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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
//
//===----------------------------------------------------------------------===//
/// A textual edit to the original source represented by a range and a
/// replacement.
public struct SourceEdit: Equatable, Sendable {
/// The half-open range that this edit applies to.
public let range: Range<AbsolutePosition>
/// The text to replace the original range with. Empty for a deletion.
public let replacement: String
/// Length of the original source range that this edit applies to. Zero if
/// this is an addition.
public var length: SourceLength {
return SourceLength(utf8Length: range.upperBound.utf8Offset - range.lowerBound.utf8Offset)
}
/// Create an edit to replace `range` in the original source with
/// `replacement`.
public init(range: Range<AbsolutePosition>, replacement: String) {
self.range = range
self.replacement = replacement
}
/// Convenience function to create a textual addition after the given node
/// and its trivia.
public static func insert(_ newText: String, after node: some SyntaxProtocol) -> SourceEdit {
return SourceEdit(range: node.endPosition..<node.endPosition, replacement: newText)
}
/// Convenience function to create a textual addition before the given node
/// and its trivia.
public static func insert(_ newText: String, before node: some SyntaxProtocol) -> SourceEdit {
return SourceEdit(range: node.position..<node.position, replacement: newText)
}
/// Convenience function to create a textual replacement of the given node,
/// including its trivia.
public static func replace(_ node: some SyntaxProtocol, with replacement: String) -> SourceEdit {
return SourceEdit(range: node.position..<node.endPosition, replacement: replacement)
}
/// Convenience function to create a textual deletion the given node and its
/// trivia.
public static func remove(_ node: some SyntaxProtocol) -> SourceEdit {
return SourceEdit(range: node.position..<node.endPosition, replacement: "")
}
}
extension SourceEdit: CustomDebugStringConvertible {
public var debugDescription: String {
let hasNewline = replacement.contains { $0.isNewline }
if hasNewline {
return #"""
\#(range.lowerBound.utf8Offset)-\#(range.upperBound.utf8Offset)
"""
\#(replacement)
"""
"""#
}
return "\(range.lowerBound.utf8Offset)-\(range.upperBound.utf8Offset) \"\(replacement)\""
}
}
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