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+// tipsy, facebook style tooltips for jquery
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+// version 1.0.0a
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+// (c) 2008-2010 jason frame [jason@onehackoranother.com]
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+// released under the MIT license
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+
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+(function($) {
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+
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+ function maybeCall(thing, ctx) {
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+ return (typeof thing == 'function') ? (thing.call(ctx)) : thing;
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+ };
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+
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+ function isElementInDOM(ele) {
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+ while (ele = ele.parentNode) {
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+ if (ele == document) return true;
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+ }
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+ return false;
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+ };
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+
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+ function Tipsy(element, options) {
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+ this.$element = $(element);
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+ this.options = options;
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+ this.enabled = true;
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+ this.fixTitle();
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+ };
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+
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+ Tipsy.prototype = {
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+ show: function() {
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+ var title = this.getTitle();
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+ if (title && this.enabled) {
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+ var $tip = this.tip();
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+
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+ $tip.find('.tipsy-inner')[this.options.html ? 'html' : 'text'](title);
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+ $tip[0].className = 'tipsy'; // reset classname in case of dynamic gravity
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+ $tip.remove().css({top: 0, left: 0, visibility: 'hidden', display: 'block'}).prependTo(document.body);
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+
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+ var pos = $.extend({}, this.$element.offset(), {
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+ width: this.$element[0].offsetWidth,
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+ height: this.$element[0].offsetHeight
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+ });
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+
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+ var actualWidth = $tip[0].offsetWidth,
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+ actualHeight = $tip[0].offsetHeight,
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+ gravity = maybeCall(this.options.gravity, this.$element[0]);
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+
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+ var tp;
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+ switch (gravity.charAt(0)) {
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+ case 'n':
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+ tp = {top: pos.top + pos.height + this.options.offset, left: pos.left + pos.width / 2 - actualWidth / 2};
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+ break;
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+ case 's':
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+ tp = {top: pos.top - actualHeight - this.options.offset, left: pos.left + pos.width / 2 - actualWidth / 2};
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+ break;
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+ case 'e':
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+ tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth - this.options.offset};
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+ // XXX HACK: i want to set another offset so apparently I have to hardcode this into the code. obviously.
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+ tp = {top: pos.top + pos.height / 2 - actualHeight / 2 + this.options.offset, left: pos.left - actualWidth};
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+ break;
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+ case 'w':
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+ tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left + pos.width + this.options.offset};
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+ break;
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+ }
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+
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+ if (gravity.length == 2) {
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+ if (gravity.charAt(1) == 'w') {
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+ tp.left = pos.left + pos.width / 2 - 15;
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+ } else {
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+ tp.left = pos.left + pos.width / 2 - actualWidth + 15;
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+ }
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+ }
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+
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+ $tip.css(tp).addClass('tipsy-' + gravity);
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+ $tip.find('.tipsy-arrow')[0].className = 'tipsy-arrow tipsy-arrow-' + gravity.charAt(0);
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+ if (this.options.className) {
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+ $tip.addClass(maybeCall(this.options.className, this.$element[0]));
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+ }
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+
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+ if (this.options.fade) {
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+ $tip.stop().css({opacity: 0, display: 'block', visibility: 'visible'}).animate({opacity: this.options.opacity});
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+ } else {
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+ $tip.css({visibility: 'visible', opacity: this.options.opacity});
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+ }
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+ }
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+ },
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+
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+ hide: function() {
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+ if (this.options.fade) {
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+ this.tip().stop().fadeOut(function() { $(this).remove(); });
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+ } else {
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+ this.tip().remove();
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+ }
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+ },
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+
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+ fixTitle: function() {
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+ var $e = this.$element;
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+ if ($e.attr('title') || typeof($e.attr('original-title')) != 'string') {
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+ $e.attr('original-title', $e.attr('title') || '').removeAttr('title');
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+ }
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+ },
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+
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+ getTitle: function() {
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+ var title, $e = this.$element, o = this.options;
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+ this.fixTitle();
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+ var title, o = this.options;
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+ if (typeof o.title == 'string') {
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+ title = $e.attr(o.title == 'title' ? 'original-title' : o.title);
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+ } else if (typeof o.title == 'function') {
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+ title = o.title.call($e[0]);
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+ }
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+ title = ('' + title).replace(/(^\s*|\s*$)/, "");
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+ return title || o.fallback;
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+ },
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+
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+ tip: function() {
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+ if (!this.$tip) {
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+ this.$tip = $('<div class="tipsy"></div>').html('<div class="tipsy-arrow"></div><div class="tipsy-inner"></div>');
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+ this.$tip.data('tipsy-pointee', this.$element[0]);
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+ }
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+ return this.$tip;
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+ },
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+
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+ validate: function() {
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+ if (!this.$element[0].parentNode) {
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+ this.hide();
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+ this.$element = null;
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+ this.options = null;
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+ }
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+ },
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+
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+ enable: function() { this.enabled = true; },
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+ disable: function() { this.enabled = false; },
