632 lines
15 KiB
JavaScript
Executable File
632 lines
15 KiB
JavaScript
Executable File
window.shower = (function(window, document, undefined) {
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var shower = {},
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url = window.location,
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body = document.body,
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slides = document.querySelectorAll('.slide'),
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progress = document.querySelector('div.progress div'),
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slideList = [],
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timer,
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isHistoryApiSupported = !!(window.history && history.pushState),
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l = slides.length, i;
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/**
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* Get value at named data store for the DOM element.
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* @private
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* @param {domElem} element
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* @param {string} name
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* @returns {string}
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*/
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shower._getData = function(element, name) {
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return element.dataset ? element.dataset[name] : element.getAttribute('data-' + name);
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}
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for (i = 0; i < l; i++) {
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// Slide ID's are optional. In case of missing ID we set it to the
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// slide number
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if ( ! slides[i].id) {
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slides[i].id = i + 1;
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}
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slideList.push({
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id: slides[i].id,
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hasInnerNavigation: null !== slides[i].querySelector('.next'),
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hasTiming: (shower._getData(slides[i], 'timing') && shower._getData(slides[i], 'timing').indexOf(':') !== -1)
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});
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}
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/**
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* Get slide scale value
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* @private
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* @returns {String}
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*/
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shower._getTransform = function() {
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var denominator = Math.max(
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body.clientWidth / window.innerWidth,
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body.clientHeight / window.innerHeight
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);
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return 'scale(' + (1 / denominator) + ')';
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};
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/**
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* Set CSS transform with prefixes to body
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* @private
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* @returns {true}
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*/
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shower._applyTransform = function(transform) {
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body.style.WebkitTransform = transform;
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body.style.MozTransform = transform;
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body.style.msTransform = transform;
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body.style.OTransform = transform;
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body.style.transform = transform;
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return true;
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};
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/**
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* Show next slide. If slide is last returns false, otherwise return slide
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* number which been shown.
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* @returns {number|false}
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*/
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shower.next = function () {
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var currentSlideNumber = shower.getCurrentSlideNumber(),
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ret;
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// Only go to next slide if current slide have no inner
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// navigation or inner navigation is fully shown
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// NOTE: But first of all check if there is no current slide
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if (
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-1 === currentSlideNumber ||
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!slideList[currentSlideNumber].hasInnerNavigation ||
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-1 === shower.increaseInnerNavigation(currentSlideNumber)
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) {
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shower.go(currentSlideNumber + 1);
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// slides starts from 0
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ret = currentSlideNumber + 2;
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} else {
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ret = false;
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}
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return ret;
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};
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/**
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* Show previous slide. If slide is first returns false, otherwise return slide
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* number which been shown.
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* @returns {number|false}
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*/
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shower.previous = function () {
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var currentSlideNumber = shower.getCurrentSlideNumber(),
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ret;
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// slides starts from 0
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if (currentSlideNumber > 0) {
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ret = currentSlideNumber;
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shower.go(currentSlideNumber - 1);
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} else {
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ret = false;
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}
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return ret;
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};
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/**
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* Show first slide.
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* @returns {number}
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*/
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shower.first = function() {
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return shower.go(0);
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};
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/**
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* Show last slide.
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* @returns {number}
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*/
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shower.last = function() {
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return shower.go(slideList.length - 1);
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};
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/**
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* Switch to slide view.
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* @returns {number}
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*/
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shower.enterSlideMode = function() {
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// @TODO: check if it's already in slide mode...
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body.classList.remove('list');
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body.classList.add('full');
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return shower._applyTransform(shower._getTransform());
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};
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/**
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* Switch to list view.
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* @returns {number}
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*/
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shower.enterListMode = function() {
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// @TODO: check if it's already in list mode...
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body.classList.remove('full');
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body.classList.add('list');
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return shower._applyTransform('none');
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};
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// @TODO: add method shower.toggleMode()
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/**
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* Get current slide number. Starts from zero. Warning: when in url you have
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* slide number 1 this method will return 0.
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* If something wrong return -1.
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* @returns {number}
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*/
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shower.getCurrentSlideNumber = function() {
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var i = slideList.length - 1,
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currentSlideId = url.hash.substr(1);
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// As fast as you can ;-)
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// http://jsperf.com/for-vs-foreach/46
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for (; i >= 0; --i) {
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if (currentSlideId === slideList[i].id) {
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return i;
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}
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}
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return -1;
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};
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/**
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* Check if arg is number.
