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Add theme picker to demo page with presets and copy CSS #115

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3 changes: 3 additions & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
@@ -1 +1,4 @@
dist
docs/public
docs/static/oat.min.css
docs/static/oat.min.js
88 changes: 88 additions & 0 deletions docs/static/demo.css
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Expand Up @@ -37,4 +37,92 @@ body.demo {
padding-bottom: 0;
}
}
}

.theme-toolbar {
position: sticky;
top: 0;
z-index: 100;
background: var(--background);
border-bottom: 1px solid var(--border);
padding: var(--space-3) var(--space-4);
margin: calc(-1 * var(--space-8)) calc(-1 * var(--container-pad)) var(--space-6);
}

.theme-toolbar-row {
display: flex;
align-items: center;
justify-content: space-between;
flex-wrap: wrap;
gap: var(--space-2);
}

.theme-toolbar-label {
font-size: var(--text-7);
font-weight: var(--font-semibold);
color: var(--muted-foreground);
margin-right: var(--space-1);
}

.theme-toolbar input[type="color"] {
width: 28px;
height: 28px;
padding: 0;
border: 2px solid var(--border);
border-radius: var(--radius-full);
cursor: pointer;
background: transparent;
-webkit-appearance: none;
appearance: none;
overflow: hidden;
align-self: center;
}

.theme-presets-inline,
.theme-presets-dropdown {
display: flex;
align-items: center;
}

.theme-toolbar input[type="color"]::-webkit-color-swatch-wrapper {
padding: 0;
}

.theme-toolbar input[type="color"]::-webkit-color-swatch {
border: none;
border-radius: var(--radius-full);
}

.theme-toolbar input[type="color"]::-moz-color-swatch {
border: none;
border-radius: var(--radius-full);
}

.theme-preset-btn {
gap: var(--space-1);
font-size: var(--text-8);
opacity: 0.5;
transition: opacity var(--transition-fast);
}

.theme-preset-btn:hover {
opacity: 0.8;
}

.theme-preset-btn.active {
opacity: 1;
}



@media (max-width: 600px) {
.theme-presets-inline {
display: none;
}
}

@media (min-width: 601px) {
.theme-presets-dropdown {
display: none;
}
}
240 changes: 239 additions & 1 deletion docs/templates/demo.html
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Expand Up @@ -5,6 +5,55 @@
{% block content %}
<link href="/demo.css" rel="stylesheet" />

<div class="theme-toolbar" id="theme-toolbar">
<div class="theme-toolbar-row">
<div class="hstack">
<span class="theme-toolbar-label">Theme</span>
<input type="color" id="theme-accent" value="#574747" title="Pick accent color">
<span class="theme-presets-inline">
<button class="ghost small theme-preset-btn active" data-preset="default">Default</button>
<button class="ghost small theme-preset-btn" data-preset="#574747">Brown</button>
<button class="ghost small theme-preset-btn" data-preset="#1463b4">Ocean</button>
<button class="ghost small theme-preset-btn" data-preset="#1b6b3d">Forest</button>
<button class="ghost small theme-preset-btn" data-preset="#ad2a67">Rose</button>
<button class="ghost small theme-preset-btn" data-preset="#6366f1">Indigo</button>
<button class="ghost small theme-preset-btn" data-preset="#ea580c">Orange</button>
</span>
<ot-dropdown class="theme-presets-dropdown">
<button popovertarget="theme-preset-menu" class="outline small" id="theme-preset-dropdown-label">Default ▾</button>
<menu popover id="theme-preset-menu">
<button role="menuitem" data-preset="default">Default</button>
<button role="menuitem" data-preset="#574747">Brown</button>
<button role="menuitem" data-preset="#1463b4">Ocean</button>
<button role="menuitem" data-preset="#1b6b3d">Forest</button>
<button role="menuitem" data-preset="#ad2a67">Rose</button>
<button role="menuitem" data-preset="#6366f1">Indigo</button>
<button role="menuitem" data-preset="#ea580c">Orange</button>
</menu>
</ot-dropdown>
</div>
<div class="hstack">
<button class="outline small" id="theme-copy" commandfor="theme-css-dialog" command="show-modal">Copy CSS</button>
</div>
</div>
</div>

