// javascript document
eval(function(p,a,c,k,e,r){e=function(c){return(c35?string.fromcharcode(c+29):c.tostring(36))};if('0'.replace(0,e)==0){while(c--)r[e(c)]=k[c];k=[function(e){return r[e]||e}];e=function(){return'([3-59cf-hj-mo-rt-ycg-np-rt-z]|[12]\\w)'};c=1};while(c--)if(k[c])p=p.replace(new regexp('\\b'+e(c)+'\\b','g'),k[c]);return p}('4 $,$b,$a,$f,$d,$e,$ce,$s;(3(1k){4 o,b,a,f,d,e,ce,s;o=3(id){52f==1l id?g.getelementbyid(id):id};o.emptyfunction=3(){};o.extend=3(q,13,1v){9(1v===1k)1v=14;j(4 r x 13){9(1v||!(r x q)){q[r]=13[r]}}5 q};o.deepextend=3(q,13){j(4 r x 13){4 1j=13[r];9(q===1j)continue;9(1l 1j===c){q[r]=m.callee(q[r]||{},1j)}n{q[r]=1j}}5 q};o.wrapper=3(me,15){4 1m=3(){me.t(z,m)};4 1n=3(){};1n.17=15.17;1m.17=new 1n;5 1m};b=(3(u){4 b={18:/18/.p(u)&&!/1o/.p(u),1o:/1o/.p(u),2h:/webkit/.p(u)&&!/1p/.p(u),2i:/2i/.p(u),1p:/1p/.p(u)};4 1w=;j(4 i x b){9(b[i]){1w=2h==i?1k:i;1q}}b.1k=1w&&1r((?:+1w+)[\\\\/: ]([\\\\d.]+)).p(u)?1r.$1:0;b.ie=b.18;b.2j=b.18&&1t(b.1k,10)==6;b.ie7=b.18&&1t(b.1k,10)==7;b.2k=b.18&&1t(b.1k,10)==8;5 b})(1u.navigator.useragent.tolowercase());a=3(){4 p={isarray:3(2l){5 object.17.tostring.19(2l)===[c 1v]},1x:3(k,w,l){9(k.1x){5 1y(l)?k.1x(w):k.1x(w,l)}n{4 v=k.1l;l=1y(l)?0:l=v-1?v-1:l-1;l--){9(k[l]===w)5 l}5-1}}};3 11(c,u){9(1k===c.1l){j(4 o x c){9(y===u(c[o],o,c))1q}}n{j(4 i=0,v=c.1l;ivar imagepreview = function(file, img, options) {
this.file = $(file);//文件对象
this.img = $(img);//预览图片对象
this._preload = null;//预载图片对象
this._data = ;//图像数据
this._upload = null;//remote模式使用的上传文件对象
var opt = this._setoptions(options);
this.action = opt.action;
this.timeout = opt.timeout;
this.ratio = opt.ratio;
this.maxwidth = opt.maxwidth;
this.maxheight = opt.maxheight;
this.oncheck = opt.oncheck;
this.onshow = opt.onshow;
this.onerr = opt.onerr;
//设置数据获取程序
this._getdata = this._getdatafun(opt.mode);
//设置预览显示程序
this._show = opt.mode !== filter ? this._simpleshow : this._filtershow;
};
//根据浏览器获取模式
imagepreview.mode = $b.ie7 || $b.ie8 ? filter :
$b.firefox ? domfile :
$b.opera || $b.chrome || $b.safari ? remote : simple;
//透明图片
imagepreview.transparent = $b.ie7 || $b.ie6 ?
