"

From 2014.igem.org

// VERSION: 2.3 LAST UPDATE: 11.07.2013 /*

* Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php
* 
* Made by Wilq32, wilq32@gmail.com, Wroclaw, Poland, 01.2009
* Website: http://code.google.com/p/jqueryrotate/ 
*/

(function($) {

   var supportedCSS,supportedCSSOrigin, styles=document.getElementsByTagName("head")[0].style,toCheck="transformProperty WebkitTransform OTransform msTransform MozTransform".split(" ");
   for (var a = 0; a < toCheck.length; a++) if (styles[toCheck[a]] !== undefined) { supportedCSS = toCheck[a]; }
   if (supportedCSS) {
     supportedCSSOrigin = supportedCSS.replace(/[tT]ransform/,"TransformOrigin");
     if (supportedCSSOrigin[0] == "T") supportedCSSOrigin[0] = "t";
   }

   // Bad eval to preven google closure to remove it from code o_O
   eval('IE = "v"=="\v"');

   jQuery.fn.extend({
       rotate:function(parameters)
       {
         if (this.length===0||typeof parameters=="undefined") return;
         if (typeof parameters=="number") parameters={angle:parameters};
         var returned=[];
         for (var i=0,i0=this.length;i<i0;i++)
         {
           var element=this.get(i);	
           if (!element.Wilq32 || !element.Wilq32.PhotoEffect) {

             var paramClone = $.extend(true, {}, parameters); 
             var newRotObject = new Wilq32.PhotoEffect(element,paramClone)._rootObj;

             returned.push($(newRotObject));
           }
           else {
             element.Wilq32.PhotoEffect._handleRotation(parameters);
           }
         }
         return returned;
       },
       getRotateAngle: function(){
         var ret = [];
         for (var i=0,i0=this.length;i<i0;i++)
         {
           var element=this.get(i);	
           if (element.Wilq32 && element.Wilq32.PhotoEffect) {
             ret[i] = element.Wilq32.PhotoEffect._angle;
           }
         }
         return ret;
       },
       stopRotate: function(){
         for (var i=0,i0=this.length;i<i0;i++)
         {
           var element=this.get(i);	
           if (element.Wilq32 && element.Wilq32.PhotoEffect) {
             clearTimeout(element.Wilq32.PhotoEffect._timer);
           }
         }
       }
   });

   // Library agnostic interface

   Wilq32=window.Wilq32||{};
   Wilq32.PhotoEffect=(function(){

     if (supportedCSS) {
       return function(img,parameters){
         img.Wilq32 = {
           PhotoEffect: this
         };

         this._img = this._rootObj = this._eventObj = img;
         this._handleRotation(parameters);
       }
     } else {
       return function(img,parameters) {
         this._img = img;
         this._onLoadDelegate = [parameters];

         this._rootObj=document.createElement('span');
         this._rootObj.style.display="inline-block";
         this._rootObj.Wilq32 = 
           {
             PhotoEffect: this
           };
         img.parentNode.insertBefore(this._rootObj,img);

         if (img.complete) {
           this._Loader();
         } else {
           var self=this;
           // TODO: Remove jQuery dependency
           jQuery(this._img).bind("load", function(){ self._Loader(); });
         }
       }
     }
   })();

   Wilq32.PhotoEffect.prototype = {
     _setupParameters : function (parameters){
       this._parameters = this._parameters || {};
       if (typeof this._angle !== "number") { this._angle = 0 ; }
       if (typeof parameters.angle==="number") { this._angle = parameters.angle; }
       this._parameters.animateTo = (typeof parameters.animateTo === "number") ? (parameters.animateTo) : (this._angle); 

       this._parameters.step = parameters.step || this._parameters.step || null;
       this._parameters.easing = parameters.easing || this._parameters.easing || this._defaultEasing;
       this._parameters.duration = parameters.duration || this._parameters.duration || 1000;
       this._parameters.callback = parameters.callback || this._parameters.callback || this._emptyFunction;
       this._parameters.center = parameters.center || this._parameters.center || ["50%","50%"];
       if (typeof this._parameters.center[0] == "string") {
         this._rotationCenterX = (parseInt(this._parameters.center[0],10) / 100) * this._imgWidth * this._aspectW;
       } else {
         this._rotationCenterX = this._parameters.center[0];
       }
       if (typeof this._parameters.center[1] == "string") {
         this._rotationCenterY = (parseInt(this._parameters.center[1],10) / 100) * this._imgHeight * this._aspectH;
       } else {
         this._rotationCenterY = this._parameters.center[1];
       }

