open-webui/src/lib/components/chat/Messages/CodeBlock.svelte

<script lang="ts">
	import { copyToClipboard } from '$lib/utils';
	import hljs from 'highlight.js';
	import 'highlight.js/styles/github-dark.min.css';
	import { tick } from 'svelte';

	export let id = '';

	export let lang = '';
	export let code = '';

	let executed = false;
	let copied = false;

	const copyCode = async () => {
		copied = true;
		await copyToClipboard(code);

		setTimeout(() => {
			copied = false;
		}, 1000);
	};

	const executePython = async (text) => {
		executed = true;

		await tick();
		const outputDiv = document.getElementById(`code-output-${id}`);

		if (outputDiv) {
			outputDiv.innerText = 'Running...';
		}

		// pyscript
		let div = document.createElement('div');
		let html = `<py-script type="py" worker>
import js
import sys
import io

# Create a StringIO object to capture the output
output_capture = io.StringIO()

# Save the current standard output
original_stdout = sys.stdout

# Replace the standard output with the StringIO object
sys.stdout = output_capture

${text}

# Restore the original standard output
sys.stdout = original_stdout

# Retrieve the captured output
captured_output = "[NO OUTPUT]"
captured_output = output_capture.getvalue()

# Print the captured output
print(captured_output)

def display_message():
    output_div = js.document.getElementById("code-output-${id}")
    output_div.innerText = captured_output

display_message()
			</py-script>`;

		div.innerHTML = html;
		const pyScript = div.firstElementChild;
		try {
			document.body.appendChild(pyScript);
			setTimeout(() => {
				document.body.removeChild(pyScript);
			}, 0);
		} catch (error) {
			console.error('Python error:');
			console.error(error);
		}
	};

	$: highlightedCode = code ? hljs.highlightAuto(code, hljs.getLanguage(lang)?.aliases).value : '';
</script>

{#if code}
	<div class="mb-4">
		<div
			class="flex justify-between bg-[#202123] text-white text-xs px-4 pt-1 pb-0.5 rounded-t-lg overflow-x-auto"
		>
			<div class="p-1">{@html lang}</div>

			<div class="flex items-center">
				{#if lang === 'python'}
					<button
						class="copy-code-button bg-none border-none p-1"
						on:click={() => {
							executePython(code);
						}}>Run</button
					>
				{/if}
				<button class="copy-code-button bg-none border-none p-1" on:click={copyCode}
					>{copied ? 'Copied' : 'Copy Code'}</button
				>
			</div>
		</div>

		<pre
			class=" hljs p-4 px-5 overflow-x-auto"
			style="border-top-left-radius: 0px; border-top-right-radius: 0px; {executed &&
				'border-bottom-left-radius: 0px; border-bottom-right-radius: 0px;'}"><code
				class="language-{lang} rounded-t-none whitespace-pre">{@html highlightedCode || code}</code
			></pre>

		{#if executed}
			<div class="bg-[#202123] text-white px-4 py-4 rounded-b-lg">
				<div class=" text-gray-500 text-sm mb-1">STDOUT/STDERR</div>
				<div id="code-output-{id}" class="text-sm" />
			</div>
		{/if}
	</div>
{/if}