"use strict";
// tslint:disable-next-line: only-arrow-functions
const setWatermark: (str: any) => any = function(str: any) {
const id: string = "1.23452384164.123412415";
if (document.getElementById(id) !== null) {
document.body.removeChild(document.getElementById(id) as any);
}
const can: any = document.createElement("canvas");
can.width = 160;
can.height = 180;
const cans: any = can.getContext("2d");
cans.rotate(-20 * Math.PI / 180);
cans.font = "16px Vedana";
cans.fillStyle = "rgba(200, 200, 200, 0.40)";
cans.textAlign = "left";
cans.textBaseline = "Middle";
cans.fillText(str, can.width / 16, can.height / 2);
const div = document.createElement("div");
div.id = id;
div.style.pointerEvents = "none";
div.style.top = "70px";
div.style.left = "240px";
div.style.position = "fixed";
div.style.zIndex = "100";
div.style.width = document.documentElement.clientWidth - 10 + "px";
div.style.height = document.documentElement.clientHeight - 100 + "px";
div.style.background = "url(" + can.toDataURL("image/png") + ") left top repeat";
document.body.appendChild(div);
return id;
};
const watermark = {
// 该方法只允许调用一次
set: (str: any) => {
let id = setWatermark(str);
setInterval(() => {
if (document.getElementById(id) === null) {
id = setWatermark(str);
}
}, 500);
window.onresize = () => {
setWatermark(str);
};
}
};
export default watermark;
