/**

 * 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-0.5.js

 * @author Leandro Vieira Pinho - http://leandrovieira.com

 * @version 0.5

 * @date April 11, 2008

 * @category jQuery plugin

 * @copyright (c) 2008 Leandro Vieira Pinho (leandrovieira.com)

 * @license CCAttribution-ShareAlike 2.5 Brazil - http://creativecommons.org/licenses/by-sa/2.5/br/deed.en_US

 * @example Visit http://leandrovieira.com/projects/jquery/lightbox/ for more informations about this jQuery plugin

 */

// Offering a Custom Alias suport - More info: http://docs.jquery.com/Plugins/Authoring#Custom_Alias

(function($) {

    /**

     * $ is an alias to jQuery object

     *

     */

    $.fn.lightBox = function(settings) {

        // Settings to configure the jQuery lightBox plugin how you like

        settings = jQuery.extend({

            // Configuration related to overlay

            overlayBgColor:         '#000',     // (string) Background color to overlay; inform a hexadecimal value like: #RRGGBB. Where RR, GG, and BB are the hexadecimal values for the red, green, and blue values of the color.

            overlayOpacity:         0.8,        // (integer) Opacity value to overlay; inform: 0.X. Where X are number from 0 to 9

            // Configuration related to navigation

            fixedNavigation:        false,      // (boolean) Boolean that informs if the navigation (next and prev button) will be fixed or not in the interface.

            // Configuration related to images

            imageLoading:           lightbox_path + '/images/lightbox-ico-loading.gif',     // (string) Path and the name of the loading icon

            imageBtnPrev:           lightbox_path + '/images/lightbox-btn-prev.gif',            // (string) Path and the name of the prev button image

            imageBtnNext:           lightbox_path + '/images/lightbox-btn-next.gif',            // (string) Path and the name of the next button image

            imageBtnClose:          lightbox_path + '/images/lightbox-btn-close.gif',       // (string) Path and the name of thclose btn

            imageBlank:             lightbox_path + '/images/lightbox-blank.gif',           // (string) Path and the name of a blank image (one pixel)

            // Configuration related to container image box

            containerBorderSize:    10,         // (integer) If you adjust the padding in the CSS for the container, #lightbox-container-image-box, you will need to update this value

            containerResizeSpeed:   400,        // (integer) Specify the resize duration of container image. These number are miliseconds. 400 is default.

            // Configuration related to texts in caption. For example: Image 2 of 8. You can alter either "Image" and "of" texts.

            txtImage:               'Image',    // (string) Specify text "Image"

            txtOf:                  'of',       // (string) Specify text "of"

            // Configuration related to keyboard navigation

            keyToClose:             'c',        // (string) (c = close) Letter to close the jQuery lightBox interface. Beyond this letter, the letter X and the SCAPE key is used to.

            keyToPrev:              'p',        // (string) (p = previous) Letter to show the previous image

            keyToNext:              'n',        // (string) (n = next) Letter to show the next image.

            // Donīt alter these variables in any way

            imageArray:             [],

            activeImage:            0

        },settings);

        // Caching the jQuery object with all elements matched

        var jQueryMatchedObj = this; // This, in this context, refer to jQuery object

        /**

         * Initializing the plugin calling the start function

         *

         * @return boolean false

         */

        function _initialize() {

            _start(this,jQueryMatchedObj); // This, in this context, refer to object (link) which the user have clicked

            return false; // Avoid the browser following the link

        }

        /**

         * Start the jQuery lightBox plugin

         *

         * @param object objClicked The object (link) whick the user have clicked

         * @param object jQueryMatchedObj The jQuery object with all elements matched

         */

        function _start(objClicked,jQueryMatchedObj) {

            // Hime some elements to avoid conflict with overlay in IE. These elements appear above the overlay.

            $('embed, object, select').css({ 'visibility' : 'hidden' });

            // Call the function to create the markup structure; style some elements; assign events in some elements.

