1/* $OpenBSD: m_format.c,v 1.8 2023/10/17 09:52:10 nicm Exp $ */
2
3/****************************************************************************
4 * Copyright 2020,2021 Thomas E. Dickey                                     *
5 * Copyright 1998-2010,2012 Free Software Foundation, Inc.                  *
6 *                                                                          *
7 * Permission is hereby granted, free of charge, to any person obtaining a  *
8 * copy of this software and associated documentation files (the            *
9 * "Software"), to deal in the Software without restriction, including      *
10 * without limitation the rights to use, copy, modify, merge, publish,      *
11 * distribute, distribute with modifications, sublicense, and/or sell       *
12 * copies of the Software, and to permit persons to whom the Software is    *
13 * furnished to do so, subject to the following conditions:                 *
14 *                                                                          *
15 * The above copyright notice and this permission notice shall be included  *
16 * in all copies or substantial portions of the Software.                   *
17 *                                                                          *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
21 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
24 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
25 *                                                                          *
26 * Except as contained in this notice, the name(s) of the above copyright   *
27 * holders shall not be used in advertising or otherwise to promote the     *
28 * sale, use or other dealings in this Software without prior written       *
29 * authorization.                                                           *
30 ****************************************************************************/
31
32/****************************************************************************
33 *   Author:  Juergen Pfeifer, 1995,1997                                    *
34 ****************************************************************************/
35
36/***************************************************************************
37* Module m_format                                                          *
38* Set and get maximum numbers of rows and columns in menus                 *
39***************************************************************************/
40
41#include "menu.priv.h"
42
43MODULE_ID("$Id: m_format.c,v 1.8 2023/10/17 09:52:10 nicm Exp $")
44
45#define minimum(a,b) ((a)<(b) ? (a): (b))
46
47/*---------------------------------------------------------------------------
48|   Facility      :  libnmenu
49|   Function      :  int set_menu_format(MENU *menu, int rows, int cols)
50|
51|   Description   :  Sets the maximum number of rows and columns of items
52|                    that may be displayed at one time on a menu. If the
53|                    menu contains more items than can be displayed at
54|                    once, the menu will be scrollable.
55|
56|   Return Values :  E_OK                   - success
57|                    E_BAD_ARGUMENT         - invalid values passed
58|                    E_NOT_CONNECTED        - there are no items connected
59|                    E_POSTED               - the menu is already posted
60+--------------------------------------------------------------------------*/
61MENU_EXPORT(int)
62set_menu_format(MENU *menu, int rows, int cols)
63{
64
65  T((T_CALLED("set_menu_format(%p,%d,%d)"), (void *)menu, rows, cols));
66
67  if (rows < 0 || cols < 0)
68    RETURN(E_BAD_ARGUMENT);
69
70  if (menu)
71    {
72      int total_rows, total_cols;
73
74      if (menu->status & _POSTED)
75	RETURN(E_POSTED);
76
77      if (!(menu->items))
78	RETURN(E_NOT_CONNECTED);
79
80      if (rows == 0)
81	rows = menu->frows;
82      if (cols == 0)
83	cols = menu->fcols;
84
85      if (menu->pattern)
86	Reset_Pattern(menu);
87
88      menu->frows = (short)rows;
89      menu->fcols = (short)cols;
90
91      assert(rows > 0 && cols > 0);
92      total_rows = (menu->nitems - 1) / cols + 1;
93      total_cols = (menu->opt & O_ROWMAJOR) ?
94	minimum(menu->nitems, cols) :
95	(menu->nitems - 1) / total_rows + 1;
96
97      menu->rows = (short)total_rows;
98      menu->cols = (short)total_cols;
99      menu->arows = (short)minimum(total_rows, rows);
100      menu->toprow = 0;
101      menu->curitem = *(menu->items);
102      assert(menu->curitem);
103      SetStatus(menu, _LINK_NEEDED);
104      _nc_Calculate_Item_Length_and_Width(menu);
105    }
106  else
107    {
108      if (rows > 0)
109	_nc_Default_Menu.frows = (short)rows;
110      if (cols > 0)
111	_nc_Default_Menu.fcols = (short)cols;
112    }
113
114  RETURN(E_OK);
115}
116
117/*---------------------------------------------------------------------------
118|   Facility      :  libnmenu
119|   Function      :  void menu_format(const MENU *menu, int *rows, int *cols)
120|
121|   Description   :  Returns the maximum number of rows and columns that may
122|                    be displayed at one time on menu.
123|
124|   Return Values :  -
125+--------------------------------------------------------------------------*/
126MENU_EXPORT(void)
127menu_format(const MENU *menu, int *rows, int *cols)
128{
129  if (rows)
130    *rows = Normalize_Menu(menu)->frows;
131  if (cols)
132    *cols = Normalize_Menu(menu)->fcols;
133}
134
135/* m_format.c ends here */
136