mirror of
https://github.com/go-gitea/gitea
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cc5ff98e0d
Add more tests
49 lines
1.7 KiB
TypeScript
49 lines
1.7 KiB
TypeScript
import {displayError} from './common.ts';
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function targetElement(el: Element): {target: Element, displayAsBlock: boolean} {
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// The target element is either the parent "code block with loading indicator", or itself
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// It is designed to work for 2 cases (guaranteed by backend code):
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// * <pre class="code-block is-loading"><code class="language-math display">...</code></pre>
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// * <code class="language-math">...</code>
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return {
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target: el.closest('.code-block.is-loading') ?? el,
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displayAsBlock: el.classList.contains('display'),
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};
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}
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export async function renderMath(): Promise<void> {
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const els = document.querySelectorAll('.markup code.language-math');
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if (!els.length) return;
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const [{default: katex}] = await Promise.all([
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import(/* webpackChunkName: "katex" */'katex'),
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import(/* webpackChunkName: "katex" */'katex/dist/katex.css'),
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]);
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const MAX_CHARS = 1000;
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const MAX_SIZE = 25;
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const MAX_EXPAND = 1000;
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for (const el of els) {
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const {target, displayAsBlock} = targetElement(el);
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if (target.hasAttribute('data-render-done')) continue;
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const source = el.textContent;
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if (source.length > MAX_CHARS) {
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displayError(target, new Error(`Math source of ${source.length} characters exceeds the maximum allowed length of ${MAX_CHARS}.`));
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continue;
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}
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try {
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const tempEl = document.createElement(displayAsBlock ? 'p' : 'span');
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katex.render(source, tempEl, {
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maxSize: MAX_SIZE,
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maxExpand: MAX_EXPAND,
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displayMode: displayAsBlock, // katex: true for display (block) mode, false for inline mode
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});
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target.replaceWith(tempEl);
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} catch (error) {
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displayError(target, error);
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}
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}
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}
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