For #2419 - Adds a deletion state to the history component

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

@@ -38,6 +38,7 @@ data class HistoryState(val items: List<HistoryItem>, val mode: Mode) : ViewStat
     sealed class Mode {
         object Normal : Mode()
         data class Editing(val selectedItems: List<HistoryItem>) : Mode()
+        object Deleting : Mode()
     }
 }
 
@@ -62,6 +63,8 @@ sealed class HistoryChange : Change {
     object ExitEditMode : HistoryChange()
     data class AddItemForRemoval(val item: HistoryItem) : HistoryChange()
     data class RemoveItemForRemoval(val item: HistoryItem) : HistoryChange()
+    object EnterDeletionMode : HistoryChange()
+    object ExitDeletionMode : HistoryChange()
 }
 
 class HistoryViewModel(
@@ -95,6 +98,8 @@ class HistoryViewModel(
                     }
                 }
                 is HistoryChange.ExitEditMode -> state.copy(mode = HistoryState.Mode.Normal)
+                is HistoryChange.EnterDeletionMode -> state.copy(mode = HistoryState.Mode.Deleting)
+                is HistoryChange.ExitDeletionMode -> state.copy(mode = HistoryState.Mode.Normal)
             }
         }
     }

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

@@ -22,6 +22,7 @@ import androidx.fragment.app.Fragment
 import androidx.navigation.Navigation
 import kotlinx.android.synthetic.main.fragment_history.view.*
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Dispatchers.Main
 import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.MainScope
@@ -106,7 +107,8 @@ class HistoryFragment : Fragment(), CoroutineScope by MainScope(), BackHandler {
                 R.menu.library_menu
             is HistoryState.Mode.Editing ->
                 R.menu.history_select_multi
-        }.let { inflater.inflate(it, menu) }
+            else -> null
+        }?.let { inflater.inflate(it, menu) }
 
         if (mode is HistoryState.Mode.Editing) {
             menu.findItem(R.id.share_history_multi_select)?.run {
@@ -237,10 +239,15 @@ class HistoryFragment : Fragment(), CoroutineScope by MainScope(), BackHandler {
                     dialog.cancel()
                 }
                 setPositiveButton(R.string.history_clear_dialog) { dialog: DialogInterface, _ ->
+                    emitChange { HistoryChange.EnterDeletionMode }
                     launch {
                         requireComponents.core.historyStorage.deleteEverything()
                         reloadData()
+                        launch(Dispatchers.Main) {
+                            emitChange { HistoryChange.ExitDeletionMode }
+                        }
                     }
+
                     dialog.dismiss()
                 }
                 create()
@@ -302,6 +309,8 @@ class HistoryFragment : Fragment(), CoroutineScope by MainScope(), BackHandler {
     private inline fun emitChange(producer: () -> HistoryChange) {
         getManagedEmitter<HistoryChange>().onNext(producer())
     }
-}
 
-private const val HISTORY_TIME_DAYS = 3L
+    companion object {
+        private const val HISTORY_TIME_DAYS = 3L
+    }
+}

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

@@ -9,10 +9,10 @@ import android.graphics.PorterDuffColorFilter
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import android.widget.FrameLayout
 import androidx.appcompat.widget.Toolbar
 import android.widget.ImageButton
 import androidx.appcompat.app.AppCompatActivity
+import androidx.constraintlayout.widget.ConstraintLayout
 import androidx.core.content.ContextCompat
 import androidx.recyclerview.widget.LinearLayoutManager
 import io.reactivex.Observable
@@ -45,7 +45,7 @@ class HistoryUIView(
 
     fun getSelected(): List<HistoryItem> = historyAdapter.selected
 
-    override val view: FrameLayout = LayoutInflater.from(container.context)
+    override val view: ConstraintLayout = LayoutInflater.from(container.context)
         .inflate(R.layout.component_history, container, true)
         .findViewById(R.id.history_wrapper)
 
@@ -58,10 +58,13 @@ class HistoryUIView(
     }
 
     override fun updateView() = Consumer<HistoryState> {
+        view.progress_bar.visibility = if (it.mode is HistoryState.Mode.Deleting) View.VISIBLE else View.GONE
+
         if (it.mode != mode) {
             mode = it.mode
             actionEmitter.onNext(HistoryAction.SwitchMode)
         }
+
         (view.history_list.adapter as HistoryAdapter).updateData(it.items, it.mode)
 
         items = it.items
@@ -128,8 +131,8 @@ class HistoryUIView(
     }
 
     override fun onBackPressed(): Boolean {
-        return when {
-            mode is HistoryState.Mode.Editing -> {
+        return when (mode) {
+            is HistoryState.Mode.Editing -> {
                 mode = HistoryState.Mode.Normal
                 historyAdapter.updateData(items, mode)
                 setUIForNormalMode(items.isEmpty())

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

@@ -25,7 +25,8 @@ class HistoryDeleteButtonViewHolder(
                 val action = when (it) {
                     is HistoryState.Mode.Normal -> HistoryAction.Delete.All
                     is HistoryState.Mode.Editing -> HistoryAction.Delete.Some(it.selectedItems)
-                }
+                    is HistoryState.Mode.Deleting -> null
+                } ?: return@also
 
                 actionEmitter.onNext(action)
             }
@@ -35,7 +36,8 @@ class HistoryDeleteButtonViewHolder(
         this.mode = mode
 
         buttonView.run {
-            if (mode is HistoryState.Mode.Editing && mode.selectedItems.isNotEmpty()) {
+            val isDeleting = mode is HistoryState.Mode.Deleting
+            if (isDeleting || mode is HistoryState.Mode.Editing && mode.selectedItems.isNotEmpty()) {
                 isEnabled = false
                 alpha = DISABLED_ALPHA
             } else {

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

@@ -85,7 +85,7 @@ class HistoryListItemViewHolder(
 
         val selected = when (mode) {
             is HistoryState.Mode.Editing -> mode.selectedItems.contains(item)
-            HistoryState.Mode.Normal -> false
+            else -> false
         }
 
         setClickListeners(item, selected)

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

@@ -3,11 +3,21 @@
    - License, v. 2.0. If a copy of the MPL was not distributed with this
    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/history_wrapper"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
+    <ProgressBar
+        android:id="@+id/progress_bar"
+        style="@style/Widget.AppCompat.ProgressBar.Horizontal"
+        android:indeterminate="true"
+        android:layout_width="match_parent"
+        android:layout_height="8dp"
+        android:translationY="-3dp"
+        android:visibility="gone"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintStart_toStartOf="parent" />
 
     <TextView
         android:id="@+id/history_empty_view"
@@ -17,9 +27,13 @@
         android:text="@string/history_empty_message"
         android:textColor="?secondaryText"
         android:textSize="16sp"
-        android:visibility="gone" />
+        android:visibility="gone"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent" />
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/history_list"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
-</FrameLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>