[EuiScreenReaderOnly] Add preventCopy prop

[cee-chen]

Summary

closes #6804
reverts #6817 (isFocused workaround should no longer be needed)

This PR adds a preventCopy prop to EuiScreenReaderOnly, and applies said functionality to EuiDataGrid to prevent customers copying data from grabbing the SR information about row/column count.

I recommend, as always, following along by commit to separate out cleanup tasks.

QA

• Go to http://localhost:8030/#/utilities/accessibility
• Copy both lines in the first demo
• Paste into any notepad and confirm the visually hidden text was copied (should have 3 lines)
• Copy both lines in the second demo
• Paste into any notepad and confirm the visually hidden text was not copied (should have 2 lines)

---

• Go to http://localhost:8030/#/tabular-content/data-grid
• Attempt to copy multiple cells worth of data
• Paste it into any textarea or notepad, and confirm just the visible text was copied

General checklist

• Checked in Chrome, Safari, Edge, and Firefox
• Checked for accessibility including keyboard-only and screenreader modes
• Props have proper autodocs (using @default if default values are missing) and playground toggles
• Added documentation
• Added or updated jest and cypress tests
• A changelog entry exists and is marked appropriately

- [ ] Checked in both light and dark modes
- [ ] Checked in mobile
- [ ] Checked Code Sandbox works for any docs examples
- [ ] Checked for breaking changes and labeled appropriately
- [ ] Updated the Figma library counterpart

[cee-chen]

lol F, this works for Firefox and Safari with richtext paste but not Chrome/Edge (only works on plain paste). 💀

https://stackoverflow.com/questions/65021694/user-selectnone-still-part-of-copied-rich-text-in-chrome

https://bugs.chromium.org/p/chromium/issues/detail?id=1083125

Looks like this might be fixed soon on Chromium's end (fingers crossed) 😬 - rather than trying to do JS shenanigans with onCopy, it might be better to wait until a little bit / keep this PR dangling until Chrome pushes a fix

[kibanamachine]

Preview documentation changes for this PR: https://eui.elastic.co/pr_6806/

[1Copenut]

I reviewed the PR and tried out the recommended QA tasks for the EuiScreenReaderOnly and EuiDataGrid components. They worked as expected using the keyboard and VoiceOver on Safari.

I'm okay letting this hang out for a bit if you feel Chromium is going to ship a fix soon. I generally like to ship even partial fixes if it improves the experience for users without degrading it for others. In this case, you've improved the experience for Firefox and Safari users, and AFAIK the experience is the same for Chromium.

[cee-chen]

I'm going to wait for Chromium I think. I guarantee if we release a prop promising to do something that doesn't work quite correctly for the largest market share of browsers, people will be flooding our GitHub issues 😅

[1Copenut]

I'm going to wait for Chromium I think. I guarantee if we release a prop promising to do something that doesn't work quite correctly for the largest market share of browsers, people will be flooding our GitHub issues 😅

Excellent point, this ^^.

[kibanamachine]

Preview documentation changes for this PR: https://eui.elastic.co/pr_6806/

[github-actions]

👋 Hey there. This PR hasn't had any activity for 90 days. We'll automatically close it if that trend continues for another week. If you feel this issue is still valid and needs attention please let us know with a comment.

[cee-chen]

Removing the stale PR label for now in hopes that Chromium eventually fixes the bug 🤞

[github-actions]

👋 Hey there. This PR hasn't had any activity for 90 days. We'll automatically close it if that trend continues for another week. If you feel this issue is still valid and needs attention please let us know with a comment.

[cee-chen]

I'm just gonna move this back to draft since Chromium doesn't appear to be resolving the bug anytime soon. 🥲

[github-actions]

👋 Hey there. This PR hasn't had any activity for 90 days. We'll automatically close it if that trend continues for another week. If you feel this issue is still valid and needs attention please let us know with a comment.

[github-actions]

❌ We're automatically closing this PR due to lack of activity. Please comment if you feel this was done in error.