pagewatermark.js
5.58 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
if (window.location.search.indexOf("?") == 0 && window.location.search.indexOf("=") > 1
&& window.location.search.indexOf("watermark_txt") != -1) {
var markUrl = new Object();
markUrl.watermark_txt=getQueryString("watermark_txt");
watermark(markUrl);
}else{
if(typeof(mark) != "undefined"){
watermark(mark);
}
}
function getQueryString(key){
var reg = new RegExp("(^|&)"+key+"=([^&]*)(&|$)");
var result = window.location.search.substr(1).match(reg);
return result?decodeURIComponent(result[2]):null;
}
function watermark(settings) {
//默认设置
var defaultSettings={
watermark_txt:"",
watermark_x:0,//水印起始位置x轴坐标
watermark_y:40,//水印起始位置Y轴坐标
watermark_z:0,
watermark_rows:5,//水印行数
watermark_cols:10,//水印列数
watermark_x_space:0,//水印x轴最小间隔
watermark_y_space:200,//水印y轴最小间隔
watermark_x_extra:50,//水印x轴实际间隔
watermark_y_extra:50,//水印y轴实际间隔
watermark_color:'#404040',//水印字体颜色
watermark_alpha:0.1,//水印透明度
watermark_fontsize:'22px',//水印字体大小
watermark_font:'黑体',//水印字体
watermark_width:300,//水印宽度
watermark_height:100,//水印长度
watermark_angle:45//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 = window.screen.width;
//获取页面最大长度
var page_height = window.screen.height;
var x;
var y;
//预处理
var fontSize = defaultSettings.watermark_fontsize;
var watermarkWidth = fontSize.substring(0,fontSize.length-2) * defaultSettings.watermark_txt.length;
watermarkHeight = fontSize.substring(0,fontSize.length-2);
defaultSettings.watermark_width = watermarkWidth;
defaultSettings.watermark_height = watermarkHeight
defaultSettings.watermark_y_space = watermarkWidth / Math.sqrt(4);
defaultSettings.watermark_x_space = watermarkWidth / Math.sqrt(4);
defaultSettings.watermark_cols = Math.ceil(page_width/(defaultSettings.watermark_x_space+defaultSettings.watermark_x_extra));
defaultSettings.watermark_rows = Math.ceil(page_height/(defaultSettings.watermark_y_space+defaultSettings.watermark_y_extra));
for (var i = 0; i < defaultSettings.watermark_rows; i++) {
y = defaultSettings.watermark_y + (defaultSettings.watermark_y_space + defaultSettings.watermark_y_extra) * i;
for (var j = 0; j < defaultSettings.watermark_cols; j++) {
x = defaultSettings.watermark_x + (defaultSettings.watermark_x_space + defaultSettings.watermark_x_extra) * j -250;
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.filter = "progid:DXImageTransform.Microsoft.Matrix(sizingMethod='auto expand', M11=0.7071,M12=0.7071, M21=-0.7071, M22=0.7071)progid:DXImageTransform.Microsoft.Alpha(opacity="+defaultSettings.watermark_alpha * 100+")";
mask_div.style.position = "fixed";
mask_div.style.left = x + 'px';
mask_div.style.top = y + 'px';
mask_div.style.overflow = "hidden";
mask_div.style.zIndex = defaultSettings.watermark_z;
//mask_div.style.border="solid #eee 1px";
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 = defaultSettings.watermark_height + 'px';
mask_div.style.display = "block";
oTemp.appendChild(mask_div);
};
};
document.body.appendChild(oTemp);
}
function getElementsByClassName(oElm, strTagName, strClassName){
var arrElements = (strTagName == "*" && oElm.all)? oElm.all :
oElm.getElementsByTagName(strTagName);
var arrReturnElements = new Array();
strClassName = strClassName.replace(/\-/g, "\\-");
var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
var oElement;
for(var i=0; i < arrElements.length; i++){
oElement = arrElements[i];
if(oRegExp.test(oElement.className)){
arrReturnElements.push(oElement);
}
}
return (arrReturnElements)
}