mirror of
https://github.com/google/blockly.git
synced 2026-01-05 08:00:09 +01:00
5870c66cf0
* chore: rename .eslintrc.js to eslint.config.js * chore: Rename eslint.config.js to eslint.config.mjs. * refactor: Migrate ESLint config to new flat format. * chore: Remove old per-directory and global ignore ESLint config files. * fix: Allowlist JSDoc tag aliases. * fix: Don't require @license in tests/*. * fix: Add NodeJS globals to several files that run under Node. * chore: Remove now-unneeded ESLint directives in core. * chore: Remove invalid/unneeded ESLint directives. * fix: Fix invalid use of `await` outside of an `async` function. * fix: Improve screenshot error message. * fix: Update ESLint config file to not warn on existing violations. * chore: Remove suppressions of rules that weren't triggering. * chore: Fix package-lock.json.
124 lines
3.4 KiB
JavaScript
124 lines
3.4 KiB
JavaScript
/**
|
|
* @license
|
|
* Copyright 2019 Google LLC
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
/**
|
|
* @fileoverview Download screenshot.
|
|
*/
|
|
'use strict';
|
|
|
|
/**
|
|
* Convert an SVG datauri into a PNG datauri.
|
|
* @param {string} data SVG datauri.
|
|
* @param {number} width Image width.
|
|
* @param {number} height Image height.
|
|
* @param {!Function} callback Callback.
|
|
*/
|
|
function svgToPng_(data, width, height, callback) {
|
|
const canvas = document.createElement('canvas');
|
|
const context = canvas.getContext('2d');
|
|
const img = new Image();
|
|
|
|
const pixelDensity = 10;
|
|
canvas.width = width * pixelDensity;
|
|
canvas.height = height * pixelDensity;
|
|
img.onload = function () {
|
|
context.drawImage(
|
|
img,
|
|
0,
|
|
0,
|
|
width,
|
|
height,
|
|
0,
|
|
0,
|
|
canvas.width,
|
|
canvas.height,
|
|
);
|
|
try {
|
|
const dataUri = canvas.toDataURL('image/png');
|
|
callback(dataUri);
|
|
} catch (err) {
|
|
console.warn('Error converting the workspace svg to a png: ' + err);
|
|
callback('');
|
|
}
|
|
};
|
|
img.src = data;
|
|
}
|
|
|
|
/**
|
|
* Create an SVG of the blocks on the workspace.
|
|
* @param {!Blockly.WorkspaceSvg} workspace The workspace.
|
|
* @param {!Function} callback Callback.
|
|
* @param {string=} customCss Custom CSS to append to the SVG.
|
|
*/
|
|
function workspaceToSvg_(workspace, callback, customCss) {
|
|
// Go through all text areas and set their value.
|
|
const textAreas = document.getElementsByTagName('textarea');
|
|
for (let i = 0; i < textAreas.length; i++) {
|
|
textAreas[i].innerHTML = textAreas[i].value;
|
|
}
|
|
|
|
const bBox = workspace.getBlocksBoundingBox();
|
|
const x = bBox.x || bBox.left;
|
|
const y = bBox.y || bBox.top;
|
|
const width = bBox.width || bBox.right - x;
|
|
const height = bBox.height || bBox.bottom - y;
|
|
|
|
const blockCanvas = workspace.getCanvas();
|
|
const clone = blockCanvas.cloneNode(true);
|
|
clone.removeAttribute('transform');
|
|
|
|
const svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
|
|
svg.setAttribute('xmlns', 'http://www.w3.org/2000/svg');
|
|
svg.appendChild(clone);
|
|
svg.setAttribute('viewBox', x + ' ' + y + ' ' + width + ' ' + height);
|
|
|
|
svg.setAttribute(
|
|
'class',
|
|
'blocklySvg ' +
|
|
(workspace.options.renderer || 'geras') +
|
|
'-renderer ' +
|
|
(workspace.getTheme ? workspace.getTheme().name + '-theme' : ''),
|
|
);
|
|
svg.setAttribute('width', width);
|
|
svg.setAttribute('height', height);
|
|
svg.style.backgroundColor = 'transparent';
|
|
|
|
const css = [].slice
|
|
.call(document.head.querySelectorAll('style'))
|
|
.filter(
|
|
(el) => /\.blocklySvg/.test(el.innerText) || el.id.startsWith('blockly-'),
|
|
)
|
|
.map((el) => el.innerText)
|
|
.join('\n');
|
|
const style = document.createElement('style');
|
|
style.innerHTML = css + '\n' + customCss;
|
|
svg.insertBefore(style, svg.firstChild);
|
|
|
|
let svgAsXML = new XMLSerializer().serializeToString(svg);
|
|
svgAsXML = svgAsXML.replace(/ /g, ' ');
|
|
const data = 'data:image/svg+xml,' + encodeURIComponent(svgAsXML);
|
|
|
|
svgToPng_(data, width, height, callback);
|
|
}
|
|
|
|
/* eslint-disable no-unused-vars */
|
|
/**
|
|
* Download a screenshot of the blocks on a Blockly workspace.
|
|
* @param {!Blockly.WorkspaceSvg} workspace The Blockly workspace.
|
|
*/
|
|
function downloadScreenshot(workspace) {
|
|
workspaceToSvg_(workspace, function (datauri) {
|
|
const a = document.createElement('a');
|
|
a.download = 'screenshot.png';
|
|
a.target = '_self';
|
|
a.href = datauri;
|
|
document.body.appendChild(a);
|
|
a.click();
|
|
a.parentNode.removeChild(a);
|
|
});
|
|
}
|
|
/* eslint-enable */
|