Image swipe

app/build.gradle

@@ -15,7 +15,7 @@ android {
         minSdkVersion 21
         targetSdkVersion 29
         versionCode 1
-        versionName "1.1.1"
+        versionName "1.1.2"
 
         ndk {
             abiFilters 'x86_64', 'armeabi-v7a', 'arm64-v8a'

app/src/main/java/sushi/hardcore/droidfs/ChangePasswordActivity.kt

@@ -121,7 +121,7 @@ class ChangePasswordActivity : BaseActivity() {
                         }
                     }
                     if (changePasswordImmediately){
-                        if (GocryptfsVolume.change_password(rootCipherDir, oldPassword, givenHash, newPassword, returnedHash)) {
+                        if (GocryptfsVolume.changePassword(rootCipherDir, oldPassword, givenHash, newPassword, returnedHash)) {
                             val editor = sharedPrefs.edit()
                             if (sharedPrefs.getString(rootCipherDir, null) != null){
                                 editor.remove(rootCipherDir)

app/src/main/java/sushi/hardcore/droidfs/CreateActivity.kt

@@ -91,7 +91,7 @@ class CreateActivity : BaseActivity() {
                         }
                     }
                     if (goodDirectory) {
-                        if (GocryptfsVolume.create_volume(rootCipherDir, password, GocryptfsVolume.ScryptDefaultLogN, ConstValues.creator)) {
+                        if (GocryptfsVolume.createVolume(rootCipherDir, password, GocryptfsVolume.ScryptDefaultLogN, ConstValues.creator)) {
                             var returnedHash: ByteArray? = null
                             if (usf_fingerprint && checkbox_save_password.isChecked){
                                 returnedHash = ByteArray(GocryptfsVolume.KeyLen)

app/src/main/java/sushi/hardcore/droidfs/explorers/BaseExplorerActivity.kt

@@ -167,7 +167,7 @@ open class BaseExplorerActivity : BaseActivity() {
     }
 
     protected fun setCurrentPath(path: String) {
-        explorerElements = gocryptfsVolume.list_dir(path)
+        explorerElements = gocryptfsVolume.listDir(path)
         text_dir_empty.visibility = if (explorerElements.size == 0) View.VISIBLE else View.INVISIBLE
         sortExplorerElements()
         if (path.isNotEmpty()) { //not root

app/src/main/java/sushi/hardcore/droidfs/explorers/ExplorerActivity.kt

@@ -44,7 +44,7 @@ class ExplorerActivity : BaseExplorerActivity() {
         if (fileName.isEmpty()) {
             Toast.makeText(this, R.string.error_filename_empty, Toast.LENGTH_SHORT).show()
         } else {
-            val handleID = gocryptfsVolume.open_write_mode(PathUtils.path_join(currentDirectoryPath, fileName))
+            val handleID = gocryptfsVolume.openWriteMode(PathUtils.path_join(currentDirectoryPath, fileName))
             if (handleID == -1) {
                 ColoredAlertDialogBuilder(this)
                     .setTitle(R.string.error)
@@ -52,7 +52,7 @@ class ExplorerActivity : BaseExplorerActivity() {
                     .setPositiveButton(R.string.ok, null)
                     .show()
             } else {
-                gocryptfsVolume.close_file(handleID)
+                gocryptfsVolume.closeFile(handleID)
                 setCurrentPath(currentDirectoryPath)
                 invalidateOptionsMenu()
             }
@@ -120,7 +120,7 @@ class ExplorerActivity : BaseExplorerActivity() {
                         for (uri in uris) {
                             val dstPath = PathUtils.path_join(currentDirectoryPath, PathUtils.getFilenameFromURI(activity, uri))
                             contentResolver.openInputStream(uri)?.let {
-                                success = gocryptfsVolume.import_file(it, dstPath)
+                                success = gocryptfsVolume.importFile(it, dstPath)
                             }
                             if (!success) {
                                 stopTask {
@@ -194,7 +194,7 @@ class ExplorerActivity : BaseExplorerActivity() {
                             failedItem = if (element.isDirectory) {
                                 recursiveExportDirectory(fullPath, outputDir)
                             } else {
-                                if (gocryptfsVolume.export_file(fullPath, PathUtils.path_join(outputDir, element.name))) null else fullPath
+                                if (gocryptfsVolume.exportFile(fullPath, PathUtils.path_join(outputDir, element.name))) null else fullPath
                             }
                             if (failedItem != null) {
                                 stopTask {
@@ -400,18 +400,6 @@ class ExplorerActivity : BaseExplorerActivity() {
         }
     }
 
