121 lines
3.4 KiB
JavaScript
121 lines
3.4 KiB
JavaScript
// @flow
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import Piece from "./Piece";
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import ScoreManager from "./ScoreManager";
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import type {coordinates} from './Shapes/BaseShape';
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export type cell = {color: string, isEmpty: boolean};
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export type grid = Array<Array<cell>>;
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/**
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* Class used to manage the game grid
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*
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*/
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export default class GridManager {
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#currentGrid: grid;
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#colors: Object;
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/**
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* Initializes a grid of the given size
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*
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* @param width The grid width
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* @param height The grid height
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* @param colors Object containing current theme colors
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*/
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constructor(width: number, height: number, colors: Object) {
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this.#colors = colors;
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this.#currentGrid = this.getEmptyGrid(height, width);
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}
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/**
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* Get the current grid
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*
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* @return {grid} The current grid
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*/
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getCurrentGrid(): grid {
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return this.#currentGrid;
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}
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/**
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* Get a new empty grid line of the given size
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*
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* @param width The line size
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* @return {Array<cell>}
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*/
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getEmptyLine(width: number): Array<cell> {
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let line = [];
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for (let col = 0; col < width; col++) {
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line.push({
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color: this.#colors.tetrisBackground,
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isEmpty: true,
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});
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}
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return line;
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}
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/**
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* Gets a new empty grid
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*
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* @param width The grid width
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* @param height The grid height
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* @return {grid} A new empty grid
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*/
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getEmptyGrid(height: number, width: number): grid {
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let grid = [];
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for (let row = 0; row < height; row++) {
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grid.push(this.getEmptyLine(width));
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}
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return grid;
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}
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/**
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* Removes the given lines from the grid,
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* shifts down every line on top and adds new empty lines on top.
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*
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* @param lines An array of line numbers to remove
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* @param scoreManager A reference to the score manager
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*/
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clearLines(lines: Array<number>, scoreManager: ScoreManager) {
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lines.sort();
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for (let i = 0; i < lines.length; i++) {
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this.#currentGrid.splice(lines[i], 1);
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this.#currentGrid.unshift(this.getEmptyLine(this.#currentGrid[0].length));
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}
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scoreManager.addLinesRemovedPoints(lines.length);
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}
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/**
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* Gets the lines to clear around the given piece's coordinates.
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* The piece's coordinates are used for optimization and to prevent checking the whole grid.
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*
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* @param coord The piece's coordinates to check lines at
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* @return {Array<number>} An array containing the line numbers to clear
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*/
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getLinesToClear(coord: Array<coordinates>): Array<number> {
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let rows = [];
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for (let i = 0; i < coord.length; i++) {
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let isLineFull = true;
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for (let col = 0; col < this.#currentGrid[coord[i].y].length; col++) {
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if (this.#currentGrid[coord[i].y][col].isEmpty) {
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isLineFull = false;
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break;
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}
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}
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if (isLineFull && rows.indexOf(coord[i].y) === -1)
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rows.push(coord[i].y);
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}
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return rows;
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}
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/**
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* Freezes the given piece to the grid
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*
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* @param currentObject The piece to freeze
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* @param scoreManager A reference to the score manager
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*/
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freezeTetromino(currentObject: Piece, scoreManager: ScoreManager) {
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this.clearLines(this.getLinesToClear(currentObject.getCoordinates()), scoreManager);
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}
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}
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