* Fix: Convert DOS lineends to Unix.

1 files changed, 824 insertions, 824 deletions

diff --git a/macosx/tkMacOSXKeyboard.c b/macosx/tkMacOSXKeyboard.c
index c79a2d0..f1c2f12 100644
--- a/macosx/tkMacOSXKeyboard.c
+++ b/macosx/tkMacOSXKeyboard.c
@@ -1,824 +1,824 @@
-/* 

- * tkMacOSXKeyboard.c --

- *

- *      Routines to support keyboard events on the Macintosh.

- *

- * Copyright (c) 1995-1997 Sun Microsystems, Inc.

- * Copyright 2001, Apple Computer, Inc.

- *

- * See the file "license.terms" for information on usage and redistribution

- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.

- *

- * RCS: @(#) $Id: tkMacOSXKeyboard.c,v 1.15 2004/02/07 16:21:08 cc_benny Exp $

- */

-

-#include "tkInt.h"

-#include "X11/Xlib.h"

-#include "X11/keysym.h"

-#include <Carbon/Carbon.h>

-#include "tkMacOSXInt.h"

-#include "tkMacOSXEvent.h"      /* TkMacOSXKeycodeToUnicode() FIXME: That

-                                 * function should probably move here. */

-

-/*

- * A couple of simple definitions to make code a bit more self-explaining.

- *

- * For the assignments of Mod1==alt==command and Mod2==meta==option, see also

- * tkMacOSXMouseEvent.c.

- */

-

-#define LATIN1_MAX       255

-#define MAC_KEYCODE_MAX  0x7F

-#define MAC_KEYCODE_MASK 0x7F

-#define ALT_MASK         Mod1Mask

-#define OPTION_MASK      Mod2Mask

-

-

-/*

- * Tables enumerating the special keys defined on Mac keyboards.  These are

- * necessary for correct keysym mappings for all keys where the keysyms are

- * not identical with their ASCII or Latin-1 code points.

- */

-

-typedef struct {

-    int keycode;                /* Macintosh keycode. */

-    KeySym keysym;              /* X windows keysym. */

-} KeyInfo;

-

-/*

- * Notes on keyArray:

- *

- * 0x34, XK_Return - Powerbooks use this and some keymaps define it.

- *

- * 0x4C, XK_Return - XFree86 and Apple's X11 call this one XK_KP_Enter.

- *

- * 0x47, XK_Clear - This key is NumLock when used on PCs, but Mac

- * applications don't use it like that, nor does Apple's X11.

- *

- * All other keycodes are taken from the published ADB keyboard layouts.

- */

-

-static KeyInfo keyArray[] = {

-    {0x24,      XK_Return},

-    {0x30,      XK_Tab},

-    {0x33,      XK_BackSpace},

-    {0x34,      XK_Return},

-    {0x35,      XK_Escape},

-

-    {0x47,      XK_Clear},

-    {0x4C,      XK_Return},

-

-    {0x72,      XK_Help},

-    {0x73,      XK_Home},

-    {0x74,      XK_Page_Up},

-    {0x75,      XK_Delete},

-    {0x77,      XK_End},

-    {0x79,      XK_Page_Down},

-

-    {0x7B,      XK_Left},

-    {0x7C,      XK_Right},

-    {0x7D,      XK_Down},

-    {0x7E,      XK_Up},

-

-    {0,         0}

-};

-

-static KeyInfo virtualkeyArray[] = {

-    {122,       XK_F1},

-    {120,       XK_F2},

-    {99,        XK_F3},

-    {118,       XK_F4},

-    {96,        XK_F5},

-    {97,        XK_F6},

-    {98,        XK_F7},

-    {100,       XK_F8},

-    {101,       XK_F9},

-    {109,       XK_F10},

-    {103,       XK_F11},

-    {111,       XK_F12},

-    {105,       XK_F13},

-    {107,       XK_F14},

-    {113,       XK_F15},

-    {0,         0}

-};

-

-static int initialized = 0;

-static Tcl_HashTable keycodeTable;      /* keyArray hashed by keycode value. */

-static Tcl_HashTable vkeyTable;         /* virtualkeyArray hashed by virtual

-                                         * keycode value. */

-

-static int latin1Table[LATIN1_MAX+1];   /* Reverse mapping table for

-                                         * controls, ASCII and Latin-1.  */

-

-/*

- * Prototypes for static functions used in this file.

- */

-

-static void     InitKeyMaps (void);

-static void     InitLatin1Table(Display *display);

-static int      XKeysymToMacKeycode(Display *display, KeySym keysym);

-

-

-/*

- *----------------------------------------------------------------------

- *

- * InitKeyMaps --

- *

- *      Creates hash tables used by some of the functions in this file.

- *

- *      FIXME: As keycodes are defined to be in the limited range 0-127, it

- *      would be easier and more efficient to use directly initialized plain

- *      arrays and drop this function.

- *

- * Results:

- *      None.

- *

- * Side effects:

- *      Allocates memory & creates some hash tables.

- *

- *----------------------------------------------------------------------

- */

-

-static void

-InitKeyMaps()

-{

-    Tcl_HashEntry *hPtr;

-    KeyInfo *kPtr;

-    int dummy;

-                

-    Tcl_InitHashTable(&keycodeTable, TCL_ONE_WORD_KEYS);

-    for (kPtr = keyArray; kPtr->keycode != 0; kPtr++) {

-        hPtr = Tcl_CreateHashEntry(&keycodeTable, (char *) kPtr->keycode,

-                &dummy);

-        Tcl_SetHashValue(hPtr, kPtr->keysym);

-    }

-    Tcl_InitHashTable(&vkeyTable, TCL_ONE_WORD_KEYS);

-    for (kPtr = virtualkeyArray; kPtr->keycode != 0; kPtr++) {

-        hPtr = Tcl_CreateHashEntry(&vkeyTable, (char *) kPtr->keycode,

-                &dummy);

-        Tcl_SetHashValue(hPtr, kPtr->keysym);

-    }

-    initialized = 1;

-}

-

-/*

- *----------------------------------------------------------------------

- *

- * InitLatin1Table --

- *

- *      Creates a simple table to be used for mapping from keysyms to

- *      keycodes.  Always needs to be called before using latin1Table,

- *      because the keyboard layout may have changed, and than the table must

- *      be re-computed.