-    private fun recursiveMapFiles(rootPath: String): MutableList<ExplorerElement> {
-        val result = mutableListOf<ExplorerElement>()
-        val explorerElements = gocryptfsVolume.list_dir(rootPath)
-        result.addAll(explorerElements)
-        for (e in explorerElements){
-            if (e.isDirectory){
-                result.addAll(recursiveMapFiles(e.getFullPath()))
-            }
-        }
-        return result
-    }
-
     private fun cancelCopy() {
         if (modeSelectLocation){
             modeSelectLocation = false
@@ -424,15 +412,15 @@ class ExplorerActivity : BaseExplorerActivity() {
 
     private fun copyFile(srcPath: String, dstPath: String): Boolean {
         var success = true
-        val originalHandleId = gocryptfsVolume.open_read_mode(srcPath)
+        val originalHandleId = gocryptfsVolume.openReadMode(srcPath)
         if (originalHandleId != -1){
-            val newHandleId = gocryptfsVolume.open_write_mode(dstPath)
+            val newHandleId = gocryptfsVolume.openWriteMode(dstPath)
             if (newHandleId != -1){
                 var offset: Long = 0
                 val ioBuffer = ByteArray(GocryptfsVolume.DefaultBS)
                 var length: Int
-                while (gocryptfsVolume.read_file(originalHandleId, offset, ioBuffer).also { length = it } > 0) {
+                while (gocryptfsVolume.readFile(originalHandleId, offset, ioBuffer).also { length = it } > 0) {
-                    val written = gocryptfsVolume.write_file(newHandleId, offset, ioBuffer, length).toLong()
+                    val written = gocryptfsVolume.writeFile(newHandleId, offset, ioBuffer, length).toLong()
                     if (written == length.toLong()) {
                         offset += written
                     } else {
@@ -440,11 +428,11 @@ class ExplorerActivity : BaseExplorerActivity() {
                         break
                     }
                 }
-                gocryptfsVolume.close_file(newHandleId)
+                gocryptfsVolume.closeFile(newHandleId)
             } else {
                 success = false
             }
-            gocryptfsVolume.close_file(originalHandleId)
+            gocryptfsVolume.closeFile(originalHandleId)
         } else {
             success = false
         }
@@ -452,9 +440,9 @@ class ExplorerActivity : BaseExplorerActivity() {
     }
 
     private fun recursiveCopyDirectory(srcDirectoryPath: String, outputPath: String): String? {
-        val mappedElements = recursiveMapFiles(srcDirectoryPath)
+        val mappedElements = gocryptfsVolume.recursiveMapFiles(srcDirectoryPath)
         val dstDirectoryPath = PathUtils.path_join(outputPath, File(srcDirectoryPath).name)
-        if (!gocryptfsVolume.path_exists(dstDirectoryPath)) {
+        if (!gocryptfsVolume.pathExists(dstDirectoryPath)) {
             if (!gocryptfsVolume.mkdir(dstDirectoryPath)) {
                 return dstDirectoryPath
             }
@@ -477,15 +465,15 @@ class ExplorerActivity : BaseExplorerActivity() {
 
