828 lines
23 KiB
JavaScript
828 lines
23 KiB
JavaScript
/*!
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* Swipe 2.2.14
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*
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* Brad Birdsall
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* Copyright 2013, MIT License
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*
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*/
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// if the module has no dependencies, the above pattern can be simplified to
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// eslint-disable-next-line no-extra-semi
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; (function (root, factory) {
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// eslint-disable-next-line no-undef
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if (typeof define === 'function' && define.amd) {
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// AMD. Register as an anonymous module.
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// eslint-disable-next-line no-undef
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define([], function () {
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root.Swipe = factory();
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return root.Swipe;
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});
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} else if (typeof module === 'object' && module.exports) {
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// Node. Does not work with strict CommonJS, but
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// only CommonJS-like environments that support module.exports,
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// like Node.
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module.exports = factory();
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} else {
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// Browser globals
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root.Swipe = factory();
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}
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}(this, function () {
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// Establish the root object, `window` (`self`) in the browser, `global`
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// on the server, or `this` in some virtual machines. We use `self`
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// instead of `window` for `WebWorker` support.
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var root = typeof self == 'object' && self.self === self && self ||
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typeof global == 'object' && global.global === global && global ||
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this;
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var _document = root.document;
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function Swipe(container, options) {
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'use strict';
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options = options || {};
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// setup initial vars
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var start = {};
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var delta = {};
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var isScrolling;
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// setup auto slideshow
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var delay = options.auto || 0;
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var interval;
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var disabled = false;
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// utilities
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// simple no operation function
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var noop = function () { };
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// offload a functions execution
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var offloadFn = function (fn) { setTimeout(fn || noop, 0); };
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// Returns a function, that, as long as it continues to be invoked, will not
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// be triggered.
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var throttle = function (fn, threshhold) {
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threshhold = threshhold || 100;
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var timeout = null;
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function cancel() {
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if (timeout) clearTimeout(timeout);
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}
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function throttledFn() {
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var context = this;
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var args = arguments;
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cancel();
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timeout = setTimeout(function () {
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timeout = null;
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fn.apply(context, args);
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}, threshhold);
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}
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// allow remove throttled timeout
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throttledFn.cancel = cancel;
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return throttledFn;
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};
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function getScrollbarWidth() {
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return root.innerWidth - _document.documentElement.clientWidth;
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}
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// check whether event is cancelable
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var isCancelable = function (event) {
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if (!event) return false;
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return typeof event.cancelable !== 'boolean' || event.cancelable;
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};
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// check browser capabilities
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var browser = {
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addEventListener: !!root.addEventListener,
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passiveEvents: (function () {
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// Test via a getter in the options object to see if the passive property is accessed
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var supportsPassive = false;
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try {
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var opts = Object.defineProperty({}, 'passive', {
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// eslint-disable-next-line getter-return
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get: function () {
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supportsPassive = true;
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}
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});
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root.addEventListener('testEvent', null, opts);
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root.removeEventListener('testEvent', null, opts);
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}
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catch (e) {
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supportsPassive = false;
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}
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return supportsPassive;
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})(),
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// eslint-disable-next-line no-undef
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touch: ('ontouchstart' in root) || root.DocumentTouch && _document instanceof DocumentTouch,
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transitions: (function (temp) {
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var props = ['transitionProperty', 'WebkitTransition', 'MozTransition', 'OTransition', 'msTransition'];
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for (var i in props) {
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if (temp.style[props[i]] !== undefined) {
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return true;
