svgedit/dist/extensions/imagelib/index.js

(function () {
  'use strict';

  var _extends = Object.assign || function (target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i];

      for (var key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
          target[key] = source[key];
        }
      }
    }

    return target;
  };

  /* globals jQuery */
  var $ = jQuery;
  $('a').click(function () {
    var href = this.href;

    var target = window.parent;
    var post = function post(message) {
      // Todo: Make origin customizable as set by opening window
      // Todo: If dropping IE9, avoid stringifying
      target.postMessage(JSON.stringify(_extends({
        namespace: 'imagelib'
      }, message)), '*');
    };
    // Convert Non-SVG images to data URL first
    // (this could also have been done server-side by the library)
    // Send metadata (also indicates file is about to be sent)
    post({
      name: $(this).text(),
      id: href
    });
    if (!href.includes('.svg')) {
      var img = new Image();
      img.onload = function () {
        var canvas = document.createElement('canvas');
        canvas.width = this.width;
        canvas.height = this.height;
        // load the raster image into the canvas
        canvas.getContext('2d').drawImage(this, 0, 0);
        // retrieve the data: URL
        var data = void 0;
        try {
          data = canvas.toDataURL();
        } catch (err) {
          // This fails in Firefox with `file:///` URLs :(
          alert('Data URL conversion failed: ' + err);
          data = '';
        }
        post({ href: href, data: data });
      };
      img.src = href;
    } else {
      // Do ajax request for image's href value
      $.get(href, function (data) {
        post({ href: href, data: data });
      }, 'html'); // 'html' is necessary to keep returned data as a string
    }
    return false;
  });

}());