js vue 页面添加水印

2024-10-04 06:03:43

vue 微信页面添加水印

this.$nextTick(function() {
watermark({ watermark_txt: "<div>" + '123' + "</div><div>" + '456' + "</div>"});
})

function watermark(settings) {
      //默认设置
      var defaultSettings={
        watermark_txt:"text",
        watermark_x:70,//水印起始位置x轴坐标
        watermark_y:10,//水印起始位置Y轴坐标
        watermark_rows:100,//水印行数
        watermark_cols:2,//水印列数
        watermark_x_space:60,//水印x轴间隔
        watermark_y_space:40,//水印y轴间隔
        watermark_color:'#aaa',//水印字体颜色
        watermark_alpha:0.3,//水印透明度
        watermark_fontsize:'.26rem',//水印字体大小
        watermark_width:60,//水印宽度
        watermark_height:60,//水印高度
        watermark_angle:10//水印倾斜度数
      };
      //采用配置项替换默认值，作用类似jquery.extend
      if(arguments.length===1&&typeof arguments[0] ==="object" )
      {
        var src=arguments[0]||{};
        for(key in src)
        {
          if(src[key]&&defaultSettings[key]&&src[key]===defaultSettings[key])
            continue;
          else if(src[key])
            defaultSettings[key]=src[key];
        }
      }

      var oTemp = document.createDocumentFragment();

      //获取页面最大宽度
      var page_width = Math.max(document.body.scrollWidth,document.body.clientWidth) - 30;
      //获取页面最大高度
//        var page_height = Math.max(document.body.scrollHeight,document.body.clientHeight);
      var page_height = Math.max($("#iContainer").get(0).clientHeight,document.body.clientHeight,$("#iContainer").get(0).scrollHeight) - 20;
//        var page_height = $("#iContainer").get(0).scrollHeight;
   // console.log(page_height,$("#iContainer").outerHeight());


      //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((defaultSettings.watermark_y_space + 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;
      for (var i = 0; i < defaultSettings.watermark_rows; i++) {
        y = defaultSettings.watermark_y + (defaultSettings.watermark_y_space + defaultSettings.watermark_height) * i;
        for (var j = 0; j < defaultSettings.watermark_cols; j++) {
          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.innerHTML = 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 = "9999999";
          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.lineHeight = '.32rem';
          mask_div.style.display = "inline-block";
          oTemp.appendChild(mask_div);
        };
      };
      console.log($('.mask_div:odd'));
      document.body.appendChild(oTemp);
      $('.mask_div:odd').css({left:defaultSettings.watermark_x + 'px'});
      $('.mask_div:even').css({right:defaultSettings.watermark_x + 'px'});
}

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