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/*
* 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.launcher3.celllayout.testgenerator
import android.graphics.Rect
import com.android.launcher3.celllayout.board.CellLayoutBoard
import java.util.Random
/** Generates a random CellLayoutBoard. */
open class RandomBoardGenerator(generator: Random) : DeterministicRandomGenerator(generator) {
/**
* @param remainingEmptySpaces the maximum number of spaces we will fill with icons and widgets
* meaning that if the number is 100 we will try to fill the board with at most 100 spaces
* usually less than 100.
* @return a randomly generated board filled with icons and widgets.
*/
open fun generateBoard(width: Int, height: Int, remainingEmptySpaces: Int): CellLayoutBoard? {
val cellLayoutBoard = CellLayoutBoard(width, height)
return fillBoard(cellLayoutBoard, Rect(0, 0, width, height), remainingEmptySpaces)
}
protected fun fillBoard(
board: CellLayoutBoard,
area: Rect,
remainingEmptySpacesArg: Int
): CellLayoutBoard {
var remainingEmptySpaces = remainingEmptySpacesArg
if (area.height() * area.width() <= 0) return board
val width = getRandom(1, area.width() - 1)
val height = getRandom(1, area.height() - 1)
val x = area.left + getRandom(0, area.width() - width)
val y = area.top + getRandom(0, area.height() - height)
if (remainingEmptySpaces > 0) {
remainingEmptySpaces -= width * height
} else if (board.widgets.size <= 22 && width * height > 1) {
board.addWidget(x, y, width, height)
} else {
board.addIcon(x, y)
}
fillBoard(board, Rect(area.left, area.top, area.right, y), remainingEmptySpaces)
fillBoard(board, Rect(area.left, y, x, area.bottom), remainingEmptySpaces)
fillBoard(board, Rect(x, y + height, area.right, area.bottom), remainingEmptySpaces)
fillBoard(board, Rect(x + width, y, area.right, y + height), remainingEmptySpaces)
return board
}
}
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