set_current_item(MENU * menu, ITEM * item)
{
T((T_CALLED("set_current_item(%p,%p)"), menu, item));
if (menu && item && (item->imenu == menu))
{
if (menu->status & _IN_DRIVER)
RETURN(E_BAD_STATE);
assert(menu->curitem);
if (item != menu->curitem)
{
if (menu->status & _LINK_NEEDED)
{
/*
* Items are available, but they are not linked together.
* So we have to link here.
*/
_nc_Link_Items(menu);
}
assert(menu->pattern);
Reset_Pattern(menu);
/* adjust the window to make item visible and update the menu */
Adjust_Current_Item(menu, menu->toprow, item);
}
}
else
RETURN(E_BAD_ARGUMENT);
RETURN(E_OK);
}
set_top_row(MENU * menu, int row)
{
ITEM *item;
T((T_CALLED("set_top_row(%p,%d)"), menu, row));
if (menu)
{
if (menu->status & _IN_DRIVER)
RETURN(E_BAD_STATE);
if (menu->items == (ITEM **) 0)
RETURN(E_NOT_CONNECTED);
if ((row < 0) || (row > (menu->rows - menu->arows)))
RETURN(E_BAD_ARGUMENT);
}
else
RETURN(E_BAD_ARGUMENT);
if (row != menu->toprow)
{
if (menu->status & _LINK_NEEDED)
_nc_Link_Items(menu);
item = menu->items[(menu->opt & O_ROWMAJOR) ? (row * menu->cols) : row];
assert(menu->pattern);
Reset_Pattern(menu);
_nc_New_TopRow_and_CurrentItem(menu, row, item);
}
RETURN(E_OK);
}
set_menu_pattern(MENU * menu, const char *p)
{
ITEM *matchitem;
int matchpos;
T((T_CALLED("set_menu_pattern(%p,%s)"), menu, _nc_visbuf(p)));
if (!menu || !p)
RETURN(E_BAD_ARGUMENT);
if (!(menu->items))
RETURN(E_NOT_CONNECTED);
if (menu->status & _IN_DRIVER)
RETURN(E_BAD_STATE);
Reset_Pattern(menu);
if (!(*p))
{
pos_menu_cursor(menu);
RETURN(E_OK);
}
if (menu->status & _LINK_NEEDED)
_nc_Link_Items(menu);
matchpos = menu->toprow;
matchitem = menu->curitem;
assert(matchitem);
while (*p)
{
if (!isprint(UChar(*p)) ||
(_nc_Match_Next_Character_In_Item_Name(menu, *p, &matchitem) != E_OK))
{
Reset_Pattern(menu);
pos_menu_cursor(menu);
RETURN(E_NO_MATCH);
}
p++;
}
/* This is reached if there was a match. So we position to the new item */
Adjust_Current_Item(menu, matchpos, matchitem);
RETURN(E_OK);
}
set_menu_format(MENU * menu, int rows, int cols)
{
int total_rows, total_cols;
T((T_CALLED("set_menu_format(%p,%d,%d)"), menu, rows, cols));
if (rows < 0 || cols < 0)
RETURN(E_BAD_ARGUMENT);
if (menu)
{
if (menu->status & _POSTED)
RETURN(E_POSTED);
if (!(menu->items))
RETURN(E_NOT_CONNECTED);
if (rows == 0)
rows = menu->frows;
if (cols == 0)
cols = menu->fcols;
if (menu->pattern)
Reset_Pattern(menu);
menu->frows = rows;
menu->fcols = cols;
assert(rows > 0 && cols > 0);
total_rows = (menu->nitems - 1) / cols + 1;
total_cols = (menu->opt & O_ROWMAJOR) ?
