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131 lines
3.9 KiB
JavaScript
131 lines
3.9 KiB
JavaScript
/*
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To add a new language to highlight:
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1. Add language in babel in package.json
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2. Add new import statement in `components/cmeditor/vjcmeditor.js`
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3. Add new import statement in `components/scratchpad/ScratchpadEditorContainer.js`
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4. Add new meta data in `components/highlighter/meta.js`
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*/
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import Prism from 'prismjs';
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import Clipboard from 'clipboard';
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import Notification from 'vj/components/notification/index';
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import i18n from 'vj/utils/i18n';
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import languageMeta from './meta';
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const languageExtMap = {};
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// Map possible language names to Prism language name
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languageMeta.forEach((meta) => {
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for (let i = 0; i < meta.ext.length; ++i) {
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if (Prism.languages[meta.ext[i]] !== undefined) {
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// eslint-disable-next-line no-param-reassign
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meta.target = meta.ext[i];
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break;
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}
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}
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meta.ext.forEach((ext) => {
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languageExtMap[ext] = meta.target;
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});
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});
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// Copy to Clipboard
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try {
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Prism.plugins.toolbar.registerButton('copy-to-clipboard', (env) => {
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const linkCopy = document.createElement('a');
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linkCopy.href = 'javascript:;'; // eslint-disable-line no-script-url
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linkCopy.textContent = 'Copy';
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const clip = new Clipboard(linkCopy, { text: () => env.code });
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clip.on('success', () => {
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Notification.success(i18n('Content copied to clipboard!'), 1000);
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});
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clip.on('error', () => {
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Notification.error(i18n('Copy failed :('));
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});
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return linkCopy;
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});
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} catch (e) {
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// snowpack
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}
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const invisibles = {
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tab: /\t/,
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crlf: /\r\n/,
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lf: /\n/,
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cr: /\r/,
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space: / /,
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};
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function addInvisibles(grammar) {
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if (!grammar || grammar.tab) return;
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for (const name in invisibles) {
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if (Object.prototype.hasOwnProperty.call(invisibles, name)) {
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grammar[name] = invisibles[name];
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}
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}
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for (const name in grammar) {
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if (Object.prototype.hasOwnProperty.call(grammar, name) && !invisibles[name]) {
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if (name === 'rest') addInvisibles(grammar.rest);
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else handlerInvisiblesToken(grammar, name); // eslint-disable-line no-use-before-define
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}
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}
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}
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function handlerInvisiblesToken(tokens, name) {
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const value = tokens[name];
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const type = Prism.util.type(value);
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if (type === 'RegExp') {
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const inside = {};
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tokens[name] = { pattern: value, inside };
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addInvisibles(inside);
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} else if (type === 'Array') {
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for (let i = 0, l = value.length; i < l; i++) handlerInvisiblesToken(value, i);
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} else {
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const inside = value.inside || (value.inside = {});
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addInvisibles(inside);
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}
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}
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Prism.hooks.add('before-highlight', (env) => {
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console.log(UserContext.showInvisibleChar);
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if (UserContext.showInvisibleChar) addInvisibles(env.grammar);
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});
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const prismjsApiWrap = {
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highlightBlocks: ($dom, format) => {
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$dom.find('pre code').get().forEach((code) => {
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const $code = $(code);
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const $pre = $code.parent();
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$pre.addClass('syntax-hl');
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if ($pre.closest('[data-syntax-hl-show-line-number]')) {
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$pre.addClass('line-numbers');
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}
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const language = ($(code).attr('class') || '').trim();
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const astyle = language.match(/astyle-([a-z]+)/);
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if (format && astyle && astyle[1]) {
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const [success, result] = format($code.text(), `${UserContext.astyleOptions.trim()} mode=${astyle[1]}`);
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console.log(success.result);
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code.original = $code.text();
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if (!success) Notification.error('Code format fail');
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else $code.text(result);
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}
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// try to map the language name
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const m = language.match(/language-([a-z]+)/);
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if (m && m[1]) {
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const languageName = m[1].toLowerCase();
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if (languageExtMap[languageName]) {
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$(code).attr('class', `language-${languageExtMap[languageName]}`);
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}
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}
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Prism.highlightElement(code);
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});
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},
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highlight: (text, grammar, language) => Prism.highlight(text, grammar, language),
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Prism,
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};
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export default prismjsApiWrap;
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