cropper.js

在线裁切图片

if(_22){
this.applyRatio(_20,{x:1,y:1},_23,_24);
}
}
var _27=[this.options.minWidth,this.options.minHeight];
var _28=[this.options.maxWidth,this.options.maxHeight];
if(_27[0]>0||_27[1]>0||_28[0]>0||_28[1]>0){
var _29={a1:_20.x1,a2:_20.x2};
var _2a={a1:_20.y1,a2:_20.y2};
var _2b={min:0,max:this.imgW};
var _2c={min:0,max:this.imgH};
if((_27[0]!=0||_27[1]!=0)&&_22){
if(_27[0]>0){
_27[1]=_27[0];
}else{
if(_27[1]>0){
_27[0]=_27[1];
}
}
}
if((_28[0]!=0||_28[0]!=0)&&_22){
if(_28[0]>0&&_28[0]<=_28[1]){
_28[1]=_28[0];
}else{
if(_28[1]>0&&_28[1]<=_28[0]){
_28[0]=_28[1];
}
}
}
if(_27[0]>0){
this.applyDimRestriction(_29,_27[0],_23.x,_2b,"min");
}
if(_27[1]>1){
this.applyDimRestriction(_2a,_27[1],_23.y,_2c,"min");
}
if(_28[0]>0){
this.applyDimRestriction(_29,_28[0],_23.x,_2b,"max");
}
if(_28[1]>1){
this.applyDimRestriction(_2a,_28[1],_23.y,_2c,"max");
}
_20={x1:_29.a1,y1:_2a.a1,x2:_29.a2,y2:_2a.a2};
}
}
}
this.areaCoords=_20;
},applyDimRestriction:function(_2d,val,_2f,_30,_31){
var _32;
if(_31=="min"){
_32=((_2d.a2-_2d.a1)<val);
}else{
_32=((_2d.a2-_2d.a1)>val);
}
if(_32){
if(_2f==1){
_2d.a2=_2d.a1+val;
}else{
_2d.a1=_2d.a2-val;
}
if(_2d.a1<_30.min){
_2d.a1=_30.min;
_2d.a2=val;
}else{
if(_2d.a2>_30.max){
_2d.a1=_30.max-val;
_2d.a2=_30.max;
}
}
}
},applyRatio:function(_33,_34,_35,_36){
var _37;
if(_36=="N"||_36=="S"){
_37=this.applyRatioToAxis({a1:_33.y1,b1:_33.x1,a2:_33.y2,b2:_33.x2},{a:_34.y,b:_34.x},{a:_35.y,b:_35.x},{min:0,max:this.imgW});
_33.x1=_37.b1;
_33.y1=_37.a1;
_33.x2=_37.b2;
_33.y2=_37.a2;
}else{
_37=this.applyRatioToAxis({a1:_33.x1,b1:_33.y1,a2:_33.x2,b2:_33.y2},{a:_34.x,b:_34.y},{a:_35.x,b:_35.y},{min:0,max:this.imgH});
_33.x1=_37.a1;
_33.y1=_37.b1;
_33.x2=_37.a2;
_33.y2=_37.b2;
}
},applyRatioToAxis:function(_38,_39,_3a,_3b){
var _3c=Object.extend(_38,{});
var _3d=_3c.a2-_3c.a1;
var _3e=Math.floor(_3d*_39.b/_39.a);
var _3f;
var _40;
var _41=null;
if(_3a.b==1){
_3f=_3c.b1+_3e;
if(_3f>_3b.max){
_3f=_3b.max;
_41=_3f-_3c.b1;
}
_3c.b2=_3f;
}else{
_3f=_3c.b2-_3e;
if(_3f<_3b.min){
_3f=_3b.min;
_41=_3f+_3c.b2;
}
_3c.b1=_3f;
}
if(_41!=null){
_40=Math.floor(_41*_39.a/_39.b);
if(_3a.a==1){
_3c.a2=_3c.a1+_40;
}else{
_3c.a1=_3c.a1=_3c.a2-_40;
}
}
return _3c;
},drawArea:function(){
var _42=this.calcW();
var _43=this.calcH();
var px="px";
var _45=[this.areaCoords.x1+px,this.areaCoords.y1+px,_42+px,_43+px,this.areaCoords.x2+px,this.areaCoords.y2+px,(this.img.width-this.areaCoords.x2)+px,(this.img.height-this.areaCoords.y2)+px];
var _46=this.selArea.style;
_46.left=_45[0];
_46.top=_45[1];
_46.width=_45[2];
_46.height=_45[3];
var _47=Math.ceil((_42-6)/2)+px;
var _48=Math.ceil((_43-6)/2)+px;
this.handleN.style.left=_47;
this.handleE.style.top=_48;
this.handleS.style.left=_47;
this.handleW.style.top=_48;
this.north.style.height=_45[1];
var _49=this.east.style;
_49.top=_45[1];
_49.height=_45[3];
_49.left=_45[4];
_49.width=_45[6];
var _4a=this.south.style;
_4a.top=_45[5];
_4a.height=_45[7];
var _4b=this.west.style;
_4b.top=_45[1];
_4b.height=_45[3];
_4b.width=_45[0];
this.subDrawArea();
this.forceReRender();
},forceReRender:function(){
if(this.isIE||this.isWebKit){
var n=document.createTextNode(" ");
var d,el,fixEL,i;
if(this.isIE){
fixEl=this.selArea;
}else{
if(this.isWebKit){
fixEl=document.getElementsByClassName("imgCrop_marqueeSouth",this.imgWrap)[0];
d=Builder.node("div","");
d.style.visibility="hidden";
var _4e=["SE","S","SW"];
for(i=0;i<_4e.length;i++){
el=document.getElementsByClassName("imgCrop_handle"+_4e[i],this.selArea)[0];