     private fun importFileFromOtherVolume(remote_gocryptfsVolume: GocryptfsVolume, srcPath: String, dstPath: String): Boolean {
         var success = true
-        val srcHandleID = remote_gocryptfsVolume.open_read_mode(srcPath)
+        val srcHandleID = remote_gocryptfsVolume.openReadMode(srcPath)
         if (srcHandleID != -1) {
-            val dstHandleID = gocryptfsVolume.open_write_mode(dstPath)
+            val dstHandleID = gocryptfsVolume.openWriteMode(dstPath)
             if (dstHandleID != -1) {
                 var length: Int
                 val ioBuffer = ByteArray(GocryptfsVolume.DefaultBS)
                 var offset: Long = 0
-                while (remote_gocryptfsVolume.read_file(srcHandleID, offset, ioBuffer).also { length = it } > 0){
+                while (remote_gocryptfsVolume.readFile(srcHandleID, offset, ioBuffer).also { length = it } > 0){
-                    val written = gocryptfsVolume.write_file(dstHandleID, offset, ioBuffer, length).toLong()
+                    val written = gocryptfsVolume.writeFile(dstHandleID, offset, ioBuffer, length).toLong()
                     if (written == length.toLong()) {
                         offset += length.toLong()
                     } else {
@@ -493,17 +481,17 @@ class ExplorerActivity : BaseExplorerActivity() {
                         break
                     }
                 }
-                gocryptfsVolume.close_file(dstHandleID)
+                gocryptfsVolume.closeFile(dstHandleID)
             }
-            remote_gocryptfsVolume.close_file(srcHandleID)
+            remote_gocryptfsVolume.closeFile(srcHandleID)
         }
         return success
     }
 
     private fun recursiveImportDirectoryFromOtherVolume(remote_gocryptfsVolume: GocryptfsVolume, remote_directory_path: String, outputPath: String): String? {
-        val mappedElements = recursiveMapFiles(remote_directory_path)
+        val mappedElements = gocryptfsVolume.recursiveMapFiles(remote_directory_path)
         val dstDirectoryPath = PathUtils.path_join(outputPath, File(remote_directory_path).name)
-        if (!gocryptfsVolume.path_exists(dstDirectoryPath)) {
+        if (!gocryptfsVolume.pathExists(dstDirectoryPath)) {
             if (!gocryptfsVolume.mkdir(dstDirectoryPath)) {
                 return dstDirectoryPath
             }
@@ -526,14 +514,14 @@ class ExplorerActivity : BaseExplorerActivity() {
 
     private fun recursiveExportDirectory(plain_directory_path: String, output_dir: String?): String? {
         if (File(PathUtils.path_join(output_dir, plain_directory_path)).mkdir()) {
-            val explorerElements = gocryptfsVolume.list_dir(plain_directory_path)
+            val explorerElements = gocryptfsVolume.listDir(plain_directory_path)
             for (e in explorerElements) {
                 val fullPath = PathUtils.path_join(plain_directory_path, e.name)
                 if (e.isDirectory) {
                     val failedItem = recursiveExportDirectory(fullPath, output_dir)
                     failedItem?.let { return it }
                 } else {
-                    if (!gocryptfsVolume.export_file(fullPath, PathUtils.path_join(output_dir, fullPath))) {
+                    if (!gocryptfsVolume.exportFile(fullPath, PathUtils.path_join(output_dir, fullPath))) {
                         return fullPath
                     }
                 }
@@ -544,14 +532,14 @@ class ExplorerActivity : BaseExplorerActivity() {
     }
 
     private fun recursiveRemoveDirectory(plain_directory_path: String): String? {
-        val explorerElements = gocryptfsVolume.list_dir(plain_directory_path)
+        val explorerElements = gocryptfsVolume.listDir(plain_directory_path)
         for (e in explorerElements) {
             val fullPath = PathUtils.path_join(plain_directory_path, e.name)
             if (e.isDirectory) {
                 val result = recursiveRemoveDirectory(fullPath)
                 result?.let { return it }
             } else {
-                if (!gocryptfsVolume.remove_file(fullPath)) {
+                if (!gocryptfsVolume.removeFile(fullPath)) {
                     return fullPath
                 }
             }
@@ -572,7 +560,7 @@ class ExplorerActivity : BaseExplorerActivity() {
                 val result = recursiveRemoveDirectory(fullPath)
                 result?.let{ failedItem = it }
             } else {
-                if (!gocryptfsVolume.remove_file(fullPath)) {
+                if (!gocryptfsVolume.removeFile(fullPath)) {
                     failedItem = fullPath
                 }
             }

