{
  "version": 3,
  "sources": ["../../src/tabs/use-tab-list-sync.js"],
  "sourcesContent": ["/**\n * WordPress dependencies\n */\nimport { createBlock } from '@wordpress/blocks';\nimport { store as blockEditorStore } from '@wordpress/block-editor';\nimport { useDispatch } from '@wordpress/data';\nimport { useEffect, useRef } from '@wordpress/element';\n\n/**\n * Keep tabs and tab panels in sync when the lists change due to direct\n * user actions (deletion, paste, duplicate, drag-and-drop).\n *\n * Deletion: when one side shrinks, remove the counterpart at the same index.\n * Insertion: when one side grows without the other, insert the missing\n * counterpart at the matching index.\n *\n * When both lists change simultaneously (e.g. the \"Add Tab\" toolbar button,\n * which inserts both at once), no action is needed and the effect exits early.\n *\n * @param {Object}      props\n * @param {Array}       props.tabs              Raw core/tab block objects.\n * @param {Array}       props.tabPanels         Raw core/tab-panel block objects.\n * @param {string|null} props.tabPanelsClientId Client ID of the core/tab-panels block.\n * @param {string|null} props.tabsListClientId  Client ID of the core/tab-list block.\n */\nexport default function useTabListSync( {\n\ttabPanels,\n\ttabs,\n\ttabPanelsClientId,\n\ttabsListClientId,\n} ) {\n\tconst {\n\t\tremoveBlock,\n\t\tinsertBlocks,\n\t\treplaceInnerBlocks,\n\t\t__unstableMarkNextChangeAsNotPersistent,\n\t} = useDispatch( blockEditorStore );\n\n\tconst prevSyncStateRef = useRef( null );\n\tuseEffect( () => {\n\t\tif ( prevSyncStateRef.current === null ) {\n\t\t\tprevSyncStateRef.current = {\n\t\t\t\ttabPanels: [ ...tabPanels ],\n\t\t\t\ttabs: [ ...tabs ],\n\t\t\t};\n\t\t\treturn;\n\t\t}\n\n\t\tconst { tabPanels: prevTabPanels, tabs: prevTabs } =\n\t\t\tprevSyncStateRef.current;\n\n\t\tconst tabPanelCountChange = tabPanels.length - prevTabPanels.length;\n\t\tconst tabCountChange = tabs.length - prevTabs.length;\n\n\t\tconst tabPanelsInserted = tabPanelCountChange > 0;\n\t\tconst tabsInserted = tabCountChange > 0;\n\n\t\t// Both sides changed by the same amount.\n\t\t// Covers: no-op re-renders, \"Add Tab\" toolbar, and toolbar-remove.\n\t\t// Also handles drag-and-drop reordering of tabs.\n\t\tif ( tabPanelCountChange === tabCountChange ) {\n\t\t\t// When lengths are equal but order changed, the user reordered tabs\n\t\t\t// via drag-and-drop. Reorder the tab panel blocks to match.\n\t\t\tif (\n\t\t\t\ttabPanelCountChange === 0 &&\n\t\t\t\ttabPanelsClientId &&\n\t\t\t\ttabs.some( ( m, i ) => m.clientId !== prevTabs[ i ]?.clientId )\n\t\t\t) {\n\t\t\t\tconst reorderedTabPanels = tabs\n\t\t\t\t\t.map( ( tab ) => {\n\t\t\t\t\t\tconst oldIndex = prevTabs.findIndex(\n\t\t\t\t\t\t\t( pm ) => pm.clientId === tab.clientId\n\t\t\t\t\t\t);\n\t\t\t\t\t\treturn oldIndex !