67 lines
2.1 KiB
JavaScript
67 lines
2.1 KiB
JavaScript
/** 水印添加方法 */
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let setWatermark = (str1, str2, str3, sourceBody) => {
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let id = "1.23452384164.123412415";
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if (document.getElementById(id) !== null) {
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document.body.removeChild(document.getElementById(id));
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}
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let can = document.createElement("canvas");
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// 设置canvas画布大小
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can.width = 200;
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can.height = 100;
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let cans = can.getContext("2d");
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cans.rotate((-35 * Math.PI) / 180); // 水印旋转角度
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cans.font = "16px Microsoft Yahei";
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cans.fillStyle = "#333333";
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cans.textAlign = "center";
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cans.textBaseline = "Middle";
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cans.fillText(str1, can.width / 3, can.height); // 水印在画布的位置x，y轴
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cans.fillText(str2, can.width / 3, can.height + 20);
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cans.fillText(str3, can.width / 3, can.height + 40);
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let div = document.createElement("div");
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div.id = id;
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div.style.pointerEvents = "none";
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div.style.opacity = "0.3";
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div.style.zIndex = "100000";
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div.style.background =
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"url(" + can.toDataURL("image/png") + ") left top repeat";
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if (sourceBody) {
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div.style.width = sourceBody.clientWidth + "px";
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div.style.height = sourceBody.clientHeight + "px";
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div.style.top = "200px";
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div.style.left = "640px";
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div.style.position = "fixed";
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sourceBody.appendChild(div);
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} else {
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div.style.top = "0px";
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div.style.left = "0px";
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div.style.position = "fixed";
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div.style.width = document.documentElement.clientWidth + "px";
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div.style.height = document.documentElement.clientHeight + "px";
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document.body.appendChild(div);
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}
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return id;
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};
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// 添加水印方法
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export const setWaterMark = (str1, str2, str3, sourceBody) => {
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let id = setWatermark(str1, str2, str3, sourceBody);
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if (document.getElementById(id) === null) {
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id = setWatermark(str1, str2, str3, sourceBody);
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}
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};
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// 移除水印方法
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export const removeWatermark = (sourceBody) => {
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let id = "1.23452384164.123412415";
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if (document.getElementById(id) !== null) {
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if (sourceBody) {
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sourceBody.removeChild(document.getElementById(id));
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} else {
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document.body.removeChild(document.getElementById(id));
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}
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}
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};
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