|
1 | | -import React from 'react' |
| 1 | +import React, { useEffect } from 'react' |
2 | 2 | import { SnippetForm } from './SnippetForm' |
3 | 3 |
|
4 | | -export const EditMenu = () => |
5 | | - <SnippetForm /> |
| 4 | +const EVENT_NAME = 'code_snippets_focus_editor' |
| 5 | + |
| 6 | +interface EditMenuLinkBinding { |
| 7 | + menuLink: HTMLAnchorElement |
| 8 | + originalHref: string | undefined |
| 9 | + originalRole: string | undefined |
| 10 | + originalTabIndex: string | undefined |
| 11 | + handleClick: (event: MouseEvent) => void |
| 12 | + handleKeyDown: (event: KeyboardEvent) => void |
| 13 | +} |
| 14 | + |
| 15 | +const focusCodeEditor = () => { |
| 16 | + window.dispatchEvent(new CustomEvent(EVENT_NAME)) |
| 17 | +} |
| 18 | + |
| 19 | +const restoreAttribute = (menuLink: HTMLAnchorElement, name: string, value: string | undefined) => { |
| 20 | + if (undefined !== value) { |
| 21 | + menuLink.setAttribute(name, value) |
| 22 | + return |
| 23 | + } |
| 24 | + |
| 25 | + menuLink.removeAttribute(name) |
| 26 | +} |
| 27 | + |
| 28 | +const getEditPage = (): string | undefined => { |
| 29 | + const editUrl = window.CODE_SNIPPETS?.urls.edit |
| 30 | + |
| 31 | + return editUrl ? new URL(editUrl, window.location.origin).searchParams.get('page') ?? undefined : undefined |
| 32 | +} |
| 33 | + |
| 34 | +const bindEditMenuLink = (menuLink: HTMLAnchorElement, page: string): EditMenuLinkBinding | undefined => { |
| 35 | + const menuUrl = new URL(menuLink.href, window.location.origin) |
| 36 | + |
| 37 | + if (page !== menuUrl.searchParams.get('page')) { |
| 38 | + return undefined |
| 39 | + } |
| 40 | + |
| 41 | + const handleClick = (event: MouseEvent) => { |
| 42 | + event.preventDefault() |
| 43 | + focusCodeEditor() |
| 44 | + } |
| 45 | + |
| 46 | + const handleKeyDown = (event: KeyboardEvent) => { |
| 47 | + if ('Enter' !== event.key && ' ' !== event.key) { |
| 48 | + return |
| 49 | + } |
| 50 | + |
| 51 | + event.preventDefault() |
| 52 | + focusCodeEditor() |
| 53 | + } |
| 54 | + |
| 55 | + const binding = { |
| 56 | + menuLink, |
| 57 | + originalHref: menuLink.getAttribute('href') ?? undefined, |
| 58 | + originalRole: menuLink.getAttribute('role') ?? undefined, |
| 59 | + originalTabIndex: menuLink.getAttribute('tabindex') ?? undefined, |
| 60 | + handleClick, |
| 61 | + handleKeyDown |
| 62 | + } |
| 63 | + |
| 64 | + menuLink.dataset.codeSnippetsDisabled = 'true' |
| 65 | + menuLink.setAttribute('role', 'button') |
| 66 | + menuLink.setAttribute('tabindex', '0') |
| 67 | + menuLink.classList.add('code-snippets-edit-menu-link') |
| 68 | + menuLink.removeAttribute('href') |
| 69 | + menuLink.addEventListener('click', handleClick) |
| 70 | + menuLink.addEventListener('keydown', handleKeyDown) |
| 71 | + |
| 72 | + return binding |
| 73 | +} |
| 74 | + |
| 75 | +const unbindEditMenuLink = ({ |
| 76 | + menuLink, |
| 77 | + originalHref, |
| 78 | + originalRole, |
| 79 | + originalTabIndex, |
| 80 | + handleClick, |
| 81 | + handleKeyDown |
| 82 | +}: EditMenuLinkBinding) => { |
| 83 | + menuLink.removeEventListener('click', handleClick) |
| 84 | + menuLink.removeEventListener('keydown', handleKeyDown) |
| 85 | + menuLink.classList.remove('code-snippets-edit-menu-link') |
| 86 | + delete menuLink.dataset.codeSnippetsDisabled |
| 87 | + |
| 88 | + restoreAttribute(menuLink, 'href', originalHref) |
| 89 | + restoreAttribute(menuLink, 'role', originalRole) |
| 90 | + restoreAttribute(menuLink, 'tabindex', originalTabIndex) |
| 91 | +} |
| 92 | + |
| 93 | +const useEditMenuLinkFocus = () => { |
| 94 | + useEffect(() => { |
| 95 | + const page = getEditPage() |
| 96 | + |
| 97 | + if (!page) { |
| 98 | + return |
| 99 | + } |
| 100 | + |
| 101 | + const editMenuLinks = Array.from(document.querySelectorAll<HTMLAnchorElement>('#adminmenu a[href]')) |
| 102 | + .flatMap(menuLink => { |
| 103 | + const binding = bindEditMenuLink(menuLink, page) |
| 104 | + |
| 105 | + return binding ? [binding] : [] |
| 106 | + }) |
| 107 | + |
| 108 | + return () => { |
| 109 | + editMenuLinks.forEach(unbindEditMenuLink) |
| 110 | + } |
| 111 | + }, []) |
| 112 | +} |
| 113 | + |
| 114 | +export const EditMenu = () => { |
| 115 | + useEditMenuLinkFocus() |
| 116 | + |
| 117 | + return <SnippetForm /> |
| 118 | +} |
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