MVCObject-0.21.min.js

/**
  Available on [GitHub](https://github.com/dcporter/mvcobject).

  ### License
  Copyright 2011 urbanplum.eu and Dave Porter. Modified from the original by
  Dave Porter.

  Licensed under the Apache License, Version 2.0 (the "License"); you may not
  use this file except in compliance with the License. You may obtain a copy of
  the License at

  http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  License for the specific language governing permissions and limitations under
  the License.

  @author John Smith - john@urbanplum.eu
  @author Dave Porter - dcporter@gmail.com
 */
function MVCObject(){}MVCObject.prototype.bindTo=function(e,t,n,r){n=n||e;var i;if(!(n in t)){throw'Undefined: property "'+n+'" on target object.'}if(!t._isPropertyBound(n)){t[n]={__my_index:0,__observer_indexes:[],__shared_object:{__value:t[n],__observers:[{obj:t,key:n}]}}}var s=t[n].__shared_object.__observers.length;t[n].__observer_indexes.push(s);if(this._isPropertyBound(e)){if(this[e]["__my_index"]!==0)return;this._updateObserverIndexes(e,s);t[n].__shared_object.__observers=t[n].__shared_object.__observers.concat(this[e].__shared_object.__observers);i=this[e].__shared_object.__value}else{i=this[e];this[e]={__my_index:s,__observer_indexes:[],__shared_object:null};t[n].__shared_object.__observers.push({obj:this,key:e})}for(var o in t[n].__shared_object.__observers){if(o<s||t[n].__shared_object.__observers[o]===null)continue;t[n].__shared_object.__observers[o].obj[t[n].__shared_object.__observers[o].key].__shared_object=t[n].__shared_object;if(t[n].__shared_object.__value===i||o==s&&r)continue;if(t[n].__shared_object.__observers[o].key+"_changed"in t[n].__shared_object.__observers[o].obj)t[n].__shared_object.__observers[o].obj[t[n].__shared_object.__observers[o].key+"_changed"]()}};MVCObject.prototype._updateObserverIndexes=function(e,t){this[e]["__my_index"]+=t;for(var n in this[e].__observer_indexes){if(this[e].__shared_object.__observers[this[e].__observer_indexes[n]]===null)continue;this[e].__shared_object.__observers[this[e].__observer_indexes[n]].obj._updateObserverIndexes(this[e].__shared_object.__observers[this[e].__observer_indexes[n]].key,t);this[e].__observer_indexes[n]+=t}};MVCObject.prototype._isPropertyBound=function(e){return this[e]!==null&&typeof this[e]==="object"&&"__my_index"in this[e]};MVCObject.prototype.get=function(e){return this._isPropertyBound(e)?this[e].__shared_object.__value:this[e]};MVCObject.prototype.set=function(e,t){if(!e in this)throw'Cannot set value for undefined property "'+e+'".';if(this._isPropertyBound(e)){if(this[e].__shared_object.__value===t)return;this[e].__shared_object.__value=t;for(var n in this[e].__shared_object.__observers){if(this[e].__shared_object.__observers[n]===null)continue;if(this[e].__shared_object.__observers[n].key+"_changed"in this[e].__shared_object.__observers[n].obj){this[e].__shared_object.__observers[n].obj[this[e].__shared_object.__observers[n].key+"_changed"]()}}return}if(this[e]===t)return;this[e]=t;if(e+"_changed"in this)this[e+"_changed"]()};MVCObject.prototype.setValues=function(e){for(var t in e){this.set(t,e[t])}};MVCObject.prototype._rebindObservers=function(e,t){for(var n in this[t].__observer_indexes){var r;if(this[t].__shared_object.__observers[this[t].__observer_indexes[n]]!==null){r=this[t].__shared_object.__observers.splice(this[t].__observer_indexes[n],1,null)[0];r.obj._rebindObservers(e,r.key);r.obj[r.key].__shared_object=e;this[t].__observer_indexes.splice(n,1,e.__observers.length);r.obj[r.key]["__my_index"]=e.__observers.length}else{r=null}e.__observers.push(r);this[t]["__my_index"]=e.__observers.length}};MVCObject.prototype.unbind=function(e){if(!this[e]||typeof this[e]!=="object"||!("__my_index"in this[e])||this[e]["__my_index"]===0)return;this[e].__shared_object.__observers[this[e]["__my_index"]]=null;if(this[e].__observer_indexes.length===0){this[e]=this[e].__shared_object.__value;return}var t={__observers:[{obj:this,key:e}],__value:this[e].__shared_object.__value};this._rebindObservers(t,e,0);this[e]["__my_index"]=0;this[e].__shared_object=t};MVCObject.prototype.unbindAll=function(){for(var e in this){if(!this._isPropertyBound(e))continue;this.unbind(e)}}