NSRange TextKit2 helpers

NSRange+NSTextContentManager.swift

extension NSRange {

    static let notFound = NSRange(location: NSNotFound, length: 0)

    var isEmpty: Bool {
        length == 0
    }

    init(_ textRange: NSTextRange, in textContentManager: NSTextContentManager) {
        let offset = textContentManager.offset(from: textContentManager.documentRange.location, to: textRange.location)
        let length = textContentManager.offset(from: textRange.location, to: textRange.endLocation)
        self.init(location: offset, length: length)
    }

    init(_ textLocation: NSTextLocation, in textContentManager: NSTextContentManager) {
        let offset = textContentManager.offset(from: textContentManager.documentRange.location, to: textLocation)
        self.init(location: offset, length: 0)
    }

}