minix/lib/libmenu/menu.c

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/* $NetBSD: menu.c,v 1.18 2012/12/30 12:27:09 blymn 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 without 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 <sys/cdefs.h>
__RCSID("$NetBSD: menu.c,v 1.18 2012/12/30 12:27:09 blymn Exp $");
#include <ctype.h>
#include <menu.h>
#include <string.h>
#include <stdlib.h>
#include "internals.h"
MENU _menui_default_menu = {
16, /* number of item rows that will fit in window */
1, /* number of columns of items that will fit in window */
0, /* number of rows of items we have */
0, /* number of columns of items we have */
0, /* current cursor row */
0, /* current cursor column */
{NULL, 0}, /* mark string */
{NULL, 0}, /* unmark string */
O_ONEVALUE, /* menu options */
NULL, /* the pattern buffer */
0, /* length of pattern buffer */
0, /* the length of matched buffer */
0, /* is the menu posted? */
A_REVERSE, /* menu foreground */
A_NORMAL, /* menu background */
A_UNDERLINE, /* unselectable menu item */
' ', /* filler between name and description */
NULL, /* user defined pointer */
0, /* top row of menu */
0, /* widest item in the menu */
0, /* the width of a menu column */
0, /* number of items attached to the menu */
NULL, /* items in the menu */
0, /* current menu item */
0, /* currently in a hook function */
NULL, /* function called when menu posted */
NULL, /* function called when menu is unposted */
NULL, /* function called when current item changes */
NULL, /* function called when current item changes */
NULL, /* the menu window */
NULL, /* the menu subwindow */
NULL, /* the window to write to */
};
/*
* Set the menu mark character
*/
int
set_menu_mark(MENU *m, char *mark)
{
MENU *menu = m;
if (m == NULL) menu = &_menui_default_menu;
/* if there was an old mark string, free it first */
if (menu->mark.string != NULL) free(menu->mark.string);
if ((menu->mark.string = (char *) malloc(strlen(mark) + 1)) == NULL)
return E_SYSTEM_ERROR;
strcpy(menu->mark.string, mark);
menu->mark.length = strlen(mark);
/* max item size may have changed - recalculate. */
_menui_max_item_size(menu);
return E_OK;
}
/*
* Return the menu mark string for the menu.
*/
char *
menu_mark(MENU *menu)
{
if (menu == NULL)
return _menui_default_menu.mark.string;
else
return menu->mark.string;
}
/*
* Set the menu unmark character
*/
int
set_menu_unmark(MENU *m, char *mark)
{
MENU *menu = m;
if (m == NULL) menu = &_menui_default_menu;
/* if there was an old mark string, free it first */
if (menu->unmark.string != NULL) free(menu->unmark.string);
if ((menu->unmark.string = (char *) malloc(strlen(mark) + 1)) == NULL)
return E_SYSTEM_ERROR;
strcpy(menu->unmark.string, mark);
menu->unmark.length = strlen(mark);
/* max item size may have changed - recalculate. */
_menui_max_item_size(menu);
return E_OK;
}
/*
* Return the menu unmark string for the menu.
*/
char *
menu_unmark(MENU *menu)
{
if (menu == NULL)
return _menui_default_menu.unmark.string;
else
return menu->unmark.string;
}
/*
* Set the menu window to the window passed.
*/
int
set_menu_win(MENU *menu, WINDOW *win)
{
if (menu == NULL) {
_menui_default_menu.menu_win = win;
_menui_default_menu.scrwin = win;
} else {
if (menu->posted == TRUE) {
return E_POSTED;
} else {
menu->menu_win = win;
menu->scrwin = win;
}
}
return E_OK;
}
/*
* Return the pointer to the menu window
*/
WINDOW *
menu_win(MENU *menu)
{
if (menu == NULL)
return _menui_default_menu.menu_win;
else
return menu->menu_win;
}
/*
* Set the menu subwindow for the menu.
*/
int
set_menu_sub(MENU *menu, WINDOW *sub)
{
if (menu == NULL) {
_menui_default_menu.menu_subwin = sub;
_menui_default_menu.scrwin = sub;
} else {
if (menu->posted == TRUE)
return E_POSTED;
menu->menu_subwin = sub;
menu->scrwin = sub;
}
return E_OK;
}
/*
* Return the subwindow pointer for the menu
*/
WINDOW *
menu_sub(MENU *menu)
{
if (menu == NULL)
return _menui_default_menu.menu_subwin;
else
return menu->menu_subwin;
}
/*
* Set the maximum number of rows and columns of items that may be displayed.
