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Fix keyboard event handling during composition #2

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Merged
muan merged 4 commits into from
Dec 20, 2018
Merged

Fix keyboard event handling during composition #2

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0e93b7a
Clear selection and return keydown event during composition
muan Dec 18, 2018
b4450a8
Add wrapping form to test default prevention
muan Dec 18, 2018
3df86d6
Support escape to clear selection and only prevent default if committed
muan Dec 18, 2018
895f19b
Use boolean instead of map because composition always ends when switc…
muan Dec 20, 2018
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Use boolean instead of map because composition always ends when switc… 
…hing inputs
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@muan
muan committed Dec 20, 2018
commit 895f19bf5a43bc937df979c5e305423b9255d27a
7 changes: 3 additions & 4 deletions combobox-nav.js
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Original file line number Diff line number Diff line change
@@ -1,7 +1,5 @@
/* @flow strict */

const compositionMap = new WeakMap()

export function install(input: HTMLTextAreaElement | HTMLInputElement, list: HTMLElement): void {
input.addEventListener('compositionstart', trackComposition)
input.addEventListener('compositionend', trackComposition)
Expand All @@ -17,13 +15,14 @@ export function uninstall(input: HTMLTextAreaElement | HTMLInputElement, list: H
list.removeEventListener('click', commitWithElement)
}

let isComposing = false
const ctrlBindings = !!navigator.userAgent.match(/Macintosh/)

function keyboardBindings(event: KeyboardEvent) {
if (event.shiftKey || event.metaKey || event.altKey) return
const input = event.currentTarget
if (!(input instanceof HTMLTextAreaElement || input instanceof HTMLInputElement)) return
if (compositionMap.get(input)) return
if (isComposing) return
const list = document.getElementById(input.getAttribute('aria-owns') || '')
if (!list) return

Expand Down Expand Up @@ -118,7 +117,7 @@ function clearSelection(list): void {
function trackComposition(event: Event): void {
const input = event.currentTarget
if (!(input instanceof HTMLTextAreaElement || input instanceof HTMLInputElement)) return
compositionMap.set(input, event.type === 'compositionstart')
isComposing = event.type === 'compositionstart'

const list = document.getElementById(input.getAttribute('aria-owns') || '')
if (!list) return
Expand Down