Add thread to load images

app/src/main/java/com/kunzisoft/keepass/activities/EntryActivity.kt

@@ -126,6 +126,7 @@ class EntryActivity : LockingActivity() {
         historyView = findViewById(R.id.history_container)
         entryContentsView = findViewById(R.id.entry_contents)
         entryContentsView?.applyFontVisibilityToFields(PreferencesUtil.fieldFontIsInVisibility(this))
+        entryContentsView?.setAttachmentCipherKey(mDatabase?.loadedCipherKey)
         entryProgress = findViewById(R.id.entry_progress)
         lockView = findViewById(R.id.lock_button)
 

app/src/main/java/com/kunzisoft/keepass/activities/EntryEditActivity.kt

@@ -198,7 +198,7 @@ class EntryEditActivity : LockingActivity(),
         // Build fragment to manage entry modification
         entryEditFragment = supportFragmentManager.findFragmentByTag(ENTRY_EDIT_FRAGMENT_TAG) as? EntryEditFragment?
         if (entryEditFragment == null) {
-            entryEditFragment = EntryEditFragment.getInstance(tempEntryInfo)
+            entryEditFragment = EntryEditFragment.getInstance(tempEntryInfo, mDatabase?.loadedCipherKey)
         }
         supportFragmentManager.beginTransaction()
                 .replace(R.id.entry_edit_contents, entryEditFragment!!, ENTRY_EDIT_FRAGMENT_TAG)

app/src/main/java/com/kunzisoft/keepass/activities/EntryEditFragment.kt

@@ -41,6 +41,7 @@ import com.kunzisoft.keepass.activities.lock.resetAppTimeoutWhenViewFocusedOrCha
 import com.kunzisoft.keepass.activities.stylish.StylishFragment
 import com.kunzisoft.keepass.adapters.EntryAttachmentsItemsAdapter
 import com.kunzisoft.keepass.database.element.Attachment
+import com.kunzisoft.keepass.database.element.Database
 import com.kunzisoft.keepass.database.element.DateInstant
 import com.kunzisoft.keepass.database.element.icon.IconImage
 import com.kunzisoft.keepass.education.EntryEditActivityEducation
@@ -86,6 +87,7 @@ class EntryEditFragment: StylishFragment() {
 
     // Elements to modify the current entry
     private var mEntryInfo = EntryInfo()
+    private var mBinaryCipherKey: Database.LoadedKey? = null
     private var mLastFocusedEditField: FocusedEditField? = null
     private var mExtraViewToRequestFocus: EditText? = null
 
@@ -127,6 +129,7 @@ class EntryEditFragment: StylishFragment() {
         attachmentsContainerView = rootView.findViewById(R.id.entry_attachments_container)
         attachmentsListView = rootView.findViewById(R.id.entry_attachments_list)
         attachmentsAdapter = EntryAttachmentsItemsAdapter(requireContext())
+        attachmentsAdapter.binaryCipherKey = arguments?.getSerializable(KEY_BINARY_CIPHER_KEY) as? Database.LoadedKey?
         attachmentsAdapter.onListSizeChangedListener = { previousSize, newSize ->
             if (previousSize > 0 && newSize == 0) {
                 attachmentsContainerView.collapse(true)
@@ -528,6 +531,7 @@ class EntryEditFragment: StylishFragment() {
     override fun onSaveInstanceState(outState: Bundle) {
         populateEntryWithViews()
         outState.putParcelable(KEY_TEMP_ENTRY_INFO, mEntryInfo)
+        outState.putSerializable(KEY_BINARY_CIPHER_KEY, mBinaryCipherKey)
         outState.putParcelable(KEY_LAST_FOCUSED_FIELD, mLastFocusedEditField)
 
         super.onSaveInstanceState(outState)
@@ -535,12 +539,15 @@ class EntryEditFragment: StylishFragment() {
 
     companion object {
         const val KEY_TEMP_ENTRY_INFO = "KEY_TEMP_ENTRY_INFO"
+        const val KEY_BINARY_CIPHER_KEY = "KEY_BINARY_CIPHER_KEY"
         const val KEY_LAST_FOCUSED_FIELD = "KEY_LAST_FOCUSED_FIELD"
 
