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Add configuration option to skip autop on freeform blocks when parsing blocks #42623

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merged 8 commits into from
Jul 25, 2022

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talldan
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@talldan talldan commented Jul 22, 2022

What?

Fixes #33832

The widget editor has had a long standing issue in that the block parser runs autoP on its freeform content. The widget editor doesn't have a classic block, so it uses the HTML block as its freeform content handler.

Unfortunately this results in paragraphs being automatically inserted into HTML block content.

Why?

The autop functionality was originally implemented to support the back compat of classic block content. The widget editor doesn't have a classic block and typically isn't used to manage post content / article style text, so the default behavior of the parser is meaningless.

How?

Adds an option to the parser. I think this is the lowest friction option.

This is a tricky issue to tackle because of the need for backwards compatibility. IMO the parser ideally wouldn't run autoP on content at all, this could have been part of the classic block from the start. But I don't think that can be changed now.

Alternatives

This could also be part of the setFreeformContentHandler function:

setFreeformContentHandler( 'core/html', { autop: false, commentDelimiters: true } );

@noisysocks Also mentioned an alternative - #33832 (comment)

But this seems more complex, because the parser doesn't know the difference between a paste and a normal parse. 🤔

Testing Instructions

  1. Go to Dashboard > Appearance > Widgets.
  2. Insert a Custom HTML Block into the footer and insert this code:
<div><p>some text</p>
<a href="http://www.test.com">link text</a>
</div>
<svg height="90" width="200">
  <text x="10" y="20" style="fill:red;">Several lines:
    <tspan x="10" y="45">First line.</tspan>
    <tspan x="10" y="70">Second line.</tspan>
  </text>
</svg> 
  1. Update and check it appears on the webpage and is correct.
  2. Go back to Dashboard and then back to Appearance > Widgets.
  3. Observe the Custom HTML code is preserved and unchanged.

In trunk: Observe the Custom HTML code has additional paragraph and line break tags.

Screenshots or screencast

Meaningless screenshot:
Screen Shot 2022-07-22 at 4 15 08 pm

talldan added 2 commits July 22, 2022 15:36

Verified

This commit was signed with the committer’s verified signature.
ndeloof Nicolas De loof
@talldan talldan added [Type] Bug An existing feature does not function as intended [Feature] Widgets Screen The block-based screen that replaced widgets.php. [Package] Edit Widgets /packages/edit-widgets [Feature] Widgets Customizer Ability to add and edit blocks in Customize → Widgets. labels Jul 22, 2022
@talldan talldan self-assigned this Jul 22, 2022
@talldan talldan requested a review from mcsf July 22, 2022 08:45
@talldan talldan changed the title Add configuration option to skip auto p on freeform blocks when parsing Add configuration option to skip auto p on freeform blocks when parsing blocks Jul 22, 2022
@talldan talldan changed the title Add configuration option to skip auto p on freeform blocks when parsing blocks Add configuration option to skip autop on freeform blocks when parsing blocks Jul 22, 2022
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github-actions bot commented Jul 22, 2022

Size Change: +39 B (0%)

Total Size: 1.26 MB

Filename Size Change
build/blocks/index.min.js 47.2 kB +11 B (0%)
build/customize-widgets/index.min.js 11.2 kB +13 B (0%)
build/edit-widgets/index.min.js 16.5 kB +15 B (0%)
ℹ️ View Unchanged
Filename Size
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@talldan
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talldan commented Jul 22, 2022

Something to note - when working on this, I wondered how the site editor works.

It turns out that the site editor supports inserting the classic block and has that configured as the freeform handler.

However, inserting a classic block results in the block crashing - #23086.

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Also mentioned an alternative - #33832 (comment)

But this seems more complex

I agree that there might be a "better" solution out there, but I sort of like how this PR is minimally invasive. It's essentially an escape hatch for advanced users.

(I'll mark this approved, but would like to see the param renamed per my suggestion!)

It's way too late now, but in 2018 we could have let the parser assume that we want autop if and only if fallbackBlockName === 'core/freeform' or something. :)

because the parser doesn't know the difference between a paste and a normal parse.

How is pasting generally handled in Widgets?

@talldan talldan force-pushed the fix/widget-editor-freeform-autop branch from 5337a73 to f5299c9 Compare July 25, 2022 04:18
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talldan commented Jul 25, 2022

Thanks for the review!

How is pasting generally handled in Widgets?

It uses the same raw handling code as other editors. This is where parse is called for pasted block content:

So the suggestion (#33832 (comment)) is possible, but I'm not sure how useful it would be outside of the widgets editor.

In contrast I think __unstableSkipAutop has the potential to be useful for non-WordPress block editor implementations.

@talldan talldan merged commit a32771f into trunk Jul 25, 2022
@talldan talldan deleted the fix/widget-editor-freeform-autop branch July 25, 2022 05:56
@github-actions github-actions bot added this to the Gutenberg 13.8 milestone Jul 25, 2022
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Nice, thanks for fixing this! But why __unstable? 😀

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Labels
[Feature] Widgets Customizer Ability to add and edit blocks in Customize → Widgets. [Feature] Widgets Screen The block-based screen that replaced widgets.php. [Package] Edit Widgets /packages/edit-widgets [Type] Bug An existing feature does not function as intended
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Widgets: HTML block is formatted using autop and has its attributes removed
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