/*
 * Facebox (for jQuery)
 * version: 1.2 (05/05/2008)
 * @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, 2008 Chris Wanstrath [ chris@ozmm.org ]
 *
 * Usage:
 *
 *  jQuery(document).ready(function() {
 *    jQuery('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')
 *    jQuery.facebox('some html', 'my-groovy-style')
 *
 *  The above will open a facebox with "some html" as the content.
 *
 *    jQuery.facebox(function($) {
 *      $.get('blah.html', function(data) { $.facebox(data) })
 *    })
 *
 *  The above will show a loading screen before the passed function is called,
 *  allowing for a better ajaxy experience.
 *
 *  The facebox function can also display an ajax page, an image, or the contents of a div:
 *
 *    jQuery.facebox({ ajax: 'remote.html' })
 *    jQuery.facebox({ ajax: 'remote.html' }, 'my-groovy-style')
 *    jQuery.facebox({ image: 'stairs.jpg' })
 *    jQuery.facebox({ image: 'stairs.jpg' }, 'my-groovy-style')
 *    jQuery.facebox({ div: '#box' })
 *    jQuery.facebox({ div: '#box' }, 'my-groovy-style')
 *
 *  Want to close the facebox?  Trigger the 'close.facebox' document event:
 *
 *    jQuery(document).trigger('close.facebox')
 *
 *  Facebox also has a bunch of other hooks:
 *
 *    loading.facebox
 *    beforeReveal.facebox
 *    reveal.facebox (aliased as 'afterReveal.facebox')
 *    init.facebox
 *    afterClose.facebox
 *
 *  Simply bind a function to any of these hooks:
 *
 *   $(document).bind('reveal.facebox', function() { ...stuff to do after the facebox and contents are revealed... })
 *
 */
(function($) {
  $.facebox = function(data, klass) {
    $.facebox.loading()

    if (data.ajax) {
      fillFaceboxFromAjax(data.ajax, klass);
    } else if (data.image) {
      fillFaceboxFromImage(data.image, klass);
    } else if (data.div) {
      fillFaceboxFromHref(data.div, klass);
    } else if ($.isFunction(data)) {
      data.call($);
    } else {
      $.facebox.reveal(data, klass);
    }
  }

  /*
   * Public, $.facebox methods
   */

  $.extend($.facebox, {
    settings: {
      opacity      : 0,
      overlay      : true,
      isModal      : true,
      loadingImage : 'loading.gif',
      closeImage   : 'closelabel.gif',
      imageTypes   : [ 'png', 'jpg', 'jpeg', 'gif' ],
      faceboxHtml  : '\
    <div id="facebox" style="display:none;"> \
      <div class="facebox_popup"> \
        <table> \
          <tbody id="facebox-tbody"> \
            <tr> \
              <td class="facebox_tl"/><td class="facebox_b"/><td class="facebox_tr"/> \
            </tr> \
            <tr> \
              <td class="facebox_b"/> \
              <td class="facebox_body"> \
                <div class="facebox_content"> \
                </div> \
                <div class="facebox_footer"> \
                  <a href="#" class="facebox_close"> \
                    <img src="closelabel.gif" title="close" class="facebox_close_image" /> \
                  </a> \
                </div> \
              </td> \
              <td class="facebox_b"/> \
            </tr> \
            <tr> \
              <td class="facebox_bl"/><td class="facebox_b"/><td class="facebox_br"/> \
            </tr> \
          </tbody> \
        </table> \
      </div> \
    </div>'
    },

    loading: function() {
      init();
      if ($('#facebox .loading').length == 1) {
        return true;
      }
      showOverlay();

      $('#facebox .facebox_content').empty();
      $('#facebox .facebox_body').children().hide().end().
        append('<div class="facebox_loading"><img src="'+$.facebox.settings.loadingImage+'"/></div>')

      $('#facebox').css({
        top:	getPageScroll()[1] + (getPageHeight() / 10),
        left:	$(window).width() / 2 - 205
      }).show();

      if(!$.facebox.settings.isModal) {
        $(document).bind('keydown.facebox', function(e) {
          if (e.keyCode == 27) {
            $.facebox.close();
            return true;
          }
        })
      }
      $(document).trigger('loading.facebox');
    },

    reveal: function(data, klass) {
      $(document).trigger('beforeReveal.facebox');
      if (klass) {
        $('#facebox .facebox_content').addClass(klass);
      }
      
