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28
29/****************************************************************************
30 *   Author:  Juergen Pfeifer, 1995,1997                                    *
31 ****************************************************************************/
32
33/***************************************************************************
34* Module m_opts                                                            *
35* Menus option routines                                                    *
36***************************************************************************/
37
38#include "menu.priv.h"
39
40MODULE_ID("$Id: m_opts.c,v 1.20 2010/01/23 21:20:10 tom Exp $")
41
42/*---------------------------------------------------------------------------
43|   Facility      :  libnmenu
44|   Function      :  int set_menu_opts(MENU *menu, Menu_Options opts)
45|
46|   Description   :  Set the options for this menu. If the new settings
47|                    end up in a change of the geometry of the menu, it
48|                    will be recalculated. This operation is forbidden if
49|                    the menu is already posted.
50|
51|   Return Values :  E_OK           - success
52|                    E_BAD_ARGUMENT - invalid menu options
53|                    E_POSTED       - menu is already posted
54+--------------------------------------------------------------------------*/
55NCURSES_EXPORT(int)
56set_menu_opts(MENU * menu, Menu_Options opts)
57{
58  T((T_CALLED("set_menu_opts(%p,%d)"), (void *)menu, opts));
59
60  opts &= ALL_MENU_OPTS;
61
62  if (opts & ~ALL_MENU_OPTS)
63    RETURN(E_BAD_ARGUMENT);
64
65  if (menu)
66    {
67      if (menu->status & _POSTED)
68	RETURN(E_POSTED);
69
70      if ((opts & O_ROWMAJOR) != (menu->opt & O_ROWMAJOR))
71	{
72	  /* we need this only if the layout really changed ... */
73	  if (menu->items && menu->items[0])
74	    {
75	      menu->toprow = 0;
76	      menu->curitem = menu->items[0];
77	      assert(menu->curitem);
78	      set_menu_format(menu, menu->frows, menu->fcols);
79	    }
80	}
81
82      menu->opt = opts;
83
84      if (opts & O_ONEVALUE)
85	{
86	  ITEM **item;
87
88	  if (((item = menu->items) != (ITEM **) 0))
89	    for (; *item; item++)
90	      (*item)->value = FALSE;
91	}
92
93      if (opts & O_SHOWDESC)	/* this also changes the geometry */
94	_nc_Calculate_Item_Length_and_Width(menu);
95    }
96  else
97    _nc_Default_Menu.opt = opts;
98
99  RETURN(E_OK);
100}
101
102/*---------------------------------------------------------------------------
103|   Facility      :  libnmenu
104|   Function      :  int menu_opts_off(MENU *menu, Menu_Options opts)
105|
106|   Description   :  Switch off the options for this menu. If the new settings
107|                    end up in a change of the geometry of the menu, it
108|                    will be recalculated. This operation is forbidden if
109|                    the menu is already posted.
110|
111|   Return Values :  E_OK           - success
112|                    E_BAD_ARGUMENT - invalid options
113|                    E_POSTED       - menu is already posted
114+--------------------------------------------------------------------------*/
115NCURSES_EXPORT(int)
116menu_opts_off(MENU * menu, Menu_Options opts)
117{
118  MENU *cmenu = menu;		/* use a copy because set_menu_opts must detect
119
120				   NULL menu itself to adjust its behavior */
121
122  T((T_CALLED("menu_opts_off(%p,%d)"), (void *)menu, opts));
123
124  opts &= ALL_MENU_OPTS;
125  if (opts & ~ALL_MENU_OPTS)
126    RETURN(E_BAD_ARGUMENT);
127  else
128    {
129      Normalize_Menu(cmenu);
130      opts = cmenu->opt & ~opts;
131      returnCode(set_menu_opts(menu, opts));
132    }
133}
134
135/*---------------------------------------------------------------------------
136|   Facility      :  libnmenu
137|   Function      :  int menu_opts_on(MENU *menu, Menu_Options opts)
138|
139|   Description   :  Switch on the options for this menu. If the new settings
140|                    end up in a change of the geometry of the menu, it
141|                    will be recalculated. This operation is forbidden if
142|                    the menu is already posted.
143|
144|   Return Values :  E_OK           - success
145|                    E_BAD_ARGUMENT - invalid menu options
146|                    E_POSTED       - menu is already posted
147+--------------------------------------------------------------------------*/
148NCURSES_EXPORT(int)
149menu_opts_on(MENU * menu, Menu_Options opts)
150{
151  MENU *cmenu = menu;		/* use a copy because set_menu_opts must detect
152
153				   NULL menu itself to adjust its behavior */
154
155  T((T_CALLED("menu_opts_on(%p,%d)"), (void *)menu, opts));
156
157  opts &= ALL_MENU_OPTS;
158  if (opts & ~ALL_MENU_OPTS)
159    RETURN(E_BAD_ARGUMENT);
160  else
161    {
162      Normalize_Menu(cmenu);
163      opts = cmenu->opt | opts;
164      returnCode(set_menu_opts(menu, opts));
165    }
166}
167
168/*---------------------------------------------------------------------------
169|   Facility      :  libnmenu
170|   Function      :  Menu_Options menu_opts(const MENU *menu)
171|
172|   Description   :  Return the options for this menu.
173|
174|   Return Values :  Menu options
175+--------------------------------------------------------------------------*/
176NCURSES_EXPORT(Menu_Options)
177menu_opts(const MENU * menu)
178{
179  T((T_CALLED("menu_opts(%p)"), (const void *)menu));
180  returnMenuOpts(ALL_MENU_OPTS & Normalize_Menu(menu)->opt);
181}
182
183/* m_opts.c ends here */
184