1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
import React from 'react'
import {
computeFontScaleMultiplier,
getFontFamily,
getFontScale,
setFontFamily as persistFontFamily,
setFontScale as persistFontScale,
} from '#/alf/fonts'
import {createThemes, defaultTheme} from '#/alf/themes'
import {Theme, ThemeName} from '#/alf/types'
import {BLUE_HUE, GREEN_HUE, RED_HUE} from '#/alf/util/colorGeneration'
import {Device} from '#/storage'
export {atoms} from '#/alf/atoms'
export * from '#/alf/breakpoints'
export * from '#/alf/fonts'
export * as tokens from '#/alf/tokens'
export * from '#/alf/types'
export * from '#/alf/util/flatten'
export * from '#/alf/util/platform'
export * from '#/alf/util/themeSelector'
export * from '#/alf/util/useGutters'
export type Alf = {
themeName: ThemeName
theme: Theme
themes: ReturnType<typeof createThemes>
fonts: {
scale: Exclude<Device['fontScale'], undefined>
scaleMultiplier: number
family: Device['fontFamily']
setFontScale: (fontScale: Exclude<Device['fontScale'], undefined>) => void
setFontFamily: (fontFamily: Device['fontFamily']) => void
}
/**
* Feature flags or other gated options
*/
flags: {}
}
/*
* Context
*/
export const Context = React.createContext<Alf>({
themeName: 'light',
theme: defaultTheme,
themes: createThemes({
hues: {
primary: BLUE_HUE,
negative: RED_HUE,
positive: GREEN_HUE,
},
}),
fonts: {
scale: getFontScale(),
scaleMultiplier: computeFontScaleMultiplier(getFontScale()),
family: getFontFamily(),
setFontScale: () => {},
setFontFamily: () => {},
},
flags: {},
})
export function ThemeProvider({
children,
theme: themeName,
}: React.PropsWithChildren<{theme: ThemeName}>) {
const [fontScale, setFontScale] = React.useState<Alf['fonts']['scale']>(() =>
getFontScale(),
)
const [fontScaleMultiplier, setFontScaleMultiplier] = React.useState(() =>
computeFontScaleMultiplier(fontScale),
)
const setFontScaleAndPersist = React.useCallback<
Alf['fonts']['setFontScale']
>(
fontScale => {
setFontScale(fontScale)
persistFontScale(fontScale)
setFontScaleMultiplier(computeFontScaleMultiplier(fontScale))
},
[setFontScale],
)
const [fontFamily, setFontFamily] = React.useState<Alf['fonts']['family']>(
() => getFontFamily(),
)
const setFontFamilyAndPersist = React.useCallback<
Alf['fonts']['setFontFamily']
>(
fontFamily => {
setFontFamily(fontFamily)
persistFontFamily(fontFamily)
},
[setFontFamily],
)
const themes = React.useMemo(() => {
return createThemes({
hues: {
primary: BLUE_HUE,
negative: RED_HUE,
positive: GREEN_HUE,
},
})
}, [])
const value = React.useMemo<Alf>(
() => ({
themes,
themeName: themeName,
theme: themes[themeName],
fonts: {
scale: fontScale,
scaleMultiplier: fontScaleMultiplier,
family: fontFamily,
setFontScale: setFontScaleAndPersist,
setFontFamily: setFontFamilyAndPersist,
},
flags: {},
}),
[
themeName,
themes,
fontScale,
setFontScaleAndPersist,
fontFamily,
setFontFamilyAndPersist,
fontScaleMultiplier,
],
)
return <Context.Provider value={value}>{children}</Context.Provider>
}
export function useAlf() {
return React.useContext(Context)
}
export function useTheme(theme?: ThemeName) {
const alf = useAlf()
return React.useMemo(() => {
return theme ? alf.themes[theme] : alf.theme
}, [theme, alf])
}
|
