feat(iOS): Implement cursor style prop

# Conflicts:
#	packages/react-native/Libraries/StyleSheet/StyleSheetTypes.d.ts

packages/react-native/Libraries/Components/View/ReactNativeStyleAttributes.js

@@ -144,6 +144,7 @@ const ReactNativeStyleAttributes: {[string]: AnyAttributeType, ...} = {
   borderTopLeftRadius: true,
   borderTopRightRadius: true,
   borderTopStartRadius: true,
+  cursor: true,
   opacity: true,
   pointerEvents: true,
 

packages/react-native/Libraries/StyleSheet/StyleSheetTypes.js

@@ -34,6 +34,8 @@ export type EdgeInsetsValue = {
   bottom: number,
 };
 
+export type CursorValue = ?('auto' | 'pointer');
+
 export type DimensionValue = number | string | 'auto' | AnimatedNode | null;
 export type AnimatableNumericValue = number | AnimatedNode;
 
@@ -729,6 +731,7 @@ export type ____ViewStyle_InternalCore = $ReadOnly<{
   opacity?: AnimatableNumericValue,
   elevation?: number,
   pointerEvents?: 'auto' | 'none' | 'box-none' | 'box-only',
+  cursor?: CursorValue,
 }>;
 
 export type ____ViewStyle_Internal = $ReadOnly<{

packages/react-native/React/Base/RCTConvert.h

@@ -11,6 +11,7 @@
 #import <React/RCTAnimationType.h>
 #import <React/RCTBorderCurve.h>
 #import <React/RCTBorderStyle.h>
+#import <React/RCTCursor.h>
 #import <React/RCTDefines.h>
 #import <React/RCTLog.h>
 #import <React/RCTPointerEvents.h>
@@ -80,6 +81,8 @@ typedef NSURL RCTFileURL;
 + (UIBarStyle)UIBarStyle:(id)json __deprecated;
 #endif
 
++ (RCTCursor)RCTCursor:(id)json;
+
 + (CGFloat)CGFloat:(id)json;
 + (CGPoint)CGPoint:(id)json;
 + (CGSize)CGSize:(id)json;

packages/react-native/React/Base/RCTConvert.m

@@ -549,6 +549,15 @@ + (UIKeyboardType)UIKeyboardType:(id)json RCT_DYNAMIC
     UIBarStyleDefault,
     integerValue)
 
+RCT_ENUM_CONVERTER(
+    RCTCursor,
+    (@{
+      @"auto" : @(RCTCursorAuto),
+      @"pointer" : @(RCTCursorPointer),
+    }),
+    RCTCursorAuto,
+    integerValue)
+
 static void convertCGStruct(const char *type, NSArray *fields, CGFloat *result, id json)
 {
   NSUInteger count = fields.count;

packages/react-native/React/Fabric/Mounting/ComponentViews/View/RCTViewComponentView.mm

@@ -32,6 +32,7 @@ @implementation RCTViewComponentView {
   BOOL _needsInvalidateLayer;
   BOOL _isJSResponder;
   BOOL _removeClippedSubviews;
+  Cursor _cursor;
   NSMutableArray<UIView *> *_reactSubviews;
   NSSet<NSString *> *_Nullable _propKeysManagedByAnimated_DO_NOT_USE_THIS_IS_BROKEN;
 }
@@ -256,6 +257,12 @@ - (void)updateProps:(const Props::Shared &)props oldProps:(const Props::Shared &
   if (oldViewProps.backfaceVisibility != newViewProps.backfaceVisibility) {
     self.layer.doubleSided = newViewProps.backfaceVisibility == BackfaceVisibility::Visible;
   }
+
+  // `cursor`
+  if (oldViewProps.cursor != newViewProps.cursor) {
+    _cursor = newViewProps.cursor;
+    needsInvalidateLayer = YES;
+  }
 
