elk/lib/xwidgets/resource.c

/* resource.c
 *
 * $Id$
 *
 * Copyright 1990, 1991, 1992, 1993, 1994, 1995, Oliver Laumann, Berlin
 * Copyright 2002, 2003 Sam Hocevar <sam@zoy.org>, 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 "xt.h"

#include <ctype.h>

#define   XtRChar              "Char"
#define   XtRGC                "GC"
#define   XtRBackingStore      "BackingStore"

#define T_Unknown            -1
#define T_String_Or_Symbol   -2
#define T_Callbacklist       -3
#define T_Float              -4
#define T_Backing_Store      -5
#define T_Dimension          -6
#define T_Translations       -7
#define T_Position           -8
#define T_Bitmap             -9
#define T_Cardinal           -10
#define T_Accelerators       -11

static int Resource_To_Scheme_Type (register char *t) {
    if (streq (XtRAcceleratorTable, t))
        return T_Accelerators;
    else if (streq (XtRBackingStore, t))
        return T_Backing_Store;
    else if (streq (XtRBitmap, t))
        return T_Bitmap;
    else if (streq (XtRBoolean, t))
        return T_Boolean;
    else if (streq (XtRCallback, t))
        return T_Callbacklist;
    else if (streq (XtRCardinal, t))
        return T_Cardinal;
    else if (streq (XtRColormap, t))
        return T_Colormap;
    else if (streq (XtRCursor, t))
        return T_Cursor;
    else if (streq (XtRDimension, t))
        return T_Dimension;
    else if (streq (XtRDisplay, t))
        return T_Display;
    else if (streq (XtRFloat, t))
        return T_Float;
    else if (streq (XtRFont, t))
        return T_Font;
    else if (streq (XtRFontStruct, t))
        return T_Font;
    else if (streq (XtRGC, t))
        return T_Gc;
    else if (streq (XtRInt, t))
        return T_Fixnum;
    else if (streq (XtRPixel, t))
        return T_Pixel;
    else if (streq (XtRPixmap, t))
        return T_Pixmap;
    else if (streq (XtRPosition, t))
        return T_Position;
    else if (streq (XtRShort, t))
        return T_Fixnum;
    else if (streq (XtRString, t))
        return T_String_Or_Symbol;
    else if (streq (XtRTranslationTable, t))
        return T_Translations;
    else if (streq (XtRUnsignedChar, t))
        return T_Character;
    else if (streq (XtRChar, t))
        return T_Character;
    else if (streq (XtRWidget, t))
        return T_Widget;
    else if (streq (XtRWindow, t))
        return T_Window;
    return T_Unknown;
}

void Get_All_Resources (int sub, Widget w, WidgetClass c, XtResource **rp,
                        int *np, int *cp) {
    XtResource *r, *sr, *cr;
    int nr, snr = 0, cnr = 0;

    XtGetResourceList (c, &r, (Cardinal *)&nr);
    if (sub)
        Get_Sub_Resource_List (c, &sr, (Cardinal *)&snr);
    if (w && XtParent (w))
        XtGetConstraintResourceList (XtClass (XtParent (w)), &cr,
            (Cardinal *)&cnr);
    *np = nr + snr + cnr;
    *cp = cnr;
    *rp = (XtResource *)XtMalloc (*np * sizeof (XtResource));
    memcpy ((char *)*rp, (char *)r, nr * sizeof (XtResource));
    XtFree ((char *)r);
    if (snr)
        memcpy ((char *)(*rp + nr), (char *)sr, snr * sizeof (XtResource));
    if (cnr) {
        memcpy ((char *)(*rp + nr+snr), (char *)cr, cnr * sizeof (XtResource));
        XtFree ((char *)cr);
    }
}

void Convert_Args (int ac, Object *av, ArgList to, Widget widget,
                   WidgetClass class) {
    register char *name, *res;
    register int i, j, k;
    Object arg, val;
    XtResource *r;
    int nr, nc;
    int st, dt;
    char key[128];
    PFS2X converter;
    char *stmp;
    XrmValue src, dst;
    Alloca_Begin;

