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Restrict image export size.
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commit
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@ -15,16 +15,15 @@
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* See the License for the specific language governing permissions and
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* limitations under the License.
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*/
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*/
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import { Mindmap } from '../..';
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import Exporter from './Exporter';
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import Exporter from './Exporter';
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import SVGExporter from './SVGExporter';
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import SVGExporter from './SVGExporter';
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/**
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/**
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* Based on https://mybyways.com/blog/convert-svg-to-png-using-your-browser
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* Based on https://mybyways.com/blog/convert-svg-to-png-using-your-browser
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*/
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*/
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class BinaryImageExporter extends Exporter {
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class BinaryImageExporter extends Exporter {
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private svgElement: Element;
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private static maxAllowedSize = 10000;
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private mindmap: Mindmap;
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private svgElement: Element;
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private width: number;
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private width: number;
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@ -32,10 +31,9 @@ class BinaryImageExporter extends Exporter {
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private adjustToFit: boolean;
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private adjustToFit: boolean;
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constructor(mindmap: Mindmap, svgElement: Element, width: number, height: number, imgFormat: 'image/png' | 'image/jpeg', adjustToFit = true) {
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constructor(svgElement: Element, width: number, height: number, imgFormat: 'image/png' | 'image/jpeg', adjustToFit = true) {
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super(imgFormat.split('/')[0], imgFormat);
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super(imgFormat.split('/')[0], imgFormat);
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this.svgElement = svgElement;
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this.svgElement = svgElement;
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this.mindmap = mindmap;
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this.adjustToFit = adjustToFit;
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this.adjustToFit = adjustToFit;
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this.width = width;
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this.width = width;
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this.height = height;
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this.height = height;
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@ -66,6 +64,14 @@ class BinaryImageExporter extends Exporter {
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width = (this.width * dpr);
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width = (this.width * dpr);
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height = (this.height * dpr);
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height = (this.height * dpr);
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}
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}
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// Prevents an image too big. Failures seen during export in couple of browsers
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if (Math.max(width, height) > BinaryImageExporter.maxAllowedSize) {
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const scale = Math.max(width, height) / BinaryImageExporter.maxAllowedSize;
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width /= scale;
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height /= scale;
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}
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canvas.setAttribute('width', width.toFixed(0));
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canvas.setAttribute('width', width.toFixed(0));
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canvas.setAttribute('height', height.toFixed(0));
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canvas.setAttribute('height', height.toFixed(0));
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@ -15,14 +15,13 @@
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* See the License for the specific language governing permissions and
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* limitations under the License.
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*/
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*/
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import { Mindmap } from '../..';
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import BinaryImageExporter from './BinaryImageExporter';
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import BinaryImageExporter from './BinaryImageExporter';
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import Exporter from './Exporter';
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import Exporter from './Exporter';
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import SVGExporter from './SVGExporter';
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import SVGExporter from './SVGExporter';
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type imageType = 'svg' | 'png' | 'jpg';
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type imageType = 'svg' | 'png' | 'jpg';
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class ImageExpoterFactory {
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class ImageExpoterFactory {
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static create(type: imageType, mindmap: Mindmap, svgElement: Element, width: number, height: number, adjustToFit = true): Exporter {
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static create(type: imageType, svgElement: Element, width: number, height: number, adjustToFit = true): Exporter {
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let result: Exporter;
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let result: Exporter;
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switch (type) {
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switch (type) {
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case 'svg': {
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case 'svg': {
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@ -30,11 +29,11 @@ class ImageExpoterFactory {
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break;
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break;
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}
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}
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case 'png': {
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case 'png': {
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result = new BinaryImageExporter(mindmap, svgElement, width, height, 'image/png', adjustToFit);
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result = new BinaryImageExporter(svgElement, width, height, 'image/png', adjustToFit);
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break;
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break;
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}
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}
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case 'jpg': {
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case 'jpg': {
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result = new BinaryImageExporter(mindmap, svgElement, width, height, 'image/jpeg', adjustToFit);
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result = new BinaryImageExporter(svgElement, width, height, 'image/jpeg', adjustToFit);
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break;
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break;
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}
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}
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default:
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default:
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@ -105,7 +105,7 @@ const ExportDialog = ({
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case 'png':
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case 'png':
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case 'jpg':
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case 'jpg':
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case 'svg': {
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case 'svg': {
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exporter = ImageExporterFactory.create(formatType, mindmap, svgElement, size.width, size.height, zoomToFit);
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exporter = ImageExporterFactory.create(formatType, svgElement, size.width, size.height, zoomToFit);
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break;
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break;
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}
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}
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case 'wxml':
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case 'wxml':
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