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}
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}
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return false;
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})(_document.createElement('swipe'))
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};
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// quit if no root element
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if (!container) return;
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var element = container.children[0];
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var slides, slidePos, width, length;
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var index = parseInt(options.startSlide, 10) || 0;
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var speed = options.speed || 300;
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options.continuous = options.continuous !== undefined ? options.continuous : true;
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// check text direction
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var slideDir = (function (el, prop, dir) {
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if (el.currentStyle) {
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dir = el.currentStyle[prop];
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} else if (root.getComputedStyle) {
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dir = root.getComputedStyle(el, null).getPropertyValue(prop);
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}
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return 'rtl' === dir ? 'right' : 'left';
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})(container, 'direction');
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// AutoRestart option: auto restart slideshow after user's touch event
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options.autoRestart = options.autoRestart !== undefined ? options.autoRestart : false;
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// throttled setup
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var throttledSetup = throttle(setup);
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// setup event capturing
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var events = {
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handleEvent: function (event) {
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if (disabled) return;
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switch (event.type) {
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case 'mousedown':
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case 'touchstart': this.start(event); break;
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case 'mousemove':
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case 'touchmove': this.move(event); break;
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case 'mouseup':
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case 'mouseleave':
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case 'touchend': this.end(event); break;
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case 'webkitTransitionEnd':
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case 'msTransitionEnd':
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case 'oTransitionEnd':
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case 'otransitionend':
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case 'transitionend': this.transitionEnd(event); break;
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case 'resize': throttledSetup(); break;
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}
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if (options.stopPropagation) {
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event.stopPropagation();
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}
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},
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start: function (event) {
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var touches;
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if (isMouseEvent(event)) {
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touches = event;
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event.preventDefault(); // For desktop Safari drag
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} else {
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touches = event.touches[0];
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}
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// measure start values
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start = {
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// get initial touch coords
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x: touches.pageX,
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y: touches.pageY,
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// store time to determine touch duration
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time: +new Date()
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};
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// used for testing first move event
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isScrolling = undefined;
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// reset delta and end measurements
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delta = {};
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// attach touchmove and touchend listeners
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if (isMouseEvent(event)) {
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element.addEventListener('mousemove', this, false);
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element.addEventListener('mouseup', this, false);
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element.addEventListener('mouseleave', this, false);
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} else {
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element.addEventListener('touchmove', this, browser.passiveEvents ? { passive: false } : false);
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element.addEventListener('touchend', this, false);
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}
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},
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move: function (event) {
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var touches;
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if (isMouseEvent(event)) {
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touches = event;
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} else {
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// ensure swiping with one touch and not pinching
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if (event.touches.length > 1 || event.scale && event.scale !== 1) {
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return;
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}
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// we can disable scrolling unless it is already in progress
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if (options.disableScroll && isCancelable(event)) {
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event.preventDefault();
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}
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touches = event.touches[0];
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}
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// measure change in x and y
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delta = {
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x: touches.pageX - start.x,
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y: touches.pageY - start.y
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};
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// determine if scrolling test has run - one time test
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if (typeof isScrolling === 'undefined') {
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isScrolling = !!(isScrolling || Math.abs(delta.x) < Math.abs(delta.y));
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}
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// if user is not trying to scroll vertically
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if (!isScrolling) {
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// if it is not already scrolling
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if (isCancelable(event)) {
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// prevent native scrolling
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event.preventDefault();
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}
