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Fix support of sticky position in non-iframed post editor #53540

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merged 2 commits into from
Aug 15, 2023

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stokesman
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@stokesman stokesman commented Aug 10, 2023

What?

This is a rework of #49978 to fix up the effect it had of breaking sticky positioning in the legacy (non-iframed) post editor.

Why?

Sticky positioning in the non-iframed post editor is not working as before. To fix #53477

How?

Adds a class to allow the fix made in #49978 to target just the iframed editor thus avoid its breakage in the non-iframed editor.

At first I tried to avoid adding a class but didn't find any existing markup to hang this on and didn't want to use :has for lack of complete support. There's .has-metaboxes that works in some cases but doesn't when it’s a block of apiVersion < 3 causing the lack of iframe. Alternative ideas are welcome.

Testing Instructions

  1. Open a post
  2. Turn on the Custom fields (Options > Preferences > Panels > Custom fields)
  3. Once the editor reloads add a sticky positioned element and enough content to test scrolling.
  4. Scroll and verify that the sticky positioning works as expected.

Sample markup to test sticky positioning

<!-- wp:group {"style":{"position":{"type":"sticky","top":"0px"}},"layout":{"type":"constrained"}} -->
<div class="wp-block-group"><!-- wp:heading -->
<h2 class="wp-block-heading">Stick me?</h2>
<!-- /wp:heading --></div>
<!-- /wp:group -->

<!-- wp:spacer {"height":"3000px"} -->
<div style="height:3000px" aria-hidden="true" class="wp-block-spacer"></div>
<!-- /wp:spacer -->

Screenshots or screencast

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github-actions bot commented Aug 10, 2023

Size Change: +1.17 kB (0%)

Total Size: 1.5 MB

Filename Size Change
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ℹ️ View Unchanged
Filename Size
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Flaky tests detected in 38b48cc.
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/5825194035
📝 Reported issues:

@stokesman stokesman added the [Type] Regression Related to a regression in the latest release label Aug 10, 2023
@andrewserong andrewserong added the [Package] Edit Post /packages/edit-post label Aug 11, 2023
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Great work honing in on a good fix for this one @stokesman!

At first I tried to avoid adding a class but didn't find any existing markup to hang this on and didn't want to use :has for lack of complete support

I quite like the addition of the classname as it means we can be explicit about why the overflow: hidden rule is added 👍

This is testing nicely for me:

✅ When iframed, this is working as on trunk and the duplicate scrollbars issue is not reintroduced
✅ When not iframed, this resolves the issue for sticky positioning and allows sticky elements to stick to the top of the editor

Just left a comment about whether we should add a comment explaining why the overflow: hidden rule is sometimes present, but other than that this LGTM! ✨

@@ -2,7 +2,9 @@
position: relative;
display: flex;
flex-flow: column;
overflow: hidden;
&.is-isolated {
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Should we add a comment prior to this rule explaining why overflow: hidden is only applied when .is-isolated is applied? It's a tricky edge case this one, so could be good to make sure we don't accidentally reintroduce the problem further down the track.

@andrewserong andrewserong added the Backport to WP Minor Release Pull request that needs to be backported to a WordPress minor release label Aug 11, 2023
@ellatrix
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Now that the editor is iframed by default, I think it's time to remove the inline classic editor entirely. It was only left inline because we didn't want to change the default experience yet last time.

@@ -2,7 +2,9 @@
position: relative;
display: flex;
flex-flow: column;
overflow: hidden;
&.is-isolated {
overflow: hidden;
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Does it hurt to always apply this rule?

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@andrewserong andrewserong Aug 11, 2023

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Yes, unfortunately overflow: hidden in the non-iframed editor prevents the styling for sticky positioned blocks from working (E.g. Group block set to sticky).

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Oops, sorry, I meant to never apply this rule. There's no comment about why it's needed

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I've added a comment with explanation for both cases. I also inverted the application of the class. It seems a hair neater that way as a class isn't added for what is the expected case.

