--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/2015_04_21/scripts/script.js	Tue Jul 14 17:23:04 2015 +0900
@@ -0,0 +1,213 @@
+(function () {
+	var url = window.location,
+		body = document.body,
+		slides = document.querySelectorAll('div.slide'),
+		progress = document.querySelector('div.progress div'),
+		slideList = [],
+		l = slides.length,
+		i;
+
+	for (i = 0; i < l; i++) {
+		slideList.push(slides[i].id);
+	}
+
+	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;
+		body.style.msTransform = transform;
+		body.style.transform = transform;
+	}
+
+	function enterSingleSlideMode() {
+		body.className = 'full';
+		applyTransform(getTransform());
+	}
+
+	function enterSlideListMode() {
+		body.className = 'list';
+		applyTransform('none');
+	}
+
+	function getCurrentSlideNumber() {
+		return slideList.indexOf(url.hash.substr(1));
+	}
+
+	function scrollToCurrentSlide() {
+		var current_slide = document.getElementById(slideList[getCurrentSlideNumber()]);
+
+		if (null != current_slide) {
+			window.scrollTo(0, current_slide.offsetTop);
+		}
+	}
+
+	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) {
+		if (!progress) return;
+		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()) {
+			// "?full" is present without slide hash so we should display first
+			// slide
+			if ( -1 === getCurrentSlideNumber() ) {
+				history.replaceState(null, null, url.pathname + '?full' + getSlideHashByNumber( 0 ) );
+			}
+
+			enterSingleSlideMode();
+			updateProgress(getCurrentSlideNumber());
+		}
+	}, false);
+
+	window.addEventListener('popstate', function (e) {
+		if (isSlideListMode()) {
+			enterSlideListMode();
+			scrollToCurrentSlide();
+		} else {
+			enterSingleSlideMode();
+		}
+	}, false);
+
+	window.addEventListener('resize', function (e) {
+		if (!isSlideListMode()) {
+			applyTransform(getTransform());
+		}
+	}, false);
+
+	document.addEventListener('keydown', function (e) {
+		if (e.altKey || e.ctrlKey || e.metaKey) return;
+		
+		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 72: // h
+			case 75: // k
+				e.preventDefault();
+
+				current_slide_number--;
+				goToSlide(current_slide_number);
+			break;
+
+			case 34: // PgDown
+			case 40: // Down
+			case 39: // Right
+			case 76: // l
+			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);
+
+}());