Tokamak/Sources/TokamakDOM/Views/DynamicHTML.swift

108 lines
2.7 KiB
Swift

// Copyright 2020 Tokamak contributors
//
// 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.
//
// Created by Carson Katri on 7/31/20.
//
import JavaScriptKit
import TokamakCore
@_spi(TokamakStaticHTML)
import TokamakStaticHTML
public typealias HTML = TokamakStaticHTML.HTML
public typealias Listener = (JSObject) -> ()
protocol AnyDynamicHTML: AnyHTML {
var listeners: [String: Listener] { get }
}
public struct DynamicHTML<Content>: View, AnyDynamicHTML {
public let tag: String
public let attributes: [HTMLAttribute: String]
public let listeners: [String: Listener]
let content: Content
let visitContent: (ViewVisitor) -> ()
fileprivate let cachedInnerHTML: String?
public func innerHTML(shouldSortAttributes: Bool) -> String? {
cachedInnerHTML
}
@_spi(TokamakCore)
public var body: Never {
neverBody("HTML")
}
public func _visitChildren<V>(_ visitor: V) where V: ViewVisitor {
visitContent(visitor)
}
}
public extension DynamicHTML where Content: StringProtocol {
init(
_ tag: String,
_ attributes: [HTMLAttribute: String] = [:],
listeners: [String: Listener] = [:],
content: Content
) {
self.tag = tag
self.attributes = attributes
self.listeners = listeners
self.content = content
cachedInnerHTML = String(content)
visitContent = { _ in }
}
}
extension DynamicHTML: ParentView where Content: View {
public init(
_ tag: String,
_ attributes: [HTMLAttribute: String] = [:],
listeners: [String: Listener] = [:],
@ViewBuilder content: @escaping () -> Content
) {
self.tag = tag
self.attributes = attributes
self.listeners = listeners
self.content = content()
cachedInnerHTML = nil
visitContent = { $0.visit(content()) }
}
@_spi(TokamakCore)
public var children: [AnyView] {
[AnyView(content)]
}
}
public extension DynamicHTML where Content == EmptyView {
init(
_ tag: String,
_ attributes: [HTMLAttribute: String] = [:],
listeners: [String: Listener] = [:]
) {
self = DynamicHTML(tag, attributes, listeners: listeners) { EmptyView() }
}
}
@_spi(TokamakStaticHTML)
extension DynamicHTML: HTMLConvertible {
public func attributes(useDynamicLayout: Bool) -> [HTMLAttribute: String] {
attributes
}
}