Swiftgram/submodules/Display/Display/EditableTextNode.swift

import Foundation
import UIKit
import AsyncDisplayKit

public class EditableTextNode: ASEditableTextNode {
    override public var keyboardAppearance: UIKeyboardAppearance {
        get {
            return super.keyboardAppearance
        }
        set {
            guard newValue != self.keyboardAppearance else {
                return
            }
            super.keyboardAppearance = newValue
            self.textView.reloadInputViews()
        }
    }
}

public extension UITextView {
    var numberOfLines: Int {
        let layoutManager = self.layoutManager
        let numberOfGlyphs = layoutManager.numberOfGlyphs
        var lineRange: NSRange = NSMakeRange(0, 1)
        var index = 0
        var numberOfLines = 0
        
        while index < numberOfGlyphs {
            layoutManager.lineFragmentRect(forGlyphAt: index, effectiveRange: &lineRange)
            index = NSMaxRange(lineRange)
            numberOfLines += 1
        }
        return numberOfLines
    }
}