From e7732cc15fead262cb0f904a535a9e3d7c84cc37 Mon Sep 17 00:00:00 2001
From: Blatzar <46196380+Blatzar@users.noreply.github.com>
Date: Sat, 28 Jan 2023 14:57:06 +0100
Subject: [PATCH] Smoother fast scrolling in library & no labels

---
 .../ui/library/LibraryFragment.kt             | 29 ++++++++++++++++---
 app/src/main/res/layout/activity_main.xml     |  4 +--
 app/src/main/res/layout/fragment_library.xml  |  1 +
 app/src/main/res/menu/bottom_nav_menu.xml     |  6 ++--
 4 files changed, 31 insertions(+), 9 deletions(-)

diff --git a/app/src/main/java/com/lagradost/cloudstream3/ui/library/LibraryFragment.kt b/app/src/main/java/com/lagradost/cloudstream3/ui/library/LibraryFragment.kt
index 5e2e5c45..7f025b74 100644
--- a/app/src/main/java/com/lagradost/cloudstream3/ui/library/LibraryFragment.kt
+++ b/app/src/main/java/com/lagradost/cloudstream3/ui/library/LibraryFragment.kt
@@ -10,10 +10,9 @@ import androidx.fragment.app.Fragment
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import android.widget.ArrayAdapter
+import android.view.animation.AlphaAnimation
 import androidx.annotation.StringRes
 import androidx.appcompat.widget.SearchView
-import androidx.core.os.postDelayed
 import androidx.core.view.isVisible
 import androidx.fragment.app.activityViewModels
 import com.google.android.material.tabs.TabLayoutMediator
@@ -25,7 +24,6 @@ import com.lagradost.cloudstream3.AcraApplication.Companion.setKey
 import com.lagradost.cloudstream3.R
 import com.lagradost.cloudstream3.mvvm.Resource
 import com.lagradost.cloudstream3.mvvm.debugAssert
-import com.lagradost.cloudstream3.mvvm.normalSafeApiCall
 import com.lagradost.cloudstream3.mvvm.observe
 import com.lagradost.cloudstream3.syncproviders.SyncAPI
 import com.lagradost.cloudstream3.syncproviders.SyncIdName
@@ -40,7 +38,7 @@ import com.lagradost.cloudstream3.utils.SingleSelectionHelper.showBottomDialog
 import com.lagradost.cloudstream3.utils.UIHelper.fixPaddingStatusbar
 import com.lagradost.cloudstream3.utils.UIHelper.getSpanCount
 import kotlinx.android.synthetic.main.fragment_library.*
-import kotlinx.coroutines.delay
+import kotlin.math.abs
 
 const val LIBRARY_FOLDER = "library_folder"
 
@@ -339,11 +337,34 @@ class LibraryFragment : Fragment() {
                         savedInstanceState.remove(VIEWPAGER_ITEM_KEY)
                     }
 
+                    // Since the animation to scroll multiple items is so much its better to just hide
+                    // the viewpager a bit while the fastest animation is running
+                    fun hideViewpager(distance: Int) {
+                        if (distance < 3) return
+
+                        val hideAnimation = AlphaAnimation(1f, 0f).apply {
+                            duration = distance * 50L
+                            fillAfter = true
+                        }
+                        val showAnimation = AlphaAnimation(0f, 1f).apply {
+                            duration = distance * 50L
+                            startOffset = distance * 100L
+                            fillAfter = true
+                        }
+                        viewpager?.startAnimation(hideAnimation)
+                        viewpager?.startAnimation(showAnimation)
+                    }
+
                     TabLayoutMediator(
                         library_tab_layout,
                         viewpager,
                     ) { tab, position ->
                         tab.text = pages.getOrNull(position)?.title?.asStringNull(context)
+                        tab.view.setOnClickListener {
+                            val currentItem = viewpager?.currentItem ?: return@setOnClickListener
+                            val distance = abs(position - currentItem)
+                            hideViewpager(distance)
+                        }
                     }.attach()
                 }
                 is Resource.Loading -> {
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index ad29d22a..b6290865 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -35,9 +35,9 @@
                   -->
         <com.google.android.material.bottomnavigation.BottomNavigationView
             android:id="@+id/nav_view"
-            android:layout_height="wrap_content"
+            android:layout_height="70dp"
             android:layout_width="0dp"
-            app:labelVisibilityMode="labeled"
+            app:labelVisibilityMode="unlabeled"
             android:background="?attr/primaryGrayBackground"
 
             app:itemIconTint="@color/item_select_color"
diff --git a/app/src/main/res/layout/fragment_library.xml b/app/src/main/res/layout/fragment_library.xml
index c9b1e3a0..7230a34b 100644
--- a/app/src/main/res/layout/fragment_library.xml
+++ b/app/src/main/res/layout/fragment_library.xml
@@ -92,6 +92,7 @@
     <FrameLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
+        android:animateLayoutChanges="true"
         app:layout_behavior="@string/appbar_scrolling_view_behavior">
 
         <androidx.viewpager2.widget.ViewPager2
diff --git a/app/src/main/res/menu/bottom_nav_menu.xml b/app/src/main/res/menu/bottom_nav_menu.xml
index 28aeafe6..cb620bb8 100644
--- a/app/src/main/res/menu/bottom_nav_menu.xml
+++ b/app/src/main/res/menu/bottom_nav_menu.xml
@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android">
     <item
-            android:id="@+id/navigation_home"
-            android:icon="@drawable/home_alt"
-            android:title="@string/title_home"/>
+        android:id="@+id/navigation_home"
+        android:icon="@drawable/home_alt"
+        android:title="@string/title_home" />
     <item
         android:id="@+id/navigation_search"
         android:icon="@drawable/search_icon"