On Wed, 8 Jan 2025 23:47:10 GMT, Michael Strauß <mstra...@openjdk.org> wrote:
>> The CSS Selectors specification defines the `:root` pseudo-class that >> matches root nodes: >> https://www.w3.org/TR/selectors-4/#the-root-pseudo >> >> JavaFX uses the non-standard `.root` style class for the same purpose. We >> should also support the `:root` pseudo-class for increased compatibility of >> JavaFX CSS with the web specification. >> >> Additionally, we should also support the following child-indexed >> pseudo-classes: >> `:first-child` >> `:last-child` >> `:only-child` >> `:nth-child()` with arguments `even` and `odd` >> >> The `An+B [of S]?` microsyntax for `:nth-child()` is not supported, as this >> would require major changes in JavaFX CSS. > > Michael Strauß has updated the pull request incrementally with one additional > commit since the last revision: > > updated cssref This outcome is what I would expect, and it puts an upper limit on the number of nodes that you can front-insert one by one into a container (the time complexity grows quadratically, so you'll pretty soon freeze the application). Note that back-inserting, or bulk-inserting nodes should have no noticeable performance impact. I think our options are the following: 1. Discard this feature. 2. Accept that this particular way of adding nodes to a container has a prohibitive time complexity for many nodes. 3. Do something clever, for example only toggle the pseudo-classes once per pulse. The disadvantage of this approach would be that the pseudo-classes of a node may be wrong after it is added to a container, and would then later fix themselves in the next pulse. 4. Do something even more clever, for example only set the pseudo-classes when someone is actually listening or retrieving their value. ------------- PR Comment: https://git.openjdk.org/jfx/pull/1652#issuecomment-2581034955
