state-tree - npm Package Compare versions

Comparing version 0.2.4 to 0.2.5

index.js

@@ -1,5 +0,11 @@
-// keep backward compatibility
+// class factories exported as CommonJS module "default"
 var StateTree = require('./lib/stateTree').default
-StateTree.computed = require('./lib/computed').default
+var Computed = require('./lib/computed').default
 
-module.exports = StateTree
+module.exports = function (initialState) {
+  return new StateTree(initialState)
+}
+
+module.exports.computed = function (deps, cb) {
+  return new Computed(deps, cb)
+}

lib/computed.d.ts

 declare class Computed {
-    static getByPath: any;
     private _deps;
     private _cb;
+    static getByPath: any;
+    static hasChanged: any;
+    private _value;
+    private _computedHasChanged;
     constructor(_deps: any, _cb: any);
     getDepsMap(): any;
     get(passedState: any): any;
+    hasChanged(changes: any): boolean;
 }
 export default Computed;

lib/computed.js

@@ -5,6 +5,6 @@ "use strict";
     function Computed(_deps, _cb) {
-        if (!(this instanceof Computed))
-            return new Computed(_deps, _cb);
         this._deps = _deps;
         this._cb = _cb;
+        this._computedHasChanged = true;
+        this._value = null;
     }
@@ -16,12 +16,34 @@ Computed.prototype.getDepsMap = function () {
         var _this = this;
-        return this._cb(Object.keys(this._deps).reduce(function (props, key) {
-            if (typeof _this._deps[key] === 'string') {
-                var path = _this._deps[key].split('.');
-                props[key] = Computed.getByPath(path, passedState);
+        if (this._computedHasChanged) {
+            this._computedHasChanged = false;
+            this._value = this._cb(Object.keys(this._deps).reduce(function (props, key) {
+                if (typeof _this._deps[key] === 'string') {
+                    var path = _this._deps[key].split('.');
+                    props[key] = Computed.getByPath(path, passedState);
+                }
+                else {
+                    props[key] = _this._deps[key].get(passedState);
+                }
+                return props;
+            }, {}));
+            return this._value;
+        }
+        else {
+            return this._value;
+        }
+    };
+    // Can optimize by remembering the changes in case multiple
+    // components checks the computed, but very unlikely
+    Computed.prototype.hasChanged = function (changes) {
+        if (this._computedHasChanged) {
+            return true;
+        }
+        for (var key in this._deps) {
+            if ((typeof this._deps[key] === 'string' && Computed.hasChanged(this._deps[key], changes)) ||
+                (typeof this._deps[key] !== 'string' && this._deps[key].hasChanged(changes))) {
+                this._computedHasChanged = true;
+                return true;
             }
-            else {
-                props[key] = _this._deps[key].get(passedState);
-            }
-            return props;
-        }, {}));
+        }
+        return false;
     };
@@ -31,4 +53,5 @@ return Computed;
 Computed.getByPath = utils_1.getByPath;
+Computed.hasChanged = utils_1.hasChanged;
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.default = Computed;
 //# sourceMappingURL=computed.js.map

lib/stateTree.d.ts

@@ -0,9 +1,11 @@
+import { setReferences, cleanReferences } from './references';
+import { getByPath } from './utils';
 export declare type Callback = (changes: any) => void;
 declare class StateTree {
+    static setReferences: typeof setReferences;
+    static cleanReferences: typeof cleanReferences;
+    static getByPath: typeof getByPath;
     private _state;
     private _subscribers;
     private _changes;
-    static setReferences: any;
-    static cleanReferences: any;
-    static getByPath: any;
     constructor(initialState: any);
@@ -10,0 +12,0 @@ private _updateChanges(host, key);

lib/stateTree.js

@@ -6,7 +6,5 @@ "use strict";
     function StateTree(initialState) {
-        if (!(this instanceof StateTree))
-            return new StateTree(initialState);
+        this._subscribers = [];
+        this._changes = {};
         this._state = StateTree.setReferences(initialState, []);
-        this._changes = {};
-        this._subscribers = [];
     }
@@ -164,9 +162,9 @@ StateTree.prototype._updateChanges = function (host, key) {
     };
+    StateTree.setReferences = references_1.setReferences;
+    StateTree.cleanReferences = references_1.cleanReferences;
+    StateTree.getByPath = utils_1.getByPath;
     return StateTree;
 }());
-StateTree.setReferences = references_1.setReferences;
-StateTree.cleanReferences = references_1.cleanReferences;
-StateTree.getByPath = utils_1.getByPath;
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.default = StateTree;
 //# sourceMappingURL=stateTree.js.map

lib/utils.d.ts

@@ -5,1 +5,2 @@ export declare function getByPath(path: any, state: any, forcePath?: any): any;
 };
+export declare function hasChanged(path: any, changes: any): any;

lib/utils.js

@@ -61,2 +61,8 @@ "use strict";
 exports.deepmerge = deepmerge;
+function hasChanged(path, changes) {
+    return path.split('.').reduce(function (changes, key) {
+        return changes ? changes[key] : false;
+    }, changes);
+}
+exports.hasChanged = hasChanged;
 //# sourceMappingURL=utils.js.map

package.json

 {
   "name": "state-tree",
-  "version": "0.2.4",
+  "version": "0.2.5",
   "description": "A state tree that handles reference updates and lets you flush a description of changes",
   "main": "index.js",
+  "typings": "index.d.ts",
   "directories": {
@@ -7,0 +8,0 @@ "test": "tests"

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Lines of code

502

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