minimum(menu->nitems, cols) :
(menu->nitems - 1) / total_rows + 1;
menu->rows = total_rows;
menu->cols = total_cols;
menu->arows = minimum(total_rows, rows);
menu->toprow = 0;
menu->curitem = *(menu->items);
assert(menu->curitem);
menu->status |= _LINK_NEEDED;
_nc_Calculate_Item_Length_and_Width(menu);
}
else
{
if (rows > 0)
_nc_Default_Menu.frows = rows;
if (cols > 0)
_nc_Default_Menu.fcols = cols;
}
RETURN(E_OK);
}
/*---------------------------------------------------------------------------
| 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);
}
menu_driver(MENU * menu, int c)
{
#define NAVIGATE(dir) \
if (!item->dir)\
result = E_REQUEST_DENIED;\
else\
item = item->dir
int result = E_OK;
ITEM *item;
int my_top_row, rdiff;
T((T_CALLED("menu_driver(%p,%d)"), (void *)menu, c));
if (!menu)
RETURN(E_BAD_ARGUMENT);
if (menu->status & _IN_DRIVER)
RETURN(E_BAD_STATE);
if (!(menu->status & _POSTED))
RETURN(E_NOT_POSTED);
item = menu->curitem;
my_top_row = menu->toprow;
assert(item);
if ((c > KEY_MAX) && (c <= MAX_MENU_COMMAND))
{
if (!((c == REQ_BACK_PATTERN)
|| (c == REQ_NEXT_MATCH) || (c == REQ_PREV_MATCH)))
{
assert(menu->pattern);
Reset_Pattern(menu);
}
switch (c)
{
case REQ_LEFT_ITEM:
/*=================*/
NAVIGATE(left);
break;
case REQ_RIGHT_ITEM:
/*==================*/
NAVIGATE(right);
break;
case REQ_UP_ITEM:
/*===============*/
NAVIGATE(up);
break;
case REQ_DOWN_ITEM:
/*=================*/
NAVIGATE(down);
break;
case REQ_SCR_ULINE:
/*=================*/
if (my_top_row == 0 || !(item->up))
result = E_REQUEST_DENIED;
else
{
--my_top_row;
item = item->up;
}
break;
case REQ_SCR_DLINE:
/*=================*/
if ((my_top_row + menu->arows >= menu->rows) || !(item->down))
{
/* only if the menu has less items than rows, we can deny the
request. Otherwise the epilogue of this routine adjusts the
top row if necessary */
result = E_REQUEST_DENIED;
}
else
{
my_top_row++;
item = item->down;
}
break;
case REQ_SCR_DPAGE:
/*=================*/
rdiff = menu->rows - (menu->arows + my_top_row);
if (rdiff > menu->arows)
rdiff = menu->arows;
if (rdiff <= 0)
result = E_REQUEST_DENIED;
else
{
my_top_row += rdiff;
while (rdiff-- > 0 && item != 0 && item->down != 0)
item = item->down;
}
break;
case REQ_SCR_UPAGE:
/*=================*/
rdiff = (menu->arows < my_top_row) ? menu->arows : my_top_row;
if (rdiff <= 0)
result = E_REQUEST_DENIED;
else
{
my_top_row -= rdiff;
while (rdiff-- > 0 && item != 0 && item->up != 0)
item = item->up;
}
break;
case REQ_FIRST_ITEM:
/*==================*/
item = menu->items[0];
break;
case REQ_LAST_ITEM:
/*=================*/
item = menu->items[menu->nitems - 1];
break;
case REQ_NEXT_ITEM:
/*=================*/
if ((item->index + 1) >= menu->nitems)
{
if (menu->opt & O_NONCYCLIC)
result = E_REQUEST_DENIED;
else
item = menu->items[0];
}
else
item = menu->items[item->index + 1];
break;
case REQ_PREV_ITEM:
/*=================*/
if (item->index <= 0)
{
if (menu->opt & O_NONCYCLIC)
result = E_REQUEST_DENIED;
else
item = menu->items[menu->nitems - 1];
}
else
item = menu->items[item->index - 1];
break;
case REQ_TOGGLE_ITEM:
/*===================*/
if (menu->opt & O_ONEVALUE)
{
result = E_REQUEST_DENIED;
}
else
{
if (menu->curitem->opt & O_SELECTABLE)
{
menu->curitem->value = !menu->curitem->value;
Move_And_Post_Item(menu, menu->curitem);
_nc_Show_Menu(menu);
}
else
result = E_NOT_SELECTABLE;
}
break;
case REQ_CLEAR_PATTERN:
/*=====================*/
/* already cleared in prologue */
break;
case REQ_BACK_PATTERN:
/*====================*/
if (menu->pindex > 0)
{
assert(menu->pattern);
Remove_Character_From_Pattern(menu);
pos_menu_cursor(menu);
}
else
result = E_REQUEST_DENIED;
break;
case REQ_NEXT_MATCH:
/*==================*/
assert(menu->pattern);
if (menu->pattern[0])
result = _nc_Match_Next_Character_In_Item_Name(menu, 0, &item);
else
{
if ((item->index + 1) < menu->nitems)
item = menu->items[item->index + 1];
else
{
if (menu->opt & O_NONCYCLIC)
result = E_REQUEST_DENIED;
else
item = menu->items[0];
}
}
break;
case REQ_PREV_MATCH:
/*==================*/
assert(menu->pattern);
if (menu->pattern[0])
result = _nc_Match_Next_Character_In_Item_Name(menu, BS, &item);
else
{
if (item->index)
item = menu->items[item->index - 1];
else
{
if (menu->opt & O_NONCYCLIC)
result = E_REQUEST_DENIED;
else
item = menu->items[menu->nitems - 1];
}
}
break;
default:
/*======*/
result = E_UNKNOWN_COMMAND;
break;
}
}
else
{ /* not a command */
if (!(c & ~((int)MAX_REGULAR_CHARACTER)) && isprint(UChar(c)))
result = _nc_Match_Next_Character_In_Item_Name(menu, c, &item);
#ifdef NCURSES_MOUSE_VERSION
else if (KEY_MOUSE == c)
{
MEVENT event;
WINDOW *uwin = Get_Menu_UserWin(menu);
getmouse(&event);
if ((event.bstate & (BUTTON1_CLICKED |
BUTTON1_DOUBLE_CLICKED |
BUTTON1_TRIPLE_CLICKED))
&& wenclose(uwin, event.y, event.x))
{ /* we react only if the click was in the userwin, that means
* inside the menu display area or at the decoration window.