            _set_interface();

            // Unset total images in imageArray

            settings.imageArray.length = 0;

            // Unset image active information

            settings.activeImage = 0;

            // We have an image set? Or just an image? Letīs see it.

            if ( jQueryMatchedObj.length == 1 ) {

                settings.imageArray.push(new Array(objClicked.getAttribute('href'),objClicked.getAttribute('title')));

            } else {

                // Add an Array (as many as we have), with href and title atributes, inside the Array that storage the images references        

                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++;

            }

            // Call the function that prepares image exibition

            _set_image_to_view();

        }

        /**

         * Create the jQuery lightBox plugin interface

         *

         * The HTML markup will be like that:

            <div id="jquery-overlay"></div>

            <div id="jquery-lightbox">

                <div id="lightbox-container-image-box">

                    <div id="lightbox-container-image">

                        <img src="../fotos/XX.jpg" id="lightbox-image">

                        <div 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="../images/lightbox-ico-loading.gif">

                            </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="../images/lightbox-btn-close.gif">

                            </a>

                        </div>

                    </div>

                </div>

            </div>

         *

         */

        function _set_interface() {

            // Apply the HTML markup into body tag

            $('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>');   

            // Get page sizes

            var arrPageSizes = ___getPageSize();

            // Style overlay and show it

            $('#jquery-overlay').css({

                backgroundColor:    settings.overlayBgColor,

                opacity:            settings.overlayOpacity,

                width:              arrPageSizes[0],

                height:             arrPageSizes[1]

            }).fadeIn();

            // Get page scroll

            var arrPageScroll = ___getPageScroll();

            // Calculate top and left offset for the jquery-lightbox div object and show it

            $('#jquery-lightbox').css({

                top:    arrPageScroll[1] + (arrPageSizes[3] / 10),

                left:   arrPageScroll[0]

            }).show();

            // Assigning click events in elements to close overlay

            $('#jquery-overlay,#jquery-lightbox').click(function() {

                _finish();                                  

            });

            // Assign the _finish function to lightbox-loading-link and lightbox-secNav-btnClose objects

            $('#lightbox-loading-link,#lightbox-secNav-btnClose').click(function() {

                _finish();

                return false;

            });

            // If window was resized, calculate the new overlay dimensions

            $(window).resize(function() {

                // Get page sizes

                var arrPageSizes = ___getPageSize();

                // Style overlay and show it

                $('#jquery-overlay').css({

                    width:      arrPageSizes[0],

                    height:     arrPageSizes[1]

                });

                // Get page scroll

                var arrPageScroll = ___getPageScroll();

                // Calculate top and left offset for the jquery-lightbox div object and show it

                $('#jquery-lightbox').css({

                    top:    arrPageScroll[1] + (arrPageSizes[3] / 10),

                    left:   arrPageScroll[0]

                });

            });

        }

        /**

         * Prepares image exibition; doing a imageīs preloader to calculate itīs size

         *

         */

        function _set_image_to_view() { // show the loading

            // Show the loading

            $('#lightbox-loading').show();

            if ( settings.fixedNavigation ) {

                $('#lightbox-image,#lightbox-container-image-data-box,#lightbox-image-details-currentNumber').hide();

            } else {

                // Hide some elements

                $('#lightbox-image,#lightbox-nav,#lightbox-nav-btnPrev,#lightbox-nav-btnNext,#lightbox-container-image-data-box,#lightbox-image-details-currentNumber').hide();

            }

            // Image preload process

            var objImagePreloader = new Image();

            objImagePreloader.onload = function() {

                $('#lightbox-image').attr('src',settings.imageArray[settings.activeImage][0]);

                // Perfomance an effect in the image container resizing it

                _resize_container_image_box(objImagePreloader.width,objImagePreloader.height);

                //  clear onLoad, IE behaves irratically with animated gifs otherwise

                objImagePreloader.onload=function(){};

            };

            objImagePreloader.src = settings.imageArray[settings.activeImage][0];

        };

