732 lines
17 KiB
JavaScript
Executable File
732 lines
17 KiB
JavaScript
Executable File
/**
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* Shower HTML presentation engine: github.com/shower/shower
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* @copyright 2010–2013 Vadim Makeev, pepelsbey.net
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* @license MIT license: github.com/shower/shower/wiki/MIT-License
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*/
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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 {HTMLElement} 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 IDs 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 {Boolean}
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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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* Check if arg is number.
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* @private
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* @param {String|Number} arg
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* @returns {Boolean}
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*/
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shower._isNumber = function(arg) {
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return ! isNaN(parseFloat(arg)) && isFinite(arg);
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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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* Get slide id from HTML element.
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* @private
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* @param {HTMLElement} el
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* @returns {String}
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*/
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shower._getSlideIdByEl = 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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* For touch devices: check if click on links...
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*
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* @TODO: add support for textareas/inputs/...
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*
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* @private
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* @param {HTMLElement} e
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* @returns {Boolean}
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*/
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shower._checkInteractiveElement = function(e) {
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return 'A' === e.target.nodeName;
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};
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/**
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* Get slide number by slideId
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* @param {String} slideId (HTML id or position in slideList)
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* @returns {Number}
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*/
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shower.getSlideNumber = function(slideId) {
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var i = slideList.length - 1,
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slideNumber;
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if (slideId === '') {
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slideNumber = 0;
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}
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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 (slideId === slideList[i].id) {
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slideNumber = i;
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break;
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}
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}
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return slideNumber;
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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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* @param {Function} [callback] runs only if you not in List mode
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* @returns {Number}
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*/
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shower.go = function(slideNumber, callback) {
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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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// Also triggers popstate and invoke shower.enter__Mode()
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url.hash = shower.getSlideHash(slideNumber);
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if (shower.isSlideMode()) {
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shower.showPresenterNotes(slideNumber);
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shower.updateProgress(slideNumber);
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shower.updateCurrentAndPassedSlides(slideNumber);
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shower.runInnerNavigation(slideNumber);
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}
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if (typeof(callback) === 'function') {
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callback();
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}
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return slideNumber;
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};
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/**
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* Show next slide or show next item of Inner navigation. If slide is last
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* returns false, otherwise return slide number which been shown.
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* @param {Function} [callback] runs only if shower.next() complete successfully
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* @returns {Number|Boolean}
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*/
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shower.next = function(callback) {
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var currentSlideNumber = shower.getCurrentSlideNumber(),
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ret = false;
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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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(
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-1 === currentSlideNumber ||
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! slideList[currentSlideNumber].hasInnerNavigation ||
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! shower.increaseInnerNavigation(currentSlideNumber)
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) &&
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// If exist next slide
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(currentSlideNumber + 2) <= slideList.length
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) {
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shower.go(currentSlideNumber + 1);
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// Slides starts from 0. So return next slide number.
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ret = currentSlideNumber + 2;
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}
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if (shower.isSlideMode()) {
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shower.runInnerNavigation(currentSlideNumber + 1);
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}
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if (typeof(callback) === 'function') {
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callback();
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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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* @param {Function} [callback] runs only if shower.previous() complete successfully
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* @returns {Number|Boolean}
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*/
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shower.previous = function(callback) {
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var currentSlideNumber = shower.getCurrentSlideNumber(),
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ret = false;
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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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if (typeof(callback) === 'function') {
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callback();
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}
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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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* @param {Function} [callback]
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* @returns {Number}
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*/
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shower.first = function(callback) {
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if (typeof(callback) === 'function') {
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callback();
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}
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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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* @param {Function} [callback]
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* @returns {Number}
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*/
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shower.last = function(callback) {
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if (typeof(callback) === 'function') {
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callback();
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}
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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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* @param {Function} [callback] runs only if shower.enterSlideMode() complete successfully
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* @returns {Boolean}
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*/
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shower.enterSlideMode = function(callback) {
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var currentSlideNumber = shower.getCurrentSlideNumber();
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// Anyway: change body class (@TODO: refactoring)
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body.classList.remove('list');
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body.classList.add('full');
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// Preparing URL for shower.go()
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if (shower.isListMode() && isHistoryApiSupported) {
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history.pushState(null, null, url.pathname + '?full' + shower.getSlideHash(currentSlideNumber));
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}
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shower._applyTransform(shower._getTransform());
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if (typeof(callback) === 'function') {
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callback();
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}
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return true;
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};
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/**
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* Switch to list view.
