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/*
This source file is part of the Swift.org open source project
Copyright (c) 2021 Apple Inc. and the Swift project authors
Licensed under Apache License v2.0 with Runtime Library Exception
See https://swift.org/LICENSE.txt for license information
See https://swift.org/CONTRIBUTORS.txt for Swift project authors
*/
/// An ordered list.
public struct OrderedList: ListItemContainer, BlockMarkup {
public var _data: _MarkupData
init(_ raw: RawMarkup) throws {
guard case .orderedList = raw.data else {
throw RawMarkup.Error.concreteConversionError(from: raw, to: OrderedList.self)
}
let absoluteRaw = AbsoluteRawMarkup(markup: raw, metadata: MarkupMetadata(id: .newRoot(), indexInParent: 0))
self.init(_MarkupData(absoluteRaw))
}
init(_ data: _MarkupData) {
self._data = data
}
}
// MARK: - Public API
public extension OrderedList {
// MARK: ListItemContainer
init<Items: Sequence>(_ items: Items) where Items.Element == ListItem {
try! self.init(.orderedList(parsedRange: nil, items.map { $0.raw.markup }))
}
/// The starting index for the list.
///
/// The default starting index in CommonMark is 1. In this case, clients may use the default
/// ordered-list start index of their desired rendering format. For example, when rendering to
/// HTML, clients may omit the `start` attribute of the rendered list when this returns 1.
var startIndex: UInt {
get {
guard case let .orderedList(start) = _data.raw.markup.data else {
fatalError("\(self) markup wrapped unexpected \(_data.raw)")
}
return start
}
set {
guard startIndex != newValue else {
return
}
_data = _data.replacingSelf(.orderedList(parsedRange: nil, _data.raw.markup.copyChildren(), startIndex: newValue))
}
}
// MARK: Visitation
func accept<V: MarkupVisitor>(_ visitor: inout V) -> V.Result {
return visitor.visitOrderedList(self)
}
}
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