Initial refactoring.
This commit is contained in:
Oleg Roschupkin
parent
35f794904f
commit
c1c5b35091
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@ -1,24 +1,26 @@
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(function () {
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var url = window.location,
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body = document.body,
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slides = document.querySelectorAll('div.slide'),
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progress = document.querySelector('div.progress div'),
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slideList = [];
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slideList = [],
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l = slides.length,
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i;
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for(var i = 0, slidesLength = slides.length; i < slidesLength; i++) {
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slides[i].firstChild.addEventListener('click', enterFull, false);
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slideList[i] = slides[i].id;
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for (i = 0; i < l; i++) {
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slideList.push(slides[i].id);
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}
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function resizeFull(p) {
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if(typeof p == 'boolean' && !p) {
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var transform = 'none';
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} else {
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var sx = body.clientWidth / window.innerWidth,
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sy = body.clientHeight / window.innerHeight,
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transform = 'scale(' + (1/Math.max(sx, sy)) + ')';
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function getTransform() {
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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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function applyTransform(transform) {
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body.style.MozTransform = transform;
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body.style.WebkitTransform = transform;
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body.style.OTransform = transform;
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@ -26,102 +28,175 @@
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body.style.transform = transform;
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}
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function turnSlide(e) {
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var current = currentSlide(), target;
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if(e) {
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if(e.type == 'keydown') {
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var prevent = true;
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function enterSingleSlideMode() {
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body.className = 'full';
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applyTransform(getTransform());
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}
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function enterSlideListMode() {
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body.className = 'list';
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applyTransform('none');
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}
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function getCurrentSlideNumber() {
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return slideList.indexOf(url.hash.substr(1));
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}
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function scrollToCurrentSlide() {
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var current_slide = document.getElementById(slideList[getCurrentSlideNumber()]);
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if (null != current_slide) {
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window.scrollTo(0, current_slide.offsetTop);
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}
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}
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function isSlideListMode() {
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return 'full' !== url.search.substr(1);
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}
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function normalizeSlideNumber(slide_number) {
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if (0 > slide_number) {
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return slideList.length - 1;
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} else if (slideList.length <= slide_number) {
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return 0;
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} else {
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return slide_number;
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}
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}
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function updateProgress(slide_number) {
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progress.style.width = (100 / (slideList.length - 1) * normalizeSlideNumber(slide_number)).toFixed(2) + '%';
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}
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function getSlideHashByNumber(slide_number) {
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return '#' + slideList[normalizeSlideNumber(slide_number)];
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}
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function goToSlide(slide_number) {
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url.hash = getSlideHashByNumber(slide_number);
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if (!isSlideListMode()) {
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updateProgress(slide_number);
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}
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}
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window.addEventListener('DOMContentLoaded', function () {
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if (!isSlideListMode()) {
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updateProgress(getCurrentSlideNumber());
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enterSingleSlideMode();
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}
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}, false);
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window.addEventListener('popstate', function (e) {
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if (isSlideListMode()) {
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enterSlideListMode();
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scrollToCurrentSlide();
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} else {
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enterSingleSlideMode();
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}
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}, false);
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window.addEventListener('resize', function (e) {
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if (!isSlideListMode()) {
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applyTransform(getTransform());
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}
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}, false);
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document.addEventListener('keydown', function (e) {
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var current_slide_number = getCurrentSlideNumber();
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switch (e.which) {
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case 9: // Tab = +1; Shift + Tab = -1
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if (isSlideListMode()) {
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e.preventDefault();
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current_slide_number += e.shiftKey ? -1 : 1;
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url.hash = getSlideHashByNumber(current_slide_number);
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}
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break;
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case 13: // Enter
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if (isSlideListMode()) {
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e.preventDefault();
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history.pushState(null, null, url.pathname + '?full' + getSlideHashByNumber(current_slide_number));
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enterSingleSlideMode();
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updateProgress(current_slide_number);
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}
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break;
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case 27: // Esc
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if (!isSlideListMode()) {
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e.preventDefault();
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history.pushState(null, null, url.pathname + getSlideHashByNumber(current_slide_number));
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enterSlideListMode();
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scrollToCurrentSlide();
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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 75: // k
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current--;
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e.preventDefault();
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current_slide_number--;
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goToSlide(current_slide_number);
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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 74: // j
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current++;
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e.preventDefault();
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current_slide_number++;
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goToSlide(current_slide_number);
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break;
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case 36: // Home
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current = 0;
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e.preventDefault();
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current_slide_number = 0;
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goToSlide(current_slide_number);
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break;
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case 35: // End
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current = slideList.length-1;
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e.preventDefault();
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current_slide_number = slideList.length - 1;
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goToSlide(current_slide_number);
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break;
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case 32 : // Space
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current += e.shiftKey ? -1 : 1;
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case 32: // Space = +1; Shift + Space = -1
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e.preventDefault();
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current_slide_number += e.shiftKey ? -1 : 1;
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goToSlide(current_slide_number);
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break;
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default:
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prevent = false;
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// Behave as usual
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}
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if(prevent) e.preventDefault();
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}
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if(e.type == 'click') {
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current = slideList.indexOf(e.target.parentNode.parentNode.id);
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}
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} else {
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current = (current+1) ? current : 0;
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}
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target = slideList[current];
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if(target) url.hash = target;
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updateProgress();
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}
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function enterFull(e) {
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body.className = 'full';
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resizeFull(true);
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turnSlide(e);
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updateProgress();
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if(!isFull()) history.pushState(null, null, url.pathname + '?full' + url.hash);
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window.addEventListener('resize', resizeFull, false);
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document.addEventListener('keyup', exitFullKey, false);
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document.removeEventListener('keydown', enterFullKey, false);
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}
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function enterFullKey(e) {
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if(e.which != 13) return;
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enterFull();
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}
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function exitFull() {
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body.className = 'list';
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resizeFull(false);
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var hash = url.hash;
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history.pushState(null, null, url.pathname.replace('?full', ''));
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url.hash = hash;
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window.removeEventListener('resize', resizeFull, false);
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document.removeEventListener('keyup', exitFullKey, false);
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document.addEventListener('keydown', enterFullKey, false);
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}
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function exitFullKey(e) {
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if(e.which != 27) return;
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exitFull();
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}
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function isFull() {
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return url.search.substr(1) == 'full';
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}
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function currentSlide() {
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return slideList.indexOf(url.hash.substr(1));
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}
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function updateProgress() {
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if(!progress) return;
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progress.style.width = (100/(slideList.length-1) * currentSlide()).toFixed(2) + '%';
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}
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window.addEventListener('DOMContentLoaded', function() {
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if(isFull()) enterFull();
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}, false);
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window.addEventListener('popstate', function() {
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if(-1 === currentSlide()) exitFull();
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}, false);
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document.addEventListener('keydown', turnSlide, false);
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document.addEventListener('keydown', enterFullKey, false);
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document.addEventListener('click', function (e) {
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if (
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'SECTION' === e.target.nodeName &&
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-1 !== e.target.parentNode.parentNode.className.indexOf('slide') &&
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isSlideListMode()
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) {
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e.preventDefault();
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})();
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// NOTE: we should update hash to get things work properly
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url.hash = '#' + e.target.parentNode.parentNode.id;
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history.replaceState(null, null, url.pathname + '?full#' + e.target.parentNode.parentNode.id);
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enterSingleSlideMode();
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updateProgress(getCurrentSlideNumber());
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}
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}, false);
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}());
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