akkoma-fe/src/services/style_setter/style_setter.js

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import { convert } from 'chromatism'
import { rgb2hex, hex2rgb, rgba2css, getCssColor, relativeLuminance } from '../color_convert/color_convert.js'
import { getColors, computeDynamicColor, getOpacitySlot } from '../theme_data/theme_data.service.js'
export const applyTheme = (input) => {
const { rules } = generatePreset(input)
const head = document.head
const body = document.body
body.classList.add('hidden')
const styleEl = document.createElement('style')
head.appendChild(styleEl)
const styleSheet = styleEl.sheet
styleSheet.toString()
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styleSheet.insertRule(`body { ${rules.radii} }`, 'index-max')
styleSheet.insertRule(`body { ${rules.colors} }`, 'index-max')
styleSheet.insertRule(`body { ${rules.shadows} }`, 'index-max')
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styleSheet.insertRule(`body { ${rules.fonts} }`, 'index-max')
body.classList.remove('hidden')
}
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export const getCssShadow = (input, usesDropShadow) => {
if (input.length === 0) {
return 'none'
}
return input
.filter(_ => usesDropShadow ? _.inset : _)
.map((shad) => [
shad.x,
shad.y,
shad.blur,
shad.spread
].map(_ => _ + 'px').concat([
getCssColor(shad.color, shad.alpha),
shad.inset ? 'inset' : ''
]).join(' ')).join(', ')
}
const getCssShadowFilter = (input) => {
if (input.length === 0) {
return 'none'
}
return input
// drop-shadow doesn't support inset or spread
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.filter((shad) => !shad.inset && Number(shad.spread) === 0)
.map((shad) => [
shad.x,
shad.y,
// drop-shadow's blur is twice as strong compared to box-shadow
shad.blur / 2
].map(_ => _ + 'px').concat([
getCssColor(shad.color, shad.alpha)
]).join(' '))
.map(_ => `drop-shadow(${_})`)
.join(' ')
}
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export const generateColors = (themeData) => {
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const sourceColors = !themeData.themeEngineVersion
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? colors2to3(themeData.colors || themeData)
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: themeData.colors || themeData
const { colors, opacity } = getColors(sourceColors, themeData.opacity || {})
const htmlColors = Object.entries(colors)
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.reduce((acc, [k, v]) => {
if (!v) return acc
acc.solid[k] = rgb2hex(v)
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acc.complete[k] = typeof v.a === 'undefined' ? rgb2hex(v) : rgba2css(v)
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return acc
}, { complete: {}, solid: {} })
return {
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rules: {
colors: Object.entries(htmlColors.complete)
.filter(([k, v]) => v)
.map(([k, v]) => `--${k}: ${v}`)
.join(';')
},
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theme: {
colors: htmlColors.solid,
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opacity
}
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}
}
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export const generateRadii = (input) => {
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let inputRadii = input.radii || {}
// v1 -> v2
if (typeof input.btnRadius !== 'undefined') {
inputRadii = Object
.entries(input)
.filter(([k, v]) => k.endsWith('Radius'))
.reduce((acc, e) => { acc[e[0].split('Radius')[0]] = e[1]; return acc }, {})
}
const radii = Object.entries(inputRadii).filter(([k, v]) => v).reduce((acc, [k, v]) => {
acc[k] = v
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return acc
}, {
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btn: 4,
input: 4,
checkbox: 2,
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panel: 10,
avatar: 5,
avatarAlt: 50,
tooltip: 2,
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attachment: 5
})
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return {
rules: {
radii: Object.entries(radii).filter(([k, v]) => v).map(([k, v]) => `--${k}Radius: ${v}px`).join(';')
},
theme: {
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radii
}
}
}
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export const generateFonts = (input) => {
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const fonts = Object.entries(input.fonts || {}).filter(([k, v]) => v).reduce((acc, [k, v]) => {
acc[k] = Object.entries(v).filter(([k, v]) => v).reduce((acc, [k, v]) => {
acc[k] = v
return acc
}, acc[k])
return acc
}, {
interface: {
family: 'sans-serif'
},
input: {
family: 'inherit'
},
post: {
family: 'inherit'
},
postCode: {
family: 'monospace'
}
})
return {
rules: {
fonts: Object
.entries(fonts)
.filter(([k, v]) => v)
.map(([k, v]) => `--${k}Font: ${v.family}`).join(';')
},
theme: {
fonts
}
}
}
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const border = (top, shadow) => ({
x: 0,
y: top ? 1 : -1,
blur: 0,
spread: 0,
color: shadow ? '#000000' : '#FFFFFF',
alpha: 0.2,
inset: true
})
const buttonInsetFakeBorders = [border(true, false), border(false, true)]
const inputInsetFakeBorders = [border(true, true), border(false, false)]
const hoverGlow = {
x: 0,
y: 0,
blur: 4,
spread: 0,
color: '--faint',
alpha: 1
}
export const DEFAULT_SHADOWS = {
panel: [{
x: 1,
y: 1,
blur: 4,
spread: 0,
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color: '#000000',
alpha: 0.6
}],
topBar: [{
x: 0,
y: 0,
blur: 4,
spread: 0,
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color: '#000000',
alpha: 0.6
}],
popup: [{
x: 2,
y: 2,
blur: 3,
spread: 0,
color: '#000000',
alpha: 0.5
}],
avatar: [{
x: 0,
y: 1,
blur: 8,
spread: 0,
color: '#000000',
alpha: 0.7
}],
avatarStatus: [],
panelHeader: [],
button: [{
x: 0,
y: 0,
blur: 2,
spread: 0,
color: '#000000',
alpha: 1
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}, ...buttonInsetFakeBorders],
buttonHover: [hoverGlow, ...buttonInsetFakeBorders],
