// version: 2.2 last update: 13.03.2012
/* 
 * 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/ 
 */

// documentation removed from script file (was kinda useless and outdated)

(function($) {
var supportedcss,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];
// bad eval to preven google closure to remove it from code o_o
// after compresion replace it back to var ie = 'v' == '\v'
var ie = eval('"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) {
			// make sure that class and id are also copied - just in case you would like to refeer to an newly created object
            this._img = img;

			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(parameters);
			} else {
				var self=this;
				// todo: remove jquery dependency
				jquery(this._img).bind("load", function()
				{
					self._loader(parameters);
				});
			}
		}
	}
})();

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 || function (x, t, b, c, d) { return -c * ((t=t/d-1)*t*t*t - 1) + b; }
		this._parameters.duration = parameters.duration || this._parameters.duration || 1000;
        this._parameters.callback = parameters.callback || this._parameters.callback || function(){};
        if (parameters.bind && parameters.bind != this._parameters.bind) this._bindevents(parameters.bind); 
	},
	_handlerotation : function(parameters){
          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(parameters)
		{
			var width=this._img.width;
			var height=this._img.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";

			/* 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.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;	
		    this._handlerotation(parameters);	
		}
		else
		return function (parameters)
		{
			this._rootobj.setattribute('id',this._img.getattribute('id'));
			this._rootobj.classname=this._img.classname;
			
			this._width=this._img.width;
			this._height=this._img.height;
			this._widthhalf=this._width/2; // used for optimisation
			this._heighthalf=this._height/2;// used for optimisation
			
			var _widthmax=math.sqrt((this._height)*(this._height) + (this._width) * (this._width));

			this._widthadd = _widthmax - this._width;
			this._heightadd = _widthmax - this._height;	// widthmax because maxwidth=maxheight
			this._widthaddhalf=this._widthadd/2; // used for optimisation
			this._heightaddhalf=this._heightadd/2;// used for optimisation
			
			this._img.parentnode.removechild(this._img);	
			
			this._aspectw = ((parseint(this._img.style.width,10)) || this._width)/this._img.width;
			this._aspecth = ((parseint(this._img.style.height,10)) || this._height)/this._img.height;
			
			this._canvas=document.createelement('canvas');
			this._canvas.setattribute('width',this._width);
			this._canvas.style.position="relative";
			this._canvas.style.left = -this._widthaddhalf + "px";
			this._canvas.style.top = -this._heightaddhalf + "px";
			this._canvas.wilq32 = this._rootobj.wilq32;
			
			this._rootobj.appendchild(this._canvas);
			this._rootobj.style.width=this._width+"px";
			this._rootobj.style.height=this._height+"px";
            this._eventobj = this._canvas;
			
			this._cnv=this._canvas.getcontext('2d');
            this._handlerotation(parameters);
		}
	})(),

	_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";
		}
		else if (supportedcss)
		return function(angle){
            this._angle = angle;
			this._img.style[supportedcss]="rotate("+(angle%360)+"deg)";
		}
		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._widthaddhalf,this._heightaddhalf);	// at least center image on screen
			this._cnv.translate(this._widthhalf,this._heighthalf);			// we move image back to its orginal 
			this._cnv.rotate(angle);										// rotate image
			this._cnv.translate(-this._widthhalf,-this._heighthalf);		// 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);