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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import "components/remote_cocoa/app_shim/native_widget_mac_overlay_nswindow.h"
#include <AppKit/AppKit.h>
// Overlay windows are used to render top chrome components while in immersive
// fullscreen. Those rendered views are hosted in a separate AppKit controlled
// window. The overlay windows are a transparent overlay on top of the AppKit
// hosted views, allowing for secondary UI to be aligned properly. Only allow
// `NSWindowCollectionBehaviorTransient` and
// `NSWindowCollectionBehaviorIgnoresCycle` to be set. Other collection
// behaviors can be problematic. In particular,
// `NSWindowCollectionBehaviorPrimary`, when set on an overlay window, can cause
// crashes. See https://crbug.com/348713769 for more info.
constexpr unsigned long kAllowedCollectionBehaviorMask =
(NSWindowCollectionBehaviorTransient |
NSWindowCollectionBehaviorIgnoresCycle);
@implementation NativeWidgetMacOverlayNSWindow
- (void)setCollectionBehavior:(NSWindowCollectionBehavior)collectionBehavior {
[super setCollectionBehavior:collectionBehavior &
kAllowedCollectionBehaviorMask];
}
// Paint the window a mostly opaque color.
- (void)debugWithColor:(NSColor*)color {
self.backgroundColor = color;
self.alphaValue = 0.3;
self.contentView = [[NSView alloc] init];
}
@end
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