/*
 * Copyright (C) 2024 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.wallpaper.picker.common.preview.ui.view

import android.content.Context
import android.util.AttributeSet
import android.view.SurfaceView

/**
 * [SurfaceView] that keeps the surface at a fixed size, and resizes it according to view size
 * changes using the Hardware Scaler, rather than resizing the surface itself. It enables better
 * efficiency in cases where resizing is frequently needed. It sets the surface at a fixed size
 * based on the size it is initialized at.
 */
class CustomizationSurfaceView(context: Context, attrs: AttributeSet? = null) :
    SurfaceView(context, attrs) {

    override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) {
        super.onSizeChanged(w, h, oldw, oldh)

        // TODO (b/348462236): investigate effect on scale transition and touch forwarding layout
        if (oldw == 0 && oldh == 0) {
            holder.surfaceFrame.let {
                if (it.isEmpty) holder.setFixedSize(width, height)
                else holder.setFixedSize(it.width(), it.height())
            }
        }
    }
}