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freebsd/contrib/ncurses/menu/m_global.c
Peter Wemm 0e3d540892 Import unmodified (but trimmed) ncurses 5.0 prerelease 990821. 
This contains the full eti (panel, form, menu) extensions.
bmake glue to follow.

Obtained from:	ftp://ftp.clark.net/pub/dickey/ncurses
1999-08-24 01:06:48 +00:00

484 lines
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/****************************************************************************
* Copyright (c) 1998 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/****************************************************************************
* Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997 *
****************************************************************************/
/***************************************************************************
* Module m_global *
* Globally used internal routines and the default menu and item structures *
***************************************************************************/
#include "menu.priv.h"
MODULE_ID("$Id: m_global.c,v 1.11 1999/05/16 17:25:14 juergen Exp $")
MENU _nc_Default_Menu = {
16, /* Nr. of chars high */
1, /* Nr. of chars wide */
16, /* Nr. of items high */
1, /* Nr. of items wide */
16, /* Nr. of formatted items high */
1, /* Nr. of formatted items wide */
16, /* Nr. of items high (actual) */
0, /* length of widest name */
0, /* length of widest description */
1, /* length of mark */
1, /* length of one item */
1, /* Spacing for descriptor */
1, /* Spacing for columns */
1, /* Spacing for rows */
(char *)0, /* buffer used to store match chars */
0, /* Index into pattern buffer */
(WINDOW *)0, /* Window containing entire menu */
(WINDOW *)0, /* Portion of menu displayed */
(WINDOW *)0, /* User's window */
(WINDOW *)0, /* User's subwindow */
(ITEM **)0, /* List of items */
0, /* Total Nr. of items in menu */
(ITEM *)0, /* Current item */
0, /* Top row of menu */
(chtype)A_REVERSE, /* Attribute for selection */
(chtype)A_NORMAL, /* Attribute for nonselection */
(chtype)A_UNDERLINE, /* Attribute for inactive */
' ', /* Pad character */
(Menu_Hook)0, /* Menu init */
(Menu_Hook)0, /* Menu term */
(Menu_Hook)0, /* Item init */
(Menu_Hook)0, /* Item term */
(void *)0, /* userptr */
"-", /* mark */
ALL_MENU_OPTS, /* options */
0 /* status */
};
ITEM _nc_Default_Item = {
{ (char *)0, 0 }, /* name */
{ (char *)0, 0 }, /* description */
(MENU *)0, /* Pointer to parent menu */
(char *)0, /* Userpointer */
ALL_ITEM_OPTS, /* options */
0, /* Item Nr. */
0, /* y */
0, /* x */
FALSE, /* value */
(ITEM *)0, /* left */
(ITEM *)0, /* right */
(ITEM *)0, /* up */
(ITEM *)0 /* down */
};
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : static void ComputeMaximum_NameDesc_Lenths(MENU *menu)
|
| Description : Calculates the maximum name and description lengths
| of the items connected to the menu
|
| Return Values : -
+--------------------------------------------------------------------------*/
INLINE static void ComputeMaximum_NameDesc_Lengths(MENU * menu)
{
unsigned MaximumNameLength = 0;
unsigned MaximumDescriptionLength = 0;
ITEM **items;
assert(menu && menu->items);
for( items = menu->items; *items ; items++ )
{
if (items[0]->name.length > MaximumNameLength )
MaximumNameLength = items[0]->name.length;
if (items[0]->description.length > MaximumDescriptionLength)
MaximumDescriptionLength = items[0]->description.length;
}
menu->namelen = MaximumNameLength;
menu->desclen = MaximumDescriptionLength;
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : static void ResetConnectionInfo(MENU *, ITEM **)
|
| Description : Reset all informations in the menu and the items in
| the item array that indicates a connection
|
| Return Values : -
+--------------------------------------------------------------------------*/
INLINE static void ResetConnectionInfo(MENU *menu, ITEM **items)
{
ITEM **item;
assert(menu && items);
for(item=items; *item; item++)
{
(*item)->index = 0;
(*item)->imenu = (MENU *)0;
}
if (menu->pattern)
free(menu->pattern);
menu->pattern = (char *)0;
menu->pindex = 0;
menu->items = (ITEM **)0;
menu->nitems = 0;
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : bool _nc_Connect_Items(MENU *menu, ITEM **items)
|
| Description : Connect the items in the item array to the menu.
