@primer/react
Version:
An implementation of GitHub's Primer Design System using React
222 lines (212 loc) • 8.64 kB
JavaScript
import { c } from 'react-compiler-runtime';
import React from 'react';
import ReactDOM from 'react-dom';
import theme from './theme.js';
import deepmerge from 'deepmerge';
import { useSyncedState } from './hooks/useSyncedState.js';
import { jsx, jsxs } from 'react/jsx-runtime';
import { useId } from './hooks/useId.js';
const defaultColorMode = 'day';
const defaultDayScheme = 'light';
const defaultNightScheme = 'dark';
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const ThemeContext = /*#__PURE__*/React.createContext({
setColorMode: () => null,
setDayScheme: () => null,
setNightScheme: () => null
});
// inspired from __NEXT_DATA__, we use application/json to avoid CSRF policy with inline scripts
const getServerHandoff = id => {
try {
var _document$getElementB;
const serverData = (_document$getElementB = document.getElementById(`__PRIMER_DATA_${id}__`)) === null || _document$getElementB === void 0 ? void 0 : _document$getElementB.textContent;
if (serverData) return JSON.parse(serverData);
} catch (_error) {
// if document/element does not exist or JSON is invalid, suppress error
}
return {};
};
const ThemeProvider = ({
children,
...props
}) => {
var _ref, _props$colorMode, _ref2, _props$dayScheme, _ref3, _props$nightScheme;
// Get fallback values from parent ThemeProvider (if exists)
const {
theme: fallbackTheme,
colorMode: fallbackColorMode,
dayScheme: fallbackDayScheme,
nightScheme: fallbackNightScheme
} = useTheme();
// Initialize state
const theme$1 = fallbackTheme !== null && fallbackTheme !== void 0 ? fallbackTheme : theme;
const uniqueDataId = useId();
const {
resolvedServerColorMode
} = getServerHandoff(uniqueDataId);
const resolvedColorModePassthrough = React.useRef(resolvedServerColorMode);
const [colorMode, setColorMode] = useSyncedState((_ref = (_props$colorMode = props.colorMode) !== null && _props$colorMode !== void 0 ? _props$colorMode : fallbackColorMode) !== null && _ref !== void 0 ? _ref : defaultColorMode);
const [dayScheme, setDayScheme] = useSyncedState((_ref2 = (_props$dayScheme = props.dayScheme) !== null && _props$dayScheme !== void 0 ? _props$dayScheme : fallbackDayScheme) !== null && _ref2 !== void 0 ? _ref2 : defaultDayScheme);
const [nightScheme, setNightScheme] = useSyncedState((_ref3 = (_props$nightScheme = props.nightScheme) !== null && _props$nightScheme !== void 0 ? _props$nightScheme : fallbackNightScheme) !== null && _ref3 !== void 0 ? _ref3 : defaultNightScheme);
const systemColorMode = useSystemColorMode();
// eslint-disable-next-line react-hooks/refs
const resolvedColorMode = resolvedColorModePassthrough.current || resolveColorMode(colorMode, systemColorMode);
const colorScheme = chooseColorScheme(resolvedColorMode, dayScheme, nightScheme);
const {
resolvedTheme,
resolvedColorScheme
} = React.useMemo(() => applyColorScheme(theme$1, colorScheme), [theme$1, colorScheme]);
// this effect will only run on client
React.useEffect(function updateColorModeAfterServerPassthrough() {
const resolvedColorModeOnClient = resolveColorMode(colorMode, systemColorMode);
if (resolvedColorModePassthrough.current) {
// if the resolved color mode passed on from the server is not the resolved color mode on client, change it!
