kylin-code/extensions/markdown-math/notebook/katex.ts

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2022-06-14 14:37:10 +08:00
/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import type * as markdownIt from 'markdown-it';
import type { RendererContext } from 'vscode-notebook-renderer';
const styleHref = import.meta.url.replace(/katex.js$/, 'katex.min.css');
export async function activate(ctx: RendererContext<void>) {
const markdownItRenderer = (await ctx.getRenderer('markdownItRenderer')) as undefined | any;
if (!markdownItRenderer) {
throw new Error('Could not load markdownItRenderer');
}
// Add katex styles to be copied to shadow dom
const link = document.createElement('link');
link.rel = 'stylesheet';
link.classList.add('markdown-style');
link.href = styleHref;
// Add same katex style to root document.
// This is needed for the font to be loaded correctly inside the shadow dom.
//
// Seems like https://bugs.chromium.org/p/chromium/issues/detail?id=336876
const linkHead = document.createElement('link');
linkHead.rel = 'stylesheet';
linkHead.href = styleHref;
document.head.appendChild(linkHead);
const style = document.createElement('style');
style.textContent = `
.katex-error {
color: var(--vscode-editorError-foreground);
}
`;
// Put Everything into a template
const styleTemplate = document.createElement('template');
styleTemplate.classList.add('markdown-style');
styleTemplate.content.appendChild(style);
styleTemplate.content.appendChild(link);
document.head.appendChild(styleTemplate);
const katex = require('@iktakahiro/markdown-it-katex');
const macros = {};
markdownItRenderer.extendMarkdownIt((md: markdownIt.MarkdownIt) => {
return md.use(katex, {
globalGroup: true,
enableBareBlocks: true,
macros
});
});
}