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| System.register(['core-js'], function (_export) {
'use strict';
var core, SetterObserver, OoPropertyObserver, OoObjectObserver, UndefinedPropertyObserver;
function _classCallCheck(instance, Constructor) { Iif (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }
return {
setters: [function (_coreJs) {
core = _coreJs['default'];
}],
execute: function () {
SetterObserver = (function () {
function SetterObserver(taskQueue, obj, propertyName) {
_classCallCheck(this, SetterObserver);
this.taskQueue = taskQueue;
this.obj = obj;
this.propertyName = propertyName;
this.callbacks = [];
this.queued = false;
this.observing = false;
}
SetterObserver.prototype.getValue = function getValue() {
return this.obj[this.propertyName];
};
SetterObserver.prototype.setValue = function setValue(newValue) {
this.obj[this.propertyName] = newValue;
};
SetterObserver.prototype.getterValue = function getterValue() {
return this.currentValue;
};
SetterObserver.prototype.setterValue = function setterValue(newValue) {
var oldValue = this.currentValue;
Eif (oldValue !== newValue) {
Eif (!this.queued) {
this.oldValue = oldValue;
this.queued = true;
this.taskQueue.queueMicroTask(this);
}
this.currentValue = newValue;
}
};
SetterObserver.prototype.call = function call() {
var callbacks = this.callbacks,
i = callbacks.length,
oldValue = this.oldValue,
newValue = this.currentValue;
this.queued = false;
while (i--) {
callbacks[i](newValue, oldValue);
}
};
SetterObserver.prototype.subscribe = function subscribe(callback) {
var callbacks = this.callbacks;
callbacks.push(callback);
if (!this.observing) {
this.convertProperty();
}
return function () {
callbacks.splice(callbacks.indexOf(callback), 1);
};
};
SetterObserver.prototype.convertProperty = function convertProperty() {
this.observing = true;
this.currentValue = this.obj[this.propertyName];
this.setValue = this.setterValue;
this.getValue = this.getterValue;
try {
Object.defineProperty(this.obj, this.propertyName, {
configurable: true,
enumerable: true,
get: this.getValue.bind(this),
set: this.setValue.bind(this)
});
} catch (_) {}
};
return SetterObserver;
})();
_export('SetterObserver', SetterObserver);
OoPropertyObserver = (function () {
function OoPropertyObserver(obj, propertyName, subscribe) {
_classCallCheck(this, OoPropertyObserver);
this.obj = obj;
this.propertyName = propertyName;
this.subscribe = subscribe;
}
OoPropertyObserver.prototype.getValue = function getValue() {
return this.obj[this.propertyName];
};
OoPropertyObserver.prototype.setValue = function setValue(newValue) {
this.obj[this.propertyName] = newValue;
};
return OoPropertyObserver;
})();
_export('OoPropertyObserver', OoPropertyObserver);
OoObjectObserver = (function () {
function OoObjectObserver(obj, observerLocator) {
_classCallCheck(this, OoObjectObserver);
this.obj = obj;
this.observerLocator = observerLocator;
this.observers = {};
this.callbacks = {};
this.callbackCount = 0;
}
OoObjectObserver.prototype.subscribe = function subscribe(propertyName, callback) {
if (this.callbacks[propertyName]) {
this.callbacks[propertyName].push(callback);
} else {
this.callbacks[propertyName] = [callback];
this.callbacks[propertyName].oldValue = this.obj[propertyName];
}
if (this.callbackCount === 0) {
this.handler = this.handleChanges.bind(this);
Object.observe(this.obj, this.handler, ['update', 'add']);
}
this.callbackCount++;
return this.unsubscribe.bind(this, propertyName, callback);
};
OoObjectObserver.prototype.unsubscribe = function unsubscribe(propertyName, callback) {
var callbacks = this.callbacks[propertyName],
index = callbacks.indexOf(callback);
Iif (index === -1) {
return;
}
callbacks.splice(index, 1);
Iif (callbacks.count = 0) {
callbacks.oldValue = null;
this.callbacks[propertyName] = null;
}
this.callbackCount--;
if (this.callbackCount === 0) {
Object.unobserve(this.obj, this.handler);
}
};
OoObjectObserver.prototype.getObserver = function getObserver(propertyName, descriptor) {
var propertyObserver = this.observers[propertyName];
Eif (!propertyObserver) {
if (descriptor) {
propertyObserver = this.observers[propertyName] = new OoPropertyObserver(this.obj, propertyName, this.subscribe.bind(this, propertyName));
} else {
propertyObserver = this.observers[propertyName] = new UndefinedPropertyObserver(this, this.obj, propertyName);
}
}
return propertyObserver;
};
OoObjectObserver.prototype.handleChanges = function handleChanges(changes) {
var properties = {},
i,
ii,
change,
propertyName,
oldValue,
newValue,
callbacks;
for (i = 0, ii = changes.length; i < ii; i++) {
change = changes[i];
properties[change.name] = change;
}
for (name in properties) {
callbacks = this.callbacks[name];
if (!callbacks) {
continue;
}
change = properties[name];
newValue = change.object[name];
oldValue = change.oldValue;
for (i = 0, ii = callbacks.length; i < ii; i++) {
callbacks[i](newValue, oldValue);
}
}
};
return OoObjectObserver;
})();
_export('OoObjectObserver', OoObjectObserver);
UndefinedPropertyObserver = (function () {
function UndefinedPropertyObserver(owner, obj, propertyName) {
_classCallCheck(this, UndefinedPropertyObserver);
this.owner = owner;
this.obj = obj;
this.propertyName = propertyName;
this.callbackMap = new Map();
}
UndefinedPropertyObserver.prototype.getValue = function getValue() {
// delegate this to the actual observer if possible.
