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* Make Mermaid.js limit configurable Add `MERMAID_MAX_SOURCE_CHARACTERS` to `[markup]` settings to make the maximum size of a mermaid render configurable. Fix #16513 Signed-off-by: Andrew Thornton <art27@cantab.net> * fixup! Make Mermaid.js limit configurable * Update custom/conf/app.example.ini Co-authored-by: silverwind <me@silverwind.io> * Update docs/content/doc/advanced/config-cheat-sheet.en-us.md Co-authored-by: silverwind <me@silverwind.io> Co-authored-by: silverwind <me@silverwind.io> Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
57 lines
1.5 KiB
JavaScript
57 lines
1.5 KiB
JavaScript
const {MermaidMaxSourceCharacters} = window.config;
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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 markup-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 (MermaidMaxSourceCharacters >= 0 && el.textContent.length > MermaidMaxSourceCharacters) {
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displayError(el, new Error(`Mermaid source of ${el.textContent.length} characters exceeds the maximum allowed length of ${MermaidMaxSourceCharacters}.`));
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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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