[search] Nitpick post-merge adjustments for #11944 (anchored search result summary retrieval).

[jayaddison]

Feature or Bugfix

• Nitpick / safety.

Purpose

• Restricts the area of the page that search result summaries can be displayed from to the expected document content area.

Detail

• When finding content to display as search result summaries, constrain the search for the anchor to within the [role=main] part of the page.

Relates

• HTML Search: Use anchor for search preview #11944 (comment)

[picnixz]

Do you think there could be themes that don't have this assumption? or is it possible to have something outside of the main block?

[jayaddison]

It's difficult to think of a problem that could occur, and I don't know of any examples - but I think that browser extensions inject elements with fixed identifiers, and there can be adverts/other elements on some pages that should not be displayed in search results.

I can't think how it would go badly wrong -- it would only be content that is already genuinely on the user's page when they run a search -- but I'd feel marginally better about the code if it only queries within the expected area.

[picnixz]

I can live with this.

[jayaddison]

Thank you!