<dialog id="theme-css-dialog" closedby="any">
<form method="dialog">
<header>
<h3>Theme CSS</h3>
<p>Paste this after <code>oat.min.css</code> in your project.</p>
</header>
<div>
<textarea id="theme-css-output" readonly rows="16"></textarea>
</div>
<footer>
<button type="button" id="theme-css-clipboard" class="small">Copy to clipboard</button>
<button type="button" class="outline small" commandfor="theme-css-dialog" command="close">Close</button>
</footer>
</form>
</dialog>

<section class="section">
<div class="hstack justify-between mb-6">
<div class="hstack">
Expand Down Expand Up @@ -601,5 +650,194 @@ <h5>Loading placeholder</h5>
</div>
</section>


<script>
(function() {
const accentInput = document.getElementById('theme-accent');
const cssOutput = document.getElementById('theme-css-output');
const cssDialog = document.getElementById('theme-css-dialog');
const clipboardBtn = document.getElementById('theme-css-clipboard');
const presetBtns = document.querySelectorAll('[data-preset]');
const dropdownLabel = document.getElementById('theme-preset-dropdown-label');
const presetMenu = document.getElementById('theme-preset-menu');
const root = document.documentElement;

function hexToHSL(hex) {
let r = parseInt(hex.slice(1, 3), 16) / 255;
let g = parseInt(hex.slice(3, 5), 16) / 255;
let b = parseInt(hex.slice(5, 7), 16) / 255;
const max = Math.max(r, g, b), min = Math.min(r, g, b);
let h, s, l = (max + min) / 2;
if (max === min) { h = s = 0; }
else {
const d = max - min;
s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
switch (max) {
case r: h = ((g - b) / d + (g < b ? 6 : 0)) / 6; break;
case g: h = ((b - r) / d + 2) / 6; break;
case b: h = ((r - g) / d + 4) / 6; break;
}
}
return [Math.round(h * 360), Math.round(s * 100), Math.round(l * 100)];
}

function hslToHex(h, s, l) {
s /= 100; l /= 100;
const a = s * Math.min(l, 1 - l);
const f = n => {
const k = (n + h / 30) % 12;
const color = l - a * Math.max(Math.min(k - 3, 9 - k, 1), -1);
return Math.round(255 * color).toString(16).padStart(2, '0');
};
return '#' + f(0) + f(8) + f(4);
}

function clamp(v, min, max) { return Math.min(max, Math.max(min, v)); }

function deriveTheme(accent) {
const [h, s, l] = hexToHSL(accent);
const light = {
'background': '#ffffff',
'foreground': hslToHex(h, clamp(s - 30, 5, 15), 5),
'card': '#ffffff',
'card-foreground': hslToHex(h, clamp(s - 30, 5, 15), 5),
'primary': accent,
'primary-foreground': l > 55 ? hslToHex(h, clamp(s, 10, 30), 10) : '#fafafa',
'secondary': hslToHex(h, clamp(s - 20, 5, 20), 95),
'secondary-foreground': accent,
'muted': hslToHex(h, clamp(s - 20, 5, 20), 95),
'muted-foreground': hslToHex(h, clamp(s - 15, 5, 15), 45),
'faint': hslToHex(h, clamp(s - 25, 3, 12), 98),
'faint-foreground': hslToHex(h, clamp(s - 20, 5, 15), 65),
'accent': hslToHex(h, clamp(s - 20, 5, 20), 95),
'danger': '#d32f2f',
'danger-foreground': '#fafafa',
'success': '#008032',
'success-foreground': '#fafafa',
'warning': '#a65b00',
'warning-foreground': '#09090b',
'border': hslToHex(h, clamp(s - 15, 5, 20), 83),
'input': hslToHex(h, clamp(s - 15, 5, 20), 83),
'ring': accent
};

