55 lines
1.2 KiB
TypeScript
55 lines
1.2 KiB
TypeScript
import { useEffect } from '../../lib/teact/teact';
|
|
|
|
import { createCallbackManager } from '../../util/callbacks';
|
|
import useLastCallback from '../useLastCallback';
|
|
|
|
const blurCallbacks = createCallbackManager();
|
|
const focusCallbacks = createCallbackManager();
|
|
|
|
let isFocused = document.hasFocus();
|
|
|
|
window.addEventListener('blur', () => {
|
|
if (!isFocused) {
|
|
return;
|
|
}
|
|
|
|
isFocused = false;
|
|
blurCallbacks.runCallbacks();
|
|
});
|
|
|
|
window.addEventListener('focus', () => {
|
|
isFocused = true;
|
|
focusCallbacks.runCallbacks();
|
|
});
|
|
|
|
export default function useBackgroundMode(
|
|
onBlur?: AnyToVoidFunction,
|
|
onFocus?: AnyToVoidFunction,
|
|
isDisabled = false,
|
|
) {
|
|
const lastOnBlur = useLastCallback(onBlur);
|
|
const lastOnFocus = useLastCallback(onFocus);
|
|
|
|
useEffect(() => {
|
|
if (isDisabled) {
|
|
return undefined;
|
|
}
|
|
|
|
if (!isFocused) {
|
|
lastOnBlur();
|
|
}
|
|
|
|
blurCallbacks.addCallback(lastOnBlur);
|
|
focusCallbacks.addCallback(lastOnFocus);
|
|
|
|
return () => {
|
|
focusCallbacks.removeCallback(lastOnFocus);
|
|
blurCallbacks.removeCallback(lastOnBlur);
|
|
};
|
|
}, [isDisabled, lastOnBlur, lastOnFocus]);
|
|
}
|
|
|
|
export function isBackgroundModeActive() {
|
|
return !isFocused;
|
|
}
|