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Oops, sorry, I meant to never apply this rule. There's no comment about why it's needed

Ah, gotcha. And thanks for adding the explanatory comment @stokesman!

@ellatrix there's a screengrab on the earlier PR that added overflow: hidden over in #49978 — basically, the interaction between the iframed editor and the block toolbar popover results in additional scrollbars when the toolbar goes off screen in long posts if we don't have the rule in place.

@stokesman stokesman merged commit ba80165 into trunk Aug 15, 2023
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@stokesman stokesman deleted the fix/support-sticky-post-editor branch August 15, 2023 04:08
@github-actions github-actions bot added this to the Gutenberg 16.5 milestone Aug 15, 2023
tellthemachines pushed a commit that referenced this pull request Aug 15, 2023
* Fix support of sticky position in non-iframed post editor
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I just cherry-picked this PR to the update/bugfixes-6-3-1 branch to get it included in the next release: edba315

@tellthemachines tellthemachines removed the Backport to WP Minor Release Pull request that needs to be backported to a WordPress minor release label Aug 15, 2023
tellthemachines pushed a commit that referenced this pull request Aug 31, 2023
* Fix support of sticky position in non-iframed post editor
tellthemachines added a commit that referenced this pull request Sep 1, 2023
* Update document title buttons radius (#53221)

* Fix: Sync status overlaps for some languages in Patterns post type page (#53243)

* Image block: Fix stretched images constrained by max-width (#53274)

* Fix dragging to resize from stretching image in the frontend

* Add image block v7 deprecation

* Update deprecation comment

* Prevent image losing its aspect ratio at smaller window dimensions

* Revert "Prevent image losing its aspect ratio at smaller window dimensions"

This reverts commit 8ac9f8c.

---------

Co-authored-by: scruffian <[email protected]>

* Image Block: Don't render `DimensionsTool` if it is not resizable (#53181)

* Fix missing Replace button in content-locked Image blocks (#53410)

* Revert "don't display BlockContextualToolbar at all in contentonly locking (#53110)"

This reverts commit 5efce0e.

* Alternative fix to hide BlockContextualToolbar when there are no controls

* fix the go to for non pages by showing it only for pages (#53408)

* Site Editor: Fix document actions label helper method (#52974)

* Site Editor: Fix document actions label helper method
* Add missing useSelect dep
* Fix e2e tests
* Move the label map at the file level to avoid recreating the object on every render

* Image: Clear aspect ratio when wide aligned (#53439)

* RichText: Remove 'Footnotes' when interactive formatting is disabled (#53474)

Introduce a new 'interactive' setting for format types

* Preserve block style variations when securing theme json (#53466)

* Preserve block style variations when securing theme json

Valid and safe block style variations were being removed by
`WP_Theme_JSON_Gutenberg::remove_insecure_properties` when securing the
theme.json. When this was a problem varied depending upon site
configuration, but out-of-the-box it was a problem for administrators on
multi-site installs.

This change adds explicit processing of variations in
`remove_insecure_properties` so that they won't get removed.

* Add another variation sanitisation test

This test checks that when removing insecure properties an
unknown/unsupported property is removed from the variation.

* Site editor: add missing i18n in `HomeTemplateDetails` (#53543)

* Site editor: add missing i18n in `HomeTemplateDetails`

* Lint fix

* Fix: Snack bar not fixed on certain pages in the Site Editor (#53207)

* Fix document title alignment in command palette button (#53224)

* Fallback to default max viewport if layout wide size is fluid. (#53551)

* Link Control: persist advanced settings toggle state to preferences if available (#52799)

* Link Control: Create a preference for whether the advanced section is open

* move the useSelect to the component that uses it

* Supply preference setter via settings

* Pass setter to Post Editor

* Provide local state fallbacks in absence of preference store settings

* Conditionalise display of settings drawer to “edit” mode only

* Extract to constant to improve comprehension

* Fix bug in preferences resolution

* Improve comments

* Add e2e scaffold

* Fix e2e test to correctly assert on feature

* Remove focused test

* Reinstate original logic to hide settings when not required

* Scaffold documentation

* Revert providing prefs via settings

* Refactor to use `core/block-editor` as preference scope

* Update docs

* Reinstate remaining original conditional

* tentative fix for the e2e test

* Try a different syntax for shiftAlt

* another attempt to fix the e2e test

---------

Co-authored-by: Dave Smith <[email protected]>
Co-authored-by: MaggieCabrera <[email protected]>

