_nc_Match_Next_Character_In_Item_Name
(MENU * menu, int ch, ITEM ** item)
{
bool found = FALSE, passed = FALSE;
int idx, last;
T((T_CALLED("_nc_Match_Next_Character(%p,%d,%p)"),
(void *)menu, ch, (void *)item));
assert(menu && item && *item);
idx = (*item)->index;
if (ch && ch != BS)
{
/* if we become to long, we need no further checking : there can't be
a match ! */
if ((menu->pindex + 1) > menu->namelen)
RETURN(E_NO_MATCH);
Add_Character_To_Pattern(menu, ch);
/* we artificially position one item back, because in the do...while
loop we start with the next item. This means, that with a new
pattern search we always start the scan with the actual item. If
we do a NEXT_PATTERN oder PREV_PATTERN search, we start with the
one after or before the actual item. */
if (--idx < 0)
idx = menu->nitems - 1;
}
last = idx; /* this closes the cycle */
do
{
if (ch == BS)
{ /* we have to go backward */
if (--idx < 0)
idx = menu->nitems - 1;
}
else
{ /* otherwise we always go forward */
if (++idx >= menu->nitems)
idx = 0;
}
if (Is_Sub_String((bool)((menu->opt & O_IGNORECASE) != 0),
menu->pattern,
menu->items[idx]->name.str)
)
found = TRUE;
else
passed = TRUE;
}
while (!found && (idx != last));
if (found)
{
if (!((idx == (*item)->index) && passed))
{
*item = menu->items[idx];
RETURN(E_OK);
}
/* This point is reached, if we fully cycled through the item list
and the only match we found is the starting item. With a NEXT_PATTERN
or PREV_PATTERN scan this means, that there was no additional match.
If we searched with an expanded new pattern, we should never reach
this point, because if the expanded pattern matches also the actual
item we will find it in the first attempt (passed==FALSE) and we
will never cycle through the whole item array.
*/
assert(ch == 0 || ch == BS);
}
else
{
if (ch && ch != BS && menu->pindex > 0)
{
/* if we had no match with a new pattern, we have to restore it */
Remove_Character_From_Pattern(menu);
}
}
RETURN(E_NO_MATCH);
}
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);
}