   // `shouldRasterize`
   if (oldViewProps.shouldRasterize != newViewProps.shouldRasterize) {
@@ -591,6 +598,31 @@ - (void)invalidateLayer
   } else {
     layer.shadowPath = nil;
   }
+
+  // Stage 1.5. Cursor / Hover Effects
+  if (@available(iOS 17.0, *)) {
+    UIHoverStyle *hoverStyle = nil;
+    if (_cursor == Cursor::Pointer) {
+      const RCTCornerInsets cornerInsets =
+          RCTGetCornerInsets(RCTCornerRadiiFromBorderRadii(borderMetrics.borderRadii), UIEdgeInsetsZero);
+#if TARGET_OS_IOS
+      // Due to an Apple bug, it seems on iOS, UIShapes made with `[UIShape shapeWithBezierPath:]`
+      // evaluate their shape on the superviews' coordinate space. This leads to the hover shape
+      // rendering incorrectly on iOS, iOS apps in compatibility mode on visionOS, but not on visionOS.
+      // To work around this, for iOS, we can calculate the border path based on `view.frame` (the
+      // superview's coordinate space) instead of view.bounds.
+      CGPathRef borderPath = RCTPathCreateWithRoundedRect(self.frame, cornerInsets, NULL);
+#else // TARGET_OS_VISION
+      CGPathRef borderPath = RCTPathCreateWithRoundedRect(self.bounds, cornerInsets, NULL);
+#endif
+      UIBezierPath *bezierPath = [UIBezierPath bezierPathWithCGPath:borderPath];
+      CGPathRelease(borderPath);
+      UIShape *shape = [UIShape shapeWithBezierPath:bezierPath];
+
+      hoverStyle = [UIHoverStyle styleWithEffect:[UIHoverAutomaticEffect effect] shape:shape];
+    }
+    [self setHoverStyle:hoverStyle];
+  }
 
   // Stage 2. Border Rendering
   const bool useCoreAnimationBorderRendering =

packages/react-native/React/Views/RCTCursor.h

@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import <Foundation/Foundation.h>
+
+typedef NS_ENUM(NSInteger, RCTCursor) {
+  RCTCursorAuto,
+  RCTCursorPointer,
+};
+

packages/react-native/React/Views/RCTView.h

@@ -9,6 +9,7 @@
 
 #import <React/RCTBorderCurve.h>
 #import <React/RCTBorderStyle.h>
+#import <React/RCTCursor.h>
 #import <React/RCTComponent.h>
 #import <React/RCTPointerEvents.h>
 
@@ -120,6 +121,8 @@ extern const UIAccessibilityTraits SwitchAccessibilityTrait;
  */
 @property (nonatomic, assign) UIEdgeInsets hitTestEdgeInsets;
 
+@property (nonatomic, assign) RCTCursor cursor;
+
 /**
  * (Experimental and unused for Paper) Pointer event handlers.
  */

packages/react-native/React/Views/RCTView.m

@@ -136,6 +136,7 @@ - (instancetype)initWithFrame:(CGRect)frame
     _borderCurve = RCTBorderCurveCircular;
     _borderStyle = RCTBorderStyleSolid;
     _hitTestEdgeInsets = UIEdgeInsetsZero;
+    _cursor = RCTCursorAuto;
 
     _backgroundColor = super.backgroundColor;
   }
@@ -796,6 +797,8 @@ - (void)displayLayer:(CALayer *)layer
 
   RCTUpdateShadowPathForView(self);
 
+  RCTUpdateHoverStyleForView(self);
+
   const RCTCornerRadii cornerRadii = [self cornerRadii];
   const UIEdgeInsets borderInsets = [self bordersAsInsets];
   const RCTBorderColors borderColors = [self borderColorsWithTraitCollection:self.traitCollection];
@@ -891,6 +894,31 @@ static void RCTUpdateShadowPathForView(RCTView *view)
   }
 }
 
