Address remaining scoped storage regressions

- Accelerate common path used to check the storage scope for a given path
- Update the logic for the `get_as_text()` method - previous logic loads the content of a text file one byte at a time

4 files changed, 33 insertions, 31 deletions

diff --git a/platform/android/java/lib/src/org/godotengine/godot/io/StorageScope.kt b/platform/android/java/lib/src/org/godotengine/godot/io/StorageScope.kt
index c7bd55b620..c9282dd247 100644
--- a/platform/android/java/lib/src/org/godotengine/godot/io/StorageScope.kt
+++ b/platform/android/java/lib/src/org/godotengine/godot/io/StorageScope.kt
@@ -54,11 +54,19 @@ internal enum class StorageScope {
 	 */
 	UNKNOWN;
 
-	companion object {
+	class Identifier(context: Context) {
+
+		private val internalAppDir: String? = context.filesDir.canonicalPath
+		private val internalCacheDir: String? = context.cacheDir.canonicalPath
+		private val externalAppDir: String? = context.getExternalFilesDir(null)?.canonicalPath
+		private val sharedDir : String? = Environment.getExternalStorageDirectory().canonicalPath
+		private val downloadsSharedDir: String? = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).canonicalPath
+		private val documentsSharedDir: String? = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS).canonicalPath
+
 		/**
 		 * Determines which [StorageScope] the given path falls under.
 		 */
-		fun getStorageScope(context: Context, path: String?): StorageScope {
+		fun identifyStorageScope(path: String?): StorageScope {
 			if (path == null) {
 				return UNKNOWN
 			}
@@ -70,23 +78,19 @@ internal enum class StorageScope {
 
 			val canonicalPathFile = pathFile.canonicalPath
 
-			val internalAppDir = context.filesDir.canonicalPath ?: return UNKNOWN
-			if (canonicalPathFile.startsWith(internalAppDir)) {
+			if (internalAppDir != null && canonicalPathFile.startsWith(internalAppDir)) {
 				return APP
 			}
 
-			val internalCacheDir = context.cacheDir.canonicalPath ?: return UNKNOWN
-			if (canonicalPathFile.startsWith(internalCacheDir)) {
+			if (internalCacheDir != null && canonicalPathFile.startsWith(internalCacheDir)) {
 				return APP
 			}
 
-			val externalAppDir = context.getExternalFilesDir(null)?.canonicalPath ?: return UNKNOWN
-			if (canonicalPathFile.startsWith(externalAppDir)) {
+			if (externalAppDir != null && canonicalPathFile.startsWith(externalAppDir)) {
 				return APP
 			}
 
-			val sharedDir =	Environment.getExternalStorageDirectory().canonicalPath ?: return UNKNOWN
-			if (canonicalPathFile.startsWith(sharedDir)) {
+			if (sharedDir != null && canonicalPathFile.startsWith(sharedDir)) {
 				if (Build.VERSION.SDK_INT < Build.VERSION_CODES.R) {
 					// Before R, apps had access to shared storage so long as they have the right
 					// permissions (and flag on Q).
@@ -95,13 +99,8 @@ internal enum class StorageScope {
 
 				// Post R, access is limited based on the target destination
 				// 'Downloads' and 'Documents' are still accessible
-				val downloadsSharedDir =
-					Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).canonicalPath
-						?: return SHARED
-				val documentsSharedDir =
-					Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS).canonicalPath
-						?: return SHARED
-				if (canonicalPathFile.startsWith(downloadsSharedDir) || canonicalPathFile.startsWith(documentsSharedDir)) {
+				if ((downloadsSharedDir != null && canonicalPathFile.startsWith(downloadsSharedDir))
+					|| (documentsSharedDir != null && canonicalPathFile.startsWith(documentsSharedDir))) {
 					return APP
 				}
 
diff --git a/platform/android/java/lib/src/org/godotengine/godot/io/directory/FilesystemDirectoryAccess.kt b/platform/android/java/lib/src/org/godotengine/godot/io/directory/FilesystemDirectoryAccess.kt
index c3acf42568..54fc56fa3e 100644
--- a/platform/android/java/lib/src/org/godotengine/godot/io/directory/FilesystemDirectoryAccess.kt
+++ b/platform/android/java/lib/src/org/godotengine/godot/io/directory/FilesystemDirectoryAccess.kt
@@ -54,6 +54,7 @@ internal class FilesystemDirectoryAccess(private val context: Context):
 
 	private data class DirData(val dirFile: File, val files: Array<File>, var current: Int = 0)
 
+	private val storageScopeIdentifier = StorageScope.Identifier(context)
 	private val storageManager = context.getSystemService(Context.STORAGE_SERVICE) as StorageManager
 	private var lastDirId = STARTING_DIR_ID
 	private val dirs = SparseArray<DirData>()
@@ -62,7 +63,7 @@ internal class FilesystemDirectoryAccess(private val context: Context):
 		// Directory access is available for shared storage on Android 11+
 		// On Android 10, access is also available as long as the `requestLegacyExternalStorage`
 		// tag is available.
-		return StorageScope.getStorageScope(context, path) != StorageScope.UNKNOWN
+		return storageScopeIdentifier.identifyStorageScope(path) != StorageScope.UNKNOWN
 	}
 
 	override fun hasDirId(dirId: Int) = dirs.indexOfKey(dirId) >= 0
@@ -102,7 +103,7 @@ internal class FilesystemDirectoryAccess(private val context: Context):
 		}
 	}
 
