/*
 * 
 * version: 1.2 (05/05/2008)
 * @requires jQuery v1.2 or later
 *
 */
(function($) {
  $.RingMigOp = function(data, klass) {
    $.RingMigOp.loading()

    if (data.ajax) fillRingMigOpFromAjax(data.ajax, klass)
    else if (data.image) fillRingMigOpFromImage(data.image, klass)
    else if (data.div) fillRingMigOpFromHref(data.div, klass)
    else if ($.isFunction(data)) data.call($)
    else $.RingMigOp.reveal(data, klass)
  }

  /*
   * Public, $.RingMigOp methods
   */

  $.extend($.RingMigOp, {
    settings: {
      opacity      : 0,
      overlay      : true,
      loadingImage : '/images/loading.gif',
      closeImage   : '/images/luk.gif',
      imageTypes   : [ 'png', 'jpg', 'jpeg', 'gif' ],
      RingMigOpHtml  : '\
    <div id="RingMigOp" style="display:none;"> \
      <div class="popup"> \
        <table> \
          <tbody id="RingMigOp-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/luk.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 ($('#RingMigOp .loading').length == 1) return true
      showOverlay()

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

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

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

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

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

  /*
   * Public, $.fn methods
   */

  $.fn.RingMigOp = function(settings) {
    if ($(this).length == 0) return

    init(settings)

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

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

      fillRingMigOpFromHref(this.href, klass)
      return false
    }

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

  /*
   * Private methods
   */

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

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

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

    if (settings) $.extend($.RingMigOp.settings, settings)
    $('body').append($.RingMigOp.settings.RingMigOpHtml)

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

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

    $('#RingMigOp .close').click($.RingMigOp.close)
    $('#RingMigOp .close_image').attr('src', $.RingMigOp.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 = $.RingMigOp.settings

    $s.loadingImage = $s.loading_image || $s.loadingImage
    $s.closeImage = $s.close_image || $s.closeImage
    $s.imageTypes = $s.image_types || $s.imageTypes
    $s.RingMigOpHtml = $s.RingMigOp_html || $s.RingMigOpHtml
  }

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

    // image
    } else if (href.match($.RingMigOp.settings.imageTypesRegexp)) {
      fillRingMigOpFromImage(href, klass)
    // ajax
    } else {
      fillRingMigOpFromAjax(href, klass)
    }
  }

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

  function fillRingMigOpFromAjax(href, klass) {
    $.get(href, function(data) { $.RingMigOp.reveal(data, klass) })
  }

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

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

    if ($('#RingMigOp_overlay').length == 0)
      $("body").append('<div id="RingMigOp_overlay" class="RingMigOp_hide"></div>')

    $('#RingMigOp_overlay').hide().addClass("RingMigOp_overlayBG")
      .css('opacity', $.RingMigOp.settings.opacity)
      .click(function() { $(document).trigger('close.RingMigOp') })
      .fadeIn(200)
    return false
  }

  function hideOverlay() {
    if (skipOverlay()) return

    $('#RingMigOp_overlay').fadeOut(200, function(){
      $("#RingMigOp_overlay").removeClass("RingMigOp_overlayBG")
      $("#RingMigOp_overlay").addClass("RingMigOp_hide")
      $("#RingMigOp_overlay").remove()
    })

    return false
  }

  /*
   * Bindings
   */

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

})(jQuery);