lanecarford_front/src/utils/tools.ts

function getUniversalZoomLevel() {
	// 现代浏览器方案
	if (window.visualViewport) {
		return window.visualViewport.scale;
	}
	// 备用方案1
	if (window.devicePixelRatio) {
		return window.devicePixelRatio;
	}
	// 备用方案2（不精确）
	return window.outerWidth / window.innerWidth;
}
const getMousePosition = (e:any,bor:any) => {
	// if(e?.stopPropagation)e.stopPropagation()
	// if(e?.preventDefault)e.preventDefault();
	let event:any
	if(bor){
		const touch = e.changedTouches[0] as any;
		event = {
			offsetX:touch.clientX - e.target.getBoundingClientRect().left,
			offsetY: touch.clientY - e.target.getBoundingClientRect().top,
			clientX:touch.clientX,
			clientY:touch.clientY,
			screenX:touch.screenX,
			screenY:touch.screenY,
			target:e.target,
		}
		// if(dom){
		// 	event.offsetX = touch.clientX - dom.getBoundingClientRect().left
		// 	event.offsetY = touch.clientY - dom.getBoundingClientRect().top
		// }
	}else{
		event = {
			offsetX:e.offsetX,
			offsetY:e.offsetY,
			clientX:e.clientX,
			clientY:e.clientY,
			screenX:e.screenX,
			screenY:e.screenY,
			target:e.target,
		}
	}
	return event
}
export {
	getUniversalZoomLevel,
	getMousePosition,
}


/**
 * 下载图片
 * @param list 图片列表
 * @param onProgress 下载进度回调
 * @param onError 下载错误回调
 * @param onSuccess 下载成功回调
*/
export async function DownloadImages(list:Array<{url:string,name:string}>, onProgress?:(count:number,total:number,item:any)=>void, onError?:(count:number,total:number,item:any)=>void, onSuccess?:(successCount:number,errCount:number)=>void) {
	const total = list.length;
	var count = 0;
	var successCount = 0;
	var errCount = 0;
	for (let i = 0; i < list.length; i++) {
		await new Promise((resolve) => {
			let xhr = new XMLHttpRequest();
			xhr.open("GET", list[i].url);
			xhr.responseType = "blob"
			xhr.onload = function () {
				count++;
				if (this.status === 200) {
					let blob = this.response;
					const a = document.createElement('a');
					a.href = URL.createObjectURL(blob);
					a.download = list[i].name || list[i].url;
					a.click();
					successCount++;
					typeof onProgress === "function" && onProgress(count,total,list[i]);
					resolve(blob);
				} else {
					errCount++;
					typeof onError === "function" && onError(count,total,list[i]);
					resolve(true);
				}
			};
			xhr.onerror = function () {
				count++;
				errCount++;
				typeof onError === "function" && onError(count,total,list[i]);
				resolve(true);
			};
			xhr.send();
		})
	}
	typeof onSuccess === "function" && onSuccess(successCount,errCount);
}