Switching composer between text mode & action mode

Riot/Modules/Room/Views/InputToolbar/RoomActionsBar.swift

@@ -0,0 +1,129 @@
+// 
+// Copyright 2021 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import UIKit
+
+@objcMembers
+@objc class RoomActionsBar: UIScrollView {
+    // MARK: - Properties
+    
+    var itemSpacing: CGFloat = 20 {
+        didSet {
+            self.setNeedsLayout()
+        }
+    }
+    
+    var actionItems: Array<RoomActionItem> = [] {
+        didSet {
+            var actionButtons: Array<UIButton> = []
+            for (index, item) in actionItems.enumerated() {
+                let button = UIButton(type: .custom)
+                button.setImage(item.image, for: .normal)
+                button.addTarget(self, action: #selector(buttonAction(_:)), for: .touchUpInside)
+                button.tintColor = ThemeService.shared().theme.tintColor
+                button.tag = index
+                actionButtons.append(button)
+                addSubview(button)
+            }
+            self.actionButtons = actionButtons
+            self.lastBounds = .zero
+            self.setNeedsLayout()
+        }
+    }
+    
+    private var actionButtons: Array<UIButton> = [] {
+        willSet {
+            for button in actionButtons {
+                button.removeFromSuperview()
+            }
+        }
+    }
+    
+    private var lastBounds = CGRect.zero
+    
+    // MARK: - Lifecycle
+    
+    override init(frame: CGRect) {
+        super.init(frame: frame)
+        self.showsHorizontalScrollIndicator = false
+    }
+
+    required init?(coder: NSCoder) {
+        super.init(coder: coder)
+        self.showsHorizontalScrollIndicator = false
+    }
+    
+    override func layoutSubviews() {
+        super.layoutSubviews()
+
+        guard lastBounds != self.bounds else {
+            return
+        }
+
+        lastBounds = self.bounds
+
+        var currentX: CGFloat = 0
+        for button in actionButtons {
+            button.frame = CGRect(x: currentX, y: 0, width: self.bounds.height, height: self.bounds.height)
+            currentX = button.frame.maxX + itemSpacing
+        }
+
+        self.contentSize = CGSize(width: currentX - itemSpacing, height: self.bounds.height)
+    }
+    
+    // MARK: - Business methods
+    
+    func customizeViewRendering() {
+        for button in actionButtons {
+            button.tintColor = ThemeService.shared().theme.tintColor
+        }
+    }
+    
+    func animate(showIn: Bool, completion: ((Bool) -> Void)? = nil) {
+        if showIn {
+            for button in actionButtons {
+                button.transform = CGAffineTransform(translationX: 0, y: self.bounds.height)
+            }
+            for (index, button) in actionButtons.enumerated() {
+                UIView.animate(withDuration: 0.32, delay: 0.05 * Double(index), usingSpringWithDamping: 0.5, initialSpringVelocity: 7, options: .curveEaseInOut) {
+                    button.transform = CGAffineTransform.identity
+                } completion: { (finished) in
+                    completion?(finished)
+                }
+            }
+        } else {
+            for (index, button) in actionButtons.enumerated() {
+                UIView.animate(withDuration: 0.2, delay: 0.05 * Double(index), options: .curveEaseInOut) {
+                    button.transform = CGAffineTransform(translationX: 0, y: self.bounds.height)
+                } completion: { (finished) in
+                    completion?(finished)
+                }
+            }
+        }
+    }
+    
+    // MARK: - Private methods
+    
+    @objc private func buttonAction(_ sender: UIButton) {
+        if let action = actionItems[sender.tag].action {
+            action()
+        }
+    }
+    
+    private func setupView() {
+        self.showsHorizontalScrollIndicator = false
+    }
+}