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+ toggleEnabled: function() { this.enabled = !this.enabled; }
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+ };
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+
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+ $.fn.tipsy = function(options) {
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+
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+ if (options === true) {
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+ return this.data('tipsy');
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+ } else if (typeof options == 'string') {
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+ var tipsy = this.data('tipsy');
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+ if (tipsy) tipsy[options]();
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+ return this;
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+ }
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+
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+ options = $.extend({}, $.fn.tipsy.defaults, options);
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+
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+ function get(ele) {
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+ var tipsy = $.data(ele, 'tipsy');
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+ if (!tipsy) {
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+ tipsy = new Tipsy(ele, $.fn.tipsy.elementOptions(ele, options));
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+ $.data(ele, 'tipsy', tipsy);
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+ }
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+ return tipsy;
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+ }
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+
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+ function enter() {
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+ var tipsy = get(this);
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+ tipsy.hoverState = 'in';
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+ if (options.delayIn == 0) {
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+ tipsy.show();
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+ } else {
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+ tipsy.fixTitle();
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+ setTimeout(function() { if (tipsy.hoverState == 'in') tipsy.show(); }, options.delayIn);
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+ }
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+ };
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+
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+ function leave() {
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+ var tipsy = get(this);
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+ tipsy.hoverState = 'out';
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+ if (options.delayOut == 0) {
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+ tipsy.hide();
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+ } else {
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+ setTimeout(function() { if (tipsy.hoverState == 'out') tipsy.hide(); }, options.delayOut);
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+ }
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+ };
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+
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+ if (!options.live) this.each(function() { get(this); });
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+
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+ if (options.trigger != 'manual') {
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+ var binder = options.live ? 'live' : 'bind',
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+ eventIn = options.trigger == 'hover' ? 'mouseenter' : 'focus',
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+ eventOut = options.trigger == 'hover' ? 'mouseleave' : 'blur';
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+ this[binder](eventIn, enter)[binder](eventOut, leave);
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+ }
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+
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+ return this;
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+
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+ };
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+
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+ $.fn.tipsy.defaults = {
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+ className: null,
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+ delayIn: 0,
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+ delayOut: 0,
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+ fade: false,
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+ fallback: '',
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+ gravity: 'n',
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+ html: false,
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+ live: false,
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+ offset: 0,
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+ opacity: 0.8,
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+ title: 'title',
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+ trigger: 'hover'
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+ };
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+
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+ $.fn.tipsy.revalidate = function() {
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+ $('.tipsy').each(function() {
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+ var pointee = $.data(this, 'tipsy-pointee');
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+ if (!pointee || !isElementInDOM(pointee)) {
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+ $(this).remove();
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+ }
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+ });
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+ };
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+
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+ // Overwrite this method to provide options on a per-element basis.
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+ // For example, you could store the gravity in a 'tipsy-gravity' attribute:
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+ // return $.extend({}, options, {gravity: $(ele).attr('tipsy-gravity') || 'n' });
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+ // (remember - do not modify 'options' in place!)
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+ $.fn.tipsy.elementOptions = function(ele, options) {
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+ return $.metadata ? $.extend({}, options, $(ele).metadata()) : options;
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+ };
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+
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+ $.fn.tipsy.autoNS = function() {
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+ return $(this).offset().top > ($(document).scrollTop() + $(window).height() / 2) ? 's' : 'n';
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+ };
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+
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+ $.fn.tipsy.autoWE = function() {
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+ return $(this).offset().left > ($(document).scrollLeft() + $(window).width() / 2) ? 'e' : 'w';
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+ };
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+
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+ /**
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+ * yields a closure of the supplied parameters, producing a function that takes
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+ * no arguments and is suitable for use as an autogravity function like so:
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+ *
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+ * @param margin (int) - distance from the viewable region edge that an
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+ * element should be before setting its tooltip's gravity to be away
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+ * from that edge.
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+ * @param prefer (string, e.g. 'n', 'sw', 'w') - the direction to prefer
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+ * if there are no viewable region edges effecting the tooltip's
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+ * gravity. It will try to vary from this minimally, for example,
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+ * if 'sw' is preferred and an element is near the right viewable
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+ * region edge, but not the top edge, it will set the gravity for
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+ * that element's tooltip to be 'se', preserving the southern
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+ * component.
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+ */
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+ $.fn.tipsy.autoBounds = function(margin, prefer) {
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+ return function() {
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+ var dir = {ns: prefer[0], ew: (prefer.length > 1 ? prefer[1] : false)},
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+ boundTop = $(document).scrollTop() + margin,
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+ boundLeft = $(document).scrollLeft() + margin,
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+ $this = $(this);
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+
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+ if ($this.offset().top < boundTop) dir.ns = 'n';
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+ if ($this.offset().left < boundLeft) dir.ew = 'w';
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+ if ($(window).width() + $(document).scrollLeft() - $this.offset().left < margin) dir.ew = 'e';
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+ if ($(window).height() + $(document).scrollTop() - $this.offset().top < margin) dir.ns = 's';
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+
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+ return dir.ns + (dir.ew ? dir.ew : '');
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+ }
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+ };
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+
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+})(jQuery);
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