Allow never opening window + terminate on last window, with guards

src/MacVim/Base.lproj/Preferences.xib

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="20037" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES">
+<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="17701" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES">
     <dependencies>
         <deployment version="1090" identifier="macosx"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="20037"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="17701"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <objects>
@@ -67,7 +67,6 @@
                                 </column>
                             </cells>
                             <connections>
-                                <action selector="openUntitledWindowChanged:" target="-2" id="S8l-uX-tEl"/>
                                 <binding destination="58" name="selectedTag" keyPath="values.MMUntitledWindow" id="171"/>
                             </connections>
                         </matrix>
@@ -180,7 +179,6 @@
                                 </menu>
                             </popUpButtonCell>
                             <connections>
-                                <action selector="lastWindowClosedChanged:" target="-2" id="IcT-7v-gxr"/>
                                 <binding destination="58" name="selectedIndex" keyPath="values.MMLastWindowClosedBehavior" id="968"/>
                             </connections>
                         </popUpButton>

src/MacVim/MMAppController.h

@@ -49,6 +49,8 @@
     int                 numChildProcesses;
     NSMutableDictionary *inputQueues;
     int                 processingFlag;
+
+    BOOL                hasShownWindowBefore;
 
 #if !DISABLE_SPARKLE
 #if USE_SPARKLE_1

src/MacVim/MMAppController.m

@@ -548,17 +548,15 @@ - (void)application:(NSApplication *)sender openFiles:(NSArray *)filenames
 
 - (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)sender
 {
-    if (MMUntitledWindowNever ==
-        [[NSUserDefaults standardUserDefaults]
-         integerForKey:MMUntitledWindowKey]) {
-        // Sanity protection: If we never open a new window on application launch, there could
-        // be an issue here where we immediately terminate MacVim. Because of that, we always
-        // return false regardless of what MMLastWindowClosedBehavior is. Note that the user
-        // should not be able to set these two conflicting options together in the preference pane
-        // but it's possible to do so in the terminal by calling "defaults" manually.
-        return false;
+    if (!hasShownWindowBefore) {
+        // If we have not opened a window before, never return YES. This can
+        // happen when MacVim is not configured to open window at launch. We
+        // want to give the user a chance to open a window first. Otherwise
+        // just opening the About MacVim or Settings windows could immediately
+        // terminate the app (since those are not proper app windows),
+        // depending if the OS feels like invoking this method.
+        return NO;
     }
-
     return (MMTerminateWhenLastWindowClosed ==
             [[NSUserDefaults standardUserDefaults]
                 integerForKey:MMLastWindowClosedBehaviorKey]);
@@ -899,6 +897,8 @@ - (void)windowControllerWillOpen:(MMWindowController *)windowController
         [NSApp activateIgnoringOtherApps:YES];
         shouldActivateWhenNextWindowOpens = NO;
     }
+
+    hasShownWindowBefore = YES;
 }
 
 - (void)setMainMenu:(NSMenu *)mainMenu

src/MacVim/MMPreferenceController.m

@@ -167,36 +167,6 @@ - (IBAction)fontPropertiesChanged:(id)sender
     [[MMAppController sharedInstance] refreshAllFonts];
 }
 
--(IBAction)lastWindowClosedChanged:(id)sender
-{
-    // Sanity checking for terminate when last window closed + not opening an untitled window.
-    // This results in a potentially awkward situation wehre MacVim will close itself since it
-    // doesn't have any window opened when launched.
-    // Note that the potentially bad behavior is already protected against for in applicationShouldTerminateAfterLastWindowClosed:,
-    // but this sanity checking is to make sure the user can see that in an explicit fashion.
-    NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
-    if ([defaults integerForKey:MMLastWindowClosedBehaviorKey] == MMTerminateWhenLastWindowClosed) {
-        if ([defaults integerForKey:MMUntitledWindowKey] == MMUntitledWindowNever) {
-            [defaults setInteger:MMUntitledWindowOnOpen forKey:MMUntitledWindowKey];
-        }
-    }
-}
-
--(IBAction)openUntitledWindowChanged:(id)sender
-{
-    // Sanity checking for terminate when last window closed + not opening an untitled window.
-    // This results in a potentially awkward situation wehre MacVim will close itself since it
-    // doesn't have any window opened when launched.
-    // Note that the potentially bad behavior is already protected against for in applicationShouldTerminateAfterLastWindowClosed:,
-    // but this sanity checking is to make sure the user can see that in an explicit fashion.
-    NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
-    if ([defaults integerForKey:MMLastWindowClosedBehaviorKey] == MMTerminateWhenLastWindowClosed) {
-        if ([defaults integerForKey:MMUntitledWindowKey] == MMUntitledWindowNever) {
-            [defaults setInteger:MMHideWhenLastWindowClosed forKey:MMLastWindowClosedBehaviorKey];
-        }
-    }
-}
-
 - (IBAction)smoothResizeChanged:(id)sender
 {
     [[MMAppController sharedInstance] refreshAllResizeConstraints];