| /*! |
| * jQuery.scrollTo |
| * Copyright (c) 2007-2015 Ariel Flesler - aflesler<a>gmail<d>com | http://flesler.blogspot.com |
| * Licensed under MIT |
| * http://flesler.blogspot.com/2007/10/jqueryscrollto.html |
| * @projectDescription Lightweight, cross-browser and highly customizable animated scrolling with jQuery |
| * @author Ariel Flesler |
| * @version 2.1.2 |
| */ |
| ;(function(factory) { |
| 'use strict'; |
| if (typeof define === 'function' && define.amd) { |
| // AMD |
| define(['jquery'], factory); |
| } else if (typeof module !== 'undefined' && module.exports) { |
| // CommonJS |
| module.exports = factory(require('jquery')); |
| } else { |
| // Global |
| factory(jQuery); |
| } |
| })(function($) { |
| 'use strict'; |
| |
| var $scrollTo = $.scrollTo = function(target, duration, settings) { |
| return $(window).scrollTo(target, duration, settings); |
| }; |
| |
| $scrollTo.defaults = { |
| axis:'xy', |
| duration: 0, |
| limit:true |
| }; |
| |
| function isWin(elem) { |
| return !elem.nodeName || |
| $.inArray(elem.nodeName.toLowerCase(), ['iframe','#document','html','body']) !== -1; |
| } |
| |
| $.fn.scrollTo = function(target, duration, settings) { |
| if (typeof duration === 'object') { |
| settings = duration; |
| duration = 0; |
| } |
| if (typeof settings === 'function') { |
| settings = { onAfter:settings }; |
| } |
| if (target === 'max') { |
| target = 9e9; |
| } |
| |
| settings = $.extend({}, $scrollTo.defaults, settings); |
| // Speed is still recognized for backwards compatibility |
| duration = duration || settings.duration; |
| // Make sure the settings are given right |
| var queue = settings.queue && settings.axis.length > 1; |
| if (queue) { |
| // Let's keep the overall duration |
| duration /= 2; |
| } |
| settings.offset = both(settings.offset); |
| settings.over = both(settings.over); |
| |
| return this.each(function() { |
| // Null target yields nothing, just like jQuery does |
| if (target === null) return; |
| |
| var win = isWin(this), |
| elem = win ? this.contentWindow || window : this, |
| $elem = $(elem), |
| targ = target, |
| attr = {}, |
| toff; |
| |
| switch (typeof targ) { |
| // A number will pass the regex |
| case 'number': |
| case 'string': |
| if (/^([+-]=?)?\d+(\.\d+)?(px|%)?$/.test(targ)) { |
| targ = both(targ); |
| // We are done |
| break; |
| } |
| // Relative/Absolute selector |
| targ = win ? $(targ) : $(targ, elem); |
| /* falls through */ |
| case 'object': |
| if (targ.length === 0) return; |
| // DOMElement / jQuery |
| if (targ.is || targ.style) { |
| // Get the real position of the target |
| toff = (targ = $(targ)).offset(); |
| } |
| } |
| |
| var offset = $.isFunction(settings.offset) && settings.offset(elem, targ) || settings.offset; |
| |
| $.each(settings.axis.split(''), function(i, axis) { |
| var Pos = axis === 'x' ? 'Left' : 'Top', |
| pos = Pos.toLowerCase(), |
| key = 'scroll' + Pos, |
| prev = $elem[key](), |
| max = $scrollTo.max(elem, axis); |
| |
| if (toff) {// jQuery / DOMElement |
| attr[key] = toff[pos] + (win ? 0 : prev - $elem.offset()[pos]); |
| |
| // If it's a dom element, reduce the margin |
| if (settings.margin) { |
| attr[key] -= parseInt(targ.css('margin'+Pos), 10) || 0; |
| attr[key] -= parseInt(targ.css('border'+Pos+'Width'), 10) || 0; |
| } |
| |
| attr[key] += offset[pos] || 0; |
| |
| if (settings.over[pos]) { |
| // Scroll to a fraction of its width/height |
| attr[key] += targ[axis === 'x'?'width':'height']() * settings.over[pos]; |
| } |
| } else { |
| var val = targ[pos]; |
| // Handle percentage values |
| attr[key] = val.slice && val.slice(-1) === '%' ? |
| parseFloat(val) / 100 * max |
| : val; |
| } |
| |
| // Number or 'number' |
| if (settings.limit && /^\d+$/.test(attr[key])) { |
| // Check the limits |
| attr[key] = attr[key] <= 0 ? 0 : Math.min(attr[key], max); |
| } |
| |
| // Don't waste time animating, if there's no need. |
| if (!i && settings.axis.length > 1) { |
| if (prev === attr[key]) { |
| // No animation needed |
| attr = {}; |
| } else if (queue) { |
| // Intermediate animation |
| animate(settings.onAfterFirst); |
| // Don't animate this axis again in the next iteration. |
| attr = {}; |
| } |
| } |
| }); |
| |
| animate(settings.onAfter); |
| |
| function animate(callback) { |
| var opts = $.extend({}, settings, { |
| // The queue setting conflicts with animate() |
| // Force it to always be true |
| queue: true, |
| duration: duration, |
| complete: callback && function() { |
| callback.call(elem, targ, settings); |
| } |
| }); |
| $elem.animate(attr, opts); |
| } |
| }); |
| }; |
| |
| // Max scrolling position, works on quirks mode |
| // It only fails (not too badly) on IE, quirks mode. |
| $scrollTo.max = function(elem, axis) { |
| var Dim = axis === 'x' ? 'Width' : 'Height', |
| scroll = 'scroll'+Dim; |
| |
| if (!isWin(elem)) |
| return elem[scroll] - $(elem)[Dim.toLowerCase()](); |
| |
| var size = 'client' + Dim, |
| doc = elem.ownerDocument || elem.document, |
| html = doc.documentElement, |
| body = doc.body; |
| |
| return Math.max(html[scroll], body[scroll]) - Math.min(html[size], body[size]); |
| }; |
| |
| function both(val) { |
| return $.isFunction(val) || $.isPlainObject(val) ? val : { top:val, left:val }; |
| } |
| |
| // Add special hooks so that window scroll properties can be animated |
| $.Tween.propHooks.scrollLeft = |
| $.Tween.propHooks.scrollTop = { |
| get: function(t) { |
| return $(t.elem)[t.prop](); |
| }, |
| set: function(t) { |
| var curr = this.get(t); |
| // If interrupt is true and user scrolled, stop animating |
| if (t.options.interrupt && t._last && t._last !== curr) { |
| return $(t.elem).stop(); |
| } |
| var next = Math.round(t.now); |
| // Don't waste CPU |
| // Browsers don't render floating point scroll |
| if (curr !== next) { |
| $(t.elem)[t.prop](next); |
| t._last = this.get(t); |
| } |
| } |
| }; |
| |
| // AMD requirement |
| return $scrollTo; |
| }); |