feat(a11y): added support in the CloudImageEditor #671
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| // @ts-check | ||
| import { startKeyUX, hiddenKeyUX, jumpKeyUX, focusGroupKeyUX, pressKeyUX } from 'keyux'; | ||
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| /** | ||
| * MinimalWindow interface is not exported by keyux, so we import it here using tricky way. | ||
| * | ||
| * @typedef {Parameters<import('keyux').KeyUXModule>[0]} MinimalWindow | ||
| */ | ||
|
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| /** | ||
| * This is global window wrapper that allows to scope event listeners to a specific part of the DOM. | ||
| * | ||
| * It is used to scope the key UX to the widget. | ||
| * | ||
| * @implements {MinimalWindow} | ||
| */ | ||
| class ScopedMinimalWindow { | ||
| /** | ||
| * @private | ||
| * @type {Map<Function, (event: Event) => void>} | ||
| */ | ||
| _listeners = new Map(); | ||
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|
||
| /** | ||
| * @private | ||
| * @type {Node[]} | ||
| */ | ||
| _scope = []; | ||
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| /** | ||
| * @param {'keydown' | 'keyup'} type | ||
| * @param {(event: Event) => void} listener | ||
| */ | ||
| addEventListener(type, listener) { | ||
| /** @param {Event} e */ | ||
| const wrappedListener = (e) => { | ||
| const target = e.target; | ||
| if (!target) return; | ||
| if (this._scope.some((el) => el === e.target || el.contains(/** @type {Node} */ (target)))) { | ||
| listener(e); | ||
| } | ||
| }; | ||
| this._listeners.set(listener, wrappedListener); | ||
| window.addEventListener(type, wrappedListener); | ||
| } | ||
|
|
||
| /** | ||
| * @param {'keydown' | 'keyup'} type | ||
| * @param {(event: {}) => void} listener | ||
| */ | ||
| removeEventListener(type, listener) { | ||
| const wrappedListener = this._listeners.get(listener); | ||
| if (wrappedListener) { | ||
| window.removeEventListener(type, wrappedListener); | ||
| } | ||
| this._listeners.delete(listener); | ||
| } | ||
|
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||
| get CustomEvent() { | ||
| return window.CustomEvent; | ||
| } | ||
|
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| get document() { | ||
| return window.document; | ||
| } | ||
|
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| get navigator() { | ||
| return window.navigator; | ||
| } | ||
|
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||
| /** @param {Node} scope */ | ||
| registerScope(scope) { | ||
| this._scope.push(scope); | ||
| } | ||
|
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| destroy() { | ||
| this._scope = []; | ||
| this._listeners.forEach((listener, originalListener) => { | ||
| window.removeEventListener('keydown', listener); | ||
| window.removeEventListener('keyup', listener); | ||
| this._listeners.delete(originalListener); | ||
| }); | ||
| } | ||
| } | ||
|
|
||
| export class A11y { | ||
| /** | ||
| * @private | ||
| * @type {(() => void) | undefined} | ||
| */ | ||
| _destroyKeyUX; | ||
|
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||
| /** | ||
| * @private | ||
| * @type {ScopedMinimalWindow} | ||
| */ | ||
| _scopedWindow; | ||
|
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||
| constructor() { | ||
| this._scopedWindow = new ScopedMinimalWindow(); | ||
| this._destroyKeyUX = startKeyUX(this._scopedWindow, [ | ||
| focusGroupKeyUX(), | ||
| pressKeyUX('is-pressed'), | ||
| jumpKeyUX(), | ||
| hiddenKeyUX(), | ||
| ]); | ||
| } | ||
|
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||
| /** @param {import('./Block.js').Block} scope */ | ||
| registerBlock(scope) { | ||
| this._scopedWindow.registerScope(scope); | ||
| } | ||
|
|
||
| destroy() { | ||
| this._destroyKeyUX?.(); | ||
| this._scopedWindow.destroy(); | ||
| } | ||
| } |
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Static method context issue needs resolution.
The static methods
set templateandget templateincorrectly usethisto refer to instance properties, which is not valid in a static context. This could lead to runtime errors.Also applies to: 21-21
Tools
Biome