Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/Display/Source/PortalSourceView.swift

@@ -0,0 +1,88 @@
+import UIKit
+
+open class PortalSourceView: UIView {
+    private final class PortalReference {
+        weak var portalView: PortalView?
+        
+        init(portalView: PortalView) {
+            self.portalView = portalView
+        }
+    }
+    
+    private var portalReferences: [PortalReference] = []
+    private weak var globalPortalView: GlobalPortalView?
+    
+    public final var needsGlobalPortal: Bool = false {
+        didSet {
+            if self.needsGlobalPortal != oldValue {
+                if self.needsGlobalPortal {
+                    self.alpha = 0.0
+                    
+                    if let windowHost = self.windowHost {
+                        windowHost.addGlobalPortalHostView(sourceView: self)
+                    }
+                } else {
+                    self.alpha = 1.0
+                    
+                    if let globalPortalView = self.globalPortalView {
+                        self.globalPortalView = nil
+                        
+                        globalPortalView.triggerWasRemoved()
+                    }
+                }
+            }
+        }
+    }
+    
+    deinit {
+        if let globalPortalView = self.globalPortalView {
+            globalPortalView.triggerWasRemoved()
+        }
+    }
+    
+    public func addPortal(view: PortalView) {
+        self.portalReferences.append(PortalReference(portalView: view))
+        if self.window != nil {
+            view.reloadPortal(sourceView: self)
+        }
+    }
+    
+    public func removePortal(view: PortalView) {
+        if let index = self.portalReferences.firstIndex(where: { $0.portalView === view }) {
+            self.portalReferences.remove(at: index)
+        }
+        view.disablePortal()
+    }
+    
+    func setGlobalPortal(view: GlobalPortalView?) {
+        if let globalPortalView = self.globalPortalView {
+            self.globalPortalView = nil
+            
+            globalPortalView.triggerWasRemoved()
+        }
+        
+        if let view = view {
+            self.globalPortalView = view
+            
+            if self.window != nil {
+                view.reloadPortal(sourceView: self)
+            }
+        }
+    }
+    
+    override open func didMoveToWindow() {
+        super.didMoveToWindow()
+        
+        if self.window != nil {
+            for portalReference in self.portalReferences {
+                if let portalView = portalReference.portalView {
+                    portalView.reloadPortal(sourceView: self)
+                }
+            }
+            
+            if self.needsGlobalPortal, self.globalPortalView == nil, let windowHost = self.windowHost {
+                windowHost.addGlobalPortalHostView(sourceView: self)
+            }
+        }
+    }
+}