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/**
 * @license
 * Copyright (c) 2014 Steven Spungin (TwelveTone LLC)  steven@twelvetone.tv
 *
 * Licensed under the MIT License.
 * http://opensource.org/licenses/mit-license
 */

import { jsPDF } from "../jspdf.js";

/**
 * jsPDF Canvas PlugIn
 * This plugin mimics the HTML5 Canvas
 *
 * The goal is to provide a way for current canvas users to print directly to a PDF.
 * @name canvas
 * @module
 */
(function(jsPDFAPI) {
  "use strict";

/**
   * @class Canvas
   * @classdesc A Canvas Wrapper for jsPDF
   */
  var Canvas = function() {
    var jsPdfInstance = undefined;
    Object.defineProperty(this, "pdf", {
      get: function() {
        return jsPdfInstance;
      },
      set: function(value) {
        jsPdfInstance = value;
      }
    });

var _style = {};
    Object.defineProperty(this, "style", {
      get: function() {
        return _style;
      },
      set: function(value) {
        _style = value;
      }
    });

Object.defineProperty(this, "parentNode", {});
  };

/**
   * The getContext() method returns a drawing context on the canvas, or null if the context identifier is not supported.
   *
   * @name getContext
   * @function
   * @param {string} contextType Is a String containing the context identifier defining the drawing context associated to the canvas. Possible value is "2d", leading to the creation of a Context2D object representing a two-dimensional rendering context.
   * @param {object} contextAttributes
   */
  Canvas.prototype.getContext = function(contextType, contextAttributes) {
    contextType = contextType || "2d";
    var key;

if (contextType !== "2d") {
      return null;
    }
    for (key in contextAttributes) {
      if (this.pdf.context2d.hasOwnProperty(key)) {
        this.pdf.context2d[key] = contextAttributes[key];
      }
    }
    this.pdf.context2d._canvas = this;
    return this.pdf.context2d;
  };

/**
   * The toDataURL() method is just a stub to throw an error if accidently called.
   *
   * @name toDataURL
   * @function
   */
  Canvas.prototype.toDataURL = function() {
    throw new Error("toDataURL is not implemented.");
  };

jsPDFAPI.events.push([
    "initialized",
    function() {
      this.canvas = new Canvas();
      this.canvas.pdf = this;
    }
  ]);

return this;
})(jsPDF.API);