buttonPressed: [hoverGlow, ...inputInsetFakeBorders],
input: [...inputInsetFakeBorders, {
x: 0,
y: 0,
blur: 2,
inset: true,
spread: 0,
color: '#000000',
alpha: 1
}]
}
export const generateShadows = (input, colors) => {
// TODO this is a small hack for `mod` to work with shadows
// this is used to get the "context" of shadow, i.e. for `mod` properly depend on background color of element
const hackContextDict = {
button: 'btn',
panel: 'bg',
top: 'topBar',
popup: 'popover',
avatar: 'bg',
panelHeader: 'panel',
input: 'input'
}
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const inputShadows = input.shadows && !input.themeEngineVersion
? shadows2to3(input.shadows, input.opacity)
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: input.shadows || {}
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const shadows = Object.entries({
...DEFAULT_SHADOWS,
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...inputShadows
}).reduce((shadowsAcc, [slotName, shadowDefs]) => {
const slotFirstWord = slotName.replace(/[A-Z].*$/, '')
const colorSlotName = hackContextDict[slotFirstWord]
const isLightOnDark = relativeLuminance(convert(colors[colorSlotName]).rgb) < 0.5
const mod = isLightOnDark ? 1 : -1
const newShadow = shadowDefs.reduce((shadowAcc, def) => [
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...shadowAcc,
{
...def,
color: rgb2hex(computeDynamicColor(
def.color,
(variableSlot) => convert(colors[variableSlot]).rgb,
mod
))
}
], [])
return { ...shadowsAcc, [slotName]: newShadow }
}, {})
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return {
rules: {
shadows: Object
.entries(shadows)
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// TODO for v2.2: if shadow doesn't have non-inset shadows with spread > 0 - optionally
// convert all non-inset shadows into filter: drop-shadow() to boost performance
.map(([k, v]) => [
`--${k}Shadow: ${getCssShadow(v)}`,
`--${k}ShadowFilter: ${getCssShadowFilter(v)}`,
`--${k}ShadowInset: ${getCssShadow(v, true)}`
].join(';'))
.join(';')
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},
theme: {
shadows
}
}
}
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export const composePreset = (colors, radii, shadows, fonts) => {
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return {
rules: {
...shadows.rules,
...colors.rules,
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...radii.rules,
...fonts.rules
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},
theme: {
...shadows.theme,
...colors.theme,
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...radii.theme,
...fonts.theme
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}
}
}
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export const generatePreset = (input) => {
const colors = generateColors(input)
return composePreset(
colors,
generateRadii(input),
generateShadows(input, colors.theme.colors, colors.mod),
generateFonts(input)
)
}
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export const getThemes = () => {
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const cache = 'no-store'
return window.fetch('/static/styles.json', { cache })
.then((data) => data.json())
.then((themes) => {
return Object.entries(themes).map(([k, v]) => {
let promise = null
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if (typeof v === 'object') {
promise = Promise.resolve(v)
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} else if (typeof v === 'string') {
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promise = window.fetch(v, { cache })
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.then((data) => data.json())
.catch((e) => {
console.error(e)
return null
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})
}
return [k, promise]
})
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})
.then((promises) => {
return promises
.reduce((acc, [k, v]) => {
acc[k] = v
return acc
}, {})
})
}
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export const colors2to3 = (colors) => {
return Object.entries(colors).reduce((acc, [slotName, color]) => {
const btnPositions = ['', 'Panel', 'TopBar']
switch (slotName) {
case 'lightBg':
return { ...acc, highlight: color }
case 'btnText':
return {
...acc,
...btnPositions
.reduce(
(statePositionAcc, position) =>
({ ...statePositionAcc, ['btn' + position + 'Text']: color })
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, {}
)
}
default:
return { ...acc, [slotName]: color }
}
}, {})
}
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/**
* This handles compatibility issues when importing v2 theme's shadows to current format
*
* Back in v2 shadows allowed you to use dynamic colors however those used pure CSS3 variables
*/
export const shadows2to3 = (shadows, opacity) => {
return Object.entries(shadows).reduce((shadowsAcc, [slotName, shadowDefs]) => {
const isDynamic = ({ color }) => color.startsWith('--')
const getOpacity = ({ color }) => opacity[getOpacitySlot(color.substring(2).split(',')[0])]
const newShadow = shadowDefs.reduce((shadowAcc, def) => [
...shadowAcc,
{
...def,
alpha: isDynamic(def) ? getOpacity(def) || 1 : def.alpha
}
], [])
return { ...shadowsAcc, [slotName]: newShadow }
}, {})
}
export const getPreset = (val) => {
return getThemes()
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.then((themes) => themes[val] ? themes[val] : themes['pleroma-dark'])
.then((theme) => {
const isV1 = Array.isArray(theme)
const data = isV1 ? {} : theme.theme
if (isV1) {
const bg = hex2rgb(theme[1])
const fg = hex2rgb(theme[2])
const text = hex2rgb(theme[3])
const link = hex2rgb(theme[4])
const cRed = hex2rgb(theme[5] || '#FF0000')
const cGreen = hex2rgb(theme[6] || '#00FF00')
const cBlue = hex2rgb(theme[7] || '#0000FF')
const cOrange = hex2rgb(theme[8] || '#E3FF00')
data.colors = { bg, fg, text, link, cRed, cBlue, cGreen, cOrange }
}
return { theme: data, source: theme.source }
})
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}
export const setPreset = (val) => getPreset(val).then(data => applyTheme(data.theme))