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Add a new public method for getting the selector for a block #45505

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Add a new public method for getting the selector for a block #45505

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9ded201
Add new public method for block to selector lookup
ingeniumed Nov 3, 2022
643bd56
Re-write the public method so it doesn't depend on an internal method
ingeniumed Nov 3, 2022
0778151
Add some public documentation and clean it up a bit
ingeniumed Nov 3, 2022
5650f54
Cleanup based on internal comments the implementation so it's cleaner
ingeniumed Nov 3, 2022
fa97276
Fix the linting errors that were raised
ingeniumed Nov 3, 2022
2436e41
Merging with trunk and fixing conflicts
ingeniumed Nov 24, 2022
8560934
Merge branch 'WordPress:trunk' into add/new-blocks-metadata-method
ingeniumed Dec 15, 2022
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29 changes: 29 additions & 0 deletions lib/compat/wordpress-6.2/get-global-styles-and-settings.php
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Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,35 @@ function wp_theme_has_theme_json() {
}
}

if ( ! function_exists( 'wp_theme_get_css_selector_for_block' ) ) {
/**
* Lookup a CSS selector for the block provided, and return it if it exists.
*
* @param string $block_name The name of the block to lookup the CSS selector for.
*
* @return string|null the CSS selector for the block.
*/
function wp_theme_get_css_selector_for_block( $block_name ) {
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The theme and the block are unrelated, so it seems better to rename this to something along the lines of wp_block_get_css_selector.

Note this conversation. A block has more than one selector. This method should be able to retrieve any of the selectors provided by the block.

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It'd be good to update get_blocks_metadata to use this method as well. It'd give us feedback whether this is good in practice or not.

For example, I haven't really dug into this, but just thinking about reusing this method at get_blocks_metadata it struck me that an alternative to this PR could be adding a get_css_selector method to the WP_Block_Type class instead.

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The theme and the block are unrelated, so it seems better to rename this to something along the lines of wp_block_get_css_selector.

Naive question, should we be prefixing this with gutenberg_ prior to it landing in core?

Note this conversation. A block has more than one selector. This method should be able to retrieve any of the selectors provided by the block.

+1 on this comment. Not only can blocks have selectors on a root and per-block-support basis, in the near future we plan on allowing custom selectors for individual styles for example on the color's background.

The point above probably illustrates we'll get even more benefit in future from reusing the results of this PR.

an alternative to this PR could be adding a get_css_selector method to the WP_Block_Type class instead.

Sounds good to me 👍

$registry = WP_Block_Type_Registry::get_instance();
$blocks = $registry->get_all_registered();
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If the method is about a single block, we can use get_registered( $name ) instead.


if ( isset( $blocks[ $block_name ] ) ) {
$block = $blocks[ $block_name ];
if (
isset( $block->supports['__experimentalSelector'] ) &&
is_string( $block->supports['__experimentalSelector'] )
) {
return $block->supports['__experimentalSelector'];
} else {
return '.wp-block-' . str_replace( '/', '-', str_replace( 'core/', '', $block_name ) );
}
}

// Selector for the block was not found.
return null;
}
}

if ( ! function_exists( 'wp_theme_has_theme_json_clean_cache' ) ) {
/**
* Function to clean the cache used by wp_theme_has_theme_json method.
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