* Add tests for fluid layout + typography (#53554)

* Fix support of sticky position in non-iframed post editor (#53540)

* Fix support of sticky position in non-iframed post editor

* Revert "Footnotes: Fix recursion into updating attributes when attributes is not an object (#53257)"

This reverts commit ab04074.

* Fix: indicator style when block moving mode (#53972)

* Fix post editor top toolbar with custom fields in Safari (#53688)

* Set top toolbar size dynamically (#53526)

* fix the top toolbar size in the space remaining after plugin items are pinned

* only resize above the tablet breakpoint

* fix fixed block toolbar collapse button when icon labels are shown

* Update height and scroll behavior

* move the layout effect to the affected component, fixes for fullscreen, no block selected, icon labels height

---------

Co-authored-by: jasmussen <[email protected]>

* Roll back camelCase change in 96b6b1e

---------

Co-authored-by: James Koster <[email protected]>
Co-authored-by: Aki Hamano <[email protected]>
Co-authored-by: Alex Lende <[email protected]>
Co-authored-by: scruffian <[email protected]>
Co-authored-by: Robert Anderson <[email protected]>
Co-authored-by: Andrei Draganescu <[email protected]>
Co-authored-by: George Mamadashvili <[email protected]>
Co-authored-by: Dean Sas <[email protected]>
Co-authored-by: Pascal Birchler <[email protected]>
Co-authored-by: Dave Smith <[email protected]>
Co-authored-by: MaggieCabrera <[email protected]>
Co-authored-by: Mitchell Austin <[email protected]>
Co-authored-by: jasmussen <[email protected]>
Co-authored-by: ramon <[email protected]>
@ddryo
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ddryo commented Sep 2, 2023

@andrewserong @stokesman

In WordPress 6.3, the block toolbar is no longer available below 782px due to the addition of overflow:hidden.

I am glad that this PR will fix that for 6.3.2. Thanks.

One thought though, what about using overflow:clip or (overflow-x: clip;)?

(I haven't looked at the issue in #49978 in detail, so maybe there is some reason why you adopted HIDDEN instead of CLIP. In that case, sorry for the rude suggestion)

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Thanks for the ping!

One thought though, what about using overflow:clip or (overflow-x: clip;)?

overflow: clip is very cool in that it means that overflow can be hidden without adding a new formatting context. I think it might only used in one place in Gutenberg (in the Cover block here, added in #50237). In that usage, a fallback value of overflow: hidden is still used for browsers that don't support clip (from memory that might just be older Safari browsers at this stage?), so in this PR, it's likely still good for the rule to be guarded based on whether or not the editor is iframed.

With the rule being guarded based on the additional class name, I'm not sure if there'd be much additional value to switching to clip at this stage, but we could certainly try it. Were there any other benefits of switching to overflow: clip that you had in mind? I'm curious if @stokesman has any thoughts on it, too 🙂

so maybe there is some reason why you adopted HIDDEN instead of CLIP

hidden was mostly selected for the concern of prioritising backwards compatibility wherever we can. It can be tricky sometimes using newer CSS features if there are inconsistencies for users on older browsers, so sometimes the rules added in Gutenberg can be a little cautious. Thanks for the suggestion!

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If I understand it, using clip would have allowed the sticky positioning to work but still would have made for instances where the block toolbar could be clipped in the non-iframed canvas and therefore it would need to be conditionally applied in the same way. I'm not aware of what advantage clip might have in this case but I'd be happy to learn of anything.

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[Package] Edit Post /packages/edit-post [Type] Regression Related to a regression in the latest release
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Classic Editor block: toolbar is no longer sticky when scrolling
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