/*
 * Facebox (for jQuery)
 * version: 1.1 (01/20/2007)
 * @requires jQuery v1.2 or later
 *
 * Examples at http://famspam.com/facebox/
 *
 * Licensed under the MIT:
 *   http://www.opensource.org/licenses/mit-license.php
 *
 * Copyright 2007 Chris Wanstrath { chris@ozmm.org }
 *
 * Usage:
 *  
 *  jQuery(document).ready(function($) {
 *    $('a[rel*=facebox]').facebox() 
 *  })
 *
 *  <a href="#terms" rel="facebox">Terms</a>
 *    Loads the #terms div in the box
 *
 *  <a href="terms.html" rel="facebox">Terms</a>
 *    Loads the terms.html page in the box
 *
 *  <a href="terms.png" rel="facebox">Terms</a>
 *    Loads the terms.png image in the box
 *
 *
 *  You can also use it programmatically:
 * 
 *    jQuery.facebox('some html')
 *
 *  This will open a facebox with "some html" as the content.
 *    
 *    jQuery.facebox(function($) { $.ajaxes() })
 *
 *  This will show a loading screen before the passed function is called,
 *  allowing for a better ajax experience.
 *
 */
(function($) {
    /**
     *  The static facebox() function, can be passed a string or
     *  function.
     *
     *  You can also use it programmatically:
     *
     *    jQuery.facebox('some html')
     *
     *  This will open a facebox with "some html" as the content.
     *
     *    jQuery.facebox(function($) { $.ajaxes() })
     *
     *  This will show a loading screen before the passed function is called,
     *  allowing for a better ajax experience.
     */
    $.facebox = function(data) {
        facebox_init()
        facebox_loading()
        $.isFunction(data) ? data.call(this, $) : facebox_reveal(data)
        return $
    }

    /**
     * Facebox settings, which can be modified through the facebox() method
     * or directly.
     *
     *    jQuery('a[rel*=facebox]').facebox({ loading_image: '/images/spinner.gif' })
     *
     *    jQuery.facebox.settings.loading_image = '/images/spinner.gif'
     */
    $.facebox.settings = {
        loading_image : '/js/images/loading.gif',
        close_image   : '/js/images/closelabel.gif',
        image_types   : [ 'png', 'jpg', 'jpeg', 'gif' ],
        next_image    : '/js/images/fast_forward.png',
        prev_image    : '/js/images/rewind.png',
        play_image    : '/js/images/play.png',
        pause_image   : '/js/images/pause.png',
        slide_duration: 6,
        facebox_html  : '\
  <div id="facebox" style="display:none;"> \
    <div class="popup"> \
      <table class=fb> \
        <tbody> \
          <tr> \
            <td class="tl"/><td class="b"/><td class="tr"/> \
          </tr> \
          <tr> \
            <td class="b"/> \
            <td class="body"> \
              <div class="content"> \
              </div> \
            </td> \
            <td class="b"/> \
          </tr> \
          <tr> \
            <td class="bl"/><td class="b"/><td class="br"/> \
          </tr> \
        </tbody> \
      </table> \
    </div> \
  </div>'
    }
    var $s = $.facebox.settings

    $.fn.facebox = function(settings) {
        facebox_init(settings)

        var image_types = $s.image_types.join('|')
        image_types = new RegExp('\.' + image_types + '$', 'i')

        // suck out the images
        var images = []
        $(this).each(function() {
            if (this.href.match(image_types) && $.inArray(this.href, images) == -1)
                images.push(this.href)
        })
        if (images.length == 1) images = null

        function click_handler() {
            if ($('#facebox .loading').length == 1) return false
            facebox_loading()

            // support for rel="facebox[.inline_popup]" syntax, to add a class
            var klass = this.rel.match(/facebox\[\.(\w+)\]/)
            if (klass) klass = klass[1]

            // div
            if (this.href.match(/#/)) {
                var url = window.location.href.split('#')[0]
                var target = this.href.replace(url, '')
                facebox_reveal($(target).clone().show(), klass)

                // image
            } else if (this.href.match(image_types)) {
                facebox_reveal_image(this.href, images, klass)

                // ajax
            } else {
                $.get(this.href, function(data) {
                    facebox_reveal(data, klass)
                })
            }

            return false
        }

        return this.click(click_handler)
    }

    /**
     * The init function is a one-time setup which preloads vital images
     * and other niceities.
     */
    function facebox_init(settings) {
        if ($s.inited && typeof settings == 'undefined')
            return true
        else
            $s.inited = true

        if (settings) $.extend($s, settings)

        $('body').append($s.facebox_html)

        var preload = [ new Image(), new Image() ]
        preload[0].src = $s.close_image
        preload[1].src = $s.loading_image

        $('#facebox').find('.b:first, .bl, .br, .tl, .tr').each(function() {
            preload.push(new Image())
            preload.slice(-1).src = $(this).css('background-image').replace(/url\((.+)\)/, '$1')
        })

