Martin Dvorak
ff58fdd71d
The scene is the user's own Frutiger Aero image now: green hills, a river, an eco-city, bubbles and daisies. Re-encoded to public/aero/background.webp (152 kB) with a fresh 3 kB pre-blurred variant for the glass, and the WallpaperSafari credit line, its i18n keys and the README credit are gone (the image is made by the user with Gemini). Contrast: 0 below-minimum findings and 0 axe violations, all three themes. Version 0.2.8, SW -> freezmo-v60.
92 lines
2.6 KiB
TypeScript
92 lines
2.6 KiB
TypeScript
"use client";
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import { useSyncExternalStore } from "react";
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/**
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* The theme, as a shared store. It used to be component state inside
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* `useTheme()`, which meant every caller (header, rail, chat, Settings) had
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* its own copy: switching to Aero in Settings left the rail's light/dark row
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* on screen until a reload. One store, one snapshot, everyone re-renders.
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*/
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const STORAGE_KEY = "freezmo.theme";
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const THEME_COLORS = { light: "#f4f7fd", dark: "#0e1424", aero: "#2fa7e6" } as const;
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/** The three themes. Aero is not a dark/light variant: it replaces the palette
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* and the scene, and the light/dark toggles hide while it is on. */
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export type Theme = "light" | "dark" | "aero";
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let cached: Theme | null = null;
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const listeners = new Set<() => void>();
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function read(): Theme {
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try {
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const stored = window.localStorage.getItem(STORAGE_KEY);
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if (stored === "light" || stored === "dark" || stored === "aero") return stored;
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return window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light";
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} catch {
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/* private mode */
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return "light";
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}
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}
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function snapshot(): Theme {
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cached ??= read();
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return cached;
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}
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function serverSnapshot(): Theme {
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return "light";
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}
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/**
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* Keeps the first `theme-color` meta (the one the app owns) in step with the
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* in-app theme. The SSR metas follow the OS preference; this one always wins
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* because it is media-less and first in the head.
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*/
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export function syncThemeColor(theme: Theme) {
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try {
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let meta = document.querySelector<HTMLMetaElement>('meta[name="theme-color"][data-app]');
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if (!meta) {
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meta = document.createElement("meta");
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meta.setAttribute("name", "theme-color");
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meta.setAttribute("data-app", "1");
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document.head.insertBefore(meta, document.head.firstChild);
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}
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meta.setAttribute("content", THEME_COLORS[theme]);
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} catch {
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/* private mode / odd embedded browsers */
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}
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}
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export function applyTheme(next: Theme) {
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document.documentElement.classList.toggle("dark", next === "dark");
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document.documentElement.classList.toggle("aero", next === "aero");
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syncThemeColor(next);
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cached = next;
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try {
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window.localStorage.setItem(STORAGE_KEY, next);
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} catch {
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/* private mode */
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}
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listeners.forEach((listener) => listener());
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}
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export function useTheme() {
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const theme = useSyncExternalStore(
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(listener) => {
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listeners.add(listener);
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return () => listeners.delete(listener);
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},
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snapshot,
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serverSnapshot,
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);
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return {
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theme,
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setTheme: applyTheme,
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/** The light/dark flip; aero is chosen in Settings. */
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toggle: () => applyTheme(theme === "dark" ? "light" : "dark"),
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};
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}
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