32 lines
916 B
TypeScript
32 lines
916 B
TypeScript
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// Copyright 2021 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import { strictAssert } from '../util/assert';
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type LayoutMapType = { get(code: string): string | undefined };
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let layoutMap: LayoutMapType | undefined;
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export async function initialize(): Promise<void> {
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strictAssert(layoutMap === undefined, 'keyboardLayout already initialized');
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const experimentalNavigator = (window.navigator as unknown) as {
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keyboard: { getLayoutMap(): Promise<LayoutMapType> };
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};
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strictAssert(
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typeof experimentalNavigator.keyboard?.getLayoutMap === 'function',
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'No support for getLayoutMap'
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);
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layoutMap = await experimentalNavigator.keyboard.getLayoutMap();
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}
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export function lookup({
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code,
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key,
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}: Pick<KeyboardEvent, 'code' | 'key'>): string | undefined {
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strictAssert(layoutMap !== undefined, 'keyboardLayout not initialized');
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return layoutMap.get(code) ?? key;
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}
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