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Download Blockly.Workspace as SVG or PNG file
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| import Blockly from 'blockly'; | |
| declare interface CustomNode extends Node { | |
| removeAttribute(arg0: string); | |
| } | |
| const DOMURL = window.URL || window.webkitURL; | |
| const getSvgBlob = (workspace: Blockly.WorkspaceSvg) => { | |
| const canvas = workspace.svgBlockCanvas_.cloneNode(true) as CustomNode; | |
| canvas.removeAttribute("transform"); | |
| const css = `<defs><style type="text/css" xmlns="http://www.w3.org/1999/xhtml"><![CDATA[${Blockly.Css.CONTENT.join('')}]]></style></defs>`; | |
| const bboxElement = document.getElementsByClassName("blocklyBlockCanvas")[0] as SVGGraphicsElement; | |
| const bbox = bboxElement.getBBox(); | |
| const content = new XMLSerializer().serializeToString(canvas); | |
| const xml = `<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="${ | |
| bbox.width}" height="${bbox.height}" viewBox=" ${bbox.x} ${bbox.y} ${bbox.width} ${bbox.height}">${ | |
| css}">${content}</svg> | |
| `; | |
| return new Blob([xml], { type: 'image/svg+xml;base64' }); | |
| }; | |
| const download = (url: string, filename: string) => { | |
| const element = document.createElement('a'); | |
| element.href = url; | |
| element.download = filename; | |
| element.click(); | |
| DOMURL.revokeObjectURL(element.href); | |
| }; | |
| export const downloadBlocklySvg = (workspace: Blockly.WorkspaceSvg) => { | |
| download(DOMURL.createObjectURL(getSvgBlob(workspace)), 'blocks.svg'); | |
| }; | |
| export const downloadBlocklyPng = (workspace: Blockly.WorkspaceSvg) => { | |
| const img = new Image(); | |
| img.onload = () => { | |
| const canvas = document.createElement('canvas'); | |
| canvas.width = 800; | |
| canvas.height = 600; | |
| canvas.getContext("2d").drawImage(img, 0, 0); | |
| download(canvas.toDataURL("image/png"), 'blocks.png'); | |
| }; | |
| img.src = DOMURL.createObjectURL(getSvgBlob(workspace)); | |
| }; |
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