You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
73 lines
2.1 KiB
JavaScript
73 lines
2.1 KiB
JavaScript
import defaultValue from "../Core/defaultValue.js";
|
|
import defined from "../Core/defined.js";
|
|
import ConstantProperty from "./ConstantProperty.js";
|
|
|
|
function createProperty(
|
|
name,
|
|
privateName,
|
|
subscriptionName,
|
|
configurable,
|
|
createPropertyCallback
|
|
) {
|
|
return {
|
|
configurable: configurable,
|
|
get: function () {
|
|
return this[privateName];
|
|
},
|
|
set: function (value) {
|
|
var oldValue = this[privateName];
|
|
var subscription = this[subscriptionName];
|
|
if (defined(subscription)) {
|
|
subscription();
|
|
this[subscriptionName] = undefined;
|
|
}
|
|
|
|
var hasValue = value !== undefined;
|
|
if (
|
|
hasValue &&
|
|
(!defined(value) || !defined(value.getValue)) &&
|
|
defined(createPropertyCallback)
|
|
) {
|
|
value = createPropertyCallback(value);
|
|
}
|
|
|
|
if (oldValue !== value) {
|
|
this[privateName] = value;
|
|
this._definitionChanged.raiseEvent(this, name, value, oldValue);
|
|
}
|
|
|
|
if (defined(value) && defined(value.definitionChanged)) {
|
|
this[subscriptionName] = value.definitionChanged.addEventListener(
|
|
function () {
|
|
this._definitionChanged.raiseEvent(this, name, value, value);
|
|
},
|
|
this
|
|
);
|
|
}
|
|
},
|
|
};
|
|
}
|
|
|
|
function createConstantProperty(value) {
|
|
return new ConstantProperty(value);
|
|
}
|
|
|
|
/**
|
|
* Used to consistently define all DataSources graphics objects.
|
|
* This is broken into two functions because the Chrome profiler does a better
|
|
* job of optimizing lookups if it notices that the string is constant throughout the function.
|
|
* @private
|
|
*/
|
|
function createPropertyDescriptor(name, configurable, createPropertyCallback) {
|
|
//Safari 8.0.3 has a JavaScript bug that causes it to confuse two variables and treat them as the same.
|
|
//The two extra toString calls work around the issue.
|
|
return createProperty(
|
|
name,
|
|
"_" + name.toString(),
|
|
"_" + name.toString() + "Subscription",
|
|
defaultValue(configurable, false),
|
|
defaultValue(createPropertyCallback, createConstantProperty)
|
|
);
|
|
}
|
|
export default createPropertyDescriptor;
|