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jQuery.imgAreaSelect=function(img,options){var $area=jQuery('<div></div>'),$border1=jQuery('<div></div>'),$border2=jQuery('<div></div>'),$outLeft=jQuery('<div></div>'),$outTop=jQuery('<div></div>'),$outRight=jQuery('<div></div>'),$outBottom=jQuery('<div></div>'),imgOfs,imgWidth,imgHeight,zIndex=0,fixed=false,$p,startX,startY,moveX,moveY,resizeMargin=10,resize=[],V=0,H=1,d,aspectRatio,x1,x2,y1,y2,x,y,selection={x1:0,y1:0,x2:0,y2:0,width:0,height:0};var $a=$area.add($border1).add($border2);var $o=$outLeft.add($outTop).add($outRight).add($outBottom);function update(){$a.css({left:(selection.x1+imgOfs.left)+'px',top:(selection.y1+imgOfs.top)+'px',width:Math.max(selection.width-options.borderWidth*2,0)+'px',height:Math.max(selection.height-options.borderWidth*2,0)+'px'});$outLeft.css({left:imgOfs.left+'px',top:imgOfs.top+'px',width:selection.x1+'px',height:imgHeight+'px'});$outTop.css({left:imgOfs.left+selection.x1+'px',top:imgOfs.top+'px',width:selection.width+'px',height:selection.y1+'px'});$outRight.css({left:imgOfs.left+selection.x2+'px',top:imgOfs.top+'px',width:imgWidth-selection.x2+'px',height:imgHeight+'px'});$outBottom.css({left:imgOfs.left+selection.x1+'px',top:imgOfs.top+selection.y2+'px',width:selection.width+'px',height:imgHeight-selection.y2+'px'})}function areaMouseMove(event){x=event.pageX-selection.x1-imgOfs.left;y=event.pageY-selection.y1-imgOfs.top;resize=[];if(options.resizable){if(y<=resizeMargin)resize[V]='n';else if(y>=selection.height-resizeMargin)resize[V]='s';if(x<=resizeMargin)resize[H]='w';else if(x>=selection.width-resizeMargin)resize[H]='e'}$border2.css('cursor',resize.length?resize.join('')+'-resize':options.movable?'move':'')}function areaMouseDown(event){if(event.which!=1)return false;if(options.resizable&&resize.length>0){jQuery('body').css('cursor',resize.join('')+'-resize');x1=(resize[H]=='w'?selection.x2:selection.x1)+imgOfs.left;y1=(resize[V]=='n'?selection.y2:selection.y1)+imgOfs.top;jQuery(document).mousemove(selectingMouseMove);$border2.unbind('mousemove',areaMouseMove);jQuery(document).one('mouseup',function(){resize=[];jQuery('body').css('cursor','');if(options.autoHide)$a.add($o).hide();options.onSelectEnd(img,selection);jQuery(document).unbind('mousemove',selectingMouseMove);$border2.mousemove(areaMouseMove)})}else if(options.movable){moveX=selection.x1+imgOfs.left;moveY=selection.y1+imgOfs.top;startX=event.pageX;startY=event.pageY;jQuery(document).mousemove(movingMouseMove).one('mouseup',function(){options.onSelectEnd(img,selection);jQuery(document).unbind('mousemove',movingMouseMove)})}else jQuery(img).mousedown(event);return false}function aspectRatioXY(){x2=Math.max(imgOfs.left,Math.min(imgOfs.left+imgWidth,x1+Math.abs(y2-y1)*aspectRatio*(x2>x1?1:-1)));y2=Math.round(Math.max(imgOfs.top,Math.min(imgOfs.top+imgHeight,y1+Math.abs(x2-x1)/aspectRatio*(y2>y1?1:-1))));x2=Math.round(x2)}function aspectRatioYX(){y2=Math.max(imgOfs.top,Math.min(imgOfs.top+imgHeight,y1+Math.abs(x2-x1)/aspectRatio*(y2>y1?1:-1)));x2=Math.round(Math.max(imgOfs.left,Math.min(imgOfs.left+imgWidth,x1+Math.abs(y2-y1)*aspectRatio*(x2>x1?1:-1))));y2=Math.round(y2)}function selectingMouseMove(event){x2=!resize.length||resize[H]||aspectRatio?event.pageX:selection.x2+imgOfs.left;y2=!resize.length||resize[V]||aspectRatio?event.pageY:selection.y2+imgOfs.top;if(options.minWidth&&Math.abs(x2-x1)<options.minWidth){x2=x1-options.minWidth*(x2<x1?1:-1);if(x2<imgOfs.left)x1=imgOfs.left+options.minWidth;else if(x2>imgOfs.left+imgWidth)x1=imgOfs.left+imgWidth-options.minWidth}if(options.minHeight&&Math.abs(y2-y1)<options.minHeight){y2=y1-options.minHeight*(y2<y1?1:-1);if(y2<imgOfs.top)y1=imgOfs.top+options.minHeight;else if(y2>imgOfs.top+imgHeight)y1=imgOfs.top+imgHeight-options.minHeight}x2=Math.max(imgOfs.left,Math.min(x2,imgOfs.left+imgWidth));y2=Math.max(imgOfs.top,Math.min(y2,imgOfs.top+imgHeight));if(aspectRatio)if(Math.abs(x2-x1)/aspectRatio>Math.abs(y2-y1))aspectRatioYX();else