app/src/main/java/sushi/hardcore/droidfs/explorers/ExplorerActivityDrop.kt

@@ -2,7 +2,6 @@ package sushi.hardcore.droidfs.explorers
 
 import android.content.Intent
 import android.net.Uri
-import android.util.Log
 import android.view.Menu
 import android.view.MenuItem
 import sushi.hardcore.droidfs.R
@@ -33,13 +32,13 @@ class ExplorerActivityDrop : BaseExplorerActivity() {
                     if (intent.action == Intent.ACTION_SEND) {
                         val uri = intent.getParcelableExtra<Uri>(Intent.EXTRA_STREAM)
                         val outputPath = PathUtils.path_join(currentDirectoryPath, PathUtils.getFilenameFromURI(this, uri))
-                        errorMsg = if (gocryptfsVolume.import_file(this, uri, outputPath)) null else getString(R.string.import_failed, outputPath)
+                        errorMsg = if (gocryptfsVolume.importFile(this, uri, outputPath)) null else getString(R.string.import_failed, outputPath)
                     } else if (intent.action == Intent.ACTION_SEND_MULTIPLE) {
                         val uris = intent.getParcelableArrayListExtra<Uri>(Intent.EXTRA_STREAM)
                         if (uris != null){
                             for (uri in uris) {
                                 val outputPath = PathUtils.path_join(currentDirectoryPath, PathUtils.getFilenameFromURI(this, uri))
-                                if (!gocryptfsVolume.import_file(this, uri, outputPath)) {
+                                if (!gocryptfsVolume.importFile(this, uri, outputPath)) {
                                     errorMsg = getString(R.string.import_failed, outputPath)
                                     break
                                 }

app/src/main/java/sushi/hardcore/droidfs/file_viewers/FileViewerActivity.kt

@@ -29,21 +29,21 @@ abstract class FileViewerActivity: BaseActivity() {
     }
     abstract fun viewFile()
     fun loadWholeFile(path: String): ByteArray? {
-        val fileSize = gocryptfsVolume.get_size(path)
+        val fileSize = gocryptfsVolume.getSize(path)
         if (fileSize >= 0){
             try {
                 val fileBuff = ByteArray(fileSize.toInt())
                 var success = false
-                val handleID = gocryptfsVolume.open_read_mode(path)
+                val handleID = gocryptfsVolume.openReadMode(path)
                 if (handleID != -1) {
                     var offset: Long = 0
                     val ioBuffer = ByteArray(GocryptfsVolume.DefaultBS)
                     var length: Int
-                    while (gocryptfsVolume.read_file(handleID, offset, ioBuffer).also { length = it } > 0){
+                    while (gocryptfsVolume.readFile(handleID, offset, ioBuffer).also { length = it } > 0){
                         System.arraycopy(ioBuffer, 0, fileBuff, offset.toInt(), length)
                         offset += length.toLong()
                     }
-                    gocryptfsVolume.close_file(handleID)
+                    gocryptfsVolume.closeFile(handleID)
                     success = offset == fileBuff.size.toLong()
                 }
                 if (success){

app/src/main/java/sushi/hardcore/droidfs/file_viewers/GocryptfsDataSource.kt

@@ -15,8 +15,8 @@ class GocryptfsDataSource(private val gocryptfsVolume: GocryptfsVolume, private
         dataSpec?.let {
             fileOffset = dataSpec.position
         }
-        handleID = gocryptfsVolume.open_read_mode(filePath)
+        handleID = gocryptfsVolume.openReadMode(filePath)
-        fileSize = gocryptfsVolume.get_size(filePath)
+        fileSize = gocryptfsVolume.getSize(filePath)
         return fileSize
     }
 
