import defaultValue from "../Core/defaultValue.js";
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import defined from "../Core/defined.js";
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import ConstantProperty from "./ConstantProperty.js";
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function createProperty(
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name,
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privateName,
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subscriptionName,
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configurable,
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createPropertyCallback
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) {
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return {
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configurable: configurable,
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get: function () {
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return this[privateName];
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},
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set: function (value) {
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var oldValue = this[privateName];
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var subscription = this[subscriptionName];
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if (defined(subscription)) {
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subscription();
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this[subscriptionName] = undefined;
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}
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var hasValue = value !== undefined;
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if (
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hasValue &&
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(!defined(value) || !defined(value.getValue)) &&
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defined(createPropertyCallback)
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) {
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value = createPropertyCallback(value);
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}
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if (oldValue !== value) {
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this[privateName] = value;
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this._definitionChanged.raiseEvent(this, name, value, oldValue);
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}
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if (defined(value) && defined(value.definitionChanged)) {
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this[subscriptionName] = value.definitionChanged.addEventListener(
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function () {
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this._definitionChanged.raiseEvent(this, name, value, value);
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},
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this
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);
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}
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},
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};
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}
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function createConstantProperty(value) {
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return new ConstantProperty(value);
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}
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/**
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* Used to consistently define all DataSources graphics objects.
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* This is broken into two functions because the Chrome profiler does a better
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* job of optimizing lookups if it notices that the string is constant throughout the function.
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* @private
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*/
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function createPropertyDescriptor(name, configurable, createPropertyCallback) {
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//Safari 8.0.3 has a JavaScript bug that causes it to confuse two variables and treat them as the same.
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//The two extra toString calls work around the issue.
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return createProperty(
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name,
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"_" + name.toString(),
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"_" + name.toString() + "Subscription",
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defaultValue(configurable, false),
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defaultValue(createPropertyCallback, createConstantProperty)
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);
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}
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export default createPropertyDescriptor;
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