For #356 - Gives a user the ability to delete their history

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

@@ -13,8 +13,6 @@ import android.widget.CompoundButton
 import androidx.recyclerview.widget.RecyclerView
 import io.reactivex.Observer
 import org.mozilla.fenix.R
-import androidx.core.content.ContextCompat
-import kotlinx.android.synthetic.main.history_delete.view.*
 import kotlinx.android.synthetic.main.history_header.view.*
 import kotlinx.android.synthetic.main.history_list_item.view.*
 import mozilla.components.browser.menu.BrowserMenu
@@ -226,48 +224,6 @@ class HistoryAdapter(
         }
     }
 
-    class HistoryDeleteViewHolder(
-        view: View,
-        private val actionEmitter: Observer<HistoryAction>
-    ) : RecyclerView.ViewHolder(view) {
-        private lateinit var mode: HistoryState.Mode
-
-        private val button = view.delete_history_button.apply {
-            setOnClickListener {
-                val mode = mode
-                if (mode is HistoryState.Mode.Editing && mode.selectedItems.isNotEmpty()) {
-                    actionEmitter.onNext(HistoryAction.Delete.Some(mode.selectedItems))
-                } else {
-                    actionEmitter.onNext(HistoryAction.Delete.All)
-                }
-            }
-        }
-
-        private val text = view.delete_history_button_text.apply {
-            val color = ContextCompat.getColor(context, R.color.photonRed60)
-            val drawable = ContextCompat.getDrawable(context, R.drawable.ic_delete)
-            drawable?.setTint(color)
-            this.setCompoundDrawablesWithIntrinsicBounds(drawable, null, null, null)
-        }
-
-        fun bind(mode: HistoryState.Mode) {
-            this.mode = mode
-
-            val text = if (mode is HistoryState.Mode.Editing && mode.selectedItems.isNotEmpty()) {
-                text.context.resources.getString(R.string.history_delete_some, mode.selectedItems.size)
-            } else {
-                text.context.resources.getString(R.string.history_delete_all)
-            }
-
-            button.contentDescription = text
-            this.text.text = text
-        }
-
-        companion object {
-            const val LAYOUT_ID = R.layout.history_delete
-        }
-    }
-
     private var historyList: HistoryList = HistoryList(emptyList())
     private var mode: HistoryState.Mode = HistoryState.Mode.Normal
 

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

@@ -39,7 +39,7 @@ class HistoryComponent(
 
     override val reducer: (HistoryState, HistoryChange) -> HistoryState = { state, change ->
         when (change) {
-            is HistoryChange.Change -> state.copy(items = change.list)
+            is HistoryChange.Change -> state.copy(mode = HistoryState.Mode.Normal, items = change.list)
             is HistoryChange.EnterEditMode -> state.copy(mode = HistoryState.Mode.Editing(listOf(change.item)))
             is HistoryChange.AddItemForRemoval -> {
                 val mode = state.mode

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

@@ -17,9 +17,10 @@ import androidx.navigation.NavOptions
 import androidx.navigation.Navigation
 import kotlinx.android.synthetic.main.fragment_history.view.*
 import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.coroutineScope
 import mozilla.components.support.base.feature.BackHandler
 import org.mozilla.fenix.utils.ItsNotBrokenSnack
 import org.mozilla.fenix.R
@@ -29,6 +30,7 @@ import org.mozilla.fenix.mvi.getAutoDisposeObservable
 import org.mozilla.fenix.mvi.getManagedEmitter
 import kotlin.coroutines.CoroutineContext
 
+@SuppressWarnings("TooManyFunctions")
 class HistoryFragment : Fragment(), CoroutineScope, BackHandler {
 
     private lateinit var job: Job
@@ -81,18 +83,13 @@ class HistoryFragment : Fragment(), CoroutineScope, BackHandler {
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
-
         launch(Dispatchers.IO) {
-            val items = requireComponents.core.historyStorage.getDetailedVisits(0)
-                .asReversed()
-                .mapIndexed { id, item -> HistoryItem(id, item.url, item.visitTime) }
-
-            launch(Dispatchers.Main) {
-                getManagedEmitter<HistoryChange>().onNext(HistoryChange.Change(items))
-            }
+            reloadData()
         }
     }
 
+    // This method triggers the complexity warning. However it's actually not that hard to understand.
+    @SuppressWarnings("ComplexMethod")
     override fun onStart() {
         super.onStart()
         getAutoDisposeObservable<HistoryAction>()
@@ -107,6 +104,20 @@ class HistoryFragment : Fragment(), CoroutineScope, BackHandler {
                         .onNext(HistoryChange.RemoveItemForRemoval(it.item))
                     is HistoryAction.BackPressed -> getManagedEmitter<HistoryChange>()
                         .onNext(HistoryChange.ExitEditMode)
+                    is HistoryAction.Delete.All -> launch(Dispatchers.IO) {
+                        requireComponents.core.historyStorage.deleteEverything()
+                        reloadData()
+                    }
+                    is HistoryAction.Delete.One -> launch(Dispatchers.IO) {
+                        requireComponents.core.historyStorage.deleteVisit(it.item.url, it.item.visitedAt)
+                        reloadData()
+                    }
+                    is HistoryAction.Delete.Some -> launch(Dispatchers.IO) {
+                        it.items.forEach { item ->
+                            requireComponents.core.historyStorage.deleteVisit(item.url, item.visitedAt)
+                        }
+                        reloadData()
+                    }
                 }
             }
     }
@@ -128,4 +139,16 @@ class HistoryFragment : Fragment(), CoroutineScope, BackHandler {
     }
 