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// stop slideshow
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stop();
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// increase resistance if first or last slide
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if (options.continuous) { // we don't add resistance at the end
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translate(circle(index - 1), delta.x + slidePos[circle(index - 1)], 0);
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translate(index, delta.x + slidePos[index], 0);
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translate(circle(index + 1), delta.x + slidePos[circle(index + 1)], 0);
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} else {
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delta.x =
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delta.x /
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((!index && delta.x > 0 || // if first slide and sliding left
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index === slides.length - 1 && // or if last slide and sliding right
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delta.x < 0 // and if sliding at all
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) ?
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(Math.abs(delta.x) / width + 1) // determine resistance level
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: 1); // no resistance if false
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// translate 1:1
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translate(index - 1, delta.x + slidePos[index - 1], 0);
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translate(index, delta.x + slidePos[index], 0);
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translate(index + 1, delta.x + slidePos[index + 1], 0);
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}
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}
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},
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end: function (event) {
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// measure duration
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var duration = +new Date() - start.time;
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// determine if slide attempt triggers next/prev slide
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var isValidSlide =
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Number(duration) < 250 && // if slide duration is less than 250ms
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Math.abs(delta.x) > 20 || // and if slide amt is greater than 20px
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Math.abs(delta.x) > width / 2; // or if slide amt is greater than half the width
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// determine if slide attempt is past start and end
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var isPastBounds =
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!index && delta.x > 0 || // if first slide and slide amt is greater than 0
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index === slides.length - 1 && delta.x < 0; // or if last slide and slide amt is less than 0
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if (options.continuous) {
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isPastBounds = false;
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}
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// OLD determine direction of swipe (true:right, false:left)
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// determine direction of swipe (1: backward, -1: forward)
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var direction = Math.abs(delta.x) / delta.x;
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// if not scrolling vertically
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if (!isScrolling) {
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if (isValidSlide && !isPastBounds) {
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// if we're moving right
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if (direction < 0) {
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if (options.continuous) { // we need to get the next in this direction in place
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move(circle(index - 1), -width, 0);
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move(circle(index + 2), width, 0);
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} else {
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move(index - 1, -width, 0);
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}
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move(index, slidePos[index] - width, speed);
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move(circle(index + 1), slidePos[circle(index + 1)] - width, speed);
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index = circle(index + 1);
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} else {
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if (options.continuous) { // we need to get the next in this direction in place
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move(circle(index + 1), width, 0);
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move(circle(index - 2), -width, 0);
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} else {
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move(index + 1, width, 0);
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}
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move(index, slidePos[index] + width, speed);
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move(circle(index - 1), slidePos[circle(index - 1)] + width, speed);
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index = circle(index - 1);
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}
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runCallback(getPos(), slides[index], direction);
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} else {
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if (options.continuous) {
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move(circle(index - 1), -width, speed);
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move(index, 0, speed);
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move(circle(index + 1), width, speed);
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} else {
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move(index - 1, -width, speed);
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move(index, 0, speed);
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move(index + 1, width, speed);
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}
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}
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}
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// kill touchmove and touchend event listeners until touchstart called again
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if (isMouseEvent(event)) {
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element.removeEventListener('mousemove', events, false);
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element.removeEventListener('mouseup', events, false);
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element.removeEventListener('mouseleave', events, false);
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} else {
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element.removeEventListener('touchmove', events, browser.passiveEvents ? { passive: false } : false);
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element.removeEventListener('touchend', events, false);
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}
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},
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transitionEnd: function (event) {
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var currentIndex = parseInt(event.target.getAttribute('data-index'), 10);
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if (currentIndex === index) {
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if (delay || options.autoRestart) restart();
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runTransitionEnd(getPos(), slides[index]);
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}
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}
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};
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// trigger setup
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setup();
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// start auto slideshow if applicable
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begin();
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// Expose the Swipe API
