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Preserve controlled inner blocks on RESET_BLOCKS #61524

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Preserve controlled inner blocks on RESET_BLOCKS #61524

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39 changes: 1 addition & 38 deletions packages/block-editor/src/components/provider/use-block-sync.js
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@
* WordPress dependencies
*/
import { useEffect, useRef } from '@wordpress/element';
import { useRegistry, useSelect } from '@wordpress/data';
import { useRegistry } from '@wordpress/data';
import { cloneBlock } from '@wordpress/blocks';

/**
Expand Down Expand Up @@ -82,15 +82,6 @@ export default function useBlockSync( {
} = registry.dispatch( blockEditorStore );
const { getBlockName, getBlocks, getSelectionStart, getSelectionEnd } =
registry.select( blockEditorStore );
const isControlled = useSelect(
( select ) => {
return (
! clientId ||
select( blockEditorStore ).areInnerBlocksControlled( clientId )
);
},
[ clientId ]
);

const pendingChanges = useRef( { incoming: null, outgoing: [] } );
const subscribed = useRef( false );
Expand Down Expand Up @@ -186,29 +177,11 @@ export default function useBlockSync( {
}
}, [ controlledBlocks, clientId ] );

const isMounted = useRef( false );

useEffect( () => {
// On mount, controlled blocks are already set in the effect above.
if ( ! isMounted.current ) {
isMounted.current = true;
return;
}

// When the block becomes uncontrolled, it means its inner state has been reset
// we need to take the blocks again from the external value property.
if ( ! isControlled ) {
pendingChanges.current.outgoing = [];
setControlledBlocks();
}
}, [ isControlled ] );

useEffect( () => {
const {
getSelectedBlocksInitialCaretPosition,
isLastBlockChangePersistent,
__unstableIsLastBlockChangeIgnored,
areInnerBlocksControlled,
} = registry.select( blockEditorStore );

let blocks = getBlocks( clientId );
Expand All @@ -228,16 +201,6 @@ export default function useBlockSync( {
return;
}

// When RESET_BLOCKS on parent blocks get called, the controlled blocks
// can reset to uncontrolled, in these situations, it means we need to populate
// the blocks again from the external blocks (the value property here)
// and we should stop triggering onChange
const isStillControlled =
! clientId || areInnerBlocksControlled( clientId );
if ( ! isStillControlled ) {
return;
}

const newIsPersistent = isLastBlockChangePersistent();
const newBlocks = getBlocks( clientId );
const areBlocksDifferent = newBlocks !== blocks;
Expand Down
33 changes: 24 additions & 9 deletions packages/block-editor/src/store/reducer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -592,16 +592,31 @@ const withBlockReset = ( reducer ) => ( state, action ) => {
if ( action.type === 'RESET_BLOCKS' ) {
const newState = {
...state,
byClientId: new Map(
getFlattenedBlocksWithoutAttributes( action.blocks )
),
attributes: new Map( getFlattenedBlockAttributes( action.blocks ) ),
order: mapBlockOrder( action.blocks ),
parents: new Map( mapBlockParents( action.blocks ) ),
controlledInnerBlocks: {},
byClientId: new Map( state?.byClientId ),
attributes: new Map( state?.attributes ),
order: new Map( state?.order ),
parents: new Map( state?.parents ),
tree: new Map( state?.tree ),
controlledInnerBlocks: state?.controlledInnerBlocks ?? {},
};

newState.tree = new Map( state?.tree );
for ( const [ key, value ] of getFlattenedBlocksWithoutAttributes(
action.blocks
) ) {
newState.byClientId.set( key, value );
}
for ( const [ key, value ] of getFlattenedBlockAttributes(
action.blocks
) ) {
newState.attributes.set( key, value );
}
for ( const [ key, value ] of mapBlockOrder( action.blocks ) ) {
if ( ! newState.controlledInnerBlocks[ key ] ) {
newState.order.set( key, value );
}
}
for ( const [ key, value ] of mapBlockParents( action.blocks ) ) {
newState.parents.set( key, value );
}
updateBlockTreeForBlocks( newState, action.blocks );
newState.tree.set( '', {
innerBlocks: action.blocks.map( ( subBlock ) =>
Expand Down
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