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Ensure block toolbar doesn't overlap block by modifying forcePosition…
… and shift popover props (#42887) * Flip popover placement in SelectedBlockPopover component * Adjust shift/forcePosition props instead of placement * Remount popover when attached to a different block * Remove key prop * Update hook to use an effect and handle window resize event * Fix props not changing when elements are changed. Tidy up code and add comments. * Remove any unrelated changes * Handle content ref being undefined - fixes widget editor errors * Update toolbar popover props on block movement * Use dynamic toolbar height in hook * Improve comments * Add resize observer for block * Refactor into seperate hooks * Revert "Refactor into seperate hooks" This reverts commit 59b192f. * Ensure the resize observer is using the correct view * Refactor update on block move to a different effect to reduce event binding * Fix doc block description * Add missing hook dependency * Switch to useLayoutEffect * Use lazy initial state
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packages/block-editor/src/components/block-tools/use-block-toolbar-popover-props.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,123 @@ | ||
| /** | ||
| * WordPress dependencies | ||
| */ | ||
| import { useRefEffect } from '@wordpress/compose'; | ||
| import { useSelect } from '@wordpress/data'; | ||
| import { useCallback, useLayoutEffect, useState } from '@wordpress/element'; | ||
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| /** | ||
| * Internal dependencies | ||
| */ | ||
| import { store as blockEditorStore } from '../../store'; | ||
| import { __unstableUseBlockElement as useBlockElement } from '../block-list/use-block-props/use-block-refs'; | ||
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| // By default the toolbar sets the `shift` prop. If the user scrolls the page | ||
| // down the toolbar will stay on screen by adopting a sticky position at the | ||
| // top of the viewport. | ||
| const DEFAULT_PROPS = { __unstableForcePosition: true, __unstableShift: true }; | ||
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| // When there isn't enough height between the top of the block and the editor | ||
| // canvas, the `shift` prop is set to `false`, as it will cause the block to be | ||
| // obscured. The `flip` behavior is enabled (by setting `forcePosition` to | ||
| // `false`), which positions the toolbar below the block. | ||
| const RESTRICTED_HEIGHT_PROPS = { | ||
| __unstableForcePosition: false, | ||
| __unstableShift: false, | ||
| }; | ||
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| /** | ||
| * Get the popover props for the block toolbar, determined by the space at the top of the canvas and the toolbar height. | ||
| * | ||
| * @param {Element} contentElement The DOM element that represents the editor content or canvas. | ||
| * @param {Element} selectedBlockElement The outer DOM element of the first selected block. | ||
| * @param {number} toolbarHeight The height of the toolbar in pixels. | ||
| * | ||
| * @return {Object} The popover props used to determine the position of the toolbar. | ||
| */ | ||
| function getProps( contentElement, selectedBlockElement, toolbarHeight ) { | ||
| if ( ! contentElement || ! selectedBlockElement ) { | ||
| return DEFAULT_PROPS; | ||
| } | ||
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| const blockRect = selectedBlockElement.getBoundingClientRect(); | ||
| const contentRect = contentElement.getBoundingClientRect(); | ||
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| if ( blockRect.top - contentRect.top > toolbarHeight ) { | ||
| return DEFAULT_PROPS; | ||
| } | ||
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| return RESTRICTED_HEIGHT_PROPS; | ||
| } | ||
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| /** | ||
| * Determines the desired popover positioning behavior, returning a set of appropriate props. | ||
| * | ||
| * @param {Object} elements | ||
| * @param {Element} elements.contentElement The DOM element that represents the editor content or canvas. | ||
| * @param {string} elements.clientId The clientId of the first selected block. | ||
| * | ||
| * @return {Object} The popover props used to determine the position of the toolbar. | ||
| */ | ||
| export default function useBlockToolbarPopoverProps( { | ||
| contentElement, | ||
| clientId, | ||
| } ) { | ||
| const selectedBlockElement = useBlockElement( clientId ); | ||
| const [ toolbarHeight, setToolbarHeight ] = useState( 0 ); | ||
| const [ props, setProps ] = useState( () => | ||
| getProps( contentElement, selectedBlockElement, toolbarHeight ) | ||
| ); | ||
| const blockIndex = useSelect( | ||
| ( select ) => select( blockEditorStore ).getBlockIndex( clientId ), | ||
| [ clientId ] | ||
| ); | ||
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| const popoverRef = useRefEffect( ( popoverNode ) => { | ||
| setToolbarHeight( popoverNode.offsetHeight ); | ||
| }, [] ); | ||
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| const updateProps = useCallback( | ||
| () => | ||
| setProps( | ||
| getProps( contentElement, selectedBlockElement, toolbarHeight ) | ||
| ), | ||
| [ contentElement, selectedBlockElement, toolbarHeight ] | ||
| ); | ||
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| // Update props when the block is moved. This also ensures the props are | ||
| // correct on initial mount, and when the selected block or content element | ||
| // changes (since the callback ref will update). | ||
| useLayoutEffect( updateProps, [ blockIndex, updateProps ] ); | ||
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| // Update props when the viewport is resized or the block is resized. | ||
| useLayoutEffect( () => { | ||
| if ( ! contentElement || ! selectedBlockElement ) { | ||
| return; | ||
| } | ||
|
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| // Update the toolbar props on viewport resize. | ||
| const contentView = contentElement?.ownerDocument?.defaultView; | ||
| contentView?.addEventHandler?.( 'resize', updateProps ); | ||
|
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| // Update the toolbar props on block resize. | ||
| let resizeObserver; | ||
| const blockView = selectedBlockElement?.ownerDocument?.defaultView; | ||
| if ( blockView.ResizeObserver ) { | ||
| resizeObserver = new blockView.ResizeObserver( updateProps ); | ||
| resizeObserver.observe( selectedBlockElement ); | ||
| } | ||
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| return () => { | ||
| contentView?.removeEventHandler?.( 'resize', updateProps ); | ||
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| if ( resizeObserver ) { | ||
| resizeObserver.disconnect(); | ||
| } | ||
| }; | ||
| }, [ updateProps, contentElement, selectedBlockElement ] ); | ||
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| return { | ||
| ...props, | ||
| ref: popoverRef, | ||
| }; | ||
| } |