The names of fonts are rendered using the corresponding font.
Each font's name is rendered to an OffscreenCanvas, and that image is cached in OPFS. There's a list of links to download font files in the preview.
This commit is contained in:
Christian Lawson-Perfect
parent
51d57259b0
commit
a4b046a784
3 changed files with 165 additions and 15 deletions
27
index.html
27
index.html
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@ -9,21 +9,24 @@
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<link rel="stylesheet" href="style.css">
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</head>
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<body>
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<header>
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<h1>Fontsource font preview</h1>
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</header>
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<main>
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<section id="intro" class="fixed-font">
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<p>This page shows fonts loaded from <a href="https://fontsource.org">Fontsource</a>.</p>
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</section>
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<section id="controls" class="fixed-font">
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<nav>
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<section id="controls">
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<label for="font-family">Font:</label>
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<select id="font-family">
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</select>
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<button type="button" id="random-font">I'm feeling lucky</button>
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</section>
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<ul id="font-list"></ul>
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</nav>
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<main>
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<header>
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<h1>Fontsource font preview</h1>
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</header>
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<section id="intro">
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<p>This page shows fonts loaded from <a href="https://fontsource.org">Fontsource</a>.</p>
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</section>
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<section id="info">
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<h2>About this font</h2>
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@ -52,6 +55,12 @@
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</section>
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<section id="files">
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<h2>Files</h2>
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<ul id="file-links">
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</ul>
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</section>
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<section id="code">
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<h2>CSS</h2>
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<pre id="css-display"></pre>
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84
script.js
84
script.js
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@ -79,7 +79,8 @@ const css_template = (info,range,weight,style,variable_info) => {
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if(axes.includes('slnt')) {
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extras.push(` font-style: oblique ${variable_info.axes.slnt.min}deg ${variable_info.axes.slnt.max}deg;`);
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}
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}
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}
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if(info.variable) {
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return `
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@ -113,6 +114,52 @@ async function fetch_json(url) {
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}
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async function draw_font_preview(f) {
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const d = await navigator.storage.getDirectory();
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const filename = `${f.family}.png`;
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let fh;
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try {
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fh = await d.getFileHandle(filename);
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} catch(e) {
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const style = document.createElement('style');
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try {
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document.head.append(style);
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const info = await fetch_json(font_info_url(f.id));
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const variable_info = info.variable ? await fetch_json(variable_info_url(info.id)) : {};
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const css = css_template(info,info.defSubset,info.weights[0],'normal',variable_info);
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style.textContent += css;
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await new Promise((resolve,reject) => {
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setTimeout(async () => {
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const ffs = Array.from(document.fonts).filter(ff=>ff.family == `"${f.family}"`);
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await Promise.all(ffs.map(ff => ff.load())).catch(reject)
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resolve();
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},1);
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});
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} catch(e) {
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return;
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}
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const cv = new OffscreenCanvas(1,1);
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const ctx = cv.getContext('2d');
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const font_style = `100px "${f.family}"`;
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ctx.font = font_style;
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const {width, fontBoundingBoxAscent, fontBoundingBoxDescent} = ctx.measureText(f.family);
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cv.width = width;
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cv.height = fontBoundingBoxAscent + fontBoundingBoxDescent;
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ctx.font = font_style;
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ctx.fillText(f.family,0,fontBoundingBoxAscent);
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const blob = await cv.toBlob();
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fh = await d.getFileHandle(filename,{create:true});
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const w = await fh.createWritable();
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await w.write(blob);
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await w.close();
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window.blob = blob;
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style.parentElement.removeChild(style);
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}
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const file = await fh.getFile();
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return URL.createObjectURL(file);
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}
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async function go() {
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let [fonts, axes_info] = await Promise.all([
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@ -120,14 +167,20 @@ async function go() {
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fetch_json('https://api.fontsource.org/v1/axis-registry')
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]);
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window.available_fonts = fonts;
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axes_info = Object.fromEntries(Object.entries(axes_info).map(([k,v]) => [k.toLowerCase(), v]));
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async function use_font() {
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const name = select.value;
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console.log(name);
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const info = await fetch_json(font_info_url(name));
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const variable_info = info.variable ? await fetch_json(variable_info_url(info.id)) : {};
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console.log(info);
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const preview = document.querySelector(`[data-font="${name}"]`);
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if(preview) {
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preview.scrollIntoView({block: 'center'});
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document.body.scrollTop = 0;
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}
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document.body.style.setProperty('--family',info.family);
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@ -153,7 +206,6 @@ async function go() {
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if(info.variable) {
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const variable_axes = document.getElementById('variable-axes');
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variable_axes.innerHTML = '';
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console.log(variable_info);
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const ranges = {};
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@ -208,7 +260,6 @@ async function go() {
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document.body.style['font-variation-settings'] = settings;
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}
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update_variables();
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}
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const css_declarations = [];
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@ -240,7 +291,7 @@ async function go() {
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}
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fonts = fonts.filter(f=>!f.id.includes('noto'));
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fonts = fonts.filter(f=>!f.id.match(/noto|playwrite/i));
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select.innerHTML = '';
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for(let font of fonts) {
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const option = document.createElement('option');
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@ -260,6 +311,27 @@ async function go() {
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document.getElementById('random-font').addEventListener('click', random_font);
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random_font();
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const fl = document.getElementById('font-list');
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const step = 10;
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for(let i=0;i<fonts.length;i+=step) {
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await Promise.all(fonts.slice(i+0,i+step).map(async f => {
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const li = document.createElement('li');
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fl.append(li);
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const a = document.createElement('a');
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li.append(a);
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a.addEventListener('click', () => {
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select.value = f.id;
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use_font();
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})
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const img = document.createElement('img');
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img.dataset.font = f.id;
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a.append(img);
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img.src = await draw_font_preview(f);
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img.style.height = '1em';
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img.alt = f.family;
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}));
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}
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}
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go();
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69
style.css
69
style.css
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@ -2,10 +2,59 @@
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--spacing: 1em;
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--family: sans-serif;
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--background: white;
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--color: black;
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color-scheme: light dark;
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height: 100svh;
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overflow: hidden;
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}
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@media (prefers-color-scheme: dark) {
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body {
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--background: black;
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--color: white;
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}
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#font-list img {
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filter: invert(100%);
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}
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}
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body {
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display: grid;
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grid-template-columns: 15em 1fr;
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gap: var(--spacing);
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width: 100svw;
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height: 100svh;
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margin: 0;
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overflow: hidden;
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color: var(--color);
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background: var(--background);
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}
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nav {
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height: 100svh;
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display: flex;
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flex-direction: column;
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}
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#controls {
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position: sticky;
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top: 0;
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background: var(--background);
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padding: var(--spacing);
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& select {
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width: 100%;
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}
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}
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main {
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font-family: var(--family);
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overflow: auto;
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}
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.fixed-font {
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@ -30,3 +79,23 @@ dt {
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max-height: 3em;
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overflow: auto;
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}
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#font-list {
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margin: 0;
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overflow: auto;
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width:100%;
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height:100%;
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font-size: 2rem;
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padding: 0;
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list-style: none;
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& li {
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overflow: hidden;
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}
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}
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#css-display {
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margin: 0;
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}
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