    if (ac & 1)
        Primitive_Error ("missing argument value");
    Get_All_Resources (1, widget, class, &r, &nr, &nc);
    /* Note:
     * `r' is not freed in case of error.
     */
    for (i = k = 0; k < ac; i++, k++) {
        arg = av[k];
        Get_Strsym_Stack (arg, name);
        Make_Resource_Name (name);
        for (j = 0; j < nr && !streq (name, r[j].resource_name); j++)
            ;
        if (j == nr)
            Primitive_Error ("no such resource: ~s", arg);
        if (streq (r[j].resource_class, XtCReadOnly))
            Primitive_Error ("resource is read-only: ~s", arg);
        res = r[j].resource_name;
        val = av[++k];
        st = TYPE(val);
        dt = Resource_To_Scheme_Type (r[j].resource_type);

        /* First look for widget class specific converter for
         * this resource, then look for a general converter
         * (first try the name of the resource, then the type):
         */
        if (widget && j >= nr-nc)
            class = XtClass (XtParent (widget));
        sprintf (key, "%s-%s", Class_Name (class), name);
        converter = Find_Converter_To_C (key);
        if (converter || (converter = Find_Converter_To_C (res))
                || (converter = Find_Converter_To_C (r[j].resource_type))) {
            XtArgVal ret = converter (val);
            XtSetArg (to[i], res, ret);
        } else if (dt == T_String_Or_Symbol) {
            Get_Strsym_Stack (val, stmp);
            XtSetArg (to[i], res, XtNewString (stmp));  /* Never freed! */
        } else if (dt == T_Callbacklist) {
            int n;
            XtCallbackList callbacks;

            Check_Callback_List (val);
            n = Fast_Length (val);
            callbacks = (XtCallbackRec *)  /* Never freed! */
                    XtMalloc ((n+1) * sizeof (XtCallbackRec));
            callbacks[n].callback = 0;
            callbacks[n].closure = 0;
            Fill_Callbacks (val, callbacks, n,
                Find_Callback_Converter (class, name, arg));
            XtSetArg (to[i], res, callbacks);
        } else if (dt == T_Float) {
            float f = (float)Get_Double (val);
            to[i].name = res;
            memcpy ((char *)&to[i].value, (char *)&f, sizeof f);
        } else if (dt == T_Dimension || dt == T_Position || dt == T_Cardinal
                || dt == T_Fixnum) {
            XtSetArg (to[i], res, Get_Integer (val));
        } else if (dt == T_Backing_Store) {
            XtSetArg (to[i], res, Symbols_To_Bits (val, 0,
                Backing_Store_Syms));
        } else if (dt == T_Translations) {
            XtSetArg (to[i], res, Get_Translations (val));
        } else if (dt == T_Accelerators) {
            XtSetArg (to[i], res, Get_Accelerators (val));
        } else if ((dt == T_Bitmap || dt == T_Pixmap) && EQ(val, Sym_None)) {
            XtSetArg (to[i], res, None);
        } else if (dt == T_Bitmap) {
            /* Should check depth here (must be 1), but how? */
            XtSetArg (to[i], res, Get_Pixmap (val));
        } else {
            if (st != dt) {
                char msg[128];

