mirror of
https://github.com/status-im/react-native.git
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40bcc38d91
Summary: RN animations currently ignore the `Slow Animations` option on the iOS simulator because we don't use UIKit animations directly. This uses a private api to get the slow coefficient and use it in the native animated driver. We only compile the private api code on simulator so this won't cause issues for app store approval. One possible issue is that the api changes in new iOS versions but I think it's reasonable to do this. Note that this won't work with JS driven animations, we could expose the slow coefficient as a constant and use that in JS but I decided not to implement it. Pull Request resolved: https://github.com/facebook/react-native/pull/21157 Differential Revision: D9980306 Pulled By: sahrens fbshipit-source-id: bdbce2e469261a75cb4b9a251e8e8f212bb9c4e7
110 lines
3.3 KiB
Objective-C
110 lines
3.3 KiB
Objective-C
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import "RCTAnimationUtils.h"
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#import <React/RCTLog.h>
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static NSUInteger _RCTFindIndexOfNearestValue(CGFloat value, NSArray<NSNumber *> *range)
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{
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NSUInteger index;
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NSUInteger rangeCount = range.count;
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for (index = 1; index < rangeCount - 1; index++) {
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NSNumber *inputValue = range[index];
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if (inputValue.doubleValue >= value) {
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break;
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}
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}
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return index - 1;
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}
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/**
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* Interpolates value by remapping it linearly fromMin->fromMax to toMin->toMax
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*/
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CGFloat RCTInterpolateValue(CGFloat value,
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CGFloat inputMin,
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CGFloat inputMax,
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CGFloat outputMin,
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CGFloat outputMax,
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NSString *extrapolateLeft,
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NSString *extrapolateRight)
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{
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if (value < inputMin) {
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if ([extrapolateLeft isEqualToString:EXTRAPOLATE_TYPE_IDENTITY]) {
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return value;
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} else if ([extrapolateLeft isEqualToString:EXTRAPOLATE_TYPE_CLAMP]) {
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value = inputMin;
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} else if ([extrapolateLeft isEqualToString:EXTRAPOLATE_TYPE_EXTEND]) {
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// noop
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} else {
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RCTLogError(@"Invalid extrapolation type %@ for left extrapolation", extrapolateLeft);
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}
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}
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if (value > inputMax) {
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if ([extrapolateRight isEqualToString:EXTRAPOLATE_TYPE_IDENTITY]) {
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return value;
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} else if ([extrapolateRight isEqualToString:EXTRAPOLATE_TYPE_CLAMP]) {
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value = inputMax;
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} else if ([extrapolateRight isEqualToString:EXTRAPOLATE_TYPE_EXTEND]) {
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// noop
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} else {
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RCTLogError(@"Invalid extrapolation type %@ for right extrapolation", extrapolateRight);
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}
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}
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return outputMin + (value - inputMin) * (outputMax - outputMin) / (inputMax - inputMin);
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}
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/**
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* Interpolates value by mapping it from the inputRange to the outputRange.
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*/
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CGFloat RCTInterpolateValueInRange(CGFloat value,
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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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NSUInteger rangeIndex = _RCTFindIndexOfNearestValue(value, inputRange);
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CGFloat inputMin = inputRange[rangeIndex].doubleValue;
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CGFloat inputMax = inputRange[rangeIndex + 1].doubleValue;
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CGFloat outputMin = outputRange[rangeIndex].doubleValue;
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CGFloat outputMax = outputRange[rangeIndex + 1].doubleValue;
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return RCTInterpolateValue(value,
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inputMin,
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inputMax,
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outputMin,
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outputMax,
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extrapolateLeft,
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extrapolateRight);
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}
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CGFloat RCTRadiansToDegrees(CGFloat radians)
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{
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return radians * 180.0 / M_PI;
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}
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CGFloat RCTDegreesToRadians(CGFloat degrees)
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{
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return degrees / 180.0 * M_PI;
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}
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#if TARGET_IPHONE_SIMULATOR
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// Based on https://stackoverflow.com/a/13307674
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float UIAnimationDragCoefficient(void);
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#endif
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CGFloat RCTAnimationDragCoefficient()
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{
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#if TARGET_IPHONE_SIMULATOR
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return (CGFloat)UIAnimationDragCoefficient();
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#else
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return 1.0;
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#endif
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}
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