| Decorate all the items with a number and a backward
| pointer to the menu.
|
| Return Values : TRUE - successfull connection
| FALSE - connection failed
+--------------------------------------------------------------------------*/
bool _nc_Connect_Items(MENU *menu, ITEM **items)
{
ITEM **item;
unsigned int ItemCount = 0;
if ( menu && items )
{
for(item=items; *item ; item++)
{
if ( (*item)->imenu )
{
/* if a item is already connected, reject connection */
break;
}
}
if (! (*item) )
/* we reached the end, so there was no connected item */
{
for(item=items; *item ; item++)
{
if (menu->opt & O_ONEVALUE)
{
(*item)->value = FALSE;
}
(*item)->index = ItemCount++;
(*item)->imenu = menu;
}
}
}
else
return(FALSE);
if (ItemCount != 0)
{
menu->items = items;
menu->nitems = ItemCount;
ComputeMaximum_NameDesc_Lengths(menu);
if ( (menu->pattern = (char *)malloc( (unsigned)(1 + menu->namelen))) )
{
Reset_Pattern(menu);
set_menu_format(menu,menu->frows,menu->fcols);
menu->curitem = *items;
menu->toprow = 0;
return(TRUE);
}
}
/* If we fall through to this point, we have to reset all items connection
and inform about a reject connection */
ResetConnectionInfo( menu, items );
return(FALSE);
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : void _nc_Disconnect_Items(MENU *menu)
|
| Description : Disconnect the menus item array from the menu
|
| Return Values : -
+--------------------------------------------------------------------------*/
void _nc_Disconnect_Items(MENU * menu)
{
if (menu && menu->items)
ResetConnectionInfo( menu, menu->items );
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : void _nc_Calculate_Item_Length_and_Width(MENU *menu)
|
| Description : Calculate the length of an item and the width of the
| whole menu.
|
| Return Values : -
+--------------------------------------------------------------------------*/
void _nc_Calculate_Item_Length_and_Width(MENU * menu)
{
int l;
assert(menu);
menu->height = 1 + menu->spc_rows * (menu->arows - 1);
l = menu->namelen + menu->marklen;
if ( (menu->opt & O_SHOWDESC) && (menu->desclen > 0) )
l += (menu->desclen + menu->spc_desc);
menu->itemlen = l;
l *= menu->cols;
l += (menu->cols-1)*menu->spc_cols; /* for the padding between the columns */
menu->width = l;
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : void _nc_Link_Item(MENU *menu)
|
| Description : Statically calculate for every item its four neighbours.
| This depends on the orientation of the menu. This
| static aproach simplifies navigation in the menu a lot.
|
| Return Values : -
+--------------------------------------------------------------------------*/
void _nc_Link_Items(MENU * menu)
{
if (menu && menu->items && *(menu->items))
{
int i,j;
ITEM *item;
int Number_Of_Items = menu->nitems;
int col = 0, row = 0;
int Last_in_Row;
int Last_in_Column;
bool cycle = (menu->opt & O_NONCYCLIC) ? FALSE : TRUE;
menu->status &= ~_LINK_NEEDED;
if (menu->opt & O_ROWMAJOR)
{
int Number_Of_Columns = menu->cols;
for(i=0; i < Number_Of_Items; i++)
{
item = menu->items[i];
Last_in_Row = row * Number_Of_Columns + (Number_Of_Columns-1);
item->left = (col) ?
/* if we are not in the leftmost column, we can use the
predecessor in the items array */
menu->items[i-1] :
(cycle ? menu->items[(Last_in_Row>=Number_Of_Items) ?
Number_Of_Items-1:
Last_in_Row] :
(ITEM *)0 );
item->right = ( (col < (Number_Of_Columns-1)) &&
((i+1) < Number_Of_Items)
) ?
menu->items[i+1] :
( cycle ? menu->items[row * Number_Of_Columns] :
(ITEM *)0
);
Last_in_Column = (menu->rows-1) * Number_Of_Columns + col;
item->up = (row) ? menu->items[i-Number_Of_Columns] :
(cycle ? menu->items[(Last_in_Column>=Number_Of_Items) ?
