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/*
* cook - file construction tool
* Copyright (C) 1997, 1998, 2003 Peter Miller;
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
*
* MANIFEST: functions to manipulate pages
*/
#include <ac/stdlib.h>
#include <ac/sys/ioctl.h>
#include <ac/termios.h>
#include <arglex.h>
#include <error_intl.h>
#include <help.h>
#include <page.h>
#define MIN_PAGE_WIDTH 40
/* MAX_PAGE_WIDTH is defined in common/page.h */
#define DEFAULT_PAGE_WIDTH 80
#define MIN_PAGE_LENGTH 10
#define MAX_PAGE_LENGTH 30000
#define DEFAULT_PAGE_LENGTH 24
static int page_length;
static int page_width;
static void default_page_sizes _((void));
static void
default_page_sizes()
{
if (!page_width)
{
char *cp;
cp = getenv("COLS");
if (cp)
{
int n;
n = atoi(cp);
if (n > 0)
{
if (n < MIN_PAGE_WIDTH)
n = MIN_PAGE_WIDTH;
if (n > MAX_PAGE_WIDTH)
n = MAX_PAGE_WIDTH;
page_width = n;
}
}
}
if (!page_length)
{
char *cp;
cp = getenv("LINES");
if (cp)
{
int n;
n = atoi(cp);
if (n > 0)
{
if (n < MIN_PAGE_LENGTH)
n = MIN_PAGE_LENGTH;
if (n > MAX_PAGE_LENGTH)
n = MAX_PAGE_LENGTH;
page_length = n;
}
}
}
#ifdef TIOCGWINSZ
if (!page_width || !page_length)
{
struct winsize ws;
if (ioctl(0, TIOCGWINSZ, &ws) == 0)
{
if (!page_width && ws.ws_col > 0)
{
page_width = ws.ws_col;
if (page_width < MIN_PAGE_WIDTH)
page_width = MIN_PAGE_WIDTH;
if (page_width > MAX_PAGE_WIDTH)
page_width = MAX_PAGE_WIDTH;
}
if (!page_length && ws.ws_row > 0)
{
page_length = ws.ws_row;
if (page_length < MIN_PAGE_LENGTH)
page_length = MIN_PAGE_LENGTH;
if (page_length > MAX_PAGE_LENGTH)
page_length = MAX_PAGE_LENGTH;
}
}
}
#endif
if (!page_width)
page_width = DEFAULT_PAGE_WIDTH;
if (!page_length)
page_length = DEFAULT_PAGE_LENGTH;
}
void
page_width_set(n)
int n;
{
sub_context_ty *scp;
if (page_width)
{
arg_duplicate(arglex_token_page_width, 0);
/* NOTREACHED */
}
if (n < MIN_PAGE_WIDTH || n > MAX_PAGE_WIDTH)
{
scp = sub_context_new();
sub_var_set(scp, "Number", "%d", n);
fatal_intl(scp, i18n("page width $number out of range"));
/* NOTREACHED */
}
page_width = n;
}
int
page_width_get()
{
/*
* must not generate a fatal error in this function,
* as it is used by 'error.c' when reporting fatal errors.
*
* must not put tracing in this function,
* because 'trace.c' uses it to determine the width.
*/
if (!page_width)
default_page_sizes();
return page_width;
}
void
page_length_set(n)
int n;
{
sub_context_ty *scp;
if (page_length)
{
arg_duplicate(arglex_token_page_length, 0);
/* NOTREACHED */
}
if (n < MIN_PAGE_LENGTH || n > MAX_PAGE_LENGTH)
{
scp = sub_context_new();
sub_var_set(scp, "Number", "%d", n);
fatal_intl(scp, i18n("page length $number out of range"));
/* NOTREACHED */
}
page_length = n;
}
int
page_length_get()
{
if (!page_length)
default_page_sizes();
return page_length;
}
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