                /* Try to let XtConvert() do the conversion.
                 */
                if (widget && (st == T_String || st == T_Symbol)) {
                    Get_Strsym_Stack (val, stmp);
                    src.size = strlen (stmp);
                    src.addr = (caddr_t)stmp;
                    XtConvert (widget, (String)XtRString, &src,
                        r[j].resource_type, &dst);
                    if (dst.addr) {
                        if (dst.size == (sizeof (unsigned char))) {
                            XtSetArg (to[i], res, *(unsigned char *)dst.addr);
                        } else if (dst.size == sizeof (int)) {
                            XtSetArg (to[i], res, *(int *)dst.addr);
                        } else if (dst.size == sizeof (XtArgVal)) {
                            XtSetArg (to[i], res, *(XtArgVal *)dst.addr);
                        } else {
                            sprintf (msg,
                                "%s: converter for %s returned weird size %d",
                                name, r[j].resource_type, dst.size);
                            Primitive_Error (msg);
                        }
                        goto done;
                    }
                }
                sprintf (msg, "%s: can't convert %s ~s to %s", name,
                    Types[st].name, r[j].resource_type);
                Primitive_Error (msg, val);
            }
            if (dt == T_Boolean) {
                XtSetArg (to[i], res, EQ(val, True));
            } else if (dt == T_Colormap) {
                XtSetArg (to[i], res, COLORMAP(val)->cm);
            } else if (dt == T_Cursor) {
                XtSetArg (to[i], res, CURSOR(val)->cursor);
            } else if (dt == T_Display) {
                XtSetArg (to[i], res, DISPLAY(val)->dpy);
            } else if (dt == T_Font) {
                Open_Font_Maybe (val);
                if (streq (r[j].resource_type, XtRFontStruct))
                    XtSetArg (to[i], res, FONT(val)->info);
                else
                    XtSetArg (to[i], res, FONT(val)->id);
            } else if (dt == T_Pixel) {
                XtSetArg (to[i], res, PIXEL(val)->pix);
            } else if (dt == T_Pixmap) {
                XtSetArg (to[i], res, PIXMAP(val)->pm);
            } else if (dt == T_Gc) {
                XtSetArg (to[i], res, GCONTEXT(val)->gc);
            } else if (dt == T_Character) {
                XtSetArg (to[i], res, CHAR(val));
            } else if (dt == T_Widget) {
                XtSetArg (to[i], res, WIDGET(val)->widget);
            } else if (dt == T_Window) {
                XtSetArg (to[i], res, WINDOW(val)->win);
            } else Panic ("bad conversion type");
        }
done: ;
    }
    Alloca_End;
    XtFree ((char *)r);
}

Object Get_Values (Widget w, int ac, Object *av) {
    register char *name;
    register int i, j;
    Object arg;
    XtResource *r;
    int nr, nc;
    int t;
    ArgList argl;
    Object ret, tail;
    Display *dpy;
    char key[128];
    PFX2S converter;
    Widget w2;
    GC_Node2;
    Alloca_Begin;

    Alloca (argl, Arg*, ac * sizeof (Arg));
    Get_All_Resources (0, w, XtClass (w), &r, &nr, &nc);
    /* Note:
     * `r' is not freed in case of error.
     */
    for (i = 0; i < ac; i++) {
        XtArgVal argval;

        arg = av[i];
        Check_Type (arg, T_Symbol);
        Get_Strsym_Stack (arg, name);
        Make_Resource_Name (name);
        for (j = 0; j < nr && !streq (name, r[j].resource_name); j++)
            ;
        if (j == nr)
            Primitive_Error ("no such resource: ~s", arg);
        argl[i].name = name;
        Alloca (argval, XtArgVal, r[j].resource_size);
        argl[i].value = argval;
    }
    XtGetValues (w, argl, (Cardinal)ac);
    ret = tail = P_Make_List (Make_Integer (ac), Null);
    GC_Link2 (ret, tail);
    /*
     * Display is needed for resources like cursor and pixmap.
     * XtDisplayOfObject(w) is not necessarily the right one!
     */
    dpy = XtDisplayOfObject (w);
    for (i = 0; i < ac; i++, tail = Cdr (tail)) {
        Object o;
        XtArgVal val = argl[i].value;
        for (j = 0; j < nr && !streq (argl[i].name, r[j].resource_name); j++)
            ;
        t = Resource_To_Scheme_Type (r[j].resource_type);

        /* Look for a widget class specific converter, then for a
         * general converter (first try the resource name, then the type):
         */
        w2 = (j >= nr-nc) ? XtParent (w) : w;
        sprintf (key, "%s-%s", Class_Name (XtClass (w2)), argl[i].name);
        converter = Find_Converter_To_Scheme (key);

        if (converter) {
            o = converter (*(XtArgVal *)val);
        } else if ((converter = Find_Converter_To_Scheme (argl[i].name))) {
            o = converter (*(XtArgVal *)val);
        } else if ((converter = Find_Converter_To_Scheme (r[j].resource_type))) {
            o = converter (*(XtArgVal *)val);
        } else if (t == T_String_Or_Symbol) {
            char *s = *(char **)val;

            if (s == 0) s = "";
            o = Make_String (s, strlen (s));
        } else if (t == T_Callbacklist) {
            register int i, n;
            Object ret, tail;
            XtCallbackList callbacks = *(XtCallbackList *)val;
            GC_Node;

