{
  "version": 3,
  "sources": ["../../../src/hooks/use-state-with-history/index.ts"],
  "sourcesContent": ["/**\n * WordPress dependencies\n */\nimport { createUndoManager } from '@wordpress/undo-manager';\nimport { useCallback, useReducer } from '@wordpress/element';\nimport type { UndoManager } from '@wordpress/undo-manager';\n\ntype UndoRedoState< T > = {\n\tmanager: UndoManager< T >;\n\tvalue: T;\n};\n\nfunction undoRedoReducer< T >(\n\tstate: UndoRedoState< T >,\n\taction:\n\t\t| { type: 'UNDO' }\n\t\t| { type: 'REDO' }\n\t\t| { type: 'RECORD'; value: T; isStaged: boolean }\n): UndoRedoState< T > {\n\tswitch ( action.type ) {\n\t\tcase 'UNDO': {\n\t\t\tconst undoRecord = state.manager.undo();\n\t\t\tif ( undoRecord ) {\n\t\t\t\treturn {\n\t\t\t\t\t...state,\n\t\t\t\t\tvalue: undoRecord[ 0 ].changes.prop.from,\n\t\t\t\t};\n\t\t\t}\n\t\t\treturn state;\n\t\t}\n\t\tcase 'REDO': {\n\t\t\tconst redoRecord = state.manager.redo();\n\t\t\tif ( redoRecord ) {\n\t\t\t\treturn {\n\t\t\t\t\t...state,\n\t\t\t\t\tvalue: redoRecord[ 0 ].changes.prop.to,\n\t\t\t\t};\n\t\t\t}\n\t\t\treturn state;\n\t\t}\n\t\tcase 'RECORD': {\n\t\t\tstate.manager.addRecord(\n\t\t\t\t[\n\t\t\t\t\t{\n\t\t\t\t\t\tid: 'object',\n\t\t\t\t\t\tchanges: {\n\t\t\t\t\t\t\tprop: { from: state.value, to: action.value },\n\t\t\t\t\t\t},\n\t\t\t\t\t},\n\t\t\t\t],\n\t\t\t\taction.isStaged\n\t\t\t);\n\t\t\treturn {\n\t\t\t\t...state,\n\t\t\t\tvalue: action.value,\n\t\t\t};\n\t\t}\n\t}\n\n\treturn state;\n}\n\nfunction initReducer< T >( value: T ) {\n\treturn {\n\t\tmanager: createUndoManager(),\n\t\tvalue,\n\t};\n}\n\n/**\n * useState with undo/redo history.\n *\n * @param initialValue Initial value.\n * @return Value, setValue, hasUndo, hasRedo, undo, redo.\n */\nexport default function useStateWithHistory< T >( initialValue: T ) {\n\tconst [ state, dispatch ] = useReducer(\n\t\tundoRedoReducer,\n\t\tinitialValue,\n\t\tinitReducer\n\t);\n\n\treturn {\n\t\tvalue: state.value,\n\t\tsetValue: useCallback( ( newValue: T, isStaged: boolean ) => {\n\t\t\tdispatch( {\n\t\t\t\ttype: 'RECORD',\n\t\t\t\tvalue: newValue,\n\t\t\t\tisStaged,\n\t\t\t} );\n\t\t}, [] ),\n\t\thasUndo: state.manager.hasUndo(),\n\t\thasRedo: state.manager.hasRedo(),\n\t\tundo: useCallback( () => {\n\t\t\tdispatch( { type: 'UNDO' } );\n\t\t}, [] ),\n\t\tredo: useCallback( () => {\n\t\t\tdispatch( { type: 'REDO' } );\n\t\t}, [] ),\n\t};\n}\n"],
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