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/*
* tkMenu.c --
*
* This file contains most of the code for implementing menus in Tk. It takes
* care of all of the generic (platform-independent) parts of menus, and is
* supplemented by platform-specific files. The geometry calculation and
* drawing code for menus is in the file tkMenuDraw.c
*
* Copyright (c) 1990-1994 The Regents of the University of California.
* Copyright (c) 1994-1998 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/

/*
* Notes on implementation of menus:
*
* Menus can be used in three ways:
* - as a popup menu, either as part of a menubutton or standalone.
* - as a menubar. The menu's cascade items are arranged according to the
* specific platform to provide the user access to the menus at all times
* - as a tearoff palette. This is a window with the menu's items in it.
*
* The goal is to provide the Tk developer with a way to use a common set of
* menus for all of these tasks.
*
* In order to make the bindings for cascade menus work properly under Unix,
* the cascade menus' pathnames must be proper children of the menu that they
* are cascade from. So if there is a menu .m, and it has two cascades
* labelled "File" and "Edit", the cascade menus might have the pathnames
* .m.file and .m.edit. Another constraint is that the menus used for menubars
* must be children of the toplevel widget that they are attached to. And on
* the Macintosh, the platform specific menu handle for cascades attached to a
* menu bar must have a title that matches the label for the cascade menu.
*
* To handle all of the constraints, Tk menubars and tearoff menus are
* implemented using menu clones. Menu clones are full menus in their own
* right; they have a Tk window and pathname associated with them; they have a
* TkMenu structure and array of entries. However, they are linked with the
* original menu that they were cloned from. The reflect the attributes of the
* original, or "master", menu. So if an item is added to a menu, and that
* menu has clones, then the item must be added to all of its clones also.
* Menus are cloned when a menu is torn-off or when a menu is assigned as a
* menubar using the "-menu" option of the toplevel's pathname configure
* subcommand. When a clone is destroyed, only the clone is destroyed, but
* when the master menu is destroyed, all clones are also destroyed. This
* allows the developer to just deal with one set of menus when creating and
* destroying.
*
* Clones are rather tricky when a menu with cascade entries is cloned (such
* as a menubar). Not only does the menu have to be cloned, but each cascade
* entry's corresponding menu must also be cloned. This maintains the pathname
* parent-child hierarchy necessary for menubars and toplevels to work. This
* leads to several special cases:
*
* 1. When a new menu is created, and it is pointed to by cascade entries in
* cloned menus, the new menu has to be cloned to parallel the cascade
* structure.
* 2. When a cascade item is added to a menu that has been cloned, and the
* menu that the cascade item points to exists, that menu has to be cloned.
* 3. When the menu that a cascade entry points to is changed, the old cloned
* cascade menu has to be discarded, and the new one has to be cloned.
*/

#if 0

/*
* used only to test for old config code
*/

#define __NO_OLD_CONFIG
#endif

#include "tkInt.h"
#include "tkMenu.h"

#define MENU_HASH_KEY "tkMenus"

typedef struct ThreadSpecificData {
    int menusInitialized; /* Flag indicates whether thread-specific
* elements of the Windows Menu module have
* been initialized. */
} ThreadSpecificData;
static Tcl_ThreadDataKey dataKey;

/*
* The following flag indicates whether the process-wide state for the Menu
* module has been intialized. The Mutex protects access to that flag.
*/

static int menusInitialized;
TCL_DECLARE_MUTEX(menuMutex)

/*
* Configuration specs for individual menu entries. If this changes, be sure
* to update code in TkpMenuInit that changes the font string entry.
*/

static const char *const menuStateStrings[] = {"active", "normal", "disabled", NULL};

static const char *const menuEntryTypeStrings[] = {
    "cascade", "checkbutton", "command", "radiobutton", "separator", NULL
};

/*
* The following table defines the legal values for the -compound option. It
* is used with the "enum compound" declaration in tkMenu.h
*/

static const char *const compoundStrings[] = {
    "bottom", "center", "left", "none", "right", "top", NULL
};

static const Tk_OptionSpec tkBasicMenuEntryConfigSpecs[] = {
    {TK_OPTION_BORDER, "-activebackground", NULL, NULL,
DEF_MENU_ENTRY_ACTIVE_BG, Tk_Offset(TkMenuEntry, activeBorderPtr), -1,
TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_COLOR, "-activeforeground", NULL, NULL,
DEF_MENU_ENTRY_ACTIVE_FG,
Tk_Offset(TkMenuEntry, activeFgPtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_STRING, "-accelerator", NULL, NULL,
DEF_MENU_ENTRY_ACCELERATOR,
Tk_Offset(TkMenuEntry, accelPtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_BORDER, "-background", NULL, NULL,
DEF_MENU_ENTRY_BG,
Tk_Offset(TkMenuEntry, borderPtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_BITMAP, "-bitmap", NULL, NULL,
DEF_MENU_ENTRY_BITMAP,
Tk_Offset(TkMenuEntry, bitmapPtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_BOOLEAN, "-columnbreak", NULL, NULL,
DEF_MENU_ENTRY_COLUMN_BREAK,
-1, Tk_Offset(TkMenuEntry, columnBreak), 0, NULL, 0},
    {TK_OPTION_STRING, "-command", NULL, NULL,
DEF_MENU_ENTRY_COMMAND,
Tk_Offset(TkMenuEntry, commandPtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_STRING_TABLE, "-compound", "compound", "Compound",
DEF_MENU_ENTRY_COMPOUND, -1, Tk_Offset(TkMenuEntry, compound), 0,
(ClientData) compoundStrings, 0},
    {TK_OPTION_FONT, "-font", NULL, NULL,
DEF_MENU_ENTRY_FONT,
Tk_Offset(TkMenuEntry, fontPtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_COLOR, "-foreground", NULL, NULL,
DEF_MENU_ENTRY_FG,
Tk_Offset(TkMenuEntry, fgPtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_BOOLEAN, "-hidemargin", NULL, NULL,
DEF_MENU_ENTRY_HIDE_MARGIN,
-1, Tk_Offset(TkMenuEntry, hideMargin), 0, NULL, 0},
    {TK_OPTION_STRING, "-image", NULL, NULL,
DEF_MENU_ENTRY_IMAGE,
Tk_Offset(TkMenuEntry, imagePtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_STRING, "-label", NULL, NULL,
DEF_MENU_ENTRY_LABEL,
Tk_Offset(TkMenuEntry, labelPtr), -1, 0, NULL, 0},
    {TK_OPTION_STRING_TABLE, "-state", NULL, NULL,
DEF_MENU_ENTRY_STATE,
-1, Tk_Offset(TkMenuEntry, state), 0,
(ClientData) menuStateStrings, 0},
    {TK_OPTION_INT, "-underline", NULL, NULL,
DEF_MENU_ENTRY_UNDERLINE, -1, Tk_Offset(TkMenuEntry, underline), 0, NULL, 0},
    {TK_OPTION_END, NULL, NULL, NULL, 0, 0, 0, 0, NULL, 0}
};

static const Tk_OptionSpec tkSeparatorEntryConfigSpecs[] = {
    {TK_OPTION_BORDER, "-background", NULL, NULL,
DEF_MENU_ENTRY_BG,
Tk_Offset(TkMenuEntry, borderPtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_END, NULL, NULL, NULL, 0, 0, 0, 0, NULL, 0}
};

static const Tk_OptionSpec tkCheckButtonEntryConfigSpecs[] = {
    {TK_OPTION_BOOLEAN, "-indicatoron", NULL, NULL,
DEF_MENU_ENTRY_INDICATOR,
-1, Tk_Offset(TkMenuEntry, indicatorOn), 0, NULL, 0},
    {TK_OPTION_STRING, "-offvalue", NULL, NULL,
DEF_MENU_ENTRY_OFF_VALUE,
Tk_Offset(TkMenuEntry, offValuePtr), -1, 0, NULL, 0},
    {TK_OPTION_STRING, "-onvalue", NULL, NULL,
DEF_MENU_ENTRY_ON_VALUE,
Tk_Offset(TkMenuEntry, onValuePtr), -1, 0, NULL, 0},
    {TK_OPTION_COLOR, "-selectcolor", NULL, NULL,
DEF_MENU_ENTRY_SELECT,
Tk_Offset(TkMenuEntry, indicatorFgPtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_STRING, "-selectimage", NULL, NULL,
DEF_MENU_ENTRY_SELECT_IMAGE,
Tk_Offset(TkMenuEntry, selectImagePtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_STRING, "-variable", NULL, NULL,
DEF_MENU_ENTRY_CHECK_VARIABLE,
Tk_Offset(TkMenuEntry, namePtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_END, NULL, NULL, NULL,
NULL, 0, -1, 0, tkBasicMenuEntryConfigSpecs, 0}
};

static const Tk_OptionSpec tkRadioButtonEntryConfigSpecs[] = {
    {TK_OPTION_BOOLEAN, "-indicatoron", NULL, NULL,
DEF_MENU_ENTRY_INDICATOR,
-1, Tk_Offset(TkMenuEntry, indicatorOn), 0, NULL, 0},
    {TK_OPTION_COLOR, "-selectcolor", NULL, NULL,
DEF_MENU_ENTRY_SELECT,
Tk_Offset(TkMenuEntry, indicatorFgPtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_STRING, "-selectimage", NULL, NULL,
DEF_MENU_ENTRY_SELECT_IMAGE,
Tk_Offset(TkMenuEntry, selectImagePtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_STRING, "-value", NULL, NULL,
DEF_MENU_ENTRY_VALUE,
Tk_Offset(TkMenuEntry, onValuePtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_STRING, "-variable", NULL, NULL,
DEF_MENU_ENTRY_RADIO_VARIABLE,
Tk_Offset(TkMenuEntry, namePtr), -1, 0, NULL, 0},
    {TK_OPTION_END, NULL, NULL, NULL,
NULL, 0, -1, 0, tkBasicMenuEntryConfigSpecs, 0}
};

static const Tk_OptionSpec tkCascadeEntryConfigSpecs[] = {
    {TK_OPTION_STRING, "-menu", NULL, NULL,
DEF_MENU_ENTRY_MENU,
Tk_Offset(TkMenuEntry, namePtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_END, NULL, NULL, NULL,
NULL, 0, -1, 0, tkBasicMenuEntryConfigSpecs, 0}
};

static const Tk_OptionSpec tkTearoffEntryConfigSpecs[] = {
    {TK_OPTION_BORDER, "-background", NULL, NULL,
DEF_MENU_ENTRY_BG,
Tk_Offset(TkMenuEntry, borderPtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_STRING_TABLE, "-state", NULL, NULL,
DEF_MENU_ENTRY_STATE, -1, Tk_Offset(TkMenuEntry, state), 0,
(ClientData) menuStateStrings, 0},
    {TK_OPTION_END, NULL, NULL, NULL, 0, 0, 0, 0, NULL, 0}
};

static const Tk_OptionSpec *specsArray[] = {
    tkCascadeEntryConfigSpecs, tkCheckButtonEntryConfigSpecs,
    tkBasicMenuEntryConfigSpecs, tkRadioButtonEntryConfigSpecs,
    tkSeparatorEntryConfigSpecs, tkTearoffEntryConfigSpecs
};

/*
* Menu type strings for use with Tcl_GetIndexFromObj.
*/

static const char *const menuTypeStrings[] = {
    "normal", "tearoff", "menubar", NULL
};

static const Tk_OptionSpec tkMenuConfigSpecs[] = {
    {TK_OPTION_BORDER, "-activebackground", "activeBackground",
"Foreground", DEF_MENU_ACTIVE_BG_COLOR,
Tk_Offset(TkMenu, activeBorderPtr), -1, 0,
(ClientData) DEF_MENU_ACTIVE_BG_MONO, 0},
    {TK_OPTION_PIXELS, "-activeborderwidth", "activeBorderWidth",
"BorderWidth", DEF_MENU_ACTIVE_BORDER_WIDTH,
Tk_Offset(TkMenu, activeBorderWidthPtr), -1, 0, NULL, 0},
    {TK_OPTION_COLOR, "-activeforeground", "activeForeground",
"Background", DEF_MENU_ACTIVE_FG_COLOR,
Tk_Offset(TkMenu, activeFgPtr), -1, 0,
(ClientData) DEF_MENU_ACTIVE_FG_MONO, 0},
    {TK_OPTION_BORDER, "-background", "background", "Background",
DEF_MENU_BG_COLOR, Tk_Offset(TkMenu, borderPtr), -1, 0,
(ClientData) DEF_MENU_BG_MONO, 0},
    {TK_OPTION_SYNONYM, "-bd", NULL, NULL,
NULL, 0, -1, 0, "-borderwidth", 0},
    {TK_OPTION_SYNONYM, "-bg", NULL, NULL,
NULL, 0, -1, 0, "-background", 0},
    {TK_OPTION_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
DEF_MENU_BORDER_WIDTH,
Tk_Offset(TkMenu, borderWidthPtr), -1, 0, NULL, 0},
    {TK_OPTION_CURSOR, "-cursor", "cursor", "Cursor",
DEF_MENU_CURSOR,
Tk_Offset(TkMenu, cursorPtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_COLOR, "-disabledforeground", "disabledForeground",
"DisabledForeground", DEF_MENU_DISABLED_FG_COLOR,
Tk_Offset(TkMenu, disabledFgPtr), -1, TK_OPTION_NULL_OK,
(ClientData) DEF_MENU_DISABLED_FG_MONO, 0},
    {TK_OPTION_SYNONYM, "-fg", NULL, NULL,
NULL, 0, -1, 0, "-foreground", 0},
    {TK_OPTION_FONT, "-font", "font", "Font",
DEF_MENU_FONT, Tk_Offset(TkMenu, fontPtr), -1, 0, NULL, 0},
    {TK_OPTION_COLOR, "-foreground", "foreground", "Foreground",
DEF_MENU_FG, Tk_Offset(TkMenu, fgPtr), -1, 0, NULL, 0},
    {TK_OPTION_STRING, "-postcommand", "postCommand", "Command",
DEF_MENU_POST_COMMAND,
Tk_Offset(TkMenu, postCommandPtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_RELIEF, "-relief", "relief", "Relief",
DEF_MENU_RELIEF, Tk_Offset(TkMenu, reliefPtr), -1, 0, NULL, 0},
    {TK_OPTION_COLOR, "-selectcolor", "selectColor", "Background",
DEF_MENU_SELECT_COLOR, Tk_Offset(TkMenu, indicatorFgPtr), -1, 0,
(ClientData) DEF_MENU_SELECT_MONO, 0},
    {TK_OPTION_STRING, "-takefocus", "takeFocus", "TakeFocus",
DEF_MENU_TAKE_FOCUS,
Tk_Offset(TkMenu, takeFocusPtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_BOOLEAN, "-tearoff", "tearOff", "TearOff",
DEF_MENU_TEAROFF, -1, Tk_Offset(TkMenu, tearoff), 0, NULL, 0},
    {TK_OPTION_STRING, "-tearoffcommand", "tearOffCommand",
"TearOffCommand", DEF_MENU_TEAROFF_CMD,
Tk_Offset(TkMenu, tearoffCommandPtr), -1, TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_STRING, "-title", "title", "Title",
DEF_MENU_TITLE, Tk_Offset(TkMenu, titlePtr), -1,
TK_OPTION_NULL_OK, NULL, 0},
    {TK_OPTION_STRING_TABLE, "-type", "type", "Type",
DEF_MENU_TYPE, Tk_Offset(TkMenu, menuTypePtr), -1, TK_OPTION_NULL_OK,
(ClientData) menuTypeStrings, 0},
    {TK_OPTION_END, NULL, NULL, NULL, 0, 0, 0, 0, NULL, 0}
};

