74 lines
1.9 KiB
Objective-C
74 lines
1.9 KiB
Objective-C
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import "RCTInterpolationAnimatedNode.h"
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#import "RCTAnimationUtils.h"
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@implementation RCTInterpolationAnimatedNode
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{
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__weak RCTValueAnimatedNode *_parentNode;
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NSArray<NSNumber *> *_inputRange;
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NSArray<NSNumber *> *_outputRange;
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NSString *_extrapolateLeft;
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NSString *_extrapolateRight;
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}
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- (instancetype)initWithTag:(NSNumber *)tag
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config:(NSDictionary<NSString *, id> *)config
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{
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if ((self = [super initWithTag:tag config:config])) {
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_inputRange = [config[@"inputRange"] copy];
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NSMutableArray *outputRange = [NSMutableArray array];
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for (id value in config[@"outputRange"]) {
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if ([value isKindOfClass:[NSNumber class]]) {
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[outputRange addObject:value];
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}
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}
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_outputRange = [outputRange copy];
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_extrapolateLeft = config[@"extrapolateLeft"];
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_extrapolateRight = config[@"extrapolateRight"];
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}
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return self;
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}
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- (void)onAttachedToNode:(RCTAnimatedNode *)parent
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{
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[super onAttachedToNode:parent];
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if ([parent isKindOfClass:[RCTValueAnimatedNode class]]) {
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_parentNode = (RCTValueAnimatedNode *)parent;
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}
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}
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- (void)onDetachedFromNode:(RCTAnimatedNode *)parent
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{
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[super onDetachedFromNode:parent];
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if (_parentNode == parent) {
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_parentNode = nil;
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}
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}
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- (void)performUpdate
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{
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[super performUpdate];
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if (!_parentNode) {
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return;
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}
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CGFloat inputValue = _parentNode.value;
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self.value = RCTInterpolateValueInRange(inputValue,
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_inputRange,
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_outputRange,
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_extrapolateLeft,
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_extrapolateRight);
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}
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@end
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