useFullScreen.ts
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import { Ref, ref, unref } from 'vue';
type RFSMethodName =
| 'webkitRequestFullScreen'
| 'requestFullscreen'
| 'msRequestFullscreen'
| 'mozRequestFullScreen';
type EFSMethodName =
| 'webkitExitFullscreen'
| 'msExitFullscreen'
| 'mozCancelFullScreen'
| 'exitFullscreen';
type FSEPropName =
| 'webkitFullscreenElement'
| 'msFullscreenElement'
| 'mozFullScreenElement'
| 'fullscreenElement';
type ONFSCPropName = 'onfullscreenchange' | 'onwebkitfullscreenchange' | 'MSFullscreenChange';
export function useFullscreen(
target: Ref<Nullable<HTMLElement>> = ref(document.documentElement),
options?: FullscreenOptions
) {
const isFullscreenRef = ref(false);
const DOC_EL = document.documentElement;
let RFC_METHOD_NAME: RFSMethodName = 'requestFullscreen';
let EFS_METHOD_NAME: EFSMethodName = 'exitFullscreen';
let FSE_PROP_NAME: FSEPropName = 'fullscreenElement';
let ON_FSC_PROP_NAME: ONFSCPropName = 'onfullscreenchange';
if ('webkitRequestFullScreen' in DOC_EL) {
RFC_METHOD_NAME = 'webkitRequestFullScreen';
EFS_METHOD_NAME = 'webkitExitFullscreen';
FSE_PROP_NAME = 'webkitFullscreenElement';
ON_FSC_PROP_NAME = 'onwebkitfullscreenchange';
} else if ('msRequestFullscreen' in DOC_EL) {
RFC_METHOD_NAME = 'msRequestFullscreen';
EFS_METHOD_NAME = 'msExitFullscreen';
FSE_PROP_NAME = 'msFullscreenElement';
ON_FSC_PROP_NAME = 'MSFullscreenChange';
} else if ('mozRequestFullScreen' in DOC_EL) {
RFC_METHOD_NAME = 'mozRequestFullScreen';
EFS_METHOD_NAME = 'mozCancelFullScreen';
FSE_PROP_NAME = 'mozFullScreenElement';
// ON_FSC_PROP_NAME = 'onmozfullscreenchange';
} else if (!('requestFullscreen' in DOC_EL)) {
throw new Error('当前浏览器不支持Fullscreen API !');
}
function enterFullscreen(): Promise<void> {
isFullscreenRef.value = true;
return (target.value as any)[RFC_METHOD_NAME](options);
}
function exitFullscreen(): Promise<void> {
isFullscreenRef.value = false;
return (document as any)[EFS_METHOD_NAME]();
}
function isFullscreen(): boolean {
return unref(target) === (document as any)[FSE_PROP_NAME];
}
function toggleFullscreen(): Promise<void> {
if (isFullscreen()) {
return exitFullscreen();
} else {
return enterFullscreen();
}
}
/**
* 当全屏/退出时触发
*/
function watchFullscreen(callback: (isFull: boolean) => void) {
const cancel = () => {
const t = unref(target);
t && (t.onfullscreenchange = null);
};
const handler = () => {
callback(isFullscreen());
};
if (target.value) {
(target.value as any)[ON_FSC_PROP_NAME] = handler;
}
return {
cancel,
};
}
watchFullscreen((isFull: boolean) => {
isFullscreenRef.value = isFull;
});
return {
watchFullscreen,
toggleFullscreen,
exitFullscreen,
isFullscreen,
enterFullscreen,
isFullscreenRef,
};
}