fix(Textarea): resolve row count calculation errors caused by scrollbar

[Mini-ghost]

🔗 Linked issue

N/A

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

In the current version, <UTextarea> does not close the scrollbar when calculating the number of rows, which causes a slight inaccuracy, resulting in an extra row being added even when there is still enough space.

2024-08-14.6.51.09.mov

This PR attempts to address this by applying overflow: hidden before each row calculation and restoring the original setting afterward. This should help eliminate the minor inaccuracies caused by the scrollbar during the calculation process.

2024-08-14.7.19.07.mov

If there are any aspects that I haven't considered thoroughly, please do let me know. I sincerely appreciate your guidance and assistance.

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[romhml]

Hi! I'm not able to reproduce the original issue, would you mind sharing a small reproduction so I can test these changes?

[Mini-ghost]

Minimal Reproduction

I'm sorry, this issue is indeed difficult to reproduce. Could you please follow the steps shown in the video, along with the minimal reproducible test? My computer's interface is in Traditional Chinese, but I believe the settings should be the same.

2024-09-03.6.57.31.mov

1. Click the Apple () symbol in the top-left corner of your Mac's menu bar, then click "System Settings...".
2. Using the sidebar, scroll down and select "Appearance."
3. Under the "Show scroll bars" option, click the radio button next to "Always."
4. Open the minimal reproducible test. Currently, there are only 4 lines of text, but <UTextarea> calculates space for 5 lines.

[romhml]

Thanks! I was able to reproduce it!

[romhml]

Thanks :)

[benjamincanac]

Thanks! 😊