1.1.2

src/Data/Modifiable.js

@@ -0,0 +1,139 @@
+export default class Modifiable
+{
+    static _copy(val){
+        if (typeof val === 'object' && val !== null)
+        {
+            let rt = {};
+            for(var i in val)
+                if (val[i] instanceof Array)
+                    // copy array
+                    rt[i] = [...val[i]];
+                else
+                    rt[i] = val[i];
+
+            return rt;
+        }
+        else 
+            return val;
+    }
+
+    // @TODO: Remove this when esiur adds suport to partially modified arrays with modified flag
+    static _areEqual(ar1, ar2)
+    {
+        if (!(ar1 instanceof Array) || !( ar2 instanceof Array))
+            return false;
+
+        if (ar1.length != ar2.length)
+            return false;
+
+        for(var i = 0; i < ar1.length; i++)
+            if (ar1[i] != ar2[i])
+                return false;
+        
+        return true;
+    }
+
+    constructor(original){
+
+        this._events = {};
+        this._data = Modifiable._copy(original);
+        this._original = original;
+
+        for(let p in this._data)
+        {
+            if (p.startsWith("_"))
+                continue;
+
+            this._register(":" + p);
+
+            Object.defineProperty(this, p, {
+                get() {
+                  return this._data[p];
+                },
+                set(value) {
+                  this._data[p] = value;
+                  this._emit(":" + p, value);
+                }
+              });
+        }
+
+    }
+
+
+    get _diff() {
+        if (this._original == null)
+            return this._data;
+
+        var rt = {};
+        for (var i in this._data)
+            if (this._data[i] != this._original[i])
+            {
+                if (this._data[i] instanceof Array && Modifiable._areEqual(this._data[i], this._original[i]))
+                    continue;
+                else
+                    rt[i] = this._data[i];
+            }
+            
+        return rt;
+    }
+
+    _register(event)
+    {
+        this._events[event] = [];
+    }
+ 
+
+    _emit(event)
+    {
+        event = event.toLowerCase();
+        var args = Array.prototype.slice.call(arguments, 1);
+        if (this._events[event])
+            for(var i = 0; i < this._events[event].length; i++)
+                if (this._events[event][i].f.apply(this._events[event][i].i, args))
+                    return true;
+
+        return false;
+    }
+
+    _emitArgs(event, args)
+    {
+        event = event.toLowerCase();
+        if (this._events[event])
+            for(var i = 0; i < this._events[event].length; i++)
+                if (this._events[event][i].f.apply(this._events[event][i].i, args))
+                    return true;
+        return this;
+    }
+
+    on(event, fn, issuer)
+    {
+        if (!(fn instanceof Function))
+            return this;
+
+        event = event.toLowerCase();
+        // add
+        if (!this._events[event])
+            this._events[event] = [];
+        this._events[event].push({f: fn, i: issuer == null ? this: issuer});
+        return this;
+    }
+
+    
+    off(event, fn)
+    {
+        event = event.toLowerCase();
+        if (this._events[event])
+        {
+            if (fn)
+            {
+                for(var i = 0; i < this._events[event].length; i++)
+                    if (this._events[event][i].f == fn)
+                        this._events[event].splice(i--, 1);
+            }
+            else
+            {
+                this._events[event] = [];
+            }
+        }
+    }
+}