shared_source/c_tk_base_7_5_w_mods/tkmacwinmenu.c

/* $Header$ */

/* 
 * 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 1.1.1.1 2001/06/13 05:05:02 dtashley 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);
}

/* End of tkmacwinmenu.c */
1	/* $Header$ */
2
3	/*
4	* tkMacWinMenu.c --
5	*
6	* This module implements the common elements of the Mac and Windows
7	* specific features of menus. This file is not used for UNIX.
8	*
9	* Copyright (c) 1996-1997 by Sun Microsystems, Inc.
10	*
11	* See the file "license.terms" for information on usage and redistribution
12	* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
13	*
14	* RCS: @(#) $Id: tkmacwinmenu.c,v 1.1.1.1 2001/06/13 05:05:02 dtashley Exp $
15	*/
16
17	#include "tkMenu.h"
18
19	typedef struct ThreadSpecificData {
20	int postCommandGeneration;
21	} ThreadSpecificData;
22	static Tcl_ThreadDataKey dataKey;
23
24
25	static int PreprocessMenu _ANSI_ARGS_((TkMenu *menuPtr));
26
27
28	/*
29	*----------------------------------------------------------------------
30	*
31	* PreprocessMenu --
32	*
33	* The guts of the preprocessing. Recursive.
34	*
35	* Results:
36	* The return value is a standard Tcl result (errors can occur
37	* while the postcommands are being processed).
38	*
39	* Side effects:
40	* Since commands can get executed while this routine is being executed,
41	* the entire world can change.
42	*
43	*----------------------------------------------------------------------
44	*/
45
46	static int
47	PreprocessMenu(menuPtr)
48	TkMenu *menuPtr;
49	{
50	int index, result, finished;
51	TkMenu *cascadeMenuPtr;
52	ThreadSpecificData tsdPtr = (ThreadSpecificData )
53	Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
54
55	Tcl_Preserve((ClientData) menuPtr);
56
57	/*
58	* First, let's process the post command on ourselves. If this command
59	* destroys this menu, or if there was an error, we are done.
60	*/
61
62	result = TkPostCommand(menuPtr);
63	if ((result != TCL_OK) \|\| (menuPtr->tkwin == NULL)) {
64	goto done;
65	}
66
67	/*
68	* Now, we go through structure and process all of the commands.
69	* Since the structure is changing, we stop after we do one command,
70	* and start over. When we get through without doing any, we are done.
71	*/
72
73
74	do {
75	finished = 1;
76	for (index = 0; index < menuPtr->numEntries; index++) {
77	if ((menuPtr->entries[index]->type == CASCADE_ENTRY)
78	&& (menuPtr->entries[index]->namePtr != NULL)) {
79	if ((menuPtr->entries[index]->childMenuRefPtr != NULL)
80	&& (menuPtr->entries[index]->childMenuRefPtr->menuPtr
81	!= NULL)) {
82	cascadeMenuPtr =
83	menuPtr->entries[index]->childMenuRefPtr->menuPtr;
84	if (cascadeMenuPtr->postCommandGeneration !=
85	tsdPtr->postCommandGeneration) {
86	cascadeMenuPtr->postCommandGeneration =
87	tsdPtr->postCommandGeneration;
88	result = PreprocessMenu(cascadeMenuPtr);
89	if (result != TCL_OK) {
90	goto done;
91	}
92	finished = 0;
93	break;
94	}
95	}
96	}
97	}
98	} while (!finished);
99
100	done:
101	Tcl_Release((ClientData)menuPtr);
102	return result;
103	}
104
105	/*
106	*----------------------------------------------------------------------
107	*
108	* TkPreprocessMenu --
109	*
110	* On the Mac and on Windows, all of the postcommand processing has
111	* to be done on the entire tree underneath the main window to be
112	* posted. This means that we have to traverse the menu tree and
113	* issue the postcommands for all of the menus that have cascades
114	* attached. Since the postcommands can change the menu structure while
115	* we are traversing, we have to be extremely careful. Basically, the
116	* idea is to traverse the structure until we succesfully process
117	* one postcommand. Then we start over, and do it again until
118	* we traverse the whole structure without processing any postcommands.
119	*
120	* We are also going to set up the cascade back pointers in here
121	* since we have to traverse the entire structure underneath the menu
122	* anyway, We can clear the postcommand marks while we do that.
123	*
124	* Results:
125	* The return value is a standard Tcl result (errors can occur
126	* while the postcommands are being processed).
127	*
128	* Side effects:
129	* Since commands can get executed while this routine is being executed,
130	* the entire world can change.
131	*
132	*----------------------------------------------------------------------
133	*/
134
135	int
136	TkPreprocessMenu(menuPtr)
137	TkMenu *menuPtr;
138	{
139	ThreadSpecificData tsdPtr = (ThreadSpecificData )
140	Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
141
142	tsdPtr->postCommandGeneration++;
143	menuPtr->postCommandGeneration = tsdPtr->postCommandGeneration;
144	return PreprocessMenu(menuPtr);
145	}
146
147	/* End of tkmacwinmenu.c */