- *

- * Results:

- *      None.

- *

- * Side effects:

- *      Sets the global latin1Table.

- *

- *----------------------------------------------------------------------

- */

-

-static void

-InitLatin1Table(

-    Display *display)

-{

-    static Boolean latin1_initialized = false;

-    static SInt16 lastKeyLayoutID = -1;

-

-    SInt16 keyScript;

-    SInt16 keyLayoutID;

-

-    keyScript = GetScriptManagerVariable(smKeyScript);

-    keyLayoutID = GetScriptVariable(keyScript,smScriptKeys);

-

-    if (!latin1_initialized || (lastKeyLayoutID != keyLayoutID)) {

-        int keycode;

-        KeySym keysym;

-        int state;

-        int modifiers;

-

-        latin1_initialized = true;

-        lastKeyLayoutID = keyLayoutID;

-

-        memset(latin1Table, 0, sizeof(latin1Table));

-        

-        /*

-         * In the common X11 implementations, a keymap has four columns

-         * "plain", "Shift", "Mode_switch" and "Mode_switch + Shift".  We

-         * don't use "Mode_switch", but we use "Option" instead.  (This is

-         * similar to Apple's X11 implementation, where "Mode_switch" is used

-         * as an alias for "Option".)

-         *

-         * So here we go through all 4 columns of the keymap and find all

-         * Latin-1 compatible keycodes.  We go through the columns

-         * back-to-front from the more exotic columns to the more simple, so

-         * that simple keycode-modifier combinations are preferred in the

-         * resulting table.

-         */

-

-        for (state = 3; state >= 0; state--) {

-            modifiers = 0;

-            if (state & 1) {

-                modifiers |= shiftKey;

-            }

-            if (state & 2) {

-                modifiers |= optionKey;

-            }

-

-            for (keycode = 0; keycode <= MAC_KEYCODE_MAX; keycode++) {

-                keysym = XKeycodeToKeysym(display,keycode<<16,state);

-                if (keysym <= LATIN1_MAX) {

-                    latin1Table[keysym] = keycode | modifiers;

-                }

-            }

-        }

-    }

-}

-

-/*

- *----------------------------------------------------------------------

- *

- * XKeycodeToKeysym --

- *

- *      Translate from a system-dependent keycode to a system-independent

- *      keysym.

- *

- * Results:

- *      Returns the translated keysym, or NoSymbol on failure.

- *

- * Side effects:

- *      None.

- *

- *----------------------------------------------------------------------

- */

-

-KeySym 

-XKeycodeToKeysym(

-    Display* display,

-    KeyCode keycode,

-    int index)

-{

-    register Tcl_HashEntry *hPtr;

-    int newKeycode;

-    UniChar newChar;

-

-    (void) display; /*unused*/

-

-    if (!initialized) {

-        InitKeyMaps();

-    }

-

-    /*

-     * When determining what keysym to produce we first check to see if the

-     * key is a function key.  We then check to see if the character is

-     * another non-printing key.  Finally, we return the key syms for all

-     * ASCII and Latin-1 chars.

-     */

-

-    newKeycode = keycode >> 16;

-

-    if ((keycode & 0xFFFF) == 0x10) {

-        hPtr = Tcl_FindHashEntry(&vkeyTable, (char *) newKeycode);

-        if (hPtr != NULL) {

-            return (KeySym) Tcl_GetHashValue(hPtr);

-        }

-    }

-    hPtr = Tcl_FindHashEntry(&keycodeTable, (char *) newKeycode);

-    if (hPtr != NULL) {

-        return (KeySym) Tcl_GetHashValue(hPtr);

-    }

-

-    /* 

-     * Add in the Mac modifier flags for shift and option.

-     */

-

-    if (index & 1) {

-        newKeycode |= shiftKey;

-    }

-    if (index & 2) {

-        newKeycode |= optionKey;

-    }

-

-    newChar = 0;

-    TkMacOSXKeycodeToUnicode(

-        &newChar, 1, kEventRawKeyDown,

-        newKeycode & 0x00FF, newKeycode & 0xFF00, NULL);

-

-    /*

-     * X11 keysyms are identical to Unicode for ASCII and Latin-1.  Give up

-     * for other characters for now.

-     */

-

-    if ((newChar >= XK_space) && (newChar <= LATIN1_MAX)) {

-        return newChar;

-    }

-

-    return NoSymbol; 

-}

-

-/*

- *----------------------------------------------------------------------

- *

- * TkpGetString --

- *

- *      Retrieve the string equivalent for the given keyboard event.

- *

- * Results:

- *      Returns the UTF string.

- *

- * Side effects:

- *      None.

- *

- *----------------------------------------------------------------------

- */

-

-char *

-TkpGetString(

-    TkWindow *winPtr,           /* Window where event occurred: Needed to get

-                                 * input context. */

-    XEvent *eventPtr,           /* X keyboard event. */

-    Tcl_DString *dsPtr)         /* Uninitialized or empty string to hold

-                                 * result. */

-{

-    (void) winPtr; /*unused*/

-    Tcl_DStringInit(dsPtr);

-    return Tcl_DStringAppend(dsPtr, eventPtr->xkey.trans_chars, -1);

-}

-

-/*

- *----------------------------------------------------------------------

- *

- * XGetModifierMapping --

- *

- *      Fetch the current keycodes used as modifiers.

- *

- * Results:

- *      Returns a new modifier map.

- *

- * Side effects:

- *      Allocates a new modifier map data structure.

- *

- *----------------------------------------------------------------------

- */

-

-XModifierKeymap * 

-XGetModifierMapping(

-    Display* display)

-{ 

-    XModifierKeymap * modmap;

-

-    (void) display; /*unused*/

-

-    /*

-     * MacOSX doesn't use the key codes for the modifiers for anything, and

-     * we don't generate them either.  So there is no modifier map.

-     */

-

-    modmap = (XModifierKeymap *) ckalloc(sizeof(XModifierKeymap));

-    modmap->max_keypermod = 0;

-    modmap->modifiermap = NULL;

-    return modmap;

-}

-

-/*

- *----------------------------------------------------------------------

- *

- * XFreeModifiermap --

- *

- *      Deallocate a modifier map that was created by XGetModifierMapping.

