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import { onMount, onCleanup, createEffect } from "solid-js"
import { createStore } from "solid-js/store"
import type { DesktopTheme } from "./types"
import { resolveThemeVariant, themeToCss } from "./resolve"
import { DEFAULT_THEMES } from "./default-themes"
import { createSimpleContext } from "../context/helper"
export type ColorScheme = "light" | "dark" | "system"
const STORAGE_KEYS = {
THEME_ID: "opencode-theme-id",
COLOR_SCHEME: "opencode-color-scheme",
THEME_CSS_LIGHT: "opencode-theme-css-light",
THEME_CSS_DARK: "opencode-theme-css-dark",
} as const
const THEME_STYLE_ID = "oc-theme"
function ensureThemeStyleElement(): HTMLStyleElement {
const existing = document.getElementById(THEME_STYLE_ID) as HTMLStyleElement | null
if (existing) return existing
const element = document.createElement("style")
element.id = THEME_STYLE_ID
document.head.appendChild(element)
return element
}
function getSystemMode(): "light" | "dark" {
return window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light"
}
function applyThemeCss(theme: DesktopTheme, themeId: string, mode: "light" | "dark") {
const isDark = mode === "dark"
const variant = isDark ? theme.dark : theme.light
const tokens = resolveThemeVariant(variant, isDark)
const css = themeToCss(tokens)
if (themeId !== "oc-1") {
try {
localStorage.setItem(isDark ? STORAGE_KEYS.THEME_CSS_DARK : STORAGE_KEYS.THEME_CSS_LIGHT, css)
} catch {}
}
const fullCss = `:root {
color-scheme: ${mode};
--text-mix-blend-mode: ${isDark ? "plus-lighter" : "multiply"};
${css}
}`
document.getElementById("oc-theme-preload")?.remove()
ensureThemeStyleElement().textContent = fullCss
document.documentElement.dataset.theme = themeId
document.documentElement.dataset.colorScheme = mode
}
function cacheThemeVariants(theme: DesktopTheme, themeId: string) {
if (themeId === "oc-1") return
for (const mode of ["light", "dark"] as const) {
const isDark = mode === "dark"
const variant = isDark ? theme.dark : theme.light
const tokens = resolveThemeVariant(variant, isDark)
const css = themeToCss(tokens)
try {
localStorage.setItem(isDark ? STORAGE_KEYS.THEME_CSS_DARK : STORAGE_KEYS.THEME_CSS_LIGHT, css)
} catch {}
}
}
export const { use: useTheme, provider: ThemeProvider } = createSimpleContext({
name: "Theme",
init: (props: { defaultTheme?: string }) => {
const [store, setStore] = createStore({
themes: DEFAULT_THEMES as Record<string, DesktopTheme>,
themeId: props.defaultTheme ?? "oc-1",
colorScheme: "system" as ColorScheme,
mode: getSystemMode(),
previewThemeId: null as string | null,
previewScheme: null as ColorScheme | null,
})
onMount(() => {
const mediaQuery = window.matchMedia("(prefers-color-scheme: dark)")
const handler = () => {
if (store.colorScheme === "system") {
setStore("mode", getSystemMode())
}
}
mediaQuery.addEventListener("change", handler)
onCleanup(() => mediaQuery.removeEventListener("change", handler))
const savedTheme = localStorage.getItem(STORAGE_KEYS.THEME_ID)
const savedScheme = localStorage.getItem(STORAGE_KEYS.COLOR_SCHEME) as ColorScheme | null
if (savedTheme && store.themes[savedTheme]) {
setStore("themeId", savedTheme)
}
if (savedScheme) {
setStore("colorScheme", savedScheme)
if (savedScheme !== "system") {
setStore("mode", savedScheme)
}
}
const currentTheme = store.themes[store.themeId]
if (currentTheme) {
cacheThemeVariants(currentTheme, store.themeId)
}
})
createEffect(() => {
const theme = store.themes[store.themeId]
if (theme) {
applyThemeCss(theme, store.themeId, store.mode)
}
})
const setTheme = (id: string) => {
const theme = store.themes[id]
if (!theme) {
console.warn(`Theme "${id}" not found`)
return
}
setStore("themeId", id)
localStorage.setItem(STORAGE_KEYS.THEME_ID, id)
cacheThemeVariants(theme, id)
}
const setColorScheme = (scheme: ColorScheme) => {
setStore("colorScheme", scheme)
localStorage.setItem(STORAGE_KEYS.COLOR_SCHEME, scheme)
setStore("mode", scheme === "system" ? getSystemMode() : scheme)
}
return {
themeId: () => store.themeId,
colorScheme: () => store.colorScheme,
mode: () => store.mode,
themes: () => store.themes,
setTheme,
setColorScheme,
registerTheme: (theme: DesktopTheme) => setStore("themes", theme.id, theme),
previewTheme: (id: string) => {
const theme = store.themes[id]
if (!theme) return
setStore("previewThemeId", id)
const previewMode = store.previewScheme
? store.previewScheme === "system"
? getSystemMode()
: store.previewScheme
: store.mode
applyThemeCss(theme, id, previewMode)
},
previewColorScheme: (scheme: ColorScheme) => {
setStore("previewScheme", scheme)
const previewMode = scheme === "system" ? getSystemMode() : scheme
const id = store.previewThemeId ?? store.themeId
const theme = store.themes[id]
if (theme) {
applyThemeCss(theme, id, previewMode)
}
},
commitPreview: () => {
if (store.previewThemeId) {
setTheme(store.previewThemeId)
}
if (store.previewScheme) {
setColorScheme(store.previewScheme)
}
setStore("previewThemeId", null)
setStore("previewScheme", null)
},
cancelPreview: () => {
setStore("previewThemeId", null)
setStore("previewScheme", null)
const theme = store.themes[store.themeId]
if (theme) {
applyThemeCss(theme, store.themeId, store.mode)
}
},
}
},
})
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