       if (parameters.bind && parameters.bind != this._parameters.bind) { this._BindEvents(parameters.bind); }
     },
     _emptyFunction: function(){},
     _defaultEasing: function (x, t, b, c, d) { return -c * ((t=t/d-1)*t*t*t - 1) + b }, 
     _handleRotation : function(parameters, dontcheck){
       if (!supportedCSS && !this._img.complete && !dontcheck) {
         this._onLoadDelegate.push(parameters);
         return;
       }
       this._setupParameters(parameters);
       if (this._angle==this._parameters.animateTo) {
         this._rotate(this._angle);
       }
       else { 
         this._animateStart();          
       }
     },

     _BindEvents:function(events){
       if (events && this._eventObj) 
       {
         // Unbinding previous Events
         if (this._parameters.bind){
           var oldEvents = this._parameters.bind;
           for (var a in oldEvents) if (oldEvents.hasOwnProperty(a)) 
             // TODO: Remove jQuery dependency
             jQuery(this._eventObj).unbind(a,oldEvents[a]);
         }

       this._parameters.bind = events;
       for (var a in events) if (events.hasOwnProperty(a)) 
         // TODO: Remove jQuery dependency
         jQuery(this._eventObj).bind(a,events[a]);
       }
     },

     _Loader:(function()
     {
       if (IE)
         return function() {
           var width=this._img.width;
           var height=this._img.height;
           this._imgWidth = width;
           this._imgHeight = height; 
           this._img.parentNode.removeChild(this._img);

           this._vimage = this.createVMLNode('image');
           this._vimage.src=this._img.src;
           this._vimage.style.height=height+"px";
           this._vimage.style.width=width+"px";
           this._vimage.style.position="absolute"; // FIXES IE PROBLEM - its only rendered if its on absolute position!
           this._vimage.style.top = "0px";
           this._vimage.style.left = "0px";
           this._aspectW = this._aspectH = 1;

           /* Group minifying a small 1px precision problem when rotating object */
           this._container = this.createVMLNode('group');
           this._container.style.width=width;
           this._container.style.height=height;
           this._container.style.position="absolute";
           this._container.style.top="0px";
           this._container.style.left="0px";
           this._container.setAttribute('coordsize',width-1+','+(height-1)); // This -1, -1 trying to fix ugly problem with small displacement on IE
           this._container.appendChild(this._vimage);

           this._rootObj.appendChild(this._container);
           this._rootObj.style.position="relative"; // FIXES IE PROBLEM
           this._rootObj.style.width=width+"px";
           this._rootObj.style.height=height+"px";
           this._rootObj.setAttribute('id',this._img.getAttribute('id'));
           this._rootObj.className=this._img.className;			
           this._eventObj = this._rootObj;	
           var parameters;
           while (parameters = this._onLoadDelegate.shift()) {
             this._handleRotation(parameters, true);	
           }
         }
         else return function () {
           this._rootObj.setAttribute('id',this._img.getAttribute('id'));
           this._rootObj.className=this._img.className;

           this._imgWidth=this._img.naturalWidth;
           this._imgHeight=this._img.naturalHeight;
           var _widthMax=Math.sqrt((this._imgHeight)*(this._imgHeight) + (this._imgWidth) * (this._imgWidth));
           this._width = _widthMax * 3;
           this._height = _widthMax * 3;

           this._aspectW = this._img.offsetWidth/this._img.naturalWidth;
           this._aspectH = this._img.offsetHeight/this._img.naturalHeight;

           this._img.parentNode.removeChild(this._img);	

           this._canvas=document.createElement('canvas');
           this._canvas.setAttribute('width',this._width);
           this._canvas.style.position="relative";
           this._canvas.style.left = -this._img.height * this._aspectW + "px";
           this._canvas.style.top = -this._img.width * this._aspectH + "px";
           this._canvas.Wilq32 = this._rootObj.Wilq32;

           this._rootObj.appendChild(this._canvas);
           this._rootObj.style.width=this._img.width*this._aspectW+"px";
           this._rootObj.style.height=this._img.height*this._aspectH+"px";
           this._eventObj = this._canvas;

           this._cnv=this._canvas.getContext('2d');
           var parameters;
           while (parameters = this._onLoadDelegate.shift()) {
             this._handleRotation(parameters, true);	
           }
         }
     })(),