if (resolvedColorModePassthrough.current !== resolvedColorModeOnClient) {
window.setTimeout(() => {
// use ReactDOM.flushSync to prevent automatic batching of state updates since React 18
// ref: https://github.com/reactwg/react-18/discussions/21
ReactDOM.flushSync(() => {
// override colorMode to whatever is resolved on the client to get a re-render
setColorMode(resolvedColorModeOnClient);
});
// immediately after that, set the colorMode to what the user passed to respond to system color mode changes
setColorMode(colorMode);
});
}
resolvedColorModePassthrough.current = null;
}
}, [colorMode, systemColorMode, setColorMode]);
return /*#__PURE__*/jsx(ThemeContext.Provider, {
value: {
theme: resolvedTheme,
colorScheme,
colorMode,
resolvedColorMode,
resolvedColorScheme,
dayScheme,
nightScheme,
setColorMode,
setDayScheme,
setNightScheme
},
children: /*#__PURE__*/jsxs("div", {
"data-color-mode": colorMode === 'auto' ? 'auto' : colorScheme.includes('dark') ? 'dark' : 'light',
"data-light-theme": dayScheme,
"data-dark-theme": nightScheme,
children: [children, props.preventSSRMismatch ? /*#__PURE__*/jsx("script", {
type: "application/json",
id: `__PRIMER_DATA_${uniqueDataId}__`,
dangerouslySetInnerHTML: {
__html: JSON.stringify({
resolvedServerColorMode: resolvedColorMode
})
}
}) : null]
})
});
};
ThemeProvider.displayName = "ThemeProvider";
function useTheme() {
return React.useContext(ThemeContext);
}
function useColorSchemeVar(values, fallback) {
var _values$colorScheme;
const {
colorScheme: t0
} = useTheme();
const colorScheme = t0 === undefined ? "" : t0;
return (_values$colorScheme = values[colorScheme]) !== null && _values$colorScheme !== void 0 ? _values$colorScheme : fallback;
}
function useSystemColorMode() {
const $ = c(2);
const [systemColorMode, setSystemColorMode] = React.useState(getSystemColorMode);
let t0;
let t1;
if ($[0] === Symbol.for("react.memo_cache_sentinel")) {
t0 = () => {
var _window, _window$matchMedia;
const media = (_window = window) === null || _window === void 0 ? void 0 : (_window$matchMedia = _window.matchMedia) === null || _window$matchMedia === void 0 ? void 0 : _window$matchMedia.call(_window, "(prefers-color-scheme: dark)");
const matchesMediaToColorMode = function matchesMediaToColorMode(matches) {
return matches ? "night" : "day";
};
const handleChange = function handleChange(event) {
const isNight = event.matches;
setSystemColorMode(matchesMediaToColorMode(isNight));
};
if (media) {
const isNight_0 = media.matches;
setSystemColorMode(matchesMediaToColorMode(isNight_0));
if (media.addEventListener !== undefined) {
media.addEventListener("change", handleChange);
return function cleanup() {
media.removeEventListener("change", handleChange);
};
} else {
if (media.addListener !== undefined) {
media.addListener(handleChange);
return function cleanup() {
media.removeListener(handleChange);
};
}
}
}
};
t1 = [];
$[0] = t0;
$[1] = t1;
} else {
t0 = $[0];
t1 = $[1];
}
React.useEffect(t0, t1);
return systemColorMode;
}
function getSystemColorMode() {
var _window$matchMedia2, _window2, _window$matchMedia2$c;
// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
if (typeof window !== 'undefined' && (_window$matchMedia2 = (_window2 = window).matchMedia) !== null && _window$matchMedia2 !== void 0 && (_window$matchMedia2$c = _window$matchMedia2.call(_window2, '(prefers-color-scheme: dark)')) !== null && _window$matchMedia2$c !== void 0 && _window$matchMedia2$c.matches) {
return 'night';
}
return 'day';
}
function resolveColorMode(colorMode, systemColorMode) {
switch (colorMode) {
case 'auto':
return systemColorMode;
default:
return colorMode;
}
}
function chooseColorScheme(colorMode, dayScheme, nightScheme) {
switch (colorMode) {
case 'day':
case 'light':
return dayScheme;
case 'dark':
case 'night':
return nightScheme;
}
}
function applyColorScheme(theme, colorScheme) {
if (!theme.colorSchemes) {
return {
resolvedTheme: theme,
resolvedColorScheme: undefined
};
}
if (!theme.colorSchemes[colorScheme]) {
// eslint-disable-next-line no-console
console.error(`\`${colorScheme}\` scheme not defined in \`theme.colorSchemes\``);
// Apply the first defined color scheme
const defaultColorScheme = Object.keys(theme.colorSchemes)[0];
return {
resolvedTheme: deepmerge(theme, theme.colorSchemes[defaultColorScheme]),
resolvedColorScheme: defaultColorScheme
};
}
return {
resolvedTheme: deepmerge(theme, theme.colorSchemes[colorScheme]),
resolvedColorScheme: colorScheme
};
}
export { ThemeProvider, ThemeProvider as default, defaultColorMode, useColorSchemeVar, useTheme };