Fix safari icons support

packages/mindplot/src/components/Designer.js

@@ -36,7 +36,7 @@ import DragManager from './DragManager';
 import RelationshipPivot from './RelationshipPivot';
 import Relationship from './Relationship';
 import SVGExporter from './export/SVGExporter';
-import PNGExporter from './export/PNGExporter';
+import BinaryImageExporter from './export/PNGExporter';
 
 import TopicEventDispatcher, { TopicEvent } from './TopicEventDispatcher';
 import TopicFeatureFactory from './TopicFeature';
@@ -369,7 +369,11 @@ class Designer extends Events {
         break;
       }
       case 'png': {
-        exporter = new PNGExporter(mindmap, svgElement, size.width, size.height);
+        exporter = new BinaryImageExporter(mindmap, svgElement, size.width, size.height, 'image/png');
+        break;
+      }
+      case 'jpeg': {
+        exporter = new BinaryImageExporter(mindmap, svgElement, size.width, size.height, 'image/jpeg');
         break;
       }
       default:

packages/mindplot/src/components/export/PNGExporter.ts

@@ -2,16 +2,21 @@
 import { Mindmap } from "../..";
 import Exporter from "./Exporter";
 import SVGExporter from "./SVGExporter";
-
+/**
-class PNGExporter implements Exporter {
+ * Based on https://mybyways.com/blog/convert-svg-to-png-using-your-browser
+ */
+class BinaryImageExporter implements Exporter {
     svgElement: Element;
     mindmap: Mindmap;
     width: number;
     height: number;
+    imgFormat: string;
 
-    constructor(mindmap: Mindmap, svgElement: Element, width: number, height: number) {
+    constructor(mindmap: Mindmap, svgElement: Element, width: number, height: number, imgFormat: 'image/png' | 'image/jpeg') {
         this.svgElement = svgElement;
         this.mindmap = mindmap;
+        this.imgFormat = imgFormat;
+
         this.width = width;
         this.height = height;
     }
@@ -20,18 +25,27 @@ class PNGExporter implements Exporter {
         const svgExporter = new SVGExporter(this.mindmap, this.svgElement);
         const svgUrl = await svgExporter.export();
         
+        // Get the device pixel ratio, falling back to 1. But, I will double the resolution to look nicer.
+        const dpr = (window.devicePixelRatio || 1) * 2;
+        
         // Create canvas ...
         const canvas = document.createElement('canvas');
-        canvas.setAttribute('width', this.width.toString());
+        canvas.setAttribute('width', (this.width * dpr).toString() );
-        canvas.setAttribute('height', this.height.toString());
+        canvas.setAttribute('height', (this.height * dpr).toString());
 
         // Render the image and wait for the response ...
         const img = new Image();
         const result = new Promise<string>((resolve, reject) => {
 
             img.onload = () => {
-                canvas.getContext('2d').drawImage(img, 0, 0);
+                const ctx = canvas.getContext('2d');
-                const imgDataUri = canvas.toDataURL('image/png').replace('image/png', 'octet/stream');
+                // Scale for retina ...
+                ctx.scale(dpr, dpr);
+                ctx.drawImage(img, 0, 0);
+
+                const imgDataUri = canvas
+                    .toDataURL(this.imgFormat)
+                    .replace('image/png', 'octet/stream');
                 URL.revokeObjectURL(imgDataUri);
                 resolve(imgDataUri);
             }
@@ -40,4 +54,4 @@ class PNGExporter implements Exporter {
         return result;
     }
 }
-export default PNGExporter;
+export default BinaryImageExporter;

packages/mindplot/src/components/export/SVGExporter.ts

@@ -11,13 +11,17 @@ class SVGExporter implements Exporter {
     export(): Promise<string> {
         // Replace all images for in-line images ...
         const imagesElements: HTMLCollection = this.svgElement.getElementsByTagName('image');
-        let svgTxt:string = new XMLSerializer().serializeToString(this.svgElement);
+        let svgTxt:string = new XMLSerializer()
+            .serializeToString(this.svgElement);
 
         // Are namespace declared ?. Otherwise, force the declaration ...
         if(svgTxt.indexOf('xmlns:xlink=')!==-1){
-            svgTxt.replace('<svg ', '<svg xmlns:xlink="http://www.w3.org/1999/xlink" ')
+            svgTxt = svgTxt.replace('<svg ', '<svg xmlns:xlink="http://www.w3.org/1999/xlink" ')
         }
 
+        // Add white background. This is mainly for PNG export ...
+        svgTxt = svgTxt.replace('<svg ', '<svg style="background-color:white" ');        
+
         const blob = new Blob([svgTxt], { type: 'image/svg+xml' });
         const result = URL.createObjectURL(blob);
         return Promise.resolve(result);

packages/mindplot/src/components/widget/Menu.js

@@ -213,7 +213,9 @@ class Menu extends IMenu {
 
     this._addButton('export', false, false, () => {
       const formatType = 'png';
-      designer.export(formatType).then((url) => {
+
+      designer.export(formatType)
+        .then((url) => {
           // Create hidden anchor to force download ...
           const anchor = document.createElement('a');
           anchor.style = 'display: none';

packages/mindplot/test/unit/export/SVGExporterTestSuite.test.ts

@@ -3,7 +3,7 @@ import fs from 'fs';
 import path from 'path';
 import XMLSerializerFactory from '../../../src/components/persistence/XMLSerializerFactory';
 import SVGExporter from '../../../src/components/export/SVGExporter';
-import PNGExporter from '../../../src/components/export/PNGExporter';
+import BinaryImageExporter from '../../../src/components/export/PNGExporter';
 
 test('mindplot generation of simple maps', async () => {
   // Load mindmap DOM ...