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| 1 | +// tipsy, facebook style tooltips for jquery |
| 2 | +// version 1.0.0a |
| 3 | +// (c) 2008-2010 jason frame [jason@onehackoranother.com] |
| 4 | +// released under the MIT license |
| 5 | + |
| 6 | +(function($) { |
| 7 | + |
| 8 | + function maybeCall(thing, ctx) { |
| 9 | + return (typeof thing == 'function') ? (thing.call(ctx)) : thing; |
| 10 | + }; |
| 11 | + |
| 12 | + function Tipsy(element, options) { |
| 13 | + this.$element = $(element); |
| 14 | + this.options = options; |
| 15 | + this.enabled = true; |
| 16 | + this.fixTitle(); |
| 17 | + }; |
| 18 | + |
| 19 | + Tipsy.prototype = { |
| 20 | + show: function() { |
| 21 | + var title = this.getTitle(); |
| 22 | + if (title && this.enabled) { |
| 23 | + var $tip = this.tip(); |
| 24 | + |
| 25 | + $tip.find('.tipsy-inner')[this.options.html ? 'html' : 'text'](title); |
| 26 | + $tip[0].className = 'tipsy'; // reset classname in case of dynamic gravity |
| 27 | + $tip.remove().css({top: 0, left: 0, visibility: 'hidden', display: 'block'}).prependTo(document.body); |
| 28 | + |
| 29 | + var pos = $.extend({}, this.$element.offset(), { |
| 30 | + width: this.$element[0].offsetWidth, |
| 31 | + height: this.$element[0].offsetHeight |
| 32 | + }); |
| 33 | + |
| 34 | + var actualWidth = $tip[0].offsetWidth, |
| 35 | + actualHeight = $tip[0].offsetHeight, |
| 36 | + gravity = maybeCall(this.options.gravity, this.$element[0]); |
| 37 | + |
| 38 | + var tp; |
| 39 | + switch (gravity.charAt(0)) { |
| 40 | + case 'n': |
| 41 | + tp = {top: pos.top + pos.height + this.options.offset, left: pos.left + pos.width / 2 - actualWidth / 2}; |
| 42 | + break; |
| 43 | + case 's': |
| 44 | + tp = {top: pos.top - actualHeight - this.options.offset, left: pos.left + pos.width / 2 - actualWidth / 2}; |
| 45 | + break; |
| 46 | + case 'e': |
| 47 | + tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth - this.options.offset}; |
| 48 | + break; |
| 49 | + case 'w': |
| 50 | + tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left + pos.width + this.options.offset}; |
| 51 | + break; |
| 52 | + } |
| 53 | + |
| 54 | + if (gravity.length == 2) { |
| 55 | + if (gravity.charAt(1) == 'w') { |
| 56 | + tp.left = pos.left + pos.width / 2 - 15; |
| 57 | + } else { |
| 58 | + tp.left = pos.left + pos.width / 2 - actualWidth + 15; |
| 59 | + } |
| 60 | + } |
| 61 | + |
| 62 | + $tip.css(tp).addClass('tipsy-' + gravity); |
| 63 | + $tip.find('.tipsy-arrow')[0].className = 'tipsy-arrow tipsy-arrow-' + gravity.charAt(0); |
| 64 | + if (this.options.className) { |
| 65 | + $tip.addClass(maybeCall(this.options.className, this.$element[0])); |
| 66 | + } |
| 67 | + |
| 68 | + if (this.options.fade) { |
| 69 | + $tip.stop().css({opacity: 0, display: 'block', visibility: 'visible'}).animate({opacity: this.options.opacity}); |
| 70 | + } else { |
| 71 | + $tip.css({visibility: 'visible', opacity: this.options.opacity}); |
| 72 | + } |
| 73 | + } |
| 74 | + }, |
| 75 | + |
| 76 | + hide: function() { |
| 77 | + if (this.options.fade) { |
| 78 | + this.tip().stop().fadeOut(function() { $(this).remove(); }); |
| 79 | + } else { |
| 80 | + this.tip().remove(); |