*/
int
set_menu_format(MENU *param_menu, int rows, int cols)
{
MENU *menu = (param_menu != NULL) ? param_menu : &_menui_default_menu;
menu->rows = rows;
menu->cols = cols;
if (menu->items != NULL)
/* recalculate the item neighbours */
return _menui_stitch_items(menu);
return E_OK;
}
/*
* Return the max number of rows and cols that may be displayed.
*/
void
menu_format(MENU *param_menu, int *rows, int *cols)
{
MENU *menu = (param_menu != NULL) ? param_menu : &_menui_default_menu;
*rows = menu->rows;
*cols = menu->cols;
}
/*
* Set the user defined function to call when a menu is posted.
*/
int
set_menu_init(MENU *menu, Menu_Hook func)
{
if (menu == NULL)
_menui_default_menu.menu_init = func;
else
menu->menu_init = func;
return E_OK;
}
/*
* Return the pointer to the menu init function.
*/
Menu_Hook
menu_init(MENU *menu)
{
if (menu == NULL)
return _menui_default_menu.menu_init;
else
return menu->menu_init;
}
/*
* Set the user defined function called when a menu is unposted.
*/
int
set_menu_term(MENU *menu, Menu_Hook func)
{
if (menu == NULL)
_menui_default_menu.menu_term = func;
else
menu->menu_term = func;
return E_OK;
}
/*
* Return the user defined menu termination function pointer.
*/
Menu_Hook
menu_term(MENU *menu)
{
if (menu == NULL)
return _menui_default_menu.menu_term;
else
return menu->menu_term;
}
/*
* Return the current menu options set.
*/
OPTIONS
menu_opts(MENU *menu)
{
if (menu == NULL)
return _menui_default_menu.opts;
else
return menu->opts;
}
/*
* Set the menu options to the given options.
*/
int
set_menu_opts(MENU *param_menu, OPTIONS opts)
{
int i, seen;
MENU *menu = (param_menu != NULL) ? param_menu : &_menui_default_menu;
OPTIONS old_opts = menu->opts;
menu->opts = opts;
/*
* If the radio option is selected then make sure only one
* item is actually selected in the items.
*/
if (((opts & O_RADIO) == O_RADIO) && (menu->items != NULL) &&
(menu->items[0] != NULL)) {
seen = 0;
for (i = 0; i < menu->item_count; i++) {
if (menu->items[i]->selected == 1) {
if (seen == 0) {
seen = 1;
} else {
menu->items[i]->selected = 0;
}
}
}
/* if none selected, select the first item */
if (seen == 0)
menu->items[0]->selected = 1;
}
if ((menu->opts & O_ROWMAJOR) != (old_opts & O_ROWMAJOR))
/* changed menu layout - need to recalc neighbours */
_menui_stitch_items(menu);
return E_OK;
}
/*
* Turn on the options in menu given by opts.
*/
int
menu_opts_on(MENU *param_menu, OPTIONS opts)
{
int i, seen;
MENU *menu = (param_menu != NULL) ? param_menu : &_menui_default_menu;
OPTIONS old_opts = menu->opts;
menu->opts |= opts;
/*
* If the radio option is selected then make sure only one
* item is actually selected in the items.
*/
if (((opts & O_RADIO) == O_RADIO) && (menu->items != NULL) &&
(menu->items[0] != NULL)) {
seen = 0;
for (i = 0; i < menu->item_count; i++) {
if (menu->items[i]->selected == 1) {
if (seen == 0) {
seen = 1;
} else {
menu->items[i]->selected = 0;
}
}
}
/* if none selected then select the top item */
if (seen == 0)
menu->items[0]->selected = 1;
}
if ((menu->items != NULL) &&
(menu->opts & O_ROWMAJOR) != (old_opts & O_ROWMAJOR))
/* changed menu layout - need to recalc neighbours */
_menui_stitch_items(menu);
return E_OK;
}
/*
* Turn off the menu options given in opts.
