Fix visibility of toolbar in full screen

The toolbar will pop up when the mouse is moved to the top of the screen
in full screen mode if and only if it is visible outside of full screen
mode.

Bug: if the toolbar is toggled in full screen mode then sometimes it is
no longer possible to enable it after exiting full screen.

src/MacVim/MMVimController.h

@@ -27,8 +27,11 @@
     id                  backendProxy;
     NSMenu              *mainMenu;
     NSMutableArray      *popupMenuItems;
+
+    // TODO: Move all toolbar code to window controller?
     NSToolbar           *toolbar;
     NSMutableDictionary *toolbarItemDict;
+
     int                 pid;
     NSString            *serverName;
     NSDictionary        *vimState;

src/MacVim/MMWindowController.h

@@ -42,6 +42,7 @@
     int                 userCols;
     NSPoint             userTopLeft;
     NSPoint             defaultTopLeft;
+    NSToolbar           *toolbar;
 }
 
 - (id)initWithVimController:(MMVimController *)controller;

src/MacVim/MMWindowController.m

@@ -203,6 +203,7 @@
     [decoratedWindow release];  decoratedWindow = nil;
     [windowAutosaveKey release];  windowAutosaveKey = nil;
     [vimView release];  vimView = nil;
+    [toolbar release];  toolbar = nil;
 
     [super dealloc];
 }
@@ -389,9 +390,14 @@
     [fullscreenWindow setRepresentedFilename:filename];
 }
 
-- (void)setToolbar:(NSToolbar *)toolbar
+- (void)setToolbar:(NSToolbar *)theToolbar
 {
-    // The full-screen window has no toolbar.
+    if (theToolbar != toolbar) {
+        [toolbar release];
+        toolbar = [theToolbar retain];
+    }
+
+    // NOTE: Toolbar must be set here or it won't work to show it later.
     [decoratedWindow setToolbar:toolbar];
 
     // HACK! Redirect the pill button so that we can ask Vim to hide the
@@ -530,10 +536,9 @@
     // Showing the tabline may result in the tabline separator being hidden or
     // shown; this does not apply to full-screen mode.
     if (!on) {
-        NSToolbar *toolbar = [decoratedWindow toolbar]; 
         if (([decoratedWindow styleMask] & NSTexturedBackgroundWindowMask)
                 == 0) {
-            [self hideTablineSeparator:![toolbar isVisible]];
+            [self hideTablineSeparator:![decoratedWindow toolbar]];
         } else {
             [self hideTablineSeparator:NO];
         }
@@ -549,7 +554,6 @@
 
 - (void)showToolbar:(BOOL)on size:(int)size mode:(int)mode
 {
-    NSToolbar *toolbar = [decoratedWindow toolbar];
     if (!toolbar) return;
 
     [toolbar setSizeMode:size];
@@ -1350,12 +1354,11 @@
 
 - (void)updateToolbar
 {
-    NSToolbar *toolbar = [decoratedWindow toolbar];
     if (nil == toolbar || 0 == updateToolbarFlag) return;
 
     // Positive flag shows toolbar, negative hides it.
     BOOL on = updateToolbarFlag > 0 ? YES : NO;
-    [toolbar setVisible:on];
+    [decoratedWindow setToolbar:(on ? toolbar : nil)];
 
     if (([decoratedWindow styleMask] & NSTexturedBackgroundWindowMask) == 0) {
         if (!on) {
@@ -1421,4 +1424,3 @@
 
 @end // MMWindowController (Private)
 
-