120 lines
2.7 KiB
TypeScript
120 lines
2.7 KiB
TypeScript
import { createContext, useContext, useEffect, useState } from "react";
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type Theme = "dark" | "light" | "system";
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type ThemeProviderProps = {
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children: React.ReactNode;
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defaultTheme?: Theme;
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storageKey?: string;
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};
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type ThemeProviderState = {
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theme: Theme;
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setTheme: (theme: Theme) => void;
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};
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const initialState: ThemeProviderState = {
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theme: "system",
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setTheme: () => null,
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};
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const ThemeProviderContext = createContext<ThemeProviderState>(initialState);
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const isLocalStorageAvailable = () => {
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return (
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typeof window !== "undefined" &&
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typeof window.localStorage !== "undefined" &&
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window.localStorage !== null
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);
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};
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const HEADER_COLORS = {
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light: "#ffffff",
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dark: "#0d0d0d",
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};
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export function ThemeProvider({
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children,
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defaultTheme = "system",
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storageKey = "vite-ui-theme",
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...props
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}: ThemeProviderProps) {
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const [theme, setTheme] = useState<Theme>(() => {
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if (isLocalStorageAvailable()) {
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const storedTheme = localStorage.getItem(storageKey) as Theme;
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return storedTheme || defaultTheme;
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}
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return defaultTheme;
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});
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useEffect(() => {
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const root = window.document.documentElement;
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root.classList.remove("light", "dark");
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if (theme === "system") {
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const systemTheme = window.matchMedia("(prefers-color-scheme: dark)")
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.matches
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? "dark"
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: "light";
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document
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.querySelector("meta[name=theme-color]")
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?.setAttribute(
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"content",
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HEADER_COLORS[systemTheme] || HEADER_COLORS.light
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);
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root.classList.add(systemTheme);
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return;
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}
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document
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.querySelector("meta[name=theme-color]")
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?.setAttribute("content", HEADER_COLORS[theme] || HEADER_COLORS.light);
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root.classList.add(theme);
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}, [theme]);
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const value = {
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theme,
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setTheme: (theme: Theme) => {
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localStorage.setItem(storageKey, theme);
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setTheme(theme);
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},
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};
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return (
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<ThemeProviderContext.Provider {...props} value={value}>
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{children}
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</ThemeProviderContext.Provider>
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);
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}
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export const useTheme = () => {
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const context = useContext(ThemeProviderContext);
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if (context === undefined)
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throw new Error("useTheme must be used within a ThemeProvider");
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return context;
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};
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const isWindowAvailable = () => {
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return typeof window !== "undefined" && window !== null;
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};
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export const useDisplayedTheme = () => {
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const { theme, setTheme } = useTheme();
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if (theme === "system") {
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return {
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theme:
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isWindowAvailable() &&
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window.matchMedia("(prefers-color-scheme: dark)").matches
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? "dark"
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: "light",
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setTheme,
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};
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}
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return { theme, setTheme };
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};
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