87 строки
2.4 KiB
JavaScript
87 строки
2.4 KiB
JavaScript
/**
|
|
* Copyright (c) Facebook, Inc. and its affiliates.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*
|
|
* @flow
|
|
* @format
|
|
*/
|
|
|
|
'use strict';
|
|
|
|
const NativeAnimatedHelper = require('../NativeAnimatedHelper');
|
|
|
|
import type AnimatedValue from '../nodes/AnimatedValue';
|
|
|
|
export type EndResult = {finished: boolean, ...};
|
|
export type EndCallback = (result: EndResult) => void;
|
|
|
|
export type AnimationConfig = {
|
|
isInteraction?: boolean,
|
|
useNativeDriver: boolean,
|
|
onComplete?: ?EndCallback,
|
|
iterations?: number,
|
|
};
|
|
|
|
let startNativeAnimationNextId = 1;
|
|
|
|
// Important note: start() and stop() will only be called at most once.
|
|
// Once an animation has been stopped or finished its course, it will
|
|
// not be reused.
|
|
class Animation {
|
|
__active: boolean;
|
|
__isInteraction: boolean;
|
|
__nativeId: number;
|
|
__onEnd: ?EndCallback;
|
|
__iterations: number;
|
|
start(
|
|
fromValue: number,
|
|
onUpdate: (value: number) => void,
|
|
onEnd: ?EndCallback,
|
|
previousAnimation: ?Animation,
|
|
animatedValue: AnimatedValue,
|
|
): void {}
|
|
stop(): void {
|
|
if (this.__nativeId) {
|
|
NativeAnimatedHelper.API.stopAnimation(this.__nativeId);
|
|
}
|
|
}
|
|
__getNativeAnimationConfig(): any {
|
|
// Subclasses that have corresponding animation implementation done in native
|
|
// should override this method
|
|
throw new Error('This animation type cannot be offloaded to native');
|
|
}
|
|
// Helper function for subclasses to make sure onEnd is only called once.
|
|
__debouncedOnEnd(result: EndResult): void {
|
|
const onEnd = this.__onEnd;
|
|
this.__onEnd = null;
|
|
onEnd && onEnd(result);
|
|
}
|
|
__startNativeAnimation(animatedValue: AnimatedValue): void {
|
|
const startNativeAnimationWaitId = `${startNativeAnimationNextId}:startAnimation`;
|
|
startNativeAnimationNextId += 1;
|
|
NativeAnimatedHelper.API.setWaitingForIdentifier(
|
|
startNativeAnimationWaitId,
|
|
);
|
|
try {
|
|
animatedValue.__makeNative();
|
|
this.__nativeId = NativeAnimatedHelper.generateNewAnimationId();
|
|
NativeAnimatedHelper.API.startAnimatingNode(
|
|
this.__nativeId,
|
|
animatedValue.__getNativeTag(),
|
|
this.__getNativeAnimationConfig(),
|
|
this.__debouncedOnEnd.bind(this),
|
|
);
|
|
} catch (e) {
|
|
throw e;
|
|
} finally {
|
|
NativeAnimatedHelper.API.unsetWaitingForIdentifier(
|
|
startNativeAnimationWaitId,
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
module.exports = Animation;
|