/*
 * jQuery Tooltip plugin 1.3
 *
 * http://bassistance.de/jquery-plugins/jquery-plugin-tooltip/
 * http://docs.jquery.com/Plugins/Tooltip
 *
 * Copyright (c) 2006 - 2008 Jörn Zaefferer
 *
 * $Id: jquery.tooltip.js 5741 2008-06-21 15:22:16Z joern.zaefferer $
 * 
 * Dual licensed under the MIT and GPL licenses:
 *   http://www.opensource.org/licenses/mit-license.php
 *   http://www.gnu.org/licenses/gpl.html
 */
 
;(function($) {
    
	// the tooltip element
    var helper = {},
	// the current tooltipped element
	current,
	// the title of the current element, used for restoring
	title,
	// timeout id for delayed tooltips
	tID,
	// IE 5.5 or 6
	IE = $.browser.msie && /MSIE\s(5\.5|6\.)/.test(navigator.userAgent),
	// flag for mouse tracking
	track = false;
    
    $.tooltip = {
	blocked: false,
	defaults: {
	    delay: 200,
	    fade: false,
	    showURL: true,
	    extraClass: "",
	    top: 15,
	    left: 15,
	    id: "tooltip"
	},
	block: function() {
	    $.tooltip.blocked = !$.tooltip.blocked;
	}
    };
    
    $.fn.extend({
	tooltip: function(settings) {
	    settings = $.extend({}, $.tooltip.defaults, settings);
	    createHelper(settings);
	    return this.each(function() {
		    $.data(this, "tooltip", settings);
		    this.tOpacity = helper.parent.css("opacity");
		    // copy tooltip into its own expando and remove the title
		    this.tooltipText = this.title;
		    $(this).removeAttr("title");
		    // also remove alt attribute to prevent default tooltip in IE
		    this.alt = "";
		})
		.click(save)
		.mouseout(hide)
		
	},
	fixPNG: IE ? function() {
	    return this.each(function () {
		var image = $(this).css('backgroundImage');
		if (image.match(/^url\(["']?(.*\.png)["']?\)$/i)) {
		    image = RegExp.$1;
		    $(this).css({
			'backgroundImage': 'none',
			'filter': "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=crop, src='" + image + "')"
		    }).each(function () {
			var position = $(this).css('position');
			if (position != 'absolute' && position != 'relative')
			    $(this).css('position', 'relative');
		    });
		}
	    });
	} : function() { return this; },
	unfixPNG: IE ? function() {
	    return this.each(function () {
		$(this).css({'filter': '', backgroundImage: ''});
	    });
	} : function() { return this; },
	hideWhenEmpty: function() {
	    return this.each(function() {
		$(this)[ $(this).html() ? "show" : "hide" ]();
	    });
	},
	url: function() {
	    return this.attr('href') || this.attr('src');
	}
    });
    
    function createHelper(settings) {
	// there can be only one tooltip helper
	if( helper.parent )
	    return;
	// create the helper, h3 for title, div for url
	helper.parent = $('<div id="' + settings.id + '"><h3></h3><div class="body"></div><div class="url"></div></div>')
	    // add to document
	    .appendTo(document.body)
	    // hide it at first
	    .hide();
	    
	// apply bgiframe if available
	if ( $.fn.bgiframe )
	    helper.parent.bgiframe();
	
	// save references to title and url elements
	helper.title = $('h3', helper.parent);
	helper.body = $('div.body', helper.parent);
	helper.url = $('div.url', helper.parent);
    }
    
    function settings(element) {
	return $.data(element, "tooltip");
    }
    
    // main event handler to start showing tooltips
    function handle(event) {
	// show helper, either with timeout or on instant
	if( settings(this).delay )
	    tID = setTimeout(show, settings(this).delay);
	else
	    show();
	
	// if selected, update the helper position when the mouse moves
	track = !!settings(this).track;
	$(document.body).bind('mousemove', update);
	    
	// update at least once
	update(event);
    }
    
    // save elements title before the tooltip is displayed
    function save() {
	// if this is the current source, or it has no title (occurs with click event), stop
	if ( $.tooltip.blocked || this == current || (!this.tooltipText && !settings(this).bodyHandler) )
	    return;

