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Optionally create NativeAnimated value with native flag #10657

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Optionally create NativeAnimated value with native flag #10657

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29 changes: 25 additions & 4 deletions Libraries/Animated/src/AnimatedImplementation.js
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Original file line number Diff line number Diff line change
Expand Up @@ -34,7 +34,10 @@ var NativeAnimatedAPI = NativeAnimatedHelper.API;

var warnedMissingNativeAnimated = false;

function shouldUseNativeDriver(config: AnimationConfig | EventConfig): boolean {
function shouldUseNativeDriver(config?: AnimationConfig | EventConfig | AnimatedValueConfig): boolean {
if (!config) {
return false;
}
if (config.useNativeDriver &&
!NativeAnimatedHelper.isNativeAnimatedAvailable()) {
if (!warnedMissingNativeAnimated) {
Expand All @@ -48,7 +51,6 @@ function shouldUseNativeDriver(config: AnimationConfig | EventConfig): boolean {
}
return false;
}

return config.useNativeDriver || false;
}

Expand Down Expand Up @@ -682,6 +684,10 @@ class SpringAnimation extends Animation {
}
}

type AnimatedValueConfig = {
useNativeDriver?: bool;
};

type ValueListenerCallback = (state: {value: number}) => void;

var _uniqueId = 1;
Expand All @@ -700,12 +706,15 @@ class AnimatedValue extends AnimatedWithChildren {
_listeners: {[key: string]: ValueListenerCallback};
__nativeAnimatedValueListener: ?any;

constructor(value: number) {
constructor(value: number, config?: AnimatedValueConfig) {
super();
this._value = value;
this._offset = 0;
this._animation = null;
this._listeners = {};
if (shouldUseNativeDriver(config)) {
this.__makeNative();
}
}

__detach() {
Expand Down Expand Up @@ -964,7 +973,7 @@ class AnimatedValueXY extends AnimatedWithChildren {
y: AnimatedValue;
_listeners: {[key: string]: {x: string, y: string}};

constructor(valueIn?: ?{x: number | AnimatedValue, y: number | AnimatedValue}) {
constructor(valueIn?: ?{x: number | AnimatedValue, y: number | AnimatedValue}, config?: AnimatedValueConfig) {
super();
var value: any = valueIn || {x: 0, y: 0}; // @flowfixme: shouldn't need `: any`
if (typeof value.x === 'number' && typeof value.y === 'number') {
Expand All @@ -981,6 +990,9 @@ class AnimatedValueXY extends AnimatedWithChildren {
this.y = value.y;
}
this._listeners = {};
if (shouldUseNativeDriver(config)) {
this.__makeNative();
}
}

setValue(value: {x: number, y: number}) {
Expand Down Expand Up @@ -1955,6 +1967,9 @@ var spring = function(
value: AnimatedValue | AnimatedValueXY,
config: SpringAnimationConfig,
): CompositeAnimation {
if (value.__isNative) {
config.useNativeDriver = true;
}
return maybeVectorAnim(value, config, spring) || {
start: function(callback?: ?EndCallback): void {
callback = _combineCallbacks(callback, config);
Expand Down Expand Up @@ -1984,6 +1999,9 @@ var timing = function(
value: AnimatedValue | AnimatedValueXY,
config: TimingAnimationConfig,
): CompositeAnimation {
if (value.__isNative) {
config.useNativeDriver = true;
}
return maybeVectorAnim(value, config, timing) || {
start: function(callback?: ?EndCallback): void {
callback = _combineCallbacks(callback, config);
Expand Down Expand Up @@ -2013,6 +2031,9 @@ var decay = function(
value: AnimatedValue | AnimatedValueXY,
config: DecayAnimationConfig,
): CompositeAnimation {
if (value.__isNative) {
config.useNativeDriver = true;
}
return maybeVectorAnim(value, config, decay) || {
start: function(callback?: ?EndCallback): void {
callback = _combineCallbacks(callback, config);
Expand Down