Add fastscroller with alphabetic hints (#616)

* Setup basic fast scroll

Work towards #558 

* Implement PopupTextProvider

Fixes #558

* Update changes

* Hide system scrollbars

* Port fastscroll to autofill preferences

* Spotless

Signed-off-by: Harsh Shandilya <msfjarvis@gmail.com>

6 files changed, 25 insertions, 6 deletions

diff --git a/app/src/main/java/com/zeapo/pwdstore/PasswordFragment.kt b/app/src/main/java/com/zeapo/pwdstore/PasswordFragment.kt
index 279869bc..61437731 100644
--- a/app/src/main/java/com/zeapo/pwdstore/PasswordFragment.kt
+++ b/app/src/main/java/com/zeapo/pwdstore/PasswordFragment.kt
@@ -26,6 +26,7 @@ import com.zeapo.pwdstore.utils.PasswordRepository.PasswordSortOrder.Companion.g
 import java.io.File
 import java.util.Locale
 import java.util.Stack
+import me.zhanghai.android.fastscroll.FastScrollerBuilder
 
 /**
  * A fragment representing a list of Items.
@@ -67,6 +68,8 @@ class PasswordFragment : Fragment() {
         recyclerView.addItemDecoration(DividerItemDecoration(requireContext(), DividerItemDecoration.VERTICAL))
         // Set the adapter
         recyclerView.adapter = recyclerAdapter
+        // Setup fast scroller
+        FastScrollerBuilder(recyclerView).build()
         val fab: FloatingActionButton = view.findViewById(R.id.fab)
         fab.setOnClickListener { (requireActivity() as PasswordStore).createPassword() }
         registerForContextMenu(recyclerView)
diff --git a/app/src/main/java/com/zeapo/pwdstore/autofill/AutofillPreferenceActivity.kt b/app/src/main/java/com/zeapo/pwdstore/autofill/AutofillPreferenceActivity.kt
index 3fe5e9e7..5c49bf81 100644
--- a/app/src/main/java/com/zeapo/pwdstore/autofill/AutofillPreferenceActivity.kt
+++ b/app/src/main/java/com/zeapo/pwdstore/autofill/AutofillPreferenceActivity.kt
@@ -21,6 +21,7 @@ import com.google.android.material.floatingactionbutton.FloatingActionButton
 import com.zeapo.pwdstore.R
 import java.lang.ref.WeakReference
 import java.util.ArrayList
+import me.zhanghai.android.fastscroll.FastScrollerBuilder
 
 class AutofillPreferenceActivity : AppCompatActivity() {
 
@@ -39,6 +40,7 @@ class AutofillPreferenceActivity : AppCompatActivity() {
         val layoutManager = LinearLayoutManager(this)
         recyclerView!!.layoutManager = layoutManager
         recyclerView!!.addItemDecoration(DividerItemDecoration(this, DividerItemDecoration.VERTICAL))
+        FastScrollerBuilder(recyclerView!!).build()
 
         pm = packageManager
 
diff --git a/app/src/main/java/com/zeapo/pwdstore/autofill/AutofillRecyclerAdapter.kt b/app/src/main/java/com/zeapo/pwdstore/autofill/AutofillRecyclerAdapter.kt
index 139f9582..47937a32 100644
--- a/app/src/main/java/com/zeapo/pwdstore/autofill/AutofillRecyclerAdapter.kt
+++ b/app/src/main/java/com/zeapo/pwdstore/autofill/AutofillRecyclerAdapter.kt
@@ -20,11 +20,12 @@ import com.zeapo.pwdstore.R
 import com.zeapo.pwdstore.utils.splitLines
 import java.util.ArrayList
 import java.util.Locale
+import me.zhanghai.android.fastscroll.PopupTextProvider
 
 internal class AutofillRecyclerAdapter(
     allApps: List<AppInfo>,
     private val activity: AutofillPreferenceActivity
-) : RecyclerView.Adapter<AutofillRecyclerAdapter.ViewHolder>() {
+) : RecyclerView.Adapter<AutofillRecyclerAdapter.ViewHolder>(), PopupTextProvider {
 
     private val apps: SortedList<AppInfo>
     private val allApps: ArrayList<AppInfo> // for filtering, maintain a list of all
@@ -56,6 +57,10 @@ internal class AutofillRecyclerAdapter(
         }
     }
 
