Andreas Reinhold / reiniandClaude Opus 5
bcf0d4f4e3
An app installed as a PWA, and a mobile browser, colour their bar from <meta name="theme-color">, which the package left alone: the bar kept the server's one colour whatever theme the visitor chose. With the new `theme.meta` option (off by default), <x-theme-script> sets the content of every theme-color meta without a `media` attribute to the resolved theme's surface, from the scheme data and for the profile in <html data-scheme>, adding one to <head> when the page has none. A MutationObserver on <html> follows every later change of data-theme or data-scheme: $store.theme's set() and toggle(), an OS change while `system`, a profile preview, an application's own script. wire:navigate's head merge puts the next page's server-rendered meta in place, so it is painted again as the page is swapped in and on livewire:navigated. Turned off, the script is byte-for-byte what it was. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01RHoXZSHc8gGpZjFmA5fPc2
172 lines
7.8 KiB
PHP
172 lines
7.8 KiB
PHP
{{-- The theme and the navigation rail's width, decided before the first paint. Include it in
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<head>, ahead of @vite.
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It reads the visitor's choice from localStorage (`livewire-material.theme.storage_key`):
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`light`, `dark` or `system`, falling back to `theme.default`. `system` follows the
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operating system, now and whenever it changes. The result is written to
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<html data-theme>, which is the only thing the stylesheet keys on; the choice itself is
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<html data-theme-choice>, where `$store.theme` picks it up.
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A value under one of `theme.legacy_keys` — an earlier toggle's key, which may be
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JSON-encoded (maryUI's `"dark"`) — is adopted once and removed. Nothing is written for a
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visitor who never chose, so changing `theme.default` later reaches them too.
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With colour profiles (`livewire-material.profiles`, generated by `material:scheme`), the
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active one — `Scheme::profile()`, which asks the application's resolver — is written to
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<html data-scheme>, which the generated stylesheet keys each profile on.
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The rail rides along for the theme's reason: <html data-rail> is `expanded` or `collapsed`
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(`livewire-material.rail.storage_key`, falling back to `rail.default`), and a collapsible
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rail's width is CSS keyed on it (the `rail-collapsed:` variant). Set any later, a collapsed
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rail would paint wide and snap shut on every load. `$store.rail` (resources/js/navigation.js)
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changes it.
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With `theme.meta` on, the browser's own chrome follows too: the `content` of every
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<meta name="theme-color"> without a `media` attribute — one is added to <head> when there is
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none — is the resolved theme's `surface`, from the scheme file (`Scheme`), for the profile in
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<html data-scheme> (else the active one). A MutationObserver on <html> keeps it in step with
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whatever changes `data-theme` or `data-scheme` afterwards: `$store.theme.set()` and `toggle()`,
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an OS change while `system`, a profile preview, the application's own script. A layout's own
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theme-color meta belongs before this script: one written after it is only painted on
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DOMContentLoaded, beside the one added here. Off by default, and then none of it is emitted.
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wire:navigate swaps the body, merges the head without running this again, and gives <html>
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the next page's attributes — which the server rendered without any of these, so Livewire
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removes them. They are put back as the new page is swapped in (`onSwap`, in the same task,
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before anything paints), so this only has to run on a full load. The head merge also puts the
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next page's server-rendered theme-color meta in place of the painted one, so it is painted
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again there, and once more on `livewire:navigated`. --}}
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@php
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$theme = config('livewire-material.theme');
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$rail = config('livewire-material.rail');
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$settings = [
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'scheme' => \NoNameWeb\LivewireMaterial\Support\Scheme::profile(),
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'default' => in_array($theme['default'] ?? null, ['light', 'dark', 'system'], true) ? $theme['default'] : 'system',
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'key' => $theme['storage_key'] ?? 'material-theme',
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'legacy' => array_values($theme['legacy_keys'] ?? []),
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'rail' => [
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'default' => ($rail['default'] ?? null) === 'collapsed' ? 'collapsed' : 'expanded',
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'key' => $rail['storage_key'] ?? 'material-rail',
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],
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];
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// Only the surfaces the meta can show: the active scheme's, and every profile's for a preview.