-        fun getInstance(entryInfo: EntryInfo?): EntryEditFragment {
+        fun getInstance(entryInfo: EntryInfo?,
+                        loadedKey: Database.LoadedKey?): EntryEditFragment {
             return EntryEditFragment().apply {
                 arguments = Bundle().apply {
                     putParcelable(KEY_TEMP_ENTRY_INFO, entryInfo)
+                    putSerializable(KEY_BINARY_CIPHER_KEY, loadedKey)
                 }
             }
         }

app/src/main/java/com/kunzisoft/keepass/activities/ImageViewerActivity.kt

@@ -21,14 +21,15 @@ package com.kunzisoft.keepass.activities
 
 import android.content.Context
 import android.content.Intent
-import android.graphics.BitmapFactory
 import android.os.Bundle
 import android.util.Log
+import android.view.View
 import android.widget.ImageView
 import com.igreenwood.loupe.Loupe
 import com.kunzisoft.keepass.R
 import com.kunzisoft.keepass.activities.lock.LockingActivity
 import com.kunzisoft.keepass.database.element.Attachment
+import com.kunzisoft.keepass.database.element.Database
 import kotlinx.android.synthetic.main.activity_image_viewer.*
 
 class ImageViewerActivity : LockingActivity() {
@@ -38,13 +39,20 @@ class ImageViewerActivity : LockingActivity() {
 
         setContentView(R.layout.activity_image_viewer)
         val imageView: ImageView = findViewById(R.id.image_viewer_image)
+        val progressView: View = findViewById(R.id.image_viewer_progress)
 
         try {
+            progressView.visibility = View.VISIBLE
             intent.getParcelableExtra<Attachment>(IMAGE_ATTACHMENT_TAG)?.let { attachment ->
-                BitmapFactory.decodeStream(attachment.binaryAttachment.getUnGzipInputDataStream())?.let { imageBitmap ->
-                    imageView.setImageBitmap(imageBitmap)
-                } ?: finish()
+                Attachment.loadBitmap(attachment, Database.getInstance().loadedCipherKey) { bitmapLoaded ->
+                    if (bitmapLoaded == null) {
+                        finish()
+                    } else {
+                        progressView.visibility = View.GONE
+                        imageView.setImageBitmap(bitmapLoaded)
                     }
+                }
+            } ?: finish()
         } catch (e: Exception) {
             Log.e(TAG, "Unable to view the binary", e)
             finish()

app/src/main/java/com/kunzisoft/keepass/adapters/EntryAttachmentsItemsAdapter.kt

@@ -21,7 +21,7 @@ package com.kunzisoft.keepass.adapters
 
 import android.content.Context
 import android.content.res.TypedArray
-import android.graphics.BitmapFactory
+import android.graphics.Bitmap
 import android.graphics.Color
 import android.text.format.Formatter
 import android.util.TypedValue
@@ -33,6 +33,8 @@ import android.widget.TextView
 import androidx.recyclerview.widget.RecyclerView
 import com.kunzisoft.keepass.R
 import com.kunzisoft.keepass.activities.ImageViewerActivity
+import com.kunzisoft.keepass.database.element.Attachment
+import com.kunzisoft.keepass.database.element.Database
 import com.kunzisoft.keepass.database.element.database.CompressionAlgorithm
 import com.kunzisoft.keepass.model.AttachmentState
 import com.kunzisoft.keepass.model.EntryAttachmentState
@@ -42,8 +44,12 @@ import com.kunzisoft.keepass.model.StreamDirection
 class EntryAttachmentsItemsAdapter(context: Context)
     : AnimatedItemsAdapter<EntryAttachmentState, EntryAttachmentsItemsAdapter.EntryBinariesViewHolder>(context) {
 
+    var binaryCipherKey: Database.LoadedKey? = null
     var onItemClickListener: ((item: EntryAttachmentState)->Unit)? = null
 