-	override fun fileExists(path: String) = FileAccessHandler.fileExists(context, path)
+	override fun fileExists(path: String) = FileAccessHandler.fileExists(context, storageScopeIdentifier, path)
 
 	override fun dirNext(dirId: Int): String {
 		val dirData = dirs[dirId]
@@ -199,7 +200,7 @@ internal class FilesystemDirectoryAccess(private val context: Context):
 			if (fromFile.isDirectory) {
 				fromFile.renameTo(File(to))
 			} else {
-				FileAccessHandler.renameFile(context, from, to)
+				FileAccessHandler.renameFile(context, storageScopeIdentifier, from, to)
 			}
 		} catch (e: SecurityException) {
 			false
@@ -218,7 +219,7 @@ internal class FilesystemDirectoryAccess(private val context: Context):
 				if (deleteFile.isDirectory) {
 					deleteFile.delete()
 				} else {
-					FileAccessHandler.removeFile(context, filename)
+					FileAccessHandler.removeFile(context, storageScopeIdentifier, filename)
 				}
 			} else {
 				true
diff --git a/platform/android/java/lib/src/org/godotengine/godot/io/file/DataAccess.kt b/platform/android/java/lib/src/org/godotengine/godot/io/file/DataAccess.kt
index aef1bed8ce..463dabfb23 100644
--- a/platform/android/java/lib/src/org/godotengine/godot/io/file/DataAccess.kt
+++ b/platform/android/java/lib/src/org/godotengine/godot/io/file/DataAccess.kt
@@ -161,8 +161,9 @@ internal abstract class DataAccess(private val filePath: String) {
 	fun read(buffer: ByteBuffer): Int {
 		return try {
 			val readBytes = fileChannel.read(buffer)
+			endOfFile = readBytes == -1
+					|| (fileChannel.position() >= fileChannel.size() && fileChannel.size() > 0)
 			if (readBytes == -1) {
-				endOfFile = true
 				0
 			} else {
 				readBytes
diff --git a/platform/android/java/lib/src/org/godotengine/godot/io/file/FileAccessHandler.kt b/platform/android/java/lib/src/org/godotengine/godot/io/file/FileAccessHandler.kt
index a4e0a82d6e..04b6772c45 100644
--- a/platform/android/java/lib/src/org/godotengine/godot/io/file/FileAccessHandler.kt
+++ b/platform/android/java/lib/src/org/godotengine/godot/io/file/FileAccessHandler.kt
@@ -49,8 +49,8 @@ class FileAccessHandler(val context: Context) {
 		private const val INVALID_FILE_ID = 0
 		private const val STARTING_FILE_ID = 1
 
-		fun fileExists(context: Context, path: String?): Boolean {
-			val storageScope = StorageScope.getStorageScope(context, path)
+		internal fun fileExists(context: Context, storageScopeIdentifier: StorageScope.Identifier, path: String?): Boolean {
+			val storageScope = storageScopeIdentifier.identifyStorageScope(path)
 			if (storageScope == StorageScope.UNKNOWN) {
 				return false
 			}
@@ -62,8 +62,8 @@ class FileAccessHandler(val context: Context) {
 			}
 		}
 
-		fun removeFile(context: Context, path: String?): Boolean {
-			val storageScope = StorageScope.getStorageScope(context, path)
+		internal fun removeFile(context: Context, storageScopeIdentifier: StorageScope.Identifier, path: String?): Boolean {
+			val storageScope = storageScopeIdentifier.identifyStorageScope(path)
 			if (storageScope == StorageScope.UNKNOWN) {
 				return false
 			}
@@ -75,8 +75,8 @@ class FileAccessHandler(val context: Context) {
 			}
 		}
 
-		fun renameFile(context: Context, from: String?, to: String?): Boolean {
-			val storageScope = StorageScope.getStorageScope(context, from)
+		internal fun renameFile(context: Context, storageScopeIdentifier: StorageScope.Identifier, from: String?, to: String?): Boolean {
+			val storageScope = storageScopeIdentifier.identifyStorageScope(from)
 			if (storageScope == StorageScope.UNKNOWN) {
 				return false
 			}
@@ -89,13 +89,14 @@ class FileAccessHandler(val context: Context) {
 		}
 	}
 
+	private val storageScopeIdentifier = StorageScope.Identifier(context)
 	private val files = SparseArray<DataAccess>()
 	private var lastFileId = STARTING_FILE_ID
 
 	private fun hasFileId(fileId: Int) = files.indexOfKey(fileId) >= 0
 
 	fun fileOpen(path: String?, modeFlags: Int): Int {
-		val storageScope = StorageScope.getStorageScope(context, path)
+		val storageScope = storageScopeIdentifier.identifyStorageScope(path)
 		if (storageScope == StorageScope.UNKNOWN) {
 			return INVALID_FILE_ID
 		}
@@ -162,10 +163,10 @@ class FileAccessHandler(val context: Context) {
 		files[fileId].flush()
 	}
 
-	fun fileExists(path: String?) = Companion.fileExists(context, path)
+	fun fileExists(path: String?) = Companion.fileExists(context, storageScopeIdentifier, path)
 
 	fun fileLastModified(filepath: String?): Long {
-		val storageScope = StorageScope.getStorageScope(context, filepath)
+		val storageScope = storageScopeIdentifier.identifyStorageScope(filepath)
 		if (storageScope == StorageScope.UNKNOWN) {
 			return 0L
 		}