260 lines
7.4 KiB
C
260 lines
7.4 KiB
C
/* $NetBSD: driver.c,v 1.6 2000/07/11 06:07:26 itohy Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1998-1999 Brett Lymn (blymn@baea.com.au, brett_lymn@yahoo.com.au)
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. The name of the author may not be used to endorse or promote products
|
|
* derived from this software withough specific prior written permission
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
*
|
|
*/
|
|
|
|
#include <menu.h>
|
|
#include <ctype.h>
|
|
#include <stdlib.h>
|
|
#include "internals.h"
|
|
|
|
/*
|
|
* The guts of the menu library. This function processes the character
|
|
* in c and performs actions based on the value of the character. If the
|
|
* character is a normal one then the driver attempts to match the character
|
|
* against the items. If the character is a recognised request then the
|
|
* request is processed by the driver, if the character is not a recognised
|
|
* request and is not printable then it assumed to be a user defined command.
|
|
*/
|
|
int
|
|
menu_driver(MENU *menu, int c)
|
|
{
|
|
int drv_top_row, drv_scroll, it, status = E_OK;
|
|
ITEM *drv_new_item;
|
|
|
|
if (menu == NULL)
|
|
return E_BAD_ARGUMENT;
|
|
if (menu->posted == 0)
|
|
return E_NOT_POSTED;
|
|
if (menu->items == NULL)
|
|
return E_NOT_CONNECTED;
|
|
if (*menu->items == NULL)
|
|
return E_NOT_CONNECTED;
|
|
if (menu->in_init == 1)
|
|
return E_BAD_STATE;
|
|
|
|
/* this one should never happen but just in case.... */
|
|
if (menu->items[menu->cur_item] == NULL)
|
|
return E_SYSTEM_ERROR;
|
|
|
|
drv_new_item = menu->items[menu->cur_item];
|
|
it = menu->cur_item;
|
|
drv_top_row = menu->top_row;
|
|
|
|
if ((c > REQ_BASE_NUM) && (c <= MAX_COMMAND)) {
|
|
/* is a known driver request - first check if the pattern
|
|
* buffer needs to be cleared, we do this on non-search
|
|
* type requests.
|
|
*/
|
|
if (! ((c == REQ_BACK_PATTERN) || (c == REQ_NEXT_MATCH) ||
|
|
(c == REQ_PREV_MATCH))) {
|
|
if ((c == REQ_CLEAR_PATTERN)
|
|
&& (menu->pattern == NULL))
|
|
return E_REQUEST_DENIED;
|
|
free(menu->pattern);
|
|
menu->pattern = NULL;
|
|
menu->plen = 0;
|
|
menu->match_len = 0;
|
|
}
|
|
|
|
switch (c) {
|
|
case REQ_LEFT_ITEM:
|
|
drv_new_item = drv_new_item->left;
|
|
break;
|
|
case REQ_RIGHT_ITEM:
|
|
drv_new_item = drv_new_item->right;
|
|
break;
|
|
case REQ_UP_ITEM:
|
|
drv_new_item = drv_new_item->up;
|
|
break;
|
|
case REQ_DOWN_ITEM:
|
|
drv_new_item = drv_new_item->down;
|
|
break;
|
|
case REQ_SCR_ULINE:
|
|
if (drv_top_row == 0)
|
|
return E_REQUEST_DENIED;
|
|
drv_top_row--;
|
|
drv_new_item = drv_new_item->up;
|
|
break;
|
|
case REQ_SCR_DLINE:
|
|
drv_top_row++;
|
|
if ((drv_top_row + menu->rows - 1)> menu->item_rows)
|
|
return E_REQUEST_DENIED;
|
|
drv_new_item = drv_new_item->down;
|
|
break;
|
|
case REQ_SCR_DPAGE:
|
|
drv_scroll = menu->item_rows - menu->rows
|
|
- menu->top_row;
|
|
if (drv_scroll > menu->rows) {
|
|
drv_scroll = menu->rows;
|
|
}
|
|
|
|
if (drv_scroll <= 0) {
|
|
return E_REQUEST_DENIED;
|
|
} else {
|
|
drv_top_row += drv_scroll;
|
|
while (drv_scroll-- > 0)
|
|
drv_new_item = drv_new_item->down;
|
|
}
|
|
break;
|
|
case REQ_SCR_UPAGE:
|
|
if (menu->rows < menu->top_row) {
|
|
drv_scroll = menu->rows;
|
|
} else {
|
|
drv_scroll = menu->top_row;
