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/*
* tkMacWinMenu.c --
*
* This module implements the common elements of the Mac and Windows
* specific features of menus. This file is not used for UNIX.
*
* Copyright (c) 1996-1997 by Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* RCS: @(#) $Id: tkMacWinMenu.c,v 1.3 1999/04/16 01:51:19 stanton Exp $
*/
#include "tkMenu.h"
typedef struct ThreadSpecificData {
int postCommandGeneration;
} ThreadSpecificData;
static Tcl_ThreadDataKey dataKey;
static int PreprocessMenu _ANSI_ARGS_((TkMenu *menuPtr));
/*
*----------------------------------------------------------------------
*
* PreprocessMenu --
*
* The guts of the preprocessing. Recursive.
*
* 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.
*
*----------------------------------------------------------------------
*/
static int
PreprocessMenu(menuPtr)
TkMenu *menuPtr;
{
int index, result, finished;
TkMenu *cascadeMenuPtr;
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
Tcl_Preserve((ClientData) menuPtr);
/*
* First, let's process the post command on ourselves. If this command
* destroys this menu, or if there was an error, we are done.
*/
result = TkPostCommand(menuPtr);
if ((result != TCL_OK) || (menuPtr->tkwin == NULL)) {
goto done;
}
/*
* Now, we go through structure and process all of the commands.
* Since the structure is changing, we stop after we do one command,
* and start over. When we get through without doing any, we are done.
*/
do {
finished = 1;
for (index = 0; index < menuPtr->numEntries; index++) {
if ((menuPtr->entries[index]->type == CASCADE_ENTRY)
&& (menuPtr->entries[index]->namePtr != NULL)) {
if ((menuPtr->entries[index]->childMenuRefPtr != NULL)
&& (menuPtr->entries[index]->childMenuRefPtr->menuPtr
!= NULL)) {
cascadeMenuPtr =
menuPtr->entries[index]->childMenuRefPtr->menuPtr;
if (cascadeMenuPtr->postCommandGeneration !=
tsdPtr->postCommandGeneration) {
cascadeMenuPtr->postCommandGeneration =
tsdPtr->postCommandGeneration;
result = PreprocessMenu(cascadeMenuPtr);
if (result != TCL_OK) {
goto done;
}
finished = 0;
break;
}
}
}
}
} while (!finished);
done:
Tcl_Release((ClientData)menuPtr);
return result;
}
/*
*----------------------------------------------------------------------
*
* TkPreprocessMenu --
*
* On the Mac and on Windows, all of the postcommand processing has
* to be done on the entire tree underneath the main window to be
* posted. This means that we have to traverse the menu tree and
* issue the postcommands for all of the menus that have cascades
* attached. Since the postcommands can change the menu structure while
* we are traversing, we have to be extremely careful. Basically, the
* idea is to traverse the structure until we succesfully process
* one postcommand. Then we start over, and do it again until
* we traverse the whole structure without processing any postcommands.
*
* We are also going to set up the cascade back pointers in here
* since we have to traverse the entire structure underneath the menu
* anyway, We can clear the postcommand marks while we do that.
*
* 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
TkPreprocessMenu(menuPtr)
TkMenu *menuPtr;
{
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
tsdPtr->postCommandGeneration++;
menuPtr->postCommandGeneration = tsdPtr->postCommandGeneration;
return PreprocessMenu(menuPtr);
}
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