migrating to ViewBinding part 4: Adapters (#2095)

app/src/main/java/com/keylesspalace/tusky/components/compose/dialog/AddPollDialog.kt

@@ -22,7 +22,6 @@ import android.view.LayoutInflater
 import android.view.WindowManager
 import androidx.appcompat.app.AlertDialog
 import com.keylesspalace.tusky.R
-import com.keylesspalace.tusky.adapter.AddPollOptionsAdapter
 import com.keylesspalace.tusky.databinding.DialogAddPollBinding
 import com.keylesspalace.tusky.entity.NewPoll
 

app/src/main/java/com/keylesspalace/tusky/components/compose/dialog/AddPollOptionsAdapter.kt

@@ -0,0 +1,84 @@
+/* Copyright 2019 Tusky Contributors
+ *
+ * This file is a part of Tusky.
+ *
+ * This program is free software; you can redistribute it and/or modify it under the terms of the
+ * GNU General Public License as published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Tusky; if not,
+ * see <http://www.gnu.org/licenses>. */
+
+package com.keylesspalace.tusky.components.compose.dialog
+
+import android.text.InputFilter
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import com.keylesspalace.tusky.R
+import com.keylesspalace.tusky.databinding.ItemAddPollOptionBinding
+import com.keylesspalace.tusky.util.BindingHolder
+import com.keylesspalace.tusky.util.onTextChanged
+import com.keylesspalace.tusky.util.visible
+
+class AddPollOptionsAdapter(
+        private var options: MutableList<String>,
+        private val maxOptionLength: Int,
+        private val onOptionRemoved: (Boolean) -> Unit,
+        private val onOptionChanged: (Boolean) -> Unit
+): RecyclerView.Adapter<BindingHolder<ItemAddPollOptionBinding>>() {
+
+    val pollOptions: List<String>
+        get() = options.toList()
+
+    fun addChoice() {
+        options.add("")
+        notifyItemInserted(options.size - 1)
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): BindingHolder<ItemAddPollOptionBinding> {
+        val binding = ItemAddPollOptionBinding.inflate(LayoutInflater.from(parent.context), parent, false)
+        val holder = BindingHolder(binding)
+        binding.optionEditText.filters = arrayOf(InputFilter.LengthFilter(maxOptionLength))
+
+        binding.optionEditText.onTextChanged { s, _, _, _ ->
+            val pos = holder.adapterPosition
+            if(pos != RecyclerView.NO_POSITION) {
+                options[pos] = s.toString()
+                onOptionChanged(validateInput())
+            }
+        }
+
+        return holder
+    }
+
+    override fun getItemCount() = options.size
+
+    override fun onBindViewHolder(holder: BindingHolder<ItemAddPollOptionBinding>, position: Int) {
+        holder.binding.optionEditText.setText(options[position])
+
+        holder.binding.optionTextInputLayout.hint = holder.binding.root.context.getString(R.string.poll_new_choice_hint, position + 1)
+
+        holder.binding.deleteButton.visible(position > 1, View.INVISIBLE)
+
+        holder.binding.deleteButton.setOnClickListener {
+            holder.binding.optionEditText.clearFocus()
+            options.removeAt(holder.adapterPosition)
+            notifyItemRemoved(holder.adapterPosition)
+            onOptionRemoved(validateInput())
+        }
+    }
+
+    private fun validateInput(): Boolean {
+        if (options.contains("") || options.distinct().size != options.size) {
+            return false
+        }
+
+        return true
+    }
+}