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Editor: make VisualEditor a stacking context #62681

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merged 1 commit into from
Jun 25, 2024

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stokesman
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What?

A change to VisualEditor so it contains z-indexes of children within it (as a stacking context)

Why?

To fix #62639, in which it’s noted that the block toolbar is not actually underneath the editor header and so the header’s shadow disappears behind it.

How?

Add isolation: isolate to the component’s root element.

Testing Instructions

  1. Disable the Top Toolbar.
  2. Click any block.
  3. Scroll down the canvas.
  4. When the block is visible in the canvas, the block toolbar will be docked below the header.
  5. Scroll the canvas some more.
  6. As the block becomes invisible, the block toolbar will overlap the header.
  7. The header shadow should shade the block toolbar.

@stokesman stokesman added [Type] Bug An existing feature does not function as intended [Package] Editor /packages/editor labels Jun 20, 2024
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Co-authored-by: stokesman <presstoke@git.wordpress.org>
Co-authored-by: t-hamano <wildworks@git.wordpress.org>
Co-authored-by: youknowriad <youknowriad@git.wordpress.org>
Co-authored-by: ellatrix <ellatrix@git.wordpress.org>

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github-actions bot commented Jun 20, 2024

Size Change: +16 B (0%)

Total Size: 1.76 MB

Filename Size Change
build/editor/style-rtl.css 9.2 kB +8 B (+0.09%)
build/editor/style.css 9.21 kB +8 B (+0.09%)
ℹ️ View Unchanged
Filename Size
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@t-hamano t-hamano added the Backport to WP 6.7 Beta/RC Pull request that needs to be backported to the WordPress major release that's currently in beta label Jun 20, 2024
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This PR is working as expected. Also, as far as I tested, there are no other issues caused by this PR.

Before

image

After

image

However, the next release this PR will be backported is RC version, and to be on the safe side, I would like to ask for a second review by people who are knowledgeable in this area 🙏

@youknowriad @draganescu @jeryj

@@ -3,6 +3,8 @@
height: 100%;
display: block;
background-color: $gray-300;
// Make this a stacking context to contain the z-index of children elements.
isolation: isolate;
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😬 I just learned about this

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Same 😅

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😬 I just learned about this

And yet you used the property here 😆

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I know I know, that's where I saw it first. I copied it form the View Transition Guide (by Google) to reset cross-shadow transitions :P

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Seems ok to me but I wonder what impact this change can have. (other z-index related impact)

@t-hamano
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Personally, I think this issue is less serious. Would it be better to test it only on Gutenberg for now and not backport it to WP 6.6?

@stokesman
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Seems ok to me but I wonder what impact this change can have. (other z-index related impact)

I’m all for making haste slowly. The property could have been on the __content or __body elements of the interface skeleton but putting it deeper in the tree seemed more conservative. This should only affect z-indexes within. Here are the ones I've found and tested:

  • block toolbar
  • in-between inserter
  • spacing visualizer
  • grid visualizer

They are all probably expected to be no higher than the visual editor itself and seem to work as expected. Any popover launched from those is out in the fallback container as are any other popovers I've found in the interface so can’t be affected by this change.

@t-hamano t-hamano self-requested a review June 24, 2024 07:55
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@stokesman I think it would be better to merge this PR without the backport label just to be safe. What do you think?

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It’s fine by me. Is there a chance to still fix the issue in 6.6? If not by backporting this later then perhaps a PR which fixes it by changing z-index? I know the issue isn’t critical but it’d be nice have it done.

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Pinging @ellatrix @vcanales - I would be happy to decide whether to backport this PR to WP6.6.

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Sure it's fine, but needs to be merged asap, we're cherrypicking rn

@ellatrix ellatrix enabled auto-merge (squash) June 25, 2024 08:52
@t-hamano t-hamano force-pushed the update/visual-editor-stacking-context branch from 826b008 to 8937f9d Compare June 25, 2024 09:40
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It seemed like GitHub Actions had stopped, so I rebased it to get it running again.

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Flaky tests detected in 8937f9d.
Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/9660133699
📝 Reported issues:

@ellatrix ellatrix merged commit 25aa1b8 into trunk Jun 25, 2024
61 checks passed
@ellatrix ellatrix deleted the update/visual-editor-stacking-context branch June 25, 2024 10:15
@github-actions github-actions bot added this to the Gutenberg 18.7 milestone Jun 25, 2024
gutenbergplugin pushed a commit that referenced this pull request Jun 25, 2024
Co-authored-by: stokesman <presstoke@git.wordpress.org>
Co-authored-by: t-hamano <wildworks@git.wordpress.org>
Co-authored-by: youknowriad <youknowriad@git.wordpress.org>
Co-authored-by: ellatrix <ellatrix@git.wordpress.org>
@github-actions github-actions bot added the Backported to WP Core Pull request that has been successfully merged into WP Core label Jun 25, 2024
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I just cherry-picked this PR to the wp/6.6 branch to get it included in the next release: 349a36d

@ellatrix ellatrix removed the Backport to WP 6.7 Beta/RC Pull request that needs to be backported to the WordPress major release that's currently in beta label Jun 25, 2024
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@stokesman Maybe this PR caused an issue with popovers. Is there a way to fix this?

Please see #62998

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Backported to WP Core Pull request that has been successfully merged into WP Core [Package] Editor /packages/editor [Type] Bug An existing feature does not function as intended
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Block toolbar removes bottom shadow of header
4 participants