aspectRatioXY();if(options.maxWidth&&Math.abs(x2-x1)>options.maxWidth){x2=x1-options.maxWidth*(x2<x1?1:-1);if(aspectRatio)aspectRatioYX()}if(options.maxHeight&&Math.abs(y2-y1)>options.maxHeight){y2=y1-options.maxHeight*(y2<y1?1:-1);if(aspectRatio)aspectRatioXY()}selection.x1=Math.min(x1,x2)-imgOfs.left;selection.x2=Math.max(x1,x2)-imgOfs.left;selection.y1=Math.min(y1,y2)-imgOfs.top;selection.y2=Math.max(y1,y2)-imgOfs.top;selection.width=Math.abs(x2-x1);selection.height=Math.abs(y2-y1);update();options.onSelectChange(img,selection);return false}function movingMouseMove(event){x1=Math.max(imgOfs.left,Math.min(moveX+event.pageX-startX,imgOfs.left+imgWidth-selection.width));y1=Math.max(imgOfs.top,Math.min(moveY+event.pageY-startY,imgOfs.top+imgHeight-selection.height));x2=x1+selection.width;y2=y1+selection.height;selection.x1=x1-imgOfs.left;selection.y1=y1-imgOfs.top;selection.x2=x2-imgOfs.left;selection.y2=y2-imgOfs.top;update();options.onSelectChange(img,selection);event.preventDefault();return false}function imgMouseDown(event){if(event.which!=1)return false;startX=x1=event.pageX;startY=y1=event.pageY;selection.x1=selection.x2=x1-imgOfs.left;selection.y1=selection.y2=y1-imgOfs.top;selection.width=0;selection.height=0;resize=[];update();$a.add($o).show();jQuery(document).mousemove(selectingMouseMove);$border2.unbind('mousemove',areaMouseMove);options.onSelectStart(img,selection);jQuery(document).one('mouseup',function(){if(options.autoHide)$a.add($o).hide();options.onSelectEnd(img,selection);jQuery(document).unbind('mousemove',selectingMouseMove);$border2.mousemove(areaMouseMove)});return false}this.setOptions=function(newOptions){options=jQuery.extend(options,newOptions);if(newOptions.x1!=null){selection.x1=newOptions.x1;selection.y1=newOptions.y1;selection.x2=newOptions.x2;selection.y2=newOptions.y2;newOptions.show=true}imgWidth=jQuery(img).width();imgHeight=jQuery(img).height();imgOfs=jQuery(img).offset();$p=jQuery(img);while($p.length&&!$p.is('body')){if(!isNaN($p.css('z-index'))&&$p.css('z-index')>zIndex)zIndex=$p.css('z-index');if($p.css('position')=='fixed')fixed=true;$p=$p.parent()}x1=selection.x1+imgOfs.left;y1=selection.y1+imgOfs.top;x2=selection.x2+imgOfs.left;y2=selection.y2+imgOfs.top;selection.width=x2-x1;selection.height=y2-y1;update();if(newOptions.hide)$a.add($o).hide();else if(newOptions.show)$a.add($o).show();$a.css({borderWidth:options.borderWidth+'px'});$area.css({backgroundColor:options.selectionColor,opacity:options.selectionOpacity});$border1.css({borderStyle:'solid',borderColor:options.borderColor1});$border2.css({borderStyle:'dashed',borderColor:options.borderColor2});$o.css({opacity:options.outerOpacity,backgroundColor:options.outerColor});aspectRatio=options.aspectRatio&&(d=options.aspectRatio.split(/:/))?d[0]/d[1]:null;if(options.disable||options.enable===false){$a.unbind('mousemove',areaMouseMove).unbind('mousedown',areaMouseDown);jQuery(img).add($o).unbind('mousedown',imgMouseDown)}else if(options.enable||options.disable===false){if(options.resizable||options.movable)$a.mousemove(areaMouseMove).mousedown(areaMouseDown);jQuery(img).add($o).mousedown(imgMouseDown)}options.enable=options.disable=undefined};if(jQuery.browser.msie)jQuery(img).attr('unselectable','on');$a.add($o).css({display:'none',position:fixed?'fixed':'absolute',overflow:'hidden',zIndex:zIndex>0?zIndex:null});$area.css({borderStyle:'solid'});jQuery('body').append($o.add($a));initOptions={borderColor1:'#000',borderColor2:'#fff',borderWidth:1,movable:true,resizable:true,selectionColor:'#fff',selectionOpacity:0.2,outerColor:'#000',outerOpacity:0.2,onSelectStart:function(){},onSelectChange:function(){},onSelectEnd:function(){}};options=jQuery.extend(initOptions,options);this.setOptions(options)};jQuery.fn.imgAreaSelect=function(options){options=options||{};this.each(function(){if(jQuery(this).data('imgAreaSelect'))jQuery(this).data('imgAreaSelect').setOptions(options);else{if(options.enable===undefined&&options.disable===undefined)options.enable=true;jQuery(this).data('imgAreaSelect',new jQuery.imgAreaSelect(this,options))}});return this};
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