Constellations/js/Grid.js

import size from Config;
import * as CellSet from Geometry.CellSet;
import * as Dom from UnitJS.Dom;
import {at, generate, iter, square} from Grid.Util;
import {diagonal, zero} from Geometry.Vector;

var grid = {
	root: document.getElementById('grid'),
	cells: null,
	colors: null,
	missing: null,
};

return {
	clear: clear,
	get: get,
	init: init,
};

function init(eventHandlers) {
	grid.cells = square(size, function(cell) {
		return Dom.make('td', eventHandlers(cell));
	});
	for(var row = 0; row < size; row++) {
		grid.root.appendChild(Dom.make('tr', {}, grid.cells[row]));
	}
	clear();
}

function clear() {
	grid.colors = square(size);
	grid.missing = CellSet.rectangle(zero(), diagonal(size));
	iter(grid.cells, function(td) {td.className = '';});
}

function get() {
	return grid;
}