/*
* Command line options. Put here because MenuCmd has to look at them along
* with MenuWidgetObjCmd.
*/

static const char *const menuOptions[] = {
    "activate", "add", "cget", "clone", "configure", "delete", "entrycget",
    "entryconfigure", "index", "insert", "invoke", "post", "postcascade",
    "type", "unpost", "xposition", "yposition", NULL
};
enum options {
    MENU_ACTIVATE, MENU_ADD, MENU_CGET, MENU_CLONE, MENU_CONFIGURE,
    MENU_DELETE, MENU_ENTRYCGET, MENU_ENTRYCONFIGURE, MENU_INDEX,
    MENU_INSERT, MENU_INVOKE, MENU_POST, MENU_POSTCASCADE, MENU_TYPE,
    MENU_UNPOST, MENU_XPOSITION, MENU_YPOSITION
};

/*
* Prototypes for static functions in this file:
*/

static int CloneMenu(TkMenu *menuPtr, Tcl_Obj *newMenuName,
Tcl_Obj *newMenuTypeString);
static int ConfigureMenu(Tcl_Interp *interp, TkMenu *menuPtr,
int objc, Tcl_Obj *const objv[]);
static int ConfigureMenuCloneEntries(Tcl_Interp *interp,
TkMenu *menuPtr, int index,
int objc, Tcl_Obj *const objv[]);
static int ConfigureMenuEntry(TkMenuEntry *mePtr,
int objc, Tcl_Obj *const objv[]);
static void DeleteMenuCloneEntries(TkMenu *menuPtr,
int first, int last);
static void DestroyMenuHashTable(ClientData clientData,
Tcl_Interp *interp);
static void DestroyMenuInstance(TkMenu *menuPtr);
static void DestroyMenuEntry(char *memPtr);
static int GetIndexFromCoords(Tcl_Interp *interp,
TkMenu *menuPtr, const char *string,
int *indexPtr);
static int MenuDoYPosition(Tcl_Interp *interp,
TkMenu *menuPtr, Tcl_Obj *objPtr);
static int MenuDoXPosition(Tcl_Interp *interp,
TkMenu *menuPtr, Tcl_Obj *objPtr);
static int MenuAddOrInsert(Tcl_Interp *interp,
TkMenu *menuPtr, Tcl_Obj *indexPtr, int objc,
Tcl_Obj *const objv[]);
static int MenuCmd(ClientData clientData, Tcl_Interp *interp,
int objc, Tcl_Obj *const objv[]);
static void MenuCmdDeletedProc(ClientData clientData);
static TkMenuEntry * MenuNewEntry(TkMenu *menuPtr, int index, int type);
static char * MenuVarProc(ClientData clientData,
Tcl_Interp *interp, const char *name1,
const char *name2, int flags);
static int MenuWidgetObjCmd(ClientData clientData,
Tcl_Interp *interp, int objc,
Tcl_Obj *const objv[]);
static void MenuWorldChanged(ClientData instanceData);
static int PostProcessEntry(TkMenuEntry *mePtr);
static void RecursivelyDeleteMenu(TkMenu *menuPtr);
static void UnhookCascadeEntry(TkMenuEntry *mePtr);
static void TkMenuCleanup(ClientData unused);

/*
* The structure below is a list of procs that respond to certain window
* manager events. One of these includes a font change, which forces the
* geometry proc to be called.
*/

static const Tk_ClassProcs menuClass = {
    sizeof(Tk_ClassProcs), /* size */
    MenuWorldChanged, /* worldChangedProc */
    NULL, /* createProc */
    NULL /* modalProc */
};

/*
*--------------------------------------------------------------
*
* TkCreateMenuCmd --
*
* Called by Tk at initialization time to create the menu command.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*--------------------------------------------------------------
*/

static void
FreeOptionTables(
    ClientData clientData,
    Tcl_Interp *interp)
{
    ckfree(clientData);
}

int
TkCreateMenuCmd(
    Tcl_Interp *interp) /* Interpreter we are creating the command
* in. */
{
    TkMenuOptionTables *optionTablesPtr = ckalloc(sizeof(TkMenuOptionTables));

    optionTablesPtr->menuOptionTable =
Tk_CreateOptionTable(interp, tkMenuConfigSpecs);
    optionTablesPtr->entryOptionTables[TEAROFF_ENTRY] =
Tk_CreateOptionTable(interp, specsArray[TEAROFF_ENTRY]);
    optionTablesPtr->entryOptionTables[COMMAND_ENTRY] =
Tk_CreateOptionTable(interp, specsArray[COMMAND_ENTRY]);
    optionTablesPtr->entryOptionTables[CASCADE_ENTRY] =
Tk_CreateOptionTable(interp, specsArray[CASCADE_ENTRY]);
    optionTablesPtr->entryOptionTables[SEPARATOR_ENTRY] =
Tk_CreateOptionTable(interp, specsArray[SEPARATOR_ENTRY]);
    optionTablesPtr->entryOptionTables[RADIO_BUTTON_ENTRY] =
Tk_CreateOptionTable(interp, specsArray[RADIO_BUTTON_ENTRY]);
    optionTablesPtr->entryOptionTables[CHECK_BUTTON_ENTRY] =
Tk_CreateOptionTable(interp, specsArray[CHECK_BUTTON_ENTRY]);

    Tcl_CreateObjCommand(interp, "menu", MenuCmd, optionTablesPtr, 0);
    Tcl_CallWhenDeleted(interp, FreeOptionTables, optionTablesPtr);

    if (Tcl_IsSafe(interp)) {
Tcl_HideCommand(interp, "menu", "menu");
    }

    return TCL_OK;
}

/*
*--------------------------------------------------------------
*
* MenuCmd --
*
* This function is invoked to process the "menu" Tcl command. See the
* user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*--------------------------------------------------------------
*/

static int
MenuCmd(
    ClientData clientData, /* Main window associated with interpreter. */
    Tcl_Interp *interp, /* Current interpreter. */
    int objc, /* Number of arguments. */
    Tcl_Obj *const objv[]) /* Argument strings. */
{
    Tk_Window tkwin = Tk_MainWindow(interp);
    Tk_Window newWin;
    register TkMenu *menuPtr;
    TkMenuReferences *menuRefPtr;
    int i, index, toplevel;
    const char *windowName;
    static const char *const typeStringList[] = {"-type", NULL};
    TkMenuOptionTables *optionTablesPtr = clientData;

    if (objc < 2) {
Tcl_WrongNumArgs(interp, 1, objv, "pathName ?-option value ...?");
return TCL_ERROR;
    }

    TkMenuInit();

    toplevel = 1;
    for (i = 2; i < (objc - 1); i++) {
if (Tcl_GetIndexFromObj(NULL, objv[i], typeStringList, NULL, 0,
&index) != TCL_ERROR) {
if ((Tcl_GetIndexFromObj(NULL, objv[i + 1], menuTypeStrings, NULL,
0, &index) == TCL_OK) && (index == MENUBAR)) {
toplevel = 0;
}
break;
}
    }

    windowName = Tcl_GetString(objv[1]);
    newWin = Tk_CreateWindowFromPath(interp, tkwin, windowName,
toplevel ? "" : NULL);
    if (newWin == NULL) {
return TCL_ERROR;
    }

    /*
* Initialize the data structure for the menu. Note that the menuPtr is
* eventually freed in 'TkMenuEventProc' in tkMenuDraw.c, when
* Tcl_EventuallyFree is called.
*/

    menuPtr = ckalloc(sizeof(TkMenu));
    memset(menuPtr, 0, sizeof(TkMenu));
    menuPtr->tkwin = newWin;
    menuPtr->display = Tk_Display(newWin);
    menuPtr->interp = interp;
    menuPtr->widgetCmd = Tcl_CreateObjCommand(interp,
Tk_PathName(menuPtr->tkwin), MenuWidgetObjCmd, menuPtr,
MenuCmdDeletedProc);
    menuPtr->active = -1;
    menuPtr->cursorPtr = None;
    menuPtr->masterMenuPtr = menuPtr;
    menuPtr->menuType = UNKNOWN_TYPE;
    menuPtr->optionTablesPtr = optionTablesPtr;
    TkMenuInitializeDrawingFields(menuPtr);

    Tk_SetClass(menuPtr->tkwin, "Menu");
    Tk_SetClassProcs(menuPtr->tkwin, &menuClass, menuPtr);
    Tk_CreateEventHandler(newWin,
ExposureMask|StructureNotifyMask|ActivateMask,
TkMenuEventProc, menuPtr);
    if (Tk_InitOptions(interp, (char *) menuPtr,
menuPtr->optionTablesPtr->menuOptionTable, menuPtr->tkwin)
!= TCL_OK) {
     Tk_DestroyWindow(menuPtr->tkwin);
     return TCL_ERROR;
    }


    menuRefPtr = TkCreateMenuReferences(menuPtr->interp,
Tk_PathName(menuPtr->tkwin));
    menuRefPtr->menuPtr = menuPtr;
    menuPtr->menuRefPtr = menuRefPtr;
    if (TCL_OK != TkpNewMenu(menuPtr)) {
     Tk_DestroyWindow(menuPtr->tkwin);
     return TCL_ERROR;
    }

    if (ConfigureMenu(interp, menuPtr, objc - 2, objv + 2) != TCL_OK) {
     Tk_DestroyWindow(menuPtr->tkwin);
     return TCL_ERROR;
    }

    /*
* If a menu has a parent menu pointing to it as a cascade entry, the
* parent menu needs to be told that this menu now exists so that the
* platform-part of the menu is correctly updated.
*
* If a menu has an instance and has cascade entries, then each cascade
* menu must also have a parallel instance. This is especially true on the
* Mac, where each menu has to have a separate title everytime it is in a
* menubar. For instance, say you have a menu .m1 with a cascade entry for
* .m2, where .m2 does not exist yet. You then put .m1 into a menubar.
* This creates a menubar instance for .m1, but since .m2 is not there,
* nothing else happens. When we go to create .m2, we hook it up properly
* with .m1. However, we now need to clone .m2 and assign the clone of .m2
* to be the cascade entry for the clone of .m1. This is special case #1
* listed in the introductory comment.
*/

    if (menuRefPtr->parentEntryPtr != NULL) {
TkMenuEntry *cascadeListPtr = menuRefPtr->parentEntryPtr;
TkMenuEntry *nextCascadePtr;
Tcl_Obj *newMenuName, *newObjv[2];

while (cascadeListPtr != NULL) {
nextCascadePtr = cascadeListPtr->nextCascadePtr;

      /*
* If we have a new master menu, and an existing cloned menu
* points to this menu in a cascade entry, we have to clone the
* new menu and point the entry to the clone instead of the menu
* we are creating. Otherwise, ConfigureMenuEntry will hook up the
* platform-specific cascade linkages now that the menu we are
* creating exists.
*/

      if ((menuPtr->masterMenuPtr != menuPtr)
      || ((menuPtr->masterMenuPtr == menuPtr)
      && ((cascadeListPtr->menuPtr->masterMenuPtr
== cascadeListPtr->menuPtr)))) {
newObjv[0] = Tcl_NewStringObj("-menu", -1);
newObjv[1] = Tcl_NewStringObj(Tk_PathName(menuPtr->tkwin),-1);
Tcl_IncrRefCount(newObjv[0]);
Tcl_IncrRefCount(newObjv[1]);
      ConfigureMenuEntry(cascadeListPtr, 2, newObjv);
Tcl_DecrRefCount(newObjv[0]);
Tcl_DecrRefCount(newObjv[1]);
      } else {
Tcl_Obj *normalPtr = Tcl_NewStringObj("normal", -1);
Tcl_Obj *windowNamePtr = Tcl_NewStringObj(
Tk_PathName(cascadeListPtr->menuPtr->tkwin), -1);

Tcl_IncrRefCount(normalPtr);
Tcl_IncrRefCount(windowNamePtr);
newMenuName = TkNewMenuName(menuPtr->interp,
      windowNamePtr, menuPtr);
Tcl_IncrRefCount(newMenuName);
CloneMenu(menuPtr, newMenuName, normalPtr);

/*
* Now we can set the new menu instance to be the cascade
* entry of the parent's instance.
*/

newObjv[0] = Tcl_NewStringObj("-menu", -1);
newObjv[1] = newMenuName;
Tcl_IncrRefCount(newObjv[0]);
ConfigureMenuEntry(cascadeListPtr, 2, newObjv);
Tcl_DecrRefCount(normalPtr);
Tcl_DecrRefCount(newObjv[0]);
Tcl_DecrRefCount(newObjv[1]);
Tcl_DecrRefCount(windowNamePtr);
}
cascadeListPtr = nextCascadePtr;
}
    }

    /*
* If there already exist toplevel widgets that refer to this menu, find
* them and notify them so that they can reconfigure their geometry to
* reflect the menu.
*/

    if (menuRefPtr->topLevelListPtr != NULL) {
     TkMenuTopLevelList *topLevelListPtr = menuRefPtr->topLevelListPtr;
     TkMenuTopLevelList *nextPtr;
     Tk_Window listtkwin;

while (topLevelListPtr != NULL) {
     /*
* Need to get the next pointer first. TkSetWindowMenuBar changes
* the list, so that the next pointer is different after calling
* it.
*/

     nextPtr = topLevelListPtr->nextPtr;
     listtkwin = topLevelListPtr->tkwin;
     TkSetWindowMenuBar(menuPtr->interp, listtkwin,
     Tk_PathName(menuPtr->tkwin), Tk_PathName(menuPtr->tkwin));
     topLevelListPtr = nextPtr;
     }
    }

