/* util.c
 *
 * $Id$
 *
 * Copyright 1990, 1991, 1992, 1993, 1994, 1995, Oliver Laumann, Berlin
 * Copyright 2002, 2003 Sam Hocevar <sam@hocevar.net>, Paris
 *
 * This software was derived from Elk 1.2, which was Copyright 1987, 1988,
 * 1989, Nixdorf Computer AG and TELES GmbH, Berlin (Elk 1.2 has been written
 * by Oliver Laumann for TELES Telematic Services, Berlin, in a joint project
 * between TELES and Nixdorf Microprocessor Engineering, Berlin).
 *
 * Oliver Laumann, TELES GmbH, Nixdorf Computer AG and Sam Hocevar, as co-
 * owners or individual owners of copyright in this software, grant to any
 * person or company a worldwide, royalty free, license to
 *
 *    i) copy this software,
 *   ii) prepare derivative works based on this software,
 *  iii) distribute copies of this software or derivative works,
 *   iv) perform this software, or
 *    v) display this software,
 *
 * provided that this notice is not removed and that neither Oliver Laumann
 * nor Teles nor Nixdorf are deemed to have made any representations as to
 * the suitability of this software for any purpose nor are held responsible
 * for any defects of this software.
 *
 * THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
 */

#include "xlib.h"

#include <string.h>

static Object P_Get_Default (Object d, Object program, Object option) {
    register char *ret;

    Check_Type (d, T_Display);
    ret = XGetDefault (DISPLAY(d)->dpy, Get_Strsym (program),
                       Get_Strsym (option));
    if (ret)
        return Make_String (ret, strlen (ret));
    return False;
}

static Object P_Resource_Manager_String (Object d) {
    register char *ret;

    Check_Type (d, T_Display);
    ret = XResourceManagerString (DISPLAY(d)->dpy);
    return ret ? Make_String (ret, strlen (ret)) : False;
}

static Object P_Parse_Geometry (Object string) {
    Object ret, t;
    register int mask;
    int x, y;
    unsigned w, h;

    mask = XParseGeometry (Get_Strsym (string), &x, &y, &w, &h);
    t = ret = P_Make_List (Make_Integer (6), False);
    if (mask & XNegative) Car (t) = True; t = Cdr (t);
    if (mask & YNegative) Car (t) = True; t = Cdr (t);
    if (mask & XValue) Car (t) = Make_Integer (x); t = Cdr (t);
    if (mask & YValue) Car (t) = Make_Integer (y); t = Cdr (t);
    if (mask & WidthValue) Car (t) = Make_Unsigned (w); t = Cdr (t);
    if (mask & HeightValue) Car (t) = Make_Unsigned (h);
    return ret;
}

static Object P_Parse_Color (Object d, Object cmap, Object spec) {
    XColor ret;

    Check_Type (d, T_Display);
    if (XParseColor (DISPLAY(d)->dpy, Get_Colormap (cmap), Get_Strsym (spec),
            &ret))
        return Make_Color (ret.red, ret.green, ret.blue);
    return False;
}

void elk_init_xlib_util () {
    Define_Primitive (P_Get_Default,       "get-default",         3, 3, EVAL);
    Define_Primitive (P_Resource_Manager_String,
                        "resource-manager-string",                1, 1, EVAL);
    Define_Primitive (P_Parse_Geometry,    "parse-geometry",      1, 1, EVAL);
    Define_Primitive (P_Parse_Color,       "parse-color",         3, 3, EVAL);
}