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Site Editor: Highlight list view blocks when canvas blocks are hovered #29103

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jeyip
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@jeyip jeyip commented Feb 18, 2021

Description

  • Jacopo is currently tackling the implementation of a persistent list view for full site editing in Site Editor: Persistent List View #28637.
  • In it, he introduces functionality where, when a list view block is hovered, the corresponding canvas block is highlighted.
  • This PR is a follow-up, and is meant to implement the converse functionality -- when a canvas block is hovered, the corresponding list view block will be highlighted.

See the GIF below for more context.

How has this been tested?

  • Spin up a local instance of Gutenberg
  • Enable a block theme
  • Navigate to the site editor
  • Open the list view and

Screenshots

2021-02-18 00 17 26

To-dos

  • Implement the highlightBlocksOnHover prop
  • Investigate performance concerns from our approach to highlighting state management
  • Fix list view block highlight styling
  • E2E Tests
  • Consider better naming

Types of changes

New feature that addresses #28699 and builds on top of #28637

Checklist:

  • 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.

@jeyip jeyip self-assigned this Feb 18, 2021
@jeyip jeyip requested a review from ellatrix as a code owner February 18, 2021 08:16
@jeyip jeyip requested a review from Copons February 18, 2021 08:16
@jeyip jeyip marked this pull request as draft February 18, 2021 08:16
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@jeyip jeyip left a comment

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There are a lot of wrinkles with the code, and this definitely isn't a final draft of what we'll deliver (See To-dos in the PR description). Looking for more general feedback on the approach and if this is what you had in mind @Copons

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Size Change: +60 B (0%)

Total Size: 1.38 MB

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@Copons
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Copons commented Feb 18, 2021

I've been mulling over this for a long time, and I'm still not exactly sure if this is the right way to go.

My doubt can be boiled down to: what's the difference between "highlight" and "hover"?

On a technical level, the highlight is tracked with Redux, while the hover is handled via internal state (via hook, but that's irrelevant).
There are subtle visual differences: hover adds a blue (admin theme color) border, while highlight adds a black border, with a slightly different thickness.

In this PR (and in my initial experiment as well), we are setting a block highlighted on hover, which in turn means that hovering on a block will make it both hovered and highlighted.

Do we need both states?
Is hover semantically different than highlight, and therefore should they be kept separate?

I've got a draft (#29005) that moves the block hover state to Redux, basically mirroring the highlight behaviour.
I haven't opened it for review because I'm not totally convinced by it.

Besides the question about highlight/hover, I also wonder if dispatching on every mouseover and mouseout might be a performance issue. 🤔

@jeyip
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jeyip commented Feb 18, 2021

Do we need both states?
Is hover semantically different than highlight, and therefore should they be kept separate?

Completely agree with posing this question. I had some confusion while coding out this PR, but couldn't quite verbalize what was "off". Gonna give this more thought 🤔

I've got a draft (#29005) that moves the block hover state to Redux, basically mirroring the highlight behaviour.
I haven't opened it for review because I'm not totally convinced by it.

👍

Besides the question about highlight/hover, I also wonder if dispatching on every mouseover and mouseout might be a performance issue. 🤔

Yep! Noted it in the PR description -- it's a concern for me as well. I don't have any great answers yet.

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jeyip commented Feb 19, 2021

Closing this PR in favor of Jacopo's similar draft #29005 (although, as discussed, we might go a different route altogether)

@jeyip jeyip closed this Feb 19, 2021
@johnbillion johnbillion deleted the try/highlighting-list-view-blocks branch February 10, 2025 16:40
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