+static void RCTUpdateHoverStyleForView(RCTView *view)
+{
+  if (@available(iOS 17.0, *)) {
+    UIHoverStyle *hoverStyle = nil;
+    if ([view cursor] == RCTCursorPointer) {
+      const RCTCornerRadii cornerRadii = [view cornerRadii];
+      const RCTCornerInsets cornerInsets = RCTGetCornerInsets(cornerRadii, UIEdgeInsetsZero);
+#if TARGET_OS_IOS
+      // Due to an Apple bug, it seems on iOS, `[UIShape shapeWithBezierPath:]` needs to
+      // be calculated in the superviews' coordinate space (view.frame). This is not true
+      // on other platforms like visionOS.
+      CGPathRef borderPath = RCTPathCreateWithRoundedRect(view.frame, cornerInsets, NULL);
+#else // TARGET_OS_VISION
+      CGPathRef borderPath = RCTPathCreateWithRoundedRect(view.bounds, cornerInsets, NULL);
+#endif
+      UIBezierPath *bezierPath = [UIBezierPath bezierPathWithCGPath:borderPath];
+      CGPathRelease(borderPath);
+      UIShape *shape = [UIShape shapeWithBezierPath:bezierPath];
+
+      hoverStyle = [UIHoverStyle styleWithEffect:[UIHoverHighlightEffect effect] shape:shape];
+    }
+    [view setHoverStyle:hoverStyle];
+  }
+}
+
 - (void)updateClippingForLayer:(CALayer *)layer
 {
   CALayer *mask = nil;

packages/react-native/React/Views/RCTViewManager.m

@@ -13,6 +13,7 @@
 #import "RCTBridge.h"
 #import "RCTConvert+Transform.h"
 #import "RCTConvert.h"
+#import "RCTCursor.h"
 #import "RCTLog.h"
 #import "RCTShadowView.h"
 #import "RCTUIManager.h"
@@ -195,6 +196,7 @@ - (RCTShadowView *)shadowView
 
 RCT_EXPORT_VIEW_PROPERTY(backgroundColor, UIColor)
 RCT_REMAP_VIEW_PROPERTY(backfaceVisibility, layer.doubleSided, css_backface_visibility_t)
+RCT_EXPORT_VIEW_PROPERTY(cursor, RCTCursor)
 RCT_REMAP_VIEW_PROPERTY(opacity, alpha, CGFloat)
 RCT_REMAP_VIEW_PROPERTY(shadowColor, layer.shadowColor, CGColor)
 RCT_REMAP_VIEW_PROPERTY(shadowOffset, layer.shadowOffset, CGSize)

packages/react-native/ReactCommon/react/renderer/components/view/BaseViewProps.cpp

@@ -140,6 +140,15 @@ BaseViewProps::BaseViewProps(
                                                        "shadowRadius",
                                                        sourceProps.shadowRadius,
                                                        {})),
+      cursor(
+          CoreFeatures::enablePropIteratorSetter
+              ? sourceProps.cursor
+              : convertRawProp(
+                    context,
+                    rawProps,
+                    "cursor",
+                    sourceProps.cursor,
+                    {})),
       transform(
           CoreFeatures::enablePropIteratorSetter ? sourceProps.transform
                                                  : convertRawProp(

packages/react-native/ReactCommon/react/renderer/components/view/BaseViewProps.h

@@ -51,6 +51,8 @@ class BaseViewProps : public YogaStylableProps, public AccessibilityProps {
   Size shadowOffset{0, -3};
   Float shadowOpacity{};
   Float shadowRadius{3};
+
+  Cursor cursor{};
 
