react-native-google-maps-plus/android/src/main/java/com/rngooglemapsplus/MapPolygonBuilder.kt at 06528dd5d3efad5b19df1dafb80bad7c96f32987 · pinpong/react-native-google-maps-plus · GitHub

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package com.rngooglemapsplus

import android.graphics.Color
import com.facebook.react.uimanager.PixelUtil.dpToPx
import com.google.android.gms.maps.model.Polygon
import com.google.android.gms.maps.model.PolygonOptions
import com.rngooglemapsplus.extensions.toColor
import com.rngooglemapsplus.extensions.toLatLng

class MapPolygonBuilder {
  fun build(poly: RNPolygon): PolygonOptions =
    PolygonOptions().apply {
      poly.coordinates.forEach { pt ->
        add(
          pt.toLatLng(),
        )
      }
      poly.fillColor?.let { fillColor(it.toColor()) }
      poly.strokeColor?.let { strokeColor(it.toColor()) }
      poly.strokeWidth?.let { strokeWidth(it.dpToPx()) }
      poly.pressable?.let { clickable(it) }
      poly.geodesic?.let { geodesic(it) }
      poly.holes?.forEach { hole ->
        addHole(hole.coordinates.map { it.toLatLng() })
      }
      poly.zIndex?.let { zIndex(it.toFloat()) }
    }

  fun update(
    prev: RNPolygon,
    next: RNPolygon,
    poly: Polygon,
  ) {
    val coordsChanged =
      prev.coordinates.size != next.coordinates.size ||
        !prev.coordinates.zip(next.coordinates).all { (a, b) ->
          a.latitude == b.latitude && a.longitude == b.longitude
        }

    if (coordsChanged) {
      poly.points = next.coordinates.map { it.toLatLng() }
    }

    val prevHoles = prev.holes?.toList() ?: emptyList()
    val nextHoles = next.holes?.toList() ?: emptyList()
    val holesChanged =
      prevHoles.size != nextHoles.size ||
        !prevHoles.zip(nextHoles).all { (ha, hb) ->
          ha.coordinates.size == hb.coordinates.size &&
            ha.coordinates.zip(hb.coordinates).all { (a, b) ->
              a.latitude == b.latitude && a.longitude == b.longitude
            }
        }

    if (holesChanged) {
      poly.holes =
        nextHoles.map { hole ->
          hole.coordinates.map { it.toLatLng() }
        }
    }

    if (prev.fillColor != next.fillColor) {
      poly.fillColor = next.fillColor?.toColor() ?: Color.TRANSPARENT
    }

    if (prev.strokeColor != next.strokeColor) {
      poly.strokeColor = next.strokeColor?.toColor() ?: Color.BLACK
    }

    if (prev.strokeWidth != next.strokeWidth) {
      poly.strokeWidth = next.strokeWidth?.dpToPx() ?: 1f
    }

    if (prev.pressable != next.pressable) {
      poly.isClickable = next.pressable ?: false
    }

    if (prev.geodesic != next.geodesic) {
      poly.isGeodesic = next.geodesic ?: false
    }

    if (prev.zIndex != next.zIndex) {
      poly.zIndex = next.zIndex?.toFloat() ?: 0f
    }
  }
}