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| 1 | +import color from 'color'; |
| 2 | + |
| 3 | +import type { ElevationColors, ThemeColors } from '../../../types'; |
| 4 | +import { tokens } from '../../index'; |
| 5 | + |
| 6 | +type Palette = typeof tokens.md.ref.palette; |
| 7 | +type PaletteKey = keyof Palette; |
| 8 | +type Ref = typeof tokens.md.ref; |
| 9 | + |
| 10 | +/** Roles that map 1:1 to a palette key. Excludes the computed fields. */ |
| 11 | +type MappedRoles = Omit<ThemeColors, 'stateLayerPressed' | 'elevation'>; |
| 12 | + |
| 13 | +type Contrast = 'standard'; // extend with 'medium' | 'high' when those ship |
| 14 | + |
| 15 | +const roleToTone: Record< |
| 16 | + 'light' | 'dark', |
| 17 | + Record<Contrast, Record<keyof MappedRoles, PaletteKey>> |
| 18 | +> = { |
| 19 | + light: { |
| 20 | + standard: { |
| 21 | + primary: 'primary40', |
| 22 | + onPrimary: 'primary100', |
| 23 | + primaryContainer: 'primary90', |
| 24 | + onPrimaryContainer: 'primary10', |
| 25 | + secondary: 'secondary40', |
| 26 | + onSecondary: 'secondary100', |
| 27 | + secondaryContainer: 'secondary90', |
| 28 | + onSecondaryContainer: 'secondary10', |
| 29 | + tertiary: 'tertiary40', |
| 30 | + onTertiary: 'tertiary100', |
| 31 | + tertiaryContainer: 'tertiary90', |
| 32 | + onTertiaryContainer: 'tertiary10', |
| 33 | + error: 'error40', |
| 34 | + onError: 'error100', |
| 35 | + errorContainer: 'error90', |
| 36 | + onErrorContainer: 'error10', |
| 37 | + surface: 'neutral98', |
| 38 | + surfaceDim: 'neutral87', |
| 39 | + surfaceBright: 'neutral98', |
| 40 | + surfaceContainerLowest: 'neutral100', |
| 41 | + surfaceContainerLow: 'neutral96', |
| 42 | + surfaceContainer: 'neutral94', |
| 43 | + surfaceContainerHigh: 'neutral92', |
| 44 | + surfaceContainerHighest: 'neutral90', |
| 45 | + surfaceVariant: 'neutralVariant90', |
| 46 | + background: 'neutral98', |
| 47 | + onSurface: 'neutral10', |
| 48 | + onSurfaceVariant: 'neutralVariant30', |
| 49 | + onBackground: 'neutral10', |
| 50 | + outline: 'neutralVariant50', |
| 51 | + outlineVariant: 'neutralVariant80', |
| 52 | + inverseSurface: 'neutral20', |
| 53 | + inverseOnSurface: 'neutral95', |
| 54 | + inversePrimary: 'primary80', |
| 55 | + primaryFixed: 'primary90', |
| 56 | + primaryFixedDim: 'primary80', |
| 57 | + onPrimaryFixed: 'primary10', |
| 58 | + onPrimaryFixedVariant: 'primary30', |
| 59 | + secondaryFixed: 'secondary90', |
| 60 | + secondaryFixedDim: 'secondary80', |
| 61 | + onSecondaryFixed: 'secondary10', |
| 62 | + onSecondaryFixedVariant: 'secondary30', |
| 63 | + tertiaryFixed: 'tertiary90', |
| 64 | + tertiaryFixedDim: 'tertiary80', |
| 65 | + onTertiaryFixed: 'tertiary10', |
| 66 | + onTertiaryFixedVariant: 'tertiary30', |
| 67 | + shadow: 'neutral0', |
| 68 | + scrim: 'neutral0', |
| 69 | + }, |
| 70 | + }, |
| 71 | + dark: { |
| 72 | + standard: { |
| 73 | + primary: 'primary80', |
| 74 | + onPrimary: 'primary20', |
| 75 | + primaryContainer: 'primary30', |
| 76 | + onPrimaryContainer: 'primary90', |
| 77 | + secondary: 'secondary80', |
| 78 | + onSecondary: 'secondary20', |
| 79 | + secondaryContainer: 'secondary30', |
| 80 | + onSecondaryContainer: 'secondary90', |
| 81 | + tertiary: 'tertiary80', |
| 82 | + onTertiary: 'tertiary20', |
| 83 | + tertiaryContainer: 'tertiary30', |
| 84 | + onTertiaryContainer: 'tertiary90', |
| 85 | + error: 'error80', |