*/
WINDOW *sub = Get_Menu_Window(menu);
int ry = event.y, rx = event.x; /* screen coordinates */
result = E_REQUEST_DENIED;
if (mouse_trafo(&ry, &rx, FALSE))
{ /* rx, ry are now "curses" coordinates */
if (ry < sub->_begy)
{ /* we clicked above the display region; this is
* interpreted as "scroll up" request
*/
if (event.bstate & BUTTON1_CLICKED)
result = menu_driver(menu, REQ_SCR_ULINE);
else if (event.bstate & BUTTON1_DOUBLE_CLICKED)
result = menu_driver(menu, REQ_SCR_UPAGE);
else if (event.bstate & BUTTON1_TRIPLE_CLICKED)
result = menu_driver(menu, REQ_FIRST_ITEM);
RETURN(result);
}
else if (ry > sub->_begy + sub->_maxy)
{ /* we clicked below the display region; this is
* interpreted as "scroll down" request
*/
if (event.bstate & BUTTON1_CLICKED)
result = menu_driver(menu, REQ_SCR_DLINE);
else if (event.bstate & BUTTON1_DOUBLE_CLICKED)
result = menu_driver(menu, REQ_SCR_DPAGE);
else if (event.bstate & BUTTON1_TRIPLE_CLICKED)
result = menu_driver(menu, REQ_LAST_ITEM);
RETURN(result);
}
else if (wenclose(sub, event.y, event.x))
{ /* Inside the area we try to find the hit item */
int i, x, y, err;
ry = event.y;
rx = event.x;
if (wmouse_trafo(sub, &ry, &rx, FALSE))
{
for (i = 0; i < menu->nitems; i++)
{
err = _nc_menu_cursor_pos(menu, menu->items[i],
&y, &x);
if (E_OK == err)
{
if ((ry == y) &&
(rx >= x) &&
(rx < x + menu->itemlen))
{
item = menu->items[i];
result = E_OK;
break;
}
}
}
if (E_OK == result)
{ /* We found an item, now we can handle the click.
* A single click just positions the menu cursor
* to the clicked item. A double click toggles
* the item.
*/
if (event.bstate & BUTTON1_DOUBLE_CLICKED)
{
_nc_New_TopRow_and_CurrentItem(menu,
my_top_row,
item);
menu_driver(menu, REQ_TOGGLE_ITEM);
result = E_UNKNOWN_COMMAND;
}
}
}
}
}
}
else
result = E_REQUEST_DENIED;
}
#endif /* NCURSES_MOUSE_VERSION */
else
result = E_UNKNOWN_COMMAND;
}
if (E_OK == result)
{
/* Adjust the top row if it turns out that the current item unfortunately
doesn't appear in the menu window */
if (item->y < my_top_row)
my_top_row = item->y;
else if (item->y >= (my_top_row + menu->arows))
my_top_row = item->y - menu->arows + 1;
_nc_New_TopRow_and_CurrentItem(menu, my_top_row, item);
}
RETURN(result);
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : int menu_driver(MENU *menu, int c)
|
| Description : Central dispatcher for the menu. Translates the logical
| request 'c' into a menu action.