+    // To manage image preview loading
+    private val imageBinariesSet = HashMap<Int, Bitmap?>()
+
     private var mTitleColor: Int
 
     init {
@@ -65,14 +71,27 @@ class EntryAttachmentsItemsAdapter(context: Context)
 
         holder.itemView.visibility = View.VISIBLE
         holder.binaryFileThumbnail.apply {
-            BitmapFactory.decodeStream(entryAttachmentState.attachment.binaryAttachment.getUnGzipInputDataStream())?.let { imageBitmap ->
-                setImageBitmap(imageBitmap)
+            // Show the bitmap image if loaded
+            if (imageBinariesSet.containsKey(position)) {
+                if (imageBinariesSet[position] != null) {
+                    setImageBitmap(imageBinariesSet[position])
+                }
+            } else {
+                imageBinariesSet[position] = null
+                // Load the bitmap image
+                Attachment.loadBitmap(entryAttachmentState.attachment, binaryCipherKey) { imageLoaded ->
+                    imageBinariesSet[position] = imageLoaded
+                    notifyItemChanged(position)
+                }
+            }
             setOnClickListener {
                 ImageViewerActivity.getInstance(context, entryAttachmentState.attachment)
             }
-                visibility = View.VISIBLE
-            } ?: run {
-                visibility = View.GONE
+            visibility = if (imageBinariesSet.containsKey(position)) {
+                setImageBitmap(imageBinariesSet[position])
+                View.VISIBLE
+            } else {
+                View.GONE
             }
         }
         holder.binaryFileBroken.apply {

app/src/main/java/com/kunzisoft/keepass/database/element/Attachment.kt

@@ -19,9 +19,12 @@
  */
 package com.kunzisoft.keepass.database.element
 
+import android.graphics.Bitmap
+import android.graphics.BitmapFactory
 import android.os.Parcel
 import android.os.Parcelable
 import com.kunzisoft.keepass.database.element.database.BinaryAttachment
+import kotlinx.coroutines.*
 
 data class Attachment(var name: String,
                       var binaryAttachment: BinaryAttachment) : Parcelable {
@@ -65,5 +68,25 @@ data class Attachment(var name: String,
         override fun newArray(size: Int): Array<Attachment?> {
             return arrayOfNulls(size)
         }
+
+        fun loadBitmap(attachment: Attachment,
+                       binaryCipherKey: Database.LoadedKey?,
+                       actionOnFinish: (Bitmap?) -> Unit) {
+            CoroutineScope(Dispatchers.Main).launch {
+                withContext(Dispatchers.IO) {
+                    val asyncResult: Deferred<Bitmap?> = async {
+                        runCatching {
+                            binaryCipherKey?.let { binaryKey ->
+                                BitmapFactory.decodeStream(attachment.binaryAttachment
+                                        .getUnGzipInputDataStream(binaryKey))
+                            }
+                        }.getOrNull()
+                    }
+                    withContext(Dispatchers.Main) {
+                        actionOnFinish(asyncResult.await())
+                    }
+                }
+            }
+        }
     }
 }

app/src/main/java/com/kunzisoft/keepass/database/element/Database.kt

@@ -346,14 +346,14 @@ class Database {
         this.loaded = true
     }
 
-    class LoadedKey(val key: Key, val iv: IvParameterSpec) {
+    class LoadedKey(val key: Key, val iv: ByteArray): Serializable {
         companion object {
             const val BINARY_CIPHER = "Blowfish/CBC/PKCS5Padding"
 
             fun generateNewCipherKey(): LoadedKey {
                 val iv = ByteArray(8)
                 SecureRandom().nextBytes(iv)
-                return LoadedKey(KeyGenerator.getInstance("Blowfish").generateKey(), IvParameterSpec(iv))
+                return LoadedKey(KeyGenerator.getInstance("Blowfish").generateKey(), iv)
             }
         }
     }

app/src/main/java/com/kunzisoft/keepass/database/element/database/BinaryAttachment.kt

@@ -32,6 +32,7 @@ import java.util.zip.GZIPOutputStream
 import javax.crypto.Cipher
 import javax.crypto.CipherInputStream
 import javax.crypto.CipherOutputStream
+import javax.crypto.spec.IvParameterSpec
 
