1/****************************************************************************
2 * Copyright 2020,2021 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
41MODULE_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+--------------------------------------------------------------------------*/
59MENU_EXPORT(int)
60set_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+--------------------------------------------------------------------------*/
124MENU_EXPORT(void)
125menu_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