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tipsy.js
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tipsy.js
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// tipsy, facebook style tooltips for jquery
// version 1.0.0a
// (c) 2008-2010 jason frame [jason@onehackoranother.com]
// released under the MIT license
(function($) {
function maybeCall(thing, ctx) {
return (typeof thing == 'function') ? (thing.call(ctx)) : thing;
}
function Tipsy(element, options) {
this.$element = $(element);
this.options = options;
this.enabled = true;
this.fixTitle();
}
Tipsy.prototype = {
show: function() {
var title = this.getTitle();
if (title && this.enabled) {
var $tip = this.tip();
$tip.find('.tipsy-inner')[this.options.html ? 'html' : 'text'](title);
$tip[0].className = 'tipsy'; // reset classname in case of dynamic gravity
$tip.remove().css({top: 0, left: 0, visibility: 'hidden', display: 'block'}).prependTo(document.body);
var pos = $.extend({}, this.$element.offset(), {
width: this.$element[0].offsetWidth || 0,
height: this.$element[0].offsetHeight || 0
});
if (typeof this.$element[0].nearestViewportElement == 'object') {
// SVG
var el = this.$element[0];
var rect = el.getBoundingClientRect();
pos.width = rect.width;
pos.height = rect.height;
}
var actualWidth = $tip[0].offsetWidth,
actualHeight = $tip[0].offsetHeight,
gravity = maybeCall(this.options.gravity, this.$element[0]);
var tp;
switch (gravity.charAt(0)) {
case 'n':
tp = {top: pos.top + pos.height + this.options.offset, left: pos.left + pos.width / 2 - actualWidth / 2};
break;
case 's':
tp = {top: pos.top - actualHeight - this.options.offset, left: pos.left + pos.width / 2 - actualWidth / 2};
break;
case 'e':
tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth - this.options.offset};
break;
case 'w':
tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left + pos.width + this.options.offset};
break;
}
if (gravity.length == 2) {
if (gravity.charAt(1) == 'w') {
tp.left = pos.left + pos.width / 2 - 15;
} else {
tp.left = pos.left + pos.width / 2 - actualWidth + 15;
}
}
$tip.css(tp).addClass('tipsy-' + gravity);
$tip.find('.tipsy-arrow')[0].className = 'tipsy-arrow tipsy-arrow-' + gravity.charAt(0);
if (this.options.className) {
$tip.addClass(maybeCall(this.options.className, this.$element[0]));
}
if (this.options.fade) {
$tip.stop().css({opacity: 0, display: 'block', visibility: 'visible'}).animate({opacity: this.options.opacity});
} else {
$tip.css({visibility: 'visible', opacity: this.options.opacity});
}
var t = this;
var set_hovered = function(set_hover){
return function(){
t.$tip.stop();
t.tipHovered = set_hover;
if (!set_hover){
if (t.options.delayOut === 0) {
t.hide();
} else {
setTimeout(function() {
if (t.hoverState == 'out') t.hide(); }, t.options.delayOut);
}
}
};
};
$tip.hover(set_hovered(true), set_hovered(false));
}
},
hide: function() {
if (this.options.fade) {
this.tip().stop().fadeOut(function() { $(this).remove(); });
} else {
this.tip().remove();
}
},
fixTitle: function() {
var $e = this.$element;
if ($e.attr('title') || typeof($e.attr('original-title')) != 'string') {
$e.attr('original-title', $e.attr('title') || '').removeAttr('title');
}
if (typeof $e.context.nearestViewportElement == 'object'){
if ($e.children('title').length){
$e.append('<original-title>' + ($e.children('title').text() || '') + '</original-title>')
.children('title').remove();
}
}
},
getTitle: function() {
var title, $e = this.$element, o = this.options;
this.fixTitle();
if (typeof o.title == 'string') {
var title_name = o.title == 'title' ? 'original-title' : o.title;
if ($e.children(title_name).length){
title = $e.children(title_name).html();
} else{
title = $e.attr(title_name);
}
} else if (typeof o.title == 'function') {
title = o.title.call($e[0]);
}
title = ('' + title).replace(/(^\s*|\s*$)/, "");
return title || o.fallback;
},
tip: function() {
if (!this.$tip) {
