1/****************************************************************************
2 * Copyright 2020 Thomas E. Dickey                                          *
3 * Copyright 1998-2010,2012 Free Software Foundation, Inc.                  *
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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 1.19 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+--------------------------------------------------------------------------*/
59NCURSES_EXPORT(int)
60set_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+--------------------------------------------------------------------------*/
123NCURSES_EXPORT(void)
124menu_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