- *

- * Results:

- *      None.

- *

- * Side effects:

- *      Frees the datastructure referenced by modmap.

- *

- *----------------------------------------------------------------------

- */

-

-void 

-XFreeModifiermap(

-    XModifierKeymap *modmap)

-{

-    if (modmap->modifiermap != NULL) {

-        ckfree((char *) modmap->modifiermap);

-    }

-    ckfree((char *) modmap);

-}

-

-/*

- *----------------------------------------------------------------------

- *

- * XKeysymToString, XStringToKeysym --

- *

- *      These X window functions map keysyms to strings & strings to keysyms.

- *      However, Tk already does this for the most common keysyms.

- *      Therefore, these functions only need to support keysyms that will be

- *      specific to the Macintosh.  Currently, there are none.

- *

- * Results:

- *      None.

- *

- * Side effects:

- *      None.

- *

- *----------------------------------------------------------------------

- */

-

-char * 

-XKeysymToString(

-    KeySym keysym)

-{

-    return NULL; 

-}

-

-KeySym 

-XStringToKeysym(

-    const char* string)

-{ 

-    return NoSymbol;

-}

-

-/*

- *----------------------------------------------------------------------

- *

- * XKeysymToMacKeycode --

- *

- *      An internal function like XKeysymToKeycode but only generating the

- *      Mac specific keycode plus the modifiers Shift and Option.

- *

- * Results:

- *      A Mac keycode with the actual keycode in the low byte and Mac-style

- *      modifier bits in the high byte.

- *

- * Side effects:

- *      None.

- *

- *----------------------------------------------------------------------

- */

-

-static int

-XKeysymToMacKeycode(

-    Display *display,

-    KeySym keysym)

-{

-    if (keysym <= LATIN1_MAX) {

-

-        /*

-         * Handle keysyms in the Latin-1 range where keysym and Unicode

-         * character code point are the same.

-         */

-

-        InitLatin1Table(display);

-        return latin1Table[keysym];

-

-    } else {

-

-        /*

-         * Handle special keys from our exception tables.  Don't mind if this

-         * is slow, neither the test suite nor [event generate] need to be

-         * optimized (we hope).

-         */

-

-        KeyInfo *kPtr;

-                

-        for (kPtr = keyArray; kPtr->keycode != 0; kPtr++) {

-            if (kPtr->keysym == keysym) {

-                return kPtr->keycode;

-            }

-        }

-        for (kPtr = virtualkeyArray; kPtr->keycode != 0; kPtr++) {

-            if (kPtr->keysym == keysym) {

-                return kPtr->keycode;

-            }

-        }

-

-        /*

-         * For other keysyms (not Latin-1 and not special keys), we'd need a

-         * generic keysym-to-unicode table.  We don't have that, so we give

-         * up here.

-         */

-

-        return 0;

-    }

-}

-

-/*

- *----------------------------------------------------------------------

- *

- * XKeysymToKeycode --

- *

- *      The function XKeysymToKeycode takes an X11 keysym and converts it

- *      into a Mac keycode.  It is in the stubs table for compatibility but

- *      not used anywhere in the core.

- *

- * Results:

- *      A 32 bit keycode with the the mac keycode (without modifiers) in the

- *      higher 16 bits of the keycode and the ASCII or Latin-1 code in the

- *      lower 8 bits of the keycode.

- *

- * Side effects:

- *      None.

- *

- *----------------------------------------------------------------------

- */

-

-KeyCode

-XKeysymToKeycode(

-    Display* display,

-    KeySym keysym)

-{

-    int macKeycode = XKeysymToMacKeycode(display, keysym);

-    KeyCode result;

-    

-    /*

-     * See also TkpSetKeycodeAndState.  The 0x0010 magic is used in

-     * XKeycodeToKeysym.  For special keys like XK_Return the lower 8 bits of

-     * the keysym are usually a related ASCII control code.

-     */

-

-    if ((keysym >= XK_F1) && (keysym <= XK_F35)) {

-        result = 0x0010;

-    } else {

-        result = 0x00FF & keysym;

-    }

-    result |= (macKeycode & MAC_KEYCODE_MASK) << 16;

-

-    return result;

-}

-

-/*

-NB: Keep this commented code for a moment for reference.

-

-    if ((keysym >= XK_space) && (XK_asciitilde)) {

-        if (keysym == 'a') {

-            virtualKeyCode = 0x00;

-        } else if (keysym == 'b' || keysym == 'B') {

-            virtualKeyCode = 0x0B;

-        } else if (keysym == 'c') {

-            virtualKeyCode = 0x08;

-        } else if (keysym == 'x' || keysym == 'X') {

-            virtualKeyCode = 0x07;

-        } else if (keysym == 'z') {

-            virtualKeyCode = 0x06;

-        } else if (keysym == ' ') {

-            virtualKeyCode = 0x31;

-        } else if (keysym == XK_Return) {

-            virtualKeyCode = 0x24;

-            keysym = '\r';

-        }

-        keycode = keysym + (virtualKeyCode <<16);

-    }

-

-    return keycode;

-*/

-

-/*

- *----------------------------------------------------------------------

- *

- * TkpSetKeycodeAndState --

- *

- *      The function TkpSetKeycodeAndState takes a keysym and fills in the

- *      appropriate members of an XEvent.  It is similar to XKeysymToKeycode,

- *      but it also sets the modifier mask in the XEvent.  It is used by

- *      [event generate] and it is in the stubs table.

- *

- * Results:

- *      Fills an XEvent, sets the member xkey.keycode with a keycode

- *      formatted the same as XKeysymToKeycode and the member xkey.state with

- *      the modifiers implied by the keysym.  Also fills in xkey.trans_chars,

- *      so that the actual characters can be retrieved later.

- *

- * Side effects:

- *      None.

- *

- *----------------------------------------------------------------------

- */

-

-void

-TkpSetKeycodeAndState(

-    Tk_Window tkwin,

-    KeySym keysym,

-    XEvent *eventPtr)

-{

-    if (keysym == NoSymbol) {

-        eventPtr->xkey.keycode = 0;

-    } else {

-        Display *display = Tk_Display(tkwin);

-        int macKeycode = XKeysymToMacKeycode(display, keysym);

-

-        /*

-         * See also XKeysymToKeycode.

