mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-12-23 12:59:11 -05:00
74 lines
2.5 KiB
JavaScript
74 lines
2.5 KiB
JavaScript
import {isDarkTheme} from '../utils.js';
|
|
import {makeCodeCopyButton} from './codecopy.js';
|
|
|
|
const {mermaidMaxSourceCharacters} = window.config;
|
|
|
|
const iframeCss = `
|
|
:root {color-scheme: normal}
|
|
body {margin: 0; padding: 0; overflow: hidden}
|
|
#mermaid {display: block; margin: 0 auto}
|
|
`;
|
|
|
|
function displayError(el, err) {
|
|
el.closest('pre').classList.remove('is-loading');
|
|
const errorNode = document.createElement('div');
|
|
errorNode.setAttribute('class', 'ui message error markup-block-error gt-mono');
|
|
errorNode.textContent = err.str || err.message || String(err);
|
|
el.closest('pre').before(errorNode);
|
|
}
|
|
|
|
export async function renderMermaid() {
|
|
const els = document.querySelectorAll('.markup code.language-mermaid');
|
|
if (!els.length) return;
|
|
|
|
const {default: mermaid} = await import(/* webpackChunkName: "mermaid" */'mermaid');
|
|
|
|
mermaid.initialize({
|
|
startOnLoad: false,
|
|
theme: isDarkTheme() ? 'dark' : 'neutral',
|
|
securityLevel: 'strict',
|
|
});
|
|
|
|
for (const el of els) {
|
|
const source = el.textContent;
|
|
|
|
if (mermaidMaxSourceCharacters >= 0 && source.length > mermaidMaxSourceCharacters) {
|
|
displayError(el, new Error(`Mermaid source of ${source.length} characters exceeds the maximum allowed length of ${mermaidMaxSourceCharacters}.`));
|
|
continue;
|
|
}
|
|
|
|
try {
|
|
await mermaid.parse(source);
|
|
} catch (err) {
|
|
displayError(el, err);
|
|
el.closest('pre').classList.remove('is-loading');
|
|
continue;
|
|
}
|
|
|
|
try {
|
|
// can't use bindFunctions here because we can't cross the iframe boundary. This
|
|
// means js-based interactions won't work but they aren't intended to work either
|
|
const {svg} = await mermaid.render('mermaid', source);
|
|
const heightStr = (svg.match(/viewBox="(.+?)"/) || ['', ''])[1].split(/\s+/)[3];
|
|
if (!heightStr) return displayError(el, new Error('Could not determine chart height'));
|
|
|
|
const iframe = document.createElement('iframe');
|
|
iframe.classList.add('markup-render');
|
|
iframe.sandbox = 'allow-scripts';
|
|
iframe.style.height = `${Math.ceil(parseFloat(heightStr))}px`;
|
|
iframe.srcdoc = `<html><head><style>${iframeCss}</style></head><body>${svg}</body></html>`;
|
|
|
|
const mermaidBlock = document.createElement('div');
|
|
mermaidBlock.classList.add('mermaid-block');
|
|
mermaidBlock.append(iframe);
|
|
|
|
const btn = makeCodeCopyButton();
|
|
btn.setAttribute('data-clipboard-text', source);
|
|
|
|
mermaidBlock.append(btn);
|
|
el.closest('pre').replaceWith(mermaidBlock);
|
|
} catch (err) {
|
|
displayError(el, err);
|
|
}
|
|
}
|
|
}
|