/*
* Facebox (for jQuery)
* version: 1.2 (03/13/2008)
* @requires jQuery v1.2 or later
* Licensed under the MIT:
* http://www.opensource.org/licenses/mit-license.php
* Copyright 2007, 2008 Chris Wanstrath [ chris@ozmm.org ]
*/
(function($) {
  $.facebox = function(data, klass) {
    $.facebox.init()
    $.facebox.loading()
    $.isFunction(data) ? data.call() : $.facebox.reveal(data, klass)
  }
  $.facebox.settings = {
    loading_image : '/images/loading.gif',
    close_image : '/images/closelabel.gif',
    window_hash : '#fenster',
    image_types : [ 'png', 'jpg', 'jpeg', 'gif' ],
    facebox_html : '\
<div id="facebox" style="display:none;"> \
<div class="popup"> \
<table> \
<tbody> \
<tr> \
<td class="tl"/><td class="b"/><td class="tr"/> \
</tr> \
<tr> \
<td class="b"/> \
<td class="body"> \
<div class="content"> \
</div> \
<div class="footer"> \
<a href="#" class="close"> \
<img src="/images/closelabel.gif" title="Fenster schliessen" class="close_image" /> \
</a> \
</div> \
</td> \
<td class="b"/> \
</tr> \
<tr> \
<td class="bl"/><td class="b"/><td class="br"/> \
</tr> \
</tbody> \
</table> \
</div> \
</div>'
  }
  function back_button_observer() {
    if (window.location.hash != $.facebox.settings.window_hash) $(document).trigger('close.facebox')
  }
  function observe_back_button() {
    $.facebox.settings.old_hash = window.location.hash || '#'
    window.location.hash = $.facebox.settings.window_hash
    $.facebox.settings.back_button_observer = setInterval(back_button_observer, 200)
  }
  function stop_observing_back_button() {
    if (window.location.hash != $.facebox.settings.old_hash) window.location.hash = $.facebox.settings.old_hash
    $.facebox.settings.old_hash = null
    clearInterval($.facebox.settings.back_button_observer)
  }
  $.facebox.loading = function() {
    if ($('#facebox .loading').length == 1) return true
    observe_back_button()
    $('#facebox .content').empty()
    $('#facebox .body').children().hide().end().
      append('<div class=loading><img src="'+$.facebox.settings.loading_image+'"/></div>')
    var pageScroll = $.facebox.getPageScroll()
    $('#facebox').css({
      top:  pageScroll[1] + ($.facebox.getPageHeight() / 10),
      left:  pageScroll[0]
    }).show()
    $(document).bind('keydown.facebox', function(e) {
      if (e.keyCode == 27) $.facebox.close()
    })
    $('#facebox .close').click($.facebox.close)
  }
  $.facebox.reveal = function(data, klass) {
    if (klass) $('#facebox .content').addClass(klass)
    $('#facebox .content').append(data)
    $('#facebox .loading').remove()
    $('#facebox .body').children().fadeIn('normal')
  }
  $.facebox.close = function() {
    $(document).trigger('close.facebox')
    return false
  }
  $(document).bind('close.facebox', function() {
    stop_observing_back_button()
    $(document).unbind('keydown.facebox')
    $('#facebox').fadeOut(function() {
      $('#facebox .content').empty().removeClass().addClass('content')
    })
  })
  $.fn.facebox = function(settings) {
    $.facebox.init(settings)
    var image_types = $.facebox.settings.image_types.join('|')
    image_types = new RegExp('\.' + image_types + '$', 'i')
    function click_handler() {
      $.facebox.loading(true)
      var klass = this.rel.match(/facebox\[\.(\w+)\]/)
      if (klass) klass = klass[1]
      if (this.href.match(/#/)) {
        var url = window.location.href.split('#')[0]
        var target = this.href.replace(url,'')
        $.facebox.reveal($(target).clone().show(), klass)
      } else if (this.href.match(image_types)) {
        var image = new Image()
        image.onload = function() {
          $.facebox.reveal('<div class="image"><img src="' + image.src + '" /></div>', klass)
        }
        image.src = this.href
      } else {
        $.get(this.href, function(data) { $.facebox.reveal(data, klass) })
      }
      return false
    }
    return this.click(click_handler)
  }
  $.facebox.init = function(settings) {
    if ($.facebox.settings.inited) return true
    else $.facebox.settings.inited = true
    if (settings) $.extend($.facebox.settings, settings)
    $('body').append($.facebox.settings.facebox_html)
    var preload = [ new Image(), new Image() ]
    preload[0].src = $.facebox.settings.close_image
    preload[1].src = $.facebox.settings.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', $.facebox.settings.close_image)
  }
  $.facebox.getPageScroll = function() {
    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)
  }
  $.facebox.getPageHeight = function() {
    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
  }
})(jQuery);