@@ -25,7 +25,7 @@ class GocryptfsDataSource(private val gocryptfsVolume: GocryptfsVolume, private
     }
 
     override fun close() {
-        gocryptfsVolume.close_file(handleID)
+        gocryptfsVolume.closeFile(handleID)
     }
 
     override fun addTransferListener(transferListener: TransferListener?) {
@@ -44,7 +44,7 @@ class GocryptfsDataSource(private val gocryptfsVolume: GocryptfsVolume, private
             } else {
                 ByteArray(tmpReadLength)
             }
-            val read =  gocryptfsVolume.read_file(handleID, fileOffset, tmpBuff)
+            val read =  gocryptfsVolume.readFile(handleID, fileOffset, tmpBuff)
             System.arraycopy(tmpBuff, 0, buffer, offset+totalRead, read)
             fileOffset += read
             totalRead += read

app/src/main/java/sushi/hardcore/droidfs/file_viewers/ImageViewer.kt

@@ -4,20 +4,30 @@ import android.graphics.Bitmap
 import android.graphics.Matrix
 import android.graphics.drawable.Drawable
 import android.os.Handler
+import android.view.MotionEvent
 import android.view.View
 import com.bumptech.glide.Glide
 import com.bumptech.glide.RequestBuilder
 import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool
 import com.bumptech.glide.load.resource.bitmap.BitmapTransformation
 import kotlinx.android.synthetic.main.activity_image_viewer.*
+import sushi.hardcore.droidfs.ConstValues
 import sushi.hardcore.droidfs.R
+import sushi.hardcore.droidfs.util.PathUtils
 import java.security.MessageDigest
+import kotlin.math.abs
 
 class ImageViewer: FileViewerActivity() {
     companion object {
         private const val hideDelay: Long = 3000
+        private const val MIN_SWIPE_DISTANCE = 150
     }
     private lateinit var glideImage: RequestBuilder<Drawable>
+    private var x1 = 0F
+    private var x2 = 0F
+    private val mappedImages = mutableListOf<String>()
+    private var wasMapped = false
+    private var currentMappedImageIndex = -1
     private var rotationAngle: Float = 0F
     private val handler = Handler()
     private val hideActionButtons = Runnable { action_buttons.visibility = View.GONE }
@@ -31,6 +41,50 @@ class ImageViewer: FileViewerActivity() {
         }
     }
 
+    override fun dispatchTouchEvent(event: MotionEvent?): Boolean {
+        if (!image_viewer.isZoomed){
+            when(event?.action){
+                MotionEvent.ACTION_DOWN -> {
+                    x1 = event.x
+                }
+                MotionEvent.ACTION_UP -> {
+                    x2 = event.x
+                    val deltaX = x2 - x1
+                    if (abs(deltaX) > MIN_SWIPE_DISTANCE){
+                        if (!wasMapped){
+                            for (e in gocryptfsVolume.recursiveMapFiles(PathUtils.getParentPath(filePath))){
+                                if (e.isRegularFile && ConstValues.isImage(e.name)){
+                                    mappedImages.add(e.getFullPath())
+                                }
+                            }
+                            mappedImages.sortWith(Comparator { p1, p2 -> p1.compareTo(p2) })
+                            currentMappedImageIndex = mappedImages.indexOf(filePath)
+                            wasMapped = true
+                        }
+                        if (deltaX < 0){
+                            if (currentMappedImageIndex == mappedImages.size-1){
+                                currentMappedImageIndex = 0
+                            } else {
+                                currentMappedImageIndex += 1
+                            }
+                        } else {
+                            if (currentMappedImageIndex == 0){
+                                currentMappedImageIndex = mappedImages.size-1
+                            } else {
+                                currentMappedImageIndex -= 1
+                            }
+                        }
+                        loadWholeFile(mappedImages[currentMappedImageIndex])?.let {
+                            glideImage = Glide.with(this).load(it)
+                            glideImage.into(image_viewer)
+                        }
+                    }
+                }
+            }
+        }
+        return super.dispatchTouchEvent(event)
+    }
+
     class RotateTransformation(private val rotationAngle: Float): BitmapTransformation() {
 
