Add java 21 multiboot support

.gitignore

@@ -2,6 +2,7 @@
 /build
 /*/build
 app_pojavlauncher/src/main/assets/components/jre
+/app_pojavlauncher/src/main/assets/components/jre-new/
 local.properties
 .idea/
 app_pojavlauncher/.cxx/

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/NewJREUtil.java

@@ -0,0 +1,115 @@
+package net.kdt.pojavlaunch;
+
+import static net.kdt.pojavlaunch.Architecture.archAsString;
+
+import android.app.Activity;
+import android.content.res.AssetManager;
+import android.util.Log;
+
+import net.kdt.pojavlaunch.multirt.MultiRTUtils;
+import net.kdt.pojavlaunch.multirt.Runtime;
+import net.kdt.pojavlaunch.utils.MathUtils;
+import net.kdt.pojavlaunch.value.launcherprofiles.LauncherProfiles;
+import net.kdt.pojavlaunch.value.launcherprofiles.MinecraftProfile;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+
+public class NewJREUtil {
+    private static boolean checkInternalRuntime(AssetManager assetManager, InternalRuntime internalRuntime) {
+        String launcher_runtime_version;
+        String installed_runtime_version = MultiRTUtils.readInternalRuntimeVersion(internalRuntime.name);
+        try {
+            launcher_runtime_version = Tools.read(assetManager.open(internalRuntime.path+"/version"));
+        }catch (IOException exc) {
+            //we don't have a runtime included!
+            //if we have one installed -> return true -> proceed (no updates but the current one should be functional)
+            //if we don't -> return false -> Cannot find compatible Java runtime
+            return installed_runtime_version != null;
+        }
+        // this implicitly checks for null, so it will unpack the runtime even if we don't have one installed
+        if(!launcher_runtime_version.equals(installed_runtime_version))
+            return unpackInternalRuntime(assetManager, internalRuntime, launcher_runtime_version);
+        else return true;
+    }
+
+    private static boolean unpackInternalRuntime(AssetManager assetManager, InternalRuntime internalRuntime, String version) {
+        try {
+            MultiRTUtils.installRuntimeNamedBinpack(
+                    assetManager.open(internalRuntime.path+"/universal.tar.xz"),
+                    assetManager.open(internalRuntime.path+"/bin-" + archAsString(Tools.DEVICE_ARCHITECTURE) + ".tar.xz"),
+                    internalRuntime.name, version);
+            MultiRTUtils.postPrepare(internalRuntime.name);
+            return true;
+        }catch (IOException e) {
+            Log.e("NewJREAuto", "Internal JRE unpack failed", e);
+            return false;
+        }
+    }
+    public static InternalRuntime getInternalRuntime(String s_runtime) {
+        Runtime runtime = MultiRTUtils.read(s_runtime);
+        if(runtime == null) return null;
+        for(InternalRuntime internalRuntime : InternalRuntime.values()) {
+            if(internalRuntime.name.equals(runtime.name)) return internalRuntime;
+        }
+        return null;
+    }
+
+    private static InternalRuntime findAppropriateInternalRuntime(int targetVersion) {
+        List<InternalRuntime> runtimeList = Arrays.asList(InternalRuntime.values());
+        return MathUtils.findNearestPositive(targetVersion, runtimeList, (runtime)->runtime.majorVersion);
+    }
+
+    /** @return true if everything is good, false otherwise.  */
+    public static boolean installNewJreIfNeeded(Activity activity, JMinecraftVersionList.Version versionInfo) {
+        //Now we have the reliable information to check if our runtime settings are good enough
+        if (versionInfo.javaVersion == null || versionInfo.javaVersion.component.equalsIgnoreCase("jre-legacy"))
+            return true;
+
+        LauncherProfiles.load();
+        MinecraftProfile minecraftProfile = LauncherProfiles.getCurrentProfile();
+        String selectedRuntime = Tools.getSelectedRuntime(minecraftProfile);
+        Runtime runtime = MultiRTUtils.read(selectedRuntime);
+        if (runtime.javaVersion >= versionInfo.javaVersion.majorVersion) {
+            return true;
+        }
+
+        String appropriateRuntime = MultiRTUtils.getNearestJreName(versionInfo.javaVersion.majorVersion);
+        boolean failOnMiss = false;
+        InternalRuntime internalRuntime;
+        if(appropriateRuntime == null) {
+            internalRuntime = NewJREUtil.findAppropriateInternalRuntime(versionInfo.javaVersion.majorVersion);
+            failOnMiss = true;
+        }else {
+            internalRuntime = NewJREUtil.getInternalRuntime(appropriateRuntime);
+        }
+
+        if((internalRuntime == null || !NewJREUtil.checkInternalRuntime(activity.getAssets(), internalRuntime)) && failOnMiss) {
+            showRuntimeFail(activity, versionInfo);
+            return false;
+        }
+
+        minecraftProfile.javaDir = Tools.LAUNCHERPROFILES_RTPREFIX + appropriateRuntime;
+        LauncherProfiles.write();
+        return true;
+    }
+
+    private static void showRuntimeFail(Activity activity, JMinecraftVersionList.Version verInfo) {
+        Tools.dialogOnUiThread(activity, activity.getString(R.string.global_error),
+                activity.getString(R.string.multirt_nocompartiblert, verInfo.javaVersion.majorVersion));
+    }
+
+    private enum InternalRuntime {
+        JRE_17(17, "Internal-17", "components/jre-new");
+        public final int majorVersion;
+        public final String name;
+        public final String path;
+        InternalRuntime(int majorVersion, String name, String path) {
+            this.majorVersion = majorVersion;
+            this.name = name;
+            this.path = path;
+        }
+    }
+
+}

