/**
 * jQuery lightBox plugin
 * This jQuery plugin was inspired and based on Lightbox 2 by Lokesh Dhakar (http://www.huddletogether.com/projects/lightbox2/)
 * and adapted to me for use like a plugin from jQuery.
 * @name jquery-lightbox-0.4.min.js
 * @author Leandro Vieira Pinho - http://leandrovieira.com
 * @version 0.4
 * @date November 17, 2007
 * @category jQuery plugin
 * @copyright (c) 2007 Leandro Vieira Pinho (leandrovieira.com)
 * @license CC Attribution-No Derivative Works 2.5 Brazil - http://creativecommons.org/licenses/by-nd/2.5/br/deed.en_US
 * @example Visit http://leandrovieira.com/projects/jquery/lightbox/ for more informations about this jQuery plugin
 */
(function($) {
    $.fn.lightBox=function(settings) {
        settings=jQuery.extend( {
            overlayBgColor:'#000',overlayOpacity:0.8,imageLoading:'gfx/lightbox-ico-loading.gif',imageBtnPrev:'gfx/lightbox-btn-prev.gif',imageBtnNext:'gfx/lightbox-btn-next.gif',imageBtnClose:'gfx/lightbox-btn-close.gif',imageBlank:'gfx/lightbox-blank.gif',containerBorderSize:10,containerResizeSpeed:400,txtImage:'Image',txtOf:'of',keyToClose:'c',keyToPrev:'p',keyToNext:'n',imageArray:[],activeImage:0
        }
        ,settings);
        var jQueryMatchedObj=this;

        function _initialize() {
            _start(this,jQueryMatchedObj);
            return false;
        }

        function _start(objClicked,jQueryMatchedObj) {
            $('embed, object, select').css( {
                'visibility':'hidden'
            }
            );
            _set_interface();
            settings.imageArray.length=0;
            settings.activeImage=0;
            if(jQueryMatchedObj.length==1) {
                settings.imageArray.push(new Array(objClicked.getAttribute('href'),objClicked.getAttribute('title')));
            } else {
                for(var i=0;i<jQueryMatchedObj.length;i++) {
                    settings.imageArray.push(new Array(jQueryMatchedObj[i].getAttribute('href'),jQueryMatchedObj[i].getAttribute('title')));
                }
            } while(settings.imageArray[settings.activeImage][0]!=objClicked.getAttribute('href')) {
                settings.activeImage++;
            }
            _set_image_to_view();
        }

        function _set_interface() {
            $('body').append('<div id="jquery-overlay"></div><div id="jquery-lightbox"><div id="lightbox-container-image-box"><div id="lightbox-container-image"><img id="lightbox-image"><div style="" id="lightbox-nav"><a href="#" id="lightbox-nav-btnPrev"></a><a href="#" id="lightbox-nav-btnNext"></a></div><div id="lightbox-loading"><a href="#" id="lightbox-loading-link"><img src="'+settings.imageLoading+'"></a></div></div></div><div id="lightbox-container-image-data-box"><div id="lightbox-container-image-data"><div id="lightbox-image-details"><span id="lightbox-image-details-caption"></span><span id="lightbox-image-details-currentNumber"></span></div><div id="lightbox-secNav"><a href="#" id="lightbox-secNav-btnClose"><img src="'+settings.imageBtnClose+'"></a></div></div></div></div>');
            var arrPageSizes=___getPageSize();
            $('#jquery-overlay').css( {
                backgroundColor:settings.overlayBgColor,opacity:settings.overlayOpacity,width:arrPageSizes[0],height:arrPageSizes[1]
            }
            ).fadeIn();
            var arrPageScroll=___getPageScroll();
            $('#jquery-lightbox').css( {
                top:arrPageScroll[1]+(arrPageSizes[3]/10),left:arrPageScroll[0]
            }
            ).show();
            $('#jquery-overlay,#jquery-lightbox').click(function() {
                _finish();
            }
            );
            $('#lightbox-loading-link,#lightbox-secNav-btnClose').click(function() {
                _finish();
                return false;
            }
            );
            $(window).resize(function() {
                var arrPageSizes=___getPageSize();
                $('#jquery-overlay').css( {
                    width:arrPageSizes[0],height:arrPageSizes[1]
                }
                );
                var arrPageScroll=___getPageScroll();
                $('#jquery-lightbox').css( {
                    top:arrPageScroll[1]+(arrPageSizes[3]/10),left:arrPageScroll[0]
                }
                );
            }
            );
        }

