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import useMemo from 'rc-util/lib/hooks/useMemo';
import isEqual from 'rc-util/lib/isEqual';
import { devUseWarning } from '../../_util/warning';
import type { OverrideToken } from '../../theme/interface';
import { defaultConfig } from '../../theme/internal';
import type { ThemeConfig } from '../context';
import useThemeKey from './useThemeKey';
export default function useTheme(
theme?: ThemeConfig,
parentTheme?: ThemeConfig,
config?: {
prefixCls?: string;
},
): ThemeConfig | undefined {
const warning = devUseWarning('ConfigProvider');
const themeConfig = theme || {};
const parentThemeConfig: ThemeConfig =
themeConfig.inherit === false || !parentTheme
? {
...defaultConfig,
hashed: parentTheme?.hashed ?? defaultConfig.hashed,
cssVar: parentTheme?.cssVar,
}
: parentTheme;
const themeKey = useThemeKey();
if (process.env.NODE_ENV !== 'production') {
const cssVarEnabled = themeConfig.cssVar || parentThemeConfig.cssVar;
const validKey = !!(
(typeof themeConfig.cssVar === 'object' && themeConfig.cssVar?.key) ||
themeKey
);
warning(
!cssVarEnabled || validKey,
'breaking',
'Missing key in `cssVar` config. Please upgrade to React 18 or set `cssVar.key` manually in each ConfigProvider inside `cssVar` enabled ConfigProvider.',
);
}
return useMemo<ThemeConfig | undefined>(
() => {
if (!theme) {
return parentTheme;
}
// Override
const mergedComponents = {
...parentThemeConfig.components,
};
(Object.keys(theme.components || {}) as (keyof OverrideToken)[]).forEach((componentName) => {
mergedComponents[componentName] = {
...mergedComponents[componentName],
...theme.components![componentName],
} as any;
});
const cssVarKey = `css-var-${themeKey.replace(/:/g, '')}`;
const mergedCssVar = (themeConfig.cssVar ?? parentThemeConfig.cssVar) && {
prefix: config?.prefixCls, // Same as prefixCls by default
...(typeof parentThemeConfig.cssVar === 'object' ? parentThemeConfig.cssVar : {}),
...(typeof themeConfig.cssVar === 'object' ? themeConfig.cssVar : {}),
key: (typeof themeConfig.cssVar === 'object' && themeConfig.cssVar?.key) || cssVarKey,
};
// Base token
return {
...parentThemeConfig,
...themeConfig,
token: {
...parentThemeConfig.token,
...themeConfig.token,
},
components: mergedComponents,
cssVar: mergedCssVar,
};
},
[themeConfig, parentThemeConfig],
(prev, next) =>
prev.some((prevTheme, index) => {
const nextTheme = next[index];
return !isEqual(prevTheme, nextTheme, true);
}),
);
}
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