cocoa-cb: change border and borderless window styling

the title bar is now within the window bounds instead of outside. same
as QuickTime Player. it supports several standard styles, two dark and
two light ones. additionally we have properly rounded corners now and
the borderless window also has the proper window shadow.

Also make the earliest supported macOS version 10.10.

Fixes #4789, #3944

1 files changed, 106 insertions, 12 deletions

diff --git a/video/out/cocoa-cb/window.swift b/video/out/cocoa-cb/window.swift
index 869bfb8be6..bd94330dcb 100644
--- a/video/out/cocoa-cb/window.swift
+++ b/video/out/cocoa-cb/window.swift
@@ -49,6 +49,21 @@ class Window: NSWindow, NSWindowDelegate {
         }
     }
 
+    var border: Bool = true {
+        didSet { if !border { hideTitleBar() } }
+    }
+
+    var titleBarEffect: NSVisualEffectView?
+    var titleBar: NSView {
+        get { return (standardWindowButton(.closeButton)?.superview)! }
+    }
+    var titleBarHeight: CGFloat {
+        get { return NSWindow.frameRect(forContentRect: CGRect.zero, styleMask: .titled).size.height }
+    }
+    var titleButtons: [NSButton] {
+        get { return ([.closeButton, .miniaturizeButton, .zoomButton] as [NSWindow.ButtonType]).flatMap { standardWindowButton($0) } }
+    }
+
     override var canBecomeKey: Bool { return true }
     override var canBecomeMain: Bool { return true }
 
@@ -95,6 +110,94 @@ class Window: NSWindow, NSWindowDelegate {
         }
     }
 
+    func initTitleBar() {
+        var f = contentView!.bounds
+        f.origin.y = f.size.height - titleBarHeight
+        f.size.height = titleBarHeight
+
+        styleMask.insert(.fullSizeContentView)
+        titleBar.alphaValue = 0
+        titlebarAppearsTransparent = true
+        titleBarEffect = NSVisualEffectView(frame: f)
+        titleBarEffect!.alphaValue = 0
+        titleBarEffect!.blendingMode = .withinWindow
+        titleBarEffect!.autoresizingMask = [.viewWidthSizable, .viewMinYMargin]
+
+        setTitleBarStyle(mpv.getStringProperty("macos-title-bar-style") ?? "dark")
+        contentView!.addSubview(titleBarEffect!, positioned: .above, relativeTo: nil)
+
+        border = mpv.getBoolProperty("border")
+    }
+
+    func setTitleBarStyle(_ style: String) {
+        var effect = style
+        if effect == "auto" {
+            let systemStyle = UserDefaults.standard.string(forKey: "AppleInterfaceStyle")
+            effect = systemStyle == nil ? "mediumlight" : "ultradark"
+        }
+
+        switch effect {
+        case "mediumlight":
+            appearance = NSAppearance(named: NSAppearanceNameVibrantLight)
+            titleBarEffect!.material = .titlebar
+            titleBarEffect!.state = .followsWindowActiveState
+        case "light":
+            appearance = NSAppearance(named: NSAppearanceNameVibrantLight)
+            titleBarEffect!.material = .light
+            titleBarEffect!.state = .active
+        case "ultradark":
+            appearance = NSAppearance(named: NSAppearanceNameVibrantDark)
+            titleBarEffect!.material = .titlebar
+            titleBarEffect!.state = .followsWindowActiveState
+        case "dark": fallthrough
+        default:
+            appearance = NSAppearance(named: NSAppearanceNameVibrantDark)
+            titleBarEffect!.material = .dark
+            titleBarEffect!.state = .active
+        }
+    }
+
+    func showTitleBar() {
+        if !border && !isInFullscreen { return }
+        let loc = cocoaCB.view.convert(mouseLocationOutsideOfEventStream, from: nil)
+
+        titleButtons.forEach { $0.isHidden = false }
+        NSAnimationContext.runAnimationGroup({ (context) -> Void in
+            context.duration = 0.20
+            titleBar.animator().alphaValue = 1
+            if !isInFullscreen && !isAnimating {
+                titleBarEffect!.animator().alphaValue = 1
+            }
+        }, completionHandler: nil )
+
+        if loc.y > titleBarHeight {
+            hideTitleBarDelayed()
+        } else {
+            NSObject.cancelPreviousPerformRequests(withTarget: self, selector: #selector(hideTitleBar), object: nil)
+        }
+    }
+
+    func hideTitleBar() {
+        if isInFullscreen && !isAnimating {
+            titleBarEffect!.alphaValue = 0
+            return
+        }
+        NSAnimationContext.runAnimationGroup({ (context) -> Void in
+            context.duration = 0.20
+            titleBar.animator().alphaValue = 0
+            titleBarEffect!.animator().alphaValue = 0
+        }, completionHandler: {
+            self.titleButtons.forEach { $0.isHidden = true }
+        })
+    }
+
+    func hideTitleBarDelayed() {
+        NSObject.cancelPreviousPerformRequests(withTarget: self,
+                                                 selector: #selector(hideTitleBar),
+                                                   object: nil)
+        perform(#selector(hideTitleBar), with: nil, afterDelay: 0.5)
+    }
+
     override func toggleFullScreen(_ sender: Any?) {
         if isAnimating {
             return
@@ -146,6 +249,7 @@ class Window: NSWindow, NSWindowDelegate {
         let cRect = contentRect(forFrameRect: frame)
         var intermediateFrame = aspectFit(rect: cRect, in: targetScreen!.frame)
         intermediateFrame = frameRect(forContentRect: intermediateFrame)
+        hideTitleBar()
 
         NSAnimationContext.runAnimationGroup({ (context) -> Void in
             context.duration = duration - 0.05
@@ -156,6 +260,7 @@ class Window: NSWindow, NSWindowDelegate {
     func window(_ window: NSWindow, startCustomAnimationToExitFullScreenWithDuration duration: TimeInterval) {
         let newFrame = calculateWindowPosition(for: targetScreen!, withoutBounds: targetScreen == screen)
         let intermediateFrame = aspectFit(rect: newFrame, in: screen!.frame)
+        hideTitleBar()
         setFrame(intermediateFrame, display: true)
 
         NSAnimationContext.runAnimationGroup({ (context) -> Void in
@@ -169,6 +274,7 @@ class Window: NSWindow, NSWindowDelegate {
         cocoaCB.flagEvents(VO_EVENT_FULLSCREEN_STATE)
         cocoaCB.updateCusorVisibility()
         endAnimation(frame)
+        showTitleBar()
     }
 
     func windowDidExitFullScreen(_ notification: Notification) {
@@ -222,18 +328,6 @@ class Window: NSWindow, NSWindowDelegate {
         cocoaCB.layer.neededFlips += 1
     }
 
-    func setBorder(_ state: Bool) {
-        if styleMask.contains(.titled) != state {
-            if state {
-                styleMask.remove(.borderless)
-                styleMask.insert(.titled)
-            } else {
-                styleMask.remove(.titled)
-                styleMask.insert(.borderless)
-            }
-        }
-    }
-
     func setOnTop(_ state: Bool) {
         if state {
             let ontopLevel = mpv.getStringProperty("ontop-level") ?? "window"