fix: persist maximizable state through theme change (#22677)

shell/browser/native_window_mac.h

@@ -151,7 +151,7 @@ class NativeWindowMac : public NativeWindow, public ui::NativeThemeObserver {
   void SetWindowLevel(int level);
 
   // Custom traffic light positioning
-  void RepositionTrafficLights();
+  void RedrawTrafficLights();
   void SetExitingFullScreen(bool flag);
   void SetTrafficLightPosition(const gfx::Point& position) override;
   gfx::Point GetTrafficLightPosition() const override;
@@ -222,6 +222,9 @@ class NativeWindowMac : public NativeWindow, public ui::NativeThemeObserver {
   // setWindowButtonVisibility().
   base::Optional<bool> window_button_visibility_;
 
+  // Maximizable window state; necessary for persistence through redraws.
+  bool maximizable_ = true;
+
   // Simple (pre-Lion) Fullscreen Settings
   bool always_simple_fullscreen_ = false;
   bool is_simple_fullscreen_ = false;

shell/browser/native_window_mac.mm

@@ -47,13 +47,13 @@
 // This view would inform Chromium to resize the hosted views::View.
 //
 // The overrided methods should behave the same with BridgedContentView.
-@interface ElectronAdapatedContentView : NSView {
+@interface ElectronAdaptedContentView : NSView {
  @private
   views::NativeWidgetMacNSWindowHost* bridge_host_;
 }
 @end
 
-@implementation ElectronAdapatedContentView
+@implementation ElectronAdaptedContentView
 
 - (id)initWithShell:(electron::NativeWindowMac*)shell {
   if ((self = [self init])) {
@@ -519,7 +519,10 @@ NativeWindowMac::~NativeWindowMac() {
     [NSEvent removeMonitor:wheel_event_monitor_];
 }
 
-void NativeWindowMac::RepositionTrafficLights() {
+void NativeWindowMac::RedrawTrafficLights() {
+  // Ensure maximizable options retain pre-existing state.
+  SetMaximizable(maximizable_);
+
   if (!traffic_light_position_.x() && !traffic_light_position_.y()) {
     return;
   }
@@ -708,7 +711,7 @@ void NativeWindowMac::SetExitingFullScreen(bool flag) {
 
 void NativeWindowMac::OnNativeThemeUpdated(ui::NativeTheme* observed_theme) {
   base::PostTask(FROM_HERE, {content::BrowserThread::UI},
-                 base::BindOnce(&NativeWindowMac::RepositionTrafficLights,
+                 base::BindOnce(&NativeWindowMac::RedrawTrafficLights,
                                 base::Unretained(this)));
 }
 
@@ -930,6 +933,7 @@ bool NativeWindowMac::IsMinimizable() {
 }
 
 void NativeWindowMac::SetMaximizable(bool maximizable) {
+  maximizable_ = maximizable;
   [[window_ standardWindowButton:NSWindowZoomButton] setEnabled:maximizable];
 }
 
@@ -1009,8 +1013,7 @@ void NativeWindowMac::SetWindowLevel(int unbounded_level) {
 
   // Set level will make the zoom button revert to default, probably
   // a bug of Cocoa or macOS.
-  [[window_ standardWindowButton:NSWindowZoomButton]
-      setEnabled:was_maximizable_];
+  SetMaximizable(was_maximizable_);
 
   // This must be notified at the very end or IsAlwaysOnTop
   // will not yet have been updated to reflect the new status
@@ -1034,7 +1037,7 @@ void NativeWindowMac::Invalidate() {
 void NativeWindowMac::SetTitle(const std::string& title) {
   [window_ setTitle:base::SysUTF8ToNSString(title)];
   if (title_bar_style_ == TitleBarStyle::HIDDEN) {
-    RepositionTrafficLights();
+    RedrawTrafficLights();
   }
 }
 
@@ -1554,7 +1557,7 @@ void NativeWindowMac::SetVibrancy(const std::string& type) {
 
 void NativeWindowMac::SetTrafficLightPosition(const gfx::Point& position) {
   traffic_light_position_ = position;
-  RepositionTrafficLights();
+  RedrawTrafficLights();
 }
 
 gfx::Point NativeWindowMac::GetTrafficLightPosition() const {
@@ -1683,7 +1686,7 @@ void NativeWindowMac::AddContentViewLayers(bool minimizable, bool closable) {
     // Some third-party macOS utilities check the zoom button's enabled state to
     // determine whether to show custom UI on hover, so we disable it here to
     // prevent them from doing so in a frameless app window.
-    [[window_ standardWindowButton:NSWindowZoomButton] setEnabled:NO];
+    SetMaximizable(false);
   }
 }
 
@@ -1722,7 +1725,7 @@ void NativeWindowMac::OverrideNSWindowContentView() {
   // content view with a simple NSView.
   if (has_frame()) {
     container_view_.reset(
-        [[ElectronAdapatedContentView alloc] initWithShell:this]);
+        [[ElectronAdaptedContentView alloc] initWithShell:this]);
   } else {
     container_view_.reset([[FullSizeContentView alloc] init]);
     [container_view_ setFrame:[[[window_ contentView] superview] bounds]];

shell/browser/ui/cocoa/electron_ns_window_delegate.mm

@@ -137,7 +137,7 @@ using TitleBarStyle = electron::NativeWindowMac::TitleBarStyle;
   [super windowDidResize:notification];
   shell_->NotifyWindowResize();
   if (shell_->title_bar_style() == TitleBarStyle::HIDDEN) {
-    shell_->RepositionTrafficLights();
+    shell_->RedrawTrafficLights();
   }
 }
 
@@ -254,7 +254,7 @@ using TitleBarStyle = electron::NativeWindowMac::TitleBarStyle;
   }
   shell_->SetExitingFullScreen(true);
   if (shell_->title_bar_style() == TitleBarStyle::HIDDEN) {
-    shell_->RepositionTrafficLights();
+    shell_->RedrawTrafficLights();
   }
 }
 
@@ -263,7 +263,7 @@ using TitleBarStyle = electron::NativeWindowMac::TitleBarStyle;
   shell_->NotifyWindowLeaveFullScreen();
   shell_->SetExitingFullScreen(false);
   if (shell_->title_bar_style() == TitleBarStyle::HIDDEN) {
-    shell_->RepositionTrafficLights();
+    shell_->RedrawTrafficLights();
   }
 }