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Image block: fix undo step with temporary URL #30114

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merged 2 commits into from
Mar 24, 2021
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@ellatrix ellatrix commented Mar 22, 2021

Description

Partly fixes #8119.

The proposal is simple: keep the temporary image in local state until it is uploaded. Only then set the block attributes.

Downside: the image addition is not immediately added to the post content state, so it's not immediately undoable and the undo history might not be in the right order if the user makes changes while the image is uploading. This seems like a small enough downside that is better than a broken undo level. Usually image uploading is fairly fast.

I'm sure there's other more sophisticated solution, but this seems like a good small temporary solution.

How has this been tested?

Screenshots

Types of changes

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.

@ellatrix ellatrix requested a review from ajlende as a code owner March 22, 2021 21:34
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Size Change: +40 B (0%)

Total Size: 1.41 MB

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@ellatrix ellatrix requested review from mcsf and youknowriad March 22, 2021 22:23
@ellatrix ellatrix added [Block] Image Affects the Image Block [Feature] History History, undo, redo, revisions, autosave. labels Mar 22, 2021
@ellatrix ellatrix changed the title Image block: try to fix undo trap Image block: fix undo step with temporary URL Mar 22, 2021
@youknowriad
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This sounds like a good approach to me. Though, not something we could implement in things like transforms where the temporary url is assigned from outside the block (like drag and drop a file). Any thoughts about that?

@ellatrix
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Haven't thought about it much. I'm checking the issues on a case by case basis and trying to find a simple solution to at least get rid of some brokenness. Perhaps we do need a better long term solution to fix all cases, but maybe it's good to reduce broken undo levels quicker if we have the opportunity to do it with a simpler change.

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Looks good

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mcsf commented Mar 23, 2021

This sounds like a good approach to me. Though, not something we could implement in things like transforms where the temporary url is assigned from outside the block (like drag and drop a file). Any thoughts about that?

Yeah, it's this sort of stuff that made #8119 so thorny to handle, and why at some point we entertained the idea of "transient attributes" or "silent attributes" or even "silent attribute changes", but we were never fully satisfied with either. That said, I'm happy that, Ella, you're working on this, and, as you say, we can polish case by case.

👍

@ellatrix ellatrix force-pushed the fix/image-undo-trap branch from 61eb7a4 to b8fa21b Compare March 24, 2021 10:18
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Tested again and this seems to work well. Let's merge and iterate.

Worth noting that transforms are also slightly different in that the image problem didn't create an undo trap, only a broken undo level with a temporary blob URL.

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"Undo trap": Avoid getting stuck in an editing state
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