@wordpress/block-library/build/table-of-contents/hooks.cjs.map

Block library for the WordPress editor.

{
  "version": 3,
  "sources": ["../../src/table-of-contents/hooks.js"],
  "sourcesContent": ["/**\n * External dependencies\n */\nimport fastDeepEqual from 'fast-deep-equal/es6/index.js';\n\n/**\n * WordPress dependencies\n */\nimport { useRegistry } from '@wordpress/data';\nimport { __unstableStripHTML as stripHTML } from '@wordpress/dom';\nimport { useEffect } from '@wordpress/element';\nimport { addQueryArgs, removeQueryArgs } from '@wordpress/url';\nimport { store as blockEditorStore } from '@wordpress/block-editor';\n\nfunction getLatestHeadings( select, clientId ) {\n\tconst {\n\t\tgetBlockAttributes,\n\t\tgetBlockName,\n\t\tgetBlocksByName,\n\t\tgetClientIdsOfDescendants,\n\t} = select( blockEditorStore );\n\n\t// FIXME: @wordpress/block-library should not depend on @wordpress/editor.\n\t// Blocks can be loaded into a *non-post* block editor, so to avoid\n\t// declaring @wordpress/editor as a dependency, we must access its\n\t// store by string. When the store is not available, editorSelectors\n\t// will be null, and the block's saved markup will lack permalinks.\n\tconst permalink = select( 'core/editor' ).getPermalink() ?? null;\n\n\tconst isPaginated = getBlocksByName( 'core/nextpage' ).length !== 0;\n\tconst { onlyIncludeCurrentPage, maxLevel } =\n\t\tgetBlockAttributes( clientId ) ?? {};\n\n\t// Get post-content block client ID.\n\tconst [ postContentClientId = '' ] = getBlocksByName( 'core/post-content' );\n\n\t// Get the client ids of all blocks in the editor.\n\tconst allBlockClientIds = getClientIdsOfDescendants( postContentClientId );\n\n\t// If onlyIncludeCurrentPage is true, calculate the page (of a paginated post) this block is part of, so we know which headings to include; otherwise, skip the calculation.\n\tlet tocPage = 1;\n\n\tif ( isPaginated && onlyIncludeCurrentPage ) {\n\t\t// We can't use getBlockIndex because it only returns the index\n\t\t// relative to sibling blocks.\n\t\tconst tocIndex = allBlockClientIds.indexOf( clientId );\n\n\t\tfor ( const [\n\t\t\tblockIndex,\n\t\t\tblockClientId,\n\t\t] of allBlockClientIds.entries() ) {\n\t\t\t// If we've reached blocks after the Table of Contents, we've\n\t\t\t// finished calculating which page the block is on.\n\t\t\tif ( blockIndex >= tocIndex ) {\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tif ( getBlockName( blockClientId ) === 'core/nextpage' ) {\n\t\t\t\ttocPage++;\n\t\t\t}\n\t\t}\n\t}\n\n\tconst latestHeadings = [];\n\n\t/** The page (of a paginated post) a heading will be part of. */\n\tlet headingPage = 1;\n\tlet headingPageLink = null;\n\n\t// If the core/editor store is available, we can add permalinks to the\n\t// generated table of contents.\n\tif ( typeof permalink === 'string' ) {\n\t\theadingPageLink = isPaginated\n\t\t\t? addQueryArgs( permalink, { page: headingPage } )\n\t\t\t: permalink;\n\t}\n\n\tfor ( const blockClientId of allBlockClientIds ) {\n\t\tconst blockName = getBlockName( blockClientId );\n\t\tif ( blockName === 'core/nextpage' ) {\n\t\t\theadingPage++;\n\n\t\t\t// If we're only including headings from the current page (of\n\t\t\t// a paginated post), then exit the loop if we've reached the\n\t\t\t// pages after the one with the Table of Contents block.