    Tcl_SetObjResult(interp, TkNewWindowObj(menuPtr->tkwin));
    return TCL_OK;
}

/*
*--------------------------------------------------------------
*
* MenuWidgetObjCmd --
*
* This function is invoked to process the Tcl command that corresponds
* to a widget managed by this module. See the user documentation for
* details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*--------------------------------------------------------------
*/

static int
MenuWidgetObjCmd(
    ClientData clientData, /* Information about menu widget. */
    Tcl_Interp *interp, /* Current interpreter. */
    int objc, /* Number of arguments. */
    Tcl_Obj *const objv[]) /* Argument strings. */
{
    register TkMenu *menuPtr = clientData;
    register TkMenuEntry *mePtr;
    int result = TCL_OK;
    int option;

    if (objc < 2) {
Tcl_WrongNumArgs(interp, 1, objv, "option ?arg ...?");
return TCL_ERROR;
    }
    if (Tcl_GetIndexFromObj(interp, objv[1], menuOptions, "option", 0,
&option) != TCL_OK) {
return TCL_ERROR;
    }
    Tcl_Preserve(menuPtr);

    switch ((enum options) option) {
    case MENU_ACTIVATE: {
int index;

if (objc != 3) {
Tcl_WrongNumArgs(interp, 2, objv, "index");
goto error;
}
if (TkGetMenuIndex(interp, menuPtr, objv[2], 0, &index) != TCL_OK) {
goto error;
}
if (menuPtr->active == index) {
goto done;
}
if ((index >= 0) && ((menuPtr->entries[index]->type==SEPARATOR_ENTRY)
|| (menuPtr->entries[index]->state == ENTRY_DISABLED))) {
index = -1;
}
result = TkActivateMenuEntry(menuPtr, index);
break;
    }
    case MENU_ADD:
if (objc < 3) {
Tcl_WrongNumArgs(interp, 2, objv, "type ?-option value ...?");
goto error;
}

if (MenuAddOrInsert(interp, menuPtr, NULL, objc-2, objv+2) != TCL_OK){
goto error;
}
break;
    case MENU_CGET: {
Tcl_Obj *resultPtr;

if (objc != 3) {
Tcl_WrongNumArgs(interp, 2, objv, "option");
goto error;
}
resultPtr = Tk_GetOptionValue(interp, (char *) menuPtr,
menuPtr->optionTablesPtr->menuOptionTable, objv[2],
menuPtr->tkwin);
if (resultPtr == NULL) {
goto error;
}
Tcl_SetObjResult(interp, resultPtr);
break;
    }
    case MENU_CLONE:
if ((objc < 3) || (objc > 4)) {
Tcl_WrongNumArgs(interp, 2, objv, "newMenuName ?menuType?");
goto error;
}
result = CloneMenu(menuPtr, objv[2], (objc == 3) ? NULL : objv[3]);
break;
    case MENU_CONFIGURE: {
Tcl_Obj *resultPtr;

if (objc == 2) {
resultPtr = Tk_GetOptionInfo(interp, (char *) menuPtr,
menuPtr->optionTablesPtr->menuOptionTable, NULL,
menuPtr->tkwin);
if (resultPtr == NULL) {
result = TCL_ERROR;
} else {
result = TCL_OK;
Tcl_SetObjResult(interp, resultPtr);
}
} else if (objc == 3) {
resultPtr = Tk_GetOptionInfo(interp, (char *) menuPtr,
menuPtr->optionTablesPtr->menuOptionTable, objv[2],
menuPtr->tkwin);
if (resultPtr == NULL) {
result = TCL_ERROR;
} else {
result = TCL_OK;
Tcl_SetObjResult(interp, resultPtr);
}
} else {
result = ConfigureMenu(interp, menuPtr, objc - 2, objv + 2);
}
if (result != TCL_OK) {
goto error;
}
break;
    }
    case MENU_DELETE: {
int first, last;

if ((objc != 3) && (objc != 4)) {
Tcl_WrongNumArgs(interp, 2, objv, "first ?last?");
goto error;
}

/*
* If 'first' explicitly refers to past the end of the menu, we don't
* do anything. [Bug 220950]
*/

if (isdigit(UCHAR(Tcl_GetString(objv[2])[0]))
&& Tcl_GetIntFromObj(NULL, objv[2], &first) == TCL_OK) {
if (first >= menuPtr->numEntries) {
goto done;
}
} else if (TkGetMenuIndex(interp,menuPtr,objv[2],0,&first) != TCL_OK){
goto error;
}
if (objc == 3) {
last = first;
} else if (TkGetMenuIndex(interp,menuPtr,objv[3],0,&last) != TCL_OK) {
goto error;
}

if (menuPtr->tearoff && (first == 0)) {
/*
* Sorry, can't delete the tearoff entry; must reconfigure the
* menu.
*/

first = 1;
}
if ((first < 0) || (last < first)) {
goto done;
}
DeleteMenuCloneEntries(menuPtr, first, last);
break;
    }
    case MENU_ENTRYCGET: {
int index;
Tcl_Obj *resultPtr;

if (objc != 4) {
Tcl_WrongNumArgs(interp, 2, objv, "index option");
goto error;
}
if (TkGetMenuIndex(interp, menuPtr, objv[2], 0, &index) != TCL_OK) {
goto error;
}
if (index < 0) {
goto done;
}
mePtr = menuPtr->entries[index];
Tcl_Preserve(mePtr);
resultPtr = Tk_GetOptionValue(interp, (char *) mePtr,
mePtr->optionTable, objv[3], menuPtr->tkwin);
Tcl_Release(mePtr);
if (resultPtr == NULL) {
goto error;
}
Tcl_SetObjResult(interp, resultPtr);
break;
    }
    case MENU_ENTRYCONFIGURE: {
int index;
Tcl_Obj *resultPtr;

if (objc < 3) {
Tcl_WrongNumArgs(interp, 2, objv, "index ?-option value ...?");
goto error;
}
if (TkGetMenuIndex(interp, menuPtr, objv[2], 0, &index) != TCL_OK) {
goto error;
}
if (index < 0) {
goto done;
}
mePtr = menuPtr->entries[index];
Tcl_Preserve(mePtr);
if (objc == 3) {
resultPtr = Tk_GetOptionInfo(interp, (char *) mePtr,
mePtr->optionTable, NULL, menuPtr->tkwin);
if (resultPtr == NULL) {
result = TCL_ERROR;
} else {
result = TCL_OK;
Tcl_SetObjResult(interp, resultPtr);
}
} else if (objc == 4) {
resultPtr = Tk_GetOptionInfo(interp, (char *) mePtr,
mePtr->optionTable, objv[3], menuPtr->tkwin);
if (resultPtr == NULL) {
result = TCL_ERROR;
} else {
result = TCL_OK;
Tcl_SetObjResult(interp, resultPtr);
}
} else {
result = ConfigureMenuCloneEntries(interp, menuPtr, index,
objc-3, objv+3);
}
Tcl_Release(mePtr);
break;
    }
    case MENU_INDEX: {
int index;

if (objc != 3) {
Tcl_WrongNumArgs(interp, 2, objv, "string");
goto error;
}
if (TkGetMenuIndex(interp, menuPtr, objv[2], 0, &index) != TCL_OK) {
goto error;
}
if (index < 0) {
Tcl_SetResult(interp, "none", TCL_STATIC);
} else {
Tcl_SetObjResult(interp, Tcl_NewIntObj(index));
}
break;
    }
    case MENU_INSERT:
if (objc < 4) {
Tcl_WrongNumArgs(interp, 2, objv,
"index type ?-option value ...?");
goto error;
}
if (MenuAddOrInsert(interp,menuPtr,objv[2],objc-3,objv+3) != TCL_OK) {
goto error;
}
break;
    case MENU_INVOKE: {
int index;

if (objc != 3) {
Tcl_WrongNumArgs(interp, 2, objv, "index");
goto error;
}
if (TkGetMenuIndex(interp, menuPtr, objv[2], 0, &index) != TCL_OK) {
goto error;
}
if (index < 0) {
goto done;
}
result = TkInvokeMenu(interp, menuPtr, index);
break;
    }
    case MENU_POST: {
int x, y;

if (objc != 4) {
Tcl_WrongNumArgs(interp, 2, objv, "x y");
goto error;
}
if ((Tcl_GetIntFromObj(interp, objv[2], &x) != TCL_OK)
|| (Tcl_GetIntFromObj(interp, objv[3], &y) != TCL_OK)) {
goto error;
}

/*
* Tearoff menus are posted differently on Mac and Windows than
* non-tearoffs. TkpPostMenu does not actually map the menu's window
* on those platforms, and popup menus have to be handled specially.
*/

if (menuPtr->menuType != TEAROFF_MENU) {
result = TkpPostMenu(interp, menuPtr, x, y);
} else {
result = TkPostTearoffMenu(interp, menuPtr, x, y);
}
break;
    }
    case MENU_POSTCASCADE: {
int index;

if (objc != 3) {
Tcl_WrongNumArgs(interp, 2, objv, "index");
goto error;
}

if (TkGetMenuIndex(interp, menuPtr, objv[2], 0, &index) != TCL_OK) {
goto error;
}
if ((index < 0) || (menuPtr->entries[index]->type != CASCADE_ENTRY)) {
result = TkPostSubmenu(interp, menuPtr, NULL);
} else {
result = TkPostSubmenu(interp, menuPtr, menuPtr->entries[index]);
}
break;
    }
    case MENU_TYPE: {
int index;

if (objc != 3) {
Tcl_WrongNumArgs(interp, 2, objv, "index");
goto error;
}
if (TkGetMenuIndex(interp, menuPtr, objv[2], 0, &index) != TCL_OK) {
goto error;
}
if (index < 0) {
goto done;
}
if (menuPtr->entries[index]->type == TEAROFF_ENTRY) {
Tcl_SetResult(interp, "tearoff", TCL_STATIC);
} else {
Tcl_SetObjResult(interp, Tcl_NewStringObj(
menuEntryTypeStrings[menuPtr->entries[index]->type], -1));
}
break;
    }
    case MENU_UNPOST:
if (objc != 2) {
Tcl_WrongNumArgs(interp, 2, objv, NULL);
goto error;
}
Tk_UnmapWindow(menuPtr->tkwin);
result = TkPostSubmenu(interp, menuPtr, NULL);
break;
    case MENU_XPOSITION:
if (objc != 3) {
Tcl_WrongNumArgs(interp, 2, objv, "index");
goto error;
}
result = MenuDoXPosition(interp, menuPtr, objv[2]);
break;
    case MENU_YPOSITION:
if (objc != 3) {
Tcl_WrongNumArgs(interp, 2, objv, "index");
goto error;
}
result = MenuDoYPosition(interp, menuPtr, objv[2]);
break;
    }
  done:
    Tcl_Release(menuPtr);
    return result;

  error:
    Tcl_Release(menuPtr);
    return TCL_ERROR;
}

/*
*----------------------------------------------------------------------
*
* TkInvokeMenu --
*
* Given a menu and an index, takes the appropriate action for the entry
* associated with that index.
*
* Results:
* Standard Tcl result.
*
* Side effects:
* Commands may get excecuted; variables may get set; sub-menus may get
* posted.
*
*----------------------------------------------------------------------
*/

int
TkInvokeMenu(
    Tcl_Interp *interp, /* The interp that the menu lives in. */
    TkMenu *menuPtr, /* The menu we are invoking. */
    int index) /* The zero based index of the item we are
* invoking. */
{
    int result = TCL_OK;
    TkMenuEntry *mePtr;

    if (index < 0) {
     goto done;
    }
    mePtr = menuPtr->entries[index];
    if (mePtr->state == ENTRY_DISABLED) {
goto done;
    }

    Tcl_Preserve(mePtr);
    if (mePtr->type == TEAROFF_ENTRY) {
Tcl_DString ds;

Tcl_DStringInit(&ds);
Tcl_DStringAppend(&ds, "tk::TearOffMenu ", -1);
Tcl_DStringAppend(&ds, Tk_PathName(menuPtr->tkwin), -1);
result = Tcl_Eval(interp, Tcl_DStringValue(&ds));
Tcl_DStringFree(&ds);
    } else if ((mePtr->type == CHECK_BUTTON_ENTRY)
&& (mePtr->namePtr != NULL)) {
Tcl_Obj *valuePtr;

if (mePtr->entryFlags & ENTRY_SELECTED) {
valuePtr = mePtr->offValuePtr;
} else {
valuePtr = mePtr->onValuePtr;
}
if (valuePtr == NULL) {
valuePtr = Tcl_NewObj();
}
Tcl_IncrRefCount(valuePtr);
if (Tcl_ObjSetVar2(interp, mePtr->namePtr, NULL, valuePtr,
TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG) == NULL) {
result = TCL_ERROR;
}
Tcl_DecrRefCount(valuePtr);
    } else if ((mePtr->type == RADIO_BUTTON_ENTRY)
&& (mePtr->namePtr != NULL)) {
Tcl_Obj *valuePtr = mePtr->onValuePtr;

if (valuePtr == NULL) {
valuePtr = Tcl_NewObj();
}
Tcl_IncrRefCount(valuePtr);
if (Tcl_ObjSetVar2(interp, mePtr->namePtr, NULL, valuePtr,
TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG) == NULL) {
result = TCL_ERROR;
}
Tcl_DecrRefCount(valuePtr);
    }

    /*
* We check numEntries in addition to whether the menu entry has a command
* because that goes to zero if the menu gets deleted (e.g., during
* command evaluation).
*/

    if ((menuPtr->numEntries != 0) && (result == TCL_OK)
&& (mePtr->commandPtr != NULL)) {
Tcl_Obj *commandPtr = mePtr->commandPtr;

Tcl_IncrRefCount(commandPtr);
result = Tcl_EvalObjEx(interp, commandPtr, TCL_EVAL_GLOBAL);
Tcl_DecrRefCount(commandPtr);
    }
    Tcl_Release(mePtr);

  done:
    return result;
}

/*
*----------------------------------------------------------------------
*
* DestroyMenuInstance --
*
* This function is invoked by TkDestroyMenu to clean up the internal
* structure of a menu at a safe time (when no-one is using it anymore).
* Only takes care of one instance of the menu.
*
* Results:
* None.
*
* Side effects:
* Everything associated with the menu is freed up.
*
*----------------------------------------------------------------------
*/

static void
DestroyMenuInstance(
    TkMenu *menuPtr) /* Info about menu widget. */
{
    int i;
    TkMenu *menuInstancePtr;
    TkMenuEntry *cascadePtr, *nextCascadePtr;
    Tcl_Obj *newObjv[2];
    TkMenu *parentMasterMenuPtr;
    TkMenuEntry *parentMasterEntryPtr;

    /*
* If the menu has any cascade menu entries pointing to it, the cascade
* entries need to be told that the menu is going away. We need to clear
* the menu ptr field in the menu reference at this point in the code so
* that everything else can forget about this menu properly. We also need
* to reset -menu field of all entries that are not master menus back to
* this entry name if this is a master menu pointed to by another master
* menu. If there is a clone menu that points to this menu, then this menu
* is itself a clone, so when this menu goes away, the -menu field of the
* pointing entry must be set back to this menu's master menu name so that
* later if another menu is created the cascade hierarchy can be
* maintained.
*/

    TkpDestroyMenu(menuPtr);
    if (menuPtr->menuRefPtr == NULL) {
return;
    }
    cascadePtr = menuPtr->menuRefPtr->parentEntryPtr;
    menuPtr->menuRefPtr->menuPtr = NULL;
    if (TkFreeMenuReferences(menuPtr->menuRefPtr)) {
menuPtr->menuRefPtr = NULL;
    }

    for (; cascadePtr != NULL; cascadePtr = nextCascadePtr) {
     nextCascadePtr = cascadePtr->nextCascadePtr;

     if (menuPtr->masterMenuPtr != menuPtr) {
Tcl_Obj *menuNamePtr = Tcl_NewStringObj("-menu", -1);

parentMasterMenuPtr = cascadePtr->menuPtr->masterMenuPtr;
parentMasterEntryPtr =
parentMasterMenuPtr->entries[cascadePtr->index];
newObjv[0] = menuNamePtr;
newObjv[1] = parentMasterEntryPtr->namePtr;

