1、watermark.js
const watermarkId = "mask_div_collection"
function watermark(settings) {
// console.log(settings, "settings")
let fontsize = "16px"
switch (settings.watermark_fontsize) {
case "1":
fontsize = "18px"
break
case "3":
fontsize = "14px"
break
default:
fontsize = "16px"
break
}
let x_space = 100
let y_space = 50
switch (settings.watermark_density) {
case "1":
x_space = 50
y_space = 25
break
case "2":
x_space = 100
y_space = 50
break
case "3":
x_space = 160
y_space = 110
break
case "4":
x_space = 240
y_space = 160
break
case "5":
x_space = 360
y_space = 220
break
default:
x_space = 100
y_space = 50
break
}
//默认设置
var defaultSettings = {
watermark_txt: "",
watermark_x: 20, //水印起始位置x轴坐标
watermark_y: 20, //水印起始位置Y轴坐标
watermark_rows: 20, //水印行数
watermark_cols: 20, //水印列数
watermark_x_space: 100, //水印x轴间隔
watermark_y_space: 50, //水印y轴间隔
watermark_color: "
watermark_alpha: 0.2, //水印透明度
watermark_fontsize: "14px", //水印字体大小
watermark_font: "微软雅黑", //水印字体
watermark_width: 230, //水印宽度
watermark_height: 80, //水印长度
watermark_angle: 20 //水印倾斜度数
}
if (arguments.length === 1 && typeof arguments[0] === "object") {
var src = arguments[0] || {}
for (name in src) {
if (
src[name] &&
defaultSettings[name] &&
src[name] === defaultSettings[name]
)
continue
else if (src[name]) defaultSettings[name] = src[name]
}
defaultSettings["watermark_fontsize"] = fontsize
defaultSettings["watermark_x_space"] = x_space
defaultSettings["watermark_y_space"] = y_space
}
if (document.getElementById("mask_div_collection") !== null) {
document.body.removeChild(
document.getElementById("mask_div_collection")
)
}
var oTemp = document.createDocumentFragment()
//获取页面最大宽度
var page_width = Math.max(
document.body.scrollWidth,
document.body.clientWidth
)
var cutWidth = page_width * 0.015
var page_width = page_width - cutWidth
//获取页面最大高度
var page_height = Math.max(
document.body.scrollHeight,
document.body.clientHeight
)
page_height = Math.max(page_height, window.innerHeight - 30)
//如果将水印列数设置为0，或水印列数设置过大，超过页面最大宽度，则重新计算水印列数和水印x轴间隔
if (
defaultSettings.watermark_cols == 0 ||
parseInt(
defaultSettings.watermark_x +
defaultSettings.watermark_width *
defaultSettings.watermark_cols +
defaultSettings.watermark_x_space *
(defaultSettings.watermark_cols - 1)
) > page_width
) {
defaultSettings.watermark_cols = parseInt(
(page_width -
defaultSettings.watermark_x +
defaultSettings.watermark_x_space) /
(defaultSettings.watermark_width +
defaultSettings.watermark_x_space)
)
defaultSettings.watermark_x_space = parseInt(
(page_width -
defaultSettings.watermark_x -
defaultSettings.watermark_width *
defaultSettings.watermark_cols) /
(defaultSettings.watermark_cols - 1)
)
}
//如果将水印行数设置为0，或水印行数设置过大，超过页面最大长度，则重新计算水印行数和水印y轴间隔
if (
defaultSettings.watermark_rows == 0 ||
parseInt(
defaultSettings.watermark_y +
defaultSettings.watermark_height *
defaultSettings.watermark_rows +
defaultSettings.watermark_y_space *
(defaultSettings.watermark_rows - 1)
) > page_height
) {
defaultSettings.watermark_rows = parseInt(
(page_height - defaultSettings.watermark_y) /
(defaultSettings.watermark_height +
defaultSettings.watermark_y_space)
)
defaultSettings.watermark_y_space = parseInt(
(page_height -
defaultSettings.watermark_y -
defaultSettings.watermark_height *
defaultSettings.watermark_rows) /
(defaultSettings.watermark_rows - 1)
)
}
var x
var y
var collection_div = document.createElement("div")
collection_div.id = watermarkId
collection_div.style.zIndex = "99999"
collection_div.style.position = "fixed"
collection_div.style.top = 0
collection_div.style.left = 0
// console.log(defaultSettings.watermark_txt,'defaultSettings.watermark_txt')
for (var i = 0
y =
defaultSettings.watermark_y +
(defaultSettings.watermark_y_space +
defaultSettings.watermark_height) *
i
for (var j = 0
x =
defaultSettings.watermark_x +
(defaultSettings.watermark_width +
defaultSettings.watermark_x_space) *
j
var mask_div = document.createElement("div")
mask_div.id = "mask_div" + i + j
mask_div.className = "mask_div"
mask_div.appendChild(
document.createTextNode(defaultSettings.watermark_txt)
)
//设置水印div倾斜显示
mask_div.style.webkitTransform =
"rotate(-" + defaultSettings.watermark_angle + "deg)"
mask_div.style.MozTransform =
"rotate(-" + defaultSettings.watermark_angle + "deg)"
mask_div.style.msTransform =
"rotate(-" + defaultSettings.watermark_angle + "deg)"
mask_div.style.OTransform =
"rotate(-" + defaultSettings.watermark_angle + "deg)"
mask_div.style.transform =
"rotate(-" + defaultSettings.watermark_angle + "deg)"
mask_div.style.visibility = ""
mask_div.style.position = "absolute"
mask_div.style.left = x + "px"
mask_div.style.top = y + "px"
mask_div.style.overflow = "hidden"
mask_div.style.zIndex = "9999"
//让水印不遮挡页面的点击事件
mask_div.style.pointerEvents = "none"
mask_div.style.opacity = defaultSettings.watermark_alpha
mask_div.style.fontSize = defaultSettings.watermark_fontsize
mask_div.style.fontFamily = defaultSettings.watermark_font
mask_div.style.color = defaultSettings.watermark_color
mask_div.style.textAlign = "center"
mask_div.style.width = defaultSettings.watermark_width + "px"
mask_div.style.height = defaultSettings.watermark_height + "px"
mask_div.style.display = "block"
collection_div.appendChild(mask_div)
}
}
oTemp.appendChild(collection_div)
document.body.appendChild(oTemp)
}
function getNow() {
var d = new Date()
var year = d.getFullYear()
var month = change(d.getMonth() + 1)
var day = change(d.getDate())
var hour = change(d.getHours())
var minute = change(d.getMinutes())
var second = change(d.getSeconds())
function change(t) {
if (t < 10) {
return "0" + t
} else {
return t
}
}
// var time = year + '年' + month + '月' + day + '日 ' + hour + '时' + minute + '分' + second + '秒'
// var time = year + '年' + month + '月' + day + '日'
var time = year + "-" + month + "-" + day
return time
}
export { watermark, getNow, watermarkId }
2、引入watermark.js
import { watermark, getNow } from "./js/watermark.js";
3、使用、关闭
setWatermark() {
if (!pageWaterMarkSwitch) {
console.log("关闭水印");
watermark({ watermark_txt: "" });
return;
}
let watermark_txt = `${userName} ${name} ${now} ${ip} ${word}`
.split(" ")
.filter((item) => item !== "")
.join(" ");
watermark({
watermark_txt: userName + name + now + ip + word,
watermark_density: this.pageWaterMarkDensity,
watermark_fontsize: this.pageWaterMarkFont,
});
}
