1 /****************************************************************************
2 * Copyright 2020,2021 Thomas E. Dickey *
3 * Copyright 1998-2010,2012 Free Software Foundation, Inc. *
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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 1.22 2021/03/27 23:46:29 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 +--------------------------------------------------------------------------*/
MENU_EXPORT(int)59 MENU_EXPORT(int)
60 set_menu_format(MENU *menu, int rows, int cols)
61 {
62
63 T((T_CALLED("set_menu_format(%p,%d,%d)"), (void *)menu, rows, cols));
64
65 if (rows < 0 || cols < 0)
66 RETURN(E_BAD_ARGUMENT);
67
68 if (menu)
69 {
70 int total_rows, total_cols;
71
72 if (menu->status & _POSTED)
73 RETURN(E_POSTED);
74
75 if (!(menu->items))
76 RETURN(E_NOT_CONNECTED);
77
78 if (rows == 0)
79 rows = menu->frows;
80 if (cols == 0)
81 cols = menu->fcols;
82
83 if (menu->pattern)
84 Reset_Pattern(menu);
85
86 menu->frows = (short)rows;
87 menu->fcols = (short)cols;
88
89 assert(rows > 0 && cols > 0);
90 total_rows = (menu->nitems - 1) / cols + 1;
91 total_cols = (menu->opt & O_ROWMAJOR) ?
92 minimum(menu->nitems, cols) :
93 (menu->nitems - 1) / total_rows + 1;
94
95 menu->rows = (short)total_rows;
96 menu->cols = (short)total_cols;
97 menu->arows = (short)minimum(total_rows, rows);
98 menu->toprow = 0;
99 menu->curitem = *(menu->items);
100 assert(menu->curitem);
101 SetStatus(menu, _LINK_NEEDED);
102 _nc_Calculate_Item_Length_and_Width(menu);
103 }
104 else
105 {
106 if (rows > 0)
107 _nc_Default_Menu.frows = (short)rows;
108 if (cols > 0)
109 _nc_Default_Menu.fcols = (short)cols;
110 }
111
112 RETURN(E_OK);
113 }
114
115 /*---------------------------------------------------------------------------
116 | Facility : libnmenu
117 | Function : void menu_format(const MENU *menu, int *rows, int *cols)
118 |
119 | Description : Returns the maximum number of rows and columns that may
120 | be displayed at one time on menu.
121 |
122 | Return Values : -
123 +--------------------------------------------------------------------------*/
124 MENU_EXPORT(void)
menu_format(const MENU * menu,int * rows,int * cols)125 menu_format(const MENU *menu, int *rows, int *cols)
126 {
127 if (rows)
128 *rows = Normalize_Menu(menu)->frows;
129 if (cols)
130 *cols = Normalize_Menu(menu)->fcols;
131 }
132
133 /* m_format.c ends here */
134