        /**

         * Perfomance an effect in the image container resizing it

         *

         * @param integer intImageWidth The image´s width that will be showed

         * @param integer intImageHeight The image´s height that will be showed

         */

        function _resize_container_image_box(intImageWidth,intImageHeight) {

            // Get current width and height

            var intCurrentWidth = $('#lightbox-container-image-box').width();

            var intCurrentHeight = $('#lightbox-container-image-box').height();

            // Get the width and height of the selected image plus the padding

            var intWidth = (intImageWidth + (settings.containerBorderSize * 2)); // Plus the image´s width and the left and right padding value

            var intHeight = (intImageHeight + (settings.containerBorderSize * 2)); // Plus the image´s height and the left and right padding value

            // Diferences

            var intDiffW = intCurrentWidth - intWidth;

            var intDiffH = intCurrentHeight - intHeight;

            // Perfomance the effect

            $('#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-container-image-data-box').css({ width: intImageWidth });

            $('#lightbox-nav-btnPrev,#lightbox-nav-btnNext').css({ height: intImageHeight + (settings.containerBorderSize * 2) });

        };

        /**

         * Show the prepared image

         *

         */

        function _show_image() {

            $('#lightbox-loading').hide();

            $('#lightbox-image').fadeIn(function() {

                _show_image_data();

                _set_navigation();

            });

            _preload_neighbor_images();

        };

        /**

         * Show the image information

         *

         */

        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 we have a image set, display 'Image X of X'

            if ( settings.imageArray.length > 1 ) {

                $('#lightbox-image-details-currentNumber').html(settings.txtImage + ' ' + ( settings.activeImage + 1 ) + ' ' + settings.txtOf + ' ' + settings.imageArray.length).show();

            }       

        }

        /**

         * Display the button navigations

         *

         */

        function _set_navigation() {

            $('#lightbox-nav').show();

            // Instead to define this configuration in CSS file, we define here. And itīs need to IE. Just.

            $('#lightbox-nav-btnPrev,#lightbox-nav-btnNext').css({ 'background' : 'transparent url(' + settings.imageBlank + ') no-repeat' });

            // Show the prev button, if not the first image in set

            if ( settings.activeImage != 0 ) {

                if ( settings.fixedNavigation ) {

                    $('#lightbox-nav-btnPrev').css({ 'background' : 'url(' + settings.imageBtnPrev + ') left 15% no-repeat' })

                        .unbind()

                        .bind('click',function() {

                            settings.activeImage = settings.activeImage - 1;

                            _set_image_to_view();

                            return false;

                        });

                } else {

                    // Show the images button for Next buttons

                    $('#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;

                    });

                }

            }

            // Show the next button, if not the last image in set

            if ( settings.activeImage != ( settings.imageArray.length -1 ) ) {

                if ( settings.fixedNavigation ) {

                    $('#lightbox-nav-btnNext').css({ 'background' : 'url(' + settings.imageBtnNext + ') right 15% no-repeat' })

                        .unbind()

                        .bind('click',function() {

                            settings.activeImage = settings.activeImage + 1;

                            _set_image_to_view();

                            return false;

                        });

                } else {

                    // Show the images button for Next buttons

                    $('#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

            _enable_keyboard_navigation();

        }

        /**

         * Enable a support to keyboard navigation

         *

         */

        function _enable_keyboard_navigation() {

            $(document).keydown(function(objEvent) {

                _keyboard_action(objEvent);

            });

        }

        /**

         * Disable the support to keyboard navigation

         *

         */

        function _disable_keyboard_navigation() {

            $(document).unbind();

        }

        /**

         * Perform the keyboard actions

         *

         */

        function _keyboard_action(objEvent) {

            // To ie

            if ( objEvent == null ) {

                keycode = event.keyCode;

                escapeKey = 27;

            // To Mozilla

            } else {

                keycode = objEvent.keyCode;

                escapeKey = objEvent.DOM_VK_ESCAPE;

            }

            // Get the key in lower case form

            key = String.fromCharCode(keycode).toLowerCase();

