initial vector tile integration

build.gradle.kts

@@ -8,5 +8,6 @@ plugins {
     alias(libs.plugins.jetbrainsCompose) apply false
     alias(libs.plugins.kotlinMultiplatform) apply false
     alias(libs.plugins.composeCompiler) apply false
+    alias(libs.plugins.kotlinSerialization) apply false
     alias(libs.plugins.vanniktechPublish) apply false
-}
+}

demo/composeApp/src/androidMain/kotlin/ovh/plrapps/mapcompose/demo/ui/screens/SwissMapVectorDemo.android.kt

@@ -0,0 +1,14 @@
+package ovh.plrapps.mapcompose.demo.ui.screens
+
+import androidx.compose.runtime.Composable
+import androidx.lifecycle.viewmodel.compose.viewModel
+import ovh.plrapps.mapcompose.demo.viewmodels.SwissMapVectorDemoVM
+
+actual object SwissMapVectorDemo {
+    @Composable
+    actual fun Content() {
+        val viewModel: SwissMapVectorDemoVM = viewModel()
+
+        SwissMapVectorCommonUi(viewModel)
+    }
+}

demo/composeApp/src/androidMain/kotlin/ovh/plrapps/mapcompose/demo/ui/screens/VectorDemo.android.kt

@@ -0,0 +1,14 @@
+package ovh.plrapps.mapcompose.demo.ui.screens
+
+import androidx.compose.runtime.Composable
+import androidx.lifecycle.viewmodel.compose.viewModel
+import ovh.plrapps.mapcompose.demo.viewmodels.VectorDemoVM
+
+actual object VectorDemo {
+    @Composable
+    actual fun Content() {
+        val screenModel: VectorDemoVM = viewModel()
+
+        VectorCommonUi(screenModel)
+    }
+}

demo/composeApp/src/androidMain/kotlin/ovh/plrapps/mapcompose/demo/viewmodels/Http.kt

@@ -1,7 +1,12 @@
 package ovh.plrapps.mapcompose.demo.viewmodels
 
+import kotlinx.io.Buffer
+import kotlinx.io.RawSource
 import kotlinx.io.asSource
+import org.jetbrains.compose.resources.ExperimentalResourceApi
 import ovh.plrapps.mapcompose.core.TileStreamProvider
+import ovh.plrapps.mapcompose.vector.core.VectorTileStreamProvider
+import ovh.plrapps.mapcomposemp.demo.Res
 import java.net.HttpURLConnection
 import java.net.URL
 
@@ -42,4 +47,44 @@ actual fun makeOsmTileStreamProvider() : TileStreamProvider {
             null
         }
     }
+}
+
+actual class OSMVectorTileStreamProvider actual constructor(actual override val styleUrl: String) :
+    VectorTileStreamProvider {
+
+    @OptIn(ExperimentalResourceApi::class)
+    actual override suspend fun loadResources(url: String): RawSource? {
+        return when (url) {
+            "files/style_street_v2.json" -> {
+                val buffer = Buffer()
+                buffer.write(Res.readBytes(url))
+                buffer
+            }
+            else -> getResourceAsStream(url)
+        }
+    }
+
+    actual override suspend fun getTileStream(
+        tileUrl: String,
+        row: Int,
+        col: Int,
+        zoomLvl: Int
+    ): RawSource? {
+        return getResourceAsStream(tileUrl)
+    }
+
+    private fun getResourceAsStream(url: String): RawSource? {
+        return try {
+            val url = URL(url)
+            val connection = url.openConnection() as HttpURLConnection
+            // OSM requires a user-agent
+            connection.setRequestProperty("User-Agent", "Chrome/120.0.0.0 Safari/537.36")
+            connection.doInput = true
+            connection.connect()
+            connection.inputStream.asSource()
+        } catch (e: Exception) {
+            e.printStackTrace()
+            null
+        }
+    }
 }