Simplify Android event builders (#3603)

## Description

Merges declaration and initialization of fields in the event builder
classes

## Test plan

Build android

Author: j-piasecki

packages/react-native-gesture-handler/android/src/main/java/com/swmansion/gesturehandler/react/eventbuilders/FlingGestureHandlerEventDataBuilder.kt

@@ -6,17 +6,10 @@ import com.swmansion.gesturehandler.core.FlingGestureHandler
 
 class FlingGestureHandlerEventDataBuilder(handler: FlingGestureHandler) :
   GestureHandlerEventDataBuilder<FlingGestureHandler>(handler) {
-  private val x: Float
-  private val y: Float
-  private val absoluteX: Float
-  private val absoluteY: Float
-
-  init {
-    x = handler.lastRelativePositionX
-    y = handler.lastRelativePositionY
-    absoluteX = handler.lastPositionInWindowX
-    absoluteY = handler.lastPositionInWindowY
-  }
+  private val x: Float = handler.lastRelativePositionX
+  private val y: Float = handler.lastRelativePositionY
+  private val absoluteX: Float = handler.lastPositionInWindowX
+  private val absoluteY: Float = handler.lastPositionInWindowY
 
   override fun buildEventData(eventData: WritableMap) {
     super.buildEventData(eventData)

packages/react-native-gesture-handler/android/src/main/java/com/swmansion/gesturehandler/react/eventbuilders/GestureHandlerEventDataBuilder.kt

@@ -4,17 +4,10 @@ import com.facebook.react.bridge.WritableMap
 import com.swmansion.gesturehandler.core.GestureHandler
 
 abstract class GestureHandlerEventDataBuilder<T : GestureHandler>(handler: T) {
-  private val numberOfPointers: Int
-  private val handlerTag: Int
-  private val state: Int
-  private val pointerType: Int
-
-  init {
-    numberOfPointers = handler.numberOfPointers
-    handlerTag = handler.tag
-    state = handler.state
-    pointerType = handler.pointerType
-  }
+  private val handlerTag: Int = handler.tag
+  private val state: Int = handler.state
+  private val pointerType: Int = handler.pointerType
+  private val numberOfPointers: Int = handler.numberOfPointers
 
   open fun buildEventData(eventData: WritableMap) {
     eventData.putInt("numberOfPointers", numberOfPointers)

packages/react-native-gesture-handler/android/src/main/java/com/swmansion/gesturehandler/react/eventbuilders/HoverGestureHandlerEventDataBuilder.kt

@@ -7,19 +7,11 @@ import com.swmansion.gesturehandler.core.StylusData
 
 class HoverGestureHandlerEventDataBuilder(handler: HoverGestureHandler) :
   GestureHandlerEventDataBuilder<HoverGestureHandler>(handler) {
-  private val x: Float
-  private val y: Float
-  private val absoluteX: Float
-  private val absoluteY: Float
-  private val stylusData: StylusData
-
-  init {
-    x = handler.lastRelativePositionX
-    y = handler.lastRelativePositionY
-    absoluteX = handler.lastPositionInWindowX
-    absoluteY = handler.lastPositionInWindowY
-    stylusData = handler.stylusData
-  }
+  private val x: Float = handler.lastRelativePositionX
+  private val y: Float = handler.lastRelativePositionY
+  private val absoluteX: Float = handler.lastPositionInWindowX
+  private val absoluteY: Float = handler.lastPositionInWindowY
+  private val stylusData: StylusData = handler.stylusData
 
   override fun buildEventData(eventData: WritableMap) {
     super.buildEventData(eventData)

packages/react-native-gesture-handler/android/src/main/java/com/swmansion/gesturehandler/react/eventbuilders/LongPressGestureHandlerEventDataBuilder.kt

@@ -6,19 +6,11 @@ import com.swmansion.gesturehandler.core.LongPressGestureHandler
 
 class LongPressGestureHandlerEventDataBuilder(handler: LongPressGestureHandler) :
   GestureHandlerEventDataBuilder<LongPressGestureHandler>(handler) {
-  private val x: Float
-  private val y: Float
-  private val absoluteX: Float
-  private val absoluteY: Float
-  private val duration: Int
-
-  init {
-    x = handler.lastRelativePositionX
-    y = handler.lastRelativePositionY
-    absoluteX = handler.lastPositionInWindowX
-    absoluteY = handler.lastPositionInWindowY
-    duration = handler.duration
-  }
+  private val x: Float = handler.lastRelativePositionX
+  private val y: Float = handler.lastRelativePositionY
+  private val absoluteX: Float = handler.lastPositionInWindowX
+  private val absoluteY: Float = handler.lastPositionInWindowY
+  private val duration: Int = handler.duration
 
   override fun buildEventData(eventData: WritableMap) {
     super.buildEventData(eventData)

packages/react-native-gesture-handler/android/src/main/java/com/swmansion/gesturehandler/react/eventbuilders/NativeGestureHandlerEventDataBuilder.kt

