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index.html
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<!DOCTYPE html>
<meta charset="utf-8">
<title>Diapo</title>
<diapo class="flex center-x center-y">
<h1>Welcome to diapo!</h1>
</diapo>
<diapo>
<h1>Second diapo</h1>
<p>A small text content on 1 line.</p>
</diapo>
<diapo style="background: #3f99f4; color: #fff;">
<h1>Third diapo</h1>
<p>A list of things on a colored background:</p>
<ul>
<li>first thing</li>
<li>second thing</li>
</ul>
</diapo>
<diapo>
<h1>Fourth with table</h1>
<table>
<tr>
<th></th>
<th>Col 1</th>
<th>Col 2</th>
<th>Col 3</th>
</tr>
<tr>
<th>Row 1</th>
<td></td>
<td>×</td>
<td></td>
</tr>
<tr>
<th>Row 2</th>
<td></td>
<td></td>
<td>×</td>
</tr>
</table>
</diapo>
<diapo>
<h1>Fifth diapo with code</h1>
<pre><code>
function add (a, b) {
return a + b
}
const sum = [4, 2, 1].reduce(add, 0)
</code></pre>
</diapo>
<diapo class="flex col center-x center-y" style="background: white;">
<h1>Make your own:</h1>
<h2><a href="https://byteclubfr.github.io/diapo/">https://byteclubfr.github.io/diapo/</a></h2>
</diapo>
<template>
<h1>New list</h1>
<ul>
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
</ul>
</template>
<template class="flex center-x center-y">
<h1>New diapo with centered title</h1>
</template>
<template class="flex center-x" style="background: hotpink;">
<h1>With bright style</h1>
</template>
<!-- diapo engine: here be dragons -->
<style>
* {
box-sizing: border-box;
}
html, body {
margin: 0;
padding: 0;
overflow: hidden;
}
html {
background: #fff;
}
body {
background: #eee;
color: #333;
width: 800px; height: 600px;
margin-left: -400px; margin-top: -300px;
position: absolute; top: 50%; left: 50%;
font-family: Arial, Helvetica, sans-serif;
display: none;
}
body.loaded {
display: block;
}
a {
color: #333;
}
table td, table th {
background: rgba(255, 255, 255, 0.2);
text-align: center;
padding: .5em;
}
diapo {
background: #ddd;
width: 100%; height: 100%;
display: block;
position: absolute;
padding: 10px;
transition: left 300ms ease-in 0s;
}
diapo { left: -100% } /* Before */
diapo[aria-selected] { left: 0 } /* Now */
diapo[aria-selected] ~ diapo { left: +100% } /* After */
diapo[contenteditable] { background: #ccc; }
diapo.flex { display: flex; }
diapo.center-x { justify-content: center; }
diapo.center-y { align-items: center; }
diapo.col { flex-direction: column; }
diapo.row { flex-direction: row; }
diapo img {
max-width: 100%;
}
textarea.edit {
width: 100%; height: 100%;
display: block;
padding: 10px;
position: absolute;
border: 0;
background: rgba(255, 255, 255, 0.9)
}
.veil {
background: rgba(255, 255, 255, 0.9);
height: 100%;
position: absolute;
width: 100%;
z-index: 2;
}
form {
position: absolute;
z-index: 3;
}
form.file {
background: rgba(255, 255, 255, 0.9);
padding: 2em;
left: 30%;
top: 40%;
}
form.templates {
display: flex;
flex-wrap: wrap;
width: 100%;
}
form .template {
cursor: pointer;
border-radius: 30px;
height: 600px;
left: 0;
margin-bottom: -450px;
margin-right: -600px;
position: relative;
transform-origin: 0 0;
transform: scale(.25);
width: 800px;
}
form .template:hover::before {
background: rgba(0, 0, 0, 0.5);
border-color: #fff;
border-radius: 30px;
border-style: solid;
border-width: 150px 75px 150px 75px;
box-sizing: border-box;
content: '';
display: block;
height: 100%;
left: 0;
position: absolute;
top: 0;
width: 100%;
}
form .cross {
background: none;
border: 0;
cursor: pointer;
font-size: 2rem;
position: absolute;
right: 0;
top: 0;
z-index: 1;
}
nav {
align-items: flex-end;
display: flex;
justify-content: space-between;
}
nav.ui {
bottom: 0; width: 100%;
position: absolute;
}
nav.collapsed {
justify-content: center;
}
nav.bar-diapo, nav.bar-diaporama {
justify-content: center;
position: relative;
width: 50%;
}
nav.edit {
justify-content: center;
width: 100%;
}
nav.sub {
align-items: stretch;
flex-direction: column-reverse;
z-index: 1;
}
nav.sub.collapsed button {
display: none;
}
nav.sub.collapsed button:first-child {
display: inline;
}
nav h2 {
bottom: 3.5em;
font-size: 12px;
margin: 0;
position: absolute;
text-align: center;
width: 100%;
}
nav button {
background: rgba(255, 255, 255, .5);
border: 0;
cursor: pointer;
flex: 0;
font-size: 12px;
margin: 0 2px;
min-height: 3em;
white-space: nowrap;
}
nav button:hover {
background: rgba(255, 255, 255, .8);
}
nav button[disabled] {
background: none;