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/multirt/MultiRTUtils.java

@@ -10,6 +10,7 @@
 
 import net.kdt.pojavlaunch.R;
 import net.kdt.pojavlaunch.Tools;
+import net.kdt.pojavlaunch.utils.MathUtils;
 
 import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
 import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
@@ -60,19 +61,9 @@ public static String getExactJreName(int majorVersion) {
 
     public static String getNearestJreName(int majorVersion) {
         List<Runtime> runtimes = getRuntimes();
-        int diff_factor = Integer.MAX_VALUE;
-        String result = null;
-        for(Runtime r : runtimes) {
-            if(r.javaVersion < majorVersion) continue; // lower - not useful
-
-            int currentFactor = r.javaVersion - majorVersion;
-            if(diff_factor > currentFactor) {
-                result = r.name;
-                diff_factor = currentFactor;
-            }
-        }
-
-        return result;
+        Runtime nearestRuntime = MathUtils.findNearestPositive(majorVersion, runtimes, (runtime)->runtime.javaVersion);
+        if(nearestRuntime == null) return null;
+        return nearestRuntime.name;
     }
 
     public static void installRuntimeNamed(String nativeLibDir, InputStream runtimeInputStream, String name) throws IOException {
@@ -120,11 +111,11 @@ public static void installRuntimeNamedBinpack(InputStream universalFileInputStre
     }
 
 
-    public static String __internal__readBinpackVersion(String name) {
-        File binpack_verfile = new File(RUNTIME_FOLDER,"/" + name + "/pojav_version");
+    public static String readInternalRuntimeVersion(String name) {
+        File versionFile = new File(RUNTIME_FOLDER,"/" + name + "/pojav_version");
         try {
-            if (binpack_verfile.exists()) {
-                return Tools.read(binpack_verfile.getAbsolutePath());
+            if (versionFile.exists()) {
+                return Tools.read(versionFile.getAbsolutePath());
             }else{
                 return null;
             }

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/tasks/AsyncAssetManager.java

@@ -31,7 +31,7 @@ private AsyncAssetManager(){}
     public static void unpackRuntime(AssetManager am) {
         /* Check if JRE is included */
         String rt_version = null;
-        String current_rt_version = MultiRTUtils.__internal__readBinpackVersion("Internal");
+        String current_rt_version = MultiRTUtils.readInternalRuntimeVersion("Internal");
         try {
             rt_version = Tools.read(am.open("components/jre/version"));
         } catch (IOException e) {

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/tasks/MinecraftDownloader.java

@@ -13,7 +13,7 @@
 import net.kdt.pojavlaunch.JAssetInfo;
 import net.kdt.pojavlaunch.JAssets;
 import net.kdt.pojavlaunch.JMinecraftVersionList;
-import net.kdt.pojavlaunch.JRE17Util;
+import net.kdt.pojavlaunch.NewJREUtil;
 import net.kdt.pojavlaunch.R;
 import net.kdt.pojavlaunch.Tools;
 import net.kdt.pojavlaunch.mirrors.DownloadMirror;
@@ -203,7 +203,7 @@ private boolean downloadAndProcessMetadata(Activity activity, JMinecraftVersionL
             throw new IOException("Unable to read Version JSON for version " + versionName);
         }
 
-        if(activity != null && !JRE17Util.installNewJreIfNeeded(activity, verInfo)){
+        if(activity != null && !NewJREUtil.installNewJreIfNeeded(activity, verInfo)){
             return false;
         }
 

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/utils/MathUtils.java

@@ -1,5 +1,7 @@
 package net.kdt.pojavlaunch.utils;
 
+import java.util.List;
+
 public class MathUtils {
 
     //Ported from https://www.arduino.cc/reference/en/language/functions/math/map/
@@ -14,4 +16,33 @@ public static float dist(float x1, float y1, float x2, float y2) {
         return (float) Math.hypot(x, y);
     }
 
+    /**
+     * Find the object T with the closest (or higher) value compared to targetValue
+     * @param targetValue the target value
+     * @param objects the list of objects that the search will be performed on
+     * @param valueProvider the provider for each values
+     * @return the object which has the closest value to targetValue, or null if values of all
+     *         objects are less than targetValue
+     * @param <T> the object type that is used for the search.
+     */
+    public static <T> T findNearestPositive(int targetValue, List<T> objects, ValueProvider<T> valueProvider) {
+        int delta = Integer.MAX_VALUE;
+        T selectedObject = null;
+        for(T object : objects) {
+            int objectValue = valueProvider.getValue(object);
+            if(objectValue < targetValue) continue;
+
+            int currentDelta = objectValue - targetValue;
+            if(currentDelta == 0) return object;
+            if(currentDelta >= delta) continue;
+
+            selectedObject = object;
+            delta = currentDelta;
+        }
+        return selectedObject;
+    }
+
+    public interface ValueProvider<T> {
+        int getValue(T object);
+    }
 }