apk/src/com/android/healthconnect/controller/datasources/appsources/AppSourcesItemMoveCallback.kt

/**
 * Copyright (C) 2023 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.healthconnect.controller.datasources.appsources

import android.graphics.Canvas
import androidx.recyclerview.widget.ItemTouchHelper
import androidx.recyclerview.widget.RecyclerView

class AppSourcesItemMoveCallback(private val adapter: AppSourcesAdapter) :
        ItemTouchHelper.Callback() {

    override fun isLongPressDragEnabled(): Boolean = false

    override fun isItemViewSwipeEnabled(): Boolean = false

    override fun getMovementFlags(
            recyclerView: RecyclerView,
            viewHolder: RecyclerView.ViewHolder
    ): Int {
        val dragFlags: Int = ItemTouchHelper.UP or ItemTouchHelper.DOWN
        return makeMovementFlags(dragFlags, /* swipeFlags= */ 0)
    }

    override fun onMove(
            recyclerView: RecyclerView,
            viewHolder: RecyclerView.ViewHolder,
            target: RecyclerView.ViewHolder
    ): Boolean {
        return adapter.onItemMove(viewHolder.bindingAdapterPosition, target.bindingAdapterPosition)
    }

    override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {}

    override fun onChildDraw(
            c: Canvas,
            recyclerView: RecyclerView,
            viewHolder: RecyclerView.ViewHolder,
            dX: Float,
            dY: Float,
            actionState: Int,
            isCurrentlyActive: Boolean
    ) {
        val topY: Float = viewHolder.itemView.top + dY
        val bottomY: Float = topY + viewHolder.itemView.height

        // Only redraw child if it is inbounds of view
        if (topY > 0 && bottomY < recyclerView.height) {
            super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive)
        }
    }
}