/*
* It is possible that the menu info is out of sync, and these
* things point to NULL, so verify existence [Bug: 3402]
*/

if (newObjv[0] && newObjv[1]) {
Tcl_IncrRefCount(newObjv[0]);
Tcl_IncrRefCount(newObjv[1]);
ConfigureMenuEntry(cascadePtr, 2, newObjv);
Tcl_DecrRefCount(newObjv[0]);
Tcl_DecrRefCount(newObjv[1]);
}
     } else {
     ConfigureMenuEntry(cascadePtr, 0, NULL);
     }
    }

    if (menuPtr->masterMenuPtr != menuPtr) {
for (menuInstancePtr = menuPtr->masterMenuPtr;
menuInstancePtr != NULL;
menuInstancePtr = menuInstancePtr->nextInstancePtr) {
if (menuInstancePtr->nextInstancePtr == menuPtr) {
menuInstancePtr->nextInstancePtr =
menuInstancePtr->nextInstancePtr->nextInstancePtr;
break;
}
}
    } else if (menuPtr->nextInstancePtr != NULL) {
Tcl_Panic("Attempting to delete master menu when there are still clones");
    }

    /*
* Free up all the stuff that requires special handling, then let
* Tk_FreeConfigOptions handle all the standard option-related stuff.
*/

    for (i = menuPtr->numEntries; --i >= 0; ) {
/*
* As each menu entry is deleted from the end of the array of entries,
* decrement menuPtr->numEntries. Otherwise, the act of deleting menu
* entry i will dereference freed memory attempting to queue a redraw
* for menu entries (i+1)...numEntries.
*/

DestroyMenuEntry((char *) menuPtr->entries[i]);
menuPtr->numEntries = i;
    }
    if (menuPtr->entries != NULL) {
ckfree(menuPtr->entries);
    }
    TkMenuFreeDrawOptions(menuPtr);
    Tk_FreeConfigOptions((char *) menuPtr,
menuPtr->optionTablesPtr->menuOptionTable, menuPtr->tkwin);
    if (menuPtr->tkwin != NULL) {
Tk_Window tkwin = menuPtr->tkwin;

menuPtr->tkwin = NULL;
Tk_DestroyWindow(tkwin);
    }
}

/*
*----------------------------------------------------------------------
*
* TkDestroyMenu --
*
* This function is invoked by Tcl_EventuallyFree or Tcl_Release to clean
* up the internal structure of a menu at a safe time (when no-one is
* using it anymore). If called on a master instance, destroys all of the
* slave instances. If called on a non-master instance, just destroys
* that instance.
*
* Results:
* None.
*
* Side effects:
* Everything associated with the menu is freed up.
*
*----------------------------------------------------------------------
*/

void
TkDestroyMenu(
    TkMenu *menuPtr) /* Info about menu widget. */
{
    TkMenu *menuInstancePtr;
    TkMenuTopLevelList *topLevelListPtr, *nextTopLevelPtr;

    if (menuPtr->menuFlags & MENU_DELETION_PENDING) {
     return;
    }

    Tcl_Preserve(menuPtr);

    /*
* Now destroy all non-tearoff instances of this menu if this is a parent
* menu. Is this loop safe enough? Are there going to be destroy bindings
* on child menus which kill the parent? If not, we have to do a slightly
* more complex scheme.
*/

    menuPtr->menuFlags |= MENU_DELETION_PENDING;
    if (menuPtr->menuRefPtr != NULL) {
/*
* If any toplevel widgets have this menu as their menubar, the
* geometry of the window may have to be recalculated.
*/

topLevelListPtr = menuPtr->menuRefPtr->topLevelListPtr;
while (topLevelListPtr != NULL) {
nextTopLevelPtr = topLevelListPtr->nextPtr;
TkpSetWindowMenuBar(topLevelListPtr->tkwin, NULL);
topLevelListPtr = nextTopLevelPtr;
}
    }
    if (menuPtr->masterMenuPtr == menuPtr) {
while (menuPtr->nextInstancePtr != NULL) {
menuInstancePtr = menuPtr->nextInstancePtr;
menuPtr->nextInstancePtr = menuInstancePtr->nextInstancePtr;
     if (menuInstancePtr->tkwin != NULL) {
Tk_Window tkwin = menuInstancePtr->tkwin;

/*
* Note: it may be desirable to NULL out the tkwin field of
* menuInstancePtr here:
* menuInstancePtr->tkwin = NULL;
*/

Tk_DestroyWindow(tkwin);
}
}
    }

    DestroyMenuInstance(menuPtr);

    Tcl_Release(menuPtr);
}

/*
*----------------------------------------------------------------------
*
* UnhookCascadeEntry --
*
* This entry is removed from the list of entries that point to the
* cascade menu. This is done in preparation for changing the menu that
* this entry points to.
*
* At the end of this function, the menu entry no longer contains a
* reference to a 'TkMenuReferences' structure, and therefore no such
* structure contains a reference to this menu entry either.
*
* Results:
* None
*
* Side effects:
* The appropriate lists are modified.
*
*----------------------------------------------------------------------
*/

static void
UnhookCascadeEntry(
    TkMenuEntry *mePtr) /* The cascade entry we are removing from the
* cascade list. */
{
    TkMenuEntry *cascadeEntryPtr;
    TkMenuEntry *prevCascadePtr;
    TkMenuReferences *menuRefPtr;

    menuRefPtr = mePtr->childMenuRefPtr;
    if (menuRefPtr == NULL) {
return;
    }

    cascadeEntryPtr = menuRefPtr->parentEntryPtr;
    if (cascadeEntryPtr == NULL) {
TkFreeMenuReferences(menuRefPtr);
mePtr->childMenuRefPtr = NULL;
     return;
    }

    /*
* Singularly linked list deletion. The two special cases are 1. one
* element; 2. The first element is the one we want.
*/

    if (cascadeEntryPtr == mePtr) {
     if (cascadeEntryPtr->nextCascadePtr == NULL) {
/*
* This is the last menu entry which points to this menu, so we
* need to clear out the list pointer in the cascade itself.
*/

menuRefPtr->parentEntryPtr = NULL;

/*
* The original field is set to zero below, after it is freed.
*/

TkFreeMenuReferences(menuRefPtr);
     } else {
     menuRefPtr->parentEntryPtr = cascadeEntryPtr->nextCascadePtr;
     }
     mePtr->nextCascadePtr = NULL;
    } else {
for (prevCascadePtr = cascadeEntryPtr,
cascadeEntryPtr = cascadeEntryPtr->nextCascadePtr;
cascadeEntryPtr != NULL;
prevCascadePtr = cascadeEntryPtr,
cascadeEntryPtr = cascadeEntryPtr->nextCascadePtr) {
     if (cascadeEntryPtr == mePtr){
     prevCascadePtr->nextCascadePtr =
cascadeEntryPtr->nextCascadePtr;
     cascadeEntryPtr->nextCascadePtr = NULL;
     break;
     }
}
mePtr->nextCascadePtr = NULL;
    }
    mePtr->childMenuRefPtr = NULL;
}

/*
*----------------------------------------------------------------------
*
* DestroyMenuEntry --
*
* This function is invoked by Tcl_EventuallyFree or Tcl_Release to clean
* up the internal structure of a menu entry at a safe time (when no-one
* is using it anymore).
*
* Results:
* None.
*
* Side effects:
* Everything associated with the menu entry is freed.
*
*----------------------------------------------------------------------
*/

static void
DestroyMenuEntry(
    char *memPtr) /* Pointer to entry to be freed. */
{
    register TkMenuEntry *mePtr = (TkMenuEntry *) memPtr;
    TkMenu *menuPtr = mePtr->menuPtr;

    if (menuPtr->postedCascade == mePtr) {
     /*
* Ignore errors while unposting the menu, since it's possible that
* the menu has already been deleted and the unpost will generate an
* error.
*/

TkPostSubmenu(menuPtr->interp, menuPtr, NULL);
    }

    /*
* Free up all the stuff that requires special handling, then let
* Tk_FreeConfigOptions handle all the standard option-related stuff.
*/

    if (mePtr->type == CASCADE_ENTRY) {
if (menuPtr->masterMenuPtr != menuPtr) {
TkMenu *destroyThis = NULL;
TkMenuReferences *menuRefPtr = mePtr->childMenuRefPtr;

/*
* The menu as a whole is a clone. We must delete the clone of the
* cascaded menu for the particular entry we are destroying.
*/

if (menuRefPtr != NULL) {
destroyThis = menuRefPtr->menuPtr;

/*
* But only if it is a clone. What can happen is that we are
* in the middle of deleting a menu and this menu pointer has
* already been reset to point to the original menu. In that
* case we have nothing special to do.
*/

if ((destroyThis != NULL)
&& (destroyThis->masterMenuPtr == destroyThis)) {
destroyThis = NULL;
}
}
UnhookCascadeEntry(mePtr);
if (menuRefPtr != NULL) {
if (menuRefPtr->menuPtr == destroyThis) {
menuRefPtr->menuPtr = NULL;
}
if (destroyThis != NULL) {
TkDestroyMenu(destroyThis);
}
}
} else {
UnhookCascadeEntry(mePtr);
}
    }
    if (mePtr->image != NULL) {
Tk_FreeImage(mePtr->image);
    }
    if (mePtr->selectImage != NULL) {
Tk_FreeImage(mePtr->selectImage);
    }
    if (((mePtr->type == CHECK_BUTTON_ENTRY)
|| (mePtr->type == RADIO_BUTTON_ENTRY))
&& (mePtr->namePtr != NULL)) {
const char *varName = Tcl_GetString(mePtr->namePtr);

Tcl_UntraceVar(menuPtr->interp, varName,
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
MenuVarProc, mePtr);
    }
    TkpDestroyMenuEntry(mePtr);
    TkMenuEntryFreeDrawOptions(mePtr);
    Tk_FreeConfigOptions((char *) mePtr, mePtr->optionTable, menuPtr->tkwin);
    ckfree(mePtr);
}

/*
*---------------------------------------------------------------------------
*
* MenuWorldChanged --
*
* This function is called when the world has changed in some way (such
* as the fonts in the system changing) and the widget needs to recompute
* all its graphics contexts and determine its new geometry.
*
* Results:
* None.
*
* Side effects:
* Menu will be relayed out and redisplayed.
*
*---------------------------------------------------------------------------
*/

static void
MenuWorldChanged(
    ClientData instanceData) /* Information about widget. */
{
    TkMenu *menuPtr = instanceData;
    int i;

    TkMenuConfigureDrawOptions(menuPtr);
    for (i = 0; i < menuPtr->numEntries; i++) {
     TkMenuConfigureEntryDrawOptions(menuPtr->entries[i],
menuPtr->entries[i]->index);
TkpConfigureMenuEntry(menuPtr->entries[i]);
    }
    TkEventuallyRecomputeMenu(menuPtr);
}

/*
*----------------------------------------------------------------------
*
* ConfigureMenu --
*
* This function is called to process an argv/argc list, plus the Tk
* option database, in order to configure (or reconfigure) a menu widget.
*
* Results:
* The return value is a standard Tcl result. If TCL_ERROR is returned,
* then the interp's result contains an error message.
*
* Side effects:
* Configuration information, such as colors, font, etc. get set for
* menuPtr; old resources get freed, if there were any.
*
*----------------------------------------------------------------------
*/

static int
ConfigureMenu(
    Tcl_Interp *interp, /* Used for error reporting. */
    register TkMenu *menuPtr, /* Information about widget; may or may not
* already have values for some fields. */
    int objc, /* Number of valid entries in argv. */
    Tcl_Obj *const objv[]) /* Arguments. */
{
    int i;
    TkMenu *menuListPtr, *cleanupPtr;
    int result;

    for (menuListPtr = menuPtr->masterMenuPtr; menuListPtr != NULL;
menuListPtr = menuListPtr->nextInstancePtr) {
menuListPtr->errorStructPtr = ckalloc(sizeof(Tk_SavedOptions));
result = Tk_SetOptions(interp, (char *) menuListPtr,
menuListPtr->optionTablesPtr->menuOptionTable, objc, objv,
menuListPtr->tkwin, menuListPtr->errorStructPtr, NULL);
if (result != TCL_OK) {
for (cleanupPtr = menuPtr->masterMenuPtr;
cleanupPtr != menuListPtr;
cleanupPtr = cleanupPtr->nextInstancePtr) {
Tk_RestoreSavedOptions(cleanupPtr->errorStructPtr);
ckfree(cleanupPtr->errorStructPtr);
cleanupPtr->errorStructPtr = NULL;
}
if (menuListPtr->errorStructPtr != NULL) {
Tk_RestoreSavedOptions(menuListPtr->errorStructPtr);
ckfree(menuListPtr->errorStructPtr);
menuListPtr->errorStructPtr = NULL;
}
return TCL_ERROR;
}

/*
* When a menu is created, the type is in all of the arguments to the
* menu command. Let Tk_ConfigureWidget take care of parsing them, and
* then set the type after we can look at the type string. Once set, a
* menu's type cannot be changed
*/

if (menuListPtr->menuType == UNKNOWN_TYPE) {
Tcl_GetIndexFromObj(NULL, menuListPtr->menuTypePtr,
menuTypeStrings, NULL, 0, &menuListPtr->menuType);

/*
* Configure the new window to be either a pop-up menu or a
* tear-off menu. We don't do this for menubars since they are not
* toplevel windows. Also, since this gets called before CloneMenu
* has a chance to set the menuType field, we have to look at the
* menuTypeName field to tell that this is a menu bar.
*/

if (menuListPtr->menuType == MASTER_MENU) {
int typeFlag = TK_MAKE_MENU_POPUP;
Tk_Window tkwin = menuPtr->tkwin;

/*
* Work out if we are the child of a menubar or a popup.
*/

while (1) {
Tk_Window parent = Tk_Parent(tkwin);

if (Tk_Class(parent) != Tk_Class(menuPtr->tkwin)) {
break;
}
tkwin = parent;
}
if (((TkMenu *) tkwin)->menuType == MENUBAR) {
typeFlag = TK_MAKE_MENU_DROPDOWN;
}

TkpMakeMenuWindow(menuListPtr->tkwin, typeFlag);
} else if (menuListPtr->menuType == TEAROFF_MENU) {
TkpMakeMenuWindow(menuListPtr->tkwin, TK_MAKE_MENU_TEAROFF);
}
}

/*
* Depending on the -tearOff option, make sure that there is or isn't
* an initial tear-off entry at the beginning of the menu.
*/

if (menuListPtr->tearoff) {
if ((menuListPtr->numEntries == 0)
|| (menuListPtr->entries[0]->type != TEAROFF_ENTRY)) {
if (MenuNewEntry(menuListPtr, 0, TEAROFF_ENTRY) == NULL) {
for (cleanupPtr = menuPtr->masterMenuPtr;
cleanupPtr != menuListPtr;
cleanupPtr = cleanupPtr->nextInstancePtr) {
Tk_RestoreSavedOptions(cleanupPtr->errorStructPtr);
ckfree(cleanupPtr->errorStructPtr);
cleanupPtr->errorStructPtr = NULL;
}
if (menuListPtr->errorStructPtr != NULL) {
Tk_RestoreSavedOptions(menuListPtr->errorStructPtr);
ckfree(menuListPtr->errorStructPtr);
menuListPtr->errorStructPtr = NULL;
}
return TCL_ERROR;
}
}
} else if ((menuListPtr->numEntries > 0)
&& (menuListPtr->entries[0]->type == TEAROFF_ENTRY)) {
int i;

