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152 lines
4.1 KiB
TypeScript
152 lines
4.1 KiB
TypeScript
import { validateLinks } from '@joplin/renderer';
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const stringPadding = require('string-padding');
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const urlUtils = require('./urlUtils');
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const MarkdownIt = require('markdown-it');
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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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export interface MarkdownTableHeader {
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name: string;
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label: string;
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filter?: Function;
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}
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export interface MarkdownTableRow {
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[key: string]: string;
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}
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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: string) {
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return text.replace(/(\[|\])/g, '\\$1');
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},
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escapeLinkUrl(url: string) {
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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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escapeTableCell(text: string) {
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// Disable HTML code
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text = text.replace(/</g, '<');
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text = text.replace(/>/g, '>');
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// Table cells can't contain new lines so replace with <br/>
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text = text.replace(/\n/g, '<br/>');
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// "|" is a reserved characters that should be escaped
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text = text.replace(/\|/g, '\\|');
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return text;
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},
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unescapeLinkUrl(url: string) {
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url = url.replace(/%28/g, '(');
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url = url.replace(/%29/g, ')');
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url = url.replace(/%20/g, ' ');
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return url;
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},
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prependBaseUrl(md: string, baseUrl: string) {
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// eslint-disable-next-line no-useless-escape
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return md.replace(/(\]\()([^\s\)]+)(.*?\))/g, (_match: any, before: string, url: string, after: string) => {
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return before + urlUtils.prependBaseUrl(url, baseUrl) + after;
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});
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},
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// Returns the **encoded** URLs, so to be useful they should be decoded again before use.
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extractImageUrls(md: string) {
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const markdownIt = new MarkdownIt();
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markdownIt.validateLink = validateLinks; // 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: string[] = [];
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const searchUrls = (tokens: any[]) => {
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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: string) {
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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: string) {
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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: string) {
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return listRegex.test(line);
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},
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isEmptyListItem(line: string) {
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return emptyListRegex.test(line);
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},
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createMarkdownTable(headers: MarkdownTableHeader[], rows: MarkdownTableRow[]): string {
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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 valueMd = markdownUtils.escapeTableCell(h.filter ? h.filter(row[h.name]) : row[h.name]);
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rowMd.push(stringPadding(valueMd, 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: string) {
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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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export default markdownUtils;
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