remove scrolling from notification options bar (#1858)

app/src/main/java/com/keylesspalace/tusky/util/AppBarLayoutNoEmptyScrollBehavior.kt

@@ -1,74 +0,0 @@
-/* Copyright 2019 Joel Pyska
- *
- * This file is a part of Tusky.
- *
- * This program is free software; you can redistribute it and/or modify it under the terms of the
- * GNU General Public License as published by the Free Software Foundation; either version 3 of the
- * License, or (at your option) any later version.
- *
- * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
- * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
- * Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along with Tusky; if not,
- * see <http://www.gnu.org/licenses>. */
-
-package com.keylesspalace.tusky.util
-
-import android.content.Context
-import android.util.AttributeSet
-import android.view.MotionEvent
-import com.google.android.material.appbar.AppBarLayout
-import androidx.coordinatorlayout.widget.CoordinatorLayout
-import android.view.View
-import android.view.ViewGroup
-import androidx.recyclerview.widget.RecyclerView
-
-
-/**
- * Disable AppBar scroll if content view empty or don't need to scroll
- */
-class AppBarLayoutNoEmptyScrollBehavior : AppBarLayout.Behavior {
-
-    constructor() : super()
-
-    constructor (context: Context, attrs: AttributeSet) : super(context, attrs)
-
-    private fun isRecyclerViewScrollable(appBar: AppBarLayout, recyclerView: RecyclerView?): Boolean {
-        if (recyclerView == null)
-            return false
-        var recyclerViewHeight = recyclerView.height // Height includes RecyclerView plus AppBarLayout at same level
-        val appCompatHeight = appBar.height
-        recyclerViewHeight -= appCompatHeight
-
-        return recyclerView.computeVerticalScrollRange() > recyclerViewHeight
-    }
-
-    override fun onStartNestedScroll(parent: CoordinatorLayout, child: AppBarLayout, directTargetChild: View, target: View, nestedScrollAxes: Int, type: Int): Boolean {
-        return if (isRecyclerViewScrollable(child, getRecyclerView(parent))) {
-            super.onStartNestedScroll(parent, child, directTargetChild, target, nestedScrollAxes, type)
-        } else false
-    }
-
-    override fun onTouchEvent(parent: CoordinatorLayout, child: AppBarLayout, ev: MotionEvent): Boolean {
-        //Prevent scroll on app bar drag
-        return if (child.isShown && !isRecyclerViewScrollable(child, getRecyclerView(parent)))
-            true
-        else
-            super.onTouchEvent(parent, child, ev)
-    }
-
-    private fun getRecyclerView(parent: ViewGroup): RecyclerView? {
-        for (i in 0 until parent.childCount) {
-            val child = parent.getChildAt(i)
-            if (child is RecyclerView)
-                return child
-            else if (child is ViewGroup) {
-                val childRecyclerView = getRecyclerView(child)
-                if (childRecyclerView is RecyclerView)
-                    return childRecyclerView
-            }
-        }
-        return null
-    }
-}

app/src/main/res/layout-sw640dp/fragment_timeline_notifications.xml

@@ -17,15 +17,13 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:background="?attr/colorSurface"
-            app:elevation="0dp"
-            app:layout_behavior="com.keylesspalace.tusky.util.AppBarLayoutNoEmptyScrollBehavior">
+            app:elevation="0dp">
 
             <LinearLayout
                 android:id="@+id/topButtonsLayout"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:orientation="horizontal"
-                app:layout_scrollFlags="scroll|enterAlways">
+                android:orientation="horizontal">
 
                 <Button
                     android:id="@+id/buttonClear"

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

@@ -11,15 +11,13 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:background="?attr/colorSurface"
-        app:elevation="0dp"
-        app:layout_behavior="com.keylesspalace.tusky.util.AppBarLayoutNoEmptyScrollBehavior">
+        app:elevation="0dp">
 
         <LinearLayout
             android:id="@+id/topButtonsLayout"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:orientation="horizontal"
-            app:layout_scrollFlags="scroll|enterAlways">
+            android:orientation="horizontal">
 
             <Button
                 android:id="@+id/buttonClear"