From c1c5b35091d07210e69933c7e9fff5224f9a0b60 Mon Sep 17 00:00:00 2001 From: Oleg Roschupkin Date: Thu, 21 Jul 2011 03:08:31 +0900 Subject: [PATCH] Initial refactoring. --- scripts/script.js | 273 +++++++++++++++++++++++++++++----------------- 1 file changed, 174 insertions(+), 99 deletions(-) diff --git a/scripts/script.js b/scripts/script.js index e8424b0..499dd6a 100755 --- a/scripts/script.js +++ b/scripts/script.js @@ -1,24 +1,26 @@ -(function() { - +(function () { var url = window.location, body = document.body, slides = document.querySelectorAll('div.slide'), progress = document.querySelector('div.progress div'), - slideList = []; + slideList = [], + l = slides.length, + i; - for(var i = 0, slidesLength = slides.length; i < slidesLength; i++) { - slides[i].firstChild.addEventListener('click', enterFull, false); - slideList[i] = slides[i].id; + for (i = 0; i < l; i++) { + slideList.push(slides[i].id); } - function resizeFull(p) { - if(typeof p == 'boolean' && !p) { - var transform = 'none'; - } else { - var sx = body.clientWidth / window.innerWidth, - sy = body.clientHeight / window.innerHeight, - transform = 'scale(' + (1/Math.max(sx, sy)) + ')'; - } + function getTransform() { + var denominator = Math.max( + body.clientWidth / window.innerWidth, + body.clientHeight / window.innerHeight + ); + + return 'scale(' + (1 / denominator) + ')'; + } + + function applyTransform(transform) { body.style.MozTransform = transform; body.style.WebkitTransform = transform; body.style.OTransform = transform; @@ -26,102 +28,175 @@ body.style.transform = transform; } - function turnSlide(e) { - var current = currentSlide(), target; - if(e) { - if(e.type == 'keydown') { - var prevent = true; - switch(e.which) { - case 33 : // PgUp - case 38 : // Up - case 37 : // Left - case 75 : // k - current--; - break; - case 34 : // PgDown - case 40 : // Down - case 39 : // Right - case 74 : // j - current++; - break; - case 36 : // Home - current = 0; - break; - case 35 : // End - current = slideList.length-1; - break; - case 32 : // Space - current += e.shiftKey ? -1 : 1; - break; - default: - prevent = false; - } - if(prevent) e.preventDefault(); - } - if(e.type == 'click') { - current = slideList.indexOf(e.target.parentNode.parentNode.id); - } - } else { - current = (current+1) ? current : 0; - } - target = slideList[current]; - if(target) url.hash = target; - updateProgress(); - } - - function enterFull(e) { + function enterSingleSlideMode() { body.className = 'full'; - resizeFull(true); - turnSlide(e); - updateProgress(); - if(!isFull()) history.pushState(null, null, url.pathname + '?full' + url.hash); - window.addEventListener('resize', resizeFull, false); - document.addEventListener('keyup', exitFullKey, false); - document.removeEventListener('keydown', enterFullKey, false); - } - - function enterFullKey(e) { - if(e.which != 13) return; - enterFull(); + applyTransform(getTransform()); } - function exitFull() { + function enterSlideListMode() { body.className = 'list'; - resizeFull(false); - var hash = url.hash; - history.pushState(null, null, url.pathname.replace('?full', '')); - url.hash = hash; - window.removeEventListener('resize', resizeFull, false); - document.removeEventListener('keyup', exitFullKey, false); - document.addEventListener('keydown', enterFullKey, false); + applyTransform('none'); } - function exitFullKey(e) { - if(e.which != 27) return; - exitFull(); - } - - function isFull() { - return url.search.substr(1) == 'full'; - } - - function currentSlide() { + function getCurrentSlideNumber() { return slideList.indexOf(url.hash.substr(1)); } - function updateProgress() { - if(!progress) return; - progress.style.width = (100/(slideList.length-1) * currentSlide()).toFixed(2) + '%'; + function scrollToCurrentSlide() { + var current_slide = document.getElementById(slideList[getCurrentSlideNumber()]); + + if (null != current_slide) { + window.scrollTo(0, current_slide.offsetTop); + } } - window.addEventListener('DOMContentLoaded', function() { - if(isFull()) enterFull(); - }, false); - window.addEventListener('popstate', function() { - if(-1 === currentSlide()) exitFull(); + function isSlideListMode() { + return 'full' !