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import Foundation
import WebKit

typealias ClosureType =  @convention(c) (Any, Selector, UnsafeRawPointer, Bool, Bool, Any) -> Void

extension WKWebView{
    var keyboardDisplayRequiresUserAction: Bool? {
        get {
            return self.keyboardDisplayRequiresUserAction
        }
        set {
            self.setKeyboardRequiresUserInteraction(newValue ?? true)
        }
    }
    
    func setKeyboardRequiresUserInteraction( _ value: Bool) {
        let sel: Selector = sel_getUid("_startAssistingNode:userIsInteracting:blurPreviousNode:userObject:")
        let WKContentView: AnyClass = NSClassFromString("WKContentView")!
        let method = class_getInstanceMethod(WKContentView, sel)
        let originalImp: IMP = method_getImplementation(method)
        let original: ClosureType = unsafeBitCast(originalImp, to: ClosureType.self)
        let block : @convention(block) (Any, UnsafeRawPointer, Bool, Bool, Any) -> Void = { (me, arg0, arg1, arg2, arg3) in
            original(me, sel, arg0, !value, arg2, arg3)
        }
        let imp: IMP = imp_implementationWithBlock(block)
        method_setImplementation(method, imp)
    }
}