-         */

-

-        if ((keysym >= XK_F1) && (keysym <= XK_F35)) {

-            eventPtr->xkey.keycode = 0x0010;

-        } else {

-            eventPtr->xkey.keycode = 0x00FF & keysym;

-        }

-        eventPtr->xkey.keycode |= (macKeycode & MAC_KEYCODE_MASK) << 16;

-

-        if (shiftKey & macKeycode) {

-            eventPtr->xkey.state |= ShiftMask;

-        }

-        if (optionKey & macKeycode) {

-            eventPtr->xkey.state |= OPTION_MASK;

-        }

-

-        if (keysym <= LATIN1_MAX) {

-            int done;

-            done = Tcl_UniCharToUtf(keysym,eventPtr->xkey.trans_chars);

-            eventPtr->xkey.trans_chars[done] = 0;

-        } else {

-            eventPtr->xkey.trans_chars[0] = 0;

-        }

-    }

-}

-

-/*

- *----------------------------------------------------------------------

- *

- * TkpGetKeySym --

- *

- *      Given an X KeyPress or KeyRelease event, map the keycode in the event

- *      into a keysym.

- *

- * Results:

- *      The return value is the keysym corresponding to eventPtr, or NoSymbol

- *      if no matching keysym could be found.

- *

- * Side effects:

- *      In the first call for a given display, keycode-to-keysym maps get

- *      loaded.

- *

- *----------------------------------------------------------------------

- */

-

-KeySym

-TkpGetKeySym(

-    TkDisplay *dispPtr,         /* Display in which to map keycode. */

-    XEvent *eventPtr)           /* Description of X event. */

-{

-    KeySym sym;

-    int index;

-

-    /*

-     * Refresh the mapping information if it's stale.

-     */

-

-    if (dispPtr->bindInfoStale) {

-        TkpInitKeymapInfo(dispPtr);

-    }

-

-    /*

-     * Handle pure modifier keys specially.  We use -1 as a signal for

-     * this.

-     */

-

-    if (eventPtr->xany.send_event == -1) {

-        int modifier = eventPtr->xkey.keycode;

-        if (modifier == cmdKey) {

-            return XK_Alt_L;

-        } else if (modifier == shiftKey) {

-            return XK_Shift_L;

-        } else if (modifier == alphaLock) {

-            return XK_Caps_Lock;

-        } else if (modifier == optionKey) {

-            return XK_Meta_L;

-        } else if (modifier == controlKey) {

-            return XK_Control_L;

-        } else if (modifier == rightShiftKey) {

-            return XK_Shift_R;

-        } else if (modifier == rightOptionKey) {

-            return XK_Meta_R;

-        } else if (modifier == rightControlKey) {

-            return XK_Control_R;

-        } else {

-

-            /*

-             * If we get here, we probably need to implement something new.

-             */

-

-            return NoSymbol;

-        } 

-    }

-

-    /*

-     * Figure out which of the four slots in the keymap vector to use for

-     * this key.  Refer to Xlib documentation for more info on how this

-     * computation works.  (Note: We use "Option" in keymap columns 2 and 3

-     * where other implementations have "Mode_switch".)

-     */

-

-    index = 0;

-

-    /*

-     * We want Option key combinations to use their base chars as keysyms, so

-     * we ignore the option modifier here.

-     */

-

-#if 0

-    if (eventPtr->xkey.state & OPTION_MASK) {

-        index |= 2;

-    }

-#endif

-

-    if ((eventPtr->xkey.state & ShiftMask)

-            || (/* (dispPtr->lockUsage != LU_IGNORE)

-                   && */ (eventPtr->xkey.state & LockMask))) {

-        index |= 1;

-    }

-

-    /*

-     * First try of the actual translation.

-     */

-

-    sym = XKeycodeToKeysym(dispPtr->display, eventPtr->xkey.keycode, index);

-

-    /*

-     * Special handling: If the key was shifted because of Lock, but lock is

-     * only caps lock, not shift lock, and the shifted keysym isn't

-     * upper-case alphabetic, then switch back to the unshifted keysym.

-     */

-

-    if ((index & 1) && !(eventPtr->xkey.state & ShiftMask)

-            /*&& (dispPtr->lockUsage == LU_CAPS)*/ ) {

-

-        /*

-         * FIXME: Keysyms are only identical to Unicode for ASCII and

-         * Latin-1, so we can't use Tcl_UniCharIsUpper() for keysyms outside

-         * that range.  This may be a serious problem here.

-         */

-

-        if ((sym == NoSymbol) || (sym > LATIN1_MAX)

-                || !Tcl_UniCharIsUpper(sym)) {

-            index &= ~1;

-            sym = XKeycodeToKeysym(dispPtr->display, eventPtr->xkey.keycode,

-                    index);

-        }

-    }

-

-    /*

-     * Another bit of special handling: If this is a shifted key and there is

-     * no keysym defined, then use the keysym for the unshifted key.

-     */

-

-    if ((index & 1) && (sym == NoSymbol)) {

-        sym = XKeycodeToKeysym(dispPtr->display, eventPtr->xkey.keycode,

-                index & ~1);

-    }

-    return sym;

-}

-

-/*

- *--------------------------------------------------------------

- *

- * TkpInitKeymapInfo --

- *

- *      This procedure is invoked to scan keymap information to recompute

- *      stuff that's important for binding, such as the modifier key (if any)

- *      that corresponds to the "Mode_switch" keysym.

- *

- * Results:

- *      None.

- *

- * Side effects:

- *      Keymap-related information in dispPtr is updated.

- *

- *--------------------------------------------------------------

- */

-

-void

-TkpInitKeymapInfo(

-    TkDisplay *dispPtr)         /* Display for which to recompute keymap

-                                 * information. */

-{

-    dispPtr->bindInfoStale = 0;

-

-    /*

-     * Behaviours that are variable on X11 are defined constant on MacOSX.

-     * lockUsage is only used above in TkpGetKeySym(), nowhere else

-     * currently.  There is no offical "Mode_switch" key.

