refactor(tui): extract standalone package (#31193)

packages/tui/src/context/runtime.tsx

@@ -0,0 +1,62 @@
+import { createComponent, createContext, type JSX, useContext } from "solid-js"
+
+export type TuiPaths = Readonly<{
+  cwd: string
+  home: string
+  state: string
+  worktree: string
+}>
+
+export type TuiTerminalEnvironment = Readonly<{
+  platform: string
+  multiplexer?: "tmux" | "screen"
+  displayServer?: "wayland" | "x11"
+}>
+
+export type TuiStartup = Readonly<{
+  initialRoute?: unknown
+  skipInitialLoading: boolean
+}>
+
+const PathsContext = createContext<TuiPaths>()
+const TerminalEnvironmentContext = createContext<TuiTerminalEnvironment>()
+const StartupContext = createContext<TuiStartup>()
+
+function provider<T>(context: ReturnType<typeof createContext<T>>, value: T, children: () => JSX.Element) {
+  return createComponent(context.Provider, {
+    value: Object.freeze({ ...value }),
+    get children() {
+      return children()
+    },
+  })
+}
+
+export function TuiPathsProvider(props: { value: TuiPaths; children: JSX.Element }) {
+  return provider(PathsContext, props.value, () => props.children)
+}
+
+export function TuiTerminalEnvironmentProvider(props: { value: TuiTerminalEnvironment; children: JSX.Element }) {
+  return provider(TerminalEnvironmentContext, props.value, () => props.children)
+}
+
+export function TuiStartupProvider(props: { value: TuiStartup; children: JSX.Element }) {
+  return provider(StartupContext, props.value, () => props.children)
+}
+
+function required<T>(context: ReturnType<typeof createContext<T>>, name: string) {
+  const value = useContext(context)
+  if (!value) throw new Error(`${name} is missing`)
+  return value
+}
+
+export function useTuiPaths() {
+  return required(PathsContext, "TuiPathsProvider")
+}
+
+export function useTuiTerminalEnvironment() {
+  return required(TerminalEnvironmentContext, "TuiTerminalEnvironmentProvider")
+}
+
+export function useTuiStartup() {
+  return required(StartupContext, "TuiStartupProvider")
+}