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return {
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// initialize
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setup: setup,
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// go to slide
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slide: function (to, speed) {
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stop();
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slide(to, speed);
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},
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// move to previous
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prev: function () {
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stop();
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prev();
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},
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// move to next
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next: function () {
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stop();
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next();
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},
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// Restart slideshow
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restart: restart,
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// cancel slideshow
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stop: stop,
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// return current index position
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getPos: getPos,
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// disable slideshow
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disable: disable,
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// enable slideshow
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enable: enable,
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// return total number of slides
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getNumSlides: function () { return length; },
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// completely remove swipe
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kill: kill
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};
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// remove all event listeners
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function detachEvents() {
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if (browser.addEventListener) {
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// remove current event listeners
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element.removeEventListener('touchstart', events, browser.passiveEvents ? { passive: true } : false);
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element.removeEventListener('mousedown', events, false);
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element.removeEventListener('webkitTransitionEnd', events, false);
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element.removeEventListener('msTransitionEnd', events, false);
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element.removeEventListener('oTransitionEnd', events, false);
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element.removeEventListener('otransitionend', events, false);
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element.removeEventListener('transitionend', events, false);
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root.removeEventListener('resize', events, false);
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} else {
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root.onresize = null;
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}
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}
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// add event listeners
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function attachEvents() {
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if (browser.addEventListener) {
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// set touchstart event on element
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if (browser.touch) {
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element.addEventListener('touchstart', events, browser.passiveEvents ? { passive: true } : false);
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}
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if (options.draggable) {
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element.addEventListener('mousedown', events, false);
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}
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if (browser.transitions) {
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element.addEventListener('webkitTransitionEnd', events, false);
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element.addEventListener('msTransitionEnd', events, false);
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element.addEventListener('oTransitionEnd', events, false);
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element.addEventListener('otransitionend', events, false);
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element.addEventListener('transitionend', events, false);
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}
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// set resize event on window
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root.addEventListener('resize', events, false);
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} else {
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root.onresize = throttledSetup; // to play nice with old IE
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}
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}
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// clone nodes when there is only two slides
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function cloneNode(el) {
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var clone = el.cloneNode(true);
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element.appendChild(clone);
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// tag these slides as clones (to remove them on kill)
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clone.setAttribute('data-cloned', true);
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// Remove id from element
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clone.removeAttribute('id');
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}
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function setup(opts) {
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// Overwrite options if necessary
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if (opts != null) {
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for (var prop in opts) {
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options[prop] = opts[prop];
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}
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}
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// cache slides
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slides = element.children;
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length = slides.length;
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// slides length correction, minus cloned slides
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for (var i = 0; i < slides.length; i++) {
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if (slides[i].getAttribute('data-cloned')) length--;
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}
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// set continuous to false if only one slide
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if (slides.length < 2) {
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options.continuous = false;
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}
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// special case if two slides
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if (browser.transitions && options.continuous && slides.length < 3) {
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cloneNode(slides[0]);
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cloneNode(slides[1]);
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slides = element.children;
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}
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// adjust style on rtl
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if ('right' === slideDir) {
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for (var j = 0; j < slides.length; j++) {
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slides[j].style.float = 'right';
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}
