func colorInformation()

in Sources/SourceKitLSP/Swift/SwiftLanguageServer.swift [769:815]
47 lines of code
6 McCabe index (conditional complexity)

        func colorInformation(dict: SKDResponseDictionary) -> ColorInformation? {
          guard let kind: sourcekitd_uid_t = dict[self.keys.kind],
                kind == self.values.expr_object_literal,
                let name: String = dict[self.keys.name],
                name == "colorLiteral",
                let offset: Int = dict[self.keys.offset],
                let start: Position = snapshot.positionOf(utf8Offset: offset),
                let length: Int = dict[self.keys.length],
                let end: Position = snapshot.positionOf(utf8Offset: offset + length),
                let substructure: SKDResponseArray = dict[self.keys.substructure] else {
            return nil
          }
          var red, green, blue, alpha: Double?
          substructure.forEach{ (i: Int, value: SKDResponseDictionary) in
            guard let name: String = value[self.keys.name],
                  let bodyoffset: Int = value[self.keys.bodyoffset],
                  let bodylength: Int = value[self.keys.bodylength] else {
              return true
            }
            let view = snapshot.text.utf8
            let bodyStart = view.index(view.startIndex, offsetBy: bodyoffset)
            let bodyEnd = view.index(view.startIndex, offsetBy: bodyoffset+bodylength)
            let value = String(view[bodyStart..<bodyEnd]).flatMap(Double.init)
            switch name {
              case "red":
                red = value
              case "green":
                green = value
              case "blue":
                blue = value
              case "alpha":
                alpha = value
              default:
                break
            }
            return true
          }
          if let red = red,
             let green = green,
             let blue = blue,
             let alpha = alpha {
            let color = Color(red: red, green: green, blue: blue, alpha: alpha)
            return ColorInformation(range: start..<end, color: color)
          } else {
            return nil
          }
        }