@lightningjs/renderer
Version:
Lightning 3 Renderer
84 lines • 2.72 kB
JavaScript
/*
* If not stated otherwise in this file or this component's LICENSE file the
* following copyright and licenses apply:
*
* Copyright 2023 Comcast Cable Communications Management, LLC.
*
* Licensed under the Apache License, Version 2.0 (the License);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import { assertTruthy } from '../../utils.js';
export class ThreadXMainAnimationController {
node;
id;
stoppedPromise = null;
/**
* If this is null, then the animation is in a finished / stopped state.
*/
stoppedResolve = null;
constructor(node, id) {
this.node = node;
this.id = id;
this.onAnimationFinished = this.onAnimationFinished.bind(this);
this.state = 'stopped';
}
state;
start() {
if (this.stoppedResolve === null) {
this.makeStoppedPromise();
this.node.on('animationFinished', this.onAnimationFinished);
}
this.state = 'running';
this.node.emit('startAnimation', { id: this.id });
return this;
}
stop() {
this.node.emit('stopAnimation', { id: this.id });
this.node.off('animationFinished', this.onAnimationFinished);
if (this.stoppedResolve !== null) {
this.stoppedResolve();
this.stoppedResolve = null;
}
this.state = 'stopped';
return this;
}
pause() {
this.node.emit('pauseAnimation', { id: this.id });
this.state = 'paused';
return this;
}
restore() {
return this;
}
waitUntilStopped() {
this.makeStoppedPromise();
const promise = this.stoppedPromise;
assertTruthy(promise);
return promise;
}
onAnimationFinished(target, { id, loop }) {
if (id === this.id) {
this.node.off('animationFinished', this.onAnimationFinished);
this.stoppedResolve?.();
this.stoppedResolve = null;
this.state = 'stopped';
}
}
makeStoppedPromise() {
if (this.stoppedResolve === null) {
this.stoppedPromise = new Promise((resolve) => {
this.stoppedResolve = resolve;
});
}
}
}
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