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dashley |
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/* $Header$ */ |
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/* |
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* tkMacWinMenu.c -- |
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* |
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* This module implements the common elements of the Mac and Windows |
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* specific features of menus. This file is not used for UNIX. |
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* |
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* Copyright (c) 1996-1997 by Sun Microsystems, Inc. |
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* |
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* See the file "license.terms" for information on usage and redistribution |
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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* |
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* RCS: @(#) $Id: tkmacwinmenu.c,v 1.1.1.1 2001/06/13 05:05:02 dtashley Exp $ |
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*/ |
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#include "tkMenu.h" |
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typedef struct ThreadSpecificData { |
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int postCommandGeneration; |
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} ThreadSpecificData; |
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static Tcl_ThreadDataKey dataKey; |
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static int PreprocessMenu _ANSI_ARGS_((TkMenu *menuPtr)); |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* PreprocessMenu -- |
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* |
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* The guts of the preprocessing. Recursive. |
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* |
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* Results: |
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* The return value is a standard Tcl result (errors can occur |
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* while the postcommands are being processed). |
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* |
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* Side effects: |
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* Since commands can get executed while this routine is being executed, |
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* the entire world can change. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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static int |
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PreprocessMenu(menuPtr) |
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TkMenu *menuPtr; |
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{ |
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int index, result, finished; |
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TkMenu *cascadeMenuPtr; |
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ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
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Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
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Tcl_Preserve((ClientData) menuPtr); |
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/* |
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* First, let's process the post command on ourselves. If this command |
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* destroys this menu, or if there was an error, we are done. |
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*/ |
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result = TkPostCommand(menuPtr); |
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if ((result != TCL_OK) || (menuPtr->tkwin == NULL)) { |
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goto done; |
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} |
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/* |
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* Now, we go through structure and process all of the commands. |
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* Since the structure is changing, we stop after we do one command, |
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* and start over. When we get through without doing any, we are done. |
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*/ |
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do { |
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finished = 1; |
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for (index = 0; index < menuPtr->numEntries; index++) { |
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if ((menuPtr->entries[index]->type == CASCADE_ENTRY) |
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&& (menuPtr->entries[index]->namePtr != NULL)) { |
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if ((menuPtr->entries[index]->childMenuRefPtr != NULL) |
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&& (menuPtr->entries[index]->childMenuRefPtr->menuPtr |
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!= NULL)) { |
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cascadeMenuPtr = |
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menuPtr->entries[index]->childMenuRefPtr->menuPtr; |
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if (cascadeMenuPtr->postCommandGeneration != |
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tsdPtr->postCommandGeneration) { |
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cascadeMenuPtr->postCommandGeneration = |
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tsdPtr->postCommandGeneration; |
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result = PreprocessMenu(cascadeMenuPtr); |
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if (result != TCL_OK) { |
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goto done; |
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} |
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finished = 0; |
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break; |
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} |
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} |
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} |
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} |
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} while (!finished); |
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done: |
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Tcl_Release((ClientData)menuPtr); |
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return result; |
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} |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* TkPreprocessMenu -- |
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* |
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* On the Mac and on Windows, all of the postcommand processing has |
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* to be done on the entire tree underneath the main window to be |
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* posted. This means that we have to traverse the menu tree and |
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* issue the postcommands for all of the menus that have cascades |
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* attached. Since the postcommands can change the menu structure while |
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* we are traversing, we have to be extremely careful. Basically, the |
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* idea is to traverse the structure until we succesfully process |
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* one postcommand. Then we start over, and do it again until |
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* we traverse the whole structure without processing any postcommands. |
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* |
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* We are also going to set up the cascade back pointers in here |
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* since we have to traverse the entire structure underneath the menu |
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* anyway, We can clear the postcommand marks while we do that. |
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* |
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* Results: |
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* The return value is a standard Tcl result (errors can occur |
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* while the postcommands are being processed). |
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* |
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* Side effects: |
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* Since commands can get executed while this routine is being executed, |
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* the entire world can change. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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int |
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TkPreprocessMenu(menuPtr) |
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TkMenu *menuPtr; |
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{ |
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ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
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Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
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tsdPtr->postCommandGeneration++; |
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menuPtr->postCommandGeneration = tsdPtr->postCommandGeneration; |
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return PreprocessMenu(menuPtr); |
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} |
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/* End of tkmacwinmenu.c */ |