reanimated-color-picker
Version:
A Pure JavaScript Color Picker for React Native
233 lines (227 loc) • 7.88 kB
JavaScript
import React from 'react';
import { StyleSheet, View } from 'react-native';
import { Gesture, GestureDetector } from 'react-native-gesture-handler';
import Animated, { useAnimatedStyle, useDerivedValue, useSharedValue, withTiming } from 'react-native-reanimated';
import colorKit from '../../../colorKit/index';
import usePickerContext from '../../../AppContext';
import Thumb from '../../Thumb/Thumb';
import { clamp, ConditionalRendering, getStyle, isRtl } from '../../../utils';
export function HSLSaturationSlider({ gestures = [], style = {}, vertical = false, reverse = false, ...props }) {
const { hueValue, saturationValue, brightnessValue, onGestureChange, onGestureEnd, ...ctx } = usePickerContext();
const thumbShape = props.thumbShape ?? ctx.thumbShape,
thumbSize = props.thumbSize ?? ctx.thumbSize,
thumbColor = props.thumbColor ?? ctx.thumbColor,
boundedThumb = props.boundedThumb ?? ctx.boundedThumb,
renderThumb = props.renderThumb ?? ctx.renderThumb,
thumbStyle = props.thumbStyle ?? ctx.thumbStyle ?? {},
thumbInnerStyle = props.thumbInnerStyle ?? ctx.thumbInnerStyle ?? {},
thumbScaleAnimationValue = props.thumbScaleAnimationValue ?? ctx.thumbScaleAnimationValue,
thumbScaleAnimationDuration = props.thumbScaleAnimationDuration ?? ctx.thumbScaleAnimationDuration,
adaptSpectrum = props.adaptSpectrum ?? ctx.adaptSpectrum,
sliderThickness = props.sliderThickness ?? ctx.sliderThickness;
const borderRadius = getStyle(style, 'borderRadius') ?? 5,
getWidth = getStyle(style, 'width'),
getHeight = getStyle(style, 'height');
const width = useSharedValue(vertical ? sliderThickness : typeof getWidth === 'number' ? getWidth : 0);
const height = useSharedValue(!vertical ? sliderThickness : typeof getHeight === 'number' ? getHeight : 0);
const handleScale = useSharedValue(1);
const lastHslSaturationValue = useSharedValue(0);
// We need to keep track of the HSL saturation value because, when the luminance is 0 or 100,
// when converting to/from HSV, the previous saturation value will be lost.
const hsl = useDerivedValue(() => {
const hsvColor = {
h: hueValue.value,
s: saturationValue.value,
v: brightnessValue.value,
};
const { h, s, l } = colorKit.runOnUI().HSL(hsvColor).object(false);
if (l === 100 || l === 0)
return {
h,
s: lastHslSaturationValue.value,
l,
};
lastHslSaturationValue.value = s;
return {
h,
s,
l,
};
}, [hueValue, saturationValue, brightnessValue]);
const handleStyle = useAnimatedStyle(() => {
const length = (vertical ? height.value : width.value) - (boundedThumb ? thumbSize : 0),
percent = (hsl.value.s / 100) * length,
pos = (reverse ? length - percent : percent) - (boundedThumb ? 0 : thumbSize / 2),
posY = vertical ? pos : height.value / 2 - thumbSize / 2,
posX = vertical ? width.value / 2 - thumbSize / 2 : pos;
return {
transform: [
{
translateY: posY,
},
{
translateX: posX,
},
{
scale: handleScale.value,
},
],
};
}, [width, height, hsl, handleScale]);
const activeColorStyle = useAnimatedStyle(() => {
return {
backgroundColor: `hsl(${hsl.value.h}, 100%, 50%)`,
};
}, [hueValue]);
const activeBrightnessStyle = useAnimatedStyle(() => {
if (!adaptSpectrum) return {};
if (hsl.value.l < 50)
return {
backgroundColor: `rgba(0, 0, 0, ${1 - hsl.value.l / 50})`,
};
return {