        $('#facebox .close').click(facebox_close)
        $('#facebox .close_image').attr('src', $s.close_image)
    }

    /**
     * The loading function prepares the facebox by displaying it
     * in the proper spot, cleaning its contents, attaching keybindings
     * and showing the loading image.
     */
    function facebox_loading() {
        if ($('#facebox .loading').length == 1) return true

        $(document).unbind('.facebox')
        $('#facebox .content, #facebox .info, #facebox .navigation').empty()
        $('#facebox .body').children().hide().end().
                append('<div class="loading"><img src="' + $s.loading_image + '"/></div>')

        var pageScroll = getPageScroll()
        $('#facebox').css({
            top:    pageScroll[1] + 10,
            left:    pageScroll[0]
        }).show()

        $(document).bind('keydown.facebox', function(e) {
            if (e.keyCode == 27) facebox_close()
        })
    }

    /**
     * The facebox_reveal function sets the user-defined class (if any)
     * on the .content div, removes the loading image, and displays
     * the data.  If an extra_setup functino is provided, it will be run
     * right before the data is displayed but after it is added.
     */
    function facebox_reveal(data, klass, extra_setup) {
        $('#facebox .content').addClass(klass).append(data)
        $('#facebox .loading').remove()
        if ($.isFunction(extra_setup)) extra_setup.call(this)
        $('#facebox .body > *').fadeIn('normal')
    }

    /**
     * Used to load and show an image in the facebox.  Involved in the slideshow business.
     */
    function facebox_reveal_image(href, images, klass) {
        if (images) var extra_setup = facebox_setup_gallery(href, images, klass)
        var image = new Image()
        image.onload = function() {
            facebox_reveal('<div class="image"><img src="' + image.src + '" /></div>', klass, extra_setup)
            // load the next image in the background
            if (images) {
                var position = $.inArray(href, images)
                var next = new Image()
                next.src = images[position + 1] ? images[position + 1] : images[0]
            }
        }
        image.src = href
    }

    /**
     * Unbinds all listeners and closes the facebox.
     */
    function facebox_close() {
        facebox_stop_slideshow()
        $(document).unbind('.facebox')
        $('#facebox').fadeOut(function() {
            $('#facebox .content').removeClass().addClass('content')
        })
        return false
    }

    function facebox_setup_gallery(href, images, klass) {
        var position = $.inArray(href, images)

        var jump = function(where) {
            facebox_loading()
            if (where >= images.length) where = 0
            if (where < 0) where = images.length - 1
            facebox_reveal_image(images[where], images, klass)
        }

        return function() {
            $('#facebox .image').click(
                    function() {
                        jump(position + 1)
                    }).css('cursor', 'pointer')
            $('#facebox .info').append('Изображение ' + (position + 1) + ' из ' + images.length)
            $('#facebox .navigation').
                    append('<img class="prev" src="/js/images/rewind.png"/>' +
                    '<img class="play" src="' + ($s.playing ? "/js/images/pause.png" : "/js/images/play.png") + '"/>' +
                    '<img class="next" src="/js/images/fast_forward.png"/>').
                    find('img').css('cursor', 'pointer').end().
                    find('.prev').click(
                    function() {
                        jump(position - 1);
                        return false
                    }).end().
                    find('.next').click(
                    function() {
                        jump(position + 1);
                        return false
                    }).end()

            $('#facebox .play').bind('click.facebox', function() {
                $s.playing ? facebox_stop_slideshow() : facebox_start_slideshow()
                return false
            })

            $(document).bind('keydown.facebox', function(e) {
                if (e.keyCode == 39) jump(position + 1) // right
                if (e.keyCode == 37) jump(position - 1) // left
            })
        }
    }

    function facebox_start_slideshow() {
        $('#facebox .play').attr('src', "/js/images/pause.png")
        $s.playing = setInterval(function() {
            $('#facebox .next').click()
        }, $s.slide_duration * 1000)
    }

    function facebox_stop_slideshow() {
        $('#facebox .play').attr('src', "/js/images/play.png")
        clearInterval($s.playing)
        $s.playing = false
    }

    // getPageScroll() by quirksmode.com
    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;
        }
        return new Array(xScroll, yScroll)
    }

    // adapter from getPageSize() by quirksmode.com
    function getPageHeight() {
        var windowHeight
        if (self.innerHeight) {    // all except Explorer
            windowHeight = self.innerHeight;
        } else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
            windowHeight = document.documentElement.clientHeight;
        } else if (document.body) { // other Explorers
            windowHeight = document.body.clientHeight;
        }
        return windowHeight
    }

    $(document).ready(function() {

        // lightbox activation
        if ($.facebox)
            $('a[rel*=facebox]').facebox({
                next_image    : 'images/fast_forward.png',
                play_image    : 'images/play.png',
                pause_image   : 'images/pause.png',
                prev_image    : 'images/rewind.png'
            })
    });
})(jQuery);