Tcl_EventuallyFree(menuListPtr->entries[0], DestroyMenuEntry);

for (i = 0; i < menuListPtr->numEntries - 1; i++) {
menuListPtr->entries[i] = menuListPtr->entries[i + 1];
menuListPtr->entries[i]->index = i;
}
menuListPtr->numEntries--;
if (menuListPtr->numEntries == 0) {
ckfree(menuListPtr->entries);
menuListPtr->entries = NULL;
}
}

TkMenuConfigureDrawOptions(menuListPtr);

/*
* After reconfiguring a menu, we need to reconfigure all of the
* entries in the menu, since some of the things in the children (such
* as graphics contexts) may have to change to reflect changes in the
* parent.
*/

for (i = 0; i < menuListPtr->numEntries; i++) {
TkMenuEntry *mePtr;

mePtr = menuListPtr->entries[i];
ConfigureMenuEntry(mePtr, 0, NULL);
}

TkEventuallyRecomputeMenu(menuListPtr);
    }

    for (cleanupPtr = menuPtr->masterMenuPtr; cleanupPtr != NULL;
cleanupPtr = cleanupPtr->nextInstancePtr) {
Tk_FreeSavedOptions(cleanupPtr->errorStructPtr);
ckfree(cleanupPtr->errorStructPtr);
cleanupPtr->errorStructPtr = NULL;
    }

    return TCL_OK;
}

/*
*----------------------------------------------------------------------
*
* PostProcessEntry --
*
* This is called by ConfigureMenuEntry to do all of the configuration
* after Tk_SetOptions is called. This is separate so that error handling
* is easier.
*
* Results:
* The return value is a standard Tcl result. If TCL_ERROR is returned,
* then the interp's result contains an error message.
*
* Side effects:
* Configuration information such as label and accelerator get set for
* mePtr; old resources get freed, if there were any.
*
*----------------------------------------------------------------------
*/

static int
PostProcessEntry(
    TkMenuEntry *mePtr) /* The entry we are configuring. */
{
    TkMenu *menuPtr = mePtr->menuPtr;
    int index = mePtr->index;
    const char *name;
    Tk_Image image;

    /*
* The code below handles special configuration stuff not taken care of by
* Tk_ConfigureWidget, such as special processing for defaults, sizing
* strings, graphics contexts, etc.
*/

    if (mePtr->labelPtr == NULL) {
mePtr->labelLength = 0;
    } else {
Tcl_GetStringFromObj(mePtr->labelPtr, &mePtr->labelLength);
    }
    if (mePtr->accelPtr == NULL) {
mePtr->accelLength = 0;
    } else {
Tcl_GetStringFromObj(mePtr->accelPtr, &mePtr->accelLength);
    }

    /*
* If this is a cascade entry, the platform-specific data of the child
* menu has to be updated. Also, the links that point to parents and
* cascades have to be updated.
*/

    if ((mePtr->type == CASCADE_ENTRY) && (mePtr->namePtr != NULL)) {
  TkMenuEntry *cascadeEntryPtr;
int alreadyThere;
TkMenuReferences *menuRefPtr;
char *oldHashKey = NULL; /* Initialization only needed to
* prevent compiler warning. */

/*
* This is a cascade entry. If the menu that the cascade entry is
* pointing to has changed, we need to remove this entry from the list
* of entries pointing to the old menu, and add a cascade reference to
* the list of entries pointing to the new menu.
*
* BUG: We are not recloning for special case #3 yet.
*/

name = Tcl_GetString(mePtr->namePtr);
if (mePtr->childMenuRefPtr != NULL) {
oldHashKey = Tcl_GetHashKey(TkGetMenuHashTable(menuPtr->interp),
mePtr->childMenuRefPtr->hashEntryPtr);
if (strcmp(oldHashKey, name) != 0) {
UnhookCascadeEntry(mePtr);
}
}

if ((mePtr->childMenuRefPtr == NULL)
|| (strcmp(oldHashKey, name) != 0)) {
menuRefPtr = TkCreateMenuReferences(menuPtr->interp, name);
mePtr->childMenuRefPtr = menuRefPtr;

if (menuRefPtr->parentEntryPtr == NULL) {
menuRefPtr->parentEntryPtr = mePtr;
} else {
alreadyThere = 0;
for (cascadeEntryPtr = menuRefPtr->parentEntryPtr;
cascadeEntryPtr != NULL;
cascadeEntryPtr =
cascadeEntryPtr->nextCascadePtr) {
if (cascadeEntryPtr == mePtr) {
alreadyThere = 1;
break;
}
}

/*
* Put the item at the front of the list.
*/

if (!alreadyThere) {
mePtr->nextCascadePtr = menuRefPtr->parentEntryPtr;
menuRefPtr->parentEntryPtr = mePtr;
}
}
}
    }

    if (TkMenuConfigureEntryDrawOptions(mePtr, index) != TCL_OK) {
     return TCL_ERROR;
    }

    /*
* Get the images for the entry, if there are any. Allocate the new images
* before freeing the old ones, so that the reference counts don't go to
* zero and cause image data to be discarded.
*/

    if (mePtr->imagePtr != NULL) {
const char *imageString = Tcl_GetString(mePtr->imagePtr);

image = Tk_GetImage(menuPtr->interp, menuPtr->tkwin, imageString,
TkMenuImageProc, mePtr);
if (image == NULL) {
return TCL_ERROR;
}
    } else {
image = NULL;
    }
    if (mePtr->image != NULL) {
Tk_FreeImage(mePtr->image);
    }
    mePtr->image = image;
    if (mePtr->selectImagePtr != NULL) {
const char *selectImageString = Tcl_GetString(mePtr->selectImagePtr);

image = Tk_GetImage(menuPtr->interp, menuPtr->tkwin, selectImageString,
TkMenuSelectImageProc, mePtr);
if (image == NULL) {
return TCL_ERROR;
}
    } else {
image = NULL;
    }
    if (mePtr->selectImage != NULL) {
Tk_FreeImage(mePtr->selectImage);
    }
    mePtr->selectImage = image;

    if ((mePtr->type == CHECK_BUTTON_ENTRY)
|| (mePtr->type == RADIO_BUTTON_ENTRY)) {
Tcl_Obj *valuePtr;
const char *name;

if (mePtr->namePtr == NULL) {
if (mePtr->labelPtr == NULL) {
mePtr->namePtr = NULL;
} else {
mePtr->namePtr = Tcl_DuplicateObj(mePtr->labelPtr);
Tcl_IncrRefCount(mePtr->namePtr);
}
}
if (mePtr->onValuePtr == NULL) {
if (mePtr->labelPtr == NULL) {
mePtr->onValuePtr = NULL;
} else {
mePtr->onValuePtr = Tcl_DuplicateObj(mePtr->labelPtr);
Tcl_IncrRefCount(mePtr->onValuePtr);
}
}

/*
* Select the entry if the associated variable has the appropriate
* value, initialize the variable if it doesn't exist, then set a
* trace on the variable to monitor future changes to its value.
*/

if (mePtr->namePtr != NULL) {
valuePtr = Tcl_ObjGetVar2(menuPtr->interp, mePtr->namePtr, NULL,
TCL_GLOBAL_ONLY);
} else {
valuePtr = NULL;
}
mePtr->entryFlags &= ~ENTRY_SELECTED;
if (valuePtr != NULL) {
if (mePtr->onValuePtr != NULL) {
const char *value = Tcl_GetString(valuePtr);
const char *onValue = Tcl_GetString(mePtr->onValuePtr);

if (strcmp(value, onValue) == 0) {
mePtr->entryFlags |= ENTRY_SELECTED;
}
}
} else {
if (mePtr->namePtr != NULL) {
Tcl_ObjSetVar2(menuPtr->interp, mePtr->namePtr, NULL,
(mePtr->type == CHECK_BUTTON_ENTRY)
? mePtr->offValuePtr : Tcl_NewObj(), TCL_GLOBAL_ONLY);
}
}
if (mePtr->namePtr != NULL) {
name = Tcl_GetString(mePtr->namePtr);
Tcl_TraceVar(menuPtr->interp, name,
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
MenuVarProc, mePtr);
}
    }

    if (TkpConfigureMenuEntry(mePtr) != TCL_OK) {
return TCL_ERROR;
    }

    return TCL_OK;
}

/*
*----------------------------------------------------------------------
*
* ConfigureMenuEntry --
*
* This function is called to process an argv/argc list in order to
* configure (or reconfigure) one entry in a menu.
*
* Results:
* The return value is a standard Tcl result. If TCL_ERROR is returned,
* then the interp's result contains an error message.
*
* Side effects:
* Configuration information such as label and accelerator get set for
* mePtr; old resources get freed, if there were any.
*
*----------------------------------------------------------------------
*/

static int
ConfigureMenuEntry(
    register TkMenuEntry *mePtr,/* Information about menu entry; may or may
* not already have values for some fields. */
    int objc, /* Number of valid entries in argv. */
    Tcl_Obj *const objv[]) /* Arguments. */
{
    TkMenu *menuPtr = mePtr->menuPtr;
    Tk_SavedOptions errorStruct;
    int result;

    /*
* If this entry is a check button or radio button, then remove its old
* trace function.
*/

    if ((mePtr->namePtr != NULL)
     && ((mePtr->type == CHECK_BUTTON_ENTRY)
|| (mePtr->type == RADIO_BUTTON_ENTRY))) {
const char *name = Tcl_GetString(mePtr->namePtr);

Tcl_UntraceVar(menuPtr->interp, name,
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
MenuVarProc, mePtr);
    }

    result = TCL_OK;
    if (menuPtr->tkwin != NULL) {
if (Tk_SetOptions(menuPtr->interp, (char *) mePtr,
mePtr->optionTable, objc, objv, menuPtr->tkwin,
&errorStruct, NULL) != TCL_OK) {
return TCL_ERROR;
}
result = PostProcessEntry(mePtr);
if (result != TCL_OK) {
Tk_RestoreSavedOptions(&errorStruct);
PostProcessEntry(mePtr);
}
Tk_FreeSavedOptions(&errorStruct);
    }

    TkEventuallyRecomputeMenu(menuPtr);

    return result;
}

/*
*----------------------------------------------------------------------
*
* ConfigureMenuCloneEntries --
*
* Calls ConfigureMenuEntry for each menu in the clone chain.
*
* Results:
* The return value is a standard Tcl result. If TCL_ERROR is returned,
* then the interp's result contains an error message.
*
* Side effects:
* Configuration information such as label and accelerator get set for
* mePtr; old resources get freed, if there were any.
*
*----------------------------------------------------------------------
*/

static int
ConfigureMenuCloneEntries(
    Tcl_Interp *interp, /* Used for error reporting. */
    TkMenu *menuPtr, /* Information about whole menu. */
    int index, /* Index of mePtr within menuPtr's entries. */
    int objc, /* Number of valid entries in argv. */
    Tcl_Obj *const objv[]) /* Arguments. */
{
    TkMenuEntry *mePtr;
    TkMenu *menuListPtr;
    int cascadeEntryChanged = 0;
    TkMenuReferences *oldCascadeMenuRefPtr, *cascadeMenuRefPtr = NULL;
    Tcl_Obj *oldCascadePtr = NULL;
    const char *newCascadeName;

    /*
* Cascades are kind of tricky here. This is special case #3 in the
* comment at the top of this file. Basically, if a menu is the master
* menu of a clone chain, and has an entry with a cascade menu, the clones
* of the menu will point to clones of the cascade menu. We have to
* destroy the clones of the cascades, clone the new cascade menu, and
* configure the entry to point to the new clone.
*/

    mePtr = menuPtr->masterMenuPtr->entries[index];
    if (mePtr->type == CASCADE_ENTRY) {
oldCascadePtr = mePtr->namePtr;
if (oldCascadePtr != NULL) {
Tcl_IncrRefCount(oldCascadePtr);
}
    }

    if (ConfigureMenuEntry(mePtr, objc, objv) != TCL_OK) {
return TCL_ERROR;
    }

    if (mePtr->type == CASCADE_ENTRY) {
const char *oldCascadeName;

if (mePtr->namePtr != NULL) {
newCascadeName = Tcl_GetString(mePtr->namePtr);
} else {
newCascadeName = NULL;
}

if ((oldCascadePtr == NULL) && (mePtr->namePtr == NULL)) {
cascadeEntryChanged = 0;
} else if (((oldCascadePtr == NULL) && (mePtr->namePtr != NULL))
|| ((oldCascadePtr != NULL)
&& (mePtr->namePtr == NULL))) {
cascadeEntryChanged = 1;
} else {
oldCascadeName = Tcl_GetString(oldCascadePtr);
cascadeEntryChanged = (strcmp(oldCascadeName, newCascadeName)
!= 0);
}
if (oldCascadePtr != NULL) {
Tcl_DecrRefCount(oldCascadePtr);
}
    }

    if (cascadeEntryChanged) {
if (mePtr->namePtr != NULL) {
newCascadeName = Tcl_GetString(mePtr->namePtr);
cascadeMenuRefPtr = TkFindMenuReferences(menuPtr->interp,
newCascadeName);
}
    }

    for (menuListPtr = menuPtr->masterMenuPtr->nextInstancePtr;
     menuListPtr != NULL;
menuListPtr = menuListPtr->nextInstancePtr) {

     mePtr = menuListPtr->entries[index];

if (cascadeEntryChanged && (mePtr->namePtr != NULL)) {
oldCascadeMenuRefPtr = TkFindMenuReferencesObj(menuPtr->interp,
mePtr->namePtr);

if ((oldCascadeMenuRefPtr != NULL)
&& (oldCascadeMenuRefPtr->menuPtr != NULL)) {
RecursivelyDeleteMenu(oldCascadeMenuRefPtr->menuPtr);
}
}

     if (ConfigureMenuEntry(mePtr, objc, objv) != TCL_OK) {
     return TCL_ERROR;
     }

if (cascadeEntryChanged && (mePtr->namePtr != NULL)) {
if (cascadeMenuRefPtr && cascadeMenuRefPtr->menuPtr != NULL) {
Tcl_Obj *newObjv[2];
Tcl_Obj *newCloneNamePtr;
Tcl_Obj *pathNamePtr = Tcl_NewStringObj(
Tk_PathName(menuListPtr->tkwin), -1);
Tcl_Obj *normalPtr = Tcl_NewStringObj("normal", -1);
Tcl_Obj *menuObjPtr = Tcl_NewStringObj("-menu", -1);

Tcl_IncrRefCount(pathNamePtr);
newCloneNamePtr = TkNewMenuName(menuPtr->interp,
pathNamePtr,
cascadeMenuRefPtr->menuPtr);
Tcl_IncrRefCount(newCloneNamePtr);
Tcl_IncrRefCount(normalPtr);
CloneMenu(cascadeMenuRefPtr->menuPtr, newCloneNamePtr,
normalPtr);

newObjv[0] = menuObjPtr;
newObjv[1] = newCloneNamePtr;
Tcl_IncrRefCount(menuObjPtr);
ConfigureMenuEntry(mePtr, 2, newObjv);
Tcl_DecrRefCount(newCloneNamePtr);
Tcl_DecrRefCount(pathNamePtr);
Tcl_DecrRefCount(normalPtr);
Tcl_DecrRefCount(menuObjPtr);
}
}
    }
    return TCL_OK;
}

