For #355 - Navigat back to brows when you tap a history item

app/src/main/java/org/mozilla/fenix/library/history/HistoryComponent.kt

@@ -15,6 +15,7 @@ data class HistoryItem(val url: String) {
     val title: String
         get() = siteTitle()
 
+    @SuppressWarnings("TooGenericExceptionCaught")
     private fun siteTitle(): String {
         return try {
             URL(url).host
@@ -50,7 +51,7 @@ class HistoryComponent(
 data class HistoryState(val items: List<HistoryItem>) : ViewState
 
 sealed class HistoryAction : Action {
-    object Select : HistoryAction()
+    data class Select(val item: HistoryItem) : HistoryAction()
 }
 
 sealed class HistoryChange : Change {

app/src/main/java/org/mozilla/fenix/library/history/HistoryFragment.kt

@@ -4,6 +4,7 @@
 
 package org.mozilla.fenix.library.history
 
+import android.annotation.SuppressLint
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.Menu
@@ -22,6 +23,7 @@ import kotlinx.coroutines.launch
 import org.mozilla.fenix.R
 import org.mozilla.fenix.ext.requireComponents
 import org.mozilla.fenix.mvi.ActionBusFactory
+import org.mozilla.fenix.mvi.getSafeManagedObservable
 import kotlin.coroutines.CoroutineContext
 
 class HistoryFragment : Fragment(), CoroutineScope {
@@ -41,12 +43,23 @@ class HistoryFragment : Fragment(), CoroutineScope {
         return view
     }
 
+    @SuppressLint("CheckResult")
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         job = Job()
 
         setHasOptionsMenu(true)
         (activity as AppCompatActivity).supportActionBar?.show()
+
+        getSafeManagedObservable<HistoryAction>()
+            .subscribe {
+                if (it is HistoryAction.Select) {
+                    Navigation.findNavController(requireActivity(), R.id.container)
+                        .popBackStack(R.id.browserFragment, false)
+
+                    requireComponents.useCases.sessionUseCases.loadUrl.invoke(it.item.url)
+                }
+            }
     }
 
     override fun onDestroy() {

app/src/main/java/org/mozilla/fenix/library/history/HistoryUIView.kt

@@ -5,16 +5,10 @@
 
 package org.mozilla.fenix.library.history
 
-import android.content.Context
-import android.graphics.Color
-import android.os.Build
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import android.widget.RelativeLayout
 import android.widget.TextView
-import androidx.annotation.RequiresApi
-import androidx.constraintlayout.widget.ConstraintLayout
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import io.reactivex.Observable
@@ -36,7 +30,7 @@ class HistoryUIView(
 
     init {
         view.apply {
-            adapter = HistoryAdapter(context)
+            adapter = HistoryAdapter(actionEmitter)
             layoutManager = LinearLayoutManager(container.context)
         }
     }
@@ -46,12 +40,29 @@ class HistoryUIView(
     }
 }
 
-private class HistoryAdapter(val context: Context) : RecyclerView.Adapter<HistoryAdapter.HistoryListItemViewHolder>() {
-    class HistoryListItemViewHolder(val view: View) : RecyclerView.ViewHolder(view) {
+private class HistoryAdapter(
+    private val actionEmitter: Observer<HistoryAction>
+) : RecyclerView.Adapter<HistoryAdapter.HistoryListItemViewHolder>() {
+    class HistoryListItemViewHolder(
+        view: View,
+        private val actionEmitter: Observer<HistoryAction>
+    ) : RecyclerView.ViewHolder(view) {
+
         private var title = view.findViewById<TextView>(R.id.history_title)
         private var url = view.findViewById<TextView>(R.id.history_url)
+        private var item: HistoryItem? = null
+
+        init {
+            view.setOnClickListener {
+                item?.apply {
+                    actionEmitter.onNext(HistoryAction.Select(this))
+                }
+            }
+        }
 
         fun bind(item: HistoryItem) {
+            this.item = item
+
             title.text = item.title
             url.text = item.url
         }
@@ -71,7 +82,7 @@ private class HistoryAdapter(val context: Context) : RecyclerView.Adapter<Histor
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): HistoryListItemViewHolder {
         val view = LayoutInflater.from(parent.context).inflate(viewType, parent, false)
 
-        return HistoryListItemViewHolder(view)
+        return HistoryListItemViewHolder(view, actionEmitter)
     }
 
     override fun getItemViewType(position: Int): Int {

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

@@ -2,8 +2,11 @@
 <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    android:clickable="true"
+    android:focusable="true"
     android:padding="4dp"
     android:paddingStart="20dp"
+    android:background="?android:attr/selectableItemBackground"
     xmlns:app="http://schemas.android.com/apk/res-auto">
 
     <TextView