|
|
}
|
|
if (drv_scroll == 0)
|
|
return E_REQUEST_DENIED;
|
|
|
|
drv_top_row -= drv_scroll;
|
|
while (drv_scroll-- > 0)
|
|
drv_new_item = drv_new_item->up;
|
|
break;
|
|
case REQ_FIRST_ITEM:
|
|
drv_new_item = menu->items[0];
|
|
break;
|
|
case REQ_LAST_ITEM:
|
|
drv_new_item = menu->items[menu->item_count - 1];
|
|
break;
|
|
case REQ_NEXT_ITEM:
|
|
if ((menu->cur_item + 1) >= menu->item_count) {
|
|
if ((menu->opts & O_NONCYCLIC)
|
|
== O_NONCYCLIC) {
|
|
return E_REQUEST_DENIED;
|
|
} else {
|
|
drv_new_item = menu->items[0];
|
|
}
|
|
} else {
|
|
drv_new_item =
|
|
menu->items[menu->cur_item + 1];
|
|
}
|
|
break;
|
|
case REQ_PREV_ITEM:
|
|
if (menu->cur_item == 0) {
|
|
if ((menu->opts & O_NONCYCLIC)
|
|
== O_NONCYCLIC) {
|
|
return E_REQUEST_DENIED;
|
|
} else {
|
|
drv_new_item = menu->items[
|
|
menu->item_count - 1];
|
|
}
|
|
} else {
|
|
drv_new_item =
|
|
menu->items[menu->cur_item - 1];
|
|
}
|
|
break;
|
|
case REQ_TOGGLE_ITEM:
|
|
if ((menu->opts & O_ONEVALUE) == O_ONEVALUE) {
|
|
return E_REQUEST_DENIED;
|
|
} else {
|
|
if ((drv_new_item->opts
|
|
& O_SELECTABLE) == O_SELECTABLE) {
|
|
/* toggle select flag */
|
|
drv_new_item->selected ^= 1;
|
|
/* update item in menu */
|
|
_menui_draw_item(menu,
|
|
drv_new_item->index);
|
|
} else {
|
|
return E_NOT_SELECTABLE;
|
|
}
|
|
}
|
|
break;
|
|
case REQ_CLEAR_PATTERN:
|
|
/* this action is taken before the
|
|
case statement */
|
|
break;
|
|
case REQ_BACK_PATTERN:
|
|
if (menu->pattern == NULL)
|
|
return E_REQUEST_DENIED;
|
|
|
|
if (menu->plen == 0)
|
|
return E_REQUEST_DENIED;
|
|
menu->pattern[menu->plen--] = '\0';
|
|
break;
|
|
case REQ_NEXT_MATCH:
|
|
if (menu->pattern == NULL)
|
|
return E_REQUEST_DENIED;
|
|
|
|
status = _menui_match_pattern(menu, 0,
|
|
MATCH_NEXT_FORWARD,
|
|
&it);
|
|
drv_new_item = menu->items[it];
|
|
break;
|
|
case REQ_PREV_MATCH:
|
|
if (menu->pattern == NULL)
|
|
return E_REQUEST_DENIED;
|
|
|
|
status = _menui_match_pattern(menu, 0,
|
|
MATCH_NEXT_REVERSE,
|
|
&it);
|
|
drv_new_item = menu->items[it];
|
|
break;
|
|
}
|
|
} else if (c > MAX_COMMAND) {
|
|
/* must be a user command */
|
|
return E_UNKNOWN_COMMAND;
|
|
} else if (isprint((unsigned char) c)) {
|
|
/* otherwise search items for the character. */
|
|
status = _menui_match_pattern(menu, (unsigned char) c,
|
|
MATCH_FORWARD, &it);
|
|
drv_new_item = menu->items[it];
|
|
|
|
/* update the position of the cursor if we are doing
|
|
* show match and the current item has not changed. If
|
|
* we don't do this here it won't get done since the
|
|
* display will not be updated due to the current item
|
|
* not changing.
|
|
*/
|
|
if ((drv_new_item->index == menu->cur_item)
|
|
&& ((menu->opts & O_SHOWMATCH) == O_SHOWMATCH)) {
|
|
pos_menu_cursor(menu);
|
|
}
|
|
|
|
|
|
} else {
|
|
/* bad character */
|
|
return E_BAD_ARGUMENT;
|
|
}
|
|
|
|
if (drv_new_item == NULL)
|
|
return E_REQUEST_DENIED;
|
|
|
|
if (drv_new_item->row < drv_top_row) drv_top_row = drv_new_item->row;
|
|
if (drv_new_item->row >= (drv_top_row + menu->rows))
|
|
drv_top_row = drv_new_item->row - menu->rows + 1;
|
|
|
|
if ((drv_new_item->index != menu->cur_item)
|
|
|| (drv_top_row != menu->top_row))
|
|
_menui_goto_item(menu, drv_new_item, drv_top_row);
|
|
|
|
return status;
|
|
}
|
|
|
|
|
|
|
|
|
|
|