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index.html
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<html lang="en">
<head>
<title>Glimmer w/ Highlight.js</title>
<meta charset="utf-8" />
<meta name="description" content="Glimmer syntax highlighting powered by Highlight.js" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<!-- Highlight.JS does not ship ES Modules to CDNs... yet! -->
<script src="https://cdn.jsdelivr.net/npm/@highlightjs/cdn-assets@11.0.0-alpha0/highlight.js"></script>
<script src="https://cdn.jsdelivr.net/npm/@highlightjs/cdn-assets@11.0.0-alpha0/languages/javascript.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/@highlightjs/cdn-assets@11.0.0-alpha0/languages/css.min.js"></script>
<!-- Hybrid Theme! -->
<link
rel="stylesheet"
href="https://cdn.jsdelivr.net/npm/@highlightjs/cdn-assets@11.0.0-alpha0/styles/tomorrow-night.min.css"
integrity="sha256-SamwRCKvsKZ8zqKto5n4ytPPKOhPbBTbJdhJJK4Fjhw="
crossorigin="anonymous"
/>
<link
rel="stylesheet"
href="https://cdn.jsdelivr.net/npm/@highlightjs/cdn-assets@11.0.0-alpha0/styles/atom-one-dark-reasonable.min.css"
integrity="sha256-4rrI7w9n2l7crFHzQhumwTmY2FsIUlDA5JlQ8bRicmc="
crossorigin="anonymous"
/>
<!-- We need to highlight some new features of hljs -->
<style type="text/css">
.hljs-punctuation {
color: #a9c;
}
.hljs-attribute {
color: #d38fae;
}
.hljs-property {
color: #feb39f;
}
.hljs-class {
color: #88f;
}
.hljs-operator {
color: #959;
}
.hljs-comment {
color: #888;
}
</style>
<script type="importmap">
{
"imports": {
"@starbeam/collections": "https://esm.run/@starbeam/collections@0.8.9",
"@starbeam/universal": "https://esm.run/@starbeam/universal@0.8.9",
"@starbeam/js": "https://esm.run/@starbeam/js@0.8.9",
"highlightjs-glimmer": "./highlightjs-glimmer/src/index.js"
}
}
</script>
<!-- For testing this library -->
<script type="module">
// import { reactive } from "@starbeam/collections";
import { reactive } from '@starbeam/js';
import { Cell, DEBUG_RENDERER } from '@starbeam/universal';
import { setup } from 'highlightjs-glimmer';
/* global hljs */
import * as samples from './demo/samples.js';
setup(hljs);
function QPs() {
let parsed = new URLSearchParams(location.search);
let data = reactive.Map();
for (let [key, value] of parsed.entries()) {
data.set(key, value);
}
return data;
}
class State {
qps = QPs();
#title = Cell('highlight.js Glimmer');
get title() {
return this.#title.current;
}
set title(value) {
this.#title.set(value);
}
get isDebugging() {
return this.qps.get('debug') === 'true';
}
get isEditing() {
return this.qps.get('edit') === 'true';
}
get code() {
if (this.isEditing) {
return this.qps.get('code');
}
return this.currentSample?.sample;
}
get language() {
if (this.qps.get('language')) {
return this.qps.get('language');
}
return this.currentSample?.language;
}
get currentSampleKey() {
let validKeys = Object.keys(samples);
let fromQP = this.qps.get('sample');
return validKeys.includes(fromQP) ? fromQP : 'glimmer';
}
get currentSample() {
return samples[this.currentSampleKey];
}
navigateTo = (href, title = document.title) => {
if (location.href.endsWith(href)) return;
this.title = title;
let qps = new URLSearchParams(new URL(href).search);
this.qps.clear();
for (let [key, value] of qps.entries()) {
this.qps.set(key, value);
}
if (this.isEditing) {
this.qps.set('code', this.currentSample?.sample);
}
};
}
let state = new State();
// for debugging / inspecting
Object.assign(window, { hljs, state });
// Update Query Params
// We have a reactive implementation,
// but we don't read from the URL except initilly
// this exists to keep the URL updated so that we can refresh
// and expect the same page as before the refresh
DEBUG_RENDERER.render({
render: () => {
let qps = new URLSearchParams(state.qps.entries());
return {
href: `?${qps}`,
title: state.title,
};
},
debug: (data) => {
history.pushState(null, data.title, data.href);
},
});
DEBUG_RENDERER.render({
render: () => {
console.log('isDebugging', [...state.qps.entries()]);
return state.isDebugging;
},
debug: (isDebugging) => {
if (isDebugging) {
document.body.classList.add('debug-classes');
return;
}
document.body.classList.remove('debug-classes');
},
});
function setFormState() {
let form = document.querySelector('#editor');
// Push the current code in to the editable var, `code`
state.qps.set('code', state.code);
// Populate form state
let code = form.querySelector('textarea');
let language = form.querySelector('select');
if (state.qps.get('sample')) {
let info = state.currentSample;
code.value = info.sample;
language.value = code.language;
}
if (state.qps.get('code')) {
code.value = state.qps.get('code');
}
if (state.qps.get('language')) {
language.value = state.qps.get('language');
}
}
DEBUG_RENDERER.render({
render: () => {
console.log('isEditing', [...state.qps.entries()]);
return state.isEditing;
},
debug: (isEditing) => {
let form = document.querySelector('#editor');
if (isEditing) {
form.classList.remove('hidden');
setFormState();
} else {
form.classList.add('hidden');
}
},
});
DEBUG_RENDERER.render({
render: () => {
return `
<span>Samples:</span>
${Object.entries(samples)
.map(([key, data]) => {
// Each link needs its own copy of the qps