	// save current
	current = this;
	title = this.tooltipText;
	
	if ( settings(this).bodyHandler ) {
	    helper.title.hide();
	    var bodyContent = settings(this).bodyHandler.call(this);
	    if (bodyContent.nodeType || bodyContent.jquery) {
		helper.body.empty().append(bodyContent)
	    } else {
		helper.body.html( bodyContent );
	    }
	    helper.body.show();
	} else if ( settings(this).showBody ) {
	    var parts = title.split(settings(this).showBody);
	    helper.title.html(parts.shift()).show();
	    helper.body.empty();
	    for(var i = 0, part; (part = parts[i]); i++) {
		if(i > 0)
		    helper.body.append("<br/>");
		helper.body.append(part);
	    }
	    helper.body.hideWhenEmpty();
	} else {
	    helper.title.html(title).show();
	    helper.body.hide();
	}
	
	// if element has href or src, add and show it, otherwise hide it
	if( settings(this).showURL && $(this).url() )
	    helper.url.html( $(this).url().replace('http://', '') ).show();
	else 
	    helper.url.hide();
	
	// add an optional class for this tip
	helper.parent.addClass(settings(this).extraClass);

	// fix PNG background for IE
	if (settings(this).fixPNG )
	    helper.parent.fixPNG();
	    
	handle.apply(this, arguments);
    }
    
    // delete timeout and show helper
    function show() {
	tID = null;
	if ((!IE || !$.fn.bgiframe) && settings(current).fade) {
	    if (helper.parent.is(":animated"))
		helper.parent.stop().show().fadeTo(settings(current).fade, current.tOpacity);
	    else
		helper.parent.is(':visible') ? helper.parent.fadeTo(settings(current).fade, current.tOpacity) : helper.parent.fadeIn(settings(current).fade);
	} else {
	    helper.parent.show();
	}
	update();
    }
    
    /**
     * callback for mousemove
     * updates the helper position
     * removes itself when no current element
     */
    function update(event)	{
	if($.tooltip.blocked)
	    return;
	
	if (event && event.target.tagName == "OPTION") {
	    return;
	}
	
	// stop updating when tracking is disabled and the tooltip is visible
	if ( !track && helper.parent.is(":visible")) {
	    $(document.body).unbind('mousemove', update)
	}
	
	// if no current element is available, remove this listener
	if( current == null ) {
	    $(document.body).unbind('mousemove', update);
	    return;	
	}
	
	// remove position helper classes
	helper.parent.removeClass("viewport-right").removeClass("viewport-bottom");
	
	var left = helper.parent[0].offsetLeft;
	var top = helper.parent[0].offsetTop;
	if (event) {
	    // position the helper 15 pixel to bottom right, starting from mouse position
	    left = event.pageX + settings(current).left;
	    top = event.pageY + settings(current).top;
	    var right='auto';
	    if (settings(current).positionLeft) {
		right = $(window).width() - left;
		left = 'auto';
	    }
	    helper.parent.css({
		left: left,
		right: right,
		top: top
	    });
	}
	
	var v = viewport(),
	    h = helper.parent[0];
	// check horizontal position
	if (v.x + v.cx < h.offsetLeft + h.offsetWidth) {
	    left -= h.offsetWidth + 20 + settings(current).left;
	    helper.parent.css({left: left + 'px'}).addClass("viewport-right");
	}
	// check vertical position
	if (v.y + v.cy < h.offsetTop + h.offsetHeight) {
	    top -= h.offsetHeight + 20 + settings(current).top;
	    helper.parent.css({top: top + 'px'}).addClass("viewport-bottom");
	}
    }
    
    function viewport() {
	return {
	    x: $(window).scrollLeft(),
	    y: $(window).scrollTop(),
	    cx: $(window).width(),
	    cy: $(window).height()
	};
    }
    
    // hide helper and restore added classes and the title
    function hide(event) {
	if($.tooltip.blocked)
	    return;
	// clear timeout if possible
	if(tID)
	    clearTimeout(tID);
	// no more current element
	current = null;
	
	var tsettings = settings(this);
	function complete() {
	    helper.parent.removeClass( tsettings.extraClass ).hide().css("opacity", "");
	}
	if ((!IE || !$.fn.bgiframe) && tsettings.fade) {
	    if (helper.parent.is(':animated'))
		helper.parent.stop().fadeTo(tsettings.fade, 0, complete);
	    else
		helper.parent.stop().fadeOut(tsettings.fade, complete);
	} else
	    complete();
	
	if( settings(this).fixPNG )
	    helper.parent.unfixPNG();
    }
    
})(jQuery);