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.common.preview.ui.view
18 
19 import android.content.Context
20 import android.util.AttributeSet
21 import android.view.SurfaceView
22 
23 /**
24  * [SurfaceView] that keeps the surface at a fixed size, and resizes it according to view size
25  * changes using the Hardware Scaler, rather than resizing the surface itself. It enables better
26  * efficiency in cases where resizing is frequently needed. It sets the surface at a fixed size
27  * based on the size it is initialized at.
28  */
29 class CustomizationSurfaceView(context: Context, attrs: AttributeSet? = null) :
30     SurfaceView(context, attrs) {
31 
onSizeChangednull32     override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) {
33         super.onSizeChanged(w, h, oldw, oldh)
34 
35         // TODO (b/348462236): investigate effect on scale transition and touch forwarding layout
36         if (oldw == 0 && oldh == 0) {
37             holder.surfaceFrame.let {
38                 if (it.isEmpty) holder.setFixedSize(width, height)
39                 else holder.setFixedSize(it.width(), it.height())
40             }
41         }
42     }
43 }
44