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filter out hidden elements when copying code #13256

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Merged
schultek merged 2 commits into from
Apr 8, 2026
+19 −10
Merged

filter out hidden elements when copying code #13256

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filter out hidden elements when copying code
schultek Apr 7, 2026
2511c9c
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schultek Apr 7, 2026
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29 changes: 19 additions & 10 deletions site/lib/src/components/common/client/copy_button.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,6 @@
// found in the LICENSE file.

import 'package:jaspr/jaspr.dart';

import 'package:universal_web/web.dart' as web;

import '../button.dart';
Expand All @@ -30,23 +29,33 @@ class _CopyButtonState extends State<CopyButton> {
String? content;
bool _copied = false;

static final RegExp _terminalReplacementPattern = RegExp(
r'^(\s*\$\s*)|(PS\s+)?(C:\\(.*)>\s*)',
multiLine: true,
);

@override
void initState() {
if (kIsWeb) {
// Extract the code content and unhide the copy button on the client.
context.binding.addPostFrameCallback(() {
setState(() {
content = buttonKey.currentNode
final codeElement = buttonKey.currentNode
?.closest('.code-block-wrapper')
?.querySelector('pre code')
?.textContent
?.replaceAll(_terminalReplacementPattern, '')
.replaceAll('\u200B', ''); // Remove zero-width spaces
?.cloneNode(true);
if (codeElement == null) return;

// Filter out hidden elements like the terminal sign or folding icons.
final iterator = web.document.createNodeIterator(
codeElement,
/* NodeFilter.SHOW_ELEMENT */ 1,
);
web.Node? currentNode;
while ((currentNode = iterator.nextNode()) != null) {
final element = currentNode as web.Element;
if (element.getAttribute('aria-hidden') == 'true') {
element.remove();
}
}

// Remove zero-width spaces
content = codeElement.textContent?.replaceAll('\u200B', '');
});

assert(
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