backgroundColor: `rgba(255, 255, 255, ${(hsl.value.l - 50) / 50})`,
};
}, [adaptSpectrum, brightnessValue]);
const imageStyle = useAnimatedStyle(() => {
const imageRotate = vertical ? (reverse ? '270deg' : '90deg') : reverse ? '180deg' : '0deg';
const imageTranslateY = ((height.value - width.value) / 2) * ((reverse && isRtl) || (!reverse && !isRtl) ? 1 : -1);
return {
width: vertical ? height.value : '100%',
height: vertical ? width.value : '100%',
tintColor: '#888',
transform: [
{
rotate: imageRotate,
},
{
translateX: vertical ? ((height.value - width.value) / 2) * (reverse ? -1 : 1) : 0,
},
{
translateY: vertical ? imageTranslateY : 0,
},
],
};
}, [width, height]);
const onGestureUpdate = ({ x, y }) => {
'worklet';
const length = (vertical ? height.value : width.value) - (boundedThumb ? thumbSize : 0),
pos = clamp((vertical ? y : x) - (boundedThumb ? thumbSize / 2 : 0), length),
value = (pos / length) * 100,
newSaturationValue = reverse ? 100 - value : value;
if (newSaturationValue === hsl.value.s) return;
// To prevent locking this slider when the luminance is 0 or 100,
// this should not affect the resulting color, as the value will be rounded.
const l = hsl.value.l === 0 ? 0.01 : hsl.value.l === 100 ? 99.99 : hsl.value.l;
const { s, v } = colorKit
.runOnUI()
.HSV({
h: hsl.value.h,
s: newSaturationValue,
l,
})
.object(false);
saturationValue.value = s;
brightnessValue.value = v;
onGestureChange();
};
const onGestureBegin = event => {
'worklet';
handleScale.value = withTiming(thumbScaleAnimationValue, {
duration: thumbScaleAnimationDuration,
});
onGestureUpdate(event);
};
const onGestureFinish = () => {
'worklet';
handleScale.value = withTiming(1, {
duration: thumbScaleAnimationDuration,
});
onGestureEnd();
};
const pan = Gesture.Pan().onBegin(onGestureBegin).onUpdate(onGestureUpdate).onEnd(onGestureFinish);
const tap = Gesture.Tap().onEnd(onGestureFinish);
const longPress = Gesture.LongPress().onEnd(onGestureFinish);
const composed = Gesture.Simultaneous(Gesture.Exclusive(pan, tap, longPress), ...gestures);
const onLayout = ({ nativeEvent: { layout } }) => {
if (!vertical)
width.value = withTiming(layout.width, {
duration: 5,
});
if (vertical)
height.value = withTiming(layout.height, {
duration: 5,
});
};
const thicknessStyle = vertical
? {
width: sliderThickness,
}
: {
height: sliderThickness,
};
return /*#__PURE__*/ React.createElement(
GestureDetector,
{
gesture: composed,
},
/*#__PURE__*/ React.createElement(
Animated.View,
{
onLayout: onLayout,
style: [
style,
{
position: 'relative',
borderRadius,
borderWidth: 0,
padding: 0,
},
thicknessStyle,
activeColorStyle,
],
},
/*#__PURE__*/ React.createElement(
View,
{
style: {
flex: 1,
borderRadius,
overflow: 'hidden',
},
},
/*#__PURE__*/ React.createElement(Animated.Image, {
source: require('../../../assets/blackGradient.png'),
style: imageStyle,
}),
),
/*#__PURE__*/ React.createElement(
ConditionalRendering,
{
if: adaptSpectrum,
},
/*#__PURE__*/ React.createElement(Animated.View, {
style: [
{
borderRadius,
},
activeBrightnessStyle,
StyleSheet.absoluteFillObject,
],
}),
),
/*#__PURE__*/ React.createElement(Thumb, {
channel: 's',
thumbShape: thumbShape,
thumbSize: thumbSize,
thumbColor: thumbColor,
renderThumb: renderThumb,
innerStyle: thumbInnerStyle,
handleStyle: handleStyle,
style: thumbStyle,
adaptSpectrum: adaptSpectrum,
vertical: vertical,
}),
),
);
}