|
| Return Values : E_OK - success
| E_BAD_ARGUMENT - invalid menu pointer
| E_BAD_STATE - menu is in user hook routine
| E_NOT_POSTED - menu is not posted
+--------------------------------------------------------------------------*/
int menu_driver(MENU * menu, int c)
{
#define NAVIGATE(dir) \
if (!item->dir)\
result = E_REQUEST_DENIED;\
else\
item = item->dir
int result = E_OK;
ITEM *item;
int my_top_row, rdiff;
if (!menu)
RETURN(E_BAD_ARGUMENT);
if ( menu->status & _IN_DRIVER )
RETURN(E_BAD_STATE);
if ( !( menu->status & _POSTED ) )
RETURN(E_NOT_POSTED);
my_top_row = menu->toprow;
item = menu->curitem;
assert(item);
if ((c > KEY_MAX) && (c<=MAX_MENU_COMMAND))
{
if (!((c==REQ_BACK_PATTERN)
|| (c==REQ_NEXT_MATCH) || (c==REQ_PREV_MATCH)))
{
assert( menu->pattern );
Reset_Pattern(menu);
}
switch(c)
{
case REQ_LEFT_ITEM:
/*=================*/
NAVIGATE(left);
break;
case REQ_RIGHT_ITEM:
/*==================*/
NAVIGATE(right);
break;
case REQ_UP_ITEM:
/*===============*/
NAVIGATE(up);
break;
case REQ_DOWN_ITEM:
/*=================*/
NAVIGATE(down);
break;
case REQ_SCR_ULINE:
/*=================*/
if (my_top_row == 0)
result = E_REQUEST_DENIED;
else
{
--my_top_row;
item = item->up;
}
break;
case REQ_SCR_DLINE:
/*=================*/
my_top_row++;
if ((menu->rows - menu->arows)>0)
{
/* only if the menu has less items than rows, we can deny the
request. Otherwise the epilogue of this routine adjusts the
top row if necessary */
my_top_row--;
result = E_REQUEST_DENIED;
}
else
item = item->down;
break;
case REQ_SCR_DPAGE:
/*=================*/
rdiff = menu->rows - menu->arows - my_top_row;
if (rdiff > menu->arows)
rdiff = menu->arows;
if (rdiff==0)
result = E_REQUEST_DENIED;
else
{
my_top_row += rdiff;
while(rdiff-- > 0)
item = item->down;
}
break;
case REQ_SCR_UPAGE:
/*=================*/
rdiff = (menu->arows < my_top_row) ?
menu->arows : my_top_row;
if (rdiff==0)
result = E_REQUEST_DENIED;
else
{
my_top_row -= rdiff;
while(rdiff--)
item = item->up;
}
break;
case REQ_FIRST_ITEM:
/*==================*/
item = menu->items[0];
break;
case REQ_LAST_ITEM:
/*=================*/
item = menu->items[menu->nitems-1];
break;
case REQ_NEXT_ITEM:
/*=================*/
if ((item->index+1)>=menu->nitems)
{
if (menu->opt & O_NONCYCLIC)
result = E_REQUEST_DENIED;
else
item = menu->items[0];
}
else
item = menu->items[item->index + 1];
break;
case REQ_PREV_ITEM:
/*=================*/
if (item->index<=0)
{
if (menu->opt & O_NONCYCLIC)
result = E_REQUEST_DENIED;
else
item = menu->items[menu->nitems-1];
}
else
item = menu->items[item->index - 1];
break;
case REQ_TOGGLE_ITEM:
/*===================*/
if (menu->opt & O_ONEVALUE)
{
result = E_REQUEST_DENIED;
}
else
{
if (menu->curitem->opt & O_SELECTABLE)
{
menu->curitem->value = !menu->curitem->value;
Move_And_Post_Item(menu,menu->curitem);
_nc_Show_Menu(menu);
}
else
result = E_NOT_SELECTABLE;
}
break;
case REQ_CLEAR_PATTERN:
/*=====================*/
/* already cleared in prologue */
break;
case REQ_BACK_PATTERN:
/*====================*/
if (menu->pindex>0)
{
assert(menu->pattern);
Remove_Character_From_Pattern(menu);
pos_menu_cursor( menu );
}
else
result = E_REQUEST_DENIED;
break;
case REQ_NEXT_MATCH:
/*==================*/
assert(menu->pattern);
if (menu->pattern[0])
result = _nc_Match_Next_Character_In_Item_Name(menu,0,&item);
else
{
if ((item->index+1)<menu->nitems)
item=menu->items[item->index+1];
else
{
if (menu->opt & O_NONCYCLIC)
result = E_REQUEST_DENIED;
else
item = menu->items[0];
}
}
break;
case REQ_PREV_MATCH:
/*==================*/
assert(menu->pattern);
if (menu->pattern[0])
result = _nc_Match_Next_Character_In_Item_Name(menu,BS,&item);
else
{
if (item->index)
item = menu->items[item->index-1];
else
{
if (menu->opt & O_NONCYCLIC)
result = E_REQUEST_DENIED;
else
item = menu->items[menu->nitems-1];
}
}
break;
default:
/*======*/
result = E_UNKNOWN_COMMAND;
break;
}
}
else
{ /* not a command */
if ( !(c & ~((int)MAX_REGULAR_CHARACTER)) && isprint(c) )
result = _nc_Match_Next_Character_In_Item_Name( menu, c, &item );
else
result = E_UNKNOWN_COMMAND;
}
/* Adjust the top row if it turns out that the current item unfortunately
doesn't appear in the menu window */
if ( item->y < my_top_row )
my_top_row = item->y;
else if ( item->y >= (my_top_row + menu->arows) )
my_top_row = item->y - menu->arows + 1;
_nc_New_TopRow_and_CurrentItem( menu, my_top_row, item );
RETURN(result);
}