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| System.register(['core-js', './util', 'aurelia-binding'], function (_export) {
'use strict';
var core, hyphenate, bindingMode, BindableProperty, BehaviorPropertyObserver;
function _classCallCheck(instance, Constructor) { Iif (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }
function getObserver(behavior, instance, name) {
var lookup = instance.__observers__;
if (lookup === undefined) {
lookup = behavior.observerLocator.getOrCreateObserversLookup(instance);
behavior.ensurePropertiesDefined(instance, lookup);
}
return lookup[name];
}
return {
setters: [function (_coreJs) {
core = _coreJs['default'];
}, function (_util) {
hyphenate = _util.hyphenate;
}, function (_aureliaBinding) {
bindingMode = _aureliaBinding.bindingMode;
}],
execute: function () {
BindableProperty = (function () {
function BindableProperty(nameOrConfig) {
_classCallCheck(this, BindableProperty);
Iif (typeof nameOrConfig === 'string') {
this.name = nameOrConfig;
} else {
Object.assign(this, nameOrConfig);
}
this.attribute = this.attribute || hyphenate(this.name);
this.defaultBindingMode = this.defaultBindingMode || bindingMode.oneWay;
this.changeHandler = this.changeHandler || null;
this.owner = null;
}
BindableProperty.prototype.registerWith = function registerWith(target, behavior, descriptor) {
behavior.properties.push(this);
behavior.attributes[this.attribute] = this;
this.owner = behavior;
Iif (descriptor) {
this.descriptor = descriptor;
return this.configureDescriptor(behavior, descriptor);
}
};
BindableProperty.prototype.configureDescriptor = function configureDescriptor(behavior, descriptor) {
var name = this.name;
descriptor.configurable = true;
descriptor.enumerable = true;
Iif ('initializer' in descriptor) {
this.defaultValue = descriptor.initializer;
delete descriptor.initializer;
delete descriptor.writable;
}
Iif ('value' in descriptor) {
this.defaultValue = descriptor.value;
delete descriptor.value;
delete descriptor.writable;
}
descriptor.get = function () {
return getObserver(behavior, this, name).getValue();
};
descriptor.set = function (value) {
getObserver(behavior, this, name).setValue(value);
};
descriptor.get.getObserver = function (obj) {
return getObserver(behavior, obj, name);
};
return descriptor;
};
BindableProperty.prototype.defineOn = function defineOn(target, behavior) {
var name = this.name,
handlerName;
Eif (this.changeHandler === null) {
handlerName = name + 'Changed';
Iif (handlerName in target.prototype) {
this.changeHandler = handlerName;
}
}
Eif (!this.descriptor) {
Object.defineProperty(target.prototype, name, this.configureDescriptor(behavior, {}));
}
};
BindableProperty.prototype.createObserver = function createObserver(executionContext) {
var _this = this;
var selfSubscriber = null,
defaultValue = this.defaultValue,
initialValue;
if (this.hasOptions) {
return;
}
if (this.changeHandler !== null) {
selfSubscriber = function (newValue, oldValue) {
return executionContext[_this.changeHandler](newValue, oldValue);
};
}
if (defaultValue !== undefined) {
initialValue = typeof defaultValue === 'function' ? defaultValue.call(executionContext) : defaultValue;
}
return new BehaviorPropertyObserver(this.owner.taskQueue, executionContext, this.name, selfSubscriber, initialValue);
};
BindableProperty.prototype.initialize = function initialize(executionContext, observerLookup, attributes, behaviorHandlesBind, boundProperties) {
var selfSubscriber,
observer,
attribute,
defaultValue = this.defaultValue;
if (this.isDynamic) {
for (var key in attributes) {
this.createDynamicProperty(executionContext, observerLookup, behaviorHandlesBind, key, attributes[key], boundProperties);
}
} else if (!this.hasOptions) {
observer = observerLookup[this.name];
if (attributes !== undefined) {
selfSubscriber = observer.selfSubscriber;
attribute = attributes[this.attribute];
if (behaviorHandlesBind) {
observer.selfSubscriber = null;
}
if (typeof attribute === 'string') {
executionContext[this.name] = attribute;
observer.call();
} else if (attribute) {
boundProperties.push({ observer: observer, binding: attribute.createBinding(executionContext) });
} else if (defaultValue !== undefined) {
observer.call();
}
observer.selfSubscriber = selfSubscriber;
}
observer.publishing = true;
}
};
BindableProperty.prototype.createDynamicProperty = function createDynamicProperty(executionContext, observerLookup, behaviorHandlesBind, name, attribute, boundProperties) {
var changeHandlerName = name + 'Changed',
selfSubscriber = null,
observer,
info;
if (changeHandlerName in executionContext) {
selfSubscriber = function (newValue, oldValue) {
return executionContext[changeHandlerName](newValue, oldValue);
};
} else if ('dynamicPropertyChanged' in executionContext) {
selfSubscriber = function (newValue, oldValue) {
return executionContext['dynamicPropertyChanged'](name, newValue, oldValue);
};
}
observer = observerLookup[name] = new BehaviorPropertyObserver(this.owner.taskQueue, executionContext, name, selfSubscriber);
Object.defineProperty(executionContext, name, {
configurable: true,
enumerable: true,
get: observer.getValue.bind(observer),
set: observer.setValue.bind(observer)
});
if (behaviorHandlesBind) {
observer.selfSubscriber = null;
}
if (typeof attribute === 'string') {
executionContext[name] = attribute;
observer.call();
} else if (attribute) {
info = { observer: observer, binding: attribute.createBinding(executionContext) };
boundProperties.push(info);
}
observer.publishing = true;
observer.selfSubscriber = selfSubscriber;
};
return BindableProperty;
})();
_export('BindableProperty', BindableProperty);
BehaviorPropertyObserver = (function () {
function BehaviorPropertyObserver(taskQueue, obj, propertyName, selfSubscriber, initialValue) {
_classCallCheck(this, BehaviorPropertyObserver);
this.taskQueue = taskQueue;
this.obj = obj;
this.propertyName = propertyName;
this.callbacks = [];
this.notqueued = true;
this.publishing = false;
this.selfSubscriber = selfSubscriber;
this.currentValue = this.oldValue = initialValue;
}
BehaviorPropertyObserver.prototype.getValue = function getValue() {
return this.currentValue;
};
BehaviorPropertyObserver.prototype.setValue = function setValue(newValue) {
var oldValue = this.currentValue;
if (oldValue != newValue) {
if (this.publishing && this.notqueued) {
this.notqueued = false;
this.taskQueue.queueMicroTask(this);
}
this.oldValue = oldValue;
this.currentValue = newValue;
}
};
BehaviorPropertyObserver.prototype.call = function call() {
var callbacks = this.callbacks,
i = callbacks.length,
oldValue = this.oldValue,
newValue = this.currentValue;
this.notqueued = true;
if (newValue != oldValue) {
if (this.selfSubscriber !== null) {
this.selfSubscriber(newValue, oldValue);
}
while (i--) {
callbacks[i](newValue, oldValue);
}
this.oldValue = newValue;
}
};
BehaviorPropertyObserver.prototype.subscribe = function subscribe(callback) {
var callbacks = this.callbacks;
callbacks.push(callback);
return function () {
callbacks.splice(callbacks.indexOf(callback), 1);
};
};
return BehaviorPropertyObserver;
})();
}
};
});
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