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Viewing file:     getRenderProperties.js (3.67 KB)      -rw-r--r--

"use strict";

Object.defineProperty(exports, "__esModule", {
	value: true
});

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; /* global HTMLImageElement */
/* global HTMLCanvasElement */
/* global SVGElement */

var _getOptionsFromElement = require("./getOptionsFromElement.js");

var _getOptionsFromElement2 = _interopRequireDefault(_getOptionsFromElement);

var _renderers = require("../renderers");

var _renderers2 = _interopRequireDefault(_renderers);

var _exceptions = require("../exceptions/exceptions.js");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

// Takes an element and returns an object with information about how
// it should be rendered
// This could also return an array with these objects
// {
//   element: The element that the renderer should draw on
//   renderer: The name of the renderer
//   afterRender (optional): If something has to done after the renderer
//     completed, calls afterRender (function)
//   options (optional): Options that can be defined in the element
// }

function getRenderProperties(element) {
	// If the element is a string, query select call again
	if (typeof element === "string") {
		return querySelectedRenderProperties(element);
	}
	// If element is array. Recursivly call with every object in the array
	else if (Array.isArray(element)) {
			var returnArray = [];
			for (var i = 0; i < element.length; i++) {
				returnArray.push(getRenderProperties(element[i]));
			}
			return returnArray;
		}
		// If element, render on canvas and set the uri as src
		else if (typeof HTMLCanvasElement !== 'undefined' && element instanceof HTMLImageElement) {
				return newCanvasRenderProperties(element);
			}
			// If SVG
			else if (element && element.nodeName && element.nodeName.toLowerCase() === 'svg' || typeof SVGElement !== 'undefined' && element instanceof SVGElement) {
					return {
						element: element,
						options: (0, _getOptionsFromElement2.default)(element),
						renderer: _renderers2.default.SVGRenderer
					};
				}
				// If canvas (in browser)
				else if (typeof HTMLCanvasElement !== 'undefined' && element instanceof HTMLCanvasElement) {
						return {
							element: element,
							options: (0, _getOptionsFromElement2.default)(element),
							renderer: _renderers2.default.CanvasRenderer
						};
					}
					// If canvas (in node)
					else if (element && element.getContext) {
							return {
								element: element,
								renderer: _renderers2.default.CanvasRenderer
							};
						} else if (element && (typeof element === "undefined" ? "undefined" : _typeof(element)) === 'object' && !element.nodeName) {
							return {
								element: element,
								renderer: _renderers2.default.ObjectRenderer
							};
						} else {
							throw new _exceptions.InvalidElementException();
						}
}

function querySelectedRenderProperties(string) {
	var selector = document.querySelectorAll(string);
	if (selector.length === 0) {
		return undefined;
	} else {
		var returnArray = [];
		for (var i = 0; i < selector.length; i++) {
			returnArray.push(getRenderProperties(selector[i]));
		}
		return returnArray;
	}
}

function newCanvasRenderProperties(imgElement) {
	var canvas = document.createElement('canvas');
	return {
		element: canvas,
		options: (0, _getOptionsFromElement2.default)(imgElement),
		renderer: _renderers2.default.CanvasRenderer,
		afterRender: function afterRender() {
			imgElement.setAttribute("src", canvas.toDataURL());
		}
	};
}

exports.default = getRenderProperties;