-     */

-

-    dispPtr->lockUsage = LU_CAPS;

-    dispPtr->modeModMask = 0;

-    dispPtr->altModMask = ALT_MASK;

-    dispPtr->metaModMask = OPTION_MASK;

-

-    /*

-     * MacOSX doesn't use the keycodes for the modifiers for anything, and we

-     * don't generate them either (the keycodes actually given in the

-     * simulated modifier events are bogus).  So there is no modifier map.

-     * If we ever want to simulate real modifier keycodes, the list will be

-     * constant in the Carbon implementation.

-     */

-

-    if (dispPtr->modKeyCodes != NULL) {

-        ckfree((char *) dispPtr->modKeyCodes);

-    }

-    dispPtr->numModKeyCodes = 0;

-    dispPtr->modKeyCodes = NULL;

-}

+/* 
+ * tkMacOSXKeyboard.c --
+ *
+ *      Routines to support keyboard events on the Macintosh.
+ *
+ * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ * Copyright 2001, Apple Computer, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * RCS: @(#) $Id: tkMacOSXKeyboard.c,v 1.16 2004/02/14 16:32:39 cc_benny Exp $
+ */
+
+#include "tkInt.h"
+#include "X11/Xlib.h"
+#include "X11/keysym.h"
+#include <Carbon/Carbon.h>
+#include "tkMacOSXInt.h"
+#include "tkMacOSXEvent.h"      /* TkMacOSXKeycodeToUnicode() FIXME: That
+                                 * function should probably move here. */
+
+/*
+ * A couple of simple definitions to make code a bit more self-explaining.
+ *
+ * For the assignments of Mod1==alt==command and Mod2==meta==option, see also
+ * tkMacOSXMouseEvent.c.
+ */
+
+#define LATIN1_MAX       255
+#define MAC_KEYCODE_MAX  0x7F
+#define MAC_KEYCODE_MASK 0x7F
+#define ALT_MASK         Mod1Mask
+#define OPTION_MASK      Mod2Mask
+
+
+/*
+ * Tables enumerating the special keys defined on Mac keyboards.  These are
+ * necessary for correct keysym mappings for all keys where the keysyms are
+ * not identical with their ASCII or Latin-1 code points.
+ */
+
+typedef struct {
+    int keycode;                /* Macintosh keycode. */
+    KeySym keysym;              /* X windows keysym. */
+} KeyInfo;
+
+/*
+ * Notes on keyArray:
+ *
+ * 0x34, XK_Return - Powerbooks use this and some keymaps define it.
+ *
+ * 0x4C, XK_Return - XFree86 and Apple's X11 call this one XK_KP_Enter.
+ *
+ * 0x47, XK_Clear - This key is NumLock when used on PCs, but Mac
+ * applications don't use it like that, nor does Apple's X11.
+ *
+ * All other keycodes are taken from the published ADB keyboard layouts.
+ */
+
+static KeyInfo keyArray[] = {
+    {0x24,      XK_Return},
+    {0x30,      XK_Tab},
+    {0x33,      XK_BackSpace},
+    {0x34,      XK_Return},
+    {0x35,      XK_Escape},
+
+    {0x47,      XK_Clear},
+    {0x4C,      XK_Return},
+
+    {0x72,      XK_Help},
+    {0x73,      XK_Home},
+    {0x74,      XK_Page_Up},
+    {0x75,      XK_Delete},
+    {0x77,      XK_End},
+    {0x79,      XK_Page_Down},
+
+    {0x7B,      XK_Left},
+    {0x7C,      XK_Right},
+    {0x7D,      XK_Down},
+    {0x7E,      XK_Up},
+
+    {0,         0}
+};
+
+static KeyInfo virtualkeyArray[] = {
+    {122,       XK_F1},
+    {120,       XK_F2},
+    {99,        XK_F3},
+    {118,       XK_F4},
+    {96,        XK_F5},
+    {97,        XK_F6},
+    {98,        XK_F7},
+    {100,       XK_F8},
+    {101,       XK_F9},
+    {109,       XK_F10},
+    {103,       XK_F11},
+    {111,       XK_F12},
+    {105,       XK_F13},
+    {107,       XK_F14},
+    {113,       XK_F15},
+    {0,         0}
+};
+
+static int initialized = 0;
+static Tcl_HashTable keycodeTable;      /* keyArray hashed by keycode value. */
+static Tcl_HashTable vkeyTable;         /* virtualkeyArray hashed by virtual
+                                         * keycode value. */
+
+static int latin1Table[LATIN1_MAX+1];   /* Reverse mapping table for
+                                         * controls, ASCII and Latin-1.  */
+
+/*
+ * Prototypes for static functions used in this file.
+ */
+
+static void     InitKeyMaps (void);
+static void     InitLatin1Table(Display *display);
+static int      XKeysymToMacKeycode(Display *display, KeySym keysym);
+
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * InitKeyMaps --
+ *
+ *      Creates hash tables used by some of the functions in this file.
+ *
+ *      FIXME: As keycodes are defined to be in the limited range 0-127, it
+ *      would be easier and more efficient to use directly initialized plain
+ *      arrays and drop this function.
+ *
+ * Results:
+ *      None.
+ *
+ * Side effects:
+ *      Allocates memory & creates some hash tables.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+InitKeyMaps()
+{
+    Tcl_HashEntry *hPtr;
+    KeyInfo *kPtr;
+    int dummy;
+                
+    Tcl_InitHashTable(&keycodeTable, TCL_ONE_WORD_KEYS);
+    for (kPtr = keyArray; kPtr->keycode != 0; kPtr++) {
+        hPtr = Tcl_CreateHashEntry(&keycodeTable, (char *) kPtr->keycode,
+                &dummy);
+        Tcl_SetHashValue(hPtr, kPtr->keysym);
+    }
+    Tcl_InitHashTable(&vkeyTable, TCL_ONE_WORD_KEYS);
+    for (kPtr = virtualkeyArray; kPtr->keycode != 0; kPtr++) {
+        hPtr = Tcl_CreateHashEntry(&vkeyTable, (char *) kPtr->keycode,
+                &dummy);
+        Tcl_SetHashValue(hPtr, kPtr->keysym);
+    }
+    initialized = 1;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * InitLatin1Table --
+ *
+ *      Creates a simple table to be used for mapping from keysyms to
+ *      keycodes.  Always needs to be called before using latin1Table,
+ *      because the keyboard layout may have changed, and than the table must
+ *      be re-computed.
+ *
+ * Results:
+ *      None.
+ *
+ * Side effects:
+ *      Sets the global latin1Table.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+InitLatin1Table(
+    Display *display)
+{
