1 /*
2  * Copyright (C) 2023 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.intentresolver.widget
18 
19 import android.view.View
20 import androidx.recyclerview.widget.RecyclerView
21 
22 internal val RecyclerView.areAllChildrenVisible: Boolean
23     get() {
24         val count = getChildCount()
25         if (count == 0) return true
26         val first = getChildAt(0)
27         val last = getChildAt(count - 1)
28         val itemCount = adapter?.itemCount ?: 0
29         return getChildAdapterPosition(first) == 0 &&
30             getChildAdapterPosition(last) == itemCount - 1 &&
31             isFullyVisible(first) &&
32             isFullyVisible(last)
33     }
34 
RecyclerViewnull35 private fun RecyclerView.isFullyVisible(view: View): Boolean =
36     view.left >= paddingLeft && view.right <= width - paddingRight
37