cursor: default;
color: #333;
opacity: 0.2;
}
nav button.toggle {
background: none;
flex: 0;
}
nav button.save {
background: #cfc;
font-weight: bold;
}
nav button.edit {
min-width: 66px;
}
nav button.go {
min-width: 3em;
}
nav.edit button {
min-width: 30%;
}
nav .counter {
padding: .5em;
white-space: nowrap;
}
</style>
<script>
(function (body) {
body.classList.remove('loaded')
const MODE = {
NORMAL: 1, CONTENT: 2, HTML: 4
}
const state = {
index: 0,
total: 0,
mode: MODE.NORMAL,
ui: true, // visible ?,
sub: null // sub navs
}
let ui // created at runtime
let backup
// CRUD
// current
const getDiapo = () => $('diapo[aria-selected]')
const injectDiapo = (position, diapo) => {
const current = getDiapo()
if (position === 'before') {
body.insertBefore(diapo, current)
state.index++
} else {
body.insertBefore(diapo, current.nextSibling)
}
state.total++
toggleTemplates()
setHash(position === 'before' ? state.index - 1 : state.index + 1)
}
const deleteDiapo = () => {
getDiapo().remove()
if (state.index === state.total) state.index--
state.total--
goTo(state.index)
}
const moveDiapo = (position) => {
const diapos = $$('diapo')
const current = diapos[state.index - 1]
state.sub = null
if (position === 'before') {
current.parentNode.insertBefore(current, diapos[state.index - 2])
setHash(state.index - 1)
} else {
current.parentNode.insertBefore(diapos[state.index], current)
setHash(state.index + 1)
}
}
const editDiapoContent = () => {
backup = getDiapo().innerHTML
getDiapo().setAttribute('contenteditable', 'true')
state.mode = MODE.CONTENT
state.sub = null
refreshUI()
}
const editDiapoHTML = () => {
let input
backup = getDiapo().innerHTML
const update = () => {
getDiapo().innerHTML = input.value
}
input = E('textarea', {
className: 'edit',
innerHTML: getDiapo().innerHTML,
onkeyup: update
})
append(body, input)
state.mode = MODE.HTML
state.sub = null
refreshUI()
}
const saveDiapoContent = () => {
getDiapo().removeAttribute('contenteditable')
}
const saveDiapoHTML = () => {
$('textarea.edit').remove()
}
const saveDiapo = () => {
switch (state.mode) {
case MODE.NORMAL: return
case MODE.CONTENT: saveDiapoContent(); break
case MODE.HTML: saveDiapoHTML(); break
}
state.mode = MODE.NORMAL
refreshUI()
}
const resetDiapo = () => {
getDiapo().innerHTML = backup
saveDiapo()
}
// ui
const toggleImageInput = () => {
let form = $('form.file')
if (form) return form.remove()
form = E('form', {
className: 'file',
onsubmit: (e) => e.preventDefault()
})
const cross = E('button', {
className: 'cross',
textContent: '×',
onclick: toggleImageInput
})
const input = E('input', {
type: 'file',
name: 'file',
onchange: function () {
const file = this.files[0]
if (!file.type.match(/image.*/)) return
const img = E("img")
append(getDiapo(), img)
const reader = new FileReader()
reader.onload = (e) => img.src = e.target.result
reader.readAsDataURL(file)
form.remove()
}
})
append(body, append(form, cross, input))
}
const toggleVeil = () => {
let veil = $('.veil')
if (veil) return veil.remove()
veil = E('div', { className: 'veil' })
append(body, veil)
}
const toggleTemplates = () => {
toggleVeil()
let form = $('form.templates')
if (form) return form.remove()
form = E('form', {
className: 'templates',
onsubmit: (e) => e.preventDefault()
})
const cross = E('button', {
className: 'cross',
textContent: '×',
onclick: toggleTemplates
})
let templates = [getDiapo(), ...$$('template')].map(t => {
return E('diapo', {
className: `template ${t.className}`,
innerHTML: t.innerHTML,
style: t.style,
onclick: function () { this.onclick = null; injectDiapo('after', this); }
})
})
append(body, append(form, cross, ...templates))
}
const createDiapoBar = () =>
append(
E('nav', { className: 'bar-diapo' }),
E('h2', { textContent: 'Diapo' }),
append(
E('nav', { className: `sub ${state.sub !== 'move' && 'collapsed'}` }),
E('button', {
textContent: `${state.sub === 'move' ? '▼' : '▲'} Move`,
onclick: () => {
state.sub = !state.sub ? 'move' : null
refreshUI()
}
}),
E('button', {
textContent: 'After',
onclick: () => moveDiapo('after'),
disabled: state.index === state.total
}),
E('button', {
textContent: 'Before',
onclick: () => moveDiapo('before'),
disabled: state.index === 1
})
),
E('button', {
textContent: 'Delete',
onclick: () => {
if (confirm('Are you sure you want to delete this diapo?')) deleteDiapo()
}
}),
E('button', {
textContent: 'Add image',
onclick: () => {
