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https://github.com/haiwen/seahub.git
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251 lines
12 KiB
JavaScript
251 lines
12 KiB
JavaScript
(function(watermark){
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window.watermarkdivs = [];
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// 加载水印
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var loadMark = function(settings) {
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var defaultSettings={
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watermark_id: 'wm_div_id', //水印总体的id
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watermark_txt:"测试水印", //水印的内容
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watermark_x:20, //水印起始位置x轴坐标
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watermark_y:20, //水印起始位置Y轴坐标
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watermark_rows:0, //水印行数
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watermark_cols:0, //水印列数
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watermark_x_space:100, //水印x轴间隔
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watermark_y_space:50, //水印y轴间隔
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watermark_font:'微软雅黑', //水印字体
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watermark_color:'black', //水印字体颜色
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watermark_fontsize:'18px', //水印字体大小
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watermark_alpha:0.15, //水印透明度，要求设置在大于等于0.003
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watermark_width:150, //水印宽度
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watermark_height:100, //水印长度
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watermark_angle:15 //水印倾斜度数
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};
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//采用配置项替换默认值，作用类似jquery.extend
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if(arguments.length === 1&&typeof arguments[0] ==="object" )
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{
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var src = arguments[0]||{};
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for(key in src)
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{
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if(src[key]&&defaultSettings[key]&&src[key]===defaultSettings[key])
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continue;
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else if(src[key])
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defaultSettings[key]=src[key];
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}
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}
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//如果元素存在就移除
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var watermark_element = document.getElementById(defaultSettings.watermark_id);
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if(watermark_element){
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var _parentElement = watermark_element.parentNode;
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if(_parentElement){
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_parentElement.removeChild(watermark_element);
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}
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}
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//获取页面最大宽度
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var page_width = Math.max(document.body.scrollWidth,document.body.clientWidth)-30;
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//获取页面最大长度
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var page_height = Math.max(document.body.scrollHeight,document.body.clientHeight)-30;
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// 是否支持ShadowRoot
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var IsShadowRoot = typeof document.createShadowRoot === 'function';
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//var IsIE78=/msie [6|7|8]/i.test(window.navigator.userAgent);
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//var cosv=0;
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//var sinv=0;
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//var M12=0;
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//if(IsIE78){
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// var fv=360-defaultSettings.watermark_angle%360;
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// cosv=Math.cos(fv);
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// sinv=Math.sin(fv);
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// M12=-sinv;
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//}
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//创建水印外壳div
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var otdiv = document.getElementById(defaultSettings.watermark_id);
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if(!otdiv){
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otdiv = document.createElement('div');
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//创建shadow dom
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otdiv.id = defaultSettings.watermark_id;
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otdiv.style.pointerEvents = "none";
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//判断浏览器是否支持createShadowRoot方法
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if(typeof otdiv.createShadowRoot === 'function'){
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shadowRoot = otdiv.createShadowRoot();
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}else{
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shadowRoot = otdiv;
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}
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//将shadow dom随机插入到body内的任意位置
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var nodeList = document.body.children;
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var index = Math.floor(Math.random()*(nodeList.length-1));
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if(nodeList[index]){
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document.body.insertBefore(otdiv,nodeList[index]);
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}else{
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document.body.appendChild(otdiv);
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}
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}else if(otdiv,shadowRoot){
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shadowRoot = otdiv.shadowRoot;
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}
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//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
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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)) {
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defaultSettings.watermark_cols = parseInt((page_width - defaultSettings.watermark_x + defaultSettings.watermark_x_space) / (defaultSettings.watermark_width + defaultSettings.watermark_x_space));
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defaultSettings.watermark_x_space = parseInt((page_width - defaultSettings.watermark_x - defaultSettings.watermark_width * defaultSettings.watermark_cols) / (defaultSettings.watermark_cols - 1));
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}
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//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
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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)) {
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defaultSettings.watermark_rows = parseInt((defaultSettings.watermark_y_space + page_height - defaultSettings.watermark_y) / (defaultSettings.watermark_height + defaultSettings.watermark_y_space));
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defaultSettings.watermark_y_space = parseInt(((page_height - defaultSettings.watermark_y) - defaultSettings.watermark_height * defaultSettings.watermark_rows) / (defaultSettings.watermark_rows - 1));
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}
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var x;
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var y;
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for (var i = 0; i < defaultSettings.watermark_rows; i++) {
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y = defaultSettings.watermark_y + (defaultSettings.watermark_y_space + defaultSettings.watermark_height) * i;
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for (var j = 0; j < defaultSettings.watermark_cols; j++) {
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x = defaultSettings.watermark_x + (defaultSettings.watermark_width + defaultSettings.watermark_x_space) * j;
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var mask_div = document.createElement('div');
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mask_div.innerHTML = defaultSettings.watermark_txt;
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// 设置水印相关属性start
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mask_div.id = defaultSettings.watermark_id + i + j;
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//设置水印div倾斜显示
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mask_div.style.webkitTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
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mask_div.style.MozTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
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mask_div.style.msTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
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mask_div.style.OTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
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mask_div.style.transform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
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mask_div.style.visibility = "";
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mask_div.style.position = "absolute";
