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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2024 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
//
//===----------------------------------------------------------------------===//
import Foundation
import SwiftSyntax
/// The selection as given on the command line - an array of offets and lengths
public enum Selection {
case infinite
case ranges([Range<AbsolutePosition>])
/// Create a selection from an array of utf8 ranges. An empty array means an infinite selection.
public init(offsetRanges: [Range<Int>]) {
if offsetRanges.isEmpty {
self = .infinite
} else {
let ranges = offsetRanges.map {
AbsolutePosition(utf8Offset: $0.lowerBound) ..< AbsolutePosition(utf8Offset: $0.upperBound)
}
self = .ranges(ranges)
}
}
public func contains(_ position: AbsolutePosition) -> Bool {
switch self {
case .infinite:
return true
case .ranges(let ranges):
return ranges.contains { $0.contains(position) }
}
}
public func overlapsOrTouches(_ range: Range<AbsolutePosition>) -> Bool {
switch self {
case .infinite:
return true
case .ranges(let ranges):
return ranges.contains { $0.overlapsOrTouches(range) }
}
}
}
extension Range<AbsolutePosition> {
// Returns `true` if the intersection between this range and `other` is non-empty or if the two ranges are directly
/// adjacent to each other.
public func overlapsOrTouches(_ other: Range<AbsolutePosition>) -> Bool {
return self.upperBound >= other.lowerBound && self.lowerBound <= other.upperBound
}
}
public extension Syntax {
/// - Returns: `true` if the node is _completely_ inside any range in the selection
func isInsideSelection(_ selection: Selection) -> Bool {
switch selection {
case .infinite:
return true
case .ranges(let ranges):
return ranges.contains { return $0.lowerBound <= position && endPosition <= $0.upperBound }
}
}
}
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