# Source: objects/Pattern.js

    import {Object2D} from "../Object2D.js";
    import {Box2} from "../math/Box2.js";

    /**
     * Pattern object draw a image repeated as a pattern.
     *
     * Its similar to the Image class but the image can be repeat infinitely.
     *
     * @class
     * @extends {Object2D}
     * @param {string} src Source image URL.
     */
    function Pattern(src)
    {
    	Object2D.call(this);

    	/**
    	 * Box object containing the size of the object.
    	 *
    	 * @type {Box2}
    	 */
    	this.box = new Box2();

    	/**
    	 * Image source DOM element. Used as a source for the pattern image.
    	 *
    	 * This element can be replaced by one of other type (e.g canvas, video).
    	 *
    	 * @type {Element}
    	 */
    	this.image = document.createElement("img");

    	/**
    	 * Repetition indicates how the pattern image should be repeated.
    	 *
    	 * Possible values are "repeat", "repeat-x", "repeat-y" or "no-repeat".
    	 *
    	 * More information about this attribute here https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/createPattern.
    	 *
    	 * @type {string}
    	 */
    	this.repetition = "repeat"

    	if(src !== undefined)
    	{
    		this.setImage(src);
    	}
    }

    Pattern.prototype = Object.create(Object2D.prototype);
    Pattern.prototype.constructor = Pattern;
    Pattern.prototype.type = "Pattern";
    Object2D.register(Pattern, "Pattern");

    /**
     * Set the image source of the object. Can be anything accepted by the src field of an img element.
     *
     * Automatically sets the box size to match the image.
     *
     * @param {string} src Image source string.
     */
    Pattern.prototype.setImage = function(src)
    {
    	var self = this;

    	this.image.onload = function()
    	{
    		self.box.min.set(0, 0);
    		self.box.max.set(this.naturalWidth, this.naturalHeight);
    	};
    	this.image.src = src;
    };

    Pattern.prototype.isInside = function(point)
    {
    	return this.box.containsPoint(point);
    };

    Pattern.prototype.draw = function(context, viewport, canvas)
    {
    	var width = this.box.max.x - this.box.min.x;
    	var height = this.box.max.y - this.box.min.y;

    	if(this.image.src.length > 0)
    	{
    		var pattern = context.createPattern(this.image, this.repetition);

    		context.fillStyle = pattern;
    		context.fillRect(this.box.min.x, this.box.min.y, width, height);
    	}
    };

    Pattern.prototype.serialize = function(recursive)
    {
    	var data = Object2D.prototype.serialize.call(this, recursive);

    	data.box = this.box.toArray();
    	data.image = this.image.src;
    	data.repetition = this.repetition;

    	return data;
    };

    Pattern.prototype.parse = function(data, root)
    {
    	Object2D.prototype.parse.call(this, data, root);

    	this.box.fromArray(data.box);
    	this.image.src = data.image;
    	this.repetition = data.repetition;
    };

    export {Pattern};