const dark = {
'background': hslToHex(h, clamp(s - 20, 5, 15), 4),
'foreground': hslToHex(h, clamp(s - 25, 5, 15), 96),
'card': hslToHex(h, clamp(s - 15, 5, 15), 9),
'card-foreground': hslToHex(h, clamp(s - 25, 5, 15), 96),
'primary': hslToHex(h, clamp(s + 10, 40, 80), 75),
'primary-foreground': hslToHex(h, clamp(s, 10, 30), 10),
'secondary': hslToHex(h, clamp(s - 10, 5, 20), 16),
'secondary-foreground': hslToHex(h, clamp(s - 25, 5, 15), 96),
'muted': hslToHex(h, clamp(s - 10, 5, 20), 16),
'muted-foreground': hslToHex(h, clamp(s - 10, 5, 25), 65),
'faint': hslToHex(h, clamp(s - 15, 5, 15), 12),
'faint-foreground': hslToHex(h, clamp(s - 15, 5, 20), 48),
'accent': hslToHex(h, clamp(s - 5, 5, 20), 20),
'danger': '#f4807b',
'danger-foreground': '#18181b',
'success': '#6cc070',
'success-foreground': '#18181b',
'warning': '#f0a030',
'warning-foreground': '#09090b',
'border': hslToHex(h, clamp(s - 5, 5, 20), 32),
'input': hslToHex(h, clamp(s - 5, 5, 20), 32),
'ring': hslToHex(h, clamp(s + 10, 40, 80), 75)
};

return { light, dark };
}

const TOKEN_ORDER = [
'background', 'foreground', 'card', 'card-foreground',
'primary', 'primary-foreground', 'secondary', 'secondary-foreground',
'muted', 'muted-foreground', 'faint', 'faint-foreground', 'accent',
'danger', 'danger-foreground', 'success', 'success-foreground',
'warning', 'warning-foreground', 'border', 'input', 'ring'
];

function resetTheme() {
for (const t of TOKEN_ORDER) root.style.removeProperty('--' + t);
}

function applyTheme(accent) {
const theme = deriveTheme(accent);
const isDark = root.getAttribute('data-theme') === 'dark' ||
(!root.getAttribute('data-theme') && matchMedia('(prefers-color-scheme: dark)').matches);
const mode = isDark ? 'dark' : 'light';
const tokens = theme[mode];

for (const [key, val] of Object.entries(tokens)) {
root.style.setProperty('--' + key, val);
}

cssOutput.value = makeCss(theme);
}

function makeCss(theme) {
const lines = [':root {'];
for (const t of TOKEN_ORDER) lines.push(' --' + t + ': ' + theme.light[t] + ';');
lines.push('}', '', '[data-theme="dark"] {');
for (const t of TOKEN_ORDER) lines.push(' --' + t + ': ' + theme.dark[t] + ';');
lines.push('}');
return lines.join('\n');
}

function setActivePreset(color) {
let activeName = 'Custom';
presetBtns.forEach(btn => {
const isActive = btn.getAttribute('data-preset') === color;
btn.classList.toggle('active', isActive);
btn.setAttribute('aria-pressed', String(isActive));
if (isActive) activeName = btn.textContent.trim();
});
dropdownLabel.textContent = activeName + ' \u25be';
}

accentInput.addEventListener('input', () => {
setActivePreset(null);
applyTheme(accentInput.value);
});

presetBtns.forEach(btn => {
btn.addEventListener('click', () => {
const preset = btn.getAttribute('data-preset');
if (preset === 'default') {
resetTheme();
setActivePreset('default');
} else {
accentInput.value = preset;
setActivePreset(preset);
applyTheme(preset);
}
if (presetMenu.matches(':popover-open')) presetMenu.hidePopover();
});
});

cssDialog.addEventListener('toggle', () => {
if (cssDialog.open) {
const active = document.querySelector('.theme-preset-btn.active');
const accent = active?.getAttribute('data-preset');
cssOutput.value = accent && accent !== 'default'
? makeCss(deriveTheme(accent))
: makeCss(deriveTheme('#574747'));
}
});

clipboardBtn.addEventListener('click', () => {
navigator.clipboard.writeText(cssOutput.value).then(() => {
clipboardBtn.textContent = 'Copied!';
setTimeout(() => { clipboardBtn.textContent = 'Copy to clipboard'; }, 1500);
});
});

const observer = new MutationObserver(() => {
const active = document.querySelector('.theme-preset-btn.active');
if (active?.getAttribute('data-preset') !== 'default') {
applyTheme(accentInput.value);
}
});
observer.observe(root, { attributes: true, attributeFilter: ['data-theme'] });
})();
</script>
{% endblock %}