e61c09ed73
- Add loading spinners on editor and mermaid renderers - Add error handling and inline error box for mermaid - Fix Mermaid rendering by using the .init api
56 lines
1.4 KiB
JavaScript
56 lines
1.4 KiB
JavaScript
const MAX_SOURCE_CHARACTERS = 5000;
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function displayError(el, err) {
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el.closest('pre').classList.remove('is-loading');
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const errorNode = document.createElement('div');
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errorNode.setAttribute('class', 'ui message error markdown-block-error mono');
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errorNode.textContent = err.str || err.message || String(err);
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el.closest('pre').before(errorNode);
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}
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export async function renderMermaid(els) {
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if (!els || !els.length) return;
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const mermaid = await import(/* webpackChunkName: "mermaid" */'mermaid');
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mermaid.initialize({
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mermaid: {
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startOnLoad: false,
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},
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flowchart: {
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useMaxWidth: true,
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htmlLabels: false,
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},
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theme: 'neutral',
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securityLevel: 'strict',
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});
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for (const el of els) {
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if (el.textContent.length > MAX_SOURCE_CHARACTERS) {
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displayError(el, new Error(`Mermaid source of ${el.textContent.length} characters exceeds the maximum allowed length of ${MAX_SOURCE_CHARACTERS}.`));
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continue;
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}
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let valid;
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try {
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valid = mermaid.parse(el.textContent);
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} catch (err) {
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displayError(el, err);
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}
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if (!valid) {
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el.closest('pre').classList.remove('is-loading');
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continue;
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}
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try {
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mermaid.init(undefined, el, (id) => {
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const svg = document.getElementById(id);
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svg.classList.add('mermaid-chart');
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svg.closest('pre').replaceWith(svg);
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});
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} catch (err) {
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displayError(el, err);
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}
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}
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}
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