| 81 | + } |
| 82 | + }, |
| 83 | + |
| 84 | + fixTitle: function() { |
| 85 | + var $e = this.$element; |
| 86 | + if ($e.attr('title') || typeof($e.attr('original-title')) != 'string') { |
| 87 | + $e.attr('original-title', $e.attr('title') || '').removeAttr('title'); |
| 88 | + } |
| 89 | + }, |
| 90 | + |
| 91 | + getTitle: function() { |
| 92 | + var title, $e = this.$element, o = this.options; |
| 93 | + this.fixTitle(); |
| 94 | + var title, o = this.options; |
| 95 | + if (typeof o.title == 'string') { |
| 96 | + title = $e.attr(o.title == 'title' ? 'original-title' : o.title); |
| 97 | + } else if (typeof o.title == 'function') { |
| 98 | + title = o.title.call($e[0]); |
| 99 | + } |
| 100 | + title = ('' + title).replace(/(^\s*|\s*$)/, ""); |
| 101 | + return title || o.fallback; |
| 102 | + }, |
| 103 | + |
| 104 | + tip: function() { |
| 105 | + if (!this.$tip) { |
| 106 | + this.$tip = $('<div class="tipsy"></div>').html('<div class="tipsy-arrow"></div><div class="tipsy-inner"></div>'); |
| 107 | + } |
| 108 | + return this.$tip; |
| 109 | + }, |
| 110 | + |
| 111 | + validate: function() { |
| 112 | + if (!this.$element[0].parentNode) { |
| 113 | + this.hide(); |
| 114 | + this.$element = null; |
| 115 | + this.options = null; |
| 116 | + } |
| 117 | + }, |
| 118 | + |
| 119 | + enable: function() { this.enabled = true; }, |
| 120 | + disable: function() { this.enabled = false; }, |
| 121 | + toggleEnabled: function() { this.enabled = !this.enabled; } |
| 122 | + }; |
| 123 | + |
| 124 | + $.fn.tipsy = function(options) { |
| 125 | + |
| 126 | + if (options === true) { |
| 127 | + return this.data('tipsy'); |
| 128 | + } else if (typeof options == 'string') { |
| 129 | + var tipsy = this.data('tipsy'); |
| 130 | + if (tipsy) tipsy[options](); |
| 131 | + return this; |
| 132 | + } |
| 133 | + |
| 134 | + options = $.extend({}, $.fn.tipsy.defaults, options); |
| 135 | + |
| 136 | + function get(ele) { |
| 137 | + var tipsy = $.data(ele, 'tipsy'); |
| 138 | + if (!tipsy) { |
| 139 | + tipsy = new Tipsy(ele, $.fn.tipsy.elementOptions(ele, options)); |
| 140 | + $.data(ele, 'tipsy', tipsy); |
| 141 | + } |
| 142 | + return tipsy; |
| 143 | + } |
| 144 | + |
| 145 | + function enter() { |
| 146 | + var tipsy = get(this); |
| 147 | + tipsy.hoverState = 'in'; |
| 148 | + if (options.delayIn == 0) { |
| 149 | + tipsy.show(); |
| 150 | + } else { |
| 151 | + tipsy.fixTitle(); |
| 152 | + setTimeout(function() { if (tipsy.hoverState == 'in') tipsy.show(); }, options.delayIn); |
| 153 | + } |
| 154 | + }; |
| 155 | + |
| 156 | + function leave() { |
| 157 | + var tipsy = get(this); |
| 158 | + tipsy.hoverState = 'out'; |
| 159 | + if (options.delayOut == 0) { |
| 160 | + tipsy.hide(); |
| 161 | + } else { |
| 162 | + setTimeout(function() { if (tipsy.hoverState == 'out') tipsy.hide(); }, options.delayOut); |
| 163 | + } |
| 164 | + }; |
| 165 | + |
| 166 | + if (!options.live) this.each(function() { get(this); }); |
| 167 | + |
| 168 | + if (options.trigger != 'manual') { |
| 169 | + var binder = options.live ? 'live' : 'bind', |
| 170 | + eventIn = options.trigger == 'hover' ? 'mouseenter' : 'focus', |