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if ((bool) ($theme['meta'] ?? false)) {
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$surfaces = fn (array $scheme): array => ['light' => $scheme['light']['surface'], 'dark' => $scheme['dark']['surface']];
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$schemeProfiles = \NoNameWeb\LivewireMaterial\Support\Scheme::profiles();
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$settings['meta'] = [
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...$surfaces($schemeProfiles[$settings['scheme']] ?? \NoNameWeb\LivewireMaterial\Support\Scheme::load()),
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'profiles' => (object) collect($schemeProfiles)->map($surfaces)->all(),
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];
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}
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@endphp
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<script>
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(function (settings) {
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var root = document.documentElement;
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var media = window.matchMedia('(prefers-color-scheme: dark)');
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var valid = function (value) { return value === 'light' || value === 'dark' || value === 'system'; };
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var choice = settings.default;
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var rail = settings.rail.default;
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try {
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var storedRail = localStorage.getItem(settings.rail.key);
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if (storedRail === 'collapsed' || storedRail === 'expanded') {
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rail = storedRail;
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}
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var stored = localStorage.getItem(settings.key);
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if (valid(stored)) {
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choice = stored;
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} else {
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settings.legacy.forEach(function (key) {
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var legacy = (localStorage.getItem(key) || '').replace(/"/g, '');
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if (valid(legacy)) {
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choice = legacy;
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localStorage.setItem(settings.key, legacy);
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}
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localStorage.removeItem(key);
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});
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}
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} catch (e) {
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// Private windows and blocked site data throw on access; the default stands.
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}
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var apply = function () {
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var current = root.getAttribute('data-theme-choice');
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root.setAttribute('data-theme', current === 'system' ? (media.matches ? 'dark' : 'light') : current);
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};
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if (settings.scheme) {
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root.setAttribute('data-scheme', settings.scheme);
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}
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root.setAttribute('data-theme-key', settings.key);
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root.setAttribute('data-theme-choice', choice);
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root.setAttribute('data-rail-key', settings.rail.key);
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root.setAttribute('data-rail', rail);
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apply();
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media.addEventListener('change', apply);
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@if (isset($settings['meta']))
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var paintThemeColor = function () {
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var theme = root.getAttribute('data-theme');
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var scheme = root.getAttribute('data-scheme');
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if ((theme !== 'light' && theme !== 'dark') || !document.head) {
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return;
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}
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var colour = (Object.prototype.hasOwnProperty.call(settings.meta.profiles, scheme) ? settings.meta.profiles[scheme] : settings.meta)[theme];
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var metas = document.head.querySelectorAll('meta[name="theme-color"]:not([media])');
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if (metas.length === 0) {
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var meta = document.createElement('meta');
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meta.setAttribute('name', 'theme-color');
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document.head.appendChild(meta);
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metas = [meta];
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}
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Array.prototype.forEach.call(metas, function (meta) {
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if (meta.getAttribute('content') !== colour) {
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meta.setAttribute('content', colour);
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}
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});
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};
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paintThemeColor();
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new MutationObserver(paintThemeColor).observe(root, { attributes: true, attributeFilter: ['data-theme', 'data-scheme'] });
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document.addEventListener('DOMContentLoaded', paintThemeColor);
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document.addEventListener('livewire:navigated', paintThemeColor);
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@endif
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document.addEventListener('livewire:navigating', function (event) {
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var kept = ['data-scheme', 'data-theme', 'data-theme-choice', 'data-theme-key', 'data-rail', 'data-rail-key'].map(function (name) {
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return [name, root.getAttribute(name)];
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});
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event.detail.onSwap(function () {
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kept.forEach(function (attribute) {
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if (attribute[1] !== null) {
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root.setAttribute(attribute[0], attribute[1]);
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}
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});
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@if (isset($settings['meta']))
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paintThemeColor();
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@endif
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});
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});
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})(@json($settings));
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</script>
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