Moved ViewHolder methods to ViewHolder class

app/src/main/java/com/paktalin/vocabularynotebook/ViewHolder.kt

 package com.paktalin.vocabularynotebook
 
 import android.support.v7.widget.RecyclerView
+import android.text.Editable
+import android.text.TextWatcher
+import android.util.Log
 import android.view.View
 import android.widget.EditText
 import android.widget.ImageButton
@@ -11,4 +14,34 @@ class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
     val etTranslation: EditText = itemView.findViewById(R.id.etTranslation)
     val btnPopupMenu: ImageButton = itemView.findViewById(R.id.btnContextMenu)
     val layout: LinearLayout = itemView.findViewById(R.id.tableLayout)
+
+
+    fun showEmptyItem() {
+        btnPopupMenu.isClickable = false
+        btnPopupMenu.visibility = View.INVISIBLE
+        Utils.setEmptyEditText(etWord, "new word")
+        Utils.setEmptyEditText(etTranslation, "translation")
+
+        etWord.addTextChangedListener(object : TextWatcher {
+            override fun beforeTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) { }
+            override fun onTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) { }
+            override fun afterTextChanged(editable: Editable) {
+                if (!etWord.text.isEmpty()) showCancelButton() }
+        })
+        this.etTranslation.addTextChangedListener(object : TextWatcher {
+            override fun beforeTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) { }
+            override fun onTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) { }
+            override fun afterTextChanged(editable: Editable) {
+                if (!etTranslation.text.isEmpty()) showCancelButton() }
+        })
+    }
+
+    private fun showCancelButton() {
+        Log.d(TAG, "empty word is focused")
+        btnPopupMenu.setImageResource(R.drawable.ic_cancel_icon)
+        btnPopupMenu.visibility = View.VISIBLE
+        //todo add button click listener
+    }
+
+    companion object { private val TAG = "VN/" + ViewHolder::class.java.simpleName }
 }
\ No newline at end of file

app/src/main/java/com/paktalin/vocabularynotebook/VocabularyAdapter.kt

@@ -4,9 +4,6 @@ import android.app.Activity
 import android.content.Intent
 import android.support.v7.widget.PopupMenu
 import android.support.v7.widget.RecyclerView
-import android.text.Editable
-import android.text.TextWatcher
-import android.util.Log
 import android.view.*
 import com.paktalin.vocabularynotebook.activities.WordItemInfoActivity
 
@@ -26,7 +23,7 @@ class VocabularyAdapter(private val wordItems: MutableList<WordItem>, private va
     }
 
     override fun onBindViewHolder(holder: ViewHolder, position: Int) {
-        if (position == 0) showEmptyItem(holder)
+        if (position == 0) holder.showEmptyItem()
         else {
             val wordItem = wordItems[position]
             holder.etWord.setText(wordItem.pojo!!.word)
@@ -68,32 +65,6 @@ class VocabularyAdapter(private val wordItems: MutableList<WordItem>, private va
         this.notifyItemRangeChanged(position, wordItems.size)
     }
 
-    private fun showEmptyItem(holder: ViewHolder) {
-        holder.btnPopupMenu.isClickable = false
-        holder.btnPopupMenu.visibility = View.INVISIBLE
-        Utils.setEmptyEditText(holder.etWord, "new word")
-        Utils.setEmptyEditText(holder.etTranslation, "translation")
-
-        holder.etWord.addTextChangedListener(object : TextWatcher {
-            override fun beforeTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) { }
-            override fun onTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) { }
-            override fun afterTextChanged(editable: Editable) {
-                if (!holder.etWord.text.isEmpty()) showCancelButton(holder) }
-        })
-        holder.etTranslation.addTextChangedListener(object : TextWatcher {
-            override fun beforeTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) { }
-            override fun onTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) { }
-            override fun afterTextChanged(editable: Editable) {
-                if (!holder.etTranslation.text.isEmpty()) showCancelButton(holder) }
-        })
-    }
-
-    private fun showCancelButton(holder: ViewHolder) {
-        Log.d(TAG, "empty word is focused")
-        holder.btnPopupMenu.setImageResource(R.drawable.ic_cancel_icon)
-        holder.btnPopupMenu.visibility = View.VISIBLE
-    }
-
     companion object { private val TAG = "VN/" + VocabularyAdapter::class.java.simpleName }
 
     init { wordItems.add(0, WordItem.createEmpty()) }