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* @private
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* @param {number|whatelse} arg Any type
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* @returns {boolean}
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*/
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shower._isNumber = function(arg) {
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if(! ( ! isNaN(parseFloat(arg)) && isFinite(arg))) {
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return false;
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}
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return true;
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};
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/**
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* Scroll to slide.
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* @param {number} slideNumber slide number (sic!)
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* @returns {undefined|boolean}
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*/
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shower.scrollToSlide = function(slideNumber) {
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var currentSlide,
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ret;
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if( ! shower._isNumber(slideNumber)) {
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throw new Error('Gimme slide number as number, baby!');
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}
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if( ! shower.isListMode()) {
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throw new Error('You can\'t to scroll cause you in slide mode. Please, switch to list mode.');
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}
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// @TODO: WTF?
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if (-1 === slideNumber) {
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return;
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}
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if (slideList[slideNumber]) {
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currentSlide = document.getElementById(slideList[slideNumber].id);
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window.scrollTo(0, currentSlide.offsetTop);
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ret = true;
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} else {
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throw new Error('There is no slide with number ' + slideNumber);
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}
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return ret;
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};
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/**
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* Chech if it's list mode.
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* @returns {boolean}
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*/
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shower.isListMode = function() {
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return isHistoryApiSupported ? 'full' !== url.search.substr(1) : body.classList.contains('list');
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};
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/**
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* Normalize slide number.
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* @private
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* @param {number} slideNumber slide number (sic!)
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* @returns {number}
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*/
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shower._normalizeSlideNumber = function(slideNumber) {
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if( ! shower._isNumber(slideNumber)) {
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throw new Error('Gimme slide number as number, baby!');
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}
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if (slideNumber < 0) {
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slideNumber = 0;
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}
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if (slideNumber >= slideList.length) {
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slideNumber = slideList.length - 1;
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}
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return slideNumber;
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};
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/**
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* Update progress bar.
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* @param {number} slideNumber slide number (sic!)
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* @returns {boolean}
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*/
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shower.updateProgress = function(slideNumber) {
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// if progress bar doesn't exist
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if (null === progress) {
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return false;
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}
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if( ! shower._isNumber(slideNumber)) {
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throw new Error('Gimme slide number as number, baby!');
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}
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progress.style.width = (100 / (slideList.length - 1) * shower._normalizeSlideNumber(slideNumber)).toFixed(2) + '%';
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return true;
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};
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/**
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* Update current and passed slides.
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* @param {number} slideNumber slide number (sic!)
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* @returns {boolean}
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*/
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shower.updateCurrentAndPassedSlides = function(slideNumber) {
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var i,
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slide,
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l = slideList.length;
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slideNumber = shower._normalizeSlideNumber(slideNumber);
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if( ! shower._isNumber(slideNumber)) {
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throw new Error('Gimme slide number as number, baby!');
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}
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for (i = 0; i < l; ++i) {
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slide = document.getElementById(slideList[i].id);
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if (i < slideNumber) {
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slide.classList.remove('current');
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slide.classList.add('passed');
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} else if (i > slideNumber) {
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slide.classList.remove('passed');
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slide.classList.remove('current');
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} else {
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slide.classList.remove('passed');
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slide.classList.add('current');
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}
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}
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return true;
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};
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/**
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* Get slide hash.
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* @param {number} slideNumber slide number (sic!). Attention: starts from zero.
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* @returns {boolean}
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*/
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shower.getSlideHash = function(slideNumber) {
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if( ! shower._isNumber(slideNumber)) {
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throw new Error('Gimme slide number as number, baby!');
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}
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slideNumber = shower._normalizeSlideNumber(slideNumber);
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return '#' + slideList[slideNumber].id;
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};
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/**
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* Go to slide number...
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* @param {number} slideNumber slide number (sic!). Attention: starts from zero.
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* @returns {number}
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*/
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shower.go = function(slideNumber) {
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if( ! shower._isNumber(slideNumber)) {
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throw new Error('Gimme slide number as number, baby!');
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}
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url.hash = shower.getSlideHash(slideNumber);
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if ( ! shower.isListMode()) {
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shower.updateProgress(slideNumber);
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shower.updateCurrentAndPassedSlides(slideNumber);
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}
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return slideNumber;
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};
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/**
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* Get containing slide id.
