react-native-zoom-toolkit
Version:
Most complete set of pinch to zoom utilites for React Native
296 lines (294 loc) • 9.54 kB
JavaScript
import React, { useImperativeHandle } from 'react';
import { StyleSheet, View } from 'react-native';
import Animated, { useAnimatedStyle, useDerivedValue, useSharedValue, withTiming } from 'react-native-reanimated';
import { Gesture, GestureDetector } from 'react-native-gesture-handler';
import { clamp } from '../../commons/utils/clamp';
import { useVector } from '../../commons/hooks/useVector';
import { getMaxScale } from '../../commons/utils/getMaxScale';
import { useSizeVector } from '../../commons/hooks/useSizeVector';
import { usePanCommons } from '../../commons/hooks/usePanCommons';
import { usePinchCommons } from '../../commons/hooks/usePinchCommons';
import { useDoubleTapCommons } from '../../commons/hooks/useDoubleTapCommons';
import { getVisibleRect as getRect } from '../../commons/utils/getVisibleRect';
import withResumableValidation from '../../commons/hoc/withResumableValidation';
const ResumableZoom = props => {
const {
reference,
children,
style,
extendGestures = false,
decay = true,
tapsEnabled = true,
panEnabled = true,
pinchEnabled = true,
minScale = 1,
maxScale: userMaxScale = 6,
panMode = 'clamp',
scaleMode = 'bounce',
pinchMode = 'clamp',
allowPinchPanning = true,
longPressDuration = 500,
onTap,
onLongPress,
onUpdate,
onGestureEnd,
onSwipe,
onPinchStart: onUserPinchStart,
onPinchEnd: onUserPinchEnd,
onPanStart: onUserPanStart,
onPanEnd: onUserPanEnd,
onOverPanning
} = props;
const rootSize = useSizeVector(1, 1);
const childSize = useSizeVector(1, 1);
const extendedSize = useSizeVector(1, 1);
const translate = useVector(0, 0);
const offset = useVector(0, 0);
const scale = useSharedValue(minScale);
const scaleOffset = useSharedValue(minScale);
const maxScale = useDerivedValue(() => {
if (typeof userMaxScale === 'object') {
return getMaxScale({
width: childSize.width.value,
height: childSize.height.value
}, userMaxScale);
}
return userMaxScale;
}, [userMaxScale, childSize]);
useDerivedValue(() => {
extendedSize.width.value = extendGestures ? Math.max(rootSize.width.value, childSize.width.value) : childSize.width.value;
extendedSize.height.value = extendGestures ? Math.max(rootSize.height.value, childSize.height.value) : childSize.height.value;
}, [extendGestures, rootSize, childSize]);
const boundsFn = optionalScale => {
'worklet';
const actualScale = optionalScale ?? scale.value;
const {
width: cWidth,
height: cHeight
} = childSize;
const {
width: rWidth,
height: rHeight
} = rootSize;
const boundX = Math.max(0, cWidth.value * actualScale - rWidth.value) / 2;
const boundY = Math.max(0, cHeight.value * actualScale - rHeight.value) / 2;
return {
x: boundX,
y: boundY
};
};
const set = (toX, toY, toScale, animate) => {
'worklet';
translate.x.value = animate ? withTiming(toX) : toX;
translate.y.value = animate ? withTiming(toY) : toY;
scale.value = animate ? withTiming(toScale) : toScale;
scaleOffset.value = toScale;
};
useDerivedValue(() => {
onUpdate === null || onUpdate === void 0 || onUpdate({
containerSize: {
width: rootSize.width.value,
height: rootSize.height.value
},
childSize: {
width: childSize.width.value,
height: childSize.height.value
},
maxScale: maxScale.value,
translateX: translate.x.value,
translateY: translate.y.value,
scale: scale.value
});
}, [rootSize, childSize, translate, maxScale, scale]);
const {
gesturesEnabled,
onTouchesDown,
onTouchesMove,
onTouchesUp,
onPinchStart,
onPinchUpdate,
onPinchEnd
} = usePinchCommons({
container: extendedSize,
translate,
offset,
scale,
scaleOffset,
minScale,
maxScale,
allowPinchPanning,
scaleMode,
pinchMode,
boundFn: boundsFn,
userCallbacks: {
onGestureEnd,
onPinchStart: onUserPinchStart,
onPinchEnd: onUserPinchEnd
}
});
const {
onPanStart,
onPanChange,
onPanEnd
} = usePanCommons({
container: extendedSize,
translate,
offset,
panMode,
boundFn: boundsFn,
decay,
userCallbacks: {
onSwipe,
onGestureEnd,
onPanStart: onUserPanStart,
onPanEnd: onUserPanEnd,
onOverPanning
}
});
const {
onDoubleTapEnd
} = useDoubleTapCommons({
container: extendedSize,
translate,
scale,
minScale,
maxScale,
scaleOffset,
boundsFn: boundsFn,
onGestureEnd
});
