add simple formatting and maximise support for replacement toolbar

Riot/Modules/Room/Views/WYSIWYGInputToolbar/WysiwygInputToolbarView.swift

@@ -0,0 +1,119 @@
+// 
+// Copyright 2022 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 Foundation
+import Reusable
+import WysiwygComposer
+import SwiftUI
+import Combine
+import UIKit
+import CoreGraphics
+
+@available(iOS 15.0, *)
+class WysiwygInputToolbarView: MXKRoomInputToolbarView, NibLoadable, RoomInputToolbarViewProtocol {
+    
+    override class func instantiate() -> MXKRoomInputToolbarView! {
+        return loadFromNib()
+    }
+    
+    private weak var toolbarViewDelegate: RoomInputToolbarViewDelegate? {
+        return (delegate as? RoomInputToolbarViewDelegate) ?? nil
+    }
+    
+    private var cancellables = Set<AnyCancellable>()
+    private var heightConstraint: NSLayoutConstraint!
+    private var hostingViewController: UIHostingController<Composer>!
+    private static let minToolbarHeight: CGFloat = 100
+    
+    override func awakeFromNib() {
+        super.awakeFromNib()
+        
+        let viewModel = WysiwygComposerViewModel()
+//        let composerViewModel = ComposerViewModel()
+        let composer = Composer(viewModel: viewModel)
+        
+        
+        hostingViewController = UIHostingController(rootView: composer)
+        //            hostingViewController.view.sizeToFit()
+        //            let h = hostingViewController.view.frame.size.height
+        
+        let h = hostingViewController.sizeThatFits(in: CGSize(width: self.frame.width, height: 800)).height
+        //            hostingViewController.view.invalidateIntrinsicContentSize()
+        
+        let subView: UIView = hostingViewController.view
+        
+        //            vc_addSubViewMatchingParent(subView)
+        
+        self.addSubview(subView)
+        
+        hostingViewController.view.translatesAutoresizingMaskIntoConstraints = false
+        subView.translatesAutoresizingMaskIntoConstraints = false
+        heightConstraint = subView.heightAnchor.constraint(equalToConstant: h)
+        NSLayoutConstraint.activate([
+            heightConstraint,
+            subView.leadingAnchor.constraint(equalTo: self.leadingAnchor),
+            //                subView.topAnchor.constraint(equalTo: self.topAnchor),
+            subView.trailingAnchor.constraint(equalTo: self.trailingAnchor),
+            subView.bottomAnchor.constraint(equalTo: self.bottomAnchor)
+        ])
+        //            self.setNeedsLayout()
+        //            self.layoutIfNeeded()
+        
+        //            composerViewModel.$totalHeight
+        //                .removeDuplicates()
+        //                .sink { [weak self] height in
+        //                    guard let self = self else { return }
+        //                    hostingViewController.view.sizeToFit()
+        //                    let h = hostingViewController.view.frame.height
+        //                    self.updateToolbarHeight(wysiwygHeight: height)
+        //                }.store(in: &cancellables)
+        //        // Subscribe to relevant events and map them to UIKit-style delegate.
+        cancellables = [
+//            viewModel.$isContentEmpty
+//                .removeDuplicates()
+//                .sink(receiveValue: { [weak self] isContentEmpty in
+//                    //                    guard let self = self else { return }
+//                    //                    self.delegate?.isContentEmptyDidChange(isContentEmpty)
+//                }),
+            viewModel.$idealHeight
+                .removeDuplicates()
+                .sink(receiveValue: { [weak self] idealHeight in
+                    guard let self = self else { return }
+                    let h = self.hostingViewController.sizeThatFits(in: CGSize(width: self.frame.width, height: 800)).height
+                    self.updateToolbarHeight(wysiwygHeight: h)
+                    //                    self.delegate?.idealHeightDidChange(idealHeight)
+                })
+        ]
+        
+        
+    }
+    
+    func setVoiceMessageToolbarView(_ voiceMessageToolbarView: UIView!) {
+        
+    }
+    
+    func toolbarHeight() -> CGFloat {
+        return heightConstraint.constant
+    }
+    
+    
+    func updateToolbarHeight(wysiwygHeight: CGFloat) {
+        heightConstraint.constant = wysiwygHeight
+        toolbarViewDelegate?.roomInputToolbarView?(self, heightDidChanged: wysiwygHeight, completion: { _ in
+            
+        })
+    }
+}