/* Copyright (C) 2001-2023 Artifex Software, Inc.
   All Rights Reserved.

   This software is provided AS-IS with no warranty, either express or
   implied.

   This software is distributed under license and may not be copied,
   modified or distributed except as expressly authorized under the terms
   of the license contained in the file LICENSE in this distribution.

   Refer to licensing information at http://www.artifex.com or contact
   Artifex Software, Inc.,  39 Mesa Street, Suite 108A, San Francisco,
   CA 94129, USA, for further information.
*/


/* $Id:$ */
/* MS Windows implementation of gp_defaultpapersize */

#include <windows.h>
#include <string.h>
#include "gx.h"
#include "gp.h"

/* For compilation on Windows NT  */
#ifndef LOCALE_IPAPERSIZE
#  define LOCALE_IPAPERSIZE 0x100A
#endif

/* ------ Default paper size ------ */

/* Get the default paper size.  See gp_paper.h for details. */
int
gp_defaultpapersize(char *ptr, int *plen)
{
    char buf[6];
    char *paper = NULL;

    /* Determine the default paper size using the Windows locale.
     * LOCALE_IPAPERSIZE is only supported on Windows 2000 or later.
     */
#ifdef METRO
	paper = "letter";
#else
    if  (GetLocaleInfo(LOCALE_SYSTEM_DEFAULT, LOCALE_IPAPERSIZE,
            buf, sizeof(buf))) {
        int val = atoi(buf);
        if (val == 1)
            paper = "letter";
        else if (val == 5)
            paper = "legal";
        else if (val == 8)
            paper = "a3";
        else if (val == 9)
            paper = "a4";
    }

    /* Fall back to the default paper size method described in
     * http://msdn.microsoft.com/en-us/library/ms801585.aspx
     */
    if  ((paper == 0) &&
        GetLocaleInfo(LOCALE_SYSTEM_DEFAULT, LOCALE_ICOUNTRY,
            buf, sizeof(buf))) {
        int country = atoi(buf);
        if ((country == CTRY_UNITED_STATES) ||
            (country == CTRY_CANADA) ||
            ((country >= 50) && (country < 60) && (country != CTRY_BRAZIL)) ||
            ((country >= 500) && (country < 600)) ) {
            /* Imperial measurement system */
            paper = "letter";
        }
        else {
            /* Metric measurement system */
            paper = "a4";
        }
    }
#endif

    if (paper) {
        int len = strlen(paper);

        if (len < *plen) {
            /* string fits */
            strcpy(ptr, paper);
            *plen = len + 1;
            return 0;
        }
        /* string doesn't fit */
        *plen = len + 1;
        return -1;
    }

    /* No default paper size */

    if (*plen > 0)
        *ptr = 0;
    *plen = 1;
    return 1;
}