Proyectos de Subversion Moodle

/*
 * 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,v 1.1.1.1 2009-03-17 18:35:18 kannan Exp $
 * 
 * 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 = "";
                                })
                                .mouseover(save)
                                .mouseout(hide)
                                .click(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);