--- /dev/null
+/*!
+ * 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;
+});
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