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https://github.com/gopl-zh/gopl-zh.github.com.git
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deploy: b76e3beb2c
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github-actions[bot]
611
static/present/slides.js
Normal file
611
static/present/slides.js
Normal file
@@ -0,0 +1,611 @@
|
||||
// Copyright 2012 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
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||||
|
||||
var PERMANENT_URL_PREFIX = './static/present/';
|
||||
|
||||
var SLIDE_CLASSES = ['far-past', 'past', 'current', 'next', 'far-next'];
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||||
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||||
var PM_TOUCH_SENSITIVITY = 15;
|
||||
|
||||
var curSlide;
|
||||
|
||||
/* ---------------------------------------------------------------------- */
|
||||
/* classList polyfill by Eli Grey
|
||||
* (http://purl.eligrey.com/github/classList.js/blob/master/classList.js) */
|
||||
|
||||
if (
|
||||
typeof document !== 'undefined' &&
|
||||
!('classList' in document.createElement('a'))
|
||||
) {
|
||||
(function(view) {
|
||||
var classListProp = 'classList',
|
||||
protoProp = 'prototype',
|
||||
elemCtrProto = (view.HTMLElement || view.Element)[protoProp],
|
||||
objCtr = Object;
|
||||
(strTrim =
|
||||
String[protoProp].trim ||
|
||||
function() {
|
||||
return this.replace(/^\s+|\s+$/g, '');
|
||||
}),
|
||||
(arrIndexOf =
|
||||
Array[protoProp].indexOf ||
|
||||
function(item) {
|
||||
for (var i = 0, len = this.length; i < len; i++) {
|
||||
if (i in this && this[i] === item) {
|
||||
return i;
|
||||
}
|
||||
}
|
||||
return -1;
|
||||
}),
|
||||
// Vendors: please allow content code to instantiate DOMExceptions
|
||||
(DOMEx = function(type, message) {
|
||||
this.name = type;
|
||||
this.code = DOMException[type];
|
||||
this.message = message;
|
||||
}),
|
||||
(checkTokenAndGetIndex = function(classList, token) {
|
||||
if (token === '') {
|
||||
throw new DOMEx(
|
||||
'SYNTAX_ERR',
|
||||
'An invalid or illegal string was specified'
|
||||
);
|
||||
}
|
||||
if (/\s/.test(token)) {
|
||||
throw new DOMEx(
|
||||
'INVALID_CHARACTER_ERR',
|
||||
'String contains an invalid character'
|
||||
);
|
||||
}
|
||||
return arrIndexOf.call(classList, token);
|
||||
}),
|
||||
(ClassList = function(elem) {
|
||||
var trimmedClasses = strTrim.call(elem.className),
|
||||
classes = trimmedClasses ? trimmedClasses.split(/\s+/) : [];
|
||||
for (var i = 0, len = classes.length; i < len; i++) {
|
||||
this.push(classes[i]);
|
||||
}
|
||||
this._updateClassName = function() {
|
||||
elem.className = this.toString();
|
||||
};
|
||||
}),
|
||||
(classListProto = ClassList[protoProp] = []),
|
||||
(classListGetter = function() {
|
||||
return new ClassList(this);
|
||||
});
|
||||
// Most DOMException implementations don't allow calling DOMException's toString()
|
||||
// on non-DOMExceptions. Error's toString() is sufficient here.
