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Support skipping serialization in the color hook (block supports mechanism) #29142

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merged 5 commits into from
Feb 19, 2021

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oandregal
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@oandregal oandregal commented Feb 19, 2021

This PR implements the first step in supporting a more fine-grained block supports mechanism as described at #28913

Follow-up PRs should be created to migrate specific blocks to use this. The testing steps illustrate a use case for this: make the social links use the colors from the block support mechanism, so they are exposed from theme.json.

How has this been tested?

Using the TT1-blocks:

  1. Add this to the block supports of the social links:
"color": {
  "__experimentalSkipSerialization": true
},
"__experimentalSelector": ".wp-social-link"
  1. Compile this branch.

  2. Go to the post editor and create a social links block with some icons:

  • Verify that it has a new "colors panel" in the post editor.
  • Select a text color and a background color. Block styles shouldn't be affected (no new classes on inline styles are added for text and background colors). A follow-up PR should update the block to use these instead of the existing custom controls.
  • Open the code editor and verify that the block has the textColor and backgroundColor attributes and they have the same value as the color you selected.
  1. Go to the site editor and create a social links block with some icons:
  • Verify that the social links panel in the global styles sidebar has the color panel.
  • Select a text and background color. Nothing should happen due to block styles specificity that should be updated in a follow-up PR.
  • Go to the browser inspector and unselect the CSS rules that are affecting the icon color. You should see the new colors applied.

Dynamic blocks that do not want serialization
could avoid it by not calling get_block_wrapper_attributes.
However, there may be cases in which some attributes
should be serialized and others should not.
@oandregal oandregal self-assigned this Feb 19, 2021
@oandregal oandregal added the Global Styles Anything related to the broader Global Styles efforts, including Styles Engine and theme.json label Feb 19, 2021
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Size Change: +260 B (0%)

Total Size: 1.38 MB

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compressed-size-action

@oandregal
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One thing I've noticed by trying this out in the social links block is that the current color panel uses "Icon color" and "Icon background color" as names while the block supports mechanism uses "Text color" and "Background color" (and doesn't allow blocks to change it), see:

Social Links Color Panel Color Panel created by the block supports
Captura de ecrã de 2021-02-19 12-40-45 Captura de ecrã de 2021-02-19 12-40-53

Given the current direction (allow the serialization from block attributes => DOM to be up to the block), I think we need the ability for blocks to change the names of this as well.

Was thinking about how to integrate this into the supports mechanism. We are also going to need to declare "selectors" per property as per #28913

"color": {
  "gradients": true,
  "meta": {
    "skipSerialization": true,
    "textColor": "Name to use for the text color panel",
    "backgroundColor": "Name to use for the background color panel",
    "gradientColor": "Name to use for the gradients color panel",
    "selector": ".wp-social-links" // Selector that is specific to the color property.
  }
},

@youknowriad
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I'm not sure I like the "meta" indirection. The labels could be just textColorLabel, backgroundColorLabel or something like that

@oandregal
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@youknowriad makes sense. So, this should be ready to land then. I can work on adding the labels and selectors as follow-ups PRs, to keep PRs very small and focused to reduce the reviewer's time required to land them.

@oandregal
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I've added the list of tasks at #28913 Will keep it updated as things evolve.

@@ -60,6 +60,14 @@ function gutenberg_register_colors_support( $block_type ) {
*/
function gutenberg_apply_colors_support( $block_type, $block_attributes ) {
$color_support = gutenberg_experimental_get( $block_type->supports, array( 'color' ), false );

if ( array_key_exists( 'skipSerialization', $color_support ) && $color_support['skipSerialization'] ) {
return array(
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We can probably return an empty array here, don't you think?

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Oh, yes, it doesn't make sense as it was. Fixed in 29d4578

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This is looking good to me, I was wondering whether we should start using an experimental flag or maybe this is something we're certain of at this point?

@oandregal
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This is looking good to me, I was wondering whether we should start using an experimental flag or maybe this is something we're certain of at this point?

You mean __experimentalSkipSerialization? Yeah, probably makes more sense.

@oandregal
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I will push that change after lunch and will merge.

@oandregal oandregal merged commit ca2923d into master Feb 19, 2021
@oandregal oandregal deleted the try/block-supports-skip-serialization branch February 19, 2021 15:53
@github-actions github-actions bot added this to the Gutenberg 10.1 milestone Feb 19, 2021
@oandregal oandregal changed the title Try: skip serialization in the block supports mechanism Support skipping serialization in the color hook (block supports mechanism) Feb 22, 2021
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