toggleImageInput()
}
}),
append(
E('nav', { className: `sub ${state.sub !== 'edit' && 'collapsed'}` }),
E('button', {
className: 'edit',
textContent: `${state.sub === 'edit' ? '▼' : '▲'} Edit`,
onclick: () => {
state.sub = !state.sub ? 'edit' : null
refreshUI()
}
}),
E('button', {
textContent: state.mode === MODE.CONTENT ? 'Save content' : 'In place',
onclick: () => {
state.mode === MODE.CONTENT ? saveDiapo() : editDiapoContent()
}
}),
E('button', {
textContent: state.mode === MODE.HTML ? 'Save HTML' : 'As HTML',
onclick: () => {
state.mode === MODE.HTML ? saveDiapo() : editDiapoHTML()
}
})
)
)
const createDiaporamaBar = () =>
append(
E('nav', { className: 'bar-diaporama' }),
E('h2', { textContent: 'Diaporama' }),
E('button', {
textContent: '|◀◀',
onclick: () => goStart(),
disabled: state.index === 1
}),
E('button', {
className: 'go',
textContent: '◀',
onclick: () => goBack(),
disabled: state.index === 1
}),
E('button', {
textContent: 'Create diapo',
onclick: toggleTemplates
}),
E('div', {
className: 'counter',
textContent: `${state.index} / ${state.total}`
}),
E('button', {
className: 'go',
textContent: '▶',
onclick: () => goForward(),
disabled: state.index === state.total
}),
E('button', {
textContent: '▶▶|',
onclick: () => goEnd(),
disabled: state.index === state.total
})
)
const createEditBar = () =>
append(
E('nav', {
className: 'edit'
}),
E('button', {
textContent: 'Reset',
onclick: resetDiapo
}),
E('button', {
className: 'save',
textContent: 'Save',
onclick: saveDiapo
})
)
const refreshUI = () => {
if (ui) ui.remove() // re-rendering UI should be lightweight
ui = E('nav', { className: `ui ${!state.ui && 'collapsed'}` })
const toggle = E('button', {
className: 'toggle',
textContent: state.ui ? '▼' : '▲',
title: 'Toggle toolbar',
onclick: () => {
state.ui = !state.ui
refreshUI()
}
})
let children
if (state.mode === MODE.NORMAL) {
children = state.ui
? [createDiapoBar(), toggle, createDiaporamaBar()]
: [toggle]
} else {
children = [createEditBar()]
}
append(body, append(ui, ...children))
}
// navigation
const goTo = (index) => {
state.index = index
const current = getDiapo()
const next = $(`diapo:nth-of-type(${ index })`)
if (current) current.removeAttribute('aria-selected')
if (next) next.setAttribute('aria-selected', 'true')
refreshUI()
}
const goBack = () => {
if (state.index > 1) setHash(state.index - 1)
}
const goForward = () => {
if (state.index !== state.total) setHash(state.index + 1)
}
const goStart = () => {
setHash(1)
}
const goEnd = () => {
setHash(state.total)
}
const onKeyDown = (e) => {
const { keyCode } = e
// don't intercept keyboard chords
if (e.altKey || e.ctrlKey || e.metaKey || e.shiftKey) return
if (state.mode !== MODE.NORMAL) return
switch (keyCode) {
case 33: goStart(); break; // page up
case 34: goEnd(); break; // page down
case 37: case 38: goBack(); break; // left, up
case 39: case 40: goForward(); break; // right, down
default: return
}
e.preventDefault()
}
const onHashChange = () => {
const index = Number(window.location.hash.split('#')[1]) || 1
if (index !== state.index) goTo(index)
}
const setHash = (index) => {
window.location.hash = `#${index}`
}
// edit mode
const onDoubleClick = (e) => {
e.preventDefault()
if (e.target.tagName !== 'DIAPO') return
e.target.setAttribute('contenteditable', 'true')
}
// scale
const onResize = () => {
const w = body.clientWidth / window.innerWidth
const h = body.clientHeight / window.innerHeight
body.style.transform = `scale(${ 1 / Math.max(w, h) })`
}
// let's roll
const init = () => {
ui = $('nav.ui') // delete saved one
onHashChange()
body.className = 'loaded'
state.total = $$('diapo').length
onResize()
refreshUI()
window.onkeydown = onKeyDown
window.ondblclick = onDoubleClick
window.onresize = onResize
window.onhashchange = onHashChange
}
window.onload = init
})(document.body)
</script>
<script>
// global helpers
function E (tag, props) {
const elt = document.createElement(tag)
if (props) {
for (let p in props) {
if ('style' === p) {
for (let s in props[p]) {
elt.style[s] = props[p][s]
}
} else {
elt[p] = props[p]
}
}
}
return elt
}
function append (parent, ...children) {
children.forEach(c => parent.appendChild(c))
return parent
}
var $ = (HTMLElement.prototype.$ = function(q) {
return this.querySelector(q)
}).bind(document)
var $$ = (HTMLElement.prototype.$$ = function(q) {
return this.querySelectorAll(q)
}).bind(document)
</script>