@wordpress/block-library/build-module/list-item/hooks/use-merge.mjs.map

Block library for the WordPress editor.

{
  "version": 3,
  "sources": ["../../../src/list-item/hooks/use-merge.js"],
  "sourcesContent": ["/**\n * WordPress dependencies\n */\nimport { useRegistry, useDispatch, useSelect } from '@wordpress/data';\nimport { store as blockEditorStore } from '@wordpress/block-editor';\nimport { isUnmodifiedBlock } from '@wordpress/blocks';\n\n/**\n * Internal dependencies\n */\nimport useOutdentListItem from './use-outdent-list-item';\n\nexport default function useMerge( clientId, onMerge ) {\n\tconst registry = useRegistry();\n\tconst {\n\t\tgetPreviousBlockClientId,\n\t\tgetNextBlockClientId,\n\t\tgetBlockOrder,\n\t\tgetBlockRootClientId,\n\t\tgetBlockName,\n\t\tgetBlock,\n\t} = useSelect( blockEditorStore );\n\tconst { mergeBlocks, moveBlocksToPosition, removeBlock } =\n\t\tuseDispatch( blockEditorStore );\n\tconst outdentListItem = useOutdentListItem();\n\n\tfunction getTrailingId( id ) {\n\t\tconst order = getBlockOrder( id );\n\n\t\tif ( ! order.length ) {\n\t\t\treturn id;\n\t\t}\n\n\t\treturn getTrailingId( order[ order.length - 1 ] );\n\t}\n\n\tfunction getParentListItemId( id ) {\n\t\tconst listId = getBlockRootClientId( id );\n\t\tconst parentListItemId = getBlockRootClientId( listId );\n\t\tif ( ! parentListItemId ) {\n\t\t\treturn;\n\t\t}\n\t\tif ( getBlockName( parentListItemId ) !== 'core/list-item' ) {\n\t\t\treturn;\n\t\t}\n\t\treturn parentListItemId;\n\t}\n\n\t/**\n\t * Return the next list item with respect to the given list item. If none,\n\t * return the next list item of the parent list item if it exists.\n\t *\n\t * @param {string} id A list item client ID.\n\t * @return {?string} The client ID of the next list item.\n\t */\n\tfunction _getNextId( id ) {\n\t\tconst next = getNextBlockClientId( id );\n\t\tif ( next ) {\n\t\t\treturn next;\n\t\t}\n\t\tconst parentListItemId = getParentListItemId( id );\n\t\tif ( ! parentListItemId ) {\n\t\t\treturn;\n\t\t}\n\t\treturn _getNextId( parentListItemId );\n\t}\n\n\t/**\n\t * Given a client ID, return the client ID of the list item on the next\n\t * line, regardless of indentation level.\n\t *\n\t * @param {string} id The client ID of the current list item.\n\t * @return {?string} The client ID of the next list item.\n\t */\n\tfunction getNextId( id ) {\n\t\tconst order = getBlockOrder( id );\n\n\t\t// If the list item does not have a nested list, return the next list\n\t\t// item.\n\t\tif ( ! order.length ) {\n\t\t\treturn _getNextId( id );\n\t\t}\n\n\t\t// Get the first list item in the nested list.\n\t\treturn getBlockOrder( order[ 0 ] )[ 0 ];\n\t}\n\n\treturn ( forward ) => {\n\t\tfunction mergeWithNested( clientIdA, clientIdB ) {\n\t\t\tregistry.batch( () => {\n\t\t\t\t// When merging a sub list item with a higher next list item, we\n\t\t\t\t// also need to move any nested list items. Check if there's a\n\t\t\t\t// listed list, and append its nested list items to the current\n\t\t\t\t// list.\n\t\t\t\tconst [ nestedListClientId ] = getBlockOrder( clientIdB );\n\t\t\t\tif ( nestedListClientId ) {\n\t\t\t\t\t// If we are merging with the previous list item, and the\n\t\t\t\t\t// previous list item does not have nested list, move the\n\t\t\t\t\t// nested list to the previous list item.\n\t\t\t\t\tif (\n\t\t\t\t\t\tgetPreviousBlockClientId( clientIdB ) === clientIdA &&\n\t\t\t\t\t\t! getBlockOrder( clientIdA ).length\n\t\t\t\t\t) {\n\t\t\t\t\t\tmoveBlocksToPosition(\n\t\t\t\t\t\t\t[ nestedListClientId ],\n\t\t\t\t\t\t\tclientIdB,\n\t\t\t\t\t\t\tclientIdA\n\t\t\t\t\t\t);\n\t\t\t\t\t} else {\n\t\t\t\t\t\tmoveBlocksToPosition(\n\t\t\t\t\t\t\tgetBlockOrder( nestedListClientId ),\n\t\t\t\t\t\t\tnestedListClientId,\n\t\t\t\t\t\t\tgetBlockRootClientId( clientIdA )\n\t\t\t\t\t\t);\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\tmergeBlocks( clientIdA, clientIdB );\n\t\t\t} );\n\t\t}\n\n\t\tif ( forward ) {\n\t\t\tconst nextBlockClientId = getNextId( clientId );\n\n\t\t\tif ( ! nextBlockClientId ) {\n\t\t\t\tonMerge( forward );\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tif ( getParentListItemId( nextBlockClientId ) ) {\n\t\t\t\toutdentListItem( nextBlockClientId );\n\t\t\t} else {\n\t\t\t\tmergeWithNested( clientId, nextBlockClientId );\n\t\t\t}\n\t\t} else {\n\t\t\t// Merging is only done from the top level. For lowel levels, the\n\t\t\t// list item is outdented instead.\n\t\t\tif ( getParentListItemId( clientId ) ) {\n\t\t\t\toutdentListItem( clientId );\n\t\t\t\treturn;\n\t\t\t}\n\t\t\tconst previousBlockClientId = getPreviousBlockClientId( clientId );\n\t\t\tif ( previousBlockClientId ) {\n\t\t\t\tconst trailingId = getTrailingId( previousBlockClientId );\n\t\t\t\tmergeWithNested( trailingId, clientId );\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst blockOrder = getBlockOrder( clientId );\n\t\t\tif (\n\t\t\t\tisUnmodifiedBlock( getBlock( clientId ), 'content' ) &&\n\t\t\t\tblockOrder.length > 0\n\t\t\t) {\n\t\t\t\tregistry.batch( () => {\n\t\t\t\t\toutdentListItem( getBlockOrder( blockOrder[ 0 ] ) );\n\t\t\t\t\tremoveBlock( clientId, true );\n\t\t\t\t} );\n\t\t\t} else {\n\t\t\t\tonMerge( forward );\n\t\t\t}\n\t\t}\n\t};\n}\n"],
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