element-x-ios/DesignKit/Sources/TextFields/ElementTextFieldStyle.swift

101 lines
3.6 KiB
Swift

//
// 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 DesignTokens
import SwiftUI
@available(iOS 15.0, *)
public extension TextFieldStyle where Self == ElementTextFieldStyle {
static func elementInput(labelText: String? = nil,
footerText: String? = nil,
isError: Bool = false) -> ElementTextFieldStyle {
ElementTextFieldStyle(labelText: labelText, footerText: footerText, isError: isError)
}
}
@available(iOS 15.0, *)
public struct ElementTextFieldStyle: TextFieldStyle {
@Environment(\.isEnabled) private var isEnabled
@Environment(\.colorScheme) private var colorScheme
@FocusState private var isFocused: Bool
public let labelText: String?
public let footerText: String?
public let isError: Bool
private var labelColor: Color {
guard colorScheme == .light else { return .element.tertiaryContent }
return isEnabled ? .element.primaryContent : .element.quaternaryContent
}
private var footerColor: Color {
isError ? .element.alert : .element.tertiaryContent
}
public init(labelText: String? = nil, footerText: String? = nil, isError: Bool = false) {
self.labelText = labelText
self.footerText = footerText
self.isError = isError
}
public func _body(configuration: TextField<_Label>) -> some View {
VStack(alignment: .leading, spacing: 8) {
if let labelText = labelText {
Text(labelText)
.font(.element.subheadline)
.foregroundColor(labelColor)
}
configuration
.textFieldStyle(BorderedInputFieldStyle(isEditing: isFocused, isError: isError, returnKey: nil))
.focused($isFocused)
if let footerText = footerText {
Text(footerText)
.font(.element.footnote)
.foregroundColor(footerColor)
}
}
}
}
@available(iOS 15.0, *)
struct ElementTextFieldStyle_Previews: PreviewProvider {
public static var states: some View {
VStack(spacing: 12) {
TextField("Placeholder", text: .constant(""))
.textFieldStyle(.elementInput(labelText: "Label", footerText: "Footer"))
TextField("Placeholder", text: .constant("Input text"))
.textFieldStyle(.elementInput(labelText: "Title", footerText: "Footer"))
TextField("Placeholder", text: .constant("Bad text"))
.textFieldStyle(.elementInput(labelText: "Title", footerText: "Footer", isError: true))
TextField("Placeholder", text: .constant(""))
.textFieldStyle(.elementInput(labelText: "Title", footerText: "Footer"))
.disabled(true)
}
.padding()
}
public static var previews: some View {
Group {
states
.preferredColorScheme(.light)
states
.preferredColorScheme(.dark)
}
}
}