/*
*--------------------------------------------------------------
*
* TkGetMenuIndex --
*
* Parse a textual index into a menu and return the numerical index of
* the indicated entry.
*
* Results:
* A standard Tcl result. If all went well, then *indexPtr is filled in
* with the entry index corresponding to string (ranges from -1 to the
* number of entries in the menu minus one). Otherwise an error message
* is left in the interp's result.
*
* Side effects:
* None.
*
*--------------------------------------------------------------
*/

int
TkGetMenuIndex(
    Tcl_Interp *interp, /* For error messages. */
    TkMenu *menuPtr, /* Menu for which the index is being
* specified. */
    Tcl_Obj *objPtr, /* Specification of an entry in menu. See
* manual entry for valid .*/
    int lastOK, /* Non-zero means its OK to return index just
* *after* last entry. */
    int *indexPtr) /* Where to store converted index. */
{
    int i;
    const char *string = Tcl_GetString(objPtr);

    if ((string[0] == 'a') && (strcmp(string, "active") == 0)) {
*indexPtr = menuPtr->active;
goto success;
    }

    if (((string[0] == 'l') && (strcmp(string, "last") == 0))
|| ((string[0] == 'e') && (strcmp(string, "end") == 0))) {
*indexPtr = menuPtr->numEntries - ((lastOK) ? 0 : 1);
goto success;
    }

    if ((string[0] == 'n') && (strcmp(string, "none") == 0)) {
*indexPtr = -1;
goto success;
    }

    if (string[0] == '@') {
if (GetIndexFromCoords(interp, menuPtr, string, indexPtr)
== TCL_OK) {
goto success;
}
    }

    if (isdigit(UCHAR(string[0]))) {
if (Tcl_GetInt(interp, string, &i) == TCL_OK) {
if (i >= menuPtr->numEntries) {
if (lastOK) {
i = menuPtr->numEntries;
} else {
i = menuPtr->numEntries-1;
}
} else if (i < 0) {
i = -1;
}
*indexPtr = i;
goto success;
}
Tcl_ResetResult(interp);
    }

    for (i = 0; i < menuPtr->numEntries; i++) {
Tcl_Obj *labelPtr = menuPtr->entries[i]->labelPtr;
const char *label = (labelPtr == NULL) ? NULL : Tcl_GetString(labelPtr);

if ((label != NULL) && (Tcl_StringMatch(label, string))) {
*indexPtr = i;
goto success;
}
    }

    Tcl_AppendResult(interp, "bad menu entry index \"", string, "\"", NULL);
    return TCL_ERROR;

  success:
    return TCL_OK;
}

/*
*----------------------------------------------------------------------
*
* MenuCmdDeletedProc --
*
* This function is invoked when a widget command is deleted. If the
* widget isn't already in the process of being destroyed, this command
* destroys it.
*
* Results:
* None.
*
* Side effects:
* The widget is destroyed.
*
*----------------------------------------------------------------------
*/

static void
MenuCmdDeletedProc(
    ClientData clientData) /* Pointer to widget record for widget. */
{
    TkMenu *menuPtr = clientData;
    Tk_Window tkwin = menuPtr->tkwin;

    /*
* This function could be invoked either because the window was destroyed
* and the command was then deleted (in which case tkwin is NULL) or
* because the command was deleted, and then this function destroys the
* widget.
*/

    if (tkwin != NULL) {
/*
* Note: it may be desirable to NULL out the tkwin field of menuPtr
* here:
* menuPtr->tkwin = NULL;
*/

Tk_DestroyWindow(tkwin);
    }
}

/*
*----------------------------------------------------------------------
*
* MenuNewEntry --
*
* This function allocates and initializes a new menu entry.
*
* Results:
* The return value is a pointer to a new menu entry structure, which has
* been malloc-ed, initialized, and entered into the entry array for the
* menu.
*
* Side effects:
* Storage gets allocated.
*
*----------------------------------------------------------------------
*/

static TkMenuEntry *
MenuNewEntry(
    TkMenu *menuPtr, /* Menu that will hold the new entry. */
    int index, /* Where in the menu the new entry is to
* go. */
    int type) /* The type of the new entry. */
{
    TkMenuEntry *mePtr;
    TkMenuEntry **newEntries;
    int i;

    /*
* Create a new array of entries with an empty slot for the new entry.
*/

    newEntries = ckalloc((menuPtr->numEntries+1) * sizeof(TkMenuEntry *));
    for (i = 0; i < index; i++) {
newEntries[i] = menuPtr->entries[i];
    }
    for (; i < menuPtr->numEntries; i++) {
newEntries[i+1] = menuPtr->entries[i];
newEntries[i+1]->index = i + 1;
    }
    if (menuPtr->numEntries != 0) {
ckfree(menuPtr->entries);
    }
    menuPtr->entries = newEntries;
    menuPtr->numEntries++;
    mePtr = ckalloc(sizeof(TkMenuEntry));
    menuPtr->entries[index] = mePtr;
    mePtr->type = type;
    mePtr->optionTable = menuPtr->optionTablesPtr->entryOptionTables[type];
    mePtr->menuPtr = menuPtr;
    mePtr->labelPtr = NULL;
    mePtr->labelLength = 0;
    mePtr->underline = -1;
    mePtr->bitmapPtr = NULL;
    mePtr->imagePtr = NULL;
    mePtr->image = NULL;
    mePtr->selectImagePtr = NULL;
    mePtr->selectImage = NULL;
    mePtr->accelPtr = NULL;
    mePtr->accelLength = 0;
    mePtr->state = ENTRY_DISABLED;
    mePtr->borderPtr = NULL;
    mePtr->fgPtr = NULL;
    mePtr->activeBorderPtr = NULL;
    mePtr->activeFgPtr = NULL;
    mePtr->fontPtr = NULL;
    mePtr->indicatorOn = 0;
    mePtr->indicatorFgPtr = NULL;
    mePtr->columnBreak = 0;
    mePtr->hideMargin = 0;
    mePtr->commandPtr = NULL;
    mePtr->namePtr = NULL;
    mePtr->childMenuRefPtr = NULL;
    mePtr->onValuePtr = NULL;
    mePtr->offValuePtr = NULL;
    mePtr->entryFlags = 0;
    mePtr->index = index;
    mePtr->nextCascadePtr = NULL;
    if (Tk_InitOptions(menuPtr->interp, (char *) mePtr,
mePtr->optionTable, menuPtr->tkwin) != TCL_OK) {
ckfree(mePtr);
return NULL;
    }
    TkMenuInitializeEntryDrawingFields(mePtr);
    if (TkpMenuNewEntry(mePtr) != TCL_OK) {
Tk_FreeConfigOptions((char *) mePtr, mePtr->optionTable,
menuPtr->tkwin);
     ckfree(mePtr);
     return NULL;
    }

    return mePtr;
}

/*
*----------------------------------------------------------------------
*
* MenuAddOrInsert --
*
* This function does all of the work of the "add" and "insert" widget
* commands, allowing the code for these to be shared.
*
* Results:
* A standard Tcl return value.
*
* Side effects:
* A new menu entry is created in menuPtr.
*
*----------------------------------------------------------------------
*/

static int
MenuAddOrInsert(
    Tcl_Interp *interp, /* Used for error reporting. */
    TkMenu *menuPtr, /* Widget in which to create new entry. */
    Tcl_Obj *indexPtr, /* Object describing index at which to insert.
* NULL means insert at end. */
    int objc, /* Number of elements in objv. */
    Tcl_Obj *const objv[]) /* Arguments to command: first arg is type of
* entry, others are config options. */
{
    int type, index;
    TkMenuEntry *mePtr;
    TkMenu *menuListPtr;

    if (indexPtr != NULL) {
if (TkGetMenuIndex(interp, menuPtr, indexPtr, 1, &index) != TCL_OK) {
return TCL_ERROR;
}
    } else {
index = menuPtr->numEntries;
    }
    if (index < 0) {
const char *indexString = Tcl_GetString(indexPtr);

Tcl_AppendResult(interp, "bad index \"", indexString, "\"", NULL);
return TCL_ERROR;
    }
    if (menuPtr->tearoff && (index == 0)) {
index = 1;
    }

    /*
* Figure out the type of the new entry.
*/

    if (Tcl_GetIndexFromObj(interp, objv[0], menuEntryTypeStrings,
"menu entry type", 0, &type) != TCL_OK) {
return TCL_ERROR;
    }

    /*
* Now we have to add an entry for every instance related to this menu.
*/

    for (menuListPtr = menuPtr->masterMenuPtr; menuListPtr != NULL;
     menuListPtr = menuListPtr->nextInstancePtr) {

     mePtr = MenuNewEntry(menuListPtr, index, type);
     if (mePtr == NULL) {
     return TCL_ERROR;
     }
     if (ConfigureMenuEntry(mePtr, objc - 1, objv + 1) != TCL_OK) {
TkMenu *errorMenuPtr;
int i;

for (errorMenuPtr = menuPtr->masterMenuPtr;
errorMenuPtr != NULL;
errorMenuPtr = errorMenuPtr->nextInstancePtr) {
     Tcl_EventuallyFree(errorMenuPtr->entries[index],
     DestroyMenuEntry);
for (i = index; i < errorMenuPtr->numEntries - 1; i++) {
errorMenuPtr->entries[i] = errorMenuPtr->entries[i + 1];
errorMenuPtr->entries[i]->index = i;
}
errorMenuPtr->numEntries--;
if (errorMenuPtr->numEntries == 0) {
ckfree(errorMenuPtr->entries);
errorMenuPtr->entries = NULL;
}
if (errorMenuPtr == menuListPtr) {
break;
}
}
     return TCL_ERROR;
     }

     /*
* If a menu has cascades, then every instance of the menu has to have
* its own parallel cascade structure. So adding an entry to a menu
* with clones means that the menu that the entry points to has to be
* cloned for every clone the master menu has. This is special case #2
* in the comment at the top of this file.
*/

     if ((menuPtr != menuListPtr) && (type == CASCADE_ENTRY)) {
     if ((mePtr->namePtr != NULL)
&& (mePtr->childMenuRefPtr != NULL)
     && (mePtr->childMenuRefPtr->menuPtr != NULL)) {
TkMenu *cascadeMenuPtr =
mePtr->childMenuRefPtr->menuPtr->masterMenuPtr;
Tcl_Obj *newCascadePtr, *newObjv[2];
Tcl_Obj *menuNamePtr = Tcl_NewStringObj("-menu", -1);
Tcl_Obj *windowNamePtr =
Tcl_NewStringObj(Tk_PathName(menuListPtr->tkwin), -1);
Tcl_Obj *normalPtr = Tcl_NewStringObj("normal", -1);
TkMenuReferences *menuRefPtr;

Tcl_IncrRefCount(windowNamePtr);
newCascadePtr = TkNewMenuName(menuListPtr->interp,
windowNamePtr, cascadeMenuPtr);
Tcl_IncrRefCount(newCascadePtr);
Tcl_IncrRefCount(normalPtr);
CloneMenu(cascadeMenuPtr, newCascadePtr, normalPtr);

menuRefPtr = TkFindMenuReferencesObj(menuListPtr->interp,
newCascadePtr);
if (menuRefPtr == NULL) {
Tcl_Panic("CloneMenu failed inside of MenuAddOrInsert");
}
newObjv[0] = menuNamePtr;
newObjv[1] = newCascadePtr;
Tcl_IncrRefCount(menuNamePtr);
Tcl_IncrRefCount(newCascadePtr);
ConfigureMenuEntry(mePtr, 2, newObjv);
Tcl_DecrRefCount(newCascadePtr);
Tcl_DecrRefCount(menuNamePtr);
Tcl_DecrRefCount(windowNamePtr);
Tcl_DecrRefCount(normalPtr);
     }
     }
    }
    return TCL_OK;
}

/*
*--------------------------------------------------------------
*
* MenuVarProc --
*
* This function is invoked when someone changes the state variable
* associated with a radiobutton or checkbutton menu entry. The entry's
* selected state is set to match the value of the variable.
*
* Results:
* NULL is always returned.
*
* Side effects:
* The menu entry may become selected or deselected.
*
*--------------------------------------------------------------
*/

static char *
MenuVarProc(
    ClientData clientData, /* Information about menu entry. */
    Tcl_Interp *interp, /* Interpreter containing variable. */
    const char *name1, /* First part of variable's name. */
    const char *name2, /* Second part of variable's name. */
    int flags) /* Describes what just happened. */
{
    TkMenuEntry *mePtr = clientData;
    TkMenu *menuPtr;
    const char *value;
    const char *name, *onValue;

    if (flags & TCL_INTERP_DESTROYED) {
/*
* Do nothing if the interpreter is going away.
*/

     return NULL;
    }

    menuPtr = mePtr->menuPtr;
    name = Tcl_GetString(mePtr->namePtr);

    /*
* If the variable is being unset, then re-establish the trace.
*/

    if (flags & TCL_TRACE_UNSETS) {
mePtr->entryFlags &= ~ENTRY_SELECTED;
if (flags & TCL_TRACE_DESTROYED) {
Tcl_TraceVar(interp, name,
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
MenuVarProc, clientData);
}
TkpConfigureMenuEntry(mePtr);
TkEventuallyRedrawMenu(menuPtr, NULL);
return NULL;
    }

    /*
* Use the value of the variable to update the selected status of the menu
* entry.
*/

    value = Tcl_GetVar(interp, name, TCL_GLOBAL_ONLY);
    if (value == NULL) {
value = "";
    }
    if (mePtr->onValuePtr != NULL) {
onValue = Tcl_GetString(mePtr->onValuePtr);
if (strcmp(value, onValue) == 0) {
if (mePtr->entryFlags & ENTRY_SELECTED) {
return NULL;
}
mePtr->entryFlags |= ENTRY_SELECTED;
} else if (mePtr->entryFlags & ENTRY_SELECTED) {
mePtr->entryFlags &= ~ENTRY_SELECTED;
} else {
return NULL;
}
    } else {
return NULL;
    }
    TkpConfigureMenuEntry(mePtr);
    TkEventuallyRedrawMenu(menuPtr, mePtr);
    return NULL;
}

/*
*----------------------------------------------------------------------
*
* TkActivateMenuEntry --
*
* This function is invoked to make a particular menu entry the active
* one, deactivating any other entry that might currently be active.
*
* Results:
* The return value is a standard Tcl result (errors can occur while
* posting and unposting submenus).
*
* Side effects:
* Menu entries get redisplayed, and the active entry changes. Submenus
* may get posted and unposted.
*
*----------------------------------------------------------------------
*/

int
TkActivateMenuEntry(
    register TkMenu *menuPtr, /* Menu in which to activate. */
    int index) /* Index of entry to activate, or -1 to
* deactivate all entries. */
{
    register TkMenuEntry *mePtr;
    int result = TCL_OK;

    if (menuPtr->active >= 0) {
mePtr = menuPtr->entries[menuPtr->active];