     _animateStart:function()
     {	
       if (this._timer) {
         clearTimeout(this._timer);
       }
       this._animateStartTime = +new Date;
       this._animateStartAngle = this._angle;
       this._animate();
     },
     _animate:function()
     {
       var actualTime = +new Date;
       var checkEnd = actualTime - this._animateStartTime > this._parameters.duration;

       // TODO: Bug for animatedGif for static rotation ? (to test)
       if (checkEnd && !this._parameters.animatedGif) 
       {
         clearTimeout(this._timer);
       }
       else 
       {
         if (this._canvas||this._vimage||this._img) {
           var angle = this._parameters.easing(0, actualTime - this._animateStartTime, this._animateStartAngle, this._parameters.animateTo - this._animateStartAngle, this._parameters.duration);
           this._rotate((~~(angle*10))/10);
         }
         if (this._parameters.step) {
           this._parameters.step(this._angle);
         }
         var self = this;
         this._timer = setTimeout(function()
         {
           self._animate.call(self);
         }, 10);
       }

     // To fix Bug that prevents using recursive function in callback I moved this function to back
     if (this._parameters.callback && checkEnd){
       this._angle = this._parameters.animateTo;
       this._rotate(this._angle);
       this._parameters.callback.call(this._rootObj);
     }
     },

     _rotate : (function()
     {
       var rad = Math.PI/180;
       if (IE)
         return function(angle)
       {
         this._angle = angle;
         this._container.style.rotation=(angle%360)+"deg";
         this._vimage.style.top = -(this._rotationCenterY - this._imgHeight/2) + "px";
         this._vimage.style.left = -(this._rotationCenterX - this._imgWidth/2) + "px";
         this._container.style.top = this._rotationCenterY - this._imgHeight/2 + "px";
         this._container.style.left = this._rotationCenterX - this._imgWidth/2 + "px";

       }
         else if (supportedCSS)
         return function(angle){
           this._angle = angle;
           this._img.style[supportedCSS]="rotate("+(angle%360)+"deg)";
           this._img.style[supportedCSSOrigin]=this._parameters.center.join(" ");
         }
         else 
           return function(angle)
         {
           this._angle = angle;
           angle=(angle%360)* rad;
           // clear canvas	
           this._canvas.width = this._width;//+this._widthAdd;
           this._canvas.height = this._height;//+this._heightAdd;

           // REMEMBER: all drawings are read from backwards.. so first function is translate, then rotate, then translate, translate..
           this._cnv.translate(this._imgWidth*this._aspectW,this._imgHeight*this._aspectH);	// at least center image on screen
           this._cnv.translate(this._rotationCenterX,this._rotationCenterY);			// we move image back to its orginal 
           this._cnv.rotate(angle);										// rotate image
           this._cnv.translate(-this._rotationCenterX,-this._rotationCenterY);		// move image to its center, so we can rotate around its center
           this._cnv.scale(this._aspectW,this._aspectH); // SCALE - if needed ;)
           this._cnv.drawImage(this._img, 0, 0);							// First - we draw image
         }

     })()
     }

     if (IE)
     {
       Wilq32.PhotoEffect.prototype.createVMLNode=(function(){
         document.createStyleSheet().addRule(".rvml", "behavior:url(#default#VML)");
         try {
           !document.namespaces.rvml && document.namespaces.add("rvml", "urn:schemas-microsoft-com:vml");
           return function (tagName) {
             return document.createElement('<rvml:' + tagName + ' class="rvml">');
           };
         } catch (e) {
           return function (tagName) {
             return document.createElement('<' + tagName + ' xmlns="urn:schemas-microsoft.com:vml" class="rvml">');
           };
         }		
       })();
     }

})(jQuery);