== -1 ? tabPanels[ oldIndex ] : null;\n\t\t\t\t\t} )\n\t\t\t\t\t.filter( Boolean );\n\t\t\t\tif ( reorderedTabPanels.length === tabPanels.length ) {\n\t\t\t\t\t__unstableMarkNextChangeAsNotPersistent();\n\t\t\t\t\treplaceInnerBlocks(\n\t\t\t\t\t\ttabPanelsClientId,\n\t\t\t\t\t\treorderedTabPanels,\n\t\t\t\t\t\tfalse\n\t\t\t\t\t);\n\t\t\t\t}\n\t\t\t}\n\t\t\tprevSyncStateRef.current = {\n\t\t\t\ttabPanels: [ ...tabPanels ],\n\t\t\t\ttabs: [ ...tabs ],\n\t\t\t};\n\t\t\treturn;\n\t\t}\n\n\t\t// Both sides changed in the same direction but by different amounts.\n\t\t// Bail without making a partial fix.\n\t\tif (\n\t\t\t( tabPanelCountChange > 0 && tabCountChange > 0 ) ||\n\t\t\t( tabPanelCountChange < 0 && tabCountChange < 0 )\n\t\t) {\n\t\t\tprevSyncStateRef.current = {\n\t\t\t\ttabPanels: [ ...tabPanels ],\n\t\t\t\ttabs: [ ...tabs ],\n\t\t\t};\n\t\t\treturn;\n\t\t}\n\n\t\t// If the required container block isn't available yet, bail without\n\t\t// updating the snapshot so the next render re-evaluates the same count change.\n\t\tif ( tabPanelsInserted && ! tabsListClientId ) {\n\t\t\treturn;\n\t\t}\n\t\tif ( tabsInserted && ! tabPanelsClientId ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Update snapshot to the current state.\n\t\tprevSyncStateRef.current = {\n\t\t\ttabPanels: [ ...tabPanels ],\n\t\t\ttabs: [ ...tabs ],\n\t\t};\n\n\t\tconst currentTabPanelIds = new Set(\n\t\t\ttabPanels.map( ( t ) => t.clientId )\n\t\t);\n\t\tconst currentTabIds = new Set( tabs.map( ( m ) => m.clientId ) );\n\n\t\tif ( tabPanelCountChange < 0 ) {\n\t\t\t// Remove the tab at the same position as each deleted tab panel.\n\t\t\tconst removedIndices = prevTabPanels\n\t\t\t\t.map( ( t, i ) =>\n\t\t\t\t\t! currentTabPanelIds.has( t.clientId ) ? i : -1\n\t\t\t\t)\n\t\t\t\t.filter( ( i ) => i !== -1 );\n\t\t\tconst removedSet = new Set( removedIndices );\n\t\t\tremovedIndices.forEach( ( removedIndex ) => {\n\t\t\t\tif ( tabs[ removedIndex ] ) {\n\t\t\t\t\t__unstableMarkNextChangeAsNotPersistent();\n\t\t\t\t\tremoveBlock( tabs[ removedIndex ].clientId, false );\n\t\t\t\t}\n\t\t\t} );\n\t\t\tprevSyncStateRef.current.tabs =\n\t\t\t\tprevSyncStateRef.current.tabs.filter(\n\t\t\t\t\t( _, i ) => ! removedSet.has( i )\n\t\t\t\t);\n\t\t} else if ( tabCountChange < 0 ) {\n\t\t\t// Remove the tab panel at the same position as each deleted tab.\n\t\t\tconst removedIndices = prevTabs\n\t\t\t\t.map( ( m, i ) =>\n\t\t\t\t\t! currentTabIds.has( m.clientId ) ? i : -1\n\t\t\t\t)\n\t\t\t\t.filter( ( i ) => i !