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Add controls and SPA routing

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This commit is contained in:
Jeremy Likness 2019-11-22 16:37:45 -08:00
parent 3ef6273404
commit d66f8c5db4
10 changed files with 185 additions and 50 deletions
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37
css/style.css
View File

@ -20,28 +20,39 @@ img {
height: auto; height: auto;
} }
div#main { .footer {
float: left;
height: 15vh;
font-size: 1.5em;
vertical-align: middle;
width: 32vw;
}
.right {
text-align: right;
}
.left {
text-align: left;
}
.center {
text-align: center;
}
slide-deck div {
height: 80vh; height: 80vh;
padding: 1em; padding: 1em;
background: lightgray; background: lightgray;
} }
div#footer-left { slide-controls {
vertical-align: middle;
height: 15vh; height: 15vh;
width: 33vw;
text-align: center;
float: left; float: left;
} }
div#footer-left img {
display: inline-block;
}
div#footer-right {
font-size: 2em;
height: 15vh;
float: right;
}
nextslide { nextslide {
display: none; display: none;
} }

13
index.html
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@ -15,14 +15,15 @@
<body> <body>
<script type="module" src="./js/app.js"></script> <script type="module" src="./js/app.js"></script>
<div id="main"> <slide-deck id="main" start="001-title">
<h1>DevNexus</h1> <h1>DevNexus | Vanilla.js: Modern 1st Party JavaScript</h1>
<h2>We are getting things ready...</h2> <h2>Setting things up ...</h2>
</div> </slide-deck>
<div id="footer-left"> <div class="footer left">
<img src="./images/devnexus.png" alt="DevNexus logo" title="DevNexus logo" /> <img src="./images/devnexus.png" alt="DevNexus logo" title="DevNexus logo" />
</div> </div>
<div id="footer-right"> <slide-controls deck="main" class="footer center">---</slide-controls>
<div class="footer right">
<a href="https://twitter.com/JeremyLikness">@JeremyLikness</a> <a href="https://twitter.com/JeremyLikness">@JeremyLikness</a>
</div> </div>
</body> </body>

21
js/app.js
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@ -1,23 +1,10 @@
import { getJson } from "./jsonLoader.js" import { registerDeck } from "./navigator.js"
import { loadSlides } from "./slideLoader.js" import { registerControls } from "./controls.js"
import { Navigator } from "./navigator.js"
const state = {
manifest: {}
};
const app = async () => { const app = async () => {
state.deck = document.getElementById("main"); registerDeck();
registerControls();
// load the manifest
state.manifest = await getJson("slides/manifest.json");
// load the slides
state.slides = await loadSlides(state.manifest.start);
// initialize the navigation
state.navigator = new Navigator(state.slides, state.deck);
}; };
document.addEventListener("DOMContentLoaded", app); document.addEventListener("DOMContentLoaded", app);

54
js/controls.js vendored Normal file
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@ -0,0 +1,54 @@
class Controls extends HTMLElement {
constructor() {
super();
this._controlRef = null;
this._deck = null;
}
async connectedCallback() {
const response = await fetch("/templates/controls.html");
const template = await response.text();
this.innerHTML = "";
const host = document.createElement("div");
host.innerHTML = template;
this.appendChild(host);
this._controlRef = {
first: document.getElementById("ctrlFirst"),
prev: document.getElementById("ctrlPrevious"),
next: document.getElementById("ctrlNext"),
last: document.getElementById("ctrlLast"),
pos: document.getElementById("position")
};
this._controlRef.first.addEventListener("click", () => this._deck.jumpTo(0));
this._controlRef.prev.addEventListener("click", () => this._deck.previous());
this._controlRef.next.addEventListener("click", () => this._deck.next());
this._controlRef.last.addEventListener("click", () => this._deck.jumpTo(this._deck.totalSlides - 1));
this.refreshState();
}
static get observedAttributes() {
return ["deck"];
}
async attributeChangedCallback(attrName, oldVal, newVal) {
if (attrName === "deck") {
if (oldVal !== newVal) {
this._deck = document.getElementById(newVal);
this._deck.addEventListener("slideschanged", () => this.refreshState());
}
}
}
refreshState() {
const next = this._deck.hasNext;
const prev = this._deck.hasPrevious;
this._controlRef.first.disabled = !prev;
this._controlRef.prev.disabled = !prev;
this._controlRef.next.disabled = !next;
this._controlRef.last.disabled = !next;
this._controlRef.pos.innerText = `${this._deck.currentIndex + 1} / ${this._deck.totalSlides}`;
}
}
export const registerControls = () => customElements.define('slide-controls', Controls);

