import Cocoa

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {

  @IBOutlet weak var window    : NSWindow!
  @IBOutlet weak var tableView : NSTableView!

  func applicationDidFinishLaunching(_ aNotification: Notification) {
    tableView.delegate   = self
    tableView.dataSource = self

    tableView.allowsEmptySelection    = true
    tableView.allowsColumnResizing    = false
    tableView.allowsMultipleSelection = false
    tableView.allowsColumnSelection   = false
    tableView.gridStyleMask = []
    tableView.gridColor     = .clear

    // This is required to make the labels selectable!
    tableView.selectionHighlightStyle = .none

    tableView.columnAutoresizingStyle = .firstColumnOnlyAutoresizingStyle

    let tc = tableView.tableColumns[0]
    tc.isEditable   = false
    tc.resizingMask = .autoresizingMask
  }
}

let viewID = NSUserInterfaceItemIdentifier(rawValue: "run-view")

final class MyTextField : NSTextField {
  #if false
  override func draw(_ dirtyRect: NSRect) {
    // Just doing this makes it work
    super.draw(dirtyRect)
  }
  #endif
}

extension AppDelegate : NSTableViewDelegate {

  func tableView(_ tableView: NSTableView, heightOfRow row: Int) -> CGFloat {
    return 32
  }

  func tableView(_ tv: NSTableView, viewFor tc: NSTableColumn?, row: Int)
       -> NSView?
  {
    let v = (tv.makeView(withIdentifier: viewID, owner: nil) as? NSTextField)
        ?? MyTextField()
    v.isSelectable = false
    v.isEditable   = false
    v.stringValue  = data[row]
    v.identifier   = viewID
    return v
  }

  func tableView(_ tableView: NSTableView, pasteboardWriterForRow row: Int)
       -> NSPasteboardWriting?
  {
    return MyPasteboardItem(value: data[row])
  }
}

final class MyPasteboardItem : NSObject, NSPasteboardWriting {

  let value : String

  init(value: String) { self.value = value }

  func writableTypes(for pasteboard: NSPasteboard) -> [NSPasteboard.PasteboardType] {
    return [ .myOwnType, .string ]
  }

  func pasteboardPropertyList(forType type: NSPasteboard.PasteboardType) -> Any? {
    switch type {
      case .string:    return value
      case .myOwnType: return [ "value": value ]
      default:         return nil
    }
  }
}

extension NSPasteboard.PasteboardType {
  static let myOwnType =
    NSPasteboard.PasteboardType(rawValue: "de.zeezide.own-type")
}

extension AppDelegate : NSTableViewDataSource {
  func numberOfRows(in tableView: NSTableView) -> Int { return data.count }
}

fileprivate let data = [
  "Hello",
  "World",
  "Blub"
]