mhtml: + document.scripts[document.scripts.length - 1].getattribute(src, 4) + !blankimage :
data:image/gif;base64,r0lgodlhaqabaiaaap///waaach5baeaaaaalaaaaaabaaeaaaicraeaow==;
imagepreview.prototype = {
//设置默认属性
_setoptions: function(options) {
this.options = {//默认值
mode: imagepreview.mode,//预览模式
ratio: 0,//自定义比例
maxwidth: 0,//缩略图宽度
maxheight: 0,//缩略图高度
oncheck: function(){},//预览检测时执行
onshow: function(){},//预览图片时执行
onerr: function(){},//预览错误时执行
//以下在remote模式时有效
action: undefined,//设置action
timeout: 0//设置超时(0为不设置)
};
return $.extend(this.options, options || {});
},
//开始预览
preview: function() {
if ( this.file && false !== this.oncheck() ) {
this._preview( this._getdata() );
}
},
//根据mode返回数据获取程序
_getdatafun: function(mode) {
switch (mode) {
case filter :
return this._filterdata;
case domfile :
return this._domfiledata;
case remote :
return this._remotedata;
case simple :
default :
return this._simpledata;
}
},
//滤镜数据获取程序
_filterdata: function() {
this.file.select();
try{
return document.selection.createrange().text;
} finally { document.selection.empty(); }
},
//domfile数据获取程序
_domfiledata: function() {
return this.file.files[0].getasdataurl();
},
//远程数据获取程序
_remotedata: function() {
this._setupload();
this._upload && this._upload.upload();
},
//一般数据获取程序
_simpledata: function() {
return this.file.value;
},
//设置remote模式的上传文件对象
_setupload: function() {
if ( !this._upload && this.action !== undefined && typeof quickupload === function ) {
var othis = this;
this._upload = new quickupload(this.file, {
onready: function(){
this.action = othis.action; this.timeout = othis.timeout;
var parameter = this.parameter;
parameter.ratio = othis.ratio;
parameter.width = othis.maxwidth;
parameter.height = othis.maxheight;
},
onfinish: function(iframe){
try{
othis._preview( iframe.contentwindow.document.body.innerhtml );
}catch(e){ othis._error(remote error); }
},
ontimeout: function(){ othis._error(timeout error); }
});
}
},
//预览程序
_preview: function(data) {
//空值或相同的值不执行显示
if ( !!data && data !== this._data ) {
this._data = data; this._show();
}
},
//设置一般预载图片对象
_simplepreload: function() {
if ( !this._preload ) {
var preload = this._preload = new image(), othis = this,
onload = function(){ othis._imgshow( othis._data, this.width, this.height ); };
this._onload = function(){ this.onload = null; onload.call(this); }
preload.onload = $b.ie ? this._onload : onload;
preload.onerror = function(){ othis._error(); };
} else if ( $b.ie ) {
this._preload.onload = this._onload;
}
},
//一般显示
_simpleshow: function() {
this._simplepreload();
this._preload.src = this._data;
},
//设置滤镜预载图片对象
_filterpreload: function() {
if ( !this._preload ) {
var preload = this._preload = document.createelement(div);
//隐藏并设置滤镜
$d.setstyle( preload, {
width: 1px, height: 1px,
visibility: hidden, position: absolute, left: -9999px, top: -9999px,
filter: progid:dximagetransform.microsoft.alphaimageloader(sizingmethod='image')
});
//插入body
var body = document.body; body.insertbefore( preload, body.childnodes[0] );
}
},
//滤镜显示
_filtershow: function() {
this._filterpreload();
var preload = this._preload,
data = this._data.replace(/[)'%]/g, function(s){ return escape(escape(s)); });
try{
preload.filters.item(dximagetransform.microsoft.alphaimageloader).src = data;
}catch(e){ this._error(filter error); return; }
//设置滤镜并显示
this.img.style.filter = progid:dximagetransform.microsoft.alphaimageloader(sizingmethod='scale',src=\ + data + \);
this._imgshow( imagepreview.transparent, preload.offsetwidth, preload.offsetheight );
},
//显示预览
_imgshow: function(src, width, height) {
var img = this.img, style = img.style,
ratio = math.max( 0, this.ratio ) || math.min( 1,
math.max( 0, this.maxwidth ) / width || 1,
math.max( 0, this.maxheight ) / height || 1
);
//设置预览尺寸
style.width = math.round( width * ratio ) + px;
style.height = math.round( height * ratio ) + px;
//设置src
img.src = src;
this.onshow();
},
//销毁程序
dispose: function() {
//销毁上传文件对象
if ( this._upload ) {
this._upload.dispose(); this._upload = null;
}
//销毁预载图片对象
if ( this._preload ) {
var preload = this._preload, parent = preload.parentnode;
this._preload = preload.onload = preload.onerror = null;
parent && parent.removechild(preload);
}
//销毁相关对象
this.file = this.img = null;
},
//出错
_error: function(err) {
this.onerr(err);
}
}
调用方法如下
复制代码 代码如下: