forked from Mirrors/apostrophe
848 lines
26 KiB
JavaScript
848 lines
26 KiB
JavaScript
/*!
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* jQuery Scrollify
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* Version 1.0.19
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*
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* Requires:
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* - jQuery 1.7 or higher
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*
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* https://github.com/lukehaas/Scrollify
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*
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* Copyright 2016, Luke Haas
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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if touchScroll is false - update index
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*/
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(function (global,factory) {
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"use strict";
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if (typeof define === 'function' && define.amd) {
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// AMD. Register as an anonymous module.
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define(['jquery'], function($) {
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return factory($, global, global.document);
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});
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} else if (typeof module === 'object' && module.exports) {
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// Node/CommonJS
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module.exports = factory(require('jquery'), global, global.document);
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} else {
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// Browser globals
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factory(jQuery, global, global.document);
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}
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}(typeof window !== 'undefined' ? window : this, function ($, window, document, undefined) {
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"use strict";
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var heights = [],
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names = [],
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elements = [],
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overflow = [],
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index = 0,
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currentIndex = 0,
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interstitialIndex = 1,
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hasLocation = false,
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timeoutId,
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timeoutId2,
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$window = $(window),
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portHeight,
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top = $window.scrollTop(),
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scrollable = false,
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locked = false,
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scrolled = false,
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manualScroll,
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swipeScroll,
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util,
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disabled = false,
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scrollSamples = [],
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scrollTime = new Date().getTime(),
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firstLoad = true,
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initialised = false,
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destination = 0,
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wheelEvent = 'onwheel' in document ? 'wheel' : document.onmousewheel !== undefined ? 'mousewheel' : 'DOMMouseScroll',
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settings = {
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//section should be an identifier that is the same for each section
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section: ".section",
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sectionName: "section-name",
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interstitialSection: "",
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easing: "easeOutExpo",
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scrollSpeed: 1100,
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offset: 0,
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scrollbars: true,
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target:"html,body",
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standardScrollElements: false,
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setHeights: true,
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overflowScroll:true,
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updateHash: true,
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touchScroll:true,
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before:function() {},
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after:function() {},
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afterResize:function() {},
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afterRender:function() {}
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};
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function getportHeight() {
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return ($window.height() + settings.offset);
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}
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function animateScroll(index,instant,callbacks,toTop) {
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if(currentIndex===index) {
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callbacks = false;
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}
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if(disabled===true) {
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return true;
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}
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if(names[index]) {
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scrollable = false;
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if(firstLoad===true) {
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settings.afterRender();
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firstLoad = false;
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}
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if(callbacks) {
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if( typeof settings.before == 'function' && settings.before(index,elements) === false ){
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return true;
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}
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}
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interstitialIndex = 1;
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destination = heights[index];
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if(firstLoad===false && currentIndex>index && toTop===false) {
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//We're going backwards
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if(overflow[index]) {
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portHeight = getportHeight();
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interstitialIndex = parseInt(elements[index].outerHeight()/portHeight);
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destination = parseInt(heights[index])+(elements[index].outerHeight()-portHeight);
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}
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}
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if(settings.updateHash && settings.sectionName && !(firstLoad===true && index===0)) {
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if(history.pushState) {
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try {
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history.replaceState(null, null, names[index]);
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} catch (e) {
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if(window.console) {
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console.warn("Scrollify warning: Page must be hosted to manipulate the hash value.");
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}
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}
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} else {
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window.location.hash = names[index];
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}
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}
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currentIndex = index;
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if(instant) {
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$(settings.target).stop().scrollTop(destination);
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if(callbacks) {
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settings.after(index,elements);
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}
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} else {
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locked = true;
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if( $().velocity ) {
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$(settings.target).stop().velocity('scroll', {
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duration: settings.scrollSpeed,
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easing: settings.easing,
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offset: destination,
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mobileHA: false
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});
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} else {
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$(settings.target).stop().animate({
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scrollTop: destination
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}, settings.scrollSpeed,settings.easing);
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}
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if(window.location.hash.length && settings.sectionName && window.console) {
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try {
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if($(window.location.hash).length) {
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console.warn("Scrollify warning: ID matches hash value - this will cause the page to anchor.");
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}
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} catch (e) {}
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}
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$(settings.target).promise().done(function(){
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locked = false;
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firstLoad = false;
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if(callbacks) {
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settings.after(index,elements);
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}
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});
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}
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}
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}
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function isAccelerating(samples) {
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function average(num) {
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var sum = 0;
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var lastElements = samples.slice(Math.max(samples.length - num, 1));
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for(var i = 0; i < lastElements.length; i++){
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sum += lastElements[i];
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}
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return Math.ceil(sum/num);
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}
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var avEnd = average(10);
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var avMiddle = average(70);
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if(avEnd >= avMiddle) {
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return true;
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} else {
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return false;
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}
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}
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var scrollify = function(options) {
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initialised = true;
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$.easing['easeOutExpo'] = function(x, t, b, c, d) {
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return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
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};
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manualScroll = {
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handleMousedown:function() {
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if(disabled===true) {
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return true;
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}
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scrollable = false;
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scrolled = false;
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},
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handleMouseup:function() {
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if(disabled===true) {
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return true;
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}
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scrollable = true;
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if(scrolled) {
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//instant,callbacks
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manualScroll.calculateNearest(false,true);
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}
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},
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handleScroll:function() {
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if(disabled===true) {
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return true;
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}
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if(timeoutId){
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clearTimeout(timeoutId);
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}
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timeoutId = setTimeout(function(){
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scrolled = true;
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if(scrollable===false) {
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return false;
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}
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scrollable = false;
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//instant,callbacks
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manualScroll.calculateNearest(false,true);
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}, 200);
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},
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calculateNearest:function(instant,callbacks) {
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top = $window.scrollTop();
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var i =1,
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max = heights.length,
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closest = 0,
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prev = Math.abs(heights[0] - top),
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diff;
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for(;i<max;i++) {
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diff = Math.abs(heights[i] - top);
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if(diff < prev) {
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prev = diff;
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closest = i;
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}
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}
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if((atBottom() && closest>index) || atTop()) {
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index = closest;
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//index, instant, callbacks, toTop
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animateScroll(closest,instant,callbacks,false);
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}
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},
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wheelHandler:function(e) {
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if(disabled===true) {
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return true;
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} else if(settings.standardScrollElements) {
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if($(e.target).is(settings.standardScrollElements) || $(e.target).closest(settings.standardScrollElements).length) {
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return true;
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}
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}
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if(!overflow[index]) {
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e.preventDefault();
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}
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var currentScrollTime = new Date().getTime();
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e = e || window.event;
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var value = e.originalEvent.wheelDelta || -e.originalEvent.deltaY || -e.originalEvent.detail;
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var delta = Math.max(-1, Math.min(1, value));
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//delta = delta || -e.originalEvent.detail / 3 || e.originalEvent.wheelDelta / 120;
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if(scrollSamples.length > 149){
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scrollSamples.shift();
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}
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//scrollSamples.push(Math.abs(delta*10));
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scrollSamples.push(Math.abs(value));
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if((currentScrollTime-scrollTime) > 200){
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scrollSamples = [];
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}
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scrollTime = currentScrollTime;
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if(locked) {
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return false;
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}
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if(delta<0) {
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if(index<heights.length-1) {
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if(atBottom()) {
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if(isAccelerating(scrollSamples)) {
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e.preventDefault();
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index++;
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locked = true;
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//index, instant, callbacks, toTop
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animateScroll(index,false,true, false);
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} else {
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return false;
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}
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}
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}
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} else if(delta>0) {
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if(index>0) {
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if(atTop()) {
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if(isAccelerating(scrollSamples)) {
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e.preventDefault();
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index--;
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locked = true;
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//index, instant, callbacks, toTop
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animateScroll(index,false,true, false);
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} else {
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return false
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}
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}
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}
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}
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},
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keyHandler:function(e) {
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if(disabled===true || document.activeElement.readOnly===false) {
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return true;
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} else if(settings.standardScrollElements) {
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if($(e.target).is(settings.standardScrollElements) || $(e.target).closest(settings.standardScrollElements).length) {
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return true;
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}
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}
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if(locked===true) {
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return false;
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}
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if(e.keyCode==38 || e.keyCode==33) {
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if(index>0) {
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if(atTop()) {
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e.preventDefault();
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index--;
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//index, instant, callbacks, toTop
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animateScroll(index,false,true,false);
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}
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}
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} else if(e.keyCode==40 || e.keyCode==34) {
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if(index<heights.length-1) {
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if(atBottom()) {
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e.preventDefault();
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index++;
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//index, instant, callbacks, toTop
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animateScroll(index,false,true,false);
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}
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}
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}
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},
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init:function() {
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if(settings.scrollbars) {
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$window.on('mousedown', manualScroll.handleMousedown);
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$window.on('mouseup', manualScroll.handleMouseup);
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$window.on('scroll', manualScroll.handleScroll);
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} else {
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$("body").css({"overflow":"hidden"});
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}
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$window.on(wheelEvent,manualScroll.wheelHandler);
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//$(document).bind(wheelEvent,manualScroll.wheelHandler);
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$window.on('keydown', manualScroll.keyHandler);
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}
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};
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swipeScroll = {
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touches : {
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"touchstart": {"y":-1,"x":-1},
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"touchmove" : {"y":-1,"x":-1},
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"touchend" : false,
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"direction" : "undetermined"
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},
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options:{
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"distance" : 30,
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"timeGap" : 800,
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"timeStamp" : new Date().getTime()
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},
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touchHandler: function(event) {
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if(disabled===true) {
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return true;
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} else if(settings.standardScrollElements) {
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if($(event.target).is(settings.standardScrollElements) || $(event.target).closest(settings.standardScrollElements).length) {
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return true;
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}
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}
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var touch;
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if (typeof event !== 'undefined'){
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if (typeof event.touches !== 'undefined') {
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touch = event.touches[0];
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switch (event.type) {
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case 'touchstart':
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swipeScroll.touches.touchstart.y = touch.pageY;
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swipeScroll.touches.touchmove.y = -1;
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swipeScroll.touches.touchstart.x = touch.pageX;
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swipeScroll.touches.touchmove.x = -1;
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swipeScroll.options.timeStamp = new Date().getTime();
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swipeScroll.touches.touchend = false;
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case 'touchmove':
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swipeScroll.touches.touchmove.y = touch.pageY;
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swipeScroll.touches.touchmove.x = touch.pageX;
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if(swipeScroll.touches.touchstart.y!==swipeScroll.touches.touchmove.y && (Math.abs(swipeScroll.touches.touchstart.y-swipeScroll.touches.touchmove.y)>Math.abs(swipeScroll.touches.touchstart.x-swipeScroll.touches.touchmove.x))) {
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//if(!overflow[index]) {
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event.preventDefault();
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//}
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swipeScroll.touches.direction = "y";
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if((swipeScroll.options.timeStamp+swipeScroll.options.timeGap)<(new Date().getTime()) && swipeScroll.touches.touchend == false) {
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swipeScroll.touches.touchend = true;
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if (swipeScroll.touches.touchstart.y > -1) {
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if(Math.abs(swipeScroll.touches.touchmove.y-swipeScroll.touches.touchstart.y)>swipeScroll.options.distance) {
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if(swipeScroll.touches.touchstart.y < swipeScroll.touches.touchmove.y) {
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swipeScroll.up();
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} else {
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swipeScroll.down();
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}
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}
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}
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}
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}
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break;
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case 'touchend':