            for (n = 0; callbacks[n].callback; n++)
                ;
            ret = tail = P_Make_List (Make_Integer (n), Null);
            GC_Link2 (ret, tail);
            for (i = 0; i < n; i++, tail = Cdr (tail))
                Car (tail) = Get_Callbackfun (callbacks[i].closure);
            GC_Unlink;
            o = ret;
        } else if (t == T_Float) {
            o = Make_Reduced_Flonum ((double)*(float *)val);
        } else if (t == T_Backing_Store) {
            o = Bits_To_Symbols ((unsigned long)*(int *)val, 0,
                Backing_Store_Syms);
            if (Nullp (o))
                Primitive_Error ("invalid backing-store (Xt bug)");
        } else if (t == T_Boolean) {
            o = (Boolean)*(Boolean *)val ? True : False;
        } else if (t == T_Colormap) {
            o = Make_Colormap (0, dpy, *(Colormap *)val);
        } else if (t == T_Cursor) {
            o = Make_Cursor_Foreign (dpy, *(Cursor *)val);
        } else if (t == T_Gc) {
            o = Make_Gc (0, dpy, *(GC *)val);
        } else if (t == T_Dimension) {
            o = Make_Integer (*(Dimension *)val);
        } else if (t == T_Position) {
            o = Make_Integer (*(Position *)val);
        } else if (t == T_Cardinal) {
            o = Make_Unsigned (*(Cardinal *)val);
        } else if (t == T_Fixnum) {
            if (streq (r[j].resource_type, XtRInt))
                o = Make_Integer (*(int *)val);
            else
                o = Make_Integer (*(short *)val);
        } else if (t == T_Display) {
            o = Make_Display (0, dpy);
        } else if (t == T_Font) {
            if (streq (r[j].resource_type, XtRFontStruct)) {
                o = Make_Font_Foreign (dpy, False, (Font)0,
                        *(XFontStruct **)val);
            } else {
                XFontStruct *info;
                Disable_Interrupts;
                info = XQueryFont (dpy, *(Font *)val);
                Enable_Interrupts;
                o = Make_Font_Foreign (dpy, False, *(Font *)val, info);
            }
        } else if (t == T_Pixel) {
            o = Make_Pixel (*(unsigned long *)val);
        } else if (t == T_Pixmap || t == T_Bitmap) {
            o = Make_Pixmap_Foreign (dpy, *(Pixmap *)val);
        } else if (t == T_Character) {
            o = Make_Char (*(unsigned char *)val);
        } else if (t == T_Widget) {
            o = Make_Widget_Foreign (*(Widget *)val);
        } else if (t == T_Window) {
            o = Make_Window (0, dpy, *(Window *)val);
        } else {
            char s[128];

            sprintf (s, "%s: no converter for %s", argl[i].name,
                r[j].resource_type);
            Primitive_Error (s);
        }
        Car (tail) = o;
    }
    XtFree ((char *)r);
    GC_Unlink;
    return ret;
}

/* Convert `mapped-when-managed' to `mappedWhenManaged'.
 */
void Make_Resource_Name (register char *s) {
    register char *p;

    for (p = s; *s; ) {
        if (*s == '-') {
            if (*++s) {
                if (islower (*s))
                    *s = toupper (*s);
                *p++ = *s++;
            }
        } else *p++ = *s++;
    }
    *p = '\0';
}

Object Get_Resources (WidgetClass c, void (*fun)(), int freeit) {
    XtResource *r;
    register XtResource *p;
    int nr;
    Object ret, tail, tail2, x;
    GC_Node3;

    fun (c, &r, &nr);
    /* Note:
     * `r' is not freed in case of error.
     */
    ret = tail = tail2 = P_Make_List (Make_Integer (nr), Null);
    GC_Link3 (ret, tail, tail2);
    for (p = r; p < r+nr; p++, tail = Cdr (tail)) {
        x = tail2 = P_Make_List (Make_Integer (3), Null);
        Car (tail) = tail2 = x;
        x = Intern (p->resource_name);
        Car (tail2) = x; tail2 = Cdr (tail2);
        x = Intern (p->resource_class);
        Car (tail2) = x; tail2 = Cdr (tail2);
        x = Intern (p->resource_type);
        Car (tail2) = x;
    }
    GC_Unlink;
    if (freeit) XtFree ((char *)r);
    return ret;
}