   // Transform
   Transform transform{};

packages/react-native/ReactCommon/react/renderer/components/view/conversions.h

@@ -705,6 +705,28 @@ inline void fromRawValue(
   react_native_expect(false);
 }
 
+inline void fromRawValue(
+    const PropsParserContext& context,
+    const RawValue& value,
+    Cursor& result) {
+  result = Cursor::Auto;
+  react_native_expect(value.hasType<std::string>());
+  if (!value.hasType<std::string>()) {
+    return;
+  }
+  auto stringValue = (std::string)value;
+  if (stringValue == "auto") {
+    result = Cursor::Auto;
+    return;
+  }
+  if (stringValue == "pointer") {
+    result = Cursor::Pointer;
+    return;
+  }
+  LOG(ERROR) << "Could not parse Cursor:" << stringValue;
+  react_native_expect(false);
+}
+
 inline void fromRawValue(
     const PropsParserContext& /*context*/,
     const RawValue& value,

packages/react-native/ReactCommon/react/renderer/components/view/primitives.h

@@ -91,6 +91,8 @@ enum class BorderCurve : uint8_t { Circular, Continuous };
 
 enum class BorderStyle : uint8_t { Solid, Dotted, Dashed };
 
+enum class Cursor : uint8_t { Auto, Pointer };
+
 enum class LayoutConformance : uint8_t { Undefined, Classic, Strict };
 
 template <typename T>

packages/rn-tester/js/examples/Cursor/CursorExample.js

@@ -0,0 +1,88 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+'use strict';
+
+const React = require('react');
+const {Image, StyleSheet, View} = require('react-native');
+
+const styles = StyleSheet.create({
+  box: {
+    width: 100,
+    height: 100,
+    borderWidth: 2,
+  },
+  circle: {
+    width: 100,
+    height: 100,
+    borderWidth: 2,
+    borderRadius: 50,
+  },
+  halfcircle: {
+    width: 100,
+    height: 100,
+    borderWidth: 2,
+    borderTopStartRadius: 50,
+    borderBottomStartRadius: 50,
+  },
+  solid: {
+    backgroundColor: 'blue',
+  },
+  pointer: {
+    cursor: 'pointer',
+  },
+  row: {
+    flexDirection: 'row', 
+    flexWrap: 'wrap',
+    gap: 10,
+  }
+});
+
+function CursorExampleAuto() {
+  return (
+    <View style={styles.row}>
+      <View style={styles.box} />
+      <View style={styles.circle} />
+      <View style={styles.halfcircle} />
+      <View style={[styles.box, styles.solid]} />
+      <View style={[styles.circle, styles.solid]} />
+      <View style={[styles.halfcircle, styles.solid]} />
+    </View>
+  );
+}
+
+function CursorExamplePointer() {
+  return (
+    <View style={styles.row}>
+      <View style={[styles.box, styles.pointer]} />
+      <View style={[styles.circle, styles.pointer]} />
+      <View style={[styles.halfcircle, styles.pointer]} />
+      <View style={[styles.box, styles.solid, styles.pointer]} />
+      <View style={[styles.circle, styles.solid, styles.pointer]} />
+      <View style={[styles.halfcircle, styles.solid, styles.pointer]} />
+    </View>
+  );
+}
+
+exports.title = 'Cursor';
+exports.category = 'UI';
+exports.description =
+  'Demonstrates setting a cursor, which affects the appearance when a pointer is over the View.';
+exports.examples = [
+  {
+    title: 'Default',
+    description: 'Cursor: \'auto\' or no cursor set ',
+    render: CursorExampleAuto,
+  },
+  {
+    title: 'Pointer',
+    description: "cursor: pointer",
+    render: CursorExamplePointer,
+  },
+];

packages/rn-tester/js/utils/RNTesterList.ios.js

@@ -199,6 +199,10 @@ const APIs: Array<RNTesterModuleInfo> = ([
     key: 'CrashExample',
     module: require('../examples/Crash/CrashExample'),
   },
+  {
+    key: 'CursorExample',
+    module: require('../examples/Cursor/CursorExample'),
+  },
   {
     key: 'DevSettings',
     module: require('../examples/DevSettings/DevSettingsExample'),