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* @private
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* @param {domElem} el
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* @returns {string}
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*/
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shower._getContainingSlideId = function(el) {
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while ('BODY' !== el.nodeName && 'HTML' !== el.nodeName) {
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if (el.classList.contains('slide')) {
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return el.id;
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} else {
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el = el.parentNode;
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}
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}
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return '';
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};
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/**
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* Dispatch single slide mode.
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* @TODO: Renaming needed? Or just some handlers rewriting?
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* @private
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* @param {domElem} e
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* @returns {undefined}
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*/
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shower._dispatchSingleSlideMode = function(e) {
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// Process links
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// @TODO: presentation links support
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if ('A' === e.target.nodeName) {
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e.preventDefault();
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window.open(e.target.getAttribute('href'));
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return;
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}
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var slideId = shower._getContainingSlideId(e.target);
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if ('' !== slideId && shower.isListMode()) {
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e.preventDefault();
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// NOTE: we should update hash to get things work properly
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url.hash = '#' + slideId;
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if (isHistoryApiSupported)
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history.replaceState(null, null, url.pathname + '?full#' + slideId);
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shower.enterSlideMode();
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shower.updateProgress(shower.getCurrentSlideNumber());
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shower.updateCurrentAndPassedSlides(shower.getCurrentSlideNumber());
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shower.runSlideshowIfPresented(shower.getCurrentSlideNumber());
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}
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return;
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};
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/**
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* Run slide show in presented.
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* @param {number} slideNumber
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* @returns {undefined}
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*/
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shower.runSlideshowIfPresented = function(slideNumber) {
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if( ! shower._isNumber(slideNumber)) {
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throw new Error('Gimme slide number as number, baby!');
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}
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slideNumber = shower._normalizeSlideNumber(slideNumber);
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clearTimeout(timer);
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if (slideList[slideNumber].hasTiming) {
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// Compute number of milliseconds from format "X:Y", where X is
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// number of minutes, and Y is number of seconds
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var timing = shower._getData(document.getElementById(slideList[slideNumber].id), 'timing').split(':');
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timing = parseInt(timing[0], 10) * 60 * 1000 + parseInt(timing[1], 10) * 1000;
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timer = setTimeout(function() {
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shower.go(slideNumber + 1);
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shower.runSlideshowIfPresented(slideNumber + 1);
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},
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timing);
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}
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};
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/**
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* Increases inner navigation by adding 'active' class to next inactive inner navigation item
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* @param {number} slideNumber
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* @returns {number}
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*/
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shower.increaseInnerNavigation = function(slideNumber) {
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var nextNodes,
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node,
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ret = -1;
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if( ! shower._isNumber(slideNumber)) {
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throw new Error('Gimme slide number as number, baby!');
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}
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// If inner navigation in this slide...
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if (slideList[slideNumber].hasInnerNavigation) {
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nextNodes = document.getElementById(slideList[slideNumber].id).querySelectorAll('.next:not(.active)');
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if (0 !== nextNodes.length) {
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node = nextNodes[0];
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node.classList.add('active');
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ret = nextNodes.length - 1;
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}
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}
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return ret;
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};
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// Event handlers
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window.addEventListener('DOMContentLoaded', function () {
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if ( ! shower.isListMode()) {
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// "?full" is present without slide hash, so we should display first slide
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if (-1 === shower.getCurrentSlideNumber()) {
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if (isHistoryApiSupported)
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history.replaceState(null, null, url.pathname + '?full' + shower.getSlideHash(0));
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}
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shower.enterSlideMode();
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shower.updateProgress(shower.getCurrentSlideNumber());
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shower.updateCurrentAndPassedSlides(shower.getCurrentSlideNumber());
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shower.runSlideshowIfPresented(shower.getCurrentSlideNumber());
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}
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}, false);
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window.addEventListener('popstate', function (e) {