if (this.actual) {
return this.actual.getValue();
}
return this.obj[this.propertyName];
};
UndefinedPropertyObserver.prototype.setValue = function setValue(newValue) {
// delegate this to the actual observer if possible.
if (this.actual) {
this.actual.setValue(newValue);
return;
}
// define the property and trigger the callbacks.
this.obj[this.propertyName] = newValue;
this.trigger(newValue, undefined);
};
UndefinedPropertyObserver.prototype.trigger = function trigger(newValue, oldValue) {
var callback;
// we only care about this event one time: when the property becomes defined.
if (this.subscription) {
this.subscription();
}
// get the actual observer.
this.getObserver();
// invoke the callbacks.
for (var _iterator = this.callbackMap.keys(), _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
Iif (_isArray) {
if (_i >= _iterator.length) break;
callback = _iterator[_i++];
} else {
_i = _iterator.next();
if (_i.done) break;
callback = _i.value;
}
callback(newValue, oldValue);
}
};
UndefinedPropertyObserver.prototype.getObserver = function getObserver() {
var callback, observerLocator;
// has the property has been defined?
if (!Object.getOwnPropertyDescriptor(this.obj, this.propertyName)) {
return;
}
// get the actual observer.
observerLocator = this.owner.observerLocator;
delete this.owner.observers[this.propertyName];
delete observerLocator.getOrCreateObserversLookup(this.obj, observerLocator)[this.propertyName];
this.actual = observerLocator.getObserver(this.obj, this.propertyName);
// attach any existing callbacks to the actual observer.
for (var _iterator2 = this.callbackMap.keys(), _isArray2 = Array.isArray(_iterator2), _i2 = 0, _iterator2 = _isArray2 ? _iterator2 : _iterator2[Symbol.iterator]();;) {
Iif (_isArray2) {
if (_i2 >= _iterator2.length) break;
callback = _iterator2[_i2++];
} else {
_i2 = _iterator2.next();
if (_i2.done) break;
callback = _i2.value;
}
this.callbackMap.set(callback, this.actual.subscribe(callback));
}
};
UndefinedPropertyObserver.prototype.subscribe = function subscribe(callback) {
var _this = this;
// attempt to get the actual observer in case the property has become
// defined since the ObserverLocator returned [this].
if (!this.actual) {
this.getObserver();
}
// if we have the actual observer, use it.
if (this.actual) {
return this.actual.subscribe(callback);
}
// start listening for the property to become defined.
Eif (!this.subscription) {
this.subscription = this.owner.subscribe(this.propertyName, this.trigger.bind(this));
}
// cache the callback.
this.callbackMap.set(callback, null);
// return the method to dispose the subscription.
return function () {
var actualDispose = _this.callbackMap.get(callback);
if (actualDispose) actualDispose();
_this.callbackMap['delete'](callback);
};
};
return UndefinedPropertyObserver;
})();
_export('UndefinedPropertyObserver', UndefinedPropertyObserver);
}
};
});
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getValue(){\n    return this.obj[this.propertyName];\n  }\n\n  setValue(newValue){\n    this.obj[this.propertyName] = newValue;\n  }\n}\n\nexport class OoObjectObserver {\n  constructor(obj, observerLocator){\n    this.obj = obj;\n    this.observerLocator = observerLocator;\n    this.observers = {};\n    this.callbacks = {};\n    this.callbackCount = 0;\n  }\n\n  subscribe(propertyName, callback){\n    if (this.callbacks[propertyName]) {\n      this.callbacks[propertyName].push(callback);\n    } else {\n      this.callbacks[propertyName] = [callback];\n      this.callbacks[propertyName].oldValue = this.obj[propertyName];\n    }\n\n    if (this.callbackCount === 0) {\n      this.handler = this.handleChanges.bind(this);\n      Object.observe(this.obj, this.handler, ['update', 'add']);\n    }\n\n    this.callbackCount++;\n\n    return this.unsubscribe.bind(this, propertyName, callback);\n  }\n\n  unsubscribe(propertyName, callback) {\n    var callbacks = this.callbacks[propertyName],\n    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changes.length; i < ii; i++){\n      change = changes[i];\n      properties[change.name] = change;\n    }\n\n    for(name in properties){\n      callbacks = this.callbacks[name];\n      if (!callbacks) {\n        continue;\n      }\n      change = properties[name];\n      newValue = change.object[name];\n      oldValue = change.oldValue;\n\n      for (i = 0, ii = callbacks.length; i < ii; i++) {\n        callbacks[i](newValue, oldValue);\n      }\n    }\n  }\n}\n\nexport class UndefinedPropertyObserver {\n  constructor(owner, obj, propertyName){\n    this.owner = owner;\n    this.obj = obj;\n    this.propertyName = propertyName;\n    this.callbackMap = new Map();\n  }\n\n  getValue(){\n    // delegate this to the actual observer if possible.\n    if (this.actual){\n      return this.actual.getValue();\n    }\n    return this.obj[this.propertyName];\n  }\n\n  setValue(newValue){\n    // delegate this to the actual observer if possible.\n    if (this.actual){\n      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