@wordpress/block-editor
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{
"version": 3,
"sources": ["../../src/hooks/metadata.js"],
"sourcesContent": ["/**\n * WordPress dependencies\n */\nimport { addFilter } from '@wordpress/hooks';\nimport { hasBlockSupport } from '@wordpress/blocks';\n\nconst META_ATTRIBUTE_NAME = 'metadata';\n\n/**\n * Filters registered block settings, extending attributes to include `metadata`.\n *\n * see: https://github.com/WordPress/gutenberg/pull/40393/files#r864632012\n *\n * @param {Object} blockTypeSettings Original block settings.\n * @return {Object} Filtered block settings.\n */\nexport function addMetaAttribute( blockTypeSettings ) {\n\t// Allow blocks to specify their own attribute definition with default values if needed.\n\tif ( blockTypeSettings?.attributes?.[ META_ATTRIBUTE_NAME ]?.type ) {\n\t\treturn blockTypeSettings;\n\t}\n\n\tblockTypeSettings.attributes = {\n\t\t...blockTypeSettings.attributes,\n\t\t[ META_ATTRIBUTE_NAME ]: {\n\t\t\ttype: 'object',\n\t\t},\n\t};\n\n\treturn blockTypeSettings;\n}\n\n/**\n * Add metadata transforms.\n *\n * @param {Object} result The transformed block.\n * @param {Array} source Original blocks transformed.\n * @param {number} index Index of the transformed block.\n * @param {Array} results All blocks that resulted from the transformation.\n * @return {Object} Modified transformed block.\n */\nexport function addTransforms( result, source, index, results ) {\n\t// If the condition verifies we are probably in the presence of a wrapping transform\n\t// e.g: nesting paragraphs in a group or columns and in that case the metadata should not be kept.\n\tif ( results.length === 1 && result.innerBlocks.length === source.length ) {\n\t\treturn result;\n\t}\n\n\t// If we are transforming one block to multiple blocks or multiple blocks to one block,\n\t// we ignore the metadata during the transform.\n\tif (\n\t\t( results.length === 1 && source.length > 1 ) ||\n\t\t( results.length > 1 && source.length === 1 )\n\t) {\n\t\treturn result;\n\t}\n\n\t// If we are transforming multiple blocks to multiple blocks with different counts,\n\t// we ignore the metadata during the transform.\n\tif (\n\t\tresults.length > 1 &&\n\t\tsource.length > 1 &&\n\t\tresults.length !== source.length\n\t) {\n\t\treturn result;\n\t}\n\n\tconst sourceMetadata = source[ index ]?.attributes?.metadata;\n\n\tif ( ! sourceMetadata ) {\n\t\treturn result;\n\t}\n\n\tconst preservedMetadata = {};\n\n\t// Notes\n\tif ( sourceMetadata.noteId && ! result.attributes?.metadata?.noteId ) {\n\t\tpreservedMetadata.noteId = sourceMetadata.noteId;\n\t}\n\n\t// Custom name\n\tif (\n\t\tsourceMetadata.name &&\n\t\t! result.attributes?.metadata?.name &&\n\t\thasBlockSupport( result.name, 'renaming', true )\n\t) {\n\t\tpreservedMetadata.name = sourceMetadata.name;\n\t}\n\n\t// Block visibility\n\tif (\n\t\tsourceMetadata.blockVisibility !== undefined &&\n\t\t! result.attributes?.metadata?.blockVisibility &&\n\t\thasBlockSupport( result.name, 'visibility', true )\n\t) {\n\t\tpreservedMetadata.blockVisibility = sourceMetadata.blockVisibility;\n\t}\n\n\tif ( Object.keys( preservedMetadata ).length > 0 ) {\n\t\treturn {\n\t\t\t...result,\n\t\t\tattributes: {\n\t\t\t\t...result.attributes,\n\t\t\t\tmetadata: {\n\t\t\t\t\t...result.attributes.metadata,\n\t\t\t\t\t...preservedMetadata,\n\t\t\t\t},\n\t\t\t},\n\t\t};\n\t}\n\treturn result;\n}\n\naddFilter(\n\t'blocks.registerBlockType',\n\t'core/metadata/addMetaAttribute',\n\taddMetaAttribute\n);\n\naddFilter(\n\t'blocks.switchToBlockType.transformedBlock',\n\t'core/metadata/addTransforms',\n\taddTransforms\n);\n"],
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