/* Context Menu */
/*
 *  ContextMenu - jQuery plugin for right-click context menus
 *
 *  Author   :   Anand Kumar Sharma
 *  Date     :   20-10-2009
 *  Purpose  :   Display a right click context menu
 *
 */
(function($) 
{

 	var menu, shadow, trigger, content, hash, currentTarget;
    var defaults = 
    {
        menuStyle: 
        {
            listStyle: 'none',
            padding: '1px',
            margin: '0px',
            backgroundColor: '#fff',
            border: '1px solid #999',
            width: '150px'
        },
        itemStyle: 
        {
            margin: '0px',
            color: '#000',
            display: 'block',
            cursor: 'default',
            padding: '3px',
            border: '1px solid #fff',
            backgroundColor: 'transparent'
        },
        itemHoverStyle: 
        {
            border: '1px solid #0a246a',
            backgroundColor: '#b6bdd2'
        },
        eventPosX: 'pageX',
        eventPosY: 'pageY',
        shadow : true,
        onContextMenu: null,
        onShowMenu: null
 	};

  $.fn.contextMenu = function(id, options) 
  {
        if (!menu) 
        {                                      // Create singleton menu
            menu = $('<div id="jqContextMenu"></div>')
                    .hide()
                    .css({position:'absolute', zIndex:'500'})
                    .appendTo('body')
                    .bind('click', function(e) 
                    {
                        e.stopPropagation();
                    });
        }
        if (!shadow)
        {
            shadow = $('<div></div>')
                    .css({backgroundColor:'#000',position:'absolute',opacity:0.2,zIndex:499})
                    .appendTo('body')
                    .hide();
        }
        hash = hash || [];
        hash.push(
        {
            id : id,
            menuStyle: $.extend({}, defaults.menuStyle, options.menuStyle || {}),
            itemStyle: $.extend({}, defaults.itemStyle, options.itemStyle || {}),
            itemHoverStyle: $.extend({}, defaults.itemHoverStyle, options.itemHoverStyle || {}),
            bindings: options.bindings || {},
            shadow: options.shadow || options.shadow === false ? options.shadow : defaults.shadow,
            onContextMenu: options.onContextMenu || defaults.onContextMenu,
            onShowMenu: options.onShowMenu || defaults.onShowMenu,
            eventPosX: options.eventPosX || defaults.eventPosX,
            eventPosY: options.eventPosY || defaults.eventPosY
        });

        var index = hash.length - 1;
        $(this).bind('contextmenu', function(e) 
        {
            // Check if onContextMenu() defined
            e.preventDefault();
            var bShowContext = (!!hash[index].onContextMenu) ? hash[index].onContextMenu(e) : true;
            if (bShowContext) display(index, this, e, options);
            return false;
        });
        return this;
  };

  function display(index, trigger, e, options) 
  {
        var cur = hash[index];
        content = $('#'+cur.id).find('ul:first').clone(true);
        content.css(cur.menuStyle).find('li').css(cur.itemStyle).hover
        (
            function() 
            {
                $(this).css(cur.itemHoverStyle);
            },
            function()
            {
                $(this).css(cur.itemStyle);
            }
        ).find('img').css({verticalAlign:'middle',paddingRight:'2px'});

        // Send the content to the menu
        menu.html(content);

        // if there's an onShowMenu, run it now -- must run after content has been added
		// if you try to alter the content variable before the menu.html(), IE6 has issues
		// updating the content
        if (!!cur.onShowMenu) menu = cur.onShowMenu(e, menu);

        $.each(cur.bindings, function(id, func) 
        {
            $('#'+id, menu).bind('click', function(e) 
            {
                hide();
                func(trigger, currentTarget);
            });
        });

        menu.css({'left':e[cur.eventPosX],'top':e[cur.eventPosY]}).show();
        if (cur.shadow) shadow.css({width:menu.width(),height:menu.height(),left:e.pageX+2,top:e.pageY+2}).show();
        $(document).one('click', hide);
  }

  function hide() 
  {
        menu.hide();
        shadow.hide();
  }

  // Apply defaults
  $.contextMenu = 
  {
        defaults : function(userDefaults) 
        {
            $.each(userDefaults, function(i, val) 
            {
                if (typeof val == 'object' && defaults[i]) 
                {
                    $.extend(defaults[i], val);
                }
                else defaults[i] = val;
            });
        }
  };

})(jQuery);