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Update: Guard against null block in off canvas editor. #46594

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merged 2 commits into from
Dec 16, 2022
Merged

Update: Guard against null block in off canvas editor. #46594

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529c4aa
Update: Guard against null block in off canvas editor.
jorgefilipecosta Dec 15, 2022
645be9a
Change code order to comply with lint rules.
jorgefilipecosta Dec 15, 2022
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116 changes: 60 additions & 56 deletions packages/block-editor/src/components/off-canvas-editor/block.js
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Original file line number Diff line number Diff line change
Expand Up @@ -95,15 +95,68 @@ function ListViewBlock( {
[ clientId ]
);

// If ListView has experimental features related to the Persistent List View,
// only focus the selected list item on mount; otherwise the list would always
// try to steal the focus from the editor canvas.
useEffect( () => {
if ( ! isTreeGridMounted && isSelected ) {
cellRef.current.focus();
}
}, [] );

const onMouseEnter = useCallback( () => {
setIsHovered( true );
toggleBlockHighlight( clientId, true );
}, [ clientId, setIsHovered, toggleBlockHighlight ] );
const onMouseLeave = useCallback( () => {
setIsHovered( false );
toggleBlockHighlight( clientId, false );
}, [ clientId, setIsHovered, toggleBlockHighlight ] );

const selectEditorBlock = useCallback(
( event ) => {
selectBlock( event, clientId );
event.preventDefault();
},
[ clientId, selectBlock ]
);

const updateSelection = useCallback(
( newClientId ) => {
selectBlock( undefined, newClientId );
},
[ selectBlock ]
);

const { isTreeGridMounted, expand, collapse } = useListViewContext();

const toggleExpanded = useCallback(
( event ) => {
// Prevent shift+click from opening link in a new window when toggling.
event.preventDefault();
event.stopPropagation();
if ( isExpanded === true ) {
collapse( clientId );
} else if ( isExpanded === false ) {
expand( clientId );
}
},
[ clientId, expand, collapse, isExpanded ]
);

const instanceId = useInstanceId( ListViewBlock );

if ( ! block ) {
return null;
}

// When a block hides its toolbar it also hides the block settings menu,
// since that menu is part of the toolbar in the editor canvas.
// List View respects this by also hiding the block settings menu.
const showBlockActions = hasBlockSupport(
block.name,
'__experimentalToolbar',
true
);
const instanceId = useInstanceId( ListViewBlock );
const showBlockActions =
!! block &&
hasBlockSupport( block.name, '__experimentalToolbar', true );

const descriptionId = `list-view-block-select-button__${ instanceId }`;
const blockPositionDescription = getBlockPositionDescription(
position,
Expand Down Expand Up @@ -142,9 +195,7 @@ function ListViewBlock( {
)
: __( 'Edit' );

const { isTreeGridMounted, expand, collapse } = useListViewContext();

const isEditable = block.name !== 'core/page-list-item';
const isEditable = !! block && block.name !== 'core/page-list-item';
const hasSiblings = siblingBlockCount > 0;
const hasRenderedMovers = showBlockMovers && hasSiblings;
const moverCellClassName = classnames(
Expand All @@ -162,53 +213,6 @@ function ListViewBlock( {
{ 'is-visible': isHovered || isFirstSelectedBlock }
);

// If ListView has experimental features related to the Persistent List View,
// only focus the selected list item on mount; otherwise the list would always
// try to steal the focus from the editor canvas.
useEffect( () => {
if ( ! isTreeGridMounted && isSelected ) {
cellRef.current.focus();
}
}, [] );

const onMouseEnter = useCallback( () => {
setIsHovered( true );
toggleBlockHighlight( clientId, true );
}, [ clientId, setIsHovered, toggleBlockHighlight ] );
const onMouseLeave = useCallback( () => {
setIsHovered( false );
toggleBlockHighlight( clientId, false );
}, [ clientId, setIsHovered, toggleBlockHighlight ] );

const selectEditorBlock = useCallback(
( event ) => {
selectBlock( event, clientId );
event.preventDefault();
},
[ clientId, selectBlock ]
);

const updateSelection = useCallback(
( newClientId ) => {
selectBlock( undefined, newClientId );
},
[ selectBlock ]
);

const toggleExpanded = useCallback(
( event ) => {
// Prevent shift+click from opening link in a new window when toggling.
event.preventDefault();
event.stopPropagation();
if ( isExpanded === true ) {
collapse( clientId );
} else if ( isExpanded === false ) {
expand( clientId );
}
},
[ clientId, expand, collapse, isExpanded ]
);

let colSpan;
if ( hasRenderedMovers ) {
colSpan = 2;
Expand Down