/*! * Smooth Scroll - v1.4.13 - 2013-11-02 * https://github.com/kswedberg/jquery-smooth-scroll * Copyright (c) 2013 Karl Swedberg * Licensed MIT (https://github.com/kswedberg/jquery-smooth-scroll/blob/master/LICENSE-MIT) */ (function($) { var version = '1.4.13', optionOverrides = {}, defaults = { exclude: [], excludeWithin: [], offset: 0, // one of 'top' or 'left' direction: 'top', // jQuery set of elements you wish to scroll (for $.smoothScroll). // if null (default), $('html, body').firstScrollable() is used. scrollElement: null, // only use if you want to override default behavior scrollTarget: null, // fn(opts) function to be called before scrolling occurs. // `this` is the element(s) being scrolled beforeScroll: function() {}, // fn(opts) function to be called after scrolling occurs. // `this` is the triggering element afterScroll: function() {}, easing: 'swing', speed: 400, // coefficient for "auto" speed autoCoefficent: 2, // $.fn.smoothScroll only: whether to prevent the default click action preventDefault: true }, getScrollable = function(opts) { var scrollable = [], scrolled = false, dir = opts.dir && opts.dir == 'left' ? 'scrollLeft' : 'scrollTop'; this.each(function() { if (this == document || this == window) { return; } var el = $(this); if (el[dir]() > 0) { scrollable.push(this); } else { // if scroll(Top|Left) === 0, nudge the element 1px and see if it moves el[dir](1); scrolled = el[dir]() > 0; if (scrolled) { scrollable.push(this); } // then put it back, of course el[dir](0); } }); // If no scrollable elements, fall back to , // if it's in the jQuery collection // (doing this because Safari sets scrollTop async, // so can't set it to 1 and immediately get the value.) if (!scrollable.length) { this.each(function(index) { if (this.nodeName === 'BODY') { scrollable = [this]; } }); } // Use the first scrollable element if we're calling firstScrollable() if (opts.el === 'first' && scrollable.length > 1) { scrollable = [scrollable[0]]; } return scrollable; }, isTouch = 'ontouchend' in document; $.fn.extend({ scrollable: function(dir) { var scrl = getScrollable.call(this, { dir: dir }); return this.pushStack(scrl); }, firstScrollable: function(dir) { var scrl = getScrollable.call(this, { el: 'first', dir: dir }); return this.pushStack(scrl); }, smoothScroll: function(options, extra) { options = options || {}; if (options === 'options') { if (!extra) { return this.first().data('ssOpts'); } return this.each(function() { var $this = $(this), opts = $.extend($this.data('ssOpts') || {}, extra); $(this).data('ssOpts', opts); }); } var opts = $.extend({}, $.fn.smoothScroll.defaults, options), locationPath = $.smoothScroll.filterPath(location.pathname); this .unbind('click.smoothscroll') .bind('click.smoothscroll', function(event) { var link = this, $link = $(this), thisOpts = $.extend({}, opts, $link.data('ssOpts') || {}), exclude = opts.exclude, excludeWithin = thisOpts.excludeWithin, elCounter = 0, ewlCounter = 0, include = true, clickOpts = {}, hostMatch = ((location.hostname === link.hostname) || !link.hostname), pathMatch = thisOpts.scrollTarget || ($.smoothScroll.filterPath(link.pathname) || locationPath) === locationPath, thisHash = escapeSelector(link.hash); if (!thisOpts.scrollTarget && (!hostMatch || !pathMatch || !thisHash)) { include = false; } else { while (include && elCounter < exclude.length) { if ($link.is(escapeSelector(exclude[elCounter++]))) { include = false; } } while (include && ewlCounter < excludeWithin.length) { if ($link.closest(excludeWithin[ewlCounter++]).length) { include = false; } } } if (include) { if (thisOpts.preventDefault) { event.preventDefault(); } $.extend(clickOpts, thisOpts, { scrollTarget: thisOpts.scrollTarget || thisHash, link: link }); $.smoothScroll(clickOpts); } }); return this; } }); $.smoothScroll = function(options, px) { if (options === 'options' && typeof px === 'object') { return $.extend(optionOverrides, px); } var opts, $scroller, scrollTargetOffset, speed, scrollerOffset = 0, offPos = 'offset', scrollDir = 'scrollTop', aniProps = {}, aniOpts = {}, scrollprops = []; if (typeof options === 'number') { opts = $.extend({ link: null }, $.fn.smoothScroll.defaults, optionOverrides); scrollTargetOffset = options; } else { opts = $.extend({ link: null }, $.fn.smoothScroll.defaults, options || {}, optionOverrides); if (opts.scrollElement) { offPos = 'position'; if (opts.scrollElement.css('position') == 'static') { opts.scrollElement.css('position', 'relative'); } } } scrollDir = opts.direction == 'left' ? 'scrollLeft' : scrollDir; if (opts.scrollElement) { $scroller = opts.scrollElement; if (!(/^(?:HTML|BODY)$/).test($scroller[0].nodeName)) { scrollerOffset = $scroller[scrollDir](); } } else { $scroller = $('html, body').firstScrollable(opts.direction); } // beforeScroll callback function must fire before calculating offset opts.beforeScroll.call($scroller, opts); scrollTargetOffset = (typeof options === 'number') ? options : px || ($(opts.scrollTarget)[offPos]() && $(opts.scrollTarget)[offPos]()[opts.direction]) || 0; aniProps[scrollDir] = scrollTargetOffset + scrollerOffset + opts.offset; speed = opts.speed; // automatically calculate the speed of the scroll based on distance / coefficient if (speed === 'auto') { // if aniProps[scrollDir] == 0 then we'll use scrollTop() value instead speed = aniProps[scrollDir] || $scroller.scrollTop(); // divide the speed by the coefficient speed = speed / opts.autoCoefficent; } aniOpts = { duration: speed, easing: opts.easing, complete: function() { opts.afterScroll.call(opts.link, opts); } }; if (opts.step) { aniOpts.step = opts.step; } if ($scroller.length) { $scroller.stop().animate(aniProps, aniOpts); } else { opts.afterScroll.call(opts.link, opts); } }; $.smoothScroll.version = version; $.smoothScroll.filterPath = function(string) { return string .replace(/^\//, '') .replace(/(?:index|default).[a-zA-Z]{3,4}$/, '') .replace(/\/$/, ''); }; // default options $.fn.smoothScroll.defaults = defaults; function escapeSelector(str) { return str.replace(/(:|\.)/g, '\\$1'); } })(jQuery);