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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2023 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 the list of Swift project authors
//
//===----------------------------------------------------------------------===//
struct AbsoluteRawSyntax: Sendable {
let raw: RawSyntax
let info: AbsoluteSyntaxInfo
/// Returns first `present` child.
func firstChild(viewMode: SyntaxTreeViewMode) -> AbsoluteRawSyntax? {
guard let layoutView = raw.layoutView else { return nil }
var curInfo = info.advancedToFirstChild()
for childOpt in layoutView.children {
if let child = childOpt, viewMode.shouldTraverse(node: child) {
return AbsoluteRawSyntax(raw: child, info: curInfo)
}
curInfo = curInfo.advancedBySibling(childOpt)
}
return nil
}
/// Returns next `present` sibling.
func nextSibling(parent: AbsoluteRawSyntax, viewMode: SyntaxTreeViewMode) -> AbsoluteRawSyntax? {
var curInfo = info.advancedBySibling(raw)
for siblingOpt in parent.raw.layoutView!.children.dropFirst(Int(info.indexInParent + 1)) {
if let sibling = siblingOpt, viewMode.shouldTraverse(node: sibling) {
return AbsoluteRawSyntax(raw: sibling, info: curInfo)
}
curInfo = curInfo.advancedBySibling(siblingOpt)
}
return nil
}
func replacingSelf(_ newRaw: RawSyntax, newRootId: UInt) -> AbsoluteRawSyntax {
let nodeId = SyntaxIdentifier(rootId: newRootId, indexInTree: info.nodeId.indexInTree)
let newInfo = AbsoluteSyntaxInfo(position: info.position, nodeId: nodeId)
return .init(raw: newRaw, info: newInfo)
}
}
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