        function _set_image_to_view() {
            $('#lightbox-loading').show();
            $('#lightbox-image,#lightbox-nav,#lightbox-nav-btnPrev,#lightbox-nav-btnNext,#lightbox-container-image-data-box,#lightbox-image-details-currentNumber').hide();
            var objImagePreloader=new Image();
            objImagePreloader.onload=function() {
                $('#lightbox-image').attr('src',settings.imageArray[settings.activeImage][0]);
                _resize_container_image_box(objImagePreloader.width,objImagePreloader.height);
                objImagePreloader.onload=function() {
                }
                ;
            }
            ;
            objImagePreloader.src=settings.imageArray[settings.activeImage][0];
        }
        ;

        function _resize_container_image_box(intImageWidth,intImageHeight) {
            var intCurrentWidth=$('#lightbox-container-image-box').width();
            var intCurrentHeight=$('#lightbox-container-image-box').height();
            var intWidth=(intImageWidth+(settings.containerBorderSize*2));
            var intHeight=(intImageHeight+(settings.containerBorderSize*2));
            var intDiffW=intCurrentWidth-intWidth;
            var intDiffH=intCurrentHeight-intHeight;
            $('#lightbox-container-image-box').animate( {
                width:intWidth,height:intHeight
            }
            ,settings.containerResizeSpeed,function() {
                _show_image();
            }
            );
            if((intDiffW==0)&&(intDiffH==0)) {
                if($.browser.msie) {
                    ___pause(250);
                } else {
                    ___pause(100);
                }
            }
            $('#lightbox-nav-btnPrev,#lightbox-nav-btnNext').css( {
                height:intImageHeight+(settings.containerBorderSize*2)
            }
            );
            $('#lightbox-container-image-data-box').css( {
                width:intImageWidth
            }
            );
        }
        ;

        function _show_image() {
            $('#lightbox-loading').hide();
            $('#lightbox-image').fadeIn(function() {
                _show_image_data();
                _set_navigation();
            }
            );
            _preload_neighbor_images();
        }
        ;

        function _show_image_data() {
            $('#lightbox-container-image-data-box').slideDown('fast');
            $('#lightbox-image-details-caption').hide();
            if(settings.imageArray[settings.activeImage][1]) {
                $('#lightbox-image-details-caption').html(settings.imageArray[settings.activeImage][1]).show();
            }
            if(settings.imageArray.length>1) {
                $('#lightbox-image-details-currentNumber').html(settings.txtImage+' '+(settings.activeImage+1)+' '+settings.txtOf+' '+settings.imageArray.length).show();
            }
        }

        function _set_navigation() {
            $('#lightbox-nav').show();
            $('#lightbox-nav-btnPrev,#lightbox-nav-btnNext').css( {
                'background':'transparent url('+settings.imageBlank+') no-repeat'
            }
            );
            if(settings.activeImage!=0) {
                $('#lightbox-nav-btnPrev').unbind().hover(function() {
                    $(this).css( {
                        'background':'url('+settings.imageBtnPrev+') left 15% no-repeat'
                    }
                    );
                }
                ,function() {
                    $(this).css( {
                        'background':'transparent url('+settings.imageBlank+') no-repeat'
                    }
                    );
                }
                ).show().bind('click',function() {
                    settings.activeImage=settings.activeImage-1;
                    _set_image_to_view();
                    return false;
                }
                );
            }
            if(settings.activeImage!=(settings.imageArray.length-1)) {
                $('#lightbox-nav-btnNext').unbind().hover(function() {
                    $(this).css( {
                        'background':'url('+settings.imageBtnNext+') right 15% no-repeat'
                    }
                    );
                }
                ,function() {
                    $(this).css( {
                        'background':'transparent url('+settings.imageBlank+') no-repeat'
                    }
                    );
                }
                ).show().bind('click',function() {
                    settings.activeImage=settings.activeImage+1;
                    _set_image_to_view();
                    return false;
                }
                );
            }
            _enable_keyboard_navigation();
        }

