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Popover: tidy up and improve shifting behavior #42531

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@ciampo ciampo commented Jul 19, 2022

What?

The main changes in this PR are:

  • refactored the custom frameOffset middleware to use the offset middleware instead of manually adding up x and y coordinates
  • refined the logic in the limitShift() floating UI's option, in order to allow the floating element to fully shift past its reference when scrolling down in the site editor
  • added a default value to the __unstableForcePosition prop
  • added an exhaustive set of dependencies to the useLayoutEffect hook in the Popover component
  • the remaining changes are variable renames and inline comments that I found myself changing while understanding more about how Popover works

You can refer to the individual commits for an easier review of the changes.

Why?

(partially) fixes the regression flagged in #41575

alternative approach to #42417 and #42521

How?

Testing Instructions

So far, I've only tested these changes with the block toolbar in the site editor and post editor.
We should definitely test more throughly and across all different popover usages, but first I'd first like to establish if this is a potentially good approach, before investing more time in it

Screenshots or screencast

Kapture.2022-07-19.at.14.20.06.mp4

@ciampo ciampo self-assigned this Jul 19, 2022
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Size Change: +105 B (0%)

Total Size: 1.27 MB

Filename Size Change
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compressed-size-action

@ciampo ciampo added [Type] Bug An existing feature does not function as intended [Feature] UI Components Impacts or related to the UI component system [Package] Components /packages/components [Package] Block editor /packages/block-editor [Package] Edit Site /packages/edit-site labels Jul 19, 2022
packages/components/src/popover/index.js Outdated Show resolved Hide resolved
return offsetMiddleware( ( { placement } ) => {
const computedMainAxis = getMainAxisFromPlacement( placement );
return {
mainAxis: computedMainAxis === 'x' ? -top : -left,
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I think there are a couple of fixes to be made here. If the main axis is x (horizontal), the offset should be left (also horizontal).

I think the problem is that getMainAxisFromPlacement is returning the wrong value. From the docs, the main axis is the one on which the distance between the reference and floating elements would be measure, so for a top or bottom placement you'd measure along the y axis.

I also noticed in #42417 that for top and left placements, the offset needs to be subtracted on the main axis, and for right and bottom placements added.

When that's all addressed, the code will be very similar to #42417, so perhaps it's worth reviewing/merging that PR? I tested it pretty thoroughly on a range of placements.

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When that's all addressed, the code will be very similar to #42417, so perhaps it's worth reviewing/merging that PR? I tested it pretty thoroughly on a range of placements.

That is definitely true, although this PR also adds a more refined behavior to limitShift, and several other minor improvements.

Probably the best course of action is to review / merge #42417 and then rebase this PR and refine the limitShift approach ?

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Sounds good to me, thanks 👍

@ntsekouras ntsekouras force-pushed the try/popover-normalize-behavior branch from 84cefba to 36c0d69 Compare July 25, 2022 09:41
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I rebased to better check things as this PR affects some popovers placement.

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talldan commented Aug 2, 2022

Is this one ready for review @ciampo?

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ciampo commented Aug 2, 2022

Is this one ready for review @ciampo?

Not yet, but I plan on marking it as such by Wed EOD

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ciampo commented Aug 3, 2022

I actually decided to split the work done in this PR across a few smaller, more focused PRs:

I'm going to close this PR, we can continue the conversation in the smaller PRs.

@ciampo ciampo closed this Aug 3, 2022
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ciampo commented Aug 12, 2022

Opened #43186 with fixes to the animation origin

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3 participants