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if (shower.isListMode()) {
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shower.enterListMode();
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shower.scrollToSlide(shower.getCurrentSlideNumber());
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} else {
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shower.enterSlideMode();
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}
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}, false);
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window.addEventListener('resize', function (e) {
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if ( ! shower.isListMode()) {
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shower._applyTransform(shower._getTransform());
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}
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}, false);
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document.addEventListener('keydown', function (e) {
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// Shortcut for alt, ctrl and meta keys
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if (e.altKey || e.ctrlKey || e.metaKey) { return; }
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var currentSlideNumber = shower.getCurrentSlideNumber(),
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innerNavigationCompleted = true;
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switch (e.which) {
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case 116: // F5
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e.preventDefault();
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if (shower.isListMode()) {
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var slideNumber = e.shiftKey ? currentSlideNumber : 0;
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shower.go(slideNumber);
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if (isHistoryApiSupported) {
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history.pushState(null, null, url.pathname + '?full' + shower.getSlideHash(slideNumber));
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}
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shower.enterSlideMode();
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shower.updateProgress(slideNumber);
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shower.updateCurrentAndPassedSlides(slideNumber);
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shower.runSlideshowIfPresented(slideNumber);
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} else {
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if (isHistoryApiSupported) {
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history.pushState(null, null, url.pathname + shower.getSlideHash(currentSlideNumber));
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}
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shower.enterListMode();
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shower.scrollToSlide(currentSlideNumber);
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}
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break;
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case 13: // Enter
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if (shower.isListMode() && -1 !== currentSlideNumber) {
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e.preventDefault();
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if (isHistoryApiSupported)
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history.pushState(null, null, url.pathname + '?full' + shower.getSlideHash(currentSlideNumber));
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shower.enterSlideMode();
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shower.updateProgress(currentSlideNumber);
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shower.updateCurrentAndPassedSlides(currentSlideNumber);
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shower.runSlideshowIfPresented(currentSlideNumber);
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}
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break;
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case 27: // Esc
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if ( ! shower.isListMode()) {
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e.preventDefault();
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if (isHistoryApiSupported)
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history.pushState(null, null, url.pathname + shower.getSlideHash(currentSlideNumber));
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shower.enterListMode();
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shower.scrollToSlide(currentSlideNumber);
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}
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break;
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case 33: // PgUp
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case 38: // Up
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case 37: // Left
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case 72: // h
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case 75: // k
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e.preventDefault();
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shower.previous();
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break;
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case 34: // PgDown
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case 40: // Down
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case 39: // Right
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case 76: // l
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case 74: // j
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e.preventDefault();
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if ( ! shower.isListMode()) {
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// Inner navigation is "completed" if current slide have
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// no inner navigation or inner navigation is fully shown
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innerNavigationCompleted = !slideList[currentSlideNumber].hasInnerNavigation ||
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-1 === shower.increaseInnerNavigation(currentSlideNumber);
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} else {
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// Also inner navigation is always "completed" if we are in
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// list mode
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innerNavigationCompleted = true;
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}
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// NOTE: First of all check if there is no current slide
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if (
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-1 === currentSlideNumber || innerNavigationCompleted
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) {
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currentSlideNumber++;
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shower.go(currentSlideNumber);
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// We must run slideshow only in full mode
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if ( ! shower.isListMode()) {
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shower.runSlideshowIfPresented(currentSlideNumber);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 36: // Home
|
|
e.preventDefault();
|
|
|
|
shower.first();
|
|
break;
|
|
|
|
case 35: // End
|
|
e.preventDefault();
|
|
|
|
shower.last();
|
|
break;
|
|
|
|
case 9: // Tab = +1; Shift + Tab = -1
|
|
case 32: // Space = +1; Shift + Space = -1
|
|
e.preventDefault();
|
|
|
|
shower[e.shiftKey ? 'previous' : 'next']();
|
|
break;
|
|
|
|
default:
|
|
// Behave as usual
|
|
}
|
|
}, false);
|
|
|
|
document.addEventListener('click', shower._dispatchSingleSlideMode, false);
|
|
document.addEventListener('touchend', shower._dispatchSingleSlideMode, false);
|
|
|
|
document.addEventListener('touchstart', function (e) {
|
|
if ( ! shower.isListMode()) {
|
|
var currentSlideNumber = shower.getCurrentSlideNumber(),
|
|
x = e.touches[0].pageX;
|
|
if (x > window.innerWidth / 2) {
|
|
currentSlideNumber++;
|
|
} else {
|
|
currentSlideNumber--;
|
|
}
|
|
|
|
shower.go(currentSlideNumber);
|
|
}
|
|
}, false);
|
|
|
|
document.addEventListener('touchmove', function (e) {
|
|
if ( ! shower.isListMode()) {
|
|
e.preventDefault();
|
|
}
|
|
}, false);
|
|
|
|
return shower;
|
|
|
|
})(this, this.document);
|