/*
 * Shadowbox
 * 
 * @description	jQuery based plugin to pretty load & view remote or local content
 * 							in Lightbox-styled "window"
 * @version: 1.0 (2008-11-13)
 * @link 	flexaspect.com
 * 
 * @requires jQuery library >= v1.2.6
 *
 * How to use:
 *  
 *  jQuery(document).ready(function() {
 *    jQuery('a[rel*=_name_of_rel_]').shadowbox() 
 *  })
 *	where '_name_of_rel_' for your flawor (as ex., name it 'shadowbox')
 *
 *	Examples:
 *  <a href="#localDom" rel="shadowbox">Local 'display:none' styled div with some info</a>
 *    Load & display the DOM-element with id="localDom" in the shadowbox (as ex., div)
 *
 *  <a href="remote_content.html" rel="shadowbox">Use AJAX power</a>
 *    Load & display remote_content.html page in the shadowbox.
 *    Also be sure, that other extensions for page (e.g. 'php|txt|shtml') are allowed.
 *    If remote content is scenario (like showdate.php), script will be processed as usually & result displayed.
 *
 *  <a href="giraffe.gif" rel="shadowbox">Crazy zoo</a>
 *    Load & display ordinary picture (as ex., the giraffe.gif) in the box.
 *    Be informed, that allowed extensions is  'png', 'jpg', 'jpeg', 'gif' by default
 *
 */
(function($) {
  $.shadowbox = function(data, klass) {
    $.shadowbox.loading()

    if (data.ajax) fillShadowboxFromAjax(data.ajax)
    else if (data.image) fillShadowboxFromImage(data.image)
    else if (data.div) fillShadowboxFromHref(data.div)
    else if ($.isFunction(data)) data.call($)
    else $.shadowbox.reveal(data, klass)
  }

  /*
   * Public, $.shadowbox methods
   */

  $.extend($.shadowbox, {
    settings: {
      opacity      : 0.75,
      overlay      : true,
      fadein      	: 200,
      fadeout		: 200,
      loadingImage : './loading.gif',
      closeImage   : './closelabel.gif',
      imageTypes   : [ 'png', 'jpg', 'jpeg', 'gif' ],
      shadowboxHtml  : '\
    <div id="shadowbox" 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="/library/closelabel.gif" title="close" 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>'
    },

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

      $('#shadowbox .content').empty()
      $('#shadowbox .body').children().hide().end().
        append('<div class="loading"><img src="'+$.shadowbox.settings.loadingImage+'"/></div>')

      $('#shadowbox').css({
        top:	getPageScroll()[1] + (getPageHeight() / 10),
        left:	385.5
      }).show()

      $(document).bind('keydown.shadowbox', function(e) {
        if (e.keyCode == 27) $.shadowbox.close()
        return true
      })
      $(document).trigger('loading.shadowbox')
    },

    reveal: function(data, klass) {
      $(document).trigger('beforeReveal.shadowbox')
      if (klass) $('#shadowbox .content').addClass(klass)
      $('#shadowbox .content').append(data)
      $('#shadowbox .loading').remove()
      $('#shadowbox .body').children().fadeIn('normal')
      $('#shadowbox').css('left', $(window).width() / 2 - ($('#shadowbox table').width() / 2))
      $(document).trigger('reveal.shadowbox').trigger('afterReveal.shadowbox')
    },

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

  /*
   * Public, $.fn methods
   */

  $.fn.shadowbox = function(settings) {
    init(settings)

    function clickHandler() {
      $.shadowbox.loading(true)

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

      fillShadowboxFromHref(this.href, klass)
      return false
    }

    return this.click(clickHandler)
  }

  /*
   * Private methods
   */

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

    $(document).trigger('init.shadowbox')
    makeCompatible()

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

    if (settings) $.extend($.shadowbox.settings, settings)
    $('body').append($.shadowbox.settings.shadowboxHtml)

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

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

    $('#shadowbox .close').click($.shadowbox.close)
    $('#shadowbox .close_image').attr('src', $.shadowbox.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
  }

  // Backwards compatibility
  function makeCompatible() {
    var $s = $.shadowbox.settings

    $s.loadingImage = $s.loading_image || $s.loadingImage
    $s.closeImage = $s.close_image || $s.closeImage
    $s.imageTypes = $s.image_types || $s.imageTypes
    $s.shadowboxHtml = $s.shadowbox_html || $s.shadowboxHtml
    
    $s.opacity = $s.shadowbox_opacity || $s.opacity
    $s.overlay = $s.shadowbox_overlay || $s.overlay
    
    $s.fadein = $s.shadowbox_fadein || $s.fadein
    $s.fadeout = $s.shadowbox_fadeout || $s.fadeout
  }

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

    // image
    } else if (href.match($.shadowbox.settings.imageTypesRegexp)) {
      fillShadowboxFromImage(href, klass)
    // ajax
    } else {
      fillShadowboxFromAjax(href, klass)
    }
  }

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

  function fillShadowboxFromAjax(href, klass) {
    $.get(href, function(data) { $.shadowbox.reveal(data, klass) })
  }

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

  function showOverlay() {
      var fadeinspeed = $.shadowbox.settings.fadein * 1
      
    if (skipOverlay()) return

    if ($('shadowbox_overlay').length == 0) 
      $("body").append('<div id="shadowbox_overlay" class="shadowbox_hide"></div>')
	      
    $('#shadowbox_overlay').hide().addClass("shadowbox_overlayBG")
      .css('opacity', $.shadowbox.settings.opacity)
      .click(function() { $(document).trigger('close.shadowbox') })
      .fadeIn(fadeinspeed)
    return false
  }

  function hideOverlay() {
    var fadeoutspeed = $.shadowbox.settings.fadeout * 1
    
    if (skipOverlay()) return
    $('#shadowbox_overlay').fadeOut(fadeoutspeed, function(){
      $("#shadowbox_overlay").removeClass("shadowbox_overlayBG")
      $("#shadowbox_overlay").addClass("shadowbox_hide") 
      $("#shadowbox_overlay").remove()
    })
    
    return false
  }

  /*
   * Bindings
   */

  $(document).bind('close.shadowbox', function() {
    $(document).unbind('keydown.shadowbox')
    $('#shadowbox').fadeOut(function() {
      $('#shadowbox .content').removeClass().addClass('content')
      hideOverlay()
      $('#shadowbox .loading').remove()
    })
  })

})(jQuery);