decla-red/frontend/src/scripts/handle-full-screen.ts
2020-11-02 11:12:03 +01:00

52 lines
1.3 KiB
TypeScript

import { SoundHandler, Sounds } from './sound-handler';
export const handleFullScreen = (
minimizeButton: HTMLElement,
maximizeButton: HTMLElement,
) => {
if (!document.fullscreenEnabled) {
minimizeButton.style.visibility = 'hidden';
maximizeButton.style.visibility = 'hidden';
return;
}
const isInFullScreen = (): boolean => document.fullscreenElement !== null;
const showButtons = () => {
minimizeButton.style.visibility = isInFullScreen() ? 'visible' : 'hidden';
maximizeButton.style.visibility = isInFullScreen() ? 'hidden' : 'visible';
};
showButtons();
let currentWindowHeight = innerHeight;
const followToggle = () => {
SoundHandler.play(Sounds.click);
showButtons();
currentWindowHeight = innerHeight;
};
const triggerToggle = async () => {
await (isInFullScreen()
? document.exitFullscreen()
: document.body.requestFullscreen());
followToggle();
};
addEventListener('keydown', (e) => {
if (e.key === 'F11') {
triggerToggle();
e.preventDefault();
}
});
addEventListener('resize', () => {
if (isInFullScreen && currentWindowHeight > innerHeight) {
followToggle();
}
});
maximizeButton.addEventListener('click', triggerToggle);
minimizeButton.addEventListener('click', triggerToggle);
};