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657cebfda9
Previously we'd use the remove-markdown package to create the note preview however this function would freeze on certain notes, and was probably unsafe as it used regex to parse Markdown. Replaced this in favour of Markdown-it along with htmlparser2 to strip all markup from a note.
123 lines
3.1 KiB
JavaScript
123 lines
3.1 KiB
JavaScript
const stringPadding = require('string-padding');
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const urlUtils = require('lib/urlUtils');
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const MarkdownIt = require('markdown-it');
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const { setupLinkify } = require('lib/joplin-renderer');
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// Taken from codemirror/addon/edit/continuelist.js
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const listRegex = /^(\s*)([*+-] \[[x ]\]\s|[*+-]\s|(\d+)([.)]\s))(\s*)/;
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const emptyListRegex = /^(\s*)([*+-] \[[x ]\]|[*+-]|(\d+)[.)])(\s*)$/;
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const markdownUtils = {
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// Titles for markdown links only need escaping for [ and ]
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escapeTitleText(text) {
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return text.replace(/(\[|\])/g, '\\$1');
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},
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escapeLinkUrl(url) {
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url = url.replace(/\(/g, '%28');
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url = url.replace(/\)/g, '%29');
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url = url.replace(/ /g, '%20');
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return url;
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},
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prependBaseUrl(md, baseUrl) {
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// eslint-disable-next-line no-useless-escape
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return md.replace(/(\]\()([^\s\)]+)(.*?\))/g, (match, before, url, after) => {
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return before + urlUtils.prependBaseUrl(url, baseUrl) + after;
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});
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},
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extractImageUrls(md) {
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const markdownIt = new MarkdownIt();
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setupLinkify(markdownIt); // Necessary to support file:/// links
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const env = {};
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const tokens = markdownIt.parse(md, env);
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const output = [];
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const searchUrls = tokens => {
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for (let i = 0; i < tokens.length; i++) {
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const token = tokens[i];
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if (token.type === 'image') {
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for (let j = 0; j < token.attrs.length; j++) {
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const a = token.attrs[j];
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if (a[0] === 'src' && a.length >= 2 && a[1]) {
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output.push(a[1]);
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}
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}
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}
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if (token.children && token.children.length) {
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searchUrls(token.children);
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}
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}
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};
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searchUrls(tokens);
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return output;
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},
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// The match results has 5 items
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// Full match array is
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// [Full match, whitespace, list token, ol line number, whitespace following token]
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olLineNumber(line) {
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const match = line.match(listRegex);
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return match ? Number(match[3]) : 0;
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},
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extractListToken(line) {
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const match = line.match(listRegex);
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return match ? match[2] : '';
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},
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isListItem(line) {
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return listRegex.test(line);
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},
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isEmptyListItem(line) {
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return emptyListRegex.test(line);
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},
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createMarkdownTable(headers, rows) {
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const output = [];
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const headersMd = [];
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const lineMd = [];
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for (let i = 0; i < headers.length; i++) {
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const h = headers[i];
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headersMd.push(stringPadding(h.label, 3, ' ', stringPadding.RIGHT));
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lineMd.push('---');
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}
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output.push(headersMd.join(' | '));
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output.push(lineMd.join(' | '));
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for (let i = 0; i < rows.length; i++) {
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const row = rows[i];
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const rowMd = [];
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for (let j = 0; j < headers.length; j++) {
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const h = headers[j];
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const value = h.filter ? h.filter(row[h.name]) : row[h.name];
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rowMd.push(stringPadding(value, 3, ' ', stringPadding.RIGHT));
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}
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output.push(rowMd.join(' | '));
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}
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return output.join('\n');
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},
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titleFromBody(body) {
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if (!body) return '';
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const mdLinkRegex = /!?\[([^\]]+?)\]\(.+?\)/g;
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const emptyMdLinkRegex = /!?\[\]\((.+?)\)/g;
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const filterRegex = /^[# \n\t*`-]*/;
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const lines = body.trim().split('\n');
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const title = lines[0].trim();
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return title.replace(filterRegex, '').replace(mdLinkRegex, '$1').replace(emptyMdLinkRegex, '$1').substring(0,80);
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},
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};
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module.exports = markdownUtils;
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