From ef8557187a95ee9426d817fa54e1d4a38f6be87b Mon Sep 17 00:00:00 2001
From: Max <post@wickenrode.com>
Date: Thu, 18 Jun 2015 23:03:46 +0200
Subject: Fix a crash when the database popup was removed from the toolbar (why
 would you do that!?) (fixes #2147)

---
 Source/SPDatabaseDocument.m | 45 ++++++++++++++++++++++++++++++++++++---------
 1 file changed, 36 insertions(+), 9 deletions(-)

diff --git a/Source/SPDatabaseDocument.m b/Source/SPDatabaseDocument.m
index 0b4abdb9..3b095f96 100644
--- a/Source/SPDatabaseDocument.m
+++ b/Source/SPDatabaseDocument.m
@@ -279,7 +279,19 @@ static NSString *SPAlterDatabaseAction = @"SPAlterDatabase";
 	if (_mainNibLoaded) return;
 
 	_mainNibLoaded = YES;
-
+	
+	// This one is a bit tricky: The chooseDatabaseButton is only retained
+	// by its superview which is kept in "nibObjectsToRelease". However once
+	// we pass the button to the NSToolbarItem with setView: the toolbar item
+	// will take over the ownership as its new superview.
+	//   That would mean if the toolbar item is removed from the toolbar, it
+	// will be dealloc'd and so will the chooseDatabaseButton, causing havoc.
+	//   The correct thing to do would be to create a new instance for each
+	// call by the toolbar, but right now the other code relies on the
+	// popup being a "singleton".
+	[chooseDatabaseButton retain];
+	[historyControl retain];
+	
 	// Set up the toolbar
 	[self setupToolbar];
 
@@ -3911,9 +3923,6 @@ static NSString *SPAlterDatabaseAction = @"SPAlterDatabase";
 	// set ourself as the delegate
 	[mainToolbar setDelegate:self];
 
-	// update the toolbar item size
-	[self updateChooseDatabaseToolbarItemWidth];
-
 	// The history controller needs to track toolbar item state - trigger setup.
 	[spHistoryControllerInstance setupInterface];
 }
@@ -3943,11 +3952,6 @@ static NSString *SPAlterDatabaseAction = @"SPAlterDatabase";
 		[chooseDatabaseButton setAction:@selector(chooseDatabase:)];
 		[chooseDatabaseButton setEnabled:(_isConnected && !_isWorkingLevel)];
 
-		if (willBeInsertedIntoToolbar) {
-			chooseDatabaseToolbarItem = toolbarItem;
-			[self updateChooseDatabaseToolbarItemWidth];
-		} 
-
 	} else if ([itemIdentifier isEqualToString:SPMainToolbarHistoryNavigation]) {
 		[toolbarItem setLabel:NSLocalizedString(@"Table History", @"toolbar item for navigation history")];
 		[toolbarItem setPaletteLabel:[toolbarItem label]];
@@ -4053,6 +4057,25 @@ static NSString *SPAlterDatabaseAction = @"SPAlterDatabase";
 	return toolbarItem;
 }
 
+- (void)toolbarWillAddItem:(NSNotification *)notification
+{
+	NSToolbarItem *toAdd = [[notification userInfo] objectForKey:@"item"];
+	
+	if([[toAdd itemIdentifier] isEqualToString:SPMainToolbarDatabaseSelection]) {
+		chooseDatabaseToolbarItem = toAdd;
+		[self updateChooseDatabaseToolbarItemWidth];
+	}
+}
+
+- (void)toolbarDidRemoveItem:(NSNotification *)notification
+{
+	NSToolbarItem *removed = [[notification userInfo] objectForKey:@"item"];
+	
+	if([[removed itemIdentifier] isEqualToString:SPMainToolbarDatabaseSelection]) {
+		chooseDatabaseToolbarItem = nil;
+	}
+}
+
 /**
  * toolbar delegate method
  */
@@ -6284,6 +6307,10 @@ static NSString *SPAlterDatabaseAction = @"SPAlterDatabase";
 	[[NSNotificationCenter defaultCenter] removeObserver:self];
 	[NSObject cancelPreviousPerformRequestsWithTarget:self];
 	
+	// see -(void)awakeFromNib for the reasoning behind this.
+	SPClear(chooseDatabaseButton);
+	SPClear(historyControl);
+	
 #ifndef SP_CODA /* release nib objects */
 	for (id retainedObject in nibObjectsToRelease) [retainedObject release];
 	
-- 
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