| 171 | + eventOut = options.trigger == 'hover' ? 'mouseleave' : 'blur'; |
| 172 | + this[binder](eventIn, enter)[binder](eventOut, leave); |
| 173 | + } |
| 174 | + |
| 175 | + return this; |
| 176 | + |
| 177 | + }; |
| 178 | + |
| 179 | + $.fn.tipsy.defaults = { |
| 180 | + className: null, |
| 181 | + delayIn: 0, |
| 182 | + delayOut: 0, |
| 183 | + fade: false, |
| 184 | + fallback: '', |
| 185 | + gravity: 'n', |
| 186 | + html: false, |
| 187 | + live: false, |
| 188 | + offset: 0, |
| 189 | + opacity: 0.8, |
| 190 | + title: 'title', |
| 191 | + trigger: 'hover' |
| 192 | + }; |
| 193 | + |
| 194 | + // Overwrite this method to provide options on a per-element basis. |
| 195 | + // For example, you could store the gravity in a 'tipsy-gravity' attribute: |
| 196 | + // return $.extend({}, options, {gravity: $(ele).attr('tipsy-gravity') || 'n' }); |
| 197 | + // (remember - do not modify 'options' in place!) |
| 198 | + $.fn.tipsy.elementOptions = function(ele, options) { |
| 199 | + return $.metadata ? $.extend({}, options, $(ele).metadata()) : options; |
| 200 | + }; |
| 201 | + |
| 202 | + $.fn.tipsy.autoNS = function() { |
| 203 | + return $(this).offset().top > ($(document).scrollTop() + $(window).height() / 2) ? 's' : 'n'; |
| 204 | + }; |
| 205 | + |
| 206 | + $.fn.tipsy.autoWE = function() { |
| 207 | + return $(this).offset().left > ($(document).scrollLeft() + $(window).width() / 2) ? 'e' : 'w'; |
| 208 | + }; |
| 209 | + |
| 210 | + /** |
| 211 | + * yields a closure of the supplied parameters, producing a function that takes |
| 212 | + * no arguments and is suitable for use as an autogravity function like so: |
| 213 | + * |
| 214 | + * @param margin (int) - distance from the viewable region edge that an |
| 215 | + * element should be before setting its tooltip's gravity to be away |
| 216 | + * from that edge. |
| 217 | + * @param prefer (string, e.g. 'n', 'sw', 'w') - the direction to prefer |
| 218 | + * if there are no viewable region edges effecting the tooltip's |
| 219 | + * gravity. It will try to vary from this minimally, for example, |
| 220 | + * if 'sw' is preferred and an element is near the right viewable |
| 221 | + * region edge, but not the top edge, it will set the gravity for |
| 222 | + * that element's tooltip to be 'se', preserving the southern |
| 223 | + * component. |
| 224 | + */ |
| 225 | + $.fn.tipsy.autoBounds = function(margin, prefer) { |
| 226 | + return function() { |
| 227 | + var dir = {ns: prefer[0], ew: (prefer.length > 1 ? prefer[1] : false)}, |
| 228 | + boundTop = $(document).scrollTop() + margin, |
| 229 | + boundLeft = $(document).scrollLeft() + margin, |
| 230 | + $this = $(this); |
| 231 | + |
| 232 | + if ($this.offset().top < boundTop) dir.ns = 'n'; |
| 233 | + if ($this.offset().left < boundLeft) dir.ew = 'w'; |
| 234 | + if ($(window).width() + $(document).scrollLeft() - $this.offset().left < margin) dir.ew = 'e'; |
| 235 | + if ($(window).height() + $(document).scrollTop() - $this.offset().top < margin) dir.ns = 's'; |
| 236 | + |
| 237 | + return dir.ns + (dir.ew ? dir.ew : ''); |
| 238 | + } |
| 239 | + }; |
| 240 | + |
| 241 | +})(jQuery); |
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