On 11/21/2025 1:26 PM, Martin Thomson wrote:
I don't know if this is reasonable, but I see some interesting
compatibility challenges here.
Take:
https://datatracker.ietf.org/doc/html/rfc9000#:~:text=7841.,Information
That selects over a pilcrow that is in a <span> marked with
`user-select: none`. Edge presently returns '7841.¶\n\nInformation'
when asking for the selection. That seems consistent with your
`getSelection().getRangeAt(0).toString()` variant. Firefox does not
include the pilcrow OR the line feed characters. Firefox presently
returns '7841.Information'. What do you expect to happen with the
change? (There's a long-standing open bug on not including the line
feed characters when copying content like this that I'd love to see
fixed, FWIW. https://bugzilla.mozilla.org/show_bug.cgi?id=1832443)
Well, the serialization is managed by the serializer module which is
currently maintained by Edgar. According to his comment in the review,
we ignore "user-select:none" contents. I don't know whether this is
reasonable or not. From point of view of the rendering result, not
containing them is reasonable because they are painted as not selected.
From point of view of the some users, they may want the non-selectable
content in the clipboard data since they selected across the
non-selectable nodes.
On the other hand, the range across the boundaries of the paragraphs.
Then, I think it should be reasonable to contain the line break before
"Information". And with the fix, the line break is also copied into the
clipboard.
When Gecko splits a user selected range to multiple ranges, Gecko
started 2nd or latter range from following leaf content. I guess that
that the cause of not copying the line break caused by the new
paragraph. Gecko will ignore non-selectable nodes at serialization so
that the block boundaries won't be lost.
--
Masayuki Nakano<[email protected]>
Working on DOM, Events, editor and IME handling for Gecko
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