46 lines
1.4 KiB
JavaScript
46 lines
1.4 KiB
JavaScript
import {AnsiUp} from 'ansi_up';
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const replacements = [
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[/\x1b\[\d+[A-H]/g, ''], // Move cursor, treat them as no-op
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[/\x1b\[\d?[JK]/g, '\r'], // Erase display/line, treat them as a Carriage Return
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];
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// render ANSI to HTML
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export function renderAnsi(line) {
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// create a fresh ansi_up instance because otherwise previous renders can influence
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// the output of future renders, because ansi_up is stateful and remembers things like
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// unclosed opening tags for colors.
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const ansi_up = new AnsiUp();
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ansi_up.use_classes = true;
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if (line.endsWith('\r\n')) {
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line = line.substring(0, line.length - 2);
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} else if (line.endsWith('\n')) {
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line = line.substring(0, line.length - 1);
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}
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if (line.includes('\x1b')) {
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for (const [regex, replacement] of replacements) {
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line = line.replace(regex, replacement);
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}
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}
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if (!line.includes('\r')) {
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return ansi_up.ansi_to_html(line);
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}
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// handle "\rReading...1%\rReading...5%\rReading...100%",
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// convert it into a multiple-line string: "Reading...1%\nReading...5%\nReading...100%"
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const lines = [];
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for (const part of line.split('\r')) {
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if (part === '') continue;
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const partHtml = ansi_up.ansi_to_html(part);
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if (partHtml !== '') {
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lines.push(partHtml);
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}
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}
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// the log message element is with "white-space: break-spaces;", so use "\n" to break lines
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return lines.join('\n');
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}
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