1 /*
2  * Copyright (C) 2024 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.wallpaper.picker.category.ui.view.decoration
18 
19 import android.graphics.Rect
20 import android.view.View
21 import androidx.recyclerview.widget.RecyclerView
22 import com.android.wallpaper.R
23 
24 /**
25  * This class adds the appropriate padding to a category based on the number of columns it occupies
26  */
27 class CategoriesGridPaddingDecoration(val padding: Int, val columnCalculator: (Int) -> Int) :
28     RecyclerView.ItemDecoration() {
getItemOffsetsnull29     override fun getItemOffsets(
30         outRect: Rect,
31         view: View,
32         parent: RecyclerView,
33         state: RecyclerView.State
34     ) {
35 
36         outRect.left = padding
37         outRect.right = padding
38 
39         val position = parent.getChildAdapterPosition(view)
40         val columnCount = columnCalculator(position)
41         if (columnCount > 1) {
42             outRect.bottom =
43                 parent.context.resources.getDimensionPixelSize(
44                     R.dimen.grid_item_featured_category_padding_bottom
45                 )
46         } else {
47             outRect.bottom =
48                 parent.context.resources.getDimensionPixelSize(
49                     R.dimen.grid_item_category_padding_bottom
50                 )
51         }
52     }
53 }
54