            // Verify the keys to close the ligthBox

            if ( ( key == settings.keyToClose ) || ( key == 'x' ) || ( keycode == escapeKey ) ) {

                _finish();

            }

            // Verify the key to show the previous image

            if ( ( key == settings.keyToPrev ) || ( keycode == 37 ) ) {

                // If we´re not showing the first image, call the previous

                if ( settings.activeImage != 0 ) {

                    settings.activeImage = settings.activeImage - 1;

                    _set_image_to_view();

                    _disable_keyboard_navigation();

                }

            }

            // Verify the key to show the next image

            if ( ( key == settings.keyToNext ) || ( keycode == 39 ) ) {

                // If we´re not showing the last image, call the next

                if ( settings.activeImage != ( settings.imageArray.length - 1 ) ) {

                    settings.activeImage = settings.activeImage + 1;

                    _set_image_to_view();

                    _disable_keyboard_navigation();

                }

            }

        }

        /**

         * Preload prev and next images being showed

         *

         */

        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];

            }

        }

        /**

         * Remove jQuery lightBox plugin HTML markup

         *

         */

        function _finish() {

            $('#jquery-lightbox').remove();

            $('#jquery-overlay').fadeOut(function() { $('#jquery-overlay').remove(); });

            // Show some elements to avoid conflict with overlay in IE. These elements appear above the overlay.

            $('embed, object, select').css({ 'visibility' : 'visible' });

        }

        /**

         / THIRD FUNCTION

         * getPageSize() by quirksmode.com

         *

         * @return Array Return an array with page width, height and window width, height

         */

        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){ // all but Explorer Mac

                xScroll = document.body.scrollWidth;

                yScroll = document.body.scrollHeight;

            } else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari

                xScroll = document.body.offsetWidth;

                yScroll = document.body.offsetHeight;

            }

            var windowWidth, windowHeight;

            if (self.innerHeight) { // all except Explorer

                if(document.documentElement.clientWidth){

                    windowWidth = document.documentElement.clientWidth; 

                } else {

                    windowWidth = self.innerWidth;

                }

                windowHeight = self.innerHeight;

            } else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode

                windowWidth = document.documentElement.clientWidth;

                windowHeight = document.documentElement.clientHeight;

            } else if (document.body) { // other Explorers

                windowWidth = document.body.clientWidth;

                windowHeight = document.body.clientHeight;

            }   

            // for small pages with total height less then height of the viewport

            if(yScroll < windowHeight){

                pageHeight = windowHeight;

            } else { 

                pageHeight = yScroll;

            }

            // for small pages with total width less then width of the viewport

            if(xScroll < windowWidth){  

                pageWidth = xScroll;        

            } else {

                pageWidth = windowWidth;

            }

            arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight);

            return arrayPageSize;

        };

        /**

         / THIRD FUNCTION

         * getPageScroll() by quirksmode.com

         *

         * @return Array Return an array with x,y page scroll values.

         */

        function ___getPageScroll() {

            var xScroll, yScroll;

            if (self.pageYOffset) {

                yScroll = self.pageYOffset;

                xScroll = self.pageXOffset;

            } else if (document.documentElement && document.documentElement.scrollTop) {     // Explorer 6 Strict

                yScroll = document.documentElement.scrollTop;

                xScroll = document.documentElement.scrollLeft;

            } else if (document.body) {// all other Explorers

                yScroll = document.body.scrollTop;

                xScroll = document.body.scrollLeft; 

            }

            arrayPageScroll = new Array(xScroll,yScroll);

            return arrayPageScroll;

        };

         /**

          * Stop the code execution from a escified time in milisecond

          *

          */

         function ___pause(ms) {

            var date = new Date(); 

            curDate = null;

            do { var curDate = new Date(); }

            while ( curDate - date < ms);

         };

        // Return the jQuery object for chaining. The unbind method is used to avoid click conflict when the plugin is called more than once

        return this.unbind('click').click(_initialize);

    };

})(jQuery); // Call and execute the function immediately passing the jQuery object