/*
* Don't change the state unless it's currently active (state might
* already have been changed to disabled).
*/

if (mePtr->state == ENTRY_ACTIVE) {
mePtr->state = ENTRY_NORMAL;
}
TkEventuallyRedrawMenu(menuPtr, menuPtr->entries[menuPtr->active]);
    }
    menuPtr->active = index;
    if (index >= 0) {
mePtr = menuPtr->entries[index];
mePtr->state = ENTRY_ACTIVE;
TkEventuallyRedrawMenu(menuPtr, mePtr);
    }
    return result;
}

/*
*----------------------------------------------------------------------
*
* TkPostCommand --
*
* Execute the postcommand for the given menu.
*
* Results:
* The return value is a standard Tcl result (errors can occur while the
* postcommands are being processed).
*
* Side effects:
* Since commands can get executed while this routine is being executed,
* the entire world can change.
*
*----------------------------------------------------------------------
*/

int
TkPostCommand(
    TkMenu *menuPtr)
{
    int result;

    /*
* If there is a command for the menu, execute it. This may change the
* size of the menu, so be sure to recompute the menu's geometry if
* needed.
*/

    if (menuPtr->postCommandPtr != NULL) {
Tcl_Obj *postCommandPtr = menuPtr->postCommandPtr;

Tcl_IncrRefCount(postCommandPtr);
result = Tcl_EvalObjEx(menuPtr->interp, postCommandPtr,
TCL_EVAL_GLOBAL);
Tcl_DecrRefCount(postCommandPtr);
if (result != TCL_OK) {
return result;
}
TkRecomputeMenu(menuPtr);
    }
    return TCL_OK;
}

/*
*--------------------------------------------------------------
*
* CloneMenu --
*
* Creates a child copy of the menu. It will be inserted into the menu's
* instance chain. All attributes and entry attributes will be
* duplicated.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* Allocates storage. After the menu is created, any configuration done
* with this menu or any related one will be reflected in all of them.
*
*--------------------------------------------------------------
*/

static int
CloneMenu(
    TkMenu *menuPtr, /* The menu we are going to clone. */
    Tcl_Obj *newMenuNamePtr, /* The name to give the new menu. */
    Tcl_Obj *newMenuTypePtr) /* What kind of menu is this, a normal menu a
* menubar, or a tearoff? */
{
    int returnResult;
    int menuType, i;
    TkMenuReferences *menuRefPtr;
    Tcl_Obj *menuDupCommandArray[4];

    if (newMenuTypePtr == NULL) {
menuType = MASTER_MENU;
    } else {
if (Tcl_GetIndexFromObj(menuPtr->interp, newMenuTypePtr,
menuTypeStrings, "menu type", 0, &menuType) != TCL_OK) {
return TCL_ERROR;
}
    }

    menuDupCommandArray[0] = Tcl_NewStringObj("tk::MenuDup", -1);
    menuDupCommandArray[1] = Tcl_NewStringObj(Tk_PathName(menuPtr->tkwin), -1);
    menuDupCommandArray[2] = newMenuNamePtr;
    if (newMenuTypePtr == NULL) {
menuDupCommandArray[3] = Tcl_NewStringObj("normal", -1);
    } else {
menuDupCommandArray[3] = newMenuTypePtr;
    }
    for (i = 0; i < 4; i++) {
Tcl_IncrRefCount(menuDupCommandArray[i]);
    }
    Tcl_Preserve(menuPtr);
    returnResult = Tcl_EvalObjv(menuPtr->interp, 4, menuDupCommandArray, 0);
    for (i = 0; i < 4; i++) {
Tcl_DecrRefCount(menuDupCommandArray[i]);
    }

    /*
* Make sure the tcl command actually created the clone.
*/

    if ((returnResult == TCL_OK) &&
((menuRefPtr = TkFindMenuReferencesObj(menuPtr->interp,
newMenuNamePtr)) != NULL)
&& (menuPtr->numEntries == menuRefPtr->menuPtr->numEntries)) {
TkMenu *newMenuPtr = menuRefPtr->menuPtr;
Tcl_Obj *newObjv[3];
int i, numElements;

/*
* Now put this newly created menu into the parent menu's instance
* chain.
*/

if (menuPtr->nextInstancePtr == NULL) {
menuPtr->nextInstancePtr = newMenuPtr;
newMenuPtr->masterMenuPtr = menuPtr->masterMenuPtr;
} else {
TkMenu *masterMenuPtr;

masterMenuPtr = menuPtr->masterMenuPtr;
newMenuPtr->nextInstancePtr = masterMenuPtr->nextInstancePtr;
masterMenuPtr->nextInstancePtr = newMenuPtr;
newMenuPtr->masterMenuPtr = masterMenuPtr;
}

/*
* Add the master menu's window to the bind tags for this window after
* this window's tag. This is so the user can bind to either this
* clone (which may not be easy to do) or the entire menu clone
* structure.
*/

newObjv[0] = Tcl_NewStringObj("bindtags", -1);
newObjv[1] = Tcl_NewStringObj(Tk_PathName(newMenuPtr->tkwin), -1);
Tcl_IncrRefCount(newObjv[0]);
Tcl_IncrRefCount(newObjv[1]);
if (Tk_BindtagsObjCmd(newMenuPtr->tkwin, newMenuPtr->interp, 2,
newObjv) == TCL_OK) {
const char *windowName;
Tcl_Obj *bindingsPtr =
Tcl_DuplicateObj(Tcl_GetObjResult(newMenuPtr->interp));
Tcl_Obj *elementPtr;

Tcl_IncrRefCount(bindingsPtr);
Tcl_ListObjLength(newMenuPtr->interp, bindingsPtr, &numElements);
for (i = 0; i < numElements; i++) {
Tcl_ListObjIndex(newMenuPtr->interp, bindingsPtr, i,
&elementPtr);
windowName = Tcl_GetString(elementPtr);
if (strcmp(windowName, Tk_PathName(newMenuPtr->tkwin))
== 0) {
Tcl_Obj *newElementPtr = Tcl_NewStringObj(
Tk_PathName(newMenuPtr->masterMenuPtr->tkwin), -1);

/*
* The newElementPtr will have its refCount incremented
* here, so we don't need to worry about it any more.
*/

Tcl_ListObjReplace(menuPtr->interp, bindingsPtr,
i + 1, 0, 1, &newElementPtr);
newObjv[2] = bindingsPtr;
Tk_BindtagsObjCmd(newMenuPtr->tkwin, menuPtr->interp, 3,
newObjv);
break;
}
}
Tcl_DecrRefCount(bindingsPtr);
}
Tcl_DecrRefCount(newObjv[0]);
Tcl_DecrRefCount(newObjv[1]);
Tcl_ResetResult(menuPtr->interp);

/*
* Clone all of the cascade menus that this menu points to.
*/

for (i = 0; i < menuPtr->numEntries; i++) {
TkMenuReferences *cascadeRefPtr;
TkMenu *oldCascadePtr;

if ((menuPtr->entries[i]->type == CASCADE_ENTRY)
&& (menuPtr->entries[i]->namePtr != NULL)) {
cascadeRefPtr =
TkFindMenuReferencesObj(menuPtr->interp,
menuPtr->entries[i]->namePtr);
if ((cascadeRefPtr != NULL) && (cascadeRefPtr->menuPtr)) {
Tcl_Obj *windowNamePtr =
Tcl_NewStringObj(Tk_PathName(newMenuPtr->tkwin),
-1);
Tcl_Obj *newCascadePtr;

oldCascadePtr = cascadeRefPtr->menuPtr;

Tcl_IncrRefCount(windowNamePtr);
newCascadePtr = TkNewMenuName(menuPtr->interp,
windowNamePtr, oldCascadePtr);
Tcl_IncrRefCount(newCascadePtr);
CloneMenu(oldCascadePtr, newCascadePtr, NULL);

newObjv[0] = Tcl_NewStringObj("-menu", -1);
newObjv[1] = newCascadePtr;
Tcl_IncrRefCount(newObjv[0]);
ConfigureMenuEntry(newMenuPtr->entries[i], 2, newObjv);
Tcl_DecrRefCount(newObjv[0]);
Tcl_DecrRefCount(newCascadePtr);
Tcl_DecrRefCount(windowNamePtr);
}
}
}

returnResult = TCL_OK;
    } else {
returnResult = TCL_ERROR;
    }
    Tcl_Release(menuPtr);
    return returnResult;
}

/*
*----------------------------------------------------------------------
*
* MenuDoXPosition --
*
* Given arguments from an option command line, returns the X position.
*
* Results:
* Returns TCL_OK or TCL_Error
*
* Side effects:
* xPosition is set to the X-position of the menu entry.
*
*----------------------------------------------------------------------
*/

static int
MenuDoXPosition(
    Tcl_Interp *interp,
    TkMenu *menuPtr,
    Tcl_Obj *objPtr)
{
    int index;

    TkRecomputeMenu(menuPtr);
    if (TkGetMenuIndex(interp, menuPtr, objPtr, 0, &index) != TCL_OK) {
return TCL_ERROR;
    }
    Tcl_ResetResult(interp);
    if (index < 0) {
Tcl_SetObjResult(interp, Tcl_NewIntObj(0));
    } else {
Tcl_SetObjResult(interp, Tcl_NewIntObj(menuPtr->entries[index]->x));
    }
    return TCL_OK;
}

/*
*----------------------------------------------------------------------
*
* MenuDoYPosition --
*
* Given arguments from an option command line, returns the Y position.
*
* Results:
* Returns TCL_OK or TCL_Error
*
* Side effects:
* yPosition is set to the Y-position of the menu entry.
*
*----------------------------------------------------------------------
*/

static int
MenuDoYPosition(
    Tcl_Interp *interp,
    TkMenu *menuPtr,
    Tcl_Obj *objPtr)
{
    int index;

    TkRecomputeMenu(menuPtr);
    if (TkGetMenuIndex(interp, menuPtr, objPtr, 0, &index) != TCL_OK) {
goto error;
    }
    Tcl_ResetResult(interp);
    if (index < 0) {
Tcl_SetObjResult(interp, Tcl_NewIntObj(0));
    } else {
Tcl_SetObjResult(interp, Tcl_NewIntObj(menuPtr->entries[index]->y));
    }

    return TCL_OK;

  error:
    return TCL_ERROR;
}

/*
*----------------------------------------------------------------------
*
* GetIndexFromCoords --
*
* Given a string of the form "@integer", return the menu item
* corresponding to the provided y-coordinate in the menu window.
*
* Results:
* If int is a valid number, *indexPtr will be the number of the
* menuentry that is the correct height. If int is invalid, *indexPtr
* will be unchanged. Returns appropriate Tcl error number.
*
* Side effects:
* If int is invalid, interp's result will be set to NULL.
*
*----------------------------------------------------------------------
*/

static int
GetIndexFromCoords(
    Tcl_Interp *interp, /* Interpreter of menu. */
    TkMenu *menuPtr, /* The menu we are searching. */
    const char *string, /* The @string we are parsing. */
    int *indexPtr) /* The index of the item that matches. */
{
    int x, y, i;
    const char *p;
    char *end;
    int x2, borderwidth, max;

    TkRecomputeMenu(menuPtr);
    p = string + 1;
    y = strtol(p, &end, 0);
    if (end == p) {
goto error;
    }
    Tk_GetPixelsFromObj(interp, menuPtr->tkwin,
menuPtr->borderWidthPtr, &borderwidth);
    if (*end == ',') {
x = y;
p = end + 1;
y = strtol(p, &end, 0);
if (end == p) {
goto error;
}
    } else {
x = borderwidth;
    }

    *indexPtr = -1;

    /* set the width of the final column to the remainder of the window
* being aware of windows that may not be mapped yet.
*/
    max = Tk_IsMapped(menuPtr->tkwin)
      ? Tk_Width(menuPtr->tkwin) : Tk_ReqWidth(menuPtr->tkwin);
    max -= borderwidth;

    for (i = 0; i < menuPtr->numEntries; i++) {
if (menuPtr->entries[i]->entryFlags & ENTRY_LAST_COLUMN) {
x2 = max;
} else {
x2 = menuPtr->entries[i]->x + menuPtr->entries[i]->width;
}
if ((x >= menuPtr->entries[i]->x) && (y >= menuPtr->entries[i]->y)
&& (x < x2)
&& (y < (menuPtr->entries[i]->y
+ menuPtr->entries[i]->height))) {
*indexPtr = i;
break;
}
    }
    return TCL_OK;

  error:
    Tcl_ResetResult(interp);
    return TCL_ERROR;
}

/*
*----------------------------------------------------------------------
*
* RecursivelyDeleteMenu --
*
* Deletes a menu and any cascades underneath it. Used for deleting
* instances when a menu is no longer being used as a menubar, for
* instance.
*
* Results:
* None.
*
* Side effects:
* Destroys the menu and all cascade menus underneath it.
*
*----------------------------------------------------------------------
*/

static void
RecursivelyDeleteMenu(
    TkMenu *menuPtr) /* The menubar instance we are deleting. */
{
    int i;
    TkMenuEntry *mePtr;

    /*
* It is not 100% clear that this preserve/release pair is required, but
* we have added them for safety in this very complex code.
*/

    Tcl_Preserve(menuPtr);

    for (i = 0; i < menuPtr->numEntries; i++) {
     mePtr = menuPtr->entries[i];
     if ((mePtr->type == CASCADE_ENTRY)
     && (mePtr->childMenuRefPtr != NULL)
     && (mePtr->childMenuRefPtr->menuPtr != NULL)) {
     RecursivelyDeleteMenu(mePtr->childMenuRefPtr->menuPtr);
     }
    }
    if (menuPtr->tkwin != NULL) {
Tk_DestroyWindow(menuPtr->tkwin);
    }

    Tcl_Release(menuPtr);
}

/*
*----------------------------------------------------------------------
*
* TkNewMenuName --
*
* Makes a new unique name for a cloned menu. Will be a child of oldName.
*
* Results:
* Returns a char * which has been allocated; caller must free.
*
* Side effects:
* Memory is allocated.
*
*----------------------------------------------------------------------
*/

Tcl_Obj *
TkNewMenuName(
    Tcl_Interp *interp, /* The interp the new name has to live in.*/
    Tcl_Obj *parentPtr, /* The prefix path of the new name. */
    TkMenu *menuPtr) /* The menu we are cloning. */
{
    Tcl_Obj *resultPtr = NULL; /* Initialization needed only to prevent
* compiler warning. */
    Tcl_Obj *childPtr;
    char *destString;
    int i;
    int doDot;
    Tcl_CmdInfo cmdInfo;
    Tcl_HashTable *nameTablePtr = NULL;
    TkWindow *winPtr = (TkWindow *) menuPtr->tkwin;
    const char *parentName = Tcl_GetString(parentPtr);

    if (winPtr->mainPtr != NULL) {
nameTablePtr = &(winPtr->mainPtr->nameTable);
    }

    doDot = parentName[strlen(parentName) - 1] != '.';

    childPtr = Tcl_NewStringObj(Tk_PathName(menuPtr->tkwin), -1);
    for (destString = Tcl_GetString(childPtr);
     *destString != '\0'; destString++) {
     if (*destString == '.') {
     *destString = '#';
     }
    }

    for (i = 0; ; i++) {
     if (i == 0) {
resultPtr = Tcl_DuplicateObj(parentPtr);
     if (doDot) {
Tcl_AppendToObj(resultPtr, ".", -1);
     }
Tcl_AppendObjToObj(resultPtr, childPtr);
     } else {
Tcl_Obj *intPtr;