 class BinaryAttachment : Parcelable {
 
@@ -101,7 +102,7 @@ class BinaryAttachment : Parcelable {
     private fun buildInputStream(file: File?, cipherKey: Database.LoadedKey): InputStream {
         return when {
             file != null && file.length() > 0 -> {
-                cipherDecryption.init(Cipher.DECRYPT_MODE, cipherKey.key, cipherKey.iv)
+                cipherDecryption.init(Cipher.DECRYPT_MODE, cipherKey.key, IvParameterSpec(cipherKey.iv))
                 Base64InputStream(CipherInputStream(FileInputStream(file), cipherDecryption), Base64.NO_WRAP)
             }
             else -> ByteArrayInputStream(ByteArray(0))
@@ -112,7 +113,7 @@ class BinaryAttachment : Parcelable {
     private fun buildOutputStream(file: File?, cipherKey: Database.LoadedKey): OutputStream {
         return when {
             file != null -> {
-                cipherEncryption.init(Cipher.ENCRYPT_MODE, cipherKey.key, cipherKey.iv)
+                cipherEncryption.init(Cipher.ENCRYPT_MODE, cipherKey.key, IvParameterSpec(cipherKey.iv))
                 BinaryCountingOutputStream(Base64OutputStream(CipherOutputStream(FileOutputStream(file), cipherEncryption), Base64.NO_WRAP))
             }
             else -> throw IOException("Unable to write in an unknown file")

app/src/main/java/com/kunzisoft/keepass/view/EntryContentsView.kt

@@ -35,6 +35,7 @@ import com.kunzisoft.keepass.R
 import com.kunzisoft.keepass.adapters.EntryAttachmentsItemsAdapter
 import com.kunzisoft.keepass.adapters.EntryHistoryAdapter
 import com.kunzisoft.keepass.database.element.Attachment
+import com.kunzisoft.keepass.database.element.Database
 import com.kunzisoft.keepass.database.element.DateInstant
 import com.kunzisoft.keepass.database.element.Entry
 import com.kunzisoft.keepass.database.element.security.ProtectedString
@@ -321,6 +322,10 @@ class EntryContentsView @JvmOverloads constructor(context: Context,
      * -------------
      */
 
+    fun setAttachmentCipherKey(cipherKey: Database.LoadedKey?) {
+        attachmentsAdapter.binaryCipherKey = cipherKey
+    }
+
     private fun showAttachments(show: Boolean) {
         attachmentsContainerView.visibility = if (show) View.VISIBLE else View.GONE
     }

app/src/main/res/layout/activity_image_viewer.xml

@@ -5,6 +5,11 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="?android:attr/windowBackground">
+    <ProgressBar
+        android:id="@+id/image_viewer_progress"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center" />
     <ImageView
         android:id="@+id/image_viewer_image"
         android:layout_width="match_parent"

app/src/main/res/layout/item_attachment.xml

@@ -31,17 +31,7 @@
     <androidx.constraintlayout.widget.ConstraintLayout
         android:id="@+id/constraintLayout"
         android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_alignParentBottom="true">
-
-        <androidx.appcompat.widget.AppCompatImageView
-            android:id="@+id/item_attachment_thumbnail"
-            android:layout_width="72dp"
-            android:layout_height="72dp"
-            android:src="@drawable/material_00_32dp"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toTopOf="parent" />
+        android:layout_height="wrap_content">
 
         <androidx.appcompat.widget.AppCompatImageView
             android:id="@+id/item_attachment_broken"
@@ -50,7 +40,7 @@
             android:contentDescription="@string/entry_attachments"
             android:src="@drawable/ic_attach_file_broken_white_24dp"
             app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintStart_toEndOf="@+id/item_attachment_thumbnail"
+            app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toTopOf="parent" />
 
         <androidx.appcompat.widget.AppCompatTextView
@@ -59,11 +49,23 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintEnd_toStartOf="@+id/item_attachment_size_container"
             app:layout_constraintStart_toEndOf="@+id/item_attachment_broken"
+            app:layout_constraintEnd_toStartOf="@+id/item_attachment_thumbnail"
             app:layout_constraintTop_toTopOf="parent"
             tools:text="BinaryFile.attach" />
 
+        <androidx.appcompat.widget.AppCompatImageView
+            android:id="@+id/item_attachment_thumbnail"
+            android:layout_width="48dp"
+            android:layout_height="48dp"
+            android:layout_marginStart="8dp"
+            android:layout_marginEnd="8dp"
+            android:scaleType="centerCrop"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toStartOf="@+id/item_attachment_size_container"
+            app:layout_constraintStart_toEndOf="@+id/item_attachment_title"
+            app:layout_constraintTop_toTopOf="parent" />
+
         <LinearLayout
             android:id="@+id/item_attachment_size_container"
             android:layout_width="wrap_content"