Fix non-native full screen menu sizing / make resize option updates immediate

Problem: Non-native full screen screen has an option to show the menu
bar but it does not work properly in some multi-monitor scenarios. On a
MacBook with a notch it would sometimes use the thicker notch menu bar
height even when going full screen on a regular monitor, and when using
a single Space for all displays it would also show a black bar on top on
the screen that does not have the menu bar.

Solution: Use the NSScreen visibleFrame API exclusively instead of
querying the menu bar height which seems to be inconsistent. There are
some quirks with this API (e.g. a one-pixel gap) but we already handle
it when handling non-native full screen on a laptop screen with notch so
it's best to consolidate the code paths.

Also, make the "show menu bar" option immediate when changing it in
preference pane. As a corollary, this also makes changing "smooth
scrolling" option immediate, as well as liveResizeDidEnd's delayed
pending resize.

Author: ychin

src/MacVim/Base.lproj/Preferences.xib

@@ -507,6 +507,7 @@
                                 </connections>
                             </buttonCell>
                             <connections>
+                                <action selector="nonNativeFullScreenShowMenuChanged:" target="-1" id="7gA-SN-OaM"/>
                                 <binding destination="58" name="value" keyPath="values.MMNonNativeFullScreenShowMenu" id="5wX-jg-QPo"/>
                             </connections>
                         </button>

src/MacVim/MMAppController.h

@@ -83,11 +83,13 @@
 - (NSArray *)filterOpenFiles:(NSArray *)filenames;
 - (BOOL)openFiles:(NSArray *)filenames withArguments:(NSDictionary *)args;
 
+// Refresh functions are used by preference pane to push through settings changes
 - (void)refreshAllAppearances;
 - (void)refreshAllTabProperties;
 - (void)refreshAllFonts;
 - (void)refreshAllResizeConstraints;
 - (void)refreshAllTextViews;
+- (void)refreshAllFullScreenPresentationOptions;
 
 - (void)openNewWindow:(enum NewWindowMode)mode activate:(BOOL)activate extraArgs:(NSArray *)args;
 - (void)openNewWindow:(enum NewWindowMode)mode activate:(BOOL)activate;

src/MacVim/MMAppController.m

@@ -38,6 +38,7 @@
  */
 
 #import "MMAppController.h"
+#import "MMFullScreenWindow.h"
 #import "MMPreferenceController.h"
 #import "MMVimController.h"
 #import "MMVimView.h"
@@ -1272,6 +1273,19 @@ - (void)refreshAllTextViews
     }
 }
 
+/// Refresh all non-native full screen windows to update their presentation
+/// options (show/hide menu and dock).
+- (void)refreshAllFullScreenPresentationOptions
+{
+    for (MMVimController *vc in vimControllers) {
+        MMFullScreenWindow *fullScreenWindow = vc.windowController.fullScreenWindow;
+        if (fullScreenWindow != nil) {
+            [fullScreenWindow updatePresentationOptions];
+            [vc.windowController resizeVimView];
+        }
+    }
+}
+
 - (BOOL)validateMenuItem:(NSMenuItem *)item
 {
     if ([item action] == @selector(showWhatsNew:)) {

src/MacVim/MMFullScreenWindow.h

@@ -35,6 +35,7 @@
 - (MMFullScreenWindow *)initWithWindow:(NSWindow *)t view:(MMVimView *)v
                                backgroundColor:(NSColor *)back;
 - (void)setOptions:(int)opt;
+- (void)updatePresentationOptions;
 - (void)enterFullScreen;
 - (void)leaveFullScreen;
 - (NSRect)getDesiredFrame;

src/MacVim/MMFullScreenWindow.m

@@ -134,6 +134,22 @@ - (void)setOptions:(int)opt
     options = opt;
 }
 
+- (void)updatePresentationOptions
+{
+    // Hide Dock and menu bar when going to full screen. Only do so if the current screen
+    // has a menu bar and dock.
+    if ([self screenHasDockAndMenu]) {
+        const bool showMenu = [[NSUserDefaults standardUserDefaults]
+                               boolForKey:MMNonNativeFullScreenShowMenuKey];
+
+        [NSApplication sharedApplication].presentationOptions = showMenu ?
+            NSApplicationPresentationAutoHideDock :
+            NSApplicationPresentationAutoHideDock | NSApplicationPresentationAutoHideMenuBar;
+    } else {
+        [NSApplication sharedApplication].presentationOptions = NSApplicationPresentationDefault;
+    }
+}
+
 - (void)enterFullScreen
 {
     ASLogDebug(@"Enter full-screen now");
@@ -147,16 +163,7 @@ - (void)enterFullScreen
     [winController setWindow:nil];
     [target setDelegate:nil];
 
