Be careful not to try to get information from windows we don't own, or that

don't exist at all.  Also a small PuTTYgen change that I can't be bothered
to filter out of this commit.

[originally from svn r2874]

mac/mac.c

@@ -1,4 +1,4 @@
-/* $Id: mac.c,v 1.49 2003/02/15 16:22:15 ben Exp $ */
+/* $Id: mac.c,v 1.50 2003/02/20 22:31:52 ben Exp $ */
 /*
  * Copyright (c) 1999, 2003 Ben Harris
  * All rights reserved.
@@ -377,7 +377,7 @@ static int mac_windowtype(WindowPtr window)
 static void mac_keypress(EventRecord *event) {
     WindowPtr window;
 
-    window = FrontWindow();
+    window = mac_frontwindow();
     /*
      * Check for a command-key combination, but ignore it if it counts
      * as a meta-key combination and we're in a terminal window.
@@ -388,7 +388,7 @@ static void mac_keypress(EventRecord *event) {
 	mac_adjustmenus();
 	mac_menucommand(MenuKey(event->message & charCodeMask));
     } else {
-	if (mac_wininfo(window)->key != NULL)
+	if (window != NULL && mac_wininfo(window)->key != NULL)
 	    (*mac_wininfo(window)->key)(window, event);
     }       
 }
@@ -402,7 +402,7 @@ static void mac_menucommand(long result) {
 
     menu = HiWord(result);
     item = LoWord(result);
-    window = FrontWindow();
+    window = mac_frontwindow();
     /* Things which do the same whatever window we're in. */
     switch (menu) {
       case mApple:
@@ -445,7 +445,7 @@ static void mac_menucommand(long result) {
         break;
     }
     /* If we get here, handling is up to window-specific code. */
-    if (mac_wininfo(window)->menu != NULL)
+    if (window != NULL && mac_wininfo(window)->menu != NULL)
 	(*mac_wininfo(window)->menu)(window, menu, item);
 
   done:
@@ -483,7 +483,7 @@ static void mac_adjustmenus(void) {
     WindowPtr window;
     MenuHandle menu;
 
-    window = FrontWindow();
+    window = mac_frontwindow();
     menu = GetMenuHandle(mApple);
     EnableItem(menu, 0);
     EnableItem(menu, iAbout);
@@ -497,7 +497,7 @@ static void mac_adjustmenus(void) {
 	DisableItem(menu, iClose);
     EnableItem(menu, iQuit);
 
-    if (mac_wininfo(window)->adjustmenus != NULL)
+    if (window != NULL && mac_wininfo(window)->adjustmenus != NULL)
 	(*mac_wininfo(window)->adjustmenus)(window);
     else {
 	DisableItem(menu, iSave);

mac/mac.h

@@ -112,10 +112,16 @@ extern Session *sesslist;
 /* PuTTYgen per-window state */
 typedef struct KeyState {
     DialogPtr		box;
+    int collecting_entropy;
+    int entropy_got, entropy_required, entropy_size;
+    unsigned *entropy;
+    ControlHandle	progress;
 } KeyState;
 
 #define mac_windowkey(w)	(((WinInfo *)GetWRefCon(w))->ks)
 
+/* from macmisc.c */
+extern WindowPtr mac_frontwindow(void);
 /* from macdlg.c */
 extern void mac_newsession(void);
 extern void mac_dupsession(void);

mac/macmisc.c

@@ -1,4 +1,4 @@
-/* $Id: macmisc.c,v 1.1 2003/02/12 23:53:15 ben Exp $ */
+/* $Id: macmisc.c,v 1.2 2003/02/20 22:31:52 ben Exp $ */
 /*
  * Copyright (c) 1999, 2003 Ben Harris
  * All rights reserved.
@@ -28,6 +28,8 @@
 #include <MacTypes.h>
 #include <Dialogs.h>
 #include <Files.h>
+#include <MacWindows.h>
+#include <Processes.h>
 #include <Quickdraw.h>
 #include <TextUtils.h>
 
@@ -35,6 +37,7 @@
 #include <stdio.h>
 
 #include "putty.h"
+#include "mac.h"
 
 #if TARGET_API_MAC_CARBON
 /*
@@ -48,6 +51,22 @@ const CFAllocatorRef kCFAllocatorDefault = NULL;
 QDGlobals qd;
 #endif
 
+/*
+ * Like FrontWindow(), but return NULL if we aren't the front process
+ * (i.e. the front window isn't one of ours).
+ */
+WindowPtr mac_frontwindow(void)
+{
+    ProcessSerialNumber frontpsn;
+    ProcessSerialNumber curpsn = { 0, kCurrentProcess };
+    Boolean result;
+
+    GetFrontProcess(&frontpsn);
+    if (SameProcess(&frontpsn, &curpsn, &result) == noErr && result)
+	return FrontWindow();
+    return NULL;
+}
+
 void fatalbox(char *fmt, ...) {
     va_list ap;
     Str255 stuff;