== url.search.substr(1); + } + + function normalizeSlideNumber(slide_number) { + if (0 > slide_number) { + return slideList.length - 1; + } else if (slideList.length <= slide_number) { + return 0; + } else { + return slide_number; + } + } + + function updateProgress(slide_number) { + progress.style.width = (100 / (slideList.length - 1) * normalizeSlideNumber(slide_number)).toFixed(2) + '%'; + } + + function getSlideHashByNumber(slide_number) { + return '#' + slideList[normalizeSlideNumber(slide_number)]; + } + + function goToSlide(slide_number) { + url.hash = getSlideHashByNumber(slide_number); + + if (!isSlideListMode()) { + updateProgress(slide_number); + } + } + + window.addEventListener('DOMContentLoaded', function () { + if (!isSlideListMode()) { + updateProgress(getCurrentSlideNumber()); + enterSingleSlideMode(); + } }, false); - document.addEventListener('keydown', turnSlide, false); - document.addEventListener('keydown', enterFullKey, false); + window.addEventListener('popstate', function (e) { + if (isSlideListMode()) { + enterSlideListMode(); + scrollToCurrentSlide(); + } else { + enterSingleSlideMode(); + } + }, false); -})(); \ No newline at end of file + window.addEventListener('resize', function (e) { + if (!isSlideListMode()) { + applyTransform(getTransform()); + } + }, false); + + document.addEventListener('keydown', function (e) { + var current_slide_number = getCurrentSlideNumber(); + + switch (e.which) { + case 9: // Tab = +1; Shift + Tab = -1 + if (isSlideListMode()) { + e.preventDefault(); + + current_slide_number += e.shiftKey ? -1 : 1; + url.hash = getSlideHashByNumber(current_slide_number); + } + break; + + case 13: // Enter + if (isSlideListMode()) { + e.preventDefault(); + + history.pushState(null, null, url.pathname + '?full' + getSlideHashByNumber(current_slide_number)); + enterSingleSlideMode(); + + updateProgress(current_slide_number); + } + break; + + case 27: // Esc + if (!isSlideListMode()) { + e.preventDefault(); + + history.pushState(null, null, url.pathname + getSlideHashByNumber(current_slide_number)); + enterSlideListMode(); + scrollToCurrentSlide(); + } + break; + + case 33: // PgUp + case 38: // Up + case 37: // Left + case 75: // k + e.preventDefault(); + + current_slide_number--; + goToSlide(current_slide_number); + break; + + case 34: // PgDown + case 40: // Down + case 39: // Right + case 74: // j + e.preventDefault(); + + current_slide_number++; + goToSlide(current_slide_number); + break; + + case 36: // Home + e.preventDefault(); + + current_slide_number = 0; + goToSlide(current_slide_number); + break; + + case 35: // End + e.preventDefault(); + + current_slide_number = slideList.length - 1; + goToSlide(current_slide_number); + break; + + case 32: // Space = +1; Shift + Space = -1 + e.preventDefault(); + + current_slide_number += e.shiftKey ? -1 : 1; + goToSlide(current_slide_number); + break; + + default: + // Behave as usual + } + }, false); + + document.addEventListener('click', function (e) { + if ( + 'SECTION' === e.target.nodeName && + -1 !== e.target.parentNode.parentNode.className.indexOf('slide') && + isSlideListMode() + ) { + e.preventDefault(); + + // NOTE: we should update hash to get things work properly + url.hash = '#' + e.target.parentNode.parentNode.id; + history.replaceState(null, null, url.pathname + '?full#' + e.target.parentNode.parentNode.id); + enterSingleSlideMode(); + + updateProgress(getCurrentSlideNumber()); + } + }, false); + +}());