mirror of
https://github.com/laurent22/joplin.git
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229 lines
6.7 KiB
TypeScript
229 lines
6.7 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 enum MarkdownTableJustify {
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Left = 'left',
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Center = 'center',
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Right = 'right,',
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}
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export interface MarkdownTableHeader {
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name: string;
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label: string;
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// eslint-disable-next-line @typescript-eslint/ban-types -- Old code before rule was applied
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filter?: Function;
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disableEscape?: boolean;
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disableHtmlEscape?: boolean;
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justify?: MarkdownTableJustify;
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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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export interface MarkdownTable {
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header: MarkdownTableHeader[];
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rows: MarkdownTableRow[];
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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, escapeHtml = true) {
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// Disable HTML code
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if (escapeHtml) {
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text = text.replace(/</g, '<');
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text = text.replace(/>/g, '>');
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}
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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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escapeInlineCode(text: string): string {
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// https://github.com/github/markup/issues/363#issuecomment-55499909
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return text.replace(/`/g, '``');
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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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extractFileUrls(md: string, onlyType: string = null): 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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let linkType = onlyType;
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if (linkType === 'pdf') linkType = 'link_open';
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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 ((!onlyType && (token.type === 'link_open' || token.type === 'image')) || (!!onlyType && token.type === onlyType) || (onlyType === 'pdf' && token.type === 'link_open')) {
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// Pdf embeds are a special case, they are represented as 'link_open' tokens but are marked with 'embedded_pdf' as link name by the parser
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// We are making sure if its in the proper pdf link format, only then we add it to the list
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if (onlyType === 'pdf' && !(tokens.length > i + 1 && tokens[i + 1].type === 'text' && tokens[i + 1].content === 'embedded_pdf')) continue;
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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[0] === 'href') && 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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replaceResourceUrl(md: string, urlToReplace: string, id: string) {
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const linkRegex = `(?<=\\]\\()\\<?${urlToReplace}\\>?(?=.*\\))`;
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const reg = new RegExp(linkRegex, 'g');
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return md.replace(reg, `:/${id}`);
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},
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extractImageUrls(md: string) {
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return markdownUtils.extractFileUrls(md, 'image');
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},
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extractPdfUrls(md: string) {
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return markdownUtils.extractFileUrls(md, 'pdf');
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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 minCellWidth = 5;
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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, minCellWidth, ' ', stringPadding.RIGHT));
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const justify = h.justify ? h.justify : MarkdownTableJustify.Left;
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if (justify === MarkdownTableJustify.Left) {
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lineMd.push('-----');
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} else if (justify === MarkdownTableJustify.Center) {
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lineMd.push(':---:');
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} else {
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lineMd.push('----:');
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}
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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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const valueMd = h.disableEscape ? value : markdownUtils.escapeTableCell(value, !h.disableHtmlEscape);
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rowMd.push(stringPadding(valueMd, minCellWidth, ' ', 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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countTableColumns(line: string) {
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if (!line) return 0;
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const trimmed = line.trim();
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let pipes = (line.match(/\|/g) || []).length;
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if (trimmed[0] === '|') { pipes -= 1; }
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if (trimmed[trimmed.length - 1] === '|') { pipes -= 1; }
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return pipes + 1;
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},
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matchingTableDivider(header: string, divider: string) {
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if (!header || !divider) return false;
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const invalidChars = divider.match(/[^\s\-:|]/g);
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if (invalidChars) { return false; }
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const columns = markdownUtils.countTableColumns(header);
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const cols = markdownUtils.countTableColumns(divider);
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return cols > 0 && (cols >= columns);
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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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