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preview.js
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preview.js
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import React, { useState, useEffect } from 'react';
import Root from 'react-shadow';
import { StyleSheetManager } from 'styled-components';
import { hpe } from 'grommet-theme-hpe';
import isChromatic from 'chromatic/isChromatic';
import { Grommet, grommet, hacktoberfest2022, Box, Text } from '../src/js';
const CUSTOM_THEMED = 'Custom Themed';
const THEMES = {
hpe,
grommet,
hacktoberfest2022,
base: {},
};
export const decorators = [
(Story, context) => {
const [rootRef, setRootRef] = useState(null);
const [state, setState] = useState('grommet');
const [root, setRoot] = useState('document');
const full = context.allArgs?.full || 'min';
const dir = context.allArgs?.dir;
const options = context.allArgs?.options;
useEffect(() => {
setState(context.globals.theme);
}, [context.globals.theme]);
useEffect(() => {
setRoot(context.globals.root);
}, [context.globals.root]);
/**
* This demonstrates that custom themed stories are driven off the "base"
* theme. Custom themed stories will live under a "CustomThemed" directory.
*/
if (context.kind.split('/')[2] === CUSTOM_THEMED && state !== 'base') {
// if we are running the story in chromatic we want the chromatic snapshot
// to be taken in the base theme for custom theme stories
if (isChromatic()) {
return (
<Grommet theme={THEMES.base}>
<Story state={THEMES.base} />
</Grommet>
);
}
return (
<Box align="center" pad="large">
<Text size="large">
{`Custom themed stories are only displayed in the
"base" theme mode. To enable, select "base" from the
Theme menu above.`}
</Text>
<div hidden>
<Story state={THEMES[state]} />
</div>
</Box>
);
}
if (root === 'shadow') {
return (
// eslint-disable-next-line react/jsx-pascal-case
<Root.div ref={setRootRef}>
{rootRef && (
<StyleSheetManager target={rootRef.shadowRoot}>
<Grommet
theme={THEMES[state]}
full={full}
dir={dir}
options={options}
containerTarget={rootRef.shadowRoot}
>
<Story state={THEMES[state]} />
</Grommet>
</StyleSheetManager>
)}
</Root.div>
);
}
return (
<Grommet theme={THEMES[state]} full={full} dir={dir} options={options}>
<Story state={THEMES[state]} />
</Grommet>
);
},
];
export const parameters = {
layout: 'fullscreen',
options: {
storySort: (first, second) => {
/**
* The story sort algorithm will only ever compare two stories
* a single time. This means that every story will only ever be either
* the "first" parameter OR the "second" parameter, but not both.
* So, the checks for custom themed stories need to happen on both inputs
* of this function.
*
* A return value of 1 results in sorting the "first" story AFTER the
* "second" story.
*
* A return value of 0 results in sorting the "first" story BEFORE the
* secondary story.
*/
const isFirstCustom = first[1].kind.split('/')[2] === CUSTOM_THEMED;
const isSecondCustom = second[1].kind.split('/')[2] === CUSTOM_THEMED;
if (isFirstCustom) return 1;
if (isSecondCustom) return 0;
return first[1].kind === second[1].kind
? 0
: first[1].id.localeCompare(second[1].id, undefined, { numeric: true });
},
},
};
export const globalTypes = {
theme: {
defaultValue: 'grommet',
toolbar: {
title: 'Theme',
items: [
{ title: 'base', value: 'base' },
{ title: 'grommet', value: 'grommet' },
{ title: 'hpe', value: 'hpe' },
{ title: 'hacktoberfest2022', value: 'hacktoberfest2022' },
],
},
},
root: {
defaultValue: 'document',
toolbar: {
title: 'Root',
items: ['document', 'shadow'],
},
},
};