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if(swipeScroll.touches[event.type]===false) {
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swipeScroll.touches[event.type] = true;
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if (swipeScroll.touches.touchstart.y > -1 && swipeScroll.touches.touchmove.y > -1 && swipeScroll.touches.direction==="y") {
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if(Math.abs(swipeScroll.touches.touchmove.y-swipeScroll.touches.touchstart.y)>swipeScroll.options.distance) {
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if(swipeScroll.touches.touchstart.y < swipeScroll.touches.touchmove.y) {
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swipeScroll.up();
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} else {
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swipeScroll.down();
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}
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}
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swipeScroll.touches.touchstart.y = -1;
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swipeScroll.touches.touchstart.x = -1;
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swipeScroll.touches.direction = "undetermined";
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}
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}
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default:
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break;
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}
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}
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}
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},
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down: function() {
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if(index<heights.length) {
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if(atBottom() && index<heights.length-1) {
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index++;
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//index, instant, callbacks, toTop
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animateScroll(index,false,true,false);
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} else {
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portHeight = getportHeight();
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if(Math.floor(elements[index].height()/portHeight)>interstitialIndex) {
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interstitialScroll(parseInt(heights[index])+(portHeight*interstitialIndex));
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interstitialIndex += 1;
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} else {
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interstitialScroll(parseInt(heights[index])+(elements[index].outerHeight()-portHeight));
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}
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}
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}
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},
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up: function() {
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if(index>=0) {
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if(atTop() && index>0) {
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index--;
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//index, instant, callbacks, toTop
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animateScroll(index,false,true,false);
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} else {
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if(interstitialIndex>2) {
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portHeight = getportHeight();
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interstitialIndex -= 1;
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interstitialScroll(parseInt(heights[index])+(portHeight*interstitialIndex));
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} else {
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interstitialIndex = 1;
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interstitialScroll(parseInt(heights[index]));
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}
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}
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}
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},
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init: function() {
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if (document.addEventListener && settings.touchScroll) {
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var eventListenerOptions = {
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passive: false
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};
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document.addEventListener('touchstart', swipeScroll.touchHandler, eventListenerOptions);
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document.addEventListener('touchmove', swipeScroll.touchHandler, eventListenerOptions);
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document.addEventListener('touchend', swipeScroll.touchHandler, eventListenerOptions);
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}
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}
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};
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util = {
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refresh:function(withCallback,scroll) {
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clearTimeout(timeoutId2);
|
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timeoutId2 = setTimeout(function() {
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//retain position
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sizePanels(true);
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//scroll, firstLoad
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calculatePositions(scroll,false);
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if(withCallback) {
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settings.afterResize();
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}
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},400);
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},
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handleUpdate:function() {
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//callbacks, scroll
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//changed from false,true to false,false
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util.refresh(false,false);
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},
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handleResize:function() {
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//callbacks, scroll
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util.refresh(true,false);
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},
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handleOrientation:function() {
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//callbacks, scroll
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util.refresh(true,true);
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}
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};
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settings = $.extend(settings, options);
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|
