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84
packages/block-editor/src/components/embedded-admin-context/index.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| /** | ||
| * WordPress dependencies | ||
| */ | ||
| import { useMergeRefs, useRefEffect } from '@wordpress/compose'; | ||
| import { useState, createPortal, forwardRef } from '@wordpress/element'; | ||
| import { ENTER, SPACE, ESCAPE } from '@wordpress/keycodes'; | ||
| import { focus } from '@wordpress/dom'; | ||
| import { __experimentalStyleProvider as StyleProvider } from '@wordpress/components'; | ||
|
|
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| function EmbeddedAdminContext( props, forwardedRef ) { | ||
| const [ shadow, setShadow ] = useState(); | ||
| const [ hasFocus, setHasFocus ] = useState(); | ||
| const ref = useRefEffect( ( element ) => { | ||
| const root = element.attachShadow( { mode: 'open' } ); | ||
| Array.from( document.styleSheets ).forEach( ( styleSheet ) => { | ||
| if ( styleSheet.ownerNode.getAttribute( 'data-emotion' ) ) { | ||
| return; | ||
| } | ||
|
|
||
| let child = document.createElement( 'style' ); | ||
|
|
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| // Try to avoid requests for stylesheets of which we already | ||
| // know the CSS rules. | ||
| try { | ||
| let cssText = ''; | ||
|
|
||
| for ( const cssRule of styleSheet.cssRules ) { | ||
| cssText += cssRule.cssText; | ||
| } | ||
|
|
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| child.textContent = cssText; | ||
| } catch ( e ) { | ||
| child = styleSheet.ownerNode.cloneNode( true ); | ||
| } | ||
|
|
||
| root.appendChild( child ); | ||
| } ); | ||
| setShadow( root ); | ||
|
|
||
| function onFocusIn() { | ||
| setHasFocus( true ); | ||
| } | ||
|
|
||
| function onFocusOut() { | ||
| setHasFocus( false ); | ||
| } | ||
|
|
||
| root.addEventListener( 'focusin', onFocusIn ); | ||
| root.addEventListener( 'focusout', onFocusOut ); | ||
| return () => { | ||
| root.addEventListener( 'focusin', onFocusIn ); | ||
| root.addEventListener( 'focusout', onFocusOut ); | ||
| }; | ||
| }, [] ); | ||
| return ( | ||
| <div | ||
| { ...props } | ||
| ref={ useMergeRefs( [ ref, forwardedRef ] ) } | ||
| tabIndex={ 0 } | ||
| role="button" | ||
| aria-pressed={ hasFocus } | ||
| onKeyDown={ ( event ) => { | ||
| if ( event.keyCode === ENTER || event.keyCode === SPACE ) { | ||
| focus.focusable.find( shadow )[ 0 ].focus(); | ||
| event.preventDefault(); | ||
| } else if ( event.keyCode === ESCAPE ) { | ||
| shadow.host.focus(); | ||
| event.preventDefault(); | ||
| event.stopPropagation(); | ||
| } | ||
| } } | ||
| > | ||
| { shadow && | ||
| createPortal( | ||
| <StyleProvider document={ { head: shadow } }> | ||
| { props.children } | ||
| </StyleProvider>, | ||
| shadow | ||
| ) } | ||
| </div> | ||
| ); | ||
| } | ||
|
|
||
| export default forwardRef( EmbeddedAdminContext ); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| /** | ||
| * WordPress dependencies | ||
| */ | ||
| import { useConstrainedTabbing } from '@wordpress/compose'; | ||
| import { Placeholder } from '@wordpress/components'; | ||
|
|
||
| /** | ||
| * Internal dependencies | ||
| */ | ||
| import EmbeddedAdminContext from '../embedded-admin-context'; | ||
|
|
||
| /** | ||
| * Placeholder for use in blocks. Creates an admin styling context and a tabbing | ||
| * context in the block editor's writing flow. | ||
| * | ||
| * @param {Object} props | ||
| * @param {Object} props.wrapperProps | ||
| * | ||
| * @return {WPComponent} The component | ||
| */ | ||
| export default function IsolatedPlaceholder( { wrapperProps, ...props } ) { | ||
| return ( | ||
| <EmbeddedAdminContext { ...wrapperProps }> | ||
| <Placeholder | ||
| { ...props } | ||
| role="dialog" | ||
| aria-label={ props.label } | ||
| ref={ useConstrainedTabbing() } | ||
| /> | ||
| </EmbeddedAdminContext> | ||
| ); | ||
| } |
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