|
||||
DOMEx[protoProp] = Error[protoProp];
|
||||
classListProto.item = function(i) {
|
||||
return this[i] || null;
|
||||
};
|
||||
classListProto.contains = function(token) {
|
||||
token += '';
|
||||
return checkTokenAndGetIndex(this, token) !== -1;
|
||||
};
|
||||
classListProto.add = function(token) {
|
||||
token += '';
|
||||
if (checkTokenAndGetIndex(this, token) === -1) {
|
||||
this.push(token);
|
||||
this._updateClassName();
|
||||
}
|
||||
};
|
||||
classListProto.remove = function(token) {
|
||||
token += '';
|
||||
var index = checkTokenAndGetIndex(this, token);
|
||||
if (index !== -1) {
|
||||
this.splice(index, 1);
|
||||
this._updateClassName();
|
||||
}
|
||||
};
|
||||
classListProto.toggle = function(token) {
|
||||
token += '';
|
||||
if (checkTokenAndGetIndex(this, token) === -1) {
|
||||
this.add(token);
|
||||
} else {
|
||||
this.remove(token);
|
||||
}
|
||||
};
|
||||
classListProto.toString = function() {
|
||||
return this.join(' ');
|
||||
};
|
||||
|
||||
if (objCtr.defineProperty) {
|
||||
var classListPropDesc = {
|
||||
get: classListGetter,
|
||||
enumerable: true,
|
||||
configurable: true,
|
||||
};
|
||||
try {
|
||||
objCtr.defineProperty(elemCtrProto, classListProp, classListPropDesc);
|
||||
} catch (ex) {
|
||||
// IE 8 doesn't support enumerable:true
|
||||
if (ex.number === -0x7ff5ec54) {
|
||||
classListPropDesc.enumerable = false;
|
||||
objCtr.defineProperty(elemCtrProto, classListProp, classListPropDesc);
|
||||
}
|
||||
}
|
||||
} else if (objCtr[protoProp].__defineGetter__) {
|
||||
elemCtrProto.__defineGetter__(classListProp, classListGetter);
|
||||
}
|
||||
})(self);
|
||||
}
|
||||
/* ---------------------------------------------------------------------- */
|
||||
|
||||
/* Slide movement */
|
||||
|
||||
function hideHelpText() {
|
||||
document.getElementById('help').style.display = 'none';
|
||||
}
|
||||
|
||||
function getSlideEl(no) {
|
||||
if (no < 0 || no >= slideEls.length) {
|
||||
return null;
|
||||
} else {
|
||||
return slideEls[no];
|
||||
}
|
||||
}
|
||||
|
||||
function updateSlideClass(slideNo, className) {
|
||||
var el = getSlideEl(slideNo);
|
||||
|
||||
if (!el) {
|
||||
return;
|
||||
}
|
||||
|
||||
if (className) {
|
||||
el.classList.add(className);
|
||||
}
|
||||
|
||||
for (var i in SLIDE_CLASSES) {
|
||||
if (className != SLIDE_CLASSES[i]) {
|
||||
el.classList.remove(SLIDE_CLASSES[i]);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
function updateSlides() {
|
||||
if (window.trackPageview) window.trackPageview();
|
||||
|
||||
for (var i = 0; i < slideEls.length; i++) {
|
||||
switch (i) {
|
||||
case curSlide - 2:
|
||||
updateSlideClass(i, 'far-past');
|
||||
break;
|
||||
case curSlide - 1:
|
||||
updateSlideClass(i, 'past');
|
||||
break;
|
||||
case curSlide:
|
||||
updateSlideClass(i, 'current');
|
||||
break;
|
||||
case curSlide + 1:
|
||||
updateSlideClass(i, 'next');
|
||||
break;
|
||||
case curSlide + 2:
|
||||
updateSlideClass(i, 'far-next');
|
||||
break;
|
||||
default:
|
||||
updateSlideClass(i);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
triggerLeaveEvent(curSlide - 1);
|
||||
triggerEnterEvent(curSlide);
|
||||
|
||||
window.setTimeout(function() {
|
||||
// Hide after the slide
|
||||
disableSlideFrames(curSlide - 2);
|
||||
}, 301);
|
||||
|
||||
enableSlideFrames(curSlide - 1);
|
||||
enableSlideFrames(curSlide + 2);
|
||||
|
||||
updateHash();
|
||||
}
|
||||
|
||||
function prevSlide() {
|
||||
hideHelpText();
|
||||
if (curSlide > 0) {
|
||||
curSlide--;
|
||||
|
||||
updateSlides();
|
||||
}
|
||||
|
||||
if (notesEnabled) localStorage.setItem(destSlideKey(), curSlide);
|
||||
}
|
||||
|
||||
function nextSlide() {
|
||||
hideHelpText();
|
||||
if (curSlide < slideEls.length - 1) {
|
||||
curSlide++;
|
||||
|
||||
updateSlides();
|
||||
}
|
||||
|
||||
if (notesEnabled) localStorage.setItem(destSlideKey(), curSlide);
|
||||
}
|
||||
|
||||
/* Slide events */
|
||||
|
||||
function triggerEnterEvent(no) {
|
||||
var el = getSlideEl(no);
|
||||
if (!el) {
|
||||
return;
|
||||
}
|
||||
|
||||
var onEnter = el.getAttribute('onslideenter');
|
||||
if (onEnter) {
|
||||
new Function(onEnter).call(el);
|
||||
}
|
||||
|
||||
var evt = document.createEvent('Event');
