Bug: "text/plain" clipboard data of copied table cells is incorrect

[mshafer]

When copying table cells from Lexical, the text/plain data is incorrect – it contains duplicated/nested versions of the content.

Copying this table:

Results in this text content when pasted in a text editor:

Lexical version: v0.17.0+dev.esm (current Lexical Playground version)

Steps To Reproduce

1. Insert a table into the Lexical Playground
2. Select cells from the table, then copy the cells
3. Open a plain text editor and paste the content.
4. Expect just the original cell content, observe that it contains duplicated versions of the original content

The current behavior

text/plain clipboard data of copied table cells contains duplicated content.

The expected behavior

text/plain clipboard data should be a simple representation of the original table cell content, with no duplication

Impact of fix

Any users of tables will get correct content when pasting into plain text environments. The current issue does not seem to impact copy paste of the text/html or application/x-lexical-editor versions of the data on the clipboard.

[etrepum]

I can't reproduce this, what exactly is the selection you have and which browser are you using?

[mshafer]

It's a table selection with the anchor at the top-left cell and the focus in the bottom-right cell:

Inspecting the ClipboardEvent in Chrome shows:

> event.clipboardData.getData("text/plain")
'A\n\nB\n\n1\n\n2A\n\nBAAABBB1\n\n2111222'

This is in Chrome 128.0.6613.85.

Interestingly if I instead do a range selection that spans over the entire table, the pasted plaintext content is then correct.

[etrepum]

And how exactly are you copying the table in this scenario and which platform are you using? On macOS, I can't get cmd-C or the Chrome's edit menu copy to trigger the copy with a table selection on the current playground, but it does work with a range selection that includes the table

[mshafer]

Oh yes I'm on macOS as well (Sonoma 14.4.1), and in the examples above I was using cmd-C to trigger the copy.

I can also reproduce the same behaviour using either "Edit > Copy" from Chrome's menu bar, or right-clicking a table cell and selecting "Copy". (In between each of these tests I copied some other text to wipe my clipboard data, just to be sure.)

Happy to share screen recordings of any of this if that helps.

[mshafer]

Thank you for the fix, @etrepum and @ivailop7!