     override fun onBackPressed(): Boolean = (historyComponent.uiView as HistoryUIView).onBackPressed()
+
+    private suspend fun reloadData() {
+        val items = requireComponents.core.historyStorage.getDetailedVisits(0)
+            .asReversed()
+            .mapIndexed { id, item -> HistoryItem(id, item.url, item.visitTime) }
+
+        coroutineScope {
+            launch(Dispatchers.Main) {
+                getManagedEmitter<HistoryChange>().onNext(HistoryChange.Change(items))
+            }
+        }
+    }
 }

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

@@ -6,11 +6,12 @@ package org.mozilla.fenix.library.history
 
 import android.view.LayoutInflater
 import android.view.ViewGroup
+import androidx.core.widget.NestedScrollView
 import androidx.recyclerview.widget.LinearLayoutManager
-import androidx.recyclerview.widget.RecyclerView
 import io.reactivex.Observable
 import io.reactivex.Observer
 import io.reactivex.functions.Consumer
+import kotlinx.android.synthetic.main.component_history.view.*
 import mozilla.components.support.base.feature.BackHandler
 import org.mozilla.fenix.R
 import org.mozilla.fenix.mvi.UIView
@@ -26,22 +27,48 @@ class HistoryUIView(
     var mode: HistoryState.Mode = HistoryState.Mode.Normal
         private set
 
-    override val view: RecyclerView = LayoutInflater.from(container.context)
+    override val view: NestedScrollView = LayoutInflater.from(container.context)
         .inflate(R.layout.component_history, container, true)
-        .findViewById(R.id.history_list)
+        .findViewById(R.id.history_wrapper)
 
     init {
-        view.apply {
+        view.history_list.apply {
             adapter = HistoryAdapter(actionEmitter)
             layoutManager = LinearLayoutManager(container.context)
         }
+
+        view.delete_history_button.setOnClickListener {
+            val mode = mode
+            val action = when (mode) {
+                is HistoryState.Mode.Normal -> HistoryAction.Delete.All
+                is HistoryState.Mode.Editing -> HistoryAction.Delete.Some(mode.selectedItems)
+            }
+
+            actionEmitter.onNext(action)
+        }
     }
 
     override fun updateView() = Consumer<HistoryState> {
         mode = it.mode
-        (view.adapter as HistoryAdapter).updateData(it.items, it.mode)
+        updateDeleteButton()
+        (view.history_list.adapter as HistoryAdapter).updateData(it.items, it.mode)
     }
 
+    private fun updateDeleteButton() {
+        val mode = mode
+
+        val text = if (mode is HistoryState.Mode.Editing && mode.selectedItems.isNotEmpty()) {
+            view.delete_history_button_text.context.resources.getString(
+                R.string.history_delete_some,
+                mode.selectedItems.size
+            )
+        } else {
+            view.delete_history_button_text.context.resources.getString(R.string.history_delete_all)
+        }
+
+        view.delete_history_button.contentDescription = text
+        view.delete_history_button_text.text = text
+    }
     override fun onBackPressed(): Boolean {
         if (mode is HistoryState.Mode.Editing) {
             actionEmitter.onNext(HistoryAction.BackPressed)

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

@@ -3,8 +3,42 @@
    - 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/. -->
 
-<androidx.recyclerview.widget.RecyclerView
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@+id/history_list"
+<androidx.core.widget.NestedScrollView
+    android:id="@+id/history_wrapper"
+    android:layout_height="wrap_content"
     android:layout_width="match_parent"
-    android:layout_height="match_parent" />
+    xmlns:android="http://schemas.android.com/apk/res/android">
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical">
+        <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+            android:id="@+id/delete_history_button"
+            android:foreground="?android:attr/selectableItemBackground"
+            android:background="@drawable/button_background"
+            android:layout_margin="16dp"
+            android:padding="6dp"
+            android:clickable="true"
+            android:focusable="true"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content">
+
+            <TextView
+                android:id="@+id/delete_history_button_text"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text="@string/history_delete_all"
+                android:textColor="@color/photonRed60"
+                android:drawablePadding="8dp"
+                android:textSize="16sp"
+                android:gravity="center"
+                android:clickable="false"
+                android:focusable="false"
+                android:layout_gravity="center" />
+        </FrameLayout>
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/history_list"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content" />
+    </LinearLayout>
+</androidx.core.widget.NestedScrollView>

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

@@ -1,28 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - 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"
-    android:id="@+id/delete_history_button"
-    android:foreground="?android:attr/selectableItemBackground"
-    android:background="@drawable/button_background"
-    android:layout_margin="16dp"
-    android:padding="6dp"
-    android:clickable="true"
-    android:focusable="true"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content">
-
-    <TextView
-        android:id="@+id/delete_history_button_text"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="@string/history_delete_all"
-        android:textColor="@color/photonRed60"
-        android:drawablePadding="8dp"
-        android:textSize="16sp"
-        android:gravity="center"
-        android:clickable="false"
-        android:focusable="false"
-        android:layout_gravity="center" />
-</FrameLayout>