-    // Hide Dock and menu bar when going to full screen. Only do so if the current screen
-    // has a menu bar and dock.
-    if ([self screenHasDockAndMenu]) {
-        const bool showMenu = [[NSUserDefaults standardUserDefaults]
-                               boolForKey:MMNonNativeFullScreenShowMenuKey];
-
-        [NSApplication sharedApplication].presentationOptions = showMenu ?
-            NSApplicationPresentationAutoHideDock :
-            NSApplicationPresentationAutoHideDock | NSApplicationPresentationAutoHideMenuBar;
-    }
+    [self updatePresentationOptions];
 
     // fade to black
     Boolean didBlend = NO;
@@ -376,6 +383,10 @@ - (void)applicationDidChangeScreenParameters:(NSNotification *)notification
 - (NSEdgeInsets) viewOffset {
     NSEdgeInsets offset = NSEdgeInsetsMake(0, 0, 0, 0);
 
+    NSScreen *screen = [self screen];
+    if (screen == nil)
+        return offset;
+
     NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
     const BOOL showMenu = [ud boolForKey:MMNonNativeFullScreenShowMenuKey];
 
@@ -390,29 +401,28 @@ - (NSEdgeInsets) viewOffset {
         // In the future there may be more. E.g. we can draw tabs in the safe area.
         // If menu is shown, we ignore this because this doesn't make sense.
         if (safeAreaBehavior == 0 || showMenu) {
-            offset = [self screen].safeAreaInsets;
+            offset = screen.safeAreaInsets;
         }
     }
 #endif
 
     if (showMenu) {
-        // Offset by menu height
-        if (offset.top == 0) {
-            const CGFloat menuBarHeight = [[[NSApplication sharedApplication] mainMenu] menuBarHeight];
-            if (menuBarHeight > offset.top) {
-                offset.top = menuBarHeight;
-            }
-        } else {
-            // Unfortunately, if there is a notch (safe area != 0), menuBarHeight does *not* return
-            // the menu height shown in the main screen, so we need to calculate it otherwise.
-            // visibleArea is supposed to give us this information but it's oddly off by one, leading
-            // to a one-pixel black line, so we need to manually increment it by one. Yes, it sucks.
-            NSRect visibleFrame = [self screen].visibleFrame;
-            visibleFrame.size.height += 1;
-            const CGFloat menuBarHeight = [self screen].frame.size.height - NSMaxY(visibleFrame);
-            if (menuBarHeight > offset.top) {
-                offset.top = menuBarHeight;
-            }
+        // Offset by menu height. We use NSScreen's visibleFrame which is the
+        // most reliable way to do so, as NSApp.mainMenu.menuBarHeight could
+        // give us the wrong height if one screen is a laptop screen with
+        // notch, or the user has configured to use single Space for all
+        // screens and we're in a screen without the menu bar.
+        //
+        // Quirks of visibleFrame API:
+        // - It oddly leaves a one pixel gap between menu bar and screen,
+        //   leading to a black bar. We manually adjust for it.
+        // - It will sometimes leave room for the Dock even when it's
+        //   auto-hidden (depends on screen configuration and OS version). As
+        //   such we just use the max Y component (where the menu is) and
+        //   ignore the rest.
+        const CGFloat menuBarHeight = NSMaxY(screen.frame) - NSMaxY(screen.visibleFrame);
+        if (menuBarHeight > offset.top) {
+            offset.top = menuBarHeight - 1;
         }
     }
 
