->toprow) 74 { 75 if (menu->status & _LINK_NEEDED) 76 _nc_Link_Items(menu); 77 78 item = menu->items[(menu->opt & O_ROWMAJOR) ? (row * menu->cols) : row]; 79 assert(menu->pattern); 80 Reset_Pattern(menu); 81 _nc_New_TopRow_and_CurrentItem(menu, row, item); 82 } 83 84 RETURN(E_OK); 85 } 86 87 /*--------------------------------------------------------------------------- 88 | Facility : libnmenu 89 | Function : int top_row(const MENU *) 90 | 91 | Description : Return the top row of the menu 92 | 93 | Return Values : The row number or ERR if there is no row 94 +--------------------------------------------------------------------------*/ 95 NCURSES_EXPORT(int) 96 top_row(const MENU * menu) 97 { 98 T((T_CALLED("top_row(%p)"), (const void *)menu)); 99 if (menu && menu->items && *(menu->items)) 100 { 101 assert((menu->toprow >= 0) && (menu->toprow < menu->rows)); 102 returnCode(menu->toprow); 103 } 104 else 105 returnCode(ERR); 106 } 107 108 /* m_item_top.c ends here */ 109