1// tipsy, facebook style tooltips for jquery 2// version 1.0.0a 3// (c) 2008-2010 jason frame [[email protected]] 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 eventIn = options.trigger == 'hover' ? 'mouseenter' : 'focus', 170 eventOut = options.trigger == 'hover' ? 'mouseleave' : 'blur'; 171 if (options.live) 172 $(document).on(eventIn, this.selector, enter).on(eventOut, this.selector, leave); 173 else 174 this.bind(eventIn, enter).bind(eventOut, leave); 175 } 176 177 return this; 178 179 }; 180 181 $.fn.tipsy.defaults = { 182 className: null, 183 delayIn: 0, 184 delayOut: 0, 185 fade: false, 186 fallback: '', 187 gravity: 'n', 188 html: false, 189 live: false, 190 offset: 0, 191 opacity: 0.8, 192 title: 'title',
193 trigger: 'hover' 194 }; 195 196 // Overwrite this method to provide options on a per-element basis. 197 // For example, you could store the gravity in a 'tipsy-gravity' attribute: 198 // return $.extend({}, options, {gravity: $(ele).attr('tipsy-gravity') || 'n' }); 199 // (remember - do not modify 'options' in place!) 200 $.fn.tipsy.elementOptions = function(ele, options) { 201 return $.metadata ? $.extend({}, options, $(ele).metadata()) : options; 202 }; 203 204 $.fn.tipsy.autoNS = function() { 205 return $(this).offset().top > ($(document).scrollTop() + $(window).height() / 2) ? 's' : 'n'; 206 }; 207 208 $.fn.tipsy.autoWE = function() { 209 return $(this).offset().left > ($(document).scrollLeft() + $(window).width() / 2) ? 'e' : 'w'; 210 }; 211 212 /** 213 * yields a closure of the supplied parameters, producing a function that takes 214 * no arguments and is suitable for use as an autogravity function like so: 215 * 216 * @param margin (int) - distance from the viewable region edge that an 217 * element should be before setting its tooltip's gravity to be away 218 * from that edge. 219 * @param prefer (string, e.g. 'n', 'sw', 'w') - the direction to prefer 220 * if there are no viewable region edges effecting the tooltip's 221 * gravity. It will try to vary from this minimally, for example, 222 * if 'sw' is preferred and an element is near the right viewable 223 * region edge, but not the top edge, it will set the gravity for 224 * that element's tooltip to be 'se', preserving the southern 225 * component. 226 */ 227 $.fn.tipsy.autoBounds = function(margin, prefer) { 228 return function() { 229 var dir = {ns: prefer[0], ew: (prefer.length > 1 ? prefer[1] : false)}, 230 boundTop = $(document).scrollTop() + margin, 231 boundLeft = $(document).scrollLeft() + margin, 232 $this = $(this); 233 234 if ($this.offset().top < boundTop) dir.ns = 'n'; 235 if ($this.offset().left < boundLeft) dir.ew = 'w'; 236 if ($(window).width() + $(document).scrollLeft() - $this.offset().left < margin) dir.ew = 'e'; 237 if ($(window).height() + $(document).scrollTop() - $this.offset().top < margin) dir.ns = 's'; 238 239 return dir.ns + (dir.ew ? dir.ew : ''); 240 } 241 }; 242 243})(jQuery);
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