+    override fun getPopupText(position: Int): String {
+        return allApps[position].appName[0].toString().toUpperCase(Locale.getDefault())
+    }
+
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
         val v = LayoutInflater.from(parent.context)
                 .inflate(R.layout.autofill_row_layout, parent, false)
diff --git a/app/src/main/java/com/zeapo/pwdstore/ui/adapters/EntryRecyclerAdapter.kt b/app/src/main/java/com/zeapo/pwdstore/ui/adapters/EntryRecyclerAdapter.kt
index 6ddfa777..81aa4f05 100644
--- a/app/src/main/java/com/zeapo/pwdstore/ui/adapters/EntryRecyclerAdapter.kt
+++ b/app/src/main/java/com/zeapo/pwdstore/ui/adapters/EntryRecyclerAdapter.kt
@@ -19,9 +19,11 @@ import com.zeapo.pwdstore.utils.PasswordItem
 import com.zeapo.pwdstore.widget.MultiselectableConstraintLayout
 import java.io.File
 import java.util.ArrayList
+import java.util.Locale
 import java.util.TreeSet
+import me.zhanghai.android.fastscroll.PopupTextProvider
 
-abstract class EntryRecyclerAdapter internal constructor(val values: ArrayList<PasswordItem>) : RecyclerView.Adapter<EntryRecyclerAdapter.ViewHolder>() {
+abstract class EntryRecyclerAdapter internal constructor(val values: ArrayList<PasswordItem>) : RecyclerView.Adapter<EntryRecyclerAdapter.ViewHolder>(), PopupTextProvider {
     internal val selectedItems: MutableSet<Int> = TreeSet()
     internal var settings: SharedPreferences? = null
 
@@ -30,6 +32,10 @@ abstract class EntryRecyclerAdapter internal constructor(val values: ArrayList<P
         return values.size
     }
 
+    override fun getPopupText(position: Int): String {
+        return values[position].name[0].toString().toUpperCase(Locale.getDefault())
+    }
+
     fun clear() {
         this.values.clear()
         this.notifyDataSetChanged()
diff --git a/app/src/main/res/layout/autofill_recycler_view.xml b/app/src/main/res/layout/autofill_recycler_view.xml
index 7a987e5f..c3a4a9f3 100644
--- a/app/src/main/res/layout/autofill_recycler_view.xml
+++ b/app/src/main/res/layout/autofill_recycler_view.xml
@@ -1,14 +1,17 @@
 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+                xmlns:app="http://schemas.android.com/apk/res-auto"
+                xmlns:tools="http://schemas.android.com/tools"
                 android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                xmlns:app="http://schemas.android.com/apk/res-auto">
+                android:layout_height="match_parent">
 
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/autofill_recycler"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:scrollbars="vertical" />
+        android:scrollbars="none"
+        tools:listitem="@layout/autofill_row_layout"
+        tools:itemCount="20"/>
 
     <ProgressBar
         android:id="@+id/progress_bar"
diff --git a/app/src/main/res/layout/password_recycler_view.xml b/app/src/main/res/layout/password_recycler_view.xml
index 69dc8867..07596335 100644
--- a/app/src/main/res/layout/password_recycler_view.xml
+++ b/app/src/main/res/layout/password_recycler_view.xml
@@ -9,7 +9,7 @@
 
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/pass_recycler"
-        android:scrollbars="vertical"
+        android:scrollbars="none"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         tools:listitem="@layout/password_row_layout"