Implement recently sent messages history (UI only)

app/src/main/java/de/kuschku/quasseldroid_ng/ui/chat/ChatActivity.kt

@@ -77,6 +77,9 @@ class ChatActivity : ServiceBoundActivity(), SharedPreferences.OnSharedPreferenc
   @BindView(R.id.autocomplete_list2)
   lateinit var autocompleteList2: RecyclerView
 
+  @BindView(R.id.msg_history)
+  lateinit var msgHistory: RecyclerView
+
   private lateinit var drawerToggle: ActionBarDrawerToggle
 
   private val handler = AndroidHandlerThread("Chat")
@@ -179,6 +182,20 @@ class ChatActivity : ServiceBoundActivity(), SharedPreferences.OnSharedPreferenc
       }
     }
 
+    msgHistory.itemAnimator = DefaultItemAnimator()
+    msgHistory.layoutManager = LinearLayoutManager(this)
+    msgHistory.adapter = MessageHistoryAdapter(
+      this,
+      viewModel.recentlySentMessages,
+      handler::post,
+      ::runOnUiThread,
+      { text ->
+        chatline.setText(text)
+        chatline.setSelection(chatline.length())
+        historyPanel.panelState = SlidingUpPanelLayout.PanelState.COLLAPSED
+      }
+    )
+
     database = QuasselDatabase.Creator.init(application)
 
     setSupportActionBar(toolbar)
@@ -336,6 +353,7 @@ class ChatActivity : ServiceBoundActivity(), SharedPreferences.OnSharedPreferenc
           session.bufferSyncer?.bufferInfo(bufferId)?.also { bufferInfo ->
             val output = mutableListOf<IAliasManager.Command>()
             for (line in text.lineSequence()) {
+              viewModel.addRecentlySentMessage(line)
               session.aliasManager?.processInput(
                 bufferInfo,
                 inputEditor.formattedString,

app/src/main/java/de/kuschku/quasseldroid_ng/ui/chat/MessageHistoryAdapter.kt

+package de.kuschku.quasseldroid_ng.ui.chat
+
+import android.arch.lifecycle.LifecycleOwner
+import android.arch.lifecycle.LiveData
+import android.arch.lifecycle.Observer
+import android.support.v7.util.DiffUtil
+import android.support.v7.widget.RecyclerView
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import butterknife.BindView
+import butterknife.ButterKnife
+import de.kuschku.quasseldroid_ng.R
+
+class MessageHistoryAdapter(
+  lifecycleOwner: LifecycleOwner,
+  liveData: LiveData<List<CharSequence>?>,
+  runInBackground: (() -> Unit) -> Any,
+  runOnUiThread: (Runnable) -> Any,
+  private val clickListener: ((CharSequence) -> Unit)? = null
+) : RecyclerView.Adapter<MessageHistoryAdapter.MessageViewHolder>() {
+  var data = mutableListOf<CharSequence>()
+
+  init {
+    liveData.observe(lifecycleOwner, Observer { it: List<CharSequence>? ->
+      runInBackground {
+        val list = it ?: emptyList()
+        val old: List<CharSequence> = data
+        val new: List<CharSequence> = list
+        val result = DiffUtil.calculateDiff(object : DiffUtil.Callback() {
+          override fun areItemsTheSame(oldItemPosition: Int, newItemPosition: Int) =
+            old[oldItemPosition] == new[newItemPosition]
+
+          override fun getOldListSize() = old.size
+          override fun getNewListSize() = new.size
+          override fun areContentsTheSame(oldItemPosition: Int, newItemPosition: Int) =
+            old[oldItemPosition] == new[newItemPosition]
+        }, true)
+        runOnUiThread(Runnable {
+          data.clear()
+          data.addAll(new)
+          result.dispatchUpdatesTo(this@MessageHistoryAdapter)
+        })
+      }
+    })
+  }
+
+  override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = MessageViewHolder(
+    LayoutInflater.from(parent.context).inflate(R.layout.widget_history_message, parent, false),
+    clickListener = clickListener
+  )
+
+  override fun onBindViewHolder(holder: MessageViewHolder, position: Int) =
+    holder.bind(data[position])
+
+  override fun getItemCount() = data.size
+
+  class MessageViewHolder(
+    itemView: View,
+    private val clickListener: ((CharSequence) -> Unit)? = null
+  ) : RecyclerView.ViewHolder(itemView) {
+    @BindView(R.id.content)
+    lateinit var content: TextView
+
+    var value: CharSequence? = null
+
+    init {
+      ButterKnife.bind(this, itemView)
+      itemView.setOnClickListener {
+        val value = value
+        if (value != null)
+          clickListener?.invoke(value)
+      }
+    }
+
+    fun bind(data: CharSequence) {
+      value = data
+
+      content.text = data
+    }
+  }
+}
\ No newline at end of file

app/src/main/java/de/kuschku/quasseldroid_ng/ui/viewmodel/QuasselViewModel.kt

@@ -43,6 +43,16 @@ class QuasselViewModel : ViewModel() {
     this.bufferViewConfig.value = bufferViewConfig
   }
 
+  val MAX_RECENT_MESSAGES = 20
+  val recentlySentMessages = MutableLiveData<List<CharSequence>>()
+  fun addRecentlySentMessage(message: CharSequence) {
+    recentlySentMessages.value =
+      listOf(message) +
+      recentlySentMessages.value.orEmpty()
+        .filter { it == message }
+        .take(MAX_RECENT_MESSAGES - 1)
+  }
+
   val backend = backendWrapper.switchMap { it }
   val sessionManager = backend.map { it.sessionManager() }
   val session = sessionManager.switchMapRx { it.session }
@@ -490,5 +500,6 @@ class QuasselViewModel : ViewModel() {
     showHidden.postValue(false)
     selectedBufferId.postValue(-1)
     collapsedNetworks.value = emptySet()
+    recentlySentMessages.value = emptyList()
   }
 }

app/src/main/res/layout/widget_history_message.xml

+<?xml version="1.0" encoding="utf-8"?>
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+  xmlns:tools="http://schemas.android.com/tools"
+  android:id="@+id/content"
+  android:layout_width="match_parent"
+  android:layout_height="wrap_content"
+  android:layout_gravity="center"
+  android:background="?attr/backgroundMenuItem"
+  android:fontFamily="sans-serif-medium"
+  android:gravity="center_vertical"
+  android:minHeight="48dp"
+  android:paddingBottom="8dp"
+  android:paddingLeft="16dp"
+  android:paddingRight="16dp"
+  android:paddingTop="8dp"
+  android:singleLine="true"
+  android:textColor="?attr/colorTextPrimary"
+  android:textSize="13sp"
+  tools:text="Historical Message" />
\ No newline at end of file