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Deprecate useBlockEditContext in favour of useBlockClientId #29309

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@ellatrix ellatrix commented Feb 24, 2021

Description

Ideally the only piece of context is the block client ID and everything else is derived from that. Unfortunately useBlockEditContext is exported at the package level (not sure why because it's only used within the package), but it can be rewritten with useSelect.

How has this been tested?

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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.

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Size Change: +93 B (0%)

Total Size: 1.4 MB

Filename Size Change
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@ellatrix ellatrix added the [Type] Code Quality Issues or PRs that relate to code quality label Feb 24, 2021
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Not sure where to failures are coming from so splitting into smaller PRs to pinpoint.

@ellatrix ellatrix force-pushed the try/block-context-cleanup branch 2 times, most recently from ce585e1 to 53eb9ce Compare February 24, 2021 23:52
@geriux geriux added the Mobile App - i.e. Android or iOS Native mobile impl of the block editor. (Note: used in scripts, ping mobile folks to change) label Feb 25, 2021
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fluiddot commented Feb 25, 2021

👋 I think I've found the reason of the failure of the Unit Tests / Mobile check, for some reason the prop isSelected of the RichText component (native version) with these changes is now true when the component is mounted, however with changes from master the prop's value is false.

I'm not sure why this prop is now receiving the opposite value but it would be nice to investigate it further just in case it produces any undesired side effects.

Regarding the failure, this uncovered a problem we have in the unit tests because the focus function of the AztecView component is now being called due to to having the prop isSelected as true. That function should be mocked because it calls native functions not available when running unit tests, but unfortunately it's not and therefore when calling native functions it fails.

I'm going to open a PR adding the proper mock for the AztecView component but I'll keep investigating potential side effects.

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Upon further investigation I realised that the root cause of all the issues is related to how we calculate if a block is selected, specifically for the RichText component.

Previous to these changes, the value was passed through the block edit context which is not being used when running unit tests so that value was always undefined.

Now as the value is fetched directly via the selector, it's returning a different value. The cause of this is that the blocks rendered within unit tests don't have a clientId and the isBlockSelected selector is not properly calculating the value. In fact it's returning true because it does a comparison of the state's value and the one passed (undefined === undefined) which is not correct (related code).

It would be nice if we add this case to the selector and check if the clientId passed is undefined and return false in that case.

Apart from that I think the changes are safe from the mobile version perspective 🎊 .

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Upon further investigation I realised that the root cause of all the issues is related to how we calculate if a block is selected, specifically for the RichText component.

Previous to these changes, the value was passed through the block edit context which is not being used when running unit tests so that value was always undefined.

Now as the value is fetched directly via the selector, it's returning a different value. The cause of this is that the blocks rendered within unit tests don't have a clientId and the isBlockSelected selector is not properly calculating the value. In fact it's returning true because it does a comparison of the state's value and the one passed (undefined === undefined) which is not correct (related code).

It would be nice if we add this case to the selector and check if the clientId passed is undefined and return false in that case.

Apart from that I think the changes are safe from the mobile version perspective 🎊 .

I created this PR that fixes the mentioned issue.

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fluiddot commented Mar 4, 2021

👋 I created this PR that should fix the errors when running the native unit tests of this PR.

My approach, as described in the PR, is to basically render the BlockEdit component in the unit tests instead of the edit component. This way we add the context that is required by some blocks.

@ellatrix ellatrix force-pushed the try/block-context-cleanup branch 2 times, most recently from 8b9505a to 7d91aa2 Compare March 4, 2021 23:13
@ellatrix ellatrix changed the title Attempt to deprecate useBlockEditContext in favour of useBlockClientId Deprecate useBlockEditContext in favour of useBlockClientId Mar 4, 2021
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ellatrix commented Mar 4, 2021

@fluiddot I got rid of the problem by returning early in case there is no client ID: f0a0056#diff-d5252e488c7dc0d44aba3d01d607ba2d77100d56d7513d82fc3839142ecf6347R27

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fluiddot commented Mar 5, 2021

@fluiddot I got rid of the problem by returning early in case there is no client ID: f0a0056#diff-d5252e488c7dc0d44aba3d01d607ba2d77100d56d7513d82fc3839142ecf6347R27

I'm afraid that won't fix all the errors because the problem is related to not having a defined clientID. For example, one of the errors from the unit tests is caused by the RichText editor component, that is receiving true when calling the isBlockSelected selector (related code).

The PR I made for fixing this is ready to merge so once the PR check passes, I'll merge it and you could include the changes in this branch.

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fluiddot commented Mar 9, 2021

@ellatrix the fixes for the iOS e2e tests have been merged into trunk so feel free to update this PR and re-run them again. 🤞

@ellatrix ellatrix force-pushed the try/block-context-cleanup branch from 7d91aa2 to 11efbe1 Compare March 9, 2021 19:59
@guarani guarani removed their request for review February 7, 2022 18:53
@ellatrix ellatrix closed this Oct 17, 2022
@ellatrix ellatrix deleted the try/block-context-cleanup branch October 17, 2022 08:26
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