57
js/navigator.js
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@ -1,9 +1,43 @@
export class Navigator { import { loadSlides } from "./slideLoader.js"
import { Router } from "./router.js"
constructor(slides, deck) { class Navigator extends HTMLElement {
this._deck = deck;
this._slides = slides; constructor() {
this.jumpTo(0); super();
this._router = new Router();
this._route = this._router.getRoute();
this.slidesChangedEvent = new CustomEvent("slideschanged", {
bubbles: true,
cancelable: false
});
this._router.eventSource.addEventListener("routechanged", () => {
if (this._route !== this._router.getRoute()) {
this._route = this._router.getRoute();
if (this._route) {
var slide = parseInt(this._route) - 1;
this.jumpTo(slide);
}
}
});
}
static get observedAttributes() {
return ["start"];
}
async attributeChangedCallback(attrName, oldVal, newVal) {
if (attrName === "start") {
if (oldVal !== newVal) {
this._slides = await loadSlides(newVal);
this._route = this._router.getRoute();
var slide = 0;
if (this._route) {
slide = parseInt(this._route) - 1;
}
this.jumpTo(slide);
}
}
} }
get currentIndex() { get currentIndex() {
@ -11,11 +45,11 @@ export class Navigator {
} }
get currentSlide() { get currentSlide() {
return this._slides[this._currentIndex]; return this._slides ? this._slides[this._currentIndex] : null;
} }
get totalSlides() { get totalSlides() {
return this._slides.length; return this._slides ? this._slides.length : 0;
} }
get hasPrevious() { get hasPrevious() {
@ -29,8 +63,11 @@ export class Navigator {
jumpTo(slideIdx) { jumpTo(slideIdx) {
if (slideIdx >= 0 && slideIdx < this.totalSlides) { if (slideIdx >= 0 && slideIdx < this.totalSlides) {
this._currentIndex = slideIdx; this._currentIndex = slideIdx;
this._deck.innerHTML = ''; this.innerHTML = '';
this._deck.appendChild(this.currentSlide.html); this.appendChild(this.currentSlide.html);
this._router.setRoute(slideIdx+1);
this._route = this._router.getRoute();
this.dispatchEvent(this.slidesChangedEvent);
} }
} }
@ -46,3 +83,5 @@ export class Navigator {
} }
} }
} }
export const registerDeck = () => customElements.define('slide-deck', Navigator);

30
js/router.js Normal file
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@ -0,0 +1,30 @@
export class Router {
constructor() {
this._eventSource = document.createElement("div");
this._routeChanged = new CustomEvent("routechanged", {
bubbles: true,
cancelable: false
});
this._route = null;
window.addEventListener("popstate", () => {
if (this.getRoute() !== this._route) {
this._route = this.getRoute();
this._eventSource.dispatchEvent(this._routeChanged);
}
});
}
get eventSource() {
return this._eventSource;
}
setRoute(route) {
window.location.hash = route;
this._route = route;
}
getRoute() {
return window.location.hash.substr(1).replace(/\//ig, "/");
}
}

4
js/slideLoader.js
View File

@ -11,10 +11,10 @@ export async function loadSlides(start) {
const slides = []; const slides = [];
const cycle = {}; const cycle = {};
while (next) { while (next) {
if (!cycle[next]) {
cycle[next] = true;
const nextSlide = await loadSlide(next); const nextSlide = await loadSlide(next);
if (!cycle[nextSlide.title]) {
slides.push(nextSlide); slides.push(nextSlide);
cycle[nextSlide.title] = nextSlide;
next = nextSlide.nextSlide; next = nextSlide.nextSlide;
} }
else { else {

1
slides/002-stuff.html
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@ -1,2 +1,3 @@
<title>More Stuff</title> <title>More Stuff</title>
<h1>More Stuff</h1> <h1>More Stuff</h1>
<nextslide>003-morestuff</nextslide>

7
slides/003-morestuff.html Normal file
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@ -0,0 +1,7 @@
<title>More Stuff</title>
<h1>This is even more stuff</h1>
<p>Lorem jalskdjflkasdjflkasd jkjdsaflkdsj kldsjflksdjdlk klsdjflkasjlksj kjdsf
asdklfjlkfjk laskdjfladskjf
asldfkjlkddj
asldfjlkfjjkjlff
</p>

5
templates/controls.html Normal file
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@ -0,0 +1,5 @@
<button id="ctrlFirst">⏮</button>
<button id="ctrlPrevious">⏪</button>
<span id="position">?/?</span>
<button id="ctrlNext">▶</button>
<button id="ctrlLast">⏭</button>