+    static Boolean latin1_initialized = false;
+    static SInt16 lastKeyLayoutID = -1;
+
+    SInt16 keyScript;
+    SInt16 keyLayoutID;
+
+    keyScript = GetScriptManagerVariable(smKeyScript);
+    keyLayoutID = GetScriptVariable(keyScript,smScriptKeys);
+
+    if (!latin1_initialized || (lastKeyLayoutID != keyLayoutID)) {
+        int keycode;
+        KeySym keysym;
+        int state;
+        int modifiers;
+
+        latin1_initialized = true;
+        lastKeyLayoutID = keyLayoutID;
+
+        memset(latin1Table, 0, sizeof(latin1Table));
+        
+        /*
+         * In the common X11 implementations, a keymap has four columns
+         * "plain", "Shift", "Mode_switch" and "Mode_switch + Shift".  We
+         * don't use "Mode_switch", but we use "Option" instead.  (This is
+         * similar to Apple's X11 implementation, where "Mode_switch" is used
+         * as an alias for "Option".)
+         *
+         * So here we go through all 4 columns of the keymap and find all
+         * Latin-1 compatible keycodes.  We go through the columns
+         * back-to-front from the more exotic columns to the more simple, so
+         * that simple keycode-modifier combinations are preferred in the
+         * resulting table.
+         */
+
+        for (state = 3; state >= 0; state--) {
+            modifiers = 0;
+            if (state & 1) {
+                modifiers |= shiftKey;
+            }
+            if (state & 2) {
+                modifiers |= optionKey;
+            }
+
+            for (keycode = 0; keycode <= MAC_KEYCODE_MAX; keycode++) {
+                keysym = XKeycodeToKeysym(display,keycode<<16,state);
+                if (keysym <= LATIN1_MAX) {
+                    latin1Table[keysym] = keycode | modifiers;
+                }
+            }
+        }
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XKeycodeToKeysym --
+ *
+ *      Translate from a system-dependent keycode to a system-independent
+ *      keysym.
+ *
+ * Results:
+ *      Returns the translated keysym, or NoSymbol on failure.
+ *
+ * Side effects:
+ *      None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+KeySym 
+XKeycodeToKeysym(
+    Display* display,
+    KeyCode keycode,
+    int index)
+{
+    register Tcl_HashEntry *hPtr;
+    int newKeycode;
+    UniChar newChar;
+
+    (void) display; /*unused*/
+
+    if (!initialized) {
+        InitKeyMaps();
+    }
+
+    /*
+     * When determining what keysym to produce we first check to see if the
+     * key is a function key.  We then check to see if the character is
+     * another non-printing key.  Finally, we return the key syms for all
+     * ASCII and Latin-1 chars.
+     */
+
+    newKeycode = keycode >> 16;
+
+    if ((keycode & 0xFFFF) == 0x10) {
+        hPtr = Tcl_FindHashEntry(&vkeyTable, (char *) newKeycode);
+        if (hPtr != NULL) {
+            return (KeySym) Tcl_GetHashValue(hPtr);
+        }
+    }
+    hPtr = Tcl_FindHashEntry(&keycodeTable, (char *) newKeycode);
+    if (hPtr != NULL) {
+        return (KeySym) Tcl_GetHashValue(hPtr);
+    }
+
+    /* 
+     * Add in the Mac modifier flags for shift and option.
+     */
+
+    if (index & 1) {
+        newKeycode |= shiftKey;
+    }
+    if (index & 2) {
+        newKeycode |= optionKey;
+    }
+
+    newChar = 0;
+    TkMacOSXKeycodeToUnicode(
+        &newChar, 1, kEventRawKeyDown,
+        newKeycode & 0x00FF, newKeycode & 0xFF00, NULL);
+
+    /*
+     * X11 keysyms are identical to Unicode for ASCII and Latin-1.  Give up
+     * for other characters for now.
+     */
+
+    if ((newChar >= XK_space) && (newChar <= LATIN1_MAX)) {
+        return newChar;
+    }
+
+    return NoSymbol; 
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpGetString --
+ *
+ *      Retrieve the string equivalent for the given keyboard event.
+ *
+ * Results:
+ *      Returns the UTF string.
+ *
+ * Side effects:
+ *      None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+char *
+TkpGetString(
+    TkWindow *winPtr,           /* Window where event occurred: Needed to get
+                                 * input context. */
+    XEvent *eventPtr,           /* X keyboard event. */
+    Tcl_DString *dsPtr)         /* Uninitialized or empty string to hold
+                                 * result. */
+{
+    (void) winPtr; /*unused*/
+    Tcl_DStringInit(dsPtr);
+    return Tcl_DStringAppend(dsPtr, eventPtr->xkey.trans_chars, -1);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XGetModifierMapping --
+ *
+ *      Fetch the current keycodes used as modifiers.
+ *
+ * Results:
+ *      Returns a new modifier map.
+ *
+ * Side effects:
+ *      Allocates a new modifier map data structure.
+ *
+ *----------------------------------------------------------------------
+ */
+
+XModifierKeymap * 
+XGetModifierMapping(
+    Display* display)
+{ 
+    XModifierKeymap * modmap;
+
+    (void) display; /*unused*/
+
+    /*
+     * MacOSX doesn't use the key codes for the modifiers for anything, and
+     * we don't generate them either.  So there is no modifier map.
+     */
+
+    modmap = (XModifierKeymap *) ckalloc(sizeof(XModifierKeymap));
+    modmap->max_keypermod = 0;
+    modmap->modifiermap = NULL;
+    return modmap;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XFreeModifiermap --
+ *
+ *      Deallocate a modifier map that was created by XGetModifierMapping.
+ *
+ * Results:
+ *      None.
+ *
+ * Side effects:
+ *      Frees the datastructure referenced by modmap.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void 
+XFreeModifiermap(
+    XModifierKeymap *modmap)
+{
+    if (modmap->modifiermap != NULL) {
+        ckfree((char *) modmap->modifiermap);
+    }
+    ckfree((char *) modmap);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XKeysymToString, XStringToKeysym --