\n\t\t\tif ( onlyIncludeCurrentPage && headingPage > tocPage ) {\n\t\t\t\tbreak;\n\t\t\t}\n\n\t\t\tif ( typeof permalink === 'string' ) {\n\t\t\t\theadingPageLink = addQueryArgs(\n\t\t\t\t\tremoveQueryArgs( permalink, [ 'page' ] ),\n\t\t\t\t\t{ page: headingPage }\n\t\t\t\t);\n\t\t\t}\n\t\t}\n\t\t// If we're including all headings or we've reached headings on\n\t\t// the same page as the Table of Contents block, add them to the\n\t\t// list.\n\t\telse if ( ! onlyIncludeCurrentPage || headingPage === tocPage ) {\n\t\t\tif ( blockName === 'core/heading' ) {\n\t\t\t\tconst headingAttributes = getBlockAttributes( blockClientId );\n\n\t\t\t\t// Skip headings that are deeper than maxLevel\n\t\t\t\tif ( maxLevel && headingAttributes.level > maxLevel ) {\n\t\t\t\t\tcontinue;\n\t\t\t\t}\n\n\t\t\t\tconst canBeLinked =\n\t\t\t\t\ttypeof headingPageLink === 'string' &&\n\t\t\t\t\ttypeof headingAttributes.anchor === 'string' &&\n\t\t\t\t\theadingAttributes.anchor !== '';\n\n\t\t\t\tlatestHeadings.push( {\n\t\t\t\t\t// Convert line breaks to spaces, and get rid of HTML tags in the headings.\n\t\t\t\t\tcontent: stripHTML(\n\t\t\t\t\t\theadingAttributes.content.replace(\n\t\t\t\t\t\t\t/(<br *\\/?>)+/g,\n\t\t\t\t\t\t\t' '\n\t\t\t\t\t\t)\n\t\t\t\t\t),\n\t\t\t\t\tlevel: headingAttributes.level,\n\t\t\t\t\tlink: canBeLinked\n\t\t\t\t\t\t? `${ headingPageLink }#${ headingAttributes.anchor }`\n\t\t\t\t\t\t: null,\n\t\t\t\t} );\n\t\t\t}\n\t\t}\n\t}\n\n\treturn latestHeadings;\n}\n\nfunction observeCallback( select, dispatch, clientId ) {\n\tconst { getBlockAttributes } = select( blockEditorStore );\n\tconst { updateBlockAttributes, __unstableMarkNextChangeAsNotPersistent } =\n\t\tdispatch( blockEditorStore );\n\n\t/**\n\t * If the block no longer exists in the store, skip the update.\n\t * The \"undo\" action recreates the block and provides a new `clientId`.\n\t * The hook still might be observing the changes while the old block unmounts.\n\t */\n\tconst attributes = getBlockAttributes( clientId );\n\tif ( attributes === null ) {\n\t\treturn;\n\t}\n\n\tconst headings = getLatestHeadings( select, clientId );\n\tif ( ! fastDeepEqual( headings, attributes.headings ) ) {\n\t\t// Executing the update in a microtask ensures that the non-persistent marker doesn't affect an attribute triggering the change.\n\t\twindow.queueMicrotask( () => {\n\t\t\t__unstableMarkNextChangeAsNotPersistent();\n\t\t\tupdateBlockAttributes( clientId, { headings } );\n\t\t} );\n\t}\n}\n\nexport function useObserveHeadings( clientId ) {\n\tconst registry = useRegistry();\n\tuseEffect( () => {\n\t\t// Todo: Limit subscription to block editor store when data no longer depends on `getPermalink`.\n\t\t// See: https://github.com/WordPress/gutenberg/pull/45513\n\t\treturn registry.subscribe( () =>\n\t\t\tobserveCallback( registry.select, registry.dispatch, clientId )\n\t\t);\n\t}, [ registry, clientId ] );\n}\n"],
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  "names": ["blockEditorStore", "stripHTML", "fastDeepEqual"]
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