更新

2026-08-11 17:41:36 +08:00
parent cfe4c82c90
commit 03fe4ddf9d
18771 changed files with 3617239 additions and 0 deletions
@@ -0,0 +1,41 @@
+var Class = require('./Class');
+var clone = require('./clone');
+var remove = require('./remove');
+exports = Class({
+    initialize: function ReduceStore(reducer, initialState) {
+        this._reducer = reducer;
+        this._state = initialState;
+        this._curListeners = [];
+        this._nextListeners = this._curListeners;
+    },
+    subscribe: function(listener) {
+        var isSubscribed = true;
+        this._ensureCanMutateNextListeners();
+        this._nextListeners.push(listener);
+        var self = this;
+        return function() {
+            if (!isSubscribed) return;
+            isSubscribed = false;
+            self._ensureCanMutateNextListeners();
+            remove(self._nextListeners, function(val) {
+                return val === listener;
+            });
+        };
+    },
+    dispatch: function(action) {
+        this._state = this._reducer(this._state, action);
+        var listeners = (this._curListeners = this._nextListeners);
+        for (var i = 0, len = listeners.length; i < len; i++) listeners[i]();
+        return action;
+    },
+    getState: function() {
+        return this._state;
+    },
+    _ensureCanMutateNextListeners: function() {
+        if (this._nextListeners === this._curListeners) {
+            this._nextListeners = clone(this._curListeners);
+        }
+    }
+});
+
+module.exports = exports;