@atlaskit/editor-plugin-code-block-advanced/dist/es2019/nodeviews/languages/loader.js

CodeBlockAdvanced plugin for @atlaskit/editor-core

import _defineProperty from "@babel/runtime/helpers/defineProperty";
import { syntaxHighlighting } from '@codemirror/language';
import { languageStyling } from '../../ui/syntaxHighlightingTheme';
import { mapLanguageToCodeMirror } from './languageMap';

/**
 * Manages loading the languages (for syntax highlighting, etc.)
 * from CodeMirror and updating the language in the CodeMirror view
 */
export class LanguageLoader {
  constructor(updateLanguageCompartment) {
    _defineProperty(this, "languageName", '');
    this.updateLanguageCompartment = updateLanguageCompartment;
  }
  async updateLanguage(languageName) {
    if (languageName === this.languageName) {
      return;
    }
    const language = mapLanguageToCodeMirror(languageName);
    const configureEmpty = () => {
      if (this.languageName) {
        this.updateLanguageCompartment([]);
      }
      this.languageName = '';
    };
    if (!language) {
      configureEmpty();
      return;
    }
    try {
      const lang = await language.load();
      if (lang) {
        const styling = languageStyling(lang.language);
        if (styling) {
          this.updateLanguageCompartment([lang, syntaxHighlighting(styling)]);
        } else {
          this.updateLanguageCompartment(lang);
        }
        this.languageName = languageName;
      } else {
        configureEmpty();
      }
    } catch (e) {
      configureEmpty();
    }
  }
}