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Post Content: Prevent infinite recursion #31455

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merged 3 commits into from
May 5, 2021

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@mcsf mcsf commented May 4, 2021

Fixes #26593.
Analogous to #28405 and #28456.

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  • My code is tested.
  • My code follows the WordPress code style.
  • My code follows the accessibility standards.
  • I've tested my changes with keyboard and screen readers.
  • My code has proper inline documentation.
  • I've included developer documentation if appropriate.
  • I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).

@mcsf mcsf added [Type] Bug An existing feature does not function as intended [Feature] Full Site Editing [Block] Post Content Affects the Post Content Block labels May 4, 2021
@mcsf mcsf requested a review from ajitbohra as a code owner May 4, 2021 11:19
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Size Change: -89 B (0%)

Total Size: 1.31 MB

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@mcsf mcsf requested a review from gziolo May 4, 2021 12:11
return '';
}

$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => 'entry-content' ) );
$content = apply_filters( 'the_content', str_replace( ']]>', ']]>', $content ) );
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It'd be good to add a comment with a reference to where the filter is documented. It's a common pattern used in WordPress core and this file is going to be soon exposed there as well.

Completely unrelated to this PR but it should be nice to fix here since it isn't that much work.

@@ -55,19 +57,41 @@ function Placeholder() {
);
}

function RecursionError() {
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Interesting, maybe something that useNoRecursiveRenders should also expose?

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Hm, interesting. Btw, I made it a separate component because otherwise some of the ref-juggling hooks inside useBlockProps — specifically, useScrollIntoView — throw errors.

something that useNoRecursiveRenders should also expose?

This assumes apiVersion: 2, though, because of the use of useBlockProps. Is that acceptable?

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It would be good to confirm why useScrollIntoView causes issues, maybe it was called too late, React is very strict about all the rules of hooks? I don't mind having it in its own component though. I mostly curious to confirm it isn't some sort of bug with the hook.

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Nice one, I haven't tested yet but code looks good 👍🏻

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I believe Post Content is a special case from the other two (Reusable and Template Part) in the sense that we render the initial post content without the use of Post Content block (see here). That (I think :) ) makes it have this rather weird behavior:

post content

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gziolo commented May 4, 2021

I believe Post Content is a special case from the other two (Reusable and Template Part) in the sense that we render the initial post content without the use of Post Content block (see here). That (I think :) ) makes it have this rather weird behavior:

In fact, you can see the same issue when you go to the page where you can edit a given Reusable block or Template Part block. I would have to find my comment where I describe the same issue.

Update: my related comment presenting exactly the same issue for Template Part block:
#28456 (comment)

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mcsf commented May 4, 2021

I believe Post Content is a special case from the other two (Reusable and Template Part) in the sense that we render the initial post content without the use of Post Content block (see here). That (I think :) ) makes it have this rather weird behavior:

This seems acceptable to me, no? I agree with Grzegorz that this experience will always be a little awkward, but the crucial thing is that we stop the recursion.

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gziolo commented May 5, 2021

I believe Post Content is a special case from the other two (Reusable and Template Part) in the sense that we render the initial post content without the use of Post Content block (see here). That (I think :) ) makes it have this rather weird behavior:

This seems acceptable to me, no? I agree with Grzegorz that this experience will always be a little awkward, but the crucial thing is that we stop the recursion.

Yes, it is fine to move forward. Fixing the issue might require changes to how the list of blocks is handled for those special cases. @ellatrix is looking into some slightly related changes to how BlockList could be refactored to use InnerBlock internally. I left there also a comment related to the issue we discuss here: #29895 (comment).

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[Block] Post Content Affects the Post Content Block [Type] Bug An existing feature does not function as intended
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Infinite recursion trying to edit a wp_template with revisions containing wp:post-content blocks
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