1/****************************************************************************
2 * Copyright 2020 Thomas E. Dickey                                          *
3 * Copyright 1998-2004,2010 Free Software Foundation, Inc.                  *
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29
30/****************************************************************************
31 *   Author:  Juergen Pfeifer, 1995,1997                                    *
32 ****************************************************************************/
33
34/***************************************************************************
35* Module m_opts                                                            *
36* Menus option routines                                                    *
37***************************************************************************/
38
39#include "menu.priv.h"
40
41MODULE_ID("$Id: m_opts.c,v 1.21 2020/02/02 23:34:34 tom Exp $")
42
43/*---------------------------------------------------------------------------
44|   Facility      :  libnmenu
45|   Function      :  int set_menu_opts(MENU *menu, Menu_Options opts)
46|
47|   Description   :  Set the options for this menu. If the new settings
48|                    end up in a change of the geometry of the menu, it
49|                    will be recalculated. This operation is forbidden if
50|                    the menu is already posted.
51|
52|   Return Values :  E_OK           - success
53|                    E_BAD_ARGUMENT - invalid menu options
54|                    E_POSTED       - menu is already posted
55+--------------------------------------------------------------------------*/
56NCURSES_EXPORT(int)
57set_menu_opts(MENU * menu, Menu_Options opts)
58{
59  T((T_CALLED("set_menu_opts(%p,%d)"), (void *)menu, opts));
60
61  opts &= ALL_MENU_OPTS;
62
63  if (opts & ~ALL_MENU_OPTS)
64    RETURN(E_BAD_ARGUMENT);
65
66  if (menu)
67    {
68      if (menu->status & _POSTED)
69	RETURN(E_POSTED);
70
71      if ((opts & O_ROWMAJOR) != (menu->opt & O_ROWMAJOR))
72	{
73	  /* we need this only if the layout really changed ... */
74	  if (menu->items && menu->items[0])
75	    {
76	      menu->toprow = 0;
77	      menu->curitem = menu->items[0];
78	      assert(menu->curitem);
79	      set_menu_format(menu, menu->frows, menu->fcols);
80	    }
81	}
82
83      menu->opt = opts;
84
85      if (opts & O_ONEVALUE)
86	{
87	  ITEM **item;
88
89	  if (((item = menu->items) != (ITEM **) 0))
90	    for (; *item; item++)
91	      (*item)->value = FALSE;
92	}
93
94      if (opts & O_SHOWDESC)	/* this also changes the geometry */
95	_nc_Calculate_Item_Length_and_Width(menu);
96    }
97  else
98    _nc_Default_Menu.opt = opts;
99
100  RETURN(E_OK);
101}
102
103/*---------------------------------------------------------------------------
104|   Facility      :  libnmenu
105|   Function      :  int menu_opts_off(MENU *menu, Menu_Options opts)
106|
107|   Description   :  Switch off the options for this menu. If the new settings
108|                    end up in a change of the geometry of the menu, it
109|                    will be recalculated. This operation is forbidden if
110|                    the menu is already posted.
111|
112|   Return Values :  E_OK           - success
113|                    E_BAD_ARGUMENT - invalid options
114|                    E_POSTED       - menu is already posted
115+--------------------------------------------------------------------------*/
116NCURSES_EXPORT(int)
117menu_opts_off(MENU * menu, Menu_Options opts)
118{
119  MENU *cmenu = menu;		/* use a copy because set_menu_opts must detect
120
121				   NULL menu itself to adjust its behavior */
122
123  T((T_CALLED("menu_opts_off(%p,%d)"), (void *)menu, opts));
124
125  opts &= ALL_MENU_OPTS;
126  if (opts & ~ALL_MENU_OPTS)
127    RETURN(E_BAD_ARGUMENT);
128  else
129    {
130      Normalize_Menu(cmenu);
131      opts = cmenu->opt & ~opts;
132      returnCode(set_menu_opts(menu, opts));
133    }
134}
135
136/*---------------------------------------------------------------------------
137|   Facility      :  libnmenu
138|   Function      :  int menu_opts_on(MENU *menu, Menu_Options opts)
139|
140|   Description   :  Switch on the options for this menu. If the new settings
141|                    end up in a change of the geometry of the menu, it
142|                    will be recalculated. This operation is forbidden if
143|                    the menu is already posted.
144|
145|   Return Values :  E_OK           - success
146|                    E_BAD_ARGUMENT - invalid menu options
147|                    E_POSTED       - menu is already posted
148+--------------------------------------------------------------------------*/
149NCURSES_EXPORT(int)
150menu_opts_on(MENU * menu, Menu_Options opts)
151{
152  MENU *cmenu = menu;		/* use a copy because set_menu_opts must detect
153
154				   NULL menu itself to adjust its behavior */
155
156  T((T_CALLED("menu_opts_on(%p,%d)"), (void *)menu, opts));
157
158  opts &= ALL_MENU_OPTS;
159  if (opts & ~ALL_MENU_OPTS)
160    RETURN(E_BAD_ARGUMENT);
161  else
162    {
163      Normalize_Menu(cmenu);
164      opts = cmenu->opt | opts;
165      returnCode(set_menu_opts(menu, opts));
166    }
167}
168
169/*---------------------------------------------------------------------------
170|   Facility      :  libnmenu
171|   Function      :  Menu_Options menu_opts(const MENU *menu)
172|
173|   Description   :  Return the options for this menu.
174|
175|   Return Values :  Menu options
176+--------------------------------------------------------------------------*/
177NCURSES_EXPORT(Menu_Options)
178menu_opts(const MENU * menu)
179{
180  T((T_CALLED("menu_opts(%p)"), (const void *)menu));
181  returnMenuOpts(ALL_MENU_OPTS & Normalize_Menu(menu)->opt);
182}
183
184/* m_opts.c ends here */
185