| 86 | + onError: 'error20', |
| 87 | + errorContainer: 'error30', |
| 88 | + onErrorContainer: 'error80', |
| 89 | + surface: 'neutral6', |
| 90 | + surfaceDim: 'neutral6', |
| 91 | + surfaceBright: 'neutral24', |
| 92 | + surfaceContainerLowest: 'neutral4', |
| 93 | + surfaceContainerLow: 'neutral10', |
| 94 | + surfaceContainer: 'neutral12', |
| 95 | + surfaceContainerHigh: 'neutral17', |
| 96 | + surfaceContainerHighest: 'neutral22', |
| 97 | + surfaceVariant: 'neutralVariant30', |
| 98 | + background: 'neutral6', |
| 99 | + onSurface: 'neutral90', |
| 100 | + onSurfaceVariant: 'neutralVariant80', |
| 101 | + onBackground: 'neutral90', |
| 102 | + outline: 'neutralVariant60', |
| 103 | + outlineVariant: 'neutralVariant30', |
| 104 | + inverseSurface: 'neutral90', |
| 105 | + inverseOnSurface: 'neutral20', |
| 106 | + inversePrimary: 'primary40', |
| 107 | + primaryFixed: 'primary90', |
| 108 | + primaryFixedDim: 'primary80', |
| 109 | + onPrimaryFixed: 'primary10', |
| 110 | + onPrimaryFixedVariant: 'primary30', |
| 111 | + secondaryFixed: 'secondary90', |
| 112 | + secondaryFixedDim: 'secondary80', |
| 113 | + onSecondaryFixed: 'secondary10', |
| 114 | + onSecondaryFixedVariant: 'secondary30', |
| 115 | + tertiaryFixed: 'tertiary90', |
| 116 | + tertiaryFixedDim: 'tertiary80', |
| 117 | + onTertiaryFixed: 'tertiary10', |
| 118 | + onTertiaryFixedVariant: 'tertiary30', |
| 119 | + shadow: 'neutral0', |
| 120 | + scrim: 'neutral0', |
| 121 | + }, |
| 122 | + }, |
| 123 | +}; |
| 124 | + |
| 125 | +const elevationToTone: Record< |
| 126 | + 'light' | 'dark', |
| 127 | + Record<Contrast, Record<Exclude<keyof ElevationColors, 'level0'>, PaletteKey>> |
| 128 | +> = { |
| 129 | + light: { |
| 130 | + standard: { |
| 131 | + level1: 'neutral96', |
| 132 | + level2: 'neutral94', |
| 133 | + level3: 'neutral92', |
| 134 | + level4: 'neutral92', |
| 135 | + level5: 'neutral90', |
| 136 | + }, |
| 137 | + }, |
| 138 | + dark: { |
| 139 | + standard: { |
| 140 | + level1: 'neutral10', |
| 141 | + level2: 'neutral12', |
| 142 | + level3: 'neutral17', |
| 143 | + level4: 'neutral17', |
| 144 | + level5: 'neutral22', |
| 145 | + }, |
| 146 | + }, |
| 147 | +}; |
| 148 | + |
| 149 | +export function buildScheme( |
| 150 | + palette: Palette, |
| 151 | + ref: Ref, |
| 152 | + opts: { mode: 'light' | 'dark'; contrast?: Contrast } |
| 153 | +): ThemeColors { |
| 154 | + const contrast = opts.contrast ?? 'standard'; |
| 155 | + const tones = roleToTone[opts.mode][contrast]; |
| 156 | + const elevTones = elevationToTone[opts.mode][contrast]; |
| 157 | + |
| 158 | + const mapped = Object.fromEntries( |
| 159 | + (Object.keys(tones) as Array<keyof typeof tones>).map((role) => [ |
| 160 | + role, |
| 161 | + palette[tones[role]], |
| 162 | + ]) |
| 163 | + ) as MappedRoles; |
| 164 | + |
| 165 | + return { |
| 166 | + ...mapped, |
| 167 | + stateLayerPressed: color(palette[tones.onSurface]) |
| 168 | + .alpha(ref.stateOpacity.pressed) |
| 169 | + .rgb() |
| 170 | + .string(), |
| 171 | + elevation: { |
| 172 | + level0: 'transparent', |
| 173 | + level1: palette[elevTones.level1], |
| 174 | + level2: palette[elevTones.level2], |
| 175 | + level3: palette[elevTones.level3], |
| 176 | + level4: palette[elevTones.level4], |
| 177 | + level5: palette[elevTones.level5], |
| 178 | + }, |
| 179 | + }; |
| 180 | +} |
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