Paste event propagates to two widgets

[tptaszek]

Bug Description:

Pasting text into a VSCode extension's webview panel results in text being pasted in two places: currently focused widget of the panel and previously focused theia's widget.

Steps to Reproduce:

Here's a zip with a simplest vscode extension (both source code and vsix) that only contributes a webview panel and a command to open it.
test-extension.zip

1. Run Theia or Theia IDE with attached vscode extension.
2. Use panel.open ("Open new test panel") command to open new webview panel.
3. Copy any text into clipboard.
4. Open e.g. Search panel on the left and set focus in the searchbox.
5. Set focus in the test panel's input box.
6. Use Ctrl+V to paste -> text will be pasted in both panel's input and searchbox.

Additional Information

• Operating System: Windows
• Theia Version: 1.64

[ndoschek]

Thanks for the report and for providing a minimal example to reproduce the issue 👍
Does this behavior occur with other types of inputs as well, or only with the search input?

We're always happy to see contribution, if you’re interested in looking into a fix, feel free to open a PR. Let us know if any feedback would be helpful along the way.

[tptaszek]

Hi, the issue occurs for every input field in the app.