vector-im/element-ios/issues/5114 - Poll creation screen

- added input toolbar poll creation action.
- reordered input toolbar actions as per designs.
- added multiline text field and extracted common components.

RiotSwiftUI/Modules/Room/PollEditForm/View/PollEditForm.swift

@@ -0,0 +1,146 @@
+// File created from SimpleUserProfileExample
+// $ createScreen.sh Room/PollEditForm PollEditForm
+// 
+// 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 SwiftUI
+
+@available(iOS 14.0, *)
+struct PollEditForm: View {
+    
+    // MARK: - Properties
+    
+    // MARK: Private
+    
+    @Environment(\.theme) private var theme: ThemeSwiftUI
+    
+    // MARK: Public
+    
+    @ObservedObject var viewModel: PollEditFormViewModel.Context
+    
+    var body: some View {
+        NavigationView {
+            GeometryReader { proxy in
+                ScrollView {
+                    VStack(alignment: .leading, spacing: 32.0) {
+                        
+                        VStack(alignment: .leading, spacing: 16.0) {
+                            Text(VectorL10n.pollEditFormPollQuestionOrTopic)
+                                .font(theme.fonts.title3SB)
+                                .foregroundColor(theme.colors.primaryContent)
+                            
+                            VStack(alignment: .leading, spacing: 8.0) {
+                                Text(VectorL10n.pollEditFormQuestionOrTopic)
+                                    .font(theme.fonts.subheadline)
+                                    .foregroundColor(theme.colors.primaryContent)
+                                
+                                MultilineTextField(VectorL10n.pollEditFormInputPlaceholder, text: $viewModel.question.text)
+                            }
+                        }
+                        
+                        VStack(alignment: .leading, spacing: 16.0) {
+                            Text(VectorL10n.pollEditFormCreateOptions)
+                                .font(theme.fonts.title3SB)
+                                .foregroundColor(theme.colors.primaryContent)
+                            
+                            ForEach(0..<viewModel.answerOptions.count, id: \.self) { index in
+                                SafeBindingCollectionEnumerator($viewModel.answerOptions, index: index) { binding in
+                                    AnswerOptionGroup(text: binding.text, index: index) {
+                                        viewModel.send(viewAction: .deleteAnswerOption(viewModel.answerOptions[index]))
+                                    }
+                                }
+                            }
+                        }
+                        
+                        Button(VectorL10n.pollEditFormAddOption) {
+                            viewModel.send(viewAction: .addAnswerOption)
+                        }
+                        .disabled(!viewModel.viewState.addAnswerOptionButtonEnabled)
+                        
+                        Spacer()
+                        
+                        Button(VectorL10n.pollEditFormCreatePoll) {
+                            viewModel.send(viewAction: .create)
+                        }
+                        .buttonStyle(PrimaryActionButtonStyle(enabled: viewModel.viewState.confirmationButtonEnabled))
+                        .disabled(!viewModel.viewState.confirmationButtonEnabled)
+                    }
+                    .animation(.easeInOut(duration: 0.2))
+                    .padding()
+                    .frame(minHeight: proxy.size.height) // Make the VStack fill the ScrollView's parent
+                    .toolbar {
+                        ToolbarItem(placement: .navigationBarLeading) {
+                            Button(VectorL10n.cancel, action: {
+                                viewModel.send(viewAction: .cancel)
+                            })
+                        }
+                        ToolbarItem(placement: .principal) {
+                            Text(VectorL10n.pollEditFormCreatePoll)
+                                .font(.headline)
+                                .foregroundColor(theme.colors.primaryContent)
+                        }
+                    }
+                    .navigationBarTitleDisplayMode(.inline)
+                }
+            }
+        }
+        .accentColor(theme.colors.accent)
+    }
+}
+
+@available(iOS 14.0, *)
+private struct AnswerOptionGroup: View {
+    
+    @Environment(\.theme) private var theme: ThemeSwiftUI
+    
+    @State private var focused = false
+    
+    @Binding var text: String
+    
+    let index: Int
+    let onDelete: () -> Void
+    
+    var body: some View {
+        VStack(alignment: .leading, spacing: 8.0) {
+            Text(VectorL10n.pollEditFormOptionNumber(index + 1))
+                .font(theme.fonts.subheadline)
+                .foregroundColor(theme.colors.primaryContent)
+            
+            HStack(spacing: 16.0) {
+                TextField(VectorL10n.pollEditFormInputPlaceholder, text: $text, onEditingChanged: { edit in
+                    self.focused = edit
+                })
+                .textFieldStyle(BorderedInputFieldStyle(theme: _theme, isEditing: focused))
+                Button {
+                    onDelete()
+                } label: {
+                    Image(uiImage:Asset.Images.pollDeleteOptionIcon.image)
+                }
+                .accessibilityIdentifier("Delete answer option")
+            }
+        }
+    }
+}
+
+// MARK: - Previews
+
+@available(iOS 14.0, *)
+struct PollEditForm_Previews: PreviewProvider {
+    static let stateRenderer = MockPollEditFormScreenState.stateRenderer
+    static var previews: some View {
+        stateRenderer.screenGroup()
+    }
+}