126 lines
3.4 KiB
JavaScript
126 lines
3.4 KiB
JavaScript
import { SIDE_LEFT, SIDE_RIGHT } from './constants';
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import { languages } from 'monaco-editor';
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import { flatten } from 'lodash';
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const toLowerCase = x => x.toLowerCase();
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const monacoLanguages = languages.getLanguages();
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const monacoExtensions = new Set(
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flatten(monacoLanguages.map(lang => lang.extensions?.map(toLowerCase) || [])),
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);
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const monacoMimetypes = new Set(
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flatten(monacoLanguages.map(lang => lang.mimetypes?.map(toLowerCase) || [])),
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);
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const monacoFilenames = new Set(
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flatten(monacoLanguages.map(lang => lang.filenames?.map(toLowerCase) || [])),
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);
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const KNOWN_TYPES = [
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{
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isText: false,
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isMatch(mimeType) {
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return mimeType.toLowerCase().includes('image/');
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},
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},
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{
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isText: true,
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isMatch(mimeType) {
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return mimeType.toLowerCase().includes('text/');
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},
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},
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{
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isText: true,
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isMatch(mimeType, fileName) {
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const fileExtension = fileName.includes('.') ? `.${fileName.split('.').pop()}` : '';
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return (
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monacoExtensions.has(fileExtension.toLowerCase()) ||
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monacoMimetypes.has(mimeType.toLowerCase()) ||
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monacoFilenames.has(fileName.toLowerCase())
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);
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},
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},
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];
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export function isTextFile(content, mimeType, fileName) {
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const knownType = KNOWN_TYPES.find(type => type.isMatch(mimeType, fileName));
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if (knownType) return knownType.isText;
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// does the string contain ascii characters only (ranges from space to tilde, tabs and new lines)
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const asciiRegex = /^[ -~\t\n\r]+$/;
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// for unknown types, determine the type by evaluating the file contents
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return asciiRegex.test(content);
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}
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export const createPathWithExt = p => {
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const ext = p.lastIndexOf('.') >= 0 ? p.substring(p.lastIndexOf('.') + 1) : '';
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return `${p.substring(1, p.lastIndexOf('.') + 1 || p.length)}${ext || '.js'}`;
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};
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export const trimPathComponents = path =>
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path
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.split('/')
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.map(s => s.trim())
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.join('/');
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export function registerLanguages(def, ...defs) {
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if (defs.length) defs.forEach(lang => registerLanguages(lang));
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const languageId = def.id;
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languages.register(def);
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languages.setMonarchTokensProvider(languageId, def.language);
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languages.setLanguageConfiguration(languageId, def.conf);
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}
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export const otherSide = side => (side === SIDE_RIGHT ? SIDE_LEFT : SIDE_RIGHT);
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export function trimTrailingWhitespace(content) {
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return content.replace(/[^\S\r\n]+$/gm, '');
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}
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export function insertFinalNewline(content, eol = '\n') {
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return content.slice(-eol.length) !== eol ? `${content}${eol}` : content;
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}
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export function getPathParents(path, maxDepth = Infinity) {
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const pathComponents = path.split('/');
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const paths = [];
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let depth = 0;
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while (pathComponents.length && depth < maxDepth) {
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pathComponents.pop();
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let parentPath = pathComponents.join('/');
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if (parentPath.startsWith('/')) parentPath = parentPath.slice(1);
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if (parentPath) paths.push(parentPath);
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depth += 1;
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}
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return paths;
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}
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export function getPathParent(path) {
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return getPathParents(path, 1)[0];
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}
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/**
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* Takes a file object and returns a data uri of its contents.
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*
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* @param {File} file
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*/
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export function readFileAsDataURL(file) {
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return new Promise(resolve => {
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const reader = new FileReader();
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reader.addEventListener('load', e => resolve(e.target.result), { once: true });
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reader.readAsDataURL(file);
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});
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}
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export function getFileEOL(content = '') {
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return content.includes('\r\n') ? 'CRLF' : 'LF';
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}
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