*/
int
menu_opts_off(MENU *param_menu, OPTIONS opts)
{
MENU *menu = (param_menu != NULL) ? param_menu : &_menui_default_menu;
OPTIONS old_opts = menu->opts;
menu->opts &= ~(opts);
if ((menu->items != NULL ) &&
(menu->opts & O_ROWMAJOR) != (old_opts & O_ROWMAJOR))
/* changed menu layout - need to recalc neighbours */
_menui_stitch_items(menu);
return E_OK;
}
/*
* Return the menu pattern buffer.
*/
char *
menu_pattern(MENU *menu)
{
if (menu == NULL)
return _menui_default_menu.pattern;
else
return menu->pattern;
}
/*
* Set the menu pattern buffer to pat and attempt to match the pattern in
* the item list.
*/
int
set_menu_pattern(MENU *param_menu, char *pat)
{
MENU *menu = (param_menu != NULL) ? param_menu : &_menui_default_menu;
char *p = pat;
/* check pattern is all printable characters */
while (*p)
if (!isprint((unsigned char) *p++)) return E_BAD_ARGUMENT;
if ((menu->pattern = (char *) realloc(menu->pattern,
sizeof(char) * strlen(pat) + 1)) == NULL)
return E_SYSTEM_ERROR;
strcpy(menu->pattern, pat);
menu->plen = strlen(pat);
/* search item list for pat here */
return _menui_match_items(menu, MATCH_FORWARD, &menu->cur_item);
}
/*
* Allocate a new menu structure and fill it in.
*/
MENU *
new_menu(ITEM **items)
{
MENU *the_menu;
char mark[2];
if ((the_menu = (MENU *)malloc(sizeof(MENU))) == NULL)
return NULL;
/* copy the defaults */
(void)memcpy(the_menu, &_menui_default_menu, sizeof(MENU));
/* set a default window if none already set. */
if (the_menu->menu_win == NULL)
the_menu->scrwin = stdscr;
/* make a private copy of the mark string */
if (_menui_default_menu.mark.string != NULL) {
if ((the_menu->mark.string =
(char *) malloc((unsigned) _menui_default_menu.mark.length + 1))
== NULL) {
free(the_menu);
return NULL;
}
strlcpy(the_menu->mark.string, _menui_default_menu.mark.string,
(unsigned) _menui_default_menu.mark.length + 1);
}
/* make a private copy of the unmark string too */
if (_menui_default_menu.unmark.string != NULL) {
if ((the_menu->unmark.string =
(char *) malloc((unsigned) _menui_default_menu.unmark.length + 1))
== NULL) {
free(the_menu);
return NULL;
}
strlcpy(the_menu->unmark.string,
_menui_default_menu.unmark.string,
(unsigned) _menui_default_menu.unmark.length+ 1 );
}
/* default mark needs to be set */
mark[0] = '-';
mark[1] = '\0';
set_menu_mark(the_menu, mark);
/* now attach the items, if any */
if (items != NULL) {
if(set_menu_items(the_menu, items) < 0) {
if (the_menu->mark.string != NULL)
free(the_menu->mark.string);
if (the_menu->unmark.string != NULL)
free(the_menu->unmark.string);
free(the_menu);
return NULL;
}
}
return the_menu;
}
/*
* Free up storage allocated to the menu object and destroy it.
*/
int
free_menu(MENU *menu)
{
int i;
if (menu == NULL)
return E_BAD_ARGUMENT;
if (menu->posted != 0)
return E_POSTED;
if (menu->pattern != NULL)
free(menu->pattern);
if (menu->mark.string != NULL)
free(menu->mark.string);
if (menu->items != NULL) {
/* disconnect the items from this menu */
for (i = 0; i < menu->item_count; i++) {
menu->items[i]->parent = NULL;
}
}
free(menu);
return E_OK;
}
/*
* Calculate the minimum window size for the menu.
*/
int
scale_menu(MENU *param_menu, int *rows, int *cols)
{
MENU *menu = (param_menu != NULL) ? param_menu : &_menui_default_menu;
if (menu->items == NULL)
return E_BAD_ARGUMENT;
/* calculate the max item size */
_menui_max_item_size(menu);
*rows = menu->rows;
*cols = menu->cols * menu->max_item_width;
/*
* allow for spacing between columns...
*/
*cols += (menu->cols - 1);
return E_OK;
}
/*
* Set the menu item list to the one given.