if(el.childNodes.length){
el.removeChild(el.childNodes[0]);
}
el.appendChild(d);
}
}
}
fixEl.appendChild(n);
fixEl.removeChild(n);
}
},startResize:function(e){
this.startCoords=this.cloneCoords(this.areaCoords);
this.resizing=true;
this.resizeHandle=Event.element(e).classNames().toString().replace(/([^N|NE|E|SE|S|SW|W|NW])+/,"");
Event.stop(e);
},startDrag:function(e){
this.selArea.show();
this.clickCoords=this.getCurPos(e);
this.setAreaCoords({x1:this.clickCoords.x,y1:this.clickCoords.y,x2:this.clickCoords.x,y2:this.clickCoords.y},false,false,null);
this.dragging=true;
this.onDrag(e);
Event.stop(e);
},getCurPos:function(e){
var el=this.imgWrap,wrapOffsets=Position.cumulativeOffset(el);
while(el.nodeName!="BODY"){
wrapOffsets[1]-=el.scrollTop||0;
wrapOffsets[0]-=el.scrollLeft||0;
el=el.parentNode;
}
return curPos={x:Event.pointerX(e)-wrapOffsets[0],y:Event.pointerY(e)-wrapOffsets[1]};
},onDrag:function(e){
if(this.dragging||this.resizing){
var _54=null;
var _55=this.getCurPos(e);
var _56=this.cloneCoords(this.areaCoords);
var _57={x:1,y:1};
if(this.dragging){
if(_55.x<this.clickCoords.x){
_57.x=-1;
}
if(_55.y<this.clickCoords.y){
_57.y=-1;
}
this.transformCoords(_55.x,this.clickCoords.x,_56,"x");
this.transformCoords(_55.y,this.clickCoords.y,_56,"y");
}else{
if(this.resizing){
_54=this.resizeHandle;
if(_54.match(/E/)){
this.transformCoords(_55.x,this.startCoords.x1,_56,"x");
if(_55.x<this.startCoords.x1){
_57.x=-1;
}
}else{
if(_54.match(/W/)){
this.transformCoords(_55.x,this.startCoords.x2,_56,"x");
if(_55.x<this.startCoords.x2){
_57.x=-1;
}
}
}
if(_54.match(/N/)){
this.transformCoords(_55.y,this.startCoords.y2,_56,"y");
if(_55.y<this.startCoords.y2){
_57.y=-1;
}
}else{
if(_54.match(/S/)){
this.transformCoords(_55.y,this.startCoords.y1,_56,"y");
if(_55.y<this.startCoords.y1){
_57.y=-1;
}
}
}
}
}
this.setAreaCoords(_56,false,e.shiftKey,_57,_54);
this.drawArea();
Event.stop(e);
}
},transformCoords:function(_58,_59,_5a,_5b){
var _5c=[_58,_59];
if(_58>_59){
_5c.reverse();
}
_5a[_5b+"1"]=_5c[0];
_5a[_5b+"2"]=_5c[1];
},endCrop:function(){
this.dragging=false;
this.resizing=false;
this.options.onEndCrop(this.areaCoords,{width:this.calcW(),height:this.calcH()});
},subInitialize:function(){
},subDrawArea:function(){
}};
Cropper.ImgWithPreview=Class.create();
Object.extend(Object.extend(Cropper.ImgWithPreview.prototype,Cropper.Img.prototype),{subInitialize:function(){
this.hasPreviewImg=false;
if(typeof (this.options.previewWrap)!="undefined"&&this.options.minWidth>0&&this.options.minHeight>0){
this.previewWrap=$(this.options.previewWrap);
this.previewImg=this.img.cloneNode(false);
this.previewImg.id="imgCrop_"+this.previewImg.id;
this.options.displayOnInit=true;
this.hasPreviewImg=true;
this.previewWrap.addClassName("imgCrop_previewWrap");
this.previewWrap.setStyle({width:this.options.minWidth+"px",height:this.options.minHeight+"px"});
this.previewWrap.appendChild(this.previewImg);
}
},subDrawArea:function(){
if(this.hasPreviewImg){
var _5d=this.calcW();
var _5e=this.calcH();
var _5f={x:this.imgW/_5d,y:this.imgH/_5e};
var _60={x:_5d/this.options.minWidth,y:_5e/this.options.minHeight};
var _61={w:Math.ceil(this.options.minWidth*_5f.x)+"px",h:Math.ceil(this.options.minHeight*_5f.y)+"px",x:"-"+Math.ceil(this.areaCoords.x1/_60.x)+"px",y:"-"+Math.ceil(this.areaCoords.y1/_60.y)+"px"};
var _62=this.previewImg.style;
_62.width=_61.w;
_62.height=_61.h;
_62.left=_61.x;
_62.top=_61.y;
}
}});