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* @param {Function} [callback] runs only if shower.enterListMode() complete successfully
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* @returns {Boolean}
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*/
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shower.enterListMode = function(callback) {
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// Anyway: change body class (@TODO: refactoring)
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body.classList.remove('full');
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body.classList.add('list');
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shower.clearPresenterNotes();
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if (shower.isListMode()) {
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return false;
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}
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var currentSlideNumber = shower.getCurrentSlideNumber();
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clearTimeout(timer);
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if (shower.isSlideMode() && isHistoryApiSupported) {
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history.pushState(null, null, url.pathname + shower.getSlideHash(currentSlideNumber));
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}
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shower.scrollToSlide(currentSlideNumber);
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shower._applyTransform('none');
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if (typeof(callback) === 'function') {
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callback();
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}
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return true;
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};
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/**
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* Toggle Mode: Slide and List
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* @param {Function} [callback]
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*/
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shower.toggleMode = function(callback) {
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if (shower.isListMode()) {
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shower.enterSlideMode();
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} else {
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shower.enterListMode();
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}
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if (typeof(callback) === 'function') {
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callback();
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}
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return true;
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};
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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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* Scroll to slide.
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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.scrollToSlide = function(slideNumber) {
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var currentSlide,
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ret = false;
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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.isSlideMode()) {
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throw new Error('You can\'t scroll to because 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 ret;
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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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* Check 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.*/.test(url.search.substr(1)) : body.classList.contains('list');
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};
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/**
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* Check if it's Slide mode.
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* @returns {Boolean}
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*/
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shower.isSlideMode = function() {
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return isHistoryApiSupported ? /^full.*/.test(url.search.substr(1)) : body.classList.contains('full');
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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('active');
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slide.classList.add('visited');
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} else if (i > slideNumber) {
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slide.classList.remove('visited');
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slide.classList.remove('active');
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} else {
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slide.classList.remove('visited');
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slide.classList.add('active');
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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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* Clear presenter notes in console.
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*/
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shower.clearPresenterNotes = function() {
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if (window.console && window.console.clear) {
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console.clear();
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}
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};
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/**
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* Show presenter notes in console.
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* @param {Number} slideNumber slide number (sic!). Attention: starts from zero.
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*/
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shower.showPresenterNotes = function(slideNumber) {
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shower.clearPresenterNotes();
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if (window.console) {
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slideNumber = shower._normalizeSlideNumber(slideNumber);
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var slideId = slideList[slideNumber].id,
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nextSlideId = slideList[slideNumber + 1] ? slideList[slideNumber + 1].id : null,
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notes = document.getElementById(slideId).querySelector('footer');
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if (notes && notes.innerHTML) {
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console.info(notes.innerHTML.replace(/\n\s+/g,'\n'));
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}
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if (nextSlideId) {
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var next = document.getElementById(nextSlideId).querySelector('h2');
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if (next) {
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next = next.innerHTML.replace(/^\s+|<[^>]+>/g,'');
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console.info('NEXT: ' + next);
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}
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}
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}
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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 {String}
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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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* Run slide show if presented.