*/
int
set_menu_items(MENU *param_menu, ITEM **items)
{
MENU *menu = (param_menu != NULL) ? param_menu : &_menui_default_menu;
int i, new_count = 0, sel_count = 0;
/* don't change if menu is posted */
if (menu->posted == 1)
return E_POSTED;
/* count the new items and validate none are connected already */
while (items[new_count] != NULL) {
if ((items[new_count]->parent != NULL) &&
(items[new_count]->parent != menu))
return E_CONNECTED;
if (items[new_count]->selected == 1)
sel_count++;
new_count++;
}
/*
* don't allow multiple selected items if menu is radio
* button style.
*/
if (((menu->opts & O_RADIO) == O_RADIO) &&
(sel_count > 1))
return E_BAD_ARGUMENT;
/* if there were items connected then disconnect them. */
if (menu->items != NULL) {
for (i = 0; i < menu->item_count; i++) {
menu->items[i]->parent = NULL;
menu->items[i]->index = -1;
}
}
menu->item_count = new_count;
/* connect the new items to the menu */
for (i = 0; i < new_count; i++) {
items[i]->parent = menu;
items[i]->index = i;
}
menu->items = items;
menu->cur_item = 0; /* reset current item just in case */
menu->top_row = 0; /* and the top row too */
if (menu->pattern != NULL) { /* and the pattern buffer....sigh */
free(menu->pattern);
menu->plen = 0;
menu->match_len = 0;
}
/*
* make sure at least one item is selected on a radio
* button style menu.
*/
if (((menu->opts & O_RADIO) == O_RADIO) && (sel_count == 0))
menu->items[0]->selected = 1;
_menui_stitch_items(menu); /* recalculate the item neighbours */
return E_OK;
}
/*
* Return the pointer to the menu items array.
*/
ITEM **
menu_items(MENU *menu)
{
if (menu == NULL)
return _menui_default_menu.items;
else
return menu->items;
}
/*
* Return the count of items connected to the menu
*/
int
item_count(MENU *menu)
{
if (menu == NULL)
return _menui_default_menu.item_count;
else
return menu->item_count;
}
/*
* Set the menu top row to be the given row. The current item becomes the
* leftmost item on that row in the menu.
*/
int
set_top_row(MENU *param_menu, int row)
{
MENU *menu = (param_menu != NULL) ? param_menu : &_menui_default_menu;
int i, cur_item, state = E_SYSTEM_ERROR;
if (row > menu->item_rows)
return E_BAD_ARGUMENT;
if (menu->items == NULL)
return E_NOT_CONNECTED;
if (menu->in_init == 1)
return E_BAD_STATE;
cur_item = 0;
for (i = 0; i < menu->item_count; i++) {
/* search for first item that matches row - this will be
the current item. */
if (row == menu->items[i]->row) {
cur_item = i;
state = E_OK;
break; /* found what we want - no need to go further */
}
}
menu->in_init = 1; /* just in case we call the init/term routines */
if (menu->posted == 1) {
if (menu->menu_term != NULL)
menu->menu_term(menu);
if (menu->item_term != NULL)
menu->item_term(menu);
}
menu->cur_item = cur_item;
menu->top_row = row;
if (menu->posted == 1) {
if (menu->menu_init != NULL)
menu->menu_init(menu);
if (menu->item_init != NULL)
menu->item_init(menu);
}
menu->in_init = 0;
/* this should always be E_OK unless we are really screwed up */
return state;
}
/*
* Return the current top row number.
*/
int
top_row(MENU *param_menu)
{
MENU *menu = (param_menu != NULL) ? param_menu : &_menui_default_menu;
if (menu->items == NULL)
return E_NOT_CONNECTED;
return menu->top_row;
}
/*
* Position the cursor at the correct place in the menu.
*
*/
int
pos_menu_cursor(MENU *menu)
{
int movx, maxmark;
if (menu == NULL)
return E_BAD_ARGUMENT;
maxmark = max(menu->mark.length, menu->unmark.length);
movx = maxmark + (menu->items[menu->cur_item]->col
* (menu->col_width + 1));
if (menu->match_len > 0)
movx += menu->match_len - 1;
wmove(menu->scrwin,
menu->items[menu->cur_item]->row - menu->top_row, movx);
return E_OK;
}