let qps = new URLSearchParams(state.qps.entries());
qps.set('sample', key);
return `
<a href="?${qps}" data-name="${data.name}">
${data.name}
</a>
`;
})
.join('')}
`;
},
debug: (html) => {
document.getElementById('samples').innerHTML = html;
},
});
DEBUG_RENDERER.render({
render: () => {
let debugQps = new URLSearchParams(state.qps);
let editQps = new URLSearchParams(state.qps);
debugQps.set('debug', !state.isDebugging);
editQps.set('edit', !state.isEditing);
let editHref = `/?${editQps}`;
let debugHref = `/?${debugQps}`;
return `
<a class="debug" href="${debugHref}">Debug</a>
|
<a class="edit" href="${editHref}">Edit</a>
`;
},
debug: (html) => {
document.getElementById('dev').innerHTML = html;
},
});
DEBUG_RENDERER.render({
render: () => {
// Something is wrong with reactive.Map or the renderer,
// When there is no sample, we still ask for:
// - state.code:
// - qps.get('edit')
// - false:
// - qps.get('code')
// - true:
// - qps.get('sample')
console.log('Highlighting', [...state.qps.entries()]);
return {
code: state.code,
language: state.language,
};
},
debug: ({ code, language }) => {
let output = document.getElementById('sample-output');
let preview = output.querySelector('code');
let existingLanguage = [...preview.classList].find((cssClass) =>
cssClass.startsWith('language-')
);
preview.classList.remove(existingLanguage);
preview.classList.add(`language-${language}`);
preview.innerHTML = hljs.highlight(code.trim(), { language }).value;
},
});
/**
* No need to add event listeners and manage removing them on
* state updates when we can just use event delegation
*/
document.addEventListener('click', (e) => {
if (e.target instanceof HTMLAnchorElement) {
let url = new URL(e.target.href);
if (url.origin !== location.origin) return;
e.preventDefault();
let name = e.target.getAttribute('data-name');
if (name) {
state.navigateTo(e.target.href, name);
} else {
state.navigateTo(e.target.href);
}
}
});
function _handleInput(event) {
let formData = new FormData(event.currentTarget);
let data = Object.fromEntries(formData.entries());
console.log('FormData', { ...data });
state.qps.delete('sample');
state.qps.set('code', data.code);
state.qps.set('language', data.language);
}
let formElement = document.querySelector('#editor');
formElement.addEventListener('input', _handleInput);
formElement.addEventListener('submit', (event) => {
event.preventDefault();
_handleInput(event);
});
</script>
<style>
@font-face {
font-family: dejavu-sans-mono;
src: url('./demo/DejaVuSansMono.ttf');
}
html,
body {
background-color: #181c24;
color: white;
padding: 0;
margin: 0;
font-family: system-ui, arial, sans-serif;
line-height: 1.35rem;
}
code {
font-family: dejavu-sans-mono, ui-monospace, monospace, sans-serif;
}
pre {
margin: 0;
}
pre code.hljs {
padding: 1rem;
}
section {
padding: 1rem;
}
section nav {
display: flex;
gap: 0.5rem;
}
section div {
display: flex;
gap: 1rem;
align-items: center;
flex-wrap: wrap;
}
a {
color: #61aeee;
}
a.active {
color: #71beae;
}
hr {
margin: 1rem 0;
border: 1px solid black;
}
#samples {
display: flex;
flex-direction: row;
gap: 1rem;
flex-wrap: wrap;
}
#dev {
position: fixed;
bottom: 1rem;
right: 1rem;
}
#editor {
display: grid;
gap: 0.5rem;
}
#editor label {
display: flex;
gap: 0.5rem;
}
#editor [name='code'] {
width: 100%;
height: 350px;
}
#editor.hidden {
display: none;
}
.debug-classes pre code span {
display: inline-block;
align-items: baseline;
padding: 0.25rem;
padding-bottom: 0.125rem;
padding-top: 0.5rem;
margin: 0.5rem 0.25rem 0rem 0.25rem;
border: 1px dashed #777;
border-radius: 5px;
white-space: pre;
position: relative;
}
.debug-classes pre code span:before {
display: inline-block;
content: attr(class);
font-size: 70%;
background: #693;
line-height: 1rem;
padding: 1px 4px;
border-radius: 2px;
color: white;
margin-right: 0.25rem;
font-weight: normal;
position: absolute;
top: -0.5rem;
left: -0.25rem;
}
.debug-classes pre code span:after {
/* this hidden element is for stretching the span
to be at least the width of the before pseudo element */
display: block;
opacity: 0;
font-size: 70%;
content: attr(class);
margin-top: -1.4rem;
position: relative;
top: -1rem;
left: -100%;
}
</style>
</head>
<body>
<section>
<h1>Glimmer for highlight.js</h1>
<div>
<nav>
<a href="https://github.com/NullVoxPopuli/highlightjs-glimmer" target="_blank">GitHub</a>
<a href="https://www.npmjs.com/package/highlightjs-glimmer" target="_blank">NPM</a>
</nav>
<code>npm install highlightjs-glimmer</code>
</div>
<hr />
<nav id="samples">
<span>Samples:</span>
</nav>
<form id="editor" class="hidden">
<label>
Language
<select name="language">
<option value="glimmer-javascript">Glimmer JS</option>
<option value="glimmer-typescript">Glimmer TS</option>
<option value="javascript">JS</option>
<option value="typescript">TS</option>
<option value="handlebars">hbs</option>
<option value="glimmer">Glimmer</option>
</select>
</label>
<label>
Edit
<textarea name="code"></textarea>
</label>
</form>
</section>
<pre id="sample-output">
<code class="language-glimmer hljs">
</code>
</pre>
<div id="dev">
<a class="debug" href="#">Debug</a>
|
<a class="edit" href="#">Edit</a>
</div>
</body>
</html>