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import { lowlight } from 'lowlight/lib/core';
import { textblockTypeInputRule } from '@tiptap/core';
import { base64DecodeUnicode } from '~/lib/utils/text_utility';
import { PARSE_HTML_PRIORITY_HIGHEST } from '../constants';
import languageLoader from '../services/code_block_language_loader';
import CodeBlockHighlight from './code_block_highlight';
const backtickInputRegex = /^```(mermaid|plantuml)[\s\n]$/;
export default CodeBlockHighlight.extend({
name: 'diagram',
isolating: true,
addOptions() {
return {
lowlight,
};
},
addAttributes() {
return {
language: {
default: null,
parseHTML: (element) => {
return element.dataset.diagram;
},
},
isDiagram: {
default: true,
},
showPreview: {
default: true,
},
};
},
parseHTML() {
return [
{
priority: PARSE_HTML_PRIORITY_HIGHEST,
tag: 'pre[lang="mermaid"]',
getAttrs: () => ({ language: 'mermaid' }),
},
{
priority: PARSE_HTML_PRIORITY_HIGHEST,
tag: '[data-diagram]',
getContent(element, schema) {
const source = base64DecodeUnicode(
element.dataset.diagramSrc.replace('data:text/plain;base64,', ''),
);
const node = schema.node('paragraph', {}, [schema.text(source)]);
return node.content;
},
},
];
},
renderHTML({ HTMLAttributes: { language, ...HTMLAttributes } }) {
return [
'div',
[
'pre',
{
language,
class: `content-editor-code-block code highlight`,
...HTMLAttributes,
},
['code', {}, 0],
],
];
},
addCommands() {
return {};
},
addInputRules() {
const getAttributes = (match) => languageLoader?.loadLanguageFromInputRule(match) || {};
return [
textblockTypeInputRule({
find: backtickInputRegex,
type: this.type,
getAttributes,
}),
];
},
});
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