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Image block: Remove extra lookup for external image dimensions in lightbox #52178

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merged 1 commit into from
Jun 30, 2023

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@artemiomorales artemiomorales commented Jun 30, 2023

What?

In the lightbox, when dealing with external images, were doing a call to wp_getimagesize() in order to get the dimensions needed to set the lightbox styles.

However, we actually don't need to make the call, because when it comes to external images, the zoomed lightbox image is the same as the image in the content — and has the same dimensions.

This PR removes the call to wp_getimagesize() and adds logic to handle this scenario.

Why?

We should avoid making unnecessary network requests, especially with image files.
Fixes #52172

How?

It sets the 'width' and 'height' values to 'none' in the Interactivity API context, then adds a conditional to get the lightbox enlarged dimensions from the image in the content if the width and height values are unavailable.

Testing Instructions

  1. Ensure the Gutenberg Interactivity API experiment is enabled in the admin
  2. Add an image from an external URL
  3. Enable the lightbox using Advanced > Behaviors > Lightbox in block settings
  4. Publish the post and click on the image
  5. See that the lightbox works as expected
  6. Try adding another image, but this time using a broken external URL
  7. View the post and make sure there are no PHP errors or other unexpected behavior (in this scenario, since there is no image, the lightbox should be unavailable)

Testing Instructions for Keyboard

N/A

If a user uses an external image, then we only know
one set of dimensions, and we can use those dimensions
from the image in the content for the lightbox.

This commit adds logic to handle that scenario.
@artemiomorales artemiomorales added [Type] Enhancement A suggestion for improvement. [Block] Image Affects the Image Block [Feature] Interactivity API API to add frontend interactivity to blocks. labels Jun 30, 2023
@artemiomorales artemiomorales self-assigned this Jun 30, 2023
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Size Change: +22 B (0%)

Total Size: 1.42 MB

Filename Size Change
build/block-library/blocks/image/view-interactivity.min.js 1.46 kB +22 B (+2%)
ℹ️ View Unchanged
Filename Size
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Flaky tests detected in ce87aa5.
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/5423803380
📝 Reported issues:

@artemiomorales artemiomorales merged commit 96c6cfe into trunk Jun 30, 2023
@artemiomorales artemiomorales deleted the update/lightbox-external-image-improvements branch June 30, 2023 14:53
@github-actions github-actions bot added this to the Gutenberg 16.2 milestone Jun 30, 2023
@mikachan mikachan added the Needs PHP backport Needs PHP backport to Core label Sep 5, 2023
@SiobhyB SiobhyB removed the Needs PHP backport Needs PHP backport to Core label Sep 25, 2023
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[Block] Image Affects the Image Block [Feature] Interactivity API API to add frontend interactivity to blocks. [Type] Enhancement A suggestion for improvement.
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Image Block: Devise alternative to getimagesize() to prevent unnecessary network requests when using lightbox
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