         override fun transform(pool: BitmapPool, toTransform: Bitmap, outWidth: Int, outHeight: Int): Bitmap {
@@ -45,6 +99,7 @@ class ImageViewer: FileViewerActivity() {
     }
 
     private fun rotateImage(){
+        image_viewer.restoreZoomNormal()
         glideImage.transform(RotateTransformation(rotationAngle)).into(image_viewer)
     }
     fun onCLickRotateRight(view: View){

app/src/main/java/sushi/hardcore/droidfs/file_viewers/TextEditor.kt

@@ -68,14 +68,14 @@ class TextEditor: FileViewerActivity() {
     private fun save(): Boolean{
         var success = false
         val content = editor.text.toString().toByteArray()
-        val handleID = gocryptfsVolume.open_write_mode(filePath)
+        val handleID = gocryptfsVolume.openWriteMode(filePath)
         if (handleID != -1){
             val buff = ByteArrayInputStream(content)
             var offset: Long = 0
             val io_buffer = ByteArray(GocryptfsVolume.DefaultBS)
             var length: Int
             while (buff.read(io_buffer).also { length = it } > 0) {
-                val written = gocryptfsVolume.write_file(handleID, offset, io_buffer, length).toLong()
+                val written = gocryptfsVolume.writeFile(handleID, offset, io_buffer, length).toLong()
                 if (written == length.toLong()) {
                     offset += written
                 } else {
@@ -85,7 +85,7 @@ class TextEditor: FileViewerActivity() {
             if (offset == content.size.toLong()){
                 success = gocryptfsVolume.truncate(filePath, offset)
             }
-            gocryptfsVolume.close_file(handleID)
+            gocryptfsVolume.closeFile(handleID)
             buff.close()
         }
         if (success){

app/src/main/java/sushi/hardcore/droidfs/util/ExternalProvider.kt

@@ -34,7 +34,7 @@ object ExternalProvider {
         val tmpFileUri = RestrictedFileProvider.newFile(fileName)
         if (tmpFileUri != null){
             storedFiles.add(tmpFileUri)
-            if (gocryptfsVolume.export_file(context, file_path, tmpFileUri)) {
+            if (gocryptfsVolume.exportFile(context, file_path, tmpFileUri)) {
                 return Pair(tmpFileUri, getContentType(fileName, previous_content_type))
             }
         }

app/src/main/java/sushi/hardcore/droidfs/util/GocryptfsVolume.kt

@@ -25,9 +25,9 @@ class GocryptfsVolume(var sessionID: Int) {
         const val KeyLen = 32
         const val ScryptDefaultLogN = 16
         const val DefaultBS = 4096
-        external fun create_volume(root_cipher_dir: String, password: CharArray, logN: Int, creator: String): Boolean
+        external fun createVolume(root_cipher_dir: String, password: CharArray, logN: Int, creator: String): Boolean
         external fun init(root_cipher_dir: String, password: CharArray?, givenHash: ByteArray?, returnedHash: ByteArray?): Int
-        external fun change_password(root_cipher_dir: String, old_password: CharArray?, givenHash: ByteArray?, new_password: CharArray, returnedHash: ByteArray?): Boolean
+        external fun changePassword(root_cipher_dir: String, old_password: CharArray?, givenHash: ByteArray?, new_password: CharArray, returnedHash: ByteArray?): Boolean
 
         init {
             System.loadLibrary("gocryptfs_jni")
@@ -38,7 +38,7 @@ class GocryptfsVolume(var sessionID: Int) {
         native_close(sessionID)
     }
 
-    fun list_dir(dir_path: String): MutableList<ExplorerElement> {
+    fun listDir(dir_path: String): MutableList<ExplorerElement> {
         return native_list_dir(sessionID, dir_path)
     }
 
