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Summary: Add native support on iOS and Android for `Animated.diffClamp` that was added in facebook#9419. **Test plan** Tested that it works properly using the native animations UIExplorer example. Closes facebook#9691 Differential Revision: D3813440 fbshipit-source-id: 48a3ecddf3708fa44b408954d3d8133ec8537f21
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14 changes: 14 additions & 0 deletions
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Libraries/NativeAnimation/Nodes/RCTDiffClampAnimatedNode.h
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| /** | ||
| * Copyright (c) 2015-present, Facebook, Inc. | ||
| * All rights reserved. | ||
| * | ||
| * This source code is licensed under the BSD-style license found in the | ||
| * LICENSE file in the root directory of this source tree. An additional grant | ||
| * of patent rights can be found in the PATENTS file in the same directory. | ||
| */ | ||
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| #import "RCTValueAnimatedNode.h" | ||
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| @interface RCTDiffClampAnimatedNode : RCTValueAnimatedNode | ||
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| @end |
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Libraries/NativeAnimation/Nodes/RCTDiffClampAnimatedNode.m
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| /** | ||
| * Copyright (c) 2015-present, Facebook, Inc. | ||
| * All rights reserved. | ||
| * | ||
| * This source code is licensed under the BSD-style license found in the | ||
| * LICENSE file in the root directory of this source tree. An additional grant | ||
| * of patent rights can be found in the PATENTS file in the same directory. | ||
| */ | ||
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| #import "RCTDiffClampAnimatedNode.h" | ||
| #import "RCTLog.h" | ||
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| @implementation RCTDiffClampAnimatedNode | ||
| { | ||
| NSNumber *_inputNodeTag; | ||
| CGFloat _min; | ||
| CGFloat _max; | ||
| CGFloat _lastValue; | ||
| } | ||
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| - (instancetype)initWithTag:(NSNumber *)tag | ||
| config:(NSDictionary<NSString *, id> *)config | ||
| { | ||
| if (self = [super initWithTag:tag config:config]) { | ||
| _inputNodeTag = config[@"input"]; | ||
| _min = [config[@"min"] floatValue]; | ||
| _max = [config[@"max"] floatValue]; | ||
| } | ||
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| return self; | ||
| } | ||
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| - (void)onAttachedToNode:(RCTAnimatedNode *)parent | ||
| { | ||
| [super onAttachedToNode:parent]; | ||
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| self.value = _lastValue = [self inputNodeValue]; | ||
| } | ||
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| - (void)performUpdate | ||
| { | ||
| [super performUpdate]; | ||
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| CGFloat value = [self inputNodeValue]; | ||
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| CGFloat diff = value - _lastValue; | ||
| _lastValue = value; | ||
| self.value = MIN(MAX(self.value + diff, _min), _max); | ||
| } | ||
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| - (CGFloat)inputNodeValue | ||
| { | ||
| RCTValueAnimatedNode *inputNode = (RCTValueAnimatedNode *)self.parentNodes[_inputNodeTag]; | ||
| if (![inputNode isKindOfClass:[RCTValueAnimatedNode class]]) { | ||
| RCTLogError(@"Illegal node ID set as an input for Animated.DiffClamp node"); | ||
| return 0; | ||
| } | ||
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| return inputNode.value; | ||
| } | ||
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| @end |
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53 changes: 53 additions & 0 deletions
53
ReactAndroid/src/main/java/com/facebook/react/animated/DiffClampAnimatedNode.java
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| /** | ||
| * Copyright (c) 2015-present, Facebook, Inc. | ||
| * All rights reserved. | ||
| * | ||
| * This source code is licensed under the BSD-style license found in the | ||
| * LICENSE file in the root directory of this source tree. An additional grant | ||
| * of patent rights can be found in the PATENTS file in the same directory. | ||
| */ | ||
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| package com.facebook.react.animated; | ||
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| import com.facebook.react.bridge.JSApplicationCausedNativeException; | ||
| import com.facebook.react.bridge.ReadableMap; | ||
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| /*package*/ class DiffClampAnimatedNode extends ValueAnimatedNode { | ||
| private final NativeAnimatedNodesManager mNativeAnimatedNodesManager; | ||
| private final int mInputNodeTag; | ||
| private final double mMin; | ||
| private final double mMax; | ||
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| private double mLastValue; | ||
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| public DiffClampAnimatedNode( | ||
| ReadableMap config, | ||
| NativeAnimatedNodesManager nativeAnimatedNodesManager) { | ||
| mNativeAnimatedNodesManager = nativeAnimatedNodesManager; | ||
| mInputNodeTag = config.getInt("input"); | ||
| mMin = config.getDouble("min"); | ||
| mMax = config.getDouble("max"); | ||
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| mValue = mLastValue = getInputNodeValue(); | ||
| } | ||
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| @Override | ||
| public void update() { | ||
| double value = getInputNodeValue(); | ||
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| double diff = value - mLastValue; | ||
| mLastValue = value; | ||
| mValue = Math.min(Math.max(mValue + diff, mMin), mMax); | ||
| } | ||
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| private double getInputNodeValue() { | ||
| AnimatedNode animatedNode = mNativeAnimatedNodesManager.getNodeById(mInputNodeTag); | ||
| if (animatedNode == null || !(animatedNode instanceof ValueAnimatedNode)) { | ||
| throw new JSApplicationCausedNativeException("Illegal node ID set as an input for " + | ||
| "Animated.DiffClamp node"); | ||
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| } | ||
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| return ((ValueAnimatedNode) animatedNode).mValue; | ||
| } | ||
| } |
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