|
||||
evt.initEvent('slideenter', true, true);
|
||||
evt.slideNumber = no + 1; // Make it readable
|
||||
|
||||
el.dispatchEvent(evt);
|
||||
}
|
||||
|
||||
function triggerLeaveEvent(no) {
|
||||
var el = getSlideEl(no);
|
||||
if (!el) {
|
||||
return;
|
||||
}
|
||||
|
||||
var onLeave = el.getAttribute('onslideleave');
|
||||
if (onLeave) {
|
||||
new Function(onLeave).call(el);
|
||||
}
|
||||
|
||||
var evt = document.createEvent('Event');
|
||||
evt.initEvent('slideleave', true, true);
|
||||
evt.slideNumber = no + 1; // Make it readable
|
||||
|
||||
el.dispatchEvent(evt);
|
||||
}
|
||||
|
||||
/* Touch events */
|
||||
|
||||
function handleTouchStart(event) {
|
||||
if (event.touches.length == 1) {
|
||||
touchDX = 0;
|
||||
touchDY = 0;
|
||||
|
||||
touchStartX = event.touches[0].pageX;
|
||||
touchStartY = event.touches[0].pageY;
|
||||
|
||||
document.body.addEventListener('touchmove', handleTouchMove, true);
|
||||
document.body.addEventListener('touchend', handleTouchEnd, true);
|
||||
}
|
||||
}
|
||||
|
||||
function handleTouchMove(event) {
|
||||
if (event.touches.length > 1) {
|
||||
cancelTouch();
|
||||
} else {
|
||||
touchDX = event.touches[0].pageX - touchStartX;
|
||||
touchDY = event.touches[0].pageY - touchStartY;
|
||||
event.preventDefault();
|
||||
}
|
||||
}
|
||||
|
||||
function handleTouchEnd(event) {
|
||||
var dx = Math.abs(touchDX);
|
||||
var dy = Math.abs(touchDY);
|
||||
|
||||
if (dx > PM_TOUCH_SENSITIVITY && dy < (dx * 2) / 3) {
|
||||
if (touchDX > 0) {
|
||||
prevSlide();
|
||||
} else {
|
||||
nextSlide();
|
||||
}
|
||||
}
|
||||
|
||||
cancelTouch();
|
||||
}
|
||||
|
||||
function cancelTouch() {
|
||||
document.body.removeEventListener('touchmove', handleTouchMove, true);
|
||||
document.body.removeEventListener('touchend', handleTouchEnd, true);
|
||||
}
|
||||
|
||||
/* Preloading frames */
|
||||
|
||||
function disableSlideFrames(no) {
|
||||
var el = getSlideEl(no);
|
||||
if (!el) {
|
||||
return;
|
||||
}
|
||||
|
||||
var frames = el.getElementsByTagName('iframe');
|
||||
for (var i = 0, frame; (frame = frames[i]); i++) {
|
||||
disableFrame(frame);
|
||||
}
|
||||
}
|
||||
|
||||
function enableSlideFrames(no) {
|
||||
var el = getSlideEl(no);
|
||||
if (!el) {
|
||||
return;
|
||||
}
|
||||
|
||||
var frames = el.getElementsByTagName('iframe');
|
||||
for (var i = 0, frame; (frame = frames[i]); i++) {
|
||||
enableFrame(frame);
|
||||
}
|
||||
}
|
||||
|
||||
function disableFrame(frame) {
|
||||
frame.src = 'about:blank';
|
||||
}
|
||||
|
||||
function enableFrame(frame) {
|
||||
var src = frame._src;
|
||||
|
||||
if (frame.src != src && src != 'about:blank') {
|
||||
frame.src = src;
|
||||
}
|
||||
}
|
||||
|
||||
function setupFrames() {
|
||||
var frames = document.querySelectorAll('iframe');
|
||||
for (var i = 0, frame; (frame = frames[i]); i++) {
|
||||
frame._src = frame.src;
|
||||
disableFrame(frame);
|
||||
}
|
||||
|
||||
enableSlideFrames(curSlide);
|
||||
enableSlideFrames(curSlide + 1);
|
||||
enableSlideFrames(curSlide + 2);
|
||||
}
|
||||
|
||||
function setupInteraction() {
|
||||
/* Clicking and tapping */
|
||||
|
||||
var el = document.createElement('div');
|
||||
el.className = 'slide-area';
|
||||
el.id = 'prev-slide-area';
|
||||
el.addEventListener('click', prevSlide, false);
|
||||
document.querySelector('section.slides').appendChild(el);
|
||||
|
||||
var el = document.createElement('div');
|
||||
el.className = 'slide-area';
|
||||
el.id = 'next-slide-area';
|
||||
el.addEventListener('click', nextSlide, false);
|
||||
document.querySelector('section.slides').appendChild(el);
|
||||
|
||||
/* Swiping */
|
||||
|
||||
document.body.addEventListener('touchstart', handleTouchStart, false);
|
||||
}
|
||||
|
||||
/* Hash functions */
|
||||
|
||||
function getCurSlideFromHash() {
|
||||
var slideNo = parseInt(location.hash.substr(1));
|
||||
|
||||
if (slideNo) {
|
||||
curSlide = slideNo - 1;
|
||||
} else {
|
||||
curSlide = 0;
|
||||
}
|
||||
}
|
||||
|
||||
function updateHash() {
|
||||
location.replace('#' + (curSlide + 1));
|
||||
}
|
||||
|
||||
/* Event listeners */
|
||||
|
||||
function handleBodyKeyDown(event) {
|
||||
// If we're in a code element, only handle pgup/down.