+ *
+ *      These X window functions map keysyms to strings & strings to keysyms.
+ *      However, Tk already does this for the most common keysyms.
+ *      Therefore, these functions only need to support keysyms that will be
+ *      specific to the Macintosh.  Currently, there are none.
+ *
+ * Results:
+ *      None.
+ *
+ * Side effects:
+ *      None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+char * 
+XKeysymToString(
+    KeySym keysym)
+{
+    return NULL; 
+}
+
+KeySym 
+XStringToKeysym(
+    const char* string)
+{ 
+    return NoSymbol;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XKeysymToMacKeycode --
+ *
+ *      An internal function like XKeysymToKeycode but only generating the
+ *      Mac specific keycode plus the modifiers Shift and Option.
+ *
+ * Results:
+ *      A Mac keycode with the actual keycode in the low byte and Mac-style
+ *      modifier bits in the high byte.
+ *
+ * Side effects:
+ *      None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+XKeysymToMacKeycode(
+    Display *display,
+    KeySym keysym)
+{
+    if (keysym <= LATIN1_MAX) {
+
+        /*
+         * Handle keysyms in the Latin-1 range where keysym and Unicode
+         * character code point are the same.
+         */
+
+        InitLatin1Table(display);
+        return latin1Table[keysym];
+
+    } else {
+
+        /*
+         * Handle special keys from our exception tables.  Don't mind if this
+         * is slow, neither the test suite nor [event generate] need to be
+         * optimized (we hope).
+         */
+
+        KeyInfo *kPtr;
+                
+        for (kPtr = keyArray; kPtr->keycode != 0; kPtr++) {
+            if (kPtr->keysym == keysym) {
+                return kPtr->keycode;
+            }
+        }
+        for (kPtr = virtualkeyArray; kPtr->keycode != 0; kPtr++) {
+            if (kPtr->keysym == keysym) {
+                return kPtr->keycode;
+            }
+        }
+
+        /*
+         * For other keysyms (not Latin-1 and not special keys), we'd need a
+         * generic keysym-to-unicode table.  We don't have that, so we give
+         * up here.
+         */
+
+        return 0;
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XKeysymToKeycode --
+ *
+ *      The function XKeysymToKeycode takes an X11 keysym and converts it
+ *      into a Mac keycode.  It is in the stubs table for compatibility but
+ *      not used anywhere in the core.
+ *
+ * Results:
+ *      A 32 bit keycode with the the mac keycode (without modifiers) in the
+ *      higher 16 bits of the keycode and the ASCII or Latin-1 code in the
+ *      lower 8 bits of the keycode.
+ *
+ * Side effects:
+ *      None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+KeyCode
+XKeysymToKeycode(
+    Display* display,
+    KeySym keysym)
+{
+    int macKeycode = XKeysymToMacKeycode(display, keysym);
+    KeyCode result;
+    
+    /*
+     * See also TkpSetKeycodeAndState.  The 0x0010 magic is used in
+     * XKeycodeToKeysym.  For special keys like XK_Return the lower 8 bits of
+     * the keysym are usually a related ASCII control code.
+     */
+
+    if ((keysym >= XK_F1) && (keysym <= XK_F35)) {
+        result = 0x0010;
+    } else {
+        result = 0x00FF & keysym;
+    }
+    result |= (macKeycode & MAC_KEYCODE_MASK) << 16;
+
+    return result;
+}
+
+/*
+NB: Keep this commented code for a moment for reference.
+
+    if ((keysym >= XK_space) && (XK_asciitilde)) {
+        if (keysym == 'a') {
+            virtualKeyCode = 0x00;
+        } else if (keysym == 'b' || keysym == 'B') {
+            virtualKeyCode = 0x0B;
+        } else if (keysym == 'c') {
+            virtualKeyCode = 0x08;
+        } else if (keysym == 'x' || keysym == 'X') {
+            virtualKeyCode = 0x07;
+        } else if (keysym == 'z') {
+            virtualKeyCode = 0x06;
+        } else if (keysym == ' ') {
+            virtualKeyCode = 0x31;
+        } else if (keysym == XK_Return) {
+            virtualKeyCode = 0x24;
+            keysym = '\r';
+        }
+        keycode = keysym + (virtualKeyCode <<16);
+    }
+
+    return keycode;
+*/
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpSetKeycodeAndState --
+ *
+ *      The function TkpSetKeycodeAndState takes a keysym and fills in the
+ *      appropriate members of an XEvent.  It is similar to XKeysymToKeycode,
+ *      but it also sets the modifier mask in the XEvent.  It is used by
+ *      [event generate] and it is in the stubs table.
+ *
+ * Results:
+ *      Fills an XEvent, sets the member xkey.keycode with a keycode
+ *      formatted the same as XKeysymToKeycode and the member xkey.state with
+ *      the modifiers implied by the keysym.  Also fills in xkey.trans_chars,
+ *      so that the actual characters can be retrieved later.
+ *
+ * Side effects:
+ *      None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkpSetKeycodeAndState(
+    Tk_Window tkwin,
+    KeySym keysym,
+    XEvent *eventPtr)
+{
+    if (keysym == NoSymbol) {
+        eventPtr->xkey.keycode = 0;
+    } else {
+        Display *display = Tk_Display(tkwin);
+        int macKeycode = XKeysymToMacKeycode(display, keysym);
+
+        /*
+         * See also XKeysymToKeycode.
+         */
+
+        if ((keysym >= XK_F1) && (keysym <= XK_F35)) {
+            eventPtr->xkey.keycode = 0x0010;
+        } else {
+            eventPtr->xkey.keycode = 0x00FF & keysym;
+        }
+        eventPtr->xkey.keycode |= (macKeycode & MAC_KEYCODE_MASK) << 16;
+
+        if (shiftKey & macKeycode) {
+            eventPtr->xkey.state |= ShiftMask;
+        }
+        if (optionKey & macKeycode) {
+            eventPtr->xkey.state |= OPTION_MASK;
+        }
+
