/*
 * jdMenu 1.4.1 (2008-03-31)
 *
 * Copyright (c) 2006,2007 Jonathan Sharp (http://jdsharp.us)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://jdsharp.us/
 *
 * Built upon jQuery 1.2.1 (http://jquery.com)
 * This also requires the jQuery dimensions >= 1.2 plugin
 */

// This initializes the menu
$(function() {
  $('ul.jd_menu').jdMenu();
});

(function($){
  function addEvents(ul) {
    var settings = $.data( $(ul).parents().andSelf().filter('ul.jd_menu')[0], 'jdMenuSettings' );
    $('> li', ul)
      .bind('mouseenter.jdmenu mouseleave.jdmenu', function(evt) {
        $(this).toggleClass('jdm_hover');
        var ul = $('> ul', this);
        if ( ul.length == 1 ) {
          clearTimeout( this.$jdTimer );
          var enter = ( evt.type == 'mouseenter' );
          var fn = ( enter ? showMenu : hideMenu );
          this.$jdTimer = setTimeout(function() {
            fn( ul[0], settings.onAnimate, settings.isVertical );
          }, enter ? settings.showDelay : settings.hideDelay );
        }
      })
      .bind('click.jdmenu', function(evt) {
        var ul = $('> ul', this);
        if ( ul.length == 1 &&
          ( settings.disableLinks == true || $(this).hasClass('accessible') ) ) {
          showMenu( ul, settings.onAnimate, settings.isVertical );
          return false;
        }

        // The user clicked the li and we need to trigger a click for the a
        if ( evt.target == this ) {
          var link = $('> a', evt.target).not('.accessible');
          if ( link.length > 0 ) {
            var a = link[0];
            if ( !a.onclick ) {
              window.open( a.href, a.target || '_self' );
            } else {
              $(a).trigger('click');
            }
          }
        }
        if ( settings.disableLinks ||
          ( !settings.disableLinks && !$(this).parent().hasClass('jd_menu') ) ) {
          //$(this).parent().jdMenuHide();
          evt.stopPropagation();
        }
      })
      .find('> a')
        .bind('focus.jdmenu blur.jdmenu', function(evt) {
          var p = $(this).parents('li:eq(0)');
          if ( evt.type == 'focus' ) {
            p.addClass('jdm_hover');
          } else {
            p.removeClass('jdm_hover');
          }
        })
        .filter('.accessible')
          .bind('click.jdmenu', function(evt) {
            evt.preventDefault();
          });
  }

  function showMenu(ul, animate, vertical) {
    var ul = $(ul);
    if ( ul.is(':visible') ) {
      return;
    }
    ul.bgiframe();
    var li = ul.parent();
    ul  .trigger('jdMenuShow')
      .positionBy({   target:   li[0],
              targetPos:  ( vertical === true || !li.parent().hasClass('jd_menu') ? 1 : 3 ),
              elementPos: 0,
              hideAfterPosition: true
              });
    if ( !ul.hasClass('jdm_events') ) {
      ul.addClass('jdm_events');
      addEvents(ul);
    }
    li  .addClass('jdm_active')
      // Hide any adjacent menus
      .siblings('li').find('> ul:eq(0):visible')
        .each(function(){
          hideMenu( this );
        });
    if ( animate === undefined ) {
      ul.show();
    } else {
      animate.apply( ul[0], [true] );
    }
  }

  function hideMenu(ul, animate) {
    var ul = $(ul);
    $('.bgiframe', ul).remove();
    ul  .filter(':not(.jd_menu)')
      .find('> li > ul:eq(0):visible')
        .each(function() {
          hideMenu( this );
        })
      .end();
    if ( animate === undefined ) {
      ul.hide()
    } else {
      animate.apply( ul[0], [false] );
    }

    ul  .trigger('jdMenuHide')
      .parents('li:eq(0)')
        .removeClass('jdm_active jdm_hover')
      .end()
        .find('> li')
        .removeClass('jdm_active jdm_hover');
  }

  // Public methods
  $.fn.jdMenu = function(settings) {
    // Future settings: activateDelay
    var settings = $.extend({ // Time in ms before menu shows
                  showDelay:    200,
                  // Time in ms before menu hides
                  hideDelay:    500,
                  // Should items that contain submenus not
                  // respond to clicks
                  disableLinks: true
                  // This callback allows for you to animate menus
                  //onAnimate:  null
                  }, settings);
    if ( !$.isFunction( settings.onAnimate ) ) {
      settings.onAnimate = undefined;
    }
    return this.filter('ul.jd_menu').each(function() {
      $.data( this,
          'jdMenuSettings',
          $.extend({ isVertical: $(this).hasClass('jd_menu_vertical') }, settings)
          );
      addEvents(this);
    });
  };

  $.fn.jdMenuUnbind = function() {
    $('ul.jdm_events', this)
      .unbind('.jdmenu')
      .find('> a').unbind('.jdmenu');
  };
  $.fn.jdMenuHide = function() {
    return this.filter('ul').each(function(){
      hideMenu( this );
    });
  };

  // Private methods and logic
  $(window)
    // Bind a click event to hide all visible menus when the document is clicked
    .bind('click.jdmenu', function(){
      $('ul.jd_menu ul:visible').jdMenuHide();
    });
})(jQuery);