@@ -50,35 +50,35 @@ class GocryptfsVolume(var sessionID: Int) {
         return native_rmdir(sessionID, dir_path)
     }
 
-    fun remove_file(file_path: String): Boolean {
+    fun removeFile(file_path: String): Boolean {
         return native_remove_file(sessionID, file_path)
     }
 
-    fun path_exists(file_path: String): Boolean {
+    fun pathExists(file_path: String): Boolean {
         return native_path_exists(sessionID, file_path)
     }
 
-    fun get_size(file_path: String): Long {
+    fun getSize(file_path: String): Long {
         return native_get_size(sessionID, file_path)
     }
 
-    fun close_file(handleID: Int) {
+    fun closeFile(handleID: Int) {
         native_close_file(sessionID, handleID)
     }
 
-    fun open_read_mode(file_path: String): Int {
+    fun openReadMode(file_path: String): Int {
         return native_open_read_mode(sessionID, file_path)
     }
 
-    fun open_write_mode(file_path: String): Int {
+    fun openWriteMode(file_path: String): Int {
         return native_open_write_mode(sessionID, file_path)
     }
 
-    fun read_file(handleID: Int, offset: Long, buff: ByteArray): Int {
+    fun readFile(handleID: Int, offset: Long, buff: ByteArray): Int {
         return native_read_file(sessionID, handleID, offset, buff)
     }
 
-    fun write_file(handleID: Int, offset: Long, buff: ByteArray, buff_size: Int): Int {
+    fun writeFile(handleID: Int, offset: Long, buff: ByteArray, buff_size: Int): Int {
         return native_write_file(sessionID, handleID, offset, buff, buff_size)
     }
 
@@ -90,7 +90,7 @@ class GocryptfsVolume(var sessionID: Int) {
         return native_rename(sessionID, old_path, new_path)
     }
 
-    fun export_file(handleID: Int, os: OutputStream): Boolean {
+    fun exportFile(handleID: Int, os: OutputStream): Boolean {
         var offset: Long = 0
         val ioBuffer = ByteArray(DefaultBS)
         var length: Int
@@ -102,29 +102,29 @@ class GocryptfsVolume(var sessionID: Int) {
         return true
     }
 
-    fun export_file(src_path: String, os: OutputStream): Boolean {
+    fun exportFile(src_path: String, os: OutputStream): Boolean {
         var success = false
-        val srcHandleId = open_read_mode(src_path)
+        val srcHandleId = openReadMode(src_path)
         if (srcHandleId != -1) {
-            success = export_file(srcHandleId, os)
+            success = exportFile(srcHandleId, os)
-            close_file(srcHandleId)
+            closeFile(srcHandleId)
         }
         return success
     }
 
-    fun export_file(src_path: String, dst_path: String): Boolean {
+    fun exportFile(src_path: String, dst_path: String): Boolean {
-        return export_file(src_path, FileOutputStream(dst_path))
+        return exportFile(src_path, FileOutputStream(dst_path))
     }
 
-    fun export_file(context: Context, src_path: String, output_path: Uri): Boolean {
+    fun exportFile(context: Context, src_path: String, output_path: Uri): Boolean {
         val os = context.contentResolver.openOutputStream(output_path)
         if (os != null){
-            return export_file(src_path, os)
+            return exportFile(src_path, os)
         }
         return false
     }
 
-    fun import_file(inputStream: InputStream, handleID: Int): Boolean {
+    fun importFile(inputStream: InputStream, handleID: Int): Boolean {
         var offset: Long = 0
         val ioBuffer = ByteArray(DefaultBS)
         var length: Int
@@ -142,22 +142,33 @@ class GocryptfsVolume(var sessionID: Int) {
         return true
     }
 
-    fun import_file(inputStream: InputStream, dst_path: String): Boolean {
+    fun importFile(inputStream: InputStream, dst_path: String): Boolean {
         var success = false
-        val dstHandleId = open_write_mode(dst_path)
+        val dstHandleId = openWriteMode(dst_path)
         if (dstHandleId != -1) {
-            success = import_file(inputStream, dstHandleId)
+            success = importFile(inputStream, dstHandleId)
-            close_file(dstHandleId)
+            closeFile(dstHandleId)
         }
         return success
     }
 