        function _enable_keyboard_navigation() {
            $(document).keydown(function(objEvent) {
                _keyboard_action(objEvent);
            }
            );
        }

        function _disable_keyboard_navigation() {
            $(document).unbind();
        }

        function _keyboard_action(objEvent) {
            if(objEvent==null) {
                keycode=event.keyCode;
                escapeKey=27;
            } else {
                keycode=objEvent.keyCode;
                escapeKey=objEvent.DOM_VK_ESCAPE;
            }
            key=String.fromCharCode(keycode).toLowerCase();
            if((key==settings.keyToClose)||(key=='x')||(keycode==escapeKey)) {
                _finish();
            }
            if((key==settings.keyToPrev)||(keycode==37)) {
                if(settings.activeImage!=0) {
                    settings.activeImage=settings.activeImage-1;
                    _set_image_to_view();
                    _disable_keyboard_navigation();
                }
            }
            if((key==settings.keyToNext)||(keycode==39)) {
                if(settings.activeImage!=(settings.imageArray.length-1)) {
                    settings.activeImage=settings.activeImage+1;
                    _set_image_to_view();
                    _disable_keyboard_navigation();
                }
            }
        }

        function _preload_neighbor_images() {
            if((settings.imageArray.length-1)>settings.activeImage) {
                objNext=new Image();
                objNext.src=settings.imageArray[settings.activeImage+1][0];
            }
            if(settings.activeImage>0) {
                objPrev=new Image();
                objPrev.src=settings.imageArray[settings.activeImage-1][0];
            }
        }

        function _finish() {
            $('#jquery-lightbox').remove();
            $('#jquery-overlay').fadeOut(function() {
                $('#jquery-overlay').remove();
            }
            );
            $('embed, object, select').css( {
                'visibility':'visible'
            }
            );
        }

        function ___getPageSize() {
            var xScroll,yScroll;
            if(window.innerHeight&&window.scrollMaxY) {
                xScroll=window.innerWidth+window.scrollMaxX;
                yScroll=window.innerHeight+window.scrollMaxY;
            } else if(document.body.scrollHeight>document.body.offsetHeight) {
                xScroll=document.body.scrollWidth;
                yScroll=document.body.scrollHeight;
            } else {
                xScroll=document.body.offsetWidth;
                yScroll=document.body.offsetHeight;
            }
            var windowWidth,windowHeight;
            if(self.innerHeight) {
                if(document.documentElement.clientWidth) {
                    windowWidth=document.documentElement.clientWidth;
                } else {
                    windowWidth=self.innerWidth;
                }
                windowHeight=self.innerHeight;
            } else if(document.documentElement&&document.documentElement.clientHeight) {
                windowWidth=document.documentElement.clientWidth;
                windowHeight=document.documentElement.clientHeight;
            } else if(document.body) {
                windowWidth=document.body.clientWidth;
                windowHeight=document.body.clientHeight;
            }
            if(yScroll<windowHeight) {
                pageHeight=windowHeight;
            } else {
                pageHeight=yScroll;
            }
            if(xScroll<windowWidth) {
                pageWidth=xScroll;
            } else {
                pageWidth=windowWidth;
            }
            arrayPageSize=new Array(pageWidth,pageHeight,windowWidth,windowHeight);
            return arrayPageSize;
        }
        ;

        function ___getPageScroll() {
            var xScroll,yScroll;
            if(self.pageYOffset) {
                yScroll=self.pageYOffset;
                xScroll=self.pageXOffset;
            } else if(document.documentElement&&document.documentElement.scrollTop) {
                yScroll=document.documentElement.scrollTop;
                xScroll=document.documentElement.scrollLeft;
            } else if(document.body) {
                yScroll=document.body.scrollTop;
                xScroll=document.body.scrollLeft;
            }
            arrayPageScroll=new Array(xScroll,yScroll);
            return arrayPageScroll;
        }
        ;

        function ___pause(ms) {
            var date=new Date();
            curDate=null;
            do {
                var curDate=new Date();
            } while(curDate-date<ms);
        }
        ;
        return this.unbind('click').click(_initialize);
    }
    ;
}
)(jQuery);