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TelegramUI/SearchDisplayController.swift

@@ -0,0 +1,70 @@
+import Foundation
+import AsyncDisplayKit
+import SwiftSignalKit
+import Display
+
+final class SearchDisplayController {
+    private let searchBar: SearchBarNode
+    private let contentNode: SearchDisplayControllerContentNode
+    
+    private var containerLayout: (ContainerViewLayout, CGFloat)?
+    
+    init(contentNode: SearchDisplayControllerContentNode, cancel: @escaping () -> Void) {
+        self.searchBar = SearchBarNode()
+        self.contentNode = contentNode
+        
+        self.searchBar.textUpdated = { [weak contentNode] text in
+            contentNode?.searchTextUpdated(text: text)
+        }
+        self.searchBar.cancel = cancel
+    }
+    
+    func containerLayoutUpdated(_ layout: ContainerViewLayout, navigationBarHeight: CGFloat, transition: ContainedViewLayoutTransition) {
+        let searchBarFrame = CGRect(origin: CGPoint(x: 0.0, y: (layout.statusBarHeight ?? 0.0) - 20.0), size: CGSize(width: layout.size.width, height: 64.0))
+        transition.updateFrame(node: self.searchBar, frame: searchBarFrame)
+        
+        self.containerLayout = (layout, searchBarFrame.maxY)
+        
+        transition.updateFrame(node: self.contentNode, frame: CGRect(origin: CGPoint(), size: layout.size))
+        self.contentNode.containerLayoutUpdated(ContainerViewLayout(size: layout.size, intrinsicInsets: layout.intrinsicInsets, statusBarHeight: nil, inputHeight: layout.inputHeight), navigationBarHeight: searchBarFrame.maxY, transition: transition)
+    }
+    
+    func activate(insertSubnode: (ASDisplayNode) -> Void, placeholder: SearchBarPlaceholderNode) {
+        guard let (layout, navigationBarHeight) = self.containerLayout else {
+            return
+        }
+        
+        insertSubnode(self.contentNode)
+        
+        self.contentNode.frame = CGRect(origin: CGPoint(), size: layout.size)
+        self.contentNode.containerLayoutUpdated(ContainerViewLayout(size: layout.size, intrinsicInsets: UIEdgeInsets(), statusBarHeight: nil, inputHeight: nil), navigationBarHeight: navigationBarHeight, transition: .immediate)
+        
+        let initialTextBackgroundFrame = placeholder.convert(placeholder.backgroundNode.frame, to: self.contentNode.supernode)
+        
+        let contentNodePosition = self.contentNode.layer.position
+        self.contentNode.layer.animatePosition(from: CGPoint(x: contentNodePosition.x, y: contentNodePosition.y + (initialTextBackgroundFrame.maxY + 8.0 - navigationBarHeight)), to: contentNodePosition, duration: 0.5, timingFunction: kCAMediaTimingFunctionSpring)
+        self.contentNode.layer.animateAlpha(from: 0.0, to: 1.0, duration: 0.3, timingFunction: kCAMediaTimingFunctionEaseOut)
+        
+        self.searchBar.placeholderString = placeholder.placeholderString
+        self.searchBar.frame = CGRect(origin: CGPoint(x: 0.0, y: (layout.statusBarHeight ?? 0.0) - 20.0), size: CGSize(width: layout.size.width, height: 64.0))
+        insertSubnode(searchBar)
+        self.searchBar.layout()
+        
+        self.searchBar.activate()
+        self.searchBar.animateIn(from: placeholder, duration: 0.5, timingFunction: kCAMediaTimingFunctionSpring)
+    }
+    
+    func deactivate(placeholder: SearchBarPlaceholderNode?) {
+        searchBar.deactivate()
+        
+        if let placeholder = placeholder {
+            searchBar.animateOut(to: placeholder, duration: 0.5, timingFunction: kCAMediaTimingFunctionSpring, completion: {
+                self.searchBar.removeFromSupernode()
+            })
+        }
+        
+        self.contentNode.layer.animateAlpha(from: 1.0, to: 0.0, duration: 0.3, removeOnCompletion: false, completion: { _ in
+            self.contentNode.removeFromSupernode()
+        })
+    }
+}