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Patterns: Apply white background to the preview as a fallback #54534

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merged 1 commit into from
Sep 19, 2023

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@t-hamano t-hamano commented Sep 18, 2023

Fixes #54533

What?

This PR applies a white background to the pattern page preview when the currently activated theme does not have a background color.

Before After
before after

Why?

This is because if the currently active theme does not have a background color, it will be affected by the black canvas background behind the preview.

How?

If the background color obtained via the useGlobalStyle hook is undefined, the default white color is passed to the BlockPreview component.

Before this approach, I also tried a simple CSS solution as follows.

.edit-site-patterns__preview iframe {
	background-color: #fff;
}

However, this is not a problem for themes that do not define a background color, but for themes that do have a background color, the following flickering occurs:

Screencast
864f979559cbeda0e27e2f83aa177805.mp4

Testing Instructions

  • Enable Emptytheme.
  • On the Patterns page, select the General category.
  • Make sure the background of the header template is white.
  • Enable TwentyTwentyThree and switch to a theme style with a non-white background.
  • On the Patterns page, make sure the pattern preview has the theme's background.

@t-hamano t-hamano added the [Feature] Patterns A collection of blocks that can be synced (previously reusable blocks) or unsynced label Sep 18, 2023
@t-hamano t-hamano self-assigned this Sep 18, 2023
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Size Change: +41 B (0%)

Total Size: 1.62 MB

Filename Size Change
build/edit-site/index.min.js 181 kB +41 B (0%)
ℹ️ View Unchanged
Filename Size
build/a11y/index.min.js 955 B
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@t-hamano t-hamano marked this pull request as ready for review September 18, 2023 05:15
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github-actions bot commented Sep 18, 2023

Flaky tests detected in 78cf864.
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/6218346811
📝 Reported issues:

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Nice tweak @t-hamano, thank you!

This tests well for me.

Before After Theme with BG
Screenshot 2023-09-19 at 12 18 18 pm Screenshot 2023-09-19 at 12 17 47 pm Screenshot 2023-09-19 at 12 19 31 pm

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@aaronrobertshaw Thanks for the review!

@aaronrobertshaw aaronrobertshaw added the [Type] Enhancement A suggestion for improvement. label Sep 19, 2023
@t-hamano t-hamano merged commit 200631a into trunk Sep 19, 2023
52 of 56 checks passed
@t-hamano t-hamano deleted the patterns/preview-default-background branch September 19, 2023 04:37
@github-actions github-actions bot added this to the Gutenberg 16.7 milestone Sep 19, 2023
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Patterns: Preview area requires default white background
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