== -1 );\n\t\t\tconst removedSet = new Set( removedIndices );\n\t\t\tremovedIndices.forEach( ( removedIndex ) => {\n\t\t\t\tif ( tabPanels[ removedIndex ] ) {\n\t\t\t\t\t__unstableMarkNextChangeAsNotPersistent();\n\t\t\t\t\tremoveBlock( tabPanels[ removedIndex ].clientId, false );\n\t\t\t\t}\n\t\t\t} );\n\t\t\tprevSyncStateRef.current.tabPanels =\n\t\t\t\tprevSyncStateRef.current.tabPanels.filter(\n\t\t\t\t\t( _, i ) => ! removedSet.has( i )\n\t\t\t\t);\n\t\t} else if ( tabPanelsInserted ) {\n\t\t\t// A tab panel was pasted or duplicated \u2014 insert a matching tab.\n\t\t\tconst prevTabPanelIds = new Set(\n\t\t\t\tprevTabPanels.map( ( t ) => t.clientId )\n\t\t\t);\n\t\t\tconst newTabs = tabPanels\n\t\t\t\t.map( ( tabPanel, tabPanelIndex ) =>\n\t\t\t\t\t! prevTabPanelIds.has( tabPanel.clientId )\n\t\t\t\t\t\t? {\n\t\t\t\t\t\t\t\ttabPanelIndex,\n\t\t\t\t\t\t\t\tblock: createBlock( 'core/tab', {} ),\n\t\t\t\t\t\t  }\n\t\t\t\t\t\t: null\n\t\t\t\t)\n\t\t\t\t.filter( Boolean );\n\n\t\t\tif ( newTabs.length > 0 ) {\n\t\t\t\t__unstableMarkNextChangeAsNotPersistent();\n\t\t\t\tinsertBlocks(\n\t\t\t\t\tnewTabs.map( ( { block } ) => block ),\n\t\t\t\t\tnewTabs[ 0 ].tabPanelIndex,\n\t\t\t\t\ttabsListClientId,\n\t\t\t\t\tfalse\n\t\t\t\t);\n\t\t\t\tnewTabs.forEach( ( { tabPanelIndex, block } ) => {\n\t\t\t\t\tprevSyncStateRef.current.tabs.splice( tabPanelIndex, 0, {\n\t\t\t\t\t\tclientId: block.clientId,\n\t\t\t\t\t} );\n\t\t\t\t} );\n\t\t\t}\n\t\t} else if ( tabsInserted ) {\n\t\t\t// A tab was pasted or duplicated \u2014 insert a matching tab panels,\n\t\t\t// copying the label from the adjacent tab panel.\n\t\t\tconst prevTabIds = new Set( prevTabs.map( ( m ) => m.clientId ) );\n\t\t\tconst newTabPanels = tabs\n\t\t\t\t.map( ( tab, tabIndex ) => {\n\t\t\t\t\tif ( prevTabIds.has( tab.clientId ) ) {\n\t\t\t\t\t\treturn null;\n\t\t\t\t\t}\n\t\t\t\t\tconst label =\n\t\t\t\t\t\ttabPanels[ tabIndex - 1 ]?.attributes?.label ??\n\t\t\t\t\t\ttabPanels[ tabIndex ]?.attributes?.label ??\n\t\t\t\t\t\t'';\n\t\t\t\t\treturn {\n\t\t\t\t\t\ttabIndex,\n\t\t\t\t\t\tblock: createBlock( 'core/tab-panel', { label } ),\n\t\t\t\t\t};\n\t\t\t\t} )\n\t\t\t\t.filter( Boolean );\n\n\t\t\tif ( newTabPanels.length > 0 ) {\n\t\t\t\t__unstableMarkNextChangeAsNotPersistent();\n\t\t\t\tinsertBlocks(\n\t\t\t\t\tnewTabPanels.map( ( { block } ) => block ),\n\t\t\t\t\tnewTabPanels[ 0 ].tabIndex,\n\t\t\t\t\ttabPanelsClientId,\n\t\t\t\t\tfalse\n\t\t\t\t);\n\t\t\t\tnewTabPanels.forEach( ( { tabIndex, block } ) => {\n\t\t\t\t\tprevSyncStateRef.current.tabPanels.splice( tabIndex, 0, {\n\t\t\t\t\t\tclientId: block.clientId,\n\t\t\t\t\t} );\n\t\t\t\t} );\n\t\t\t}\n\t\t}\n\t}, [\n\t\ttabPanels,\n\t\ttabs,\n\t\tremoveBlock,\n\t\tinsertBlocks,\n\t\treplaceInnerBlocks,\n\t\t__unstableMarkNextChangeAsNotPersistent,\n\t\ttabsListClientId,\n\t\ttabPanelsClientId,\n\t] );\n}\n"],
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