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//选不中
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mask_div.style.left = x + 'px';
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mask_div.style.top = y + 'px';
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mask_div.style.overflow = "hidden";
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mask_div.style.zIndex = "9999";
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mask_div.style.opacity = defaultSettings.watermark_alpha;
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mask_div.style.filter="progid:DXImageTransform.Microsoft.Alpha(Opacity="+(defaultSettings.watermark_alpha*100)+")";
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//if(IsIE78) //ie7 8
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// mask_div.style.filter="progid:DXImageTransform.Microsoft.Matrix(M11="+cosv+",M12="+M12+",M21="+sinv+",M22="+cosv+",SizingMethod='auto expand')progid:DXImageTransform.Microsoft.Alpha(Opacity="+(defaultSettings.watermark_alpha*100)+")";
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mask_div.style.fontSize = defaultSettings.watermark_fontsize;
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mask_div.style.fontFamily = defaultSettings.watermark_font;
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mask_div.style.color = defaultSettings.watermark_color;
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mask_div.style.textAlign = "center";
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mask_div.style.width = defaultSettings.watermark_width + 'px';
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mask_div.style.height = defaultSettings.watermark_height + 'px';
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mask_div.style.display = "block";
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if(!IsShadowRoot)
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{
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mask_div.onclick= function(){
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var vcliEle = getElementsByClientXY(document, event.clientX, event.clientY, 0, 0);
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if (vcliEle != null) {
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switch (vcliEle.nodeName) {
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case "A":
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vcliEle.click();
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break;
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case "SELECT":
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//找不到方法打开下拉框
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vcliEle.focus();
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break;
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case "TEXTAREA":
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vcliEle.focus();
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break;
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case "INPUT":
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var vtype = vcliEle.getAttribute("type").toLowerCase();
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switch (vtype) {
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case "radio":
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case "checkbox":
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case "button":
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case "submit":
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case "reset":
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case "file":
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vcliEle.click();
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break;
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default:
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vcliEle.focus();
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break;
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}
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break;
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}
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}
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};
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}
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//设置水印相关属性end
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//附加到文档碎片中
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shadowRoot.appendChild(mask_div);
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};
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};
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};
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var getXYTagByTagName = function (tagname, doc, clientX, clientY, fleft, ftop) {
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//本级的控件
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var inputs = doc.getElementsByTagName(tagname);
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for (var i = 0, j = inputs.length; i < j; i++) {
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var vrect = inputs[i].getBoundingClientRect();
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var xmin = vrect.left + fleft;
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var ymin = vrect.top + ftop;
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var vwidth = vrect.width || inputs[i].offsetWidth;
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var vheight = vrect.height || inputs[i].clientHeight;
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var xmax = xmin + vwidth;
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var ymax = ymin + vheight;
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if (xmin <= clientX && xmax >= clientX && ymin <= clientY && ymax >= clientY) {
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return inputs[i];
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}
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}
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return null;
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}
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var getElementsByClientXY = function (doc, clientX, clientY, fleft, ftop) {
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//本级的控件
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var vtag = getXYTagByTagName("input",doc, clientX, clientY, fleft, ftop);
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if(vtag!=null)
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return vtag;
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vtag = getXYTagByTagName("textarea",doc, clientX, clientY, fleft, ftop);
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if(vtag!=null)
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return vtag;
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vtag = getXYTagByTagName("select",doc, clientX, clientY, fleft, ftop);
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if(vtag!=null)
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return vtag;
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vtag = getXYTagByTagName("a",doc, clientX, clientY, fleft, ftop);
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if(vtag!=null)
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return vtag;
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//检查是否有iframe
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var viframe = doc.getElementsByTagName("iframe");
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for (var k = 0, m = viframe.length; k < m; k++) {
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var vfrect = viframe[k].getBoundingClientRect();
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vfleft = fleft + vfrect.left;
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vftop = ftop + vfrect.top;
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var vframedoc = viframe[k].contentDocument || viframe[k].contentWindow.document;
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var ifrele = getElementsByClientXY(vframedoc, clientX, clientY, vfleft, vftop);
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if (ifrele != null)
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return ifrele;
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}
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return null;
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}
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//初始化水印，添加load和resize事件
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watermark.init = function (settings) {
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try {
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window.addEventListener('load', function () {
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loadMark(settings);
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});
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window.addEventListener('resize', function () {
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loadMark(settings);
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});
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window.addEventListener('DOMContentLoaded', function () {
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loadMark(settings);
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})
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}
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catch (ex)
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{
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loadMark(settings);
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}
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};
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//手动加载水印
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watermark.load = function (settings) {
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loadMark(settings);
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};
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})(window.watermark = {});
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