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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,151 @@ | ||
| /** | ||
| * @copyright Copyright (C) 2005 - 2018 Open Source Matters, Inc. All rights reserved. | ||
| * @license GNU General Public License version 2 or later; see LICENSE.txt | ||
| */ | ||
|
|
||
| (() => { | ||
| 'use strict'; | ||
|
|
||
| function topLevelMouseOver(el, settings) { | ||
| const ulChild = el.querySelector('ul'); | ||
| if (ulChild) { | ||
| ulChild.setAttribute('aria-hidden', 'false'); | ||
| ulChild.classList.add(settings.menuHoverClass); | ||
| } | ||
| } | ||
|
|
||
| function topLevelMouseOut(el, settings) { | ||
| const ulChild = el.querySelector('ul'); | ||
| if (ulChild) { | ||
| ulChild.setAttribute('aria-hidden', 'true'); | ||
| ulChild.classList.remove(settings.menuHoverClass); | ||
| } | ||
| } | ||
|
|
||
| function setupNavigation(nav) { | ||
| const settings = { | ||
| menuHoverClass: 'show-menu', | ||
| dir: 'ltr', | ||
| }; | ||
| const topLevelChilds = nav.querySelectorAll(':scope > li'); | ||
|
|
||
| // Set tabIndex to -1 so that top_level_childs can't receive focus until menu is open | ||
| topLevelChilds.forEach((topLevelEl) => { | ||
| const linkEl = topLevelEl.querySelector('a'); | ||
| if (linkEl) { | ||
| linkEl.tabIndex = '0'; | ||
| linkEl.addEventListener('mouseover', topLevelMouseOver(topLevelEl, settings)); | ||
| linkEl.addEventListener('mouseout', topLevelMouseOut(topLevelEl, settings)); | ||
| } | ||
| const spanEl = topLevelEl.querySelector('span'); | ||
| if (spanEl) { | ||
| spanEl.tabIndex = '0'; | ||
| spanEl.addEventListener('mouseover', topLevelMouseOver(topLevelEl, settings)); | ||
| spanEl.addEventListener('mouseout', topLevelMouseOut(topLevelEl, settings)); | ||
| } | ||
|
|
||
| topLevelEl.addEventListener('mouseover', (event) => { | ||
| const curEl = event.target; | ||
| const ulChild = curEl.querySelector('ul'); | ||
| if (ulChild) { | ||
| ulChild.setAttribute('aria-hidden', 'false'); | ||
| ulChild.classList.add(settings.menuHoverClass); | ||
| } | ||
| }); | ||
|
|
||
| topLevelEl.addEventListener('mouseout', (event) => { | ||
| const curEl = event.target; | ||
| const ulChild = curEl.querySelector('ul'); | ||
| if (ulChild) { | ||
| ulChild.setAttribute('aria-hidden', 'true'); | ||
| ulChild.classList.remove(settings.menuHoverClass); | ||
| } | ||
| }); | ||
|
|
||
| topLevelEl.addEventListener('focus', (event) => { | ||
| const curEl = event.target; | ||
| const ulChild = curEl.querySelector('ul'); | ||
| if (ulChild) { | ||
| ulChild.setAttribute('aria-hidden', 'true'); | ||
| ulChild.classList.add(settings.menuHoverClass); | ||
| } | ||
| }); | ||
|
|
||
| topLevelEl.addEventListener('blur', (event) => { | ||
| const curEl = event.target; | ||
| const ulChild = curEl.querySelector('ul'); | ||
| if (ulChild) { | ||
| ulChild.setAttribute('aria-hidden', 'false'); | ||
| ulChild.classList.remove(settings.menuHoverClass); | ||
| } | ||
| }); | ||
|
|
||
| topLevelEl.addEventListener('keydown', (event) => { | ||
| const keyName = event.key; | ||
| const curEl = event.target; | ||
| const curLiEl = curEl.parentElement; | ||
| const curUlEl = curLiEl.parentElement; | ||
| let prevLiEl = curLiEl.previousElementSibling; | ||
| let nextLiEl = curLiEl.nextElementSibling; | ||
| if (!prevLiEl) { | ||
| prevLiEl = curUlEl.children[curUlEl.children.length - 1]; | ||
| } | ||
| if (!nextLiEl) { | ||
| [nextLiEl] = curUlEl.children; | ||
| } | ||
| switch (keyName) { | ||
| case 'ArrowLeft': | ||
| event.preventDefault(); | ||
| if (settings.dir === 'rtl') { | ||
| nextLiEl.children[0].focus(); | ||
| } else { | ||
| prevLiEl.children[0].focus(); | ||
| } | ||
| break; | ||
| case 'ArrowRight': | ||
| event.preventDefault(); | ||
| if (settings.dir === 'rtl') { | ||
| prevLiEl.children[0].focus(); | ||
| } else { | ||
| nextLiEl.children[0].focus(); | ||
| } | ||
| break; | ||
| case 'ArrowUp': | ||
| { | ||
| event.preventDefault(); | ||
| const parent = curLiEl.parentElement.parentElement; | ||
| if (parent.nodeName === 'LI') { | ||
| parent.children[0].focus(); | ||
| } else { | ||
| prevLiEl.children[0].focus(); | ||
| } | ||
| break; | ||
| } | ||
| case 'ArrowDown': | ||
| event.preventDefault(); | ||
| if (curLiEl.classList.contains('parent')) { | ||
| const child = curLiEl.querySelector('ul'); | ||
| if (child != null) { | ||
| const childLi = child.querySelector('li'); | ||
| childLi.children[0].focus(); | ||
| } else { | ||
| nextLiEl.children[0].focus(); | ||
| } | ||
| } else { | ||
| nextLiEl.children[0].focus(); | ||
| } | ||
| break; | ||
| default: | ||
| break; | ||
| } | ||
| }); | ||
| }); | ||
| } | ||
|
|
||
| document.addEventListener('DOMContentLoaded', () => { | ||
| const navs = document.querySelectorAll('.nav'); | ||
| [].forEach.call(navs, (nav) => { | ||
| setupNavigation(nav); | ||
| }); | ||
| }); | ||
| })(); |
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