|
||||
var inCode = event.target.classList.contains('code');
|
||||
|
||||
switch (event.keyCode) {
|
||||
case 78: // 'N' opens presenter notes window
|
||||
if (!inCode && notesEnabled) toggleNotesWindow();
|
||||
break;
|
||||
case 72: // 'H' hides the help text
|
||||
case 27: // escape key
|
||||
if (!inCode) hideHelpText();
|
||||
break;
|
||||
|
||||
case 39: // right arrow
|
||||
case 13: // Enter
|
||||
case 32: // space
|
||||
if (inCode) break;
|
||||
case 34: // PgDn
|
||||
nextSlide();
|
||||
event.preventDefault();
|
||||
break;
|
||||
|
||||
case 37: // left arrow
|
||||
case 8: // Backspace
|
||||
if (inCode) break;
|
||||
case 33: // PgUp
|
||||
prevSlide();
|
||||
event.preventDefault();
|
||||
break;
|
||||
|
||||
case 40: // down arrow
|
||||
if (inCode) break;
|
||||
nextSlide();
|
||||
event.preventDefault();
|
||||
break;
|
||||
|
||||
case 38: // up arrow
|
||||
if (inCode) break;
|
||||
prevSlide();
|
||||
event.preventDefault();
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
function scaleSmallViewports() {
|
||||
var el = document.querySelector('section.slides');
|
||||
var transform = '';
|
||||
var sWidthPx = 1250;
|
||||
var sHeightPx = 750;
|
||||
var sAspectRatio = sWidthPx / sHeightPx;
|
||||
var wAspectRatio = window.innerWidth / window.innerHeight;
|
||||
|
||||
if (wAspectRatio <= sAspectRatio && window.innerWidth < sWidthPx) {
|
||||
transform = 'scale(' + window.innerWidth / sWidthPx + ')';
|
||||
} else if (window.innerHeight < sHeightPx) {
|
||||
transform = 'scale(' + window.innerHeight / sHeightPx + ')';
|
||||
}
|
||||
el.style.transform = transform;
|
||||
}
|
||||
|
||||
function addEventListeners() {
|
||||
document.addEventListener('keydown', handleBodyKeyDown, false);
|
||||
var resizeTimeout;
|
||||
window.addEventListener('resize', function() {
|
||||
// throttle resize events
|
||||
window.clearTimeout(resizeTimeout);
|
||||
resizeTimeout = window.setTimeout(function() {
|
||||
resizeTimeout = null;
|
||||
scaleSmallViewports();
|
||||
}, 50);
|
||||
});
|
||||
|
||||
// Force reset transform property of section.slides when printing page.
|
||||
// Use both onbeforeprint and matchMedia for compatibility with different browsers.