const pinch = Gesture.Pinch().withTestId('pinch').enabled(pinchEnabled).manualActivation(true).onTouchesDown(onTouchesDown).onTouchesMove(onTouchesMove).onTouchesUp(onTouchesUp).onStart(onPinchStart).onUpdate(onPinchUpdate).onEnd(onPinchEnd);
const pan = Gesture.Pan().withTestId('pan').enabled(panEnabled && gesturesEnabled).maxPointers(1).onStart(onPanStart).onChange(onPanChange).onEnd(onPanEnd);
const tap = Gesture.Tap().withTestId('tap').enabled(tapsEnabled && gesturesEnabled).maxDuration(250).numberOfTaps(1).runOnJS(true).onEnd(e => onTap === null || onTap === void 0 ? void 0 : onTap(e));
const doubleTap = Gesture.Tap().withTestId('doubleTap').enabled(tapsEnabled && gesturesEnabled).maxDuration(250).numberOfTaps(2).onEnd(onDoubleTapEnd);
const longPress = Gesture.LongPress().withTestId('longPress').enabled(gesturesEnabled).minDuration(longPressDuration).runOnJS(true).onStart(e => {
onLongPress && onLongPress(e);
});
const measureRoot = e => {
rootSize.width.value = e.nativeEvent.layout.width;
rootSize.height.value = e.nativeEvent.layout.height;
};
const measureChild = e => {
childSize.width.value = e.nativeEvent.layout.width;
childSize.height.value = e.nativeEvent.layout.height;
};
const detectorStyle = useAnimatedStyle(() => {
return {
width: extendedSize.width.value,
height: extendedSize.height.value,
transform: [{
translateX: translate.x.value
}, {
translateY: translate.y.value
}, {
scale: scale.value
}]
};
}, [extendedSize, translate, scale]);
const getState = () => {
return {
containerSize: {
width: rootSize.width.value,
height: rootSize.height.value
},
childSize: {
width: childSize.width.value,
height: childSize.height.value
},
maxScale: maxScale.value,
translateX: translate.x.value,
translateY: translate.y.value,
scale: scale.value
};
};
const setState = (state, animate = true) => {
const toScale = clamp(state.scale, minScale, maxScale.value);
const {
x: boundX,
y: boundY
} = boundsFn(toScale);
const toX = clamp(state.translateX, -1 * boundX, boundX);
const toY = clamp(state.translateY, -1 * boundY, boundY);
set(toX, toY, toScale, animate);
};
const getVisibleRect = () => {
return getRect({
scale: scale.value,
itemSize: {
width: childSize.width.value,
height: childSize.height.value
},
containerSize: {
width: rootSize.width.value,
height: rootSize.height.value
},
translation: {
x: translate.x.value,
y: translate.y.value
}
});
};
const zoom = (newScale, position) => {
const toScale = clamp(newScale, minScale, maxScale.value);
let focal = position;
if (focal !== undefined) {
focal = {
x: clamp(focal.x, 0, childSize.width.value),
y: clamp(focal.y, 0, childSize.height.value)
};
} else {
const frame = getVisibleRect();
focal = {
x: frame.x + frame.width / 2,
y: frame.y + frame.height / 2
};
}
const centerX = childSize.width.value / 2;
const centerY = childSize.height.value / 2;
const originX = focal.x - centerX;
const originY = focal.y - centerY;
const signedDistanceCenterX = centerX - focal.x;
const signedDistanceCenterY = centerY - focal.y;
const translateX = signedDistanceCenterX + (originX - originX * toScale);
const translateY = signedDistanceCenterY + (originY - originY * toScale);
const {
x: boundX,
y: boundY
} = boundsFn(toScale);
const toX = clamp(translateX, -1 * boundX, boundX);
const toY = clamp(translateY, -1 * boundY, boundY);
set(toX, toY, toScale, true);
};
useImperativeHandle(reference, () => ({
reset: (animate = true) => set(0, 0, minScale, animate),
getState: getState,
setTransformState: setState,
zoom: zoom,
getVisibleRect: getVisibleRect
}));
const composedTap = Gesture.Exclusive(doubleTap, tap, longPress);
const composedGesture = Gesture.Race(pinch, pan, composedTap);
return /*#__PURE__*/React.createElement(View, {
style: [style ?? styles.flex, styles.center],
onLayout: measureRoot
}, /*#__PURE__*/React.createElement(GestureDetector, {
gesture: composedGesture
}, /*#__PURE__*/React.createElement(Animated.View, {
testID: 'root',
style: [detectorStyle, styles.center]
}, /*#__PURE__*/React.createElement(Animated.View, {
testID: 'child',
onLayout: measureChild
}, children))));
};
const styles = StyleSheet.create({
flex: {
flex: 1
},
center: {
justifyContent: 'center',
alignItems: 'center'
}
});
export default withResumableValidation(ResumableZoom);
//# sourceMappingURL=ResumableZoom.js.map