1 /**************************************************************************** 2 * Copyright 2020 Thomas E. Dickey * 3 * Copyright 1998-2010,2012 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_format * 36 * Set and get maximum numbers of rows and columns in menus * 37 ***************************************************************************/ 38 39 #include "menu.priv.h" 40 41 MODULE_ID("$Id: m_format.c,v 1.19 2020/02/02 23:34:34 tom Exp $") 42 43 #define minimum(a,b) ((a)<(b) ? (a): (b)) 44 45 /*--------------------------------------------------------------------------- 46 | Facility : libnmenu 47 | Function : int set_menu_format(MENU *menu, int rows, int cols) 48 | 49 | Description : Sets the maximum number of rows and columns of items 50 | that may be displayed at one time on a menu. If the 51 | menu contains more items than can be displayed at 52 | once, the menu will be scrollable. 53 | 54 | Return Values : E_OK - success 55 | E_BAD_ARGUMENT - invalid values passed 56 | E_NOT_CONNECTED - there are no items connected 57 | E_POSTED - the menu is already posted 58 +--------------------------------------------------------------------------*/ 59 NCURSES_EXPORT(int) 60 set_menu_format(MENU * menu, int rows, int cols) 61 { 62 int total_rows, total_cols; 63 64 T((T_CALLED("set_menu_format(%p,%d,%d)"), (void *)menu, rows, cols)); 65 66 if (rows < 0 || cols < 0) 67 RETURN(E_BAD_ARGUMENT); 68 69 if (menu) 70 { 71 if (menu->status & _POSTED) 72 RETURN(E_POSTED); 73 74 if (!(menu->items)) 75 RETURN(E_NOT_CONNECTED); 76 77 if (rows == 0) 78 rows = menu->frows; 79 if (cols == 0) 80 cols = menu->fcols; 81 82 if (menu->pattern) 83 Reset_Pattern(menu); 84 85 menu->frows = (short)rows; 86 menu->fcols = (short)cols; 87 88 assert(rows > 0 && cols > 0); 89 total_rows = (menu->nitems - 1) / cols + 1; 90 total_cols = (menu->opt & O_ROWMAJOR) ? 91 minimum(menu->nitems, cols) : 92 (menu->nitems - 1) / total_rows + 1; 93 94 menu->rows = (short)total_rows; 95 menu->cols = (short)total_cols; 96 menu->arows = (short)minimum(total_rows, rows); 97 menu->toprow = 0; 98 menu->curitem = *(menu->items); 99 assert(menu->curitem); 100 SetStatus(menu, _LINK_NEEDED); 101 _nc_Calculate_Item_Length_and_Width(menu); 102 } 103 else 104 { 105 if (rows > 0) 106 _nc_Default_Menu.frows = (short)rows; 107 if (cols > 0) 108 _nc_Default_Menu.fcols = (short)cols; 109 } 110 111 RETURN(E_OK); 112 } 113 114 /*--------------------------------------------------------------------------- 115 | Facility : libnmenu 116 | Function : void menu_format(const MENU *menu, int *rows, int *cols) 117 | 118 | Description : Returns the maximum number of rows and columns that may 119 | be displayed at one time on menu. 120 | 121 | Return Values : - 122 +--------------------------------------------------------------------------*/ 123 NCURSES_EXPORT(void) 124 menu_format(const MENU * menu, int *rows, int *cols) 125 { 126 if (rows) 127 *rows = Normalize_Menu(menu)->frows; 128 if (cols) 129 *cols = Normalize_Menu(menu)->fcols; 130 } 131 132 /* m_format.c ends here */ 133