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}
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// create an array to store current positions of each slide
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slidePos = new Array(slides.length);
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// determine width of each slide
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//width = container.getBoundingClientRect().width || container.offsetWidth;
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width = root.innerWidth - getScrollbarWidth();
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element.style.width = (slides.length * width * 2) + 'px';
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// stack elements
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var pos = slides.length;
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while (pos--) {
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var slide = slides[pos];
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slide.style.width = width + 'px';
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slide.setAttribute('data-index', pos);
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if (browser.transitions) {
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slide.style[slideDir] = (pos * -width) + 'px';
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move(pos, index > pos ? -width : (index < pos ? width : 0), 0);
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}
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}
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// reposition elements before and after index
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if (options.continuous && browser.transitions) {
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move(circle(index - 1), -width, 0);
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move(circle(index + 1), width, 0);
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}
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if (!browser.transitions) {
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element.style[slideDir] = (index * -width) + 'px';
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}
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container.style.visibility = 'visible';
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// reinitialize events
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detachEvents();
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attachEvents();
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}
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function prev() {
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if (disabled) return;
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if (options.continuous) {
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slide(index - 1);
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} else if (index) {
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slide(index - 1);
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}
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}
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function next() {
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if (disabled) return;
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if (options.continuous) {
|
|
slide(index + 1);
|
|
} else if (index < slides.length - 1) {
|
|
slide(index + 1);
|
|
}
|
|
}
|
|
|
|
function runCallback(pos, index, dir) {
|
|
if (options.callback) {
|
|
options.callback(pos, index, dir);
|
|
}
|
|
}
|
|
|
|
function runTransitionEnd(pos, index) {
|
|
if (options.transitionEnd) {
|
|
options.transitionEnd(pos, index);
|
|
}
|
|
}
|
|
|
|
function circle(index) {
|
|
|
|
// a simple positive modulo using slides.length
|
|
return (slides.length + (index % slides.length)) % slides.length;
|
|
}
|
|
|
|
function getPos() {
|
|
// Fix for the clone issue in the event of 2 slides
|
|
var currentIndex = index;
|
|
|
|
if (currentIndex >= length) {
|
|
currentIndex = currentIndex - length;
|
|
}
|
|
|
|
return currentIndex;
|
|
}
|
|
|
|
function slide(to, slideSpeed) {
|
|
|
|
// ensure to is of type 'number'
|
|
to = typeof to !== 'number' ? parseInt(to, 10) : to;
|
|
|
|
// do nothing if already on requested slide
|
|
if (index === to) return;
|
|
|
|
if (browser.transitions) {
|
|
|
|
var direction = Math.abs(index - to) / (index - to); // 1: backward, -1: forward
|
|
|
|
// get the actual position of the slide
|
|
if (options.continuous) {
|
|
var natural_direction = direction;
|
|
direction = -slidePos[circle(to)] / width;
|
|
|
|
// if going forward but to < index, use to = slides.length + to
|
|
// if going backward but to > index, use to = -slides.length + to
|
|
if (direction !== natural_direction) {
|
|
to = -direction * slides.length + to;
|
|
}
|
|
|
|
}
|
|
|
|
var diff = Math.abs(index - to) - 1;
|
|
|
|
// move all the slides between index and to in the right direction
|
|
while (diff--) {
|
|
move(circle((to > index ? to : index) - diff - 1), width * direction, 0);
|
|
}
|
|
|
|
to = circle(to);
|
|
|
|
move(index, width * direction, slideSpeed || speed);
|
|
move(to, 0, slideSpeed || speed);
|
|
|
|
if (options.continuous) { // we need to get the next in place
|
|
move(circle(to - direction), -(width * direction), 0);
|
|
}
|
|
|
|
} else {
|
|
|
|
to = circle(to);
|
|
animate(index * -width, to * -width, slideSpeed || speed);
|
|
// no fallback for a circular continuous if the browser does not accept transitions
|
|
}
|
|
|
|
index = to;
|
|
offloadFn(function () {
|
|
runCallback(getPos(), slides[index], direction);
|
|
});
|
|
}
|
|
|
|
function move(index, dist, speed) {
|
|
translate(index, dist, speed);
|
|
slidePos[index] = dist;
|
|
}
|
|
|
|
function translate(index, dist, speed) {
|
|
|
|
var slide = slides[index];
|
|
var style = slide && slide.style;
|
|
|
|
if (!style) return;
|
|
|
|
style.webkitTransitionDuration =
|
|
style.MozTransitionDuration =
|
|
style.msTransitionDuration =
|
|
style.OTransitionDuration =
|
|
style.transitionDuration = speed + 'ms';
|
|
|
|
style.webkitTransform =
|
|
style.msTransform =
|
|
style.MozTransform =
|
|
style.OTransform =
|
|
style.transform = 'translateX(' + dist + 'px)';
|
|
}
|
|
|
|
function animate(from, to, speed) {
|
|
|
|
// if not an animation, just reposition
|
|
if (!speed) {
|
|
element.style[slideDir] = to + 'px';
|
|
return;
|
|
}
|
|
|
|
var start = +new Date();
|
|
|
|
var timer = setInterval(function () {
|
|
var timeElap = +new Date() - start;
|
|
|
|
if (timeElap > speed) {
|
|
|
|
element.style[slideDir] = to + 'px';
|
|
|
|
if (delay || options.autoRestart) restart();
|
|
|
|
runTransitionEnd(getPos(), slides[index]);
|
|
|
|
clearInterval(timer);
|
|
|
|
return;
|
|
}
|
|
|
|
element.style[slideDir] = (((to - from) * (Math.floor((timeElap / speed) * 100) / 100)) + from) + 'px';
|
|
}, 4);
|
|
|
|
}
|
|
|
|
function begin() {
|
|
delay = options.auto || 0;
|
|
if (delay) interval = setTimeout(next, delay);
|
|
}
|
|
|
|
function stop() {
|
|
delay = 0;
|
|
clearTimeout(interval);
|
|
}
|
|
|
|
function restart() {
|
|
stop();
|
|
begin();
|
|
}
|
|
|
|
function disable() {
|
|
stop();
|
|
disabled = true;
|
|
}
|
|
|
|
function enable() {
|
|
disabled = false;
|
|
restart();
|
|
}
|
|
|
|
function isMouseEvent(e) {
|
|
return /^mouse/.test(e.type);
|
|
}
|
|
|
|
function kill() {
|
|
// cancel slideshow
|
|
stop();
|
|
|
|
// remove inline styles
|
|
container.style.visibility = '';
|
|
|
|
// reset element
|
|
element.style.width = '';
|
|
element.style[slideDir] = '';
|
|
|
|
// reset slides
|
|
var pos = slides.length;
|
|
while (pos--) {
|
|
|
|
if (browser.transitions) {
|
|
translate(pos, 0, 0);
|
|
}
|
|
|
|
var slide = slides[pos];
|
|
|
|
// if the slide is tagged as clone, remove it
|
|
if (slide.getAttribute('data-cloned')) {
|
|
var _parent = slide.parentElement;
|
|
_parent.removeChild(slide);
|
|
}
|
|
|
|
// remove styles
|
|
slide.style.width = '';
|
|
slide.style[slideDir] = '';
|
|
|
|
slide.style.webkitTransitionDuration =
|
|
slide.style.MozTransitionDuration =
|
|
slide.style.msTransitionDuration =
|
|
slide.style.OTransitionDuration =
|
|
slide.style.transitionDuration = '';
|
|
|
|
slide.style.webkitTransform =
|
|
slide.style.msTransform =
|
|
slide.style.MozTransform =
|
|
slide.style.OTransform = '';
|
|
|
|
// remove custom attributes (?)
|
|
// slide.removeAttribute('data-index');
|
|
}
|
|
|
|
// remove all events
|
|
detachEvents();
|
|
|
|
// remove throttled function timeout
|
|
throttledSetup.cancel();
|
|
}
|
|
}
|
|
|
|
if (root.jQuery || root.Zepto) {
|
|
(function ($) {
|
|
$.fn.Swipe = function (params) {
|
|
return this.each(function () {
|
|
$(this).data('Swipe', new Swipe($(this)[0], params));
|
|
});
|
|
};
|
|
})(root.jQuery || root.Zepto);
|
|
}
|
|
|
|
return Swipe;
|
|
})); |