this.$tip = $('<div class="tipsy"></div>').html('<div class="tipsy-arrow"></div><div class="tipsy-inner"></div>');
}
return this.$tip;
},
validate: function() {
if (!this.$element[0].parentNode) {
this.hide();
this.$element = null;
this.options = null;
}
},
enable: function() { this.enabled = true; },
disable: function() { this.enabled = false; },
toggleEnabled: function() { this.enabled = !this.enabled; }
};
$.fn.tipsy = function(options) {
if (options === true) {
return this.data('tipsy');
} else if (typeof options == 'string') {
var tipsy = this.data('tipsy');
if (tipsy) tipsy[options]();
return this;
}
options = $.extend({}, $.fn.tipsy.defaults, options);
if (options.hoverlock && options.delayOut === 0) {
options.delayOut = 100;
}
function get(ele) {
var tipsy = $.data(ele, 'tipsy');
if (!tipsy) {
tipsy = new Tipsy(ele, $.fn.tipsy.elementOptions(ele, options));
$.data(ele, 'tipsy', tipsy);
}
return tipsy;
}
function enter() {
var tipsy = get(this);
tipsy.hoverState = 'in';
if (options.delayIn === 0) {
tipsy.show();
} else {
tipsy.fixTitle();
setTimeout(function() { if (tipsy.hoverState == 'in') tipsy.show(); }, options.delayIn);
}
}
function leave() {
var tipsy = get(this);
tipsy.hoverState = 'out';
if (options.delayOut === 0) {
tipsy.hide();
} else {
var to = function() {
if (!tipsy.tipHovered || !options.hoverlock){
if (tipsy.hoverState == 'out') tipsy.hide();
}
};
setTimeout(to, options.delayOut);
}
}
if (options.trigger != 'manual') {
var binder = options.live ? 'live' : 'bind',
eventIn = options.trigger == 'hover' ? 'mouseenter' : 'focus',
eventOut = options.trigger == 'hover' ? 'mouseleave' : 'blur';
this[binder](eventIn, enter)[binder](eventOut, leave);
}
return this;
};
$.fn.tipsy.defaults = {
className: null,
delayIn: 0,
delayOut: 0,
fade: false,
fallback: '',
gravity: 'n',
html: false,
live: false,
offset: 0,
opacity: 0.8,
title: 'title',
trigger: 'hover',
hoverlock: false
};
// Overwrite this method to provide options on a per-element basis.
// For example, you could store the gravity in a 'tipsy-gravity' attribute:
// return $.extend({}, options, {gravity: $(ele).attr('tipsy-gravity') || 'n' });
// (remember - do not modify 'options' in place!)
$.fn.tipsy.elementOptions = function(ele, options) {
return $.metadata ? $.extend({}, options, $(ele).metadata()) : options;
};
$.fn.tipsy.autoNS = function() {
return $(this).offset().top > ($(document).scrollTop() + $(window).height() / 2) ? 's' : 'n';
};
$.fn.tipsy.autoWE = function() {
return $(this).offset().left > ($(document).scrollLeft() + $(window).width() / 2) ? 'e' : 'w';
};
/**
* yields a closure of the supplied parameters, producing a function that takes
* no arguments and is suitable for use as an autogravity function like so:
*
* @param margin (int) - distance from the viewable region edge that an
* element should be before setting its tooltip's gravity to be away
* from that edge.
* @param prefer (string, e.g. 'n', 'sw', 'w') - the direction to prefer
* if there are no viewable region edges effecting the tooltip's
* gravity. It will try to vary from this minimally, for example,
* if 'sw' is preferred and an element is near the right viewable
* region edge, but not the top edge, it will set the gravity for
* that element's tooltip to be 'se', preserving the southern
* component.
*/
$.fn.tipsy.autoBounds = function(margin, prefer) {
return function() {
var dir = {ns: prefer[0], ew: (prefer.length > 1 ? prefer[1] : false)},
boundTop = $(document).scrollTop() + margin,
boundLeft = $(document).scrollLeft() + margin,
$this = $(this);
if ($this.offset().top < boundTop) dir.ns = 'n';
if ($this.offset().left < boundLeft) dir.ew = 'w';
if ($(window).width() + $(document).scrollLeft() - $this.offset().left < margin) dir.ew = 'e';
if ($(window).height() + $(document).scrollTop() - $this.offset().top < margin) dir.ns = 's';
return dir.ns + (dir.ew ? dir.ew : '');
};
};
})(jQuery);