Use jextract to generate bindings

.github/workflows/ci.yml

@@ -49,6 +49,16 @@ jobs:
         if: matrix.os == 'windows-latest'
         with:
           toolchain: 'stable'
+      - name: Setup jextract
+        if: matrix.os == 'windows-latest'
+        shell: powershell
+        run: |
+          Invoke-WebRequest https://download.java.net/java/early_access/jextract/1/openjdk-20-jextract+1-2_windows-x64_bin.tar.gz -OutFile jextract.tar.gz
+
+          tar xzvf jextract.tar.gz
+
+          $path = (Resolve-Path jextract-20\bin).Path
+          echo $path | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
       - name: Setup MacOS signing
         if: matrix.os == 'macos-latest'
         env:

app/desktop/build.gradle.kts

@@ -9,6 +9,7 @@ plugins {
 
 dependencies {
     implementation(projects.app.shared)
+    implementation(projects.app.desktop.uwpHelper)
     implementation(compose.desktop.currentOs)
     implementation(libs.logback)
     implementation(libs.ktor.server.netty)
@@ -79,16 +80,8 @@ tasks {
         archiveExtension = "tar.gz"
     }
 
-    val buildUwpHelper by registering(Exec::class) {
-        inputs.dir("uwp_helper/src")
-        outputs.dir("uwp_helper/target")
-
-        workingDir = file("uwp_helper")
-        commandLine("cargo", "build", "--release")
-    }
-
     val prepareUwpWorkspace by registering(Copy::class) {
-        dependsOn(buildUwpHelper)
+        dependsOn("uwp_helper:compileRust")
         from(named("packageReleaseAppImage")) {
             eachFile {
                 path = path.substringAfter("Tonbrett")

app/desktop/src/main/kotlin/ConfigFile.kt

@@ -13,15 +13,9 @@ import java.nio.file.StandardOpenOption
 import kotlin.io.path.*
 
 val windowsAppDataFolder: String? by lazy {
-    val result = runCatching {
-        NativeUtil.getAppdataFolder()
-    }
-
-    if (result.isFailure) {
-        result.exceptionOrNull()!!.printStackTrace()
-    }
-
-    result.getOrNull()
+    runCatching { getAppDataRoaming() }
+        .onFailure(Throwable::printStackTrace)
+        .getOrNull()
 }
 
 @Serializable

app/desktop/src/main/kotlin/NativeUtil.kt

@@ -0,0 +1,37 @@
+package dev.schlaubi.tonbrett.app.desktop
+
+import dev.schlaubi.tonbrett.app.desktop.uwp_helper.AppDataRoamingResult.`is_error$get`
+import dev.schlaubi.tonbrett.app.desktop.uwp_helper.AppDataRoamingResult.`length$get`
+import dev.schlaubi.tonbrett.app.desktop.uwp_helper.UwpHelper.*
+import java.lang.foreign.Arena
+import java.net.URI
+
+/**
+ * Tries to launch the URI using the UWP `Launcher`.
+ *
+ * @param uri the [URI] to launch
+ */
+fun launchUri(uri: URI) = Arena.openConfined().use { arena ->
+    val url = arena.allocateUtf8String(uri.toString())
+    launch_uri(url)
+}
+
+/**
+ * Tries to retrieve the current UWP app data folder.
+ *
+ * @return the absolute path to the folder
+ */
+fun getAppDataRoaming() = Arena.openConfined().use { arena ->
+    val result = get_app_data_roaming(arena)
+    val isError = `is_error$get`(result)
+    val length = `length$get`(result).coerceAtLeast(0)
+    val buffer = arena.allocateArray(uint16_t, length)
+    copy_string_from_get_app_data_roaming_result_into_buffer(result, buffer)
+    val shortArray = buffer.toArray(uint16_t)
+    val charArray = CharArray(shortArray.size)
+    for ((index, short) in shortArray.withIndex()) {
+        charArray[index] = short.toInt().toChar()
+    }
+    val string = String(charArray)
+    if (isError) throw Exception(string) else string
+}

app/desktop/src/main/kotlin/URIUtil.kt

@@ -5,7 +5,7 @@ import java.net.URI
 
 fun browseUrl(url: URI) {
     if (System.getProperty("os.name").contains("windows", ignoreCase = true) && windowsAppDataFolder != null) {
-        NativeUtil.launchUri(url)
+        launchUri(url)
     } else {
         val desktop = Desktop.getDesktop()
         if (desktop.isSupported(Desktop.Action.BROWSE)) {