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Block Library: Implement drag handles for columns resizing
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| /** | ||
| * External dependencies | ||
| */ | ||
| import { forEach, find, difference, over } from 'lodash'; | ||
| import classnames from 'classnames'; | ||
|
|
||
| /** | ||
| * WordPress dependencies | ||
| */ | ||
| import { useSelect, withDispatch } from '@wordpress/data'; | ||
| import { ResizableBox } from '@wordpress/components'; | ||
| import { useState } from '@wordpress/element'; | ||
|
|
||
| /** | ||
| * Internal dependencies | ||
| */ | ||
| import { | ||
| getEffectiveColumnWidth, | ||
| toWidthPrecision, | ||
| getTotalColumnsWidth, | ||
| getColumnWidths, | ||
| getAdjacentBlocks, | ||
| getRedistributedColumnWidths, | ||
| } from './utils'; | ||
|
|
||
| function ColumnsResizer( { | ||
| clientId, | ||
| toggleSelection, | ||
| updateBlockAttributes, | ||
| } ) { | ||
| const [ activeResizeClientId, setActiveResizeClientId ] = useState( null ); | ||
|
|
||
| const { columns } = useSelect( ( select ) => ( { | ||
| columns: select( 'core/block-editor' ).getBlocks( clientId ), | ||
| } ), [ clientId ] ); | ||
|
|
||
| const classes = classnames( 'wp-block-columns__resizer', { | ||
| 'is-resizing': activeResizeClientId !== null, | ||
| } ); | ||
|
|
||
| return ( | ||
| <div className={ classes }> | ||
| { columns.map( ( column, index ) => { | ||
| const width = getEffectiveColumnWidth( column, columns.length ); | ||
|
|
||
| function onResizeStop( event, direction, element ) { | ||
| const nextWidth = toWidthPrecision( parseFloat( element.style.width ) ); | ||
| const adjacentColumns = getAdjacentBlocks( columns, column.clientId ); | ||
|
|
||
| // The occupied width is calculated as the sum of the new width | ||
| // and the total width of blocks _not_ in the adjacent set. | ||
| const occupiedWidth = nextWidth + getTotalColumnsWidth( | ||
| difference( columns, [ | ||
| find( columns, { clientId: column.clientId } ), | ||
| ...adjacentColumns, | ||
| ] ) | ||
| ); | ||
|
|
||
| // Compute _all_ next column widths, in case the updated column | ||
| // is in the middle of a set of columns which don't yet have | ||
| // any explicit widths assigned (include updates to those not | ||
| // part of the adjacent blocks). | ||
| const nextColumnWidths = { | ||
| ...getColumnWidths( columns, columns.length ), | ||
| [ column.clientId ]: nextWidth, | ||
| ...getRedistributedColumnWidths( adjacentColumns, 100 - occupiedWidth, columns.length ), | ||
| }; | ||
|
|
||
| forEach( nextColumnWidths, ( nextColumnWidth, columnClientId ) => { | ||
| updateBlockAttributes( columnClientId, { width: nextColumnWidth } ); | ||
| } ); | ||
| } | ||
|
|
||
| return ( | ||
| <ResizableBox | ||
| key={ column.clientId } | ||
| enable={ { | ||
| right: index !== columns.length - 1, | ||
| } } | ||
| size={ { width: width + '%' } } | ||
| axis="x" | ||
| onResizeStart={ over( [ | ||
| () => setActiveResizeClientId( column.clientId ), | ||
| () => toggleSelection( false ), | ||
| ] ) } | ||
| onResizeStop={ over( [ | ||
| () => setActiveResizeClientId( null ), | ||
| () => toggleSelection( true ), | ||
| onResizeStop, | ||
| ] ) } | ||
| className={ classnames( | ||
| 'wp-block-columns__resize-box', | ||
| 'is-selected', | ||
| { 'is-active': activeResizeClientId === column.clientId } | ||
| ) } | ||
| /> | ||
| ); | ||
| } ) } | ||
| </div> | ||
| ); | ||
| } | ||
|
|
||
| export default withDispatch( ( dispatch ) => { | ||
| const { updateBlockAttributes } = dispatch( 'core/block-editor' ); | ||
| return { updateBlockAttributes }; | ||
| } )( ColumnsResizer ); |