playcanvas
Version:
Open-source WebGL/WebGPU 3D engine for the web
73 lines (72 loc) • 1.65 kB
JavaScript
import { EventHandler } from "../../core/event-handler.js";
class Component extends EventHandler {
static order = 0;
system;
entity;
_enabled = true;
constructor(system, entity) {
super();
this.system = system;
this.entity = entity;
if (this.system.schema?.length && !this._accessorsBuilt) {
this.buildAccessors(this.system.schema);
}
this.on("set", function(name, oldValue, newValue) {
this.fire(`set_${name}`, name, oldValue, newValue);
});
this.on("set_enabled", this.onSetEnabled, this);
}
static _buildAccessors(obj, schema) {
schema.forEach((descriptor) => {
const name = typeof descriptor === "object" ? descriptor.name : descriptor;
Object.defineProperty(obj, name, {
get: function() {
return this.data[name];
},
set: function(value) {
const data = this.data;
const oldValue = data[name];
data[name] = value;
this.fire("set", name, oldValue, value);
},
configurable: true
});
});
obj._accessorsBuilt = true;
}
buildAccessors(schema) {
Component._buildAccessors(this, schema);
}
onSetEnabled(name, oldValue, newValue) {
if (oldValue !== newValue) {
if (this.entity.enabled) {
if (newValue) {
this.onEnable();
} else {
this.onDisable();
}
}
}
}
onEnable() {
}
onDisable() {
}
onPostStateChange() {
}
get data() {
const record = this.system.store[this.entity.guid];
return record ? record.data : null;
}
set enabled(value) {
const oldValue = this._enabled;
this._enabled = value;
this.fire("set", "enabled", oldValue, value);
}
get enabled() {
return this._enabled;
}
}
export {
Component
};