Number_Of_Items-1 :
Last_in_Column] :
(ITEM *)0);
item->down = ( (i+Number_Of_Columns) < Number_Of_Items )
?
menu->items[i + Number_Of_Columns] :
(cycle ? menu->items[(row+1)<menu->rows ?
Number_Of_Items-1:col] :
(ITEM *)0);
item->x = col;
item->y = row;
if ( ++col == Number_Of_Columns )
{
row++;
col = 0;
}
}
}
else
{
int Number_Of_Rows = menu->rows;
for(j=0; j<Number_Of_Items; j++)
{
item = menu->items[i=(col * Number_Of_Rows + row)];
Last_in_Column = (menu->cols-1) * Number_Of_Rows + row;
item->left = (col) ?
menu->items[i - Number_Of_Rows] :
(cycle ? (Last_in_Column >= Number_Of_Items ) ?
menu->items[Last_in_Column-Number_Of_Rows] :
menu->items[Last_in_Column] :
(ITEM *)0 );
item->right = ((i + Number_Of_Rows) <Number_Of_Items)
?
menu->items[i + Number_Of_Rows] :
(cycle ? menu->items[row] : (ITEM *)0);
Last_in_Row = col * Number_Of_Rows + (Number_Of_Rows - 1);
item->up = (row) ?
menu->items[i-1] :
(cycle ?
menu->items[(Last_in_Row>=Number_Of_Items) ?
Number_Of_Items-1:
Last_in_Row] :
(ITEM *)0);
item->down = (row < (Number_Of_Rows-1))
?
(menu->items[((i+1)<Number_Of_Items) ?
i+1 :
(col-1)*Number_Of_Rows + row + 1]) :
(cycle ?
menu->items[col * Number_Of_Rows] :
(ITEM *)0
);
item->x = col;
item->y = row;
if ( (++row) == Number_Of_Rows )
{
col++;
row = 0;
}
}
}
}
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : void _nc_Show_Menu(const MENU *menu)
|
| Description : Update the window that is associated with the menu
|
| Return Values : -
+--------------------------------------------------------------------------*/
void _nc_Show_Menu(const MENU *menu)
{
WINDOW *win;
int maxy, maxx;
assert(menu);
if ( (menu->status & _POSTED) && !(menu->status & _IN_DRIVER) )
{
/* adjust the internal subwindow to start on the current top */
assert(menu->sub);
mvderwin(menu->sub,menu->spc_rows * menu->toprow,0);
win = Get_Menu_Window(menu);
maxy = getmaxy(win);
maxx = getmaxx(win);
if (menu->height < maxy)
maxy = menu->height;
if (menu->width < maxx)
maxx = menu->width;
copywin(menu->sub,win,0,0,0,0,maxy-1,maxx-1,0);
pos_menu_cursor(menu);
}
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : void _nc_New_TopRow_and_CurrentItem(
| MENU *menu,
| int new_toprow,
| ITEM *new_current_item)
|
| Description : Redisplay the menu so that the given row becomes the
| top row and the given item becomes the new current
| item.
|
| Return Values : -
+--------------------------------------------------------------------------*/
void _nc_New_TopRow_and_CurrentItem(MENU *menu, int new_toprow,
ITEM *new_current_item)
{
ITEM *cur_item;
bool mterm_called = FALSE;
bool iterm_called = FALSE;
assert(menu);
if (menu->status & _POSTED)
{
if (new_current_item != menu->curitem)
{
Call_Hook(menu,itemterm);
iterm_called = TRUE;
}
if (new_toprow != menu->toprow)
{
Call_Hook(menu,menuterm);
mterm_called = TRUE;
}
cur_item = menu->curitem;
assert(cur_item);
menu->toprow = new_toprow;
menu->curitem = new_current_item;
if (mterm_called)
{
Call_Hook(menu,menuinit);
}
if (iterm_called)
{
/* this means, move from the old current_item to the new one... */
Move_To_Current_Item( menu, cur_item );
Call_Hook(menu,iteminit);
}
if (mterm_called || iterm_called)
{
_nc_Show_Menu(menu);
}
else
pos_menu_cursor(menu);
}
else
{ /* if we are not posted, this is quite simple */
menu->toprow = new_toprow;
menu->curitem = new_current_item;
}
}
/* m_global.c ends here */
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