/*

    AnythingZoomer
    a jQuery Plugin

    by: Chris Coyier
    http://css-tricks

    Version: 1.0

    Note: You can do whatever the heck you want with this.

*/

(function(jQuery) {

    jQuery.anythingZoomer = {

        defaults: {
            smallArea: "#small",
            largeArea: "#large",
            zoomPort: "#overlay",
            mover: "#mover",
            expansionSize: 30,
            speedMultiplier: 1.5

        }

    }

    jQuery.fn.extend({
        anythingZoomer:function(config) {

            var config = jQuery.extend({}, jQuery.anythingZoomer.defaults, config);

            var wrap = jQuery(this);

            var smallArea = jQuery(config.smallArea);
            var largeArea = jQuery(config.largeArea);
            var zoomPort = jQuery(config.zoomPort);
            var mover = jQuery(config.mover);

            var expansionSize = config.expansionSize;
            var speedMultiplier = config.speedMultiplier;

            function setup(smallArea, largeArea, wrap, zoomPort, mover, expansionSize, speedMultiplier) {

                smallArea
                    .show();

                zoomPort
                    .fadeIn();

                mover
                    .css({
                        width: mover.data("origWidth"),
                        height: mover.data("origHeight"),
                        overflow: "hidden",
                        position: "absolute"
                    })

                wrap
                    .css({
                        width: "auto"
                    })
            		.hover(function(){
            		     mover.fadeIn();
            		})
            		.mousemove(function(e){

            			var x = e.pageX - smallArea.offset().left;
            			var y = e.pageY - smallArea.offset().top;

            			if ( (x < -expansionSize) || (x > smallArea.width() + expansionSize) || (y < -expansionSize) || (y > smallArea.height() + expansionSize) ) {
            			     mover.fadeOut(100);
            			}

            			mover.css({
            				top: y - 50,
            				left: x - 50
            			});

            			largeArea.css({

            			    left: (-(e.pageX - smallArea.offset().left)*speedMultiplier)+expansionSize,
            			    top: (-(e.pageY - smallArea.offset().top)*speedMultiplier)+expansionSize

            			});

            		})
            		.dblclick(function() {

                        expand(smallArea, largeArea, wrap, zoomPort, mover, expansionSize, speedMultiplier);

            		});

            };

            function expand(smallArea, largeArea, wrap, zoomPort, mover, expansionSize, speedMultiplier) {

                  smallArea
        		      .hide();

        		  zoomPort
        		      .hide();

        		  mover
        		      .fadeIn()
        		      .data("origWidth", mover.width())
        		      .data("origHeight", mover.height())
        		      .css({
        		          position: "static",
        		          height: "auto",
        		          width: "auto",
        			      overflow: "visible"
        		      });

        		  wrap
        		      .css({
        		          width: "100%"
        		      })
        		      .unbind()
        		      .dblclick(function(){
        		          setup(smallArea, largeArea, wrap, zoomPort, mover, expansionSize, speedMultiplier);
        		      });


        		  largeArea
        		      .css({
        		          left: 0,
        		          top: 0,
        		          width: largeArea.data("origWidth")
        		      });

            };

            mover
		      .data("origWidth", mover.width())
		      .data("origHeight", mover.height());

		    // Because the largeArea is often hidden, the width() function returns zero, take width from CSS instead
		    largeArea
		      .data("origWidth", largeArea.css("width"));

            setup(smallArea, largeArea, wrap, zoomPort, mover, expansionSize, speedMultiplier);

            return this;

        }

    });

})(jQuery);