+        if (keysym <= LATIN1_MAX) {
+            int done;
+            done = Tcl_UniCharToUtf(keysym,eventPtr->xkey.trans_chars);
+            eventPtr->xkey.trans_chars[done] = 0;
+        } else {
+            eventPtr->xkey.trans_chars[0] = 0;
+        }
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpGetKeySym --
+ *
+ *      Given an X KeyPress or KeyRelease event, map the keycode in the event
+ *      into a keysym.
+ *
+ * Results:
+ *      The return value is the keysym corresponding to eventPtr, or NoSymbol
+ *      if no matching keysym could be found.
+ *
+ * Side effects:
+ *      In the first call for a given display, keycode-to-keysym maps get
+ *      loaded.
+ *
+ *----------------------------------------------------------------------
+ */
+
+KeySym
+TkpGetKeySym(
+    TkDisplay *dispPtr,         /* Display in which to map keycode. */
+    XEvent *eventPtr)           /* Description of X event. */
+{
+    KeySym sym;
+    int index;
+
+    /*
+     * Refresh the mapping information if it's stale.
+     */
+
+    if (dispPtr->bindInfoStale) {
+        TkpInitKeymapInfo(dispPtr);
+    }
+
+    /*
+     * Handle pure modifier keys specially.  We use -1 as a signal for
+     * this.
+     */
+
+    if (eventPtr->xany.send_event == -1) {
+        int modifier = eventPtr->xkey.keycode;
+        if (modifier == cmdKey) {
+            return XK_Alt_L;
+        } else if (modifier == shiftKey) {
+            return XK_Shift_L;
+        } else if (modifier == alphaLock) {
+            return XK_Caps_Lock;
+        } else if (modifier == optionKey) {
+            return XK_Meta_L;
+        } else if (modifier == controlKey) {
+            return XK_Control_L;
+        } else if (modifier == rightShiftKey) {
+            return XK_Shift_R;
+        } else if (modifier == rightOptionKey) {
+            return XK_Meta_R;
+        } else if (modifier == rightControlKey) {
+            return XK_Control_R;
+        } else {
+
+            /*
+             * If we get here, we probably need to implement something new.
+             */
+
+            return NoSymbol;
+        } 
+    }
+
+    /*
+     * Figure out which of the four slots in the keymap vector to use for
+     * this key.  Refer to Xlib documentation for more info on how this
+     * computation works.  (Note: We use "Option" in keymap columns 2 and 3
+     * where other implementations have "Mode_switch".)
+     */
+
+    index = 0;
+
+    /*
+     * We want Option key combinations to use their base chars as keysyms, so
+     * we ignore the option modifier here.
+     */
+
+#if 0
+    if (eventPtr->xkey.state & OPTION_MASK) {
+        index |= 2;
+    }
+#endif
+
+    if ((eventPtr->xkey.state & ShiftMask)
+            || (/* (dispPtr->lockUsage != LU_IGNORE)
+                   && */ (eventPtr->xkey.state & LockMask))) {
+        index |= 1;
+    }
+
+    /*
+     * First try of the actual translation.
+     */
+
+    sym = XKeycodeToKeysym(dispPtr->display, eventPtr->xkey.keycode, index);
+
+    /*
+     * Special handling: If the key was shifted because of Lock, but lock is
+     * only caps lock, not shift lock, and the shifted keysym isn't
+     * upper-case alphabetic, then switch back to the unshifted keysym.
+     */
+
+    if ((index & 1) && !(eventPtr->xkey.state & ShiftMask)
+            /*&& (dispPtr->lockUsage == LU_CAPS)*/ ) {
+
+        /*
+         * FIXME: Keysyms are only identical to Unicode for ASCII and
+         * Latin-1, so we can't use Tcl_UniCharIsUpper() for keysyms outside
+         * that range.  This may be a serious problem here.
+         */
+
+        if ((sym == NoSymbol) || (sym > LATIN1_MAX)
+                || !Tcl_UniCharIsUpper(sym)) {
+            index &= ~1;
+            sym = XKeycodeToKeysym(dispPtr->display, eventPtr->xkey.keycode,
+                    index);
+        }
+    }
+
+    /*
+     * Another bit of special handling: If this is a shifted key and there is
+     * no keysym defined, then use the keysym for the unshifted key.
+     */
+
+    if ((index & 1) && (sym == NoSymbol)) {
+        sym = XKeycodeToKeysym(dispPtr->display, eventPtr->xkey.keycode,
+                index & ~1);
+    }
+    return sym;
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * TkpInitKeymapInfo --
+ *
+ *      This procedure is invoked to scan keymap information to recompute
+ *      stuff that's important for binding, such as the modifier key (if any)
+ *      that corresponds to the "Mode_switch" keysym.
+ *
+ * Results:
+ *      None.
+ *
+ * Side effects:
+ *      Keymap-related information in dispPtr is updated.
+ *
+ *--------------------------------------------------------------
+ */
+
+void
+TkpInitKeymapInfo(
+    TkDisplay *dispPtr)         /* Display for which to recompute keymap
+                                 * information. */
+{
+    dispPtr->bindInfoStale = 0;
+
+    /*
+     * Behaviours that are variable on X11 are defined constant on MacOSX.
+     * lockUsage is only used above in TkpGetKeySym(), nowhere else
+     * currently.  There is no offical "Mode_switch" key.
+     */
+
+    dispPtr->lockUsage = LU_CAPS;
+    dispPtr->modeModMask = 0;
+    dispPtr->altModMask = ALT_MASK;
+    dispPtr->metaModMask = OPTION_MASK;
+
+    /*
+     * MacOSX doesn't use the keycodes for the modifiers for anything, and we
+     * don't generate them either (the keycodes actually given in the
+     * simulated modifier events are bogus).  So there is no modifier map.
+     * If we ever want to simulate real modifier keycodes, the list will be
+     * constant in the Carbon implementation.
+     */
+
+    if (dispPtr->modKeyCodes != NULL) {
+        ckfree((char *) dispPtr->modKeyCodes);
+    }
+    dispPtr->numModKeyCodes = 0;
+    dispPtr->modKeyCodes = NULL;
+}