tkMacWinMenu.c
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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);
- }