import { Scalar } from '../../nodes/Scalar.js'; import { stringifyString } from '../../stringify/stringifyString.js'; const binary = { identify: value => value instanceof Uint8Array, default: false, tag: 'tag:yaml.org,2002:binary', /** * Returns a Buffer in node and an Uint8Array in browsers * * To use the resulting buffer as an image, you'll want to do something like: * * const blob = new Blob([buffer], { type: 'image/jpeg' }) * document.querySelector('#photo').src = URL.createObjectURL(blob) */ resolve(src, onError) { if (typeof Buffer === 'function') { return Buffer.from(src, 'base64'); } else if (typeof atob === 'function') { // On IE 11, atob() can't handle newlines const str = atob(src.replace(/[\n\r]/g, '')); const buffer = new Uint8Array(str.length); for (let i = 0; i < str.length; ++i) buffer[i] = str.charCodeAt(i); return buffer; } else { onError('This environment does not support reading binary tags; either Buffer or atob is required'); return src; } }, stringify({ comment, type, value }, ctx, onComment, onChompKeep) { const buf = value; // checked earlier by binary.identify() let str; if (typeof Buffer === 'function') { str = buf instanceof Buffer ? buf.toString('base64') : Buffer.from(buf.buffer).toString('base64'); } else if (typeof btoa === 'function') { let s = ''; for (let i = 0; i < buf.length; ++i) s += String.fromCharCode(buf[i]); str = btoa(s); } else { throw new Error('This environment does not support writing binary tags; either Buffer or btoa is required'); } if (!type) type = Scalar.BLOCK_LITERAL; if (type !== Scalar.QUOTE_DOUBLE) { const lineWidth = Math.max(ctx.options.lineWidth - ctx.indent.length, ctx.options.minContentWidth); const n = Math.ceil(str.length / lineWidth); const lines = new Array(n); for (let i = 0, o = 0; i < n; ++i, o += lineWidth) { lines[i] = str.substr(o, lineWidth); } str = lines.join(type === Scalar.BLOCK_LITERAL ? '\n' : ' '); } return stringifyString({ comment, type, value: str }, ctx, onComment, onChompKeep); } }; export { binary };