@@ -514,14 +524,7 @@ - (BOOL)screenHasDockAndMenu
 - (void)windowDidBecomeMain:(NSNotification *)notification
 {
     // Hide menu and dock when this window gets focus.
-    if ([self screenHasDockAndMenu]) {
-        const bool showMenu = [[NSUserDefaults standardUserDefaults]
-                               boolForKey:MMNonNativeFullScreenShowMenuKey];
-
-        [NSApplication sharedApplication].presentationOptions = showMenu ?
-            NSApplicationPresentationAutoHideDock :
-            NSApplicationPresentationAutoHideDock | NSApplicationPresentationAutoHideMenuBar;
-    }
+    [self updatePresentationOptions];
 }
 
 
@@ -530,9 +533,7 @@ - (void)windowDidResignMain:(NSNotification *)notification
     // Un-hide menu/dock when we lose focus. This makes sure if we have multiple
     // windows opened, when the non-fullscreen windows get focus they will have the
     // dock and menu showing (since presentationOptions is per-app, not per-window).
-    if ([self screenHasDockAndMenu]) {
-        [NSApplication sharedApplication].presentationOptions = NSApplicationPresentationDefault;
-    }
+    [NSApplication sharedApplication].presentationOptions = NSApplicationPresentationDefault;
 }
 
 - (void)windowDidMove:(NSNotification *)notification
@@ -558,6 +559,10 @@ - (void)windowDidMove:(NSNotification *)notification
     // Ensure the full-screen window is still covering the entire screen and
     // then resize view according to 'fuopt'.
     [self setFrame:[screen frame] display:NO];
+
+    if ([self isMainWindow]) {
+        [self updatePresentationOptions];
+    }
 }
 
 @end // MMFullScreenWindow (Private)

src/MacVim/MMPreferenceController.h

@@ -40,5 +40,6 @@
 // Appearance pane
 - (IBAction)fontPropertiesChanged:(id)sender;
 - (IBAction)tabsPropertiesChanged:(id)sender;
+- (IBAction)nonNativeFullScreenShowMenuChanged:(id)sender;
 
 @end

src/MacVim/MMPreferenceController.m

@@ -182,4 +182,9 @@ - (IBAction)cmdlineAlignBottomChanged:(id)sender
     [[MMAppController sharedInstance] refreshAllTextViews];
 }
 
+- (IBAction)nonNativeFullScreenShowMenuChanged:(id)sender
+{
+    [[MMAppController sharedInstance] refreshAllFullScreenPresentationOptions];
+}
+
 @end

src/MacVim/MMVimController.h

@@ -60,6 +60,8 @@
 /// E.g. ".AppleSystemUIFontMonospaced-Medium" -> "-monospace-Medium"
 @property (nonatomic, readonly) NSMutableDictionary<NSString*, NSString*>* systemFontNamesToAlias;
 
+@property (nonatomic, readonly) BOOL isHandlingInputQueue;
+
 - (id)initWithBackend:(id)backend pid:(int)processIdentifier;
 - (void)uninitialize;
 - (unsigned long)vimControllerId;

src/MacVim/MMVimController.m

@@ -557,6 +557,8 @@ - (void)processInputQueue:(NSArray *)queue
 {
     if (!isInitialized) return;
 
+    _isHandlingInputQueue = YES;
+
     // NOTE: This method must not raise any exceptions (see comment in the
     // calling method).
     @try {
@@ -566,6 +568,7 @@ - (void)processInputQueue:(NSArray *)queue
     @catch (NSException *ex) {
         ASLogDebug(@"Exception: pid=%d id=%lu reason=%@", pid, identifier, ex);
     }
+    _isHandlingInputQueue = NO;
 }
 
 - (NSToolbarItem *)toolbar:(NSToolbar *)theToolbar

src/MacVim/MMWindowController.h

@@ -62,6 +62,7 @@
 - (id)initWithVimController:(MMVimController *)controller;
 - (MMVimController *)vimController;
 - (MMVimView *)vimView;
+- (MMFullScreenWindow*)fullScreenWindow;
 - (NSString *)windowAutosaveKey;
 - (void)setWindowAutosaveKey:(NSString *)key;
 - (void)cleanup;