-    fun import_file(context: Context, src_uri: Uri, dst_path: String): Boolean {
+    fun importFile(context: Context, src_uri: Uri, dst_path: String): Boolean {
         val inputStream = context.contentResolver.openInputStream(src_uri)
         if (inputStream != null){
-            return import_file(inputStream, dst_path)
+            return importFile(inputStream, dst_path)
         }
         return false
     }
 
+    fun recursiveMapFiles(rootPath: String): MutableList<ExplorerElement> {
+        val result = mutableListOf<ExplorerElement>()
+        val explorerElements = listDir(rootPath)
+        result.addAll(explorerElements)
+        for (e in explorerElements){
+            if (e.isDirectory){
+                result.addAll(recursiveMapFiles(e.getFullPath()))
+            }
+        }
+        return result
+    }
 }

app/src/main/java/sushi/hardcore/droidfs/widgets/ZoomableImageView.java

@@ -112,8 +112,16 @@ public class ZoomableImageView extends androidx.appcompat.widget.AppCompatImageV
         });
     }
 
-    public void setMaxZoom(float x) {
+    public boolean isZoomed(){
-        maxScale = x;
+        return saveScale > minScale;
+    }
+
+    public void restoreZoomNormal(){
+        float origScale = saveScale;
+        saveScale = minScale;
+        float mScaleFactor = minScale / origScale;
+        matrix.postScale(mScaleFactor, mScaleFactor, viewWidth/2, viewHeight/2);
+        fixTrans();
     }
 
     @Override
@@ -124,20 +132,17 @@ public class ZoomableImageView extends androidx.appcompat.widget.AppCompatImageV
     @Override
     public boolean onDoubleTap(MotionEvent e) {
         // Double tap is detected
-        float origScale = saveScale;
-        float mScaleFactor;
 
         if (saveScale >= maxScale) {
-            saveScale = minScale;
+            restoreZoomNormal();
-            mScaleFactor = minScale / origScale;
-            matrix.postScale(mScaleFactor, mScaleFactor, viewWidth/2, viewHeight/2);
         } else {
+            float origScale = saveScale;
             saveScale *= 1.5;
-            mScaleFactor = saveScale / origScale;
+            float mScaleFactor = saveScale / origScale;
             matrix.postScale(mScaleFactor, mScaleFactor, e.getX(), e.getY());
+            fixTrans();
         }
 
-        fixTrans();
         return false;
     }
 

app/src/main/native/gocryptfs_jni.c

@@ -31,7 +31,7 @@ void jbyteArray_to_unsignedCharArray(const jbyte* src, unsigned char* dst, const
 }
 
 JNIEXPORT jboolean JNICALL
-Java_sushi_hardcore_droidfs_util_GocryptfsVolume_00024Companion_create_1volume(JNIEnv *env, jclass clazz,
+Java_sushi_hardcore_droidfs_util_GocryptfsVolume_00024Companion_createVolume(JNIEnv *env, jclass clazz,
                                                                              jstring jroot_cipher_dir, jcharArray jpassword,
                                                                              jint logN,
                                                                              jstring jcreator) {
@@ -127,7 +127,7 @@ Java_sushi_hardcore_droidfs_util_GocryptfsVolume_00024Companion_init(JNIEnv *env
 }
 
 JNIEXPORT jboolean JNICALL
-Java_sushi_hardcore_droidfs_util_GocryptfsVolume_00024Companion_change_1password(JNIEnv *env, jclass clazz,
+Java_sushi_hardcore_droidfs_util_GocryptfsVolume_00024Companion_changePassword(JNIEnv *env, jclass clazz,
                                                                                jstring jroot_cipher_dir,
                                                                                jcharArray jold_password,
                                                                                jbyteArray jgiven_hash,