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* @param {Number} slideNumber
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* @returns {Boolean}
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*/
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shower.runInnerNavigation = 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.next();
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},
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timing);
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}
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return true;
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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 {Boolean}
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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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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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return true;
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}
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}
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return false;
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};
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// Event handlers
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window.addEventListener('DOMContentLoaded', function() {
|
||
if (body.classList.contains('full') || shower.isSlideMode()) {
|
||
shower.go(shower.getCurrentSlideNumber());
|
||
shower.enterSlideMode();
|
||
}
|
||
}, false);
|
||
|
||
window.addEventListener('popstate', function() {
|
||
if (shower.isListMode()) {
|
||
shower.enterListMode();
|
||
} else {
|
||
shower.enterSlideMode();
|
||
}
|
||
}, false);
|
||
|
||
window.addEventListener('resize', function() {
|
||
if (shower.isSlideMode()) {
|
||
shower._applyTransform(shower._getTransform());
|
||
}
|
||
}, false);
|
||
|
||
document.addEventListener('keydown', function(e) {
|
||
// Shortcut for alt, ctrl and meta keys
|
||
if (e.altKey || e.ctrlKey || e.metaKey) { return; }
|
||
|
||
var currentSlideNumber = shower.getCurrentSlideNumber(),
|
||
isInnerNavCompleted = true;
|
||
|
||
switch (e.which) {
|
||
case 116: // F5
|
||
e.preventDefault();
|
||
|
||
if (shower.isListMode()) {
|
||
var slideNumber = e.shiftKey ? currentSlideNumber : 0;
|
||
|
||
// Warning: go must be before enterSlideMode. Else there are
|
||
// bug in Chrome
|
||
shower.go(slideNumber);
|
||
shower.enterSlideMode();
|
||
shower.showPresenterNotes(slideNumber);
|
||
} else {
|
||
shower.enterListMode();
|
||
}
|
||
break;
|
||
|
||
case 13: // Enter
|
||
if (shower.isListMode() && -1 !== currentSlideNumber) {
|
||
e.preventDefault();
|
||
shower.enterSlideMode();
|
||
}
|
||
break;
|
||
|
||
case 27: // Esc
|
||
if (shower.isSlideMode()) {
|
||
e.preventDefault();
|
||
shower.enterListMode();
|
||
}
|
||
break;
|
||
|
||
case 33: // PgUp
|
||
case 38: // Up
|
||
case 37: // Left
|
||
case 72: // h
|
||
case 75: // k
|
||
e.preventDefault();
|
||
shower.previous();
|
||
break;
|
||
|
||
case 34: // PgDown
|
||
case 40: // Down
|
||
case 39: // Right
|
||
case 76: // l
|
||
case 74: // j
|
||
e.preventDefault();
|
||
shower.next();
|
||
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', function(e) {
|
||
e.preventDefault();
|
||
|
||
var slideNumber = shower.getSlideNumber(shower._getSlideIdByEl(e.target));
|
||
|
||
// Click on slide in List mode
|
||
if (shower.isListMode() && shower._getSlideIdByEl(e.target)) {
|
||
// Warning: go must be before enterSlideMode. Else there are
|
||
// bug in Chrome
|
||
shower.go(slideNumber);
|
||
shower.enterSlideMode();
|
||
shower.showPresenterNotes(slideNumber);
|
||
}
|
||
}, false);
|
||
|
||
document.addEventListener('touchstart', function(e) {
|
||
if (shower._getSlideIdByEl(e.target)) {
|
||
if (shower.isSlideMode() && ! shower._checkInteractiveElement(e)) {
|
||
var x = e.touches[0].pageX;
|
||
|
||
if (x > window.innerWidth / 2) {
|
||
shower.next();
|
||
} else {
|
||
shower.previous();
|
||
}
|
||
}
|
||
|
||
if (shower.isListMode()) {
|
||
shower.go(shower.getSlideNumber(shower._getSlideIdByEl(e.target)));
|
||
shower.enterSlideMode();
|
||
}
|
||
}
|
||
|
||
|
||
}, false);
|
||
|
||
document.addEventListener('touchmove', function(e) {
|
||
if (shower.isSlideMode()) {
|
||
e.preventDefault();
|
||
}
|
||
}, false);
|
||
|
||
return shower;
|
||
|
||
})(this, this.document);
|