      $('#facebox .facebox_content').append(data);
      $('#facebox .facebox_loading').remove();
      $('#facebox .facebox_body').children().fadeIn('normal');
      $('#facebox').css('left', $(window).width() / 2 - ($('#facebox table').width() / 2));
      $(document).trigger('reveal.facebox').trigger('afterReveal.facebox');
    },

    close: function() {
      $(document).trigger('close.facebox');
      return false;
    }
  })

  /*
   * Public, $.fn methods
   */

  $.fn.facebox = function(settings) {
    if ($(this).length == 0) {
      return;
    }

    init(settings);

    function clickHandler() {
      $.facebox.loading(true);

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

      fillFaceboxFromHref(this.href, klass);

      return false;
    }

    return this.bind('click.facebox', clickHandler)
  }

  /*
   * Private methods
   */

  // called one time to setup facebox on this page
  function init(settings) {
    if ($.facebox.settings.inited) {
      return true;
    } else {
      $.facebox.settings.inited = true;
    }

    $(document).trigger('init.facebox');

    var imageTypes = $.facebox.settings.imageTypes.join('|')
    $.facebox.settings.imageTypesRegexp = new RegExp('\.(' + imageTypes + ')$', 'i')

    if (settings) {
      $.extend($.facebox.settings, settings);
    }
    $('body').append($.facebox.settings.faceboxHtml)

    var preload = [ new Image(), new Image() ]
    preload[0].src = $.facebox.settings.closeImage;
    preload[1].src = $.facebox.settings.loadingImage;

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

    $('#facebox .facebox_close').click($.facebox.close);
    $('#facebox .facebox_close_image').attr('src', $.facebox.settings.closeImage);
  }

  // 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)
  }

  // Adapted 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
  }

  // Figures out what you want to display and displays it
  // formats are:
  //     div: #id
  //   image: blah.extension
  //    ajax: anything else
  function fillFaceboxFromHref(href, klass) {
    // div
    if (href.match(/#/)) {
      var url    = window.location.href.split('#')[0]
      var target = href.replace(url,'')
      if (target == '#') {
        return;
      }

      $.facebox.reveal($(target).html(), klass)

    // image
    } else if (href.match($.facebox.settings.imageTypesRegexp)) {
      fillFaceboxFromImage(href, klass)
    // ajax
    } else {
      fillFaceboxFromAjax(href, klass)
    }
  }

  function fillFaceboxFromImage(href, klass) {
    var image = new Image()
    image.onload = function() {
      $.facebox.reveal('<div class="facebox_image"><img src="' + image.src + '" /></div>', klass)
    }
    image.src = href
  }

  function fillFaceboxFromAjax(href, klass) {
    $.get(href, function(data) { $.facebox.reveal(data, klass) })
  }

  function skipOverlay() {
    return $.facebox.settings.overlay == false || $.facebox.settings.opacity === null
  }

  function showOverlay() {
    if (skipOverlay()) {
      return;
    }

    // add the overlay to the page if it isnt already there
    if ($('#facebox_overlay').length == 0) {
      $("body").append('<div id="facebox_overlay" class="facebox_hide"></div>');
    }

    $('#facebox_overlay').hide().addClass("facebox_overlayBG").css('opacity', $.facebox.settings.opacity);
    
    if(!$.facebox.settings.isModal) {
      $('#facebox_overlay').click(function() { $(document).trigger('close.facebox') }) // assign a click event function to the overlay that triggers the "close.facebox" event
    }
    
    $('#facebox_overlay').fadeIn(200);
    
    return false
  }

  function hideOverlay() {
    if (skipOverlay()) {
      return;
    }
    
    $('#facebox_overlay').fadeOut(200, function(){
      $("#facebox_overlay").removeClass("facebox_overlayBG")
      $("#facebox_overlay").addClass("facebox_hide")
      $("#facebox_overlay").remove()
    })

    return false
  }

  /*
   * Bindings
   */

  // Bind the "close.facebox" event to the given function
  $(document).bind('close.facebox', function() {
    $(document).unbind('keydown.facebox');
    
    $('#facebox').fadeOut(function() {
      $('#facebox .facebox_content').removeClass().addClass('facebox_content');
      hideOverlay();
      $('#facebox .loading').remove();
      $(document).trigger('afterClose.facebox');
    })
  })

})(jQuery);