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.systemui.qs.panels.shared.model 18 19 /** Represents a tile of type [T] associated with a width */ 20 interface SizedTile<T> { 21 val tile: T 22 val width: Int 23 val isIcon: Boolean 24 get() = width == 1 25 } 26 27 data class SizedTileImpl<T>( 28 override val tile: T, 29 override val width: Int, 30 ) : SizedTile<T> 31 32 /** Represents a row of [SizedTile] with a maximum width of [columns] */ 33 class TileRow<T>(private val columns: Int) { 34 private var availableColumns = columns 35 private val _tiles: MutableList<SizedTile<T>> = mutableListOf() 36 val tiles: List<SizedTile<T>> 37 get() = _tiles.toList() 38 maybeAddTilenull39 fun maybeAddTile(tile: SizedTile<T>): Boolean { 40 if (availableColumns - tile.width >= 0) { 41 _tiles.add(tile) 42 availableColumns -= tile.width 43 return true 44 } 45 return false 46 } 47 findLastIconTilenull48 fun findLastIconTile(): SizedTile<T>? { 49 return _tiles.findLast { it.width == 1 } 50 } 51 removeTilenull52 fun removeTile(tile: SizedTile<T>) { 53 _tiles.remove(tile) 54 availableColumns += tile.width 55 } 56 clearnull57 fun clear() { 58 _tiles.clear() 59 availableColumns = columns 60 } 61 isFullnull62 fun isFull(): Boolean = availableColumns == 0 63 } 64 65 /** 66 * Converts a list of [SizedTile] to a sequence of rows based on the number of columns of the grid 67 */ 68 fun <T> splitInRowsSequence( 69 tiles: List<SizedTile<T>>, 70 columns: Int, 71 ): Sequence<List<SizedTile<T>>> = sequence { 72 val row = TileRow<T>(columns) 73 for (tile in tiles) { 74 check(tile.width <= columns) 75 if (!row.maybeAddTile(tile)) { 76 // Couldn't add tile to previous row, create a row with the current tiles 77 // and start a new one 78 yield(row.tiles) 79 row.clear() 80 row.maybeAddTile(tile) 81 } 82 } 83 if (row.tiles.isNotEmpty()) { 84 yield(row.tiles) 85 } 86 } 87