@@ -5,11 +5,7 @@ import com.swmansion.gesturehandler.core.NativeViewGestureHandler
 
 class NativeGestureHandlerEventDataBuilder(handler: NativeViewGestureHandler) :
   GestureHandlerEventDataBuilder<NativeViewGestureHandler>(handler) {
-  private val pointerInside: Boolean
-
-  init {
-    pointerInside = handler.isWithinBounds
-  }
+  private val pointerInside: Boolean = handler.isWithinBounds
 
   override fun buildEventData(eventData: WritableMap) {
     super.buildEventData(eventData)

packages/react-native-gesture-handler/android/src/main/java/com/swmansion/gesturehandler/react/eventbuilders/PanGestureHandlerEventDataBuilder.kt

@@ -7,27 +7,15 @@ import com.swmansion.gesturehandler.core.StylusData
 
 class PanGestureHandlerEventDataBuilder(handler: PanGestureHandler) :
   GestureHandlerEventDataBuilder<PanGestureHandler>(handler) {
-  private val x: Float
-  private val y: Float
-  private val absoluteX: Float
-  private val absoluteY: Float
-  private val translationX: Float
-  private val translationY: Float
-  private val velocityX: Float
-  private val velocityY: Float
-  private val stylusData: StylusData
-
-  init {
-    x = handler.lastRelativePositionX
-    y = handler.lastRelativePositionY
-    absoluteX = handler.lastPositionInWindowX
-    absoluteY = handler.lastPositionInWindowY
-    translationX = handler.translationX
-    translationY = handler.translationY
-    velocityX = handler.velocityX
-    velocityY = handler.velocityY
-    stylusData = handler.stylusData
-  }
+  private val x: Float = handler.lastRelativePositionX
+  private val y: Float = handler.lastRelativePositionY
+  private val absoluteX: Float = handler.lastPositionInWindowX
+  private val absoluteY: Float = handler.lastPositionInWindowY
+  private val translationX: Float = handler.translationX
+  private val translationY: Float = handler.translationY
+  private val velocityX: Float = handler.velocityX
+  private val velocityY: Float = handler.velocityY
+  private val stylusData: StylusData = handler.stylusData
 
   override fun buildEventData(eventData: WritableMap) {
     super.buildEventData(eventData)

packages/react-native-gesture-handler/android/src/main/java/com/swmansion/gesturehandler/react/eventbuilders/PinchGestureHandlerEventDataBuilder.kt

@@ -6,17 +6,10 @@ import com.swmansion.gesturehandler.core.PinchGestureHandler
 
 class PinchGestureHandlerEventDataBuilder(handler: PinchGestureHandler) :
   GestureHandlerEventDataBuilder<PinchGestureHandler>(handler) {
-  private val scale: Double
-  private val focalX: Float
-  private val focalY: Float
-  private val velocity: Double
-
-  init {
-    scale = handler.scale
-    focalX = handler.focalPointX
-    focalY = handler.focalPointY
-    velocity = handler.velocity
-  }
+  private val scale: Double = handler.scale
+  private val focalX: Float = handler.focalPointX
+  private val focalY: Float = handler.focalPointY
+  private val velocity: Double = handler.velocity
 
   override fun buildEventData(eventData: WritableMap) {
     super.buildEventData(eventData)

packages/react-native-gesture-handler/android/src/main/java/com/swmansion/gesturehandler/react/eventbuilders/RotationGestureHandlerEventDataBuilder.kt

@@ -6,17 +6,10 @@ import com.swmansion.gesturehandler.core.RotationGestureHandler
 
 class RotationGestureHandlerEventDataBuilder(handler: RotationGestureHandler) :
   GestureHandlerEventDataBuilder<RotationGestureHandler>(handler) {
-  private val rotation: Double
-  private val anchorX: Float
-  private val anchorY: Float
-  private val velocity: Double
-
-  init {
-    rotation = handler.rotation
-    anchorX = handler.anchorX
-    anchorY = handler.anchorY
-    velocity = handler.velocity
-  }
+  private val rotation: Double = handler.rotation
+  private val anchorX: Float = handler.anchorX
+  private val anchorY: Float = handler.anchorY
+  private val velocity: Double = handler.velocity
 
   override fun buildEventData(eventData: WritableMap) {
     super.buildEventData(eventData)

packages/react-native-gesture-handler/android/src/main/java/com/swmansion/gesturehandler/react/eventbuilders/TapGestureHandlerEventDataBuilder.kt

@@ -6,17 +6,10 @@ import com.swmansion.gesturehandler.core.TapGestureHandler
 
 class TapGestureHandlerEventDataBuilder(handler: TapGestureHandler) :
   GestureHandlerEventDataBuilder<TapGestureHandler>(handler) {
-  private val x: Float
-  private val y: Float
-  private val absoluteX: Float
-  private val absoluteY: Float
-
-  init {
-    x = handler.lastRelativePositionX
-    y = handler.lastRelativePositionY
-    absoluteX = handler.lastPositionInWindowX
-    absoluteY = handler.lastPositionInWindowY
-  }
+  private val x: Float = handler.lastRelativePositionX
+  private val y: Float = handler.lastRelativePositionY
+  private val absoluteX: Float = handler.lastPositionInWindowX
+  private val absoluteY: Float = handler.lastPositionInWindowY
 
   override fun buildEventData(eventData: WritableMap) {
     super.buildEventData(eventData)