.

node_modules/next/dist/esm/client/components/use-action-queue.js

@@ -0,0 +1,116 @@
+import React, { use, useMemo, useOptimistic } from 'react';
+import { isThenable } from '../../shared/lib/is-thenable';
+import { ACTION_REFRESH } from './router-reducer/router-reducer-types';
+// The app router state lives outside of React, so we can import the dispatch
+// method directly wherever we need it, rather than passing it around via props
+// or context.
+let dispatch = null;
+/**
+ * Called when the instant navigation test lock is released. If the router
+ * is initialized, dispatches a soft refresh to fetch dynamic data. If not
+ * (e.g. the lock was released before hydration finished), falls back to a
+ * hard reload.
+ */ export function refreshOnInstantNavigationUnlock() {
+    if (process.env.__NEXT_EXPOSE_TESTING_API) {
+        if (dispatch !== null) {
+            dispatch({
+                type: ACTION_REFRESH,
+                bypassCacheInvalidation: true
+            });
+        } else {
+            window.location.reload();
+        }
+    }
+}
+export function dispatchAppRouterAction(action) {
+    if (dispatch === null) {
+        throw Object.defineProperty(new Error('Internal Next.js error: Router action dispatched before initialization.'), "__NEXT_ERROR_CODE", {
+            value: "E668",
+            enumerable: false,
+            configurable: true
+        });
+    }
+    dispatch(action);
+}
+// Optimistic state setter for experimental_gesturePush. Only should be used
+// during a gesture transition.
+let setGestureRouterState = null;
+export function dispatchGestureState(state) {
+    if (setGestureRouterState === null) {
+        throw Object.defineProperty(new Error('Internal Next.js error: Router action dispatched before initialization.'), "__NEXT_ERROR_CODE", {
+            value: "E668",
+            enumerable: false,
+            configurable: true
+        });
+    }
+    setGestureRouterState(state);
+}
+const __DEV__ = process.env.NODE_ENV !== 'production';
+const promisesWithDebugInfo = __DEV__ ? new WeakMap() : null;
+export function useActionQueue(actionQueue) {
+    const [canonicalState, setState] = React.useState(actionQueue.state);
+    // Wrap the canonical state in useOptimistic to support
+    // experimental_gesturePush. During a gesture transition, this returns a fork
+    // of the router state that represents the eventual target if/when the gesture
+    // completes. Otherwise it returns the canonical state.
+    const [state, setGesture] = useOptimistic(canonicalState);
+    if (typeof window !== 'undefined') {
+        setGestureRouterState = setGesture;
+    }
+    // Because of a known issue that requires to decode Flight streams inside the
+    // render phase, we have to be a bit clever and assign the dispatch method to
+    // a module-level variable upon initialization. The useState hook in this
+    // module only exists to synchronize state that lives outside of React.
+    // Ideally, what we'd do instead is pass the state as a prop to root.render;
+    // this is conceptually how we're modeling the app router state, despite the
+    // weird implementation details.
+    let nextDispatch;
+    if (process.env.NODE_ENV !== 'production') {
+        const { useAppDevRenderingIndicator } = require('../../next-devtools/userspace/use-app-dev-rendering-indicator');
+        // eslint-disable-next-line react-hooks/rules-of-hooks
+        const appDevRenderingIndicator = useAppDevRenderingIndicator();
+        nextDispatch = (action)=>{
+            appDevRenderingIndicator(()=>{
+                actionQueue.dispatch(action, setState);
+            });
+        };
+    } else {
+        nextDispatch = (action)=>actionQueue.dispatch(action, setState);
+    }
+    if (typeof window !== 'undefined') {
+        dispatch = nextDispatch;
+    }
+    // When navigating to a non-prefetched route, then App Router state will be
+    // blocked until the server responds. We need to transfer the `_debugInfo`
+    // from the underlying Flight response onto the top-level promise that is
+    // passed to React (via `use`) so that the latency is accurately represented
+    // in the React DevTools.
+    const stateWithDebugInfo = useMemo(()=>{
+        if (!__DEV__) {
+            return state;
+        }
+        if (isThenable(state)) {
+            // useMemo can't be used to cache a Promise since the memoized value is thrown
+            // away when we suspend. So we use a WeakMap to cache the Promise with debug info.
+            let promiseWithDebugInfo = promisesWithDebugInfo.get(state);
+            if (promiseWithDebugInfo === undefined) {
+                const debugInfo = [];
+                promiseWithDebugInfo = Promise.resolve(state).then((asyncState)=>{
+                    if (asyncState.debugInfo !== null) {
+                        debugInfo.push(...asyncState.debugInfo);
+                    }
+                    return asyncState;
+                });
+                promiseWithDebugInfo._debugInfo = debugInfo;
+                promisesWithDebugInfo.set(state, promiseWithDebugInfo);
+            }
+            return promiseWithDebugInfo;
+        }
+        return state;
+    }, [
+        state
+    ]);
+    return isThenable(stateWithDebugInfo) ? use(stateWithDebugInfo) : stateWithDebugInfo;
+}
+
+//# sourceMappingURL=use-action-queue.js.map