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Block Processor: add get_attribute_replacement(). #11130

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Block Processor: add get_attribute_replacement(). #11130

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47 changes: 47 additions & 0 deletions src/wp-includes/class-wp-block-processor.php
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Original file line number Diff line number Diff line change
Expand Up @@ -1891,6 +1891,53 @@ public function allocate_and_return_parsed_attributes(): ?array {
: null;
}

/**
* Returns an indicator for how to replace the attributes in the given block,
* including byte offsets for the replacement and full serialization of attributes.
*
* @since {WP_VERSION}
*
* @param array|null $new_attributes Serialize these attributes into the block.
* @return WP_HTML_Text_Replacement|null
*/
public function get_attribute_replacement( $new_attributes ): ?WP_HTML_Text_Replacement {
if ( self::MATCHED !== $this->state || ! in_array( $this->type, array( self::OPENER, self::CLOSER ), true ) ) {
return null;
}

if ( null === $new_attributes ) {
if ( 0 === $this->json_length ) {
return null;
}

$whitespace_length = strspn( $this->source_text, " \t\f\r\n", $this->json_at + $this->json_length + 1 );
return new WP_HTML_Text_Replacement(
$this->json_at,
$this->json_length + $whitespace_length,
''
);
}

$encoded_attributes = wp_json_encode( $new_attributes, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE );
$encoded_attributes = strtr(
$encoded_attributes,
array(
'\\\\' => '\u005c',
'--' => '\u002d\u002d',
'<' => '\u003c',
'>' => '\u003e',
'&' => '\u0026',
'\\"' => '\u0022',
)
);

return new WP_HTML_Text_Replacement(
$this->json_at,
$this->json_length,
$encoded_attributes
);
}

/**
* Returns the span representing the currently-matched delimiter, if matched, otherwise `null`.
*
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