Tcl_DecrRefCount(resultPtr);
resultPtr = Tcl_DuplicateObj(parentPtr);
if (doDot) {
Tcl_AppendToObj(resultPtr, ".", -1);
}
Tcl_AppendObjToObj(resultPtr, childPtr);
intPtr = Tcl_NewIntObj(i);
Tcl_AppendObjToObj(resultPtr, intPtr);
Tcl_DecrRefCount(intPtr);
     }
destString = Tcl_GetString(resultPtr);
     if ((Tcl_GetCommandInfo(interp, destString, &cmdInfo) == 0)
&& ((nameTablePtr == NULL)
|| (Tcl_FindHashEntry(nameTablePtr, destString) == NULL))) {
     break;
     }
    }
    Tcl_DecrRefCount(childPtr);
    return resultPtr;
}

/*
*----------------------------------------------------------------------
*
* TkSetWindowMenuBar --
*
* Associates a menu with a window. Called by ConfigureFrame in in
* response to a "-menu .foo" configuration option for a top level.
*
* Results:
* None.
*
* Side effects:
* The old menu clones for the menubar are thrown away, and a handler is
* set up to allocate the new ones.
*
*----------------------------------------------------------------------
*/

void
TkSetWindowMenuBar(
    Tcl_Interp *interp, /* The interpreter the toplevel lives in. */
    Tk_Window tkwin, /* The toplevel window. */
    const char *oldMenuName, /* The name of the menubar previously set in
* this toplevel. NULL means no menu was set
* previously. */
    const char *menuName) /* The name of the new menubar that the
* toplevel needs to be set to. NULL means
* that their is no menu now. */
{
    TkMenuTopLevelList *topLevelListPtr, *prevTopLevelPtr;
    TkMenu *menuPtr;
    TkMenuReferences *menuRefPtr;

    /*
* Destroy the menubar instances of the old menu. Take this window out of
* the old menu's top level reference list.
*/

    if (oldMenuName != NULL) {
menuRefPtr = TkFindMenuReferences(interp, oldMenuName);
if (menuRefPtr != NULL) {
/*
* Find the menubar instance that is to be removed. Destroy it and
* all of the cascades underneath it.
*/

if (menuRefPtr->menuPtr != NULL) {
TkMenu *instancePtr;

menuPtr = menuRefPtr->menuPtr;

for (instancePtr = menuPtr->masterMenuPtr;
instancePtr != NULL;
instancePtr = instancePtr->nextInstancePtr) {
if (instancePtr->menuType == MENUBAR
&& instancePtr->parentTopLevelPtr == tkwin) {
RecursivelyDeleteMenu(instancePtr);
break;
}
}
}

/*
* Now we need to remove this toplevel from the list of toplevels
* that reference this menu.
*/

topLevelListPtr = menuRefPtr->topLevelListPtr;
prevTopLevelPtr = NULL;

while ((topLevelListPtr != NULL)
&& (topLevelListPtr->tkwin != tkwin)) {
prevTopLevelPtr = topLevelListPtr;
topLevelListPtr = topLevelListPtr->nextPtr;
}

/*
* Now we have found the toplevel reference that matches the
* tkwin; remove this reference from the list.
*/

if (topLevelListPtr != NULL) {
if (prevTopLevelPtr == NULL) {
menuRefPtr->topLevelListPtr =
menuRefPtr->topLevelListPtr->nextPtr;
} else {
prevTopLevelPtr->nextPtr = topLevelListPtr->nextPtr;
}
ckfree(topLevelListPtr);
TkFreeMenuReferences(menuRefPtr);
}
}
    }

    /*
* Now, add the clone references for the new menu.
*/

    if (menuName != NULL && menuName[0] != 0) {
TkMenu *menuBarPtr = NULL;

menuRefPtr = TkCreateMenuReferences(interp, menuName);

menuPtr = menuRefPtr->menuPtr;
if (menuPtr != NULL) {
Tcl_Obj *cloneMenuPtr;
TkMenuReferences *cloneMenuRefPtr;
Tcl_Obj *newObjv[4];
Tcl_Obj *windowNamePtr = Tcl_NewStringObj(Tk_PathName(tkwin),
-1);
Tcl_Obj *menubarPtr = Tcl_NewStringObj("menubar", -1);

/*
* Clone the menu and all of the cascades underneath it.
*/

Tcl_IncrRefCount(windowNamePtr);
cloneMenuPtr = TkNewMenuName(interp, windowNamePtr,
menuPtr);
Tcl_IncrRefCount(cloneMenuPtr);
Tcl_IncrRefCount(menubarPtr);
CloneMenu(menuPtr, cloneMenuPtr, menubarPtr);

cloneMenuRefPtr = TkFindMenuReferencesObj(interp, cloneMenuPtr);
if ((cloneMenuRefPtr != NULL)
&& (cloneMenuRefPtr->menuPtr != NULL)) {
Tcl_Obj *cursorPtr = Tcl_NewStringObj("-cursor", -1);
Tcl_Obj *nullPtr = Tcl_NewObj();
cloneMenuRefPtr->menuPtr->parentTopLevelPtr = tkwin;
menuBarPtr = cloneMenuRefPtr->menuPtr;
newObjv[0] = cursorPtr;
newObjv[1] = nullPtr;
Tcl_IncrRefCount(cursorPtr);
Tcl_IncrRefCount(nullPtr);
ConfigureMenu(menuPtr->interp, cloneMenuRefPtr->menuPtr,
2, newObjv);
Tcl_DecrRefCount(cursorPtr);
Tcl_DecrRefCount(nullPtr);
}

TkpSetWindowMenuBar(tkwin, menuBarPtr);
Tcl_DecrRefCount(cloneMenuPtr);
Tcl_DecrRefCount(menubarPtr);
Tcl_DecrRefCount(windowNamePtr);
} else {
TkpSetWindowMenuBar(tkwin, NULL);
}

/*
* Add this window to the menu's list of windows that refer to this
* menu.
*/

topLevelListPtr = ckalloc(sizeof(TkMenuTopLevelList));
topLevelListPtr->tkwin = tkwin;
topLevelListPtr->nextPtr = menuRefPtr->topLevelListPtr;
menuRefPtr->topLevelListPtr = topLevelListPtr;
    } else {
TkpSetWindowMenuBar(tkwin, NULL);
    }
    TkpSetMainMenubar(interp, tkwin, menuName);
}

/*
*----------------------------------------------------------------------
*
* DestroyMenuHashTable --
*
* Called when an interp is deleted and a menu hash table has been set in
* it.
*
* Results:
* None.
*
* Side effects:
* The hash table is destroyed.
*
*----------------------------------------------------------------------
*/

static void
DestroyMenuHashTable(
    ClientData clientData, /* The menu hash table we are destroying. */
    Tcl_Interp *interp) /* The interpreter we are destroying. */
{
    Tcl_DeleteHashTable(clientData);
    ckfree(clientData);
}

/*
*----------------------------------------------------------------------
*
* TkGetMenuHashTable --
*
* For a given interp, give back the menu hash table that goes with it.
* If the hash table does not exist, it is created.
*
* Results:
* Returns a hash table pointer.
*
* Side effects:
* A new hash table is created if there were no table in the interp
* originally.
*
*----------------------------------------------------------------------
*/

Tcl_HashTable *
TkGetMenuHashTable(
    Tcl_Interp *interp) /* The interp we need the hash table in.*/
{
    Tcl_HashTable *menuTablePtr =
Tcl_GetAssocData(interp, MENU_HASH_KEY, NULL);

    if (menuTablePtr == NULL) {
menuTablePtr = ckalloc(sizeof(Tcl_HashTable));
Tcl_InitHashTable(menuTablePtr, TCL_STRING_KEYS);
Tcl_SetAssocData(interp, MENU_HASH_KEY, DestroyMenuHashTable,
menuTablePtr);
    }
    return menuTablePtr;
}

/*
*----------------------------------------------------------------------
*
* TkCreateMenuReferences --
*
* Given a pathname, gives back a pointer to a TkMenuReferences
* structure. If a reference is not already in the hash table, one is
* created.
*
* Results:
* Returns a pointer to a menu reference structure. Should not be freed
* by calller; when a field of the reference is cleared,
* TkFreeMenuReferences should be called.
*
* Side effects:
* A new hash table entry is created if there were no references to the
* menu originally.
*
*----------------------------------------------------------------------
*/

TkMenuReferences *
TkCreateMenuReferences(
    Tcl_Interp *interp,
    const char *pathName) /* The path of the menu widget. */
{
    Tcl_HashEntry *hashEntryPtr;
    TkMenuReferences *menuRefPtr;
    int newEntry;
    Tcl_HashTable *menuTablePtr = TkGetMenuHashTable(interp);

    hashEntryPtr = Tcl_CreateHashEntry(menuTablePtr, pathName, &newEntry);
    if (newEntry) {
     menuRefPtr = ckalloc(sizeof(TkMenuReferences));
     menuRefPtr->menuPtr = NULL;
     menuRefPtr->topLevelListPtr = NULL;
     menuRefPtr->parentEntryPtr = NULL;
     menuRefPtr->hashEntryPtr = hashEntryPtr;
     Tcl_SetHashValue(hashEntryPtr, menuRefPtr);
    } else {
     menuRefPtr = Tcl_GetHashValue(hashEntryPtr);
    }
    return menuRefPtr;
}

/*
*----------------------------------------------------------------------
*
* TkFindMenuReferences --
*
* Given a pathname, gives back a pointer to the TkMenuReferences
* structure.
*
* Results:
* Returns a pointer to a menu reference structure. Should not be freed
* by calller; when a field of the reference is cleared,
* TkFreeMenuReferences should be called. Returns NULL if no reference
* with this pathname exists.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/

TkMenuReferences *
TkFindMenuReferences(
    Tcl_Interp *interp, /* The interp the menu is living in. */
    const char *pathName) /* The path of the menu widget. */
{
    Tcl_HashEntry *hashEntryPtr;
    TkMenuReferences *menuRefPtr = NULL;
    Tcl_HashTable *menuTablePtr;

    menuTablePtr = TkGetMenuHashTable(interp);
    hashEntryPtr = Tcl_FindHashEntry(menuTablePtr, pathName);
    if (hashEntryPtr != NULL) {
     menuRefPtr = Tcl_GetHashValue(hashEntryPtr);
    }
    return menuRefPtr;
}

/*
*----------------------------------------------------------------------
*
* TkFindMenuReferencesObj --
*
* Given a pathname, gives back a pointer to the TkMenuReferences
* structure.
*
* Results:
* Returns a pointer to a menu reference structure. Should not be freed
* by calller; when a field of the reference is cleared,
* TkFreeMenuReferences should be called. Returns NULL if no reference
* with this pathname exists.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/

TkMenuReferences *
TkFindMenuReferencesObj(
    Tcl_Interp *interp, /* The interp the menu is living in. */
    Tcl_Obj *objPtr) /* The path of the menu widget. */
{
    const char *pathName = Tcl_GetString(objPtr);
    return TkFindMenuReferences(interp, pathName);
}

/*
*----------------------------------------------------------------------
*
* TkFreeMenuReferences --
*
* This is called after one of the fields in a menu reference is cleared.
* It cleans up the ref if it is now empty.
*
* Results:
* Returns 1 if the references structure was freed, and 0 otherwise.
*
* Side effects:
* If this is the last field to be cleared, the menu ref is taken out of
* the hash table.
*
*----------------------------------------------------------------------
*/

int
TkFreeMenuReferences(
    TkMenuReferences *menuRefPtr)
/* The menu reference to free. */
{
    if ((menuRefPtr->menuPtr == NULL)
     && (menuRefPtr->parentEntryPtr == NULL)
     && (menuRefPtr->topLevelListPtr == NULL)) {
     Tcl_DeleteHashEntry(menuRefPtr->hashEntryPtr);
     ckfree(menuRefPtr);
return 1;
    }
    return 0;
}

/*
*----------------------------------------------------------------------
*
* DeleteMenuCloneEntries --
*
* For every clone in this clone chain, delete the menu entries given by
* the parameters.
*
* Results:
* None.
*
* Side effects:
* The appropriate entries are deleted from all clones of this menu.
*
*----------------------------------------------------------------------
*/

static void
DeleteMenuCloneEntries(
    TkMenu *menuPtr, /* The menu the command was issued with. */
    int first, /* The zero-based first entry in the set of
* entries to delete. */
    int last) /* The zero-based last entry. */
{
    TkMenu *menuListPtr;
    int numDeleted, i, j;

    numDeleted = last + 1 - first;
    for (menuListPtr = menuPtr->masterMenuPtr; menuListPtr != NULL;
menuListPtr = menuListPtr->nextInstancePtr) {
for (i = last; i >= first; i--) {
Tcl_EventuallyFree(menuListPtr->entries[i], DestroyMenuEntry);
}
for (i = last + 1; i < menuListPtr->numEntries; i++) {
j = i - numDeleted;
menuListPtr->entries[j] = menuListPtr->entries[i];
menuListPtr->entries[j]->index = j;
}
menuListPtr->numEntries -= numDeleted;
if (menuListPtr->numEntries == 0) {
ckfree(menuListPtr->entries);
menuListPtr->entries = NULL;
}
if ((menuListPtr->active >= first)
&& (menuListPtr->active <= last)) {
menuListPtr->active = -1;
} else if (menuListPtr->active > last) {
menuListPtr->active -= numDeleted;
}
TkEventuallyRecomputeMenu(menuListPtr);
    }
}

/*
*----------------------------------------------------------------------
*
* TkMenuCleanup --
*
* Resets menusInitialized to allow Tk to be finalized and reused without
* the DLL being unloaded.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/

static void
TkMenuCleanup(
    ClientData unused)
{
    menusInitialized = 0;
}

/*
*----------------------------------------------------------------------
*
* TkMenuInit --
*
* Sets up the hash tables and the variables used by the menu package.
*
* Results:
* None.
*
* Side effects:
* lastMenuID gets initialized, and the parent hash and the command hash
* are allocated.
*
*----------------------------------------------------------------------
*/

void
TkMenuInit(void)
{
    ThreadSpecificData *tsdPtr =
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    if (!menusInitialized) {
Tcl_MutexLock(&menuMutex);
if (!menusInitialized) {
TkpMenuInit();
menusInitialized = 1;
}

/*
* Make sure we cleanup on finalize.
*/

TkCreateExitHandler((Tcl_ExitProc *) TkMenuCleanup, NULL);
Tcl_MutexUnlock(&menuMutex);
    }
    if (!tsdPtr->menusInitialized) {
TkpMenuThreadInit();
tsdPtr->menusInitialized = 1;
    }
}

/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* End:
*/
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