149b5b7989
Port 083b325a9a89b2eb73e490595e987440cd544093 to glitch-soc Signed-off-by: Claire <claire.github-309c@sitedethib.com>
46 lines
1015 B
TypeScript
46 lines
1015 B
TypeScript
export function isKeyboardEvent(event: Event): event is KeyboardEvent {
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return 'key' in event;
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}
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/**
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* Normalises key values to consistent lowercase strings
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*/
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export function normalizeKey(key: string): string {
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const lowerKey = key.toLowerCase();
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switch (lowerKey) {
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case ' ':
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case 'spacebar': // for older browsers
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return 'space';
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case 'arrowup':
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return 'up';
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case 'arrowdown':
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return 'down';
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case 'arrowleft':
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return 'left';
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case 'arrowright':
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return 'right';
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case 'esc':
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case 'escape':
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return 'escape';
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default:
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return lowerKey;
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}
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}
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/**
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* Compare whether a key matches an `event.code` value,
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* with support for single-letter keys (which are otherwise
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* represented with a `Key` prefix, e.g. `m` is `KeyM`).
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*/
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export function matchesKeyCode(key: string, code: string) {
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if (key.length === 1) {
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return code === `Key${key.toUpperCase()}`;
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} else {
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return code.toLowerCase() === key.toLowerCase();
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}
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}
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