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//retain position
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sizePanels(false);
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calculatePositions(false,true);
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|
|
if(true===hasLocation) {
|
|
//index, instant, callbacks, toTop
|
|
animateScroll(index,false,true,true);
|
|
} else {
|
|
setTimeout(function() {
|
|
//instant,callbacks
|
|
manualScroll.calculateNearest(true,false);
|
|
},200);
|
|
}
|
|
if(heights.length) {
|
|
manualScroll.init();
|
|
swipeScroll.init();
|
|
|
|
$window.on("resize",util.handleResize);
|
|
if (document.addEventListener) {
|
|
window.addEventListener("orientationchange", util.handleOrientation, false);
|
|
}
|
|
}
|
|
function interstitialScroll(pos) {
|
|
if( $().velocity ) {
|
|
$(settings.target).stop().velocity('scroll', {
|
|
duration: settings.scrollSpeed,
|
|
easing: settings.easing,
|
|
offset: pos,
|
|
mobileHA: false
|
|
});
|
|
} else {
|
|
$(settings.target).stop().animate({
|
|
scrollTop: pos
|
|
}, settings.scrollSpeed,settings.easing);
|
|
}
|
|
}
|
|
|
|
function sizePanels(keepPosition) {
|
|
if(keepPosition) {
|
|
top = $window.scrollTop();
|
|
}
|
|
|
|
var selector = settings.section;
|
|
overflow = [];
|
|
if(settings.interstitialSection.length) {
|
|
selector += "," + settings.interstitialSection;
|
|
}
|
|
if(settings.scrollbars===false) {
|
|
settings.overflowScroll = false;
|
|
}
|
|
portHeight = getportHeight();
|
|
$(selector).each(function(i) {
|
|
var $this = $(this);
|
|
|
|
if(settings.setHeights) {
|
|
if($this.is(settings.interstitialSection)) {
|
|
overflow[i] = false;
|
|
} else {
|
|
if(($this.css("height","auto").outerHeight()<portHeight) || $this.css("overflow")==="hidden") {
|
|
$this.css({"height":portHeight});
|
|
|
|
overflow[i] = false;
|
|
} else {
|
|
|
|
$this.css({"height":$this.height()});
|
|
|
|
if(settings.overflowScroll) {
|
|
overflow[i] = true;
|
|
} else {
|
|
overflow[i] = false;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
if(($this.outerHeight()<portHeight) || (settings.overflowScroll===false)) {
|
|
overflow[i] = false;
|
|
} else {
|
|
overflow[i] = true;
|
|
}
|
|
}
|
|
});
|
|
if(keepPosition) {
|
|
$window.scrollTop(top);
|
|
}
|
|
}
|
|
function calculatePositions(scroll,firstLoad) {
|
|
var selector = settings.section;
|
|
if(settings.interstitialSection.length) {
|
|
selector += "," + settings.interstitialSection;
|
|
}
|
|
heights = [];
|
|
names = [];
|
|
elements = [];
|
|
$(selector).each(function(i){
|
|
var $this = $(this);
|
|
if(i>0) {
|
|
heights[i] = parseInt($this.offset().top) + settings.offset;
|
|
} else {
|
|
heights[i] = parseInt($this.offset().top);
|
|
}
|
|
if(settings.sectionName && $this.data(settings.sectionName)) {
|
|
names[i] = "#" + $this.data(settings.sectionName).toString().replace(/ /g,"-");
|
|
} else {
|
|
if($this.is(settings.interstitialSection)===false) {
|
|
names[i] = "#" + (i + 1);
|
|
} else {
|
|
names[i] = "#";
|
|
if(i===$(selector).length-1 && i>1) {
|
|
heights[i] = heights[i-1] + (parseInt($($(selector)[i-1]).outerHeight()) - parseInt($(window).height())) + parseInt($this.outerHeight());
|
|
}
|
|
}
|
|
}
|
|
elements[i] = $this;
|
|
try {
|
|
if($(names[i]).length && window.console) {
|
|
console.warn("Scrollify warning: Section names can't match IDs - this will cause the browser to anchor.");
|
|
}
|
|
} catch (e) {}
|
|
|
|
if(window.location.hash===names[i]) {
|
|
index = i;
|
|
hasLocation = true;
|
|
}
|
|
|
|
});
|
|
|
|
if(true===scroll) {
|
|
//index, instant, callbacks, toTop
|
|
animateScroll(index,false,false,false);
|
|
}
|
|
}
|
|
|
|
function atTop() {
|
|
if(!overflow[index]) {
|
|
return true;
|
|
}
|
|
top = $window.scrollTop();
|
|
if(top>parseInt(heights[index])) {
|
|
return false;
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
function atBottom() {
|
|
if(!overflow[index]) {
|
|
return true;
|
|
}
|
|
top = $window.scrollTop();
|
|
portHeight = getportHeight();
|
|
|
|
if(top<parseInt(heights[index])+(elements[index].outerHeight()-portHeight)-28) {
|
|
|
|
return false;
|
|
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
function move(panel,instant) {
|
|
var z = names.length;
|
|
for(;z>=0;z--) {
|
|
if(typeof panel === 'string') {
|
|
if (names[z]===panel) {
|
|
index = z;
|
|
//index, instant, callbacks, toTop
|
|
animateScroll(z,instant,true,true);
|
|
}
|
|
} else {
|
|
if(z===panel) {
|
|
index = z;
|
|
//index, instant, callbacks, toTop
|
|
animateScroll(z,instant,true,true);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
scrollify.move = function(panel) {
|
|
if(panel===undefined) {
|
|
return false;
|
|
}
|
|
if(panel.originalEvent) {
|
|
panel = $(this).attr("href");
|
|
}
|
|
move(panel,false);
|
|
};
|
|
scrollify.instantMove = function(panel) {
|
|
if(panel===undefined) {
|
|
return false;
|
|
}
|
|
move(panel,true);
|
|
};
|
|
scrollify.next = function() {
|
|
if(index<names.length) {
|
|
index += 1;
|
|
//index, instant, callbacks, toTop
|
|
animateScroll(index,false,true,true);
|
|
}
|
|
};
|
|
scrollify.previous = function() {
|
|
if(index>0) {
|
|
index -= 1;
|
|
//index, instant, callbacks, toTop
|
|
animateScroll(index,false,true,true);
|
|
}
|
|
};
|
|
scrollify.instantNext = function() {
|
|
if(index<names.length) {
|
|
index += 1;
|
|
//index, instant, callbacks, toTop
|
|
animateScroll(index,true,true,true);
|
|
}
|
|
};
|
|
scrollify.instantPrevious = function() {
|
|
if(index>0) {
|
|
index -= 1;
|
|
//index, instant, callbacks, toTop
|
|
animateScroll(index,true,true,true);
|
|
}
|
|
};
|
|
scrollify.destroy = function() {
|
|
if(!initialised) {
|
|
return false;
|
|
}
|
|
if(settings.setHeights) {
|
|
$(settings.section).each(function() {
|
|
$(this).css("height","auto");
|
|
});
|
|
}
|
|
$window.off("resize",util.handleResize);
|
|
if(settings.scrollbars) {
|
|
$window.off('mousedown', manualScroll.handleMousedown);
|
|
$window.off('mouseup', manualScroll.handleMouseup);
|
|
$window.off('scroll', manualScroll.handleScroll);
|
|
}
|
|
$window.off(wheelEvent,manualScroll.wheelHandler);
|
|
$window.off('keydown', manualScroll.keyHandler);
|
|
|
|
if (document.addEventListener && settings.touchScroll) {
|
|
document.removeEventListener('touchstart', swipeScroll.touchHandler, false);
|
|
document.removeEventListener('touchmove', swipeScroll.touchHandler, false);
|
|
document.removeEventListener('touchend', swipeScroll.touchHandler, false);
|
|
}
|
|
heights = [];
|
|
names = [];
|
|
elements = [];
|
|
overflow = [];
|
|
};
|
|
scrollify.update = function() {
|
|
if(!initialised) {
|
|
return false;
|
|
}
|
|
util.handleUpdate();
|
|
};
|
|
scrollify.current = function() {
|
|
return elements[index];
|
|
};
|
|
scrollify.currentIndex = function() {
|
|
return index;
|
|
};
|
|
scrollify.disable = function() {
|
|
disabled = true;
|
|
};
|
|
scrollify.enable = function() {
|
|
disabled = false;
|
|
if (initialised) {
|
|
//instant,callbacks
|
|
manualScroll.calculateNearest(false,false);
|
|
}
|
|
};
|
|
scrollify.isDisabled = function() {
|
|
return disabled;
|
|
};
|
|
scrollify.setOptions = function(updatedOptions) {
|
|
if(!initialised) {
|
|
return false;
|
|
}
|
|
if(typeof updatedOptions === "object") {
|
|
settings = $.extend(settings, updatedOptions);
|
|
util.handleUpdate();
|
|
} else if(window.console) {
|
|
console.warn("Scrollify warning: setOptions expects an object.");
|
|
}
|
|
};
|
|
$.scrollify = scrollify;
|
|
return scrollify;
|
|
}));
|