|
||||
var beforePrint = function() {
|
||||
var el = document.querySelector('section.slides');
|
||||
el.style.transform = '';
|
||||
};
|
||||
window.onbeforeprint = beforePrint;
|
||||
if (window.matchMedia) {
|
||||
var mediaQueryList = window.matchMedia('print');
|
||||
mediaQueryList.addListener(function(mql) {
|
||||
if (mql.matches) beforePrint();
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
/* Initialization */
|
||||
|
||||
function addFontStyle() {
|
||||
var el = document.createElement('link');
|
||||
el.rel = 'stylesheet';
|
||||
el.type = 'text/css';
|
||||
|
||||
//el.href =
|
||||
// '//fonts.googleapis.com/css?family=' +
|
||||
// 'Open+Sans:regular,semibold,italic,italicsemibold|Droid+Sans+Mono';
|
||||
el.href = PERMANENT_URL_PREFIX + 'font.css';
|
||||
|
||||
document.body.appendChild(el);
|
||||
}
|
||||
|
||||
function addGeneralStyle() {
|
||||
var el = document.createElement('link');
|
||||
el.rel = 'stylesheet';
|
||||
el.type = 'text/css';
|
||||
el.href = PERMANENT_URL_PREFIX + 'styles.css';
|
||||
document.body.appendChild(el);
|
||||
|
||||
var el = document.createElement('meta');
|
||||
el.name = 'viewport';
|
||||
el.content = 'width=device-width,height=device-height,initial-scale=1';
|
||||
document.querySelector('head').appendChild(el);
|
||||
|
||||
var el = document.createElement('meta');
|
||||
el.name = 'apple-mobile-web-app-capable';
|
||||
el.content = 'yes';
|
||||
document.querySelector('head').appendChild(el);
|
||||
|
||||
scaleSmallViewports();
|
||||
}
|
||||
|
||||
function handleDomLoaded() {
|
||||
slideEls = document.querySelectorAll('section.slides > article');
|
||||
|
||||
setupFrames();
|
||||
|
||||
addFontStyle();
|
||||
addGeneralStyle();
|
||||
addEventListeners();
|
||||
|
||||
updateSlides();
|
||||
|
||||
setupInteraction();
|
||||
|
||||
if (
|
||||
window.location.hostname == 'localhost' ||
|
||||
window.location.hostname == '127.0.0.1' ||
|
||||
window.location.hostname == '::1'
|
||||
) {
|
||||
hideHelpText();
|
||||
}
|
||||
|
||||
document.body.classList.add('loaded');
|
||||
|
||||
setupNotesSync();
|
||||
}
|
||||
|
||||
function initialize() {
|
||||
getCurSlideFromHash();
|
||||
|
||||
if (window['_DEBUG']) {
|
||||
PERMANENT_URL_PREFIX = '../';
|
||||
}
|
||||
|
||||
if (window['_DCL']) {
|
||||
handleDomLoaded();
|
||||
} else {
|
||||
document.addEventListener('DOMContentLoaded', handleDomLoaded, false);
|
||||
}
|
||||
}
|
||||
|
||||
// If ?debug exists then load the script relative instead of absolute
|
||||
if (!window['_DEBUG'] && document.location.href.indexOf('?debug') !== -1) {
|
||||
document.addEventListener(
|
||||
'DOMContentLoaded',
|
||||
function() {
|
||||
// Avoid missing the DomContentLoaded event
|
||||
window['_DCL'] = true;
|
||||
},
|
||||
false
|
||||
);
|
||||
|
||||
window['_DEBUG'] = true;
|
||||
var script = document.createElement('script');
|
||||
script.type = 'text/javascript';
|
||||
script.src = PERMANENT_URL_PREFIX + 'slides.js';
|
||||
var s = document.getElementsByTagName('script')[0];
|
||||
s.parentNode.insertBefore(script, s);
|
||||
|
||||
// Remove this script
|
||||
s.parentNode.removeChild(s);
|
||||
} else {
|
||||
initialize();
|
||||
}
|
||||
|
||||
/* Synchronize windows when notes are enabled */
|
||||
|
||||
function setupNotesSync() {
|
||||
if (!notesEnabled) return;
|
||||
|
||||
localStorage.setItem(destSlideKey(), curSlide);
|
||||
window.addEventListener('storage', updateOtherWindow, false);
|
||||
}
|
||||
|
||||
// An update to local storage is caught only by the other window
|
||||
// The triggering window does not handle any sync actions
|
||||
function updateOtherWindow(e) {
|
||||
// Ignore remove storage events which are not meant to update the other window
|
||||
var isRemoveStorageEvent = !e.newValue;
|
||||
if (isRemoveStorageEvent) return;
|
||||
|
||||
var destSlide = localStorage.getItem(destSlideKey());
|
||||
while (destSlide > curSlide) {
|
||||
nextSlide();
|
||||
}
|
||||
while (destSlide < curSlide) {
|
||||
prevSlide();
|
||||
}
|
||||
|
||||
updateNotes();
|
||||
}
|
||||
Reference in New Issue
Block a user