allow hiding/unhiding files from the fullscreen view too

app/src/main/kotlin/com/simplemobiletools/gallery/activities/ViewPagerActivity.kt

@@ -164,6 +164,8 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
             findItem(R.id.menu_edit).isVisible = getCurrentMedium()!!.isImage() == true
             findItem(R.id.menu_rotate).isVisible = getCurrentMedium()!!.isImage() == true
             findItem(R.id.menu_save_as).isVisible = mRotationDegrees != 0f
+            findItem(R.id.menu_hide).isVisible = !getCurrentMedium()!!.name.startsWith('.')
+            findItem(R.id.menu_unhide).isVisible = getCurrentMedium()!!.name.startsWith('.')
 
             findItem(R.id.menu_rotate).subMenu.apply {
                 clearHeader()
@@ -185,6 +187,8 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
             R.id.menu_copy_to -> copyTo()
             R.id.menu_move_to -> moveTo()
             R.id.menu_open_with -> openWith(getCurrentFile())
+            R.id.menu_hide -> toggleFileVisibility(true)
+            R.id.menu_unhide -> toggleFileVisibility(false)
             R.id.menu_share -> shareMedium(getCurrentMedium()!!)
             R.id.menu_delete -> askConfirmDelete()
             R.id.menu_rename -> renameFile()
@@ -229,6 +233,20 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
         }
     }
 
+    private fun toggleFileVisibility(hide: Boolean) {
+        toggleFileVisibility(getCurrentFile(), hide) {
+            val newFileName = it.absolutePath.getFilenameFromPath()
+            title = newFileName
+
+            getCurrentMedium()!!.apply {
+                name = newFileName
+                path = it.absolutePath
+                mMedia[mPos] = this
+            }
+            invalidateOptionsMenu()
+        }
+    }
+
     private fun saveImageAs() {
         val currPath = getCurrentPath()
         SaveAsDialog(this, currPath) {

app/src/main/kotlin/com/simplemobiletools/gallery/adapters/MediaAdapter.kt

@@ -13,7 +13,6 @@ import com.simplemobiletools.commons.dialogs.ConfirmationDialog
 import com.simplemobiletools.commons.dialogs.PropertiesDialog
 import com.simplemobiletools.commons.dialogs.RenameItemDialog
 import com.simplemobiletools.commons.extensions.beVisibleIf
-import com.simplemobiletools.commons.extensions.renameFile
 import com.simplemobiletools.gallery.R
 import com.simplemobiletools.gallery.activities.SimpleActivity
 import com.simplemobiletools.gallery.extensions.*
@@ -153,17 +152,7 @@ class MediaAdapter(val activity: SimpleActivity, var media: MutableList<Medium>,
         Thread({
             getSelectedMedia().forEach {
                 val oldFile = File(it.path)
-                val path = oldFile.parent
+                activity.toggleFileVisibility(oldFile, hide) {}
-                var filename = it.name
-                if (hide) {
-                    filename = ".${filename.trimStart('.')}"
-                } else {
-                    filename = filename.substring(1, filename.length)
-                }
-                val newFile = File(path, filename)
-                activity.renameFile(oldFile, newFile) {
-                    newFile.setLastModified(System.currentTimeMillis())
-                }
             }
             activity.runOnUiThread {
                 listener?.refreshItems()

app/src/main/kotlin/com/simplemobiletools/gallery/extensions/activity.kt

@@ -237,6 +237,21 @@ fun SimpleActivity.removeNoMedia(path: String, callback: () -> Unit) {
     }
 }
 
+fun SimpleActivity.toggleFileVisibility(oldFile: File, hide: Boolean, callback: (newFile: File) -> Unit) {
+    val path = oldFile.parent
+    var filename = oldFile.name
+    if (hide) {
+        filename = ".${filename.trimStart('.')}"
+    } else {
+        filename = filename.substring(1, filename.length)
+    }
+    val newFile = File(path, filename)
+    renameFile(oldFile, newFile) {
+        newFile.setLastModified(System.currentTimeMillis())
+        callback(newFile)
+    }
+}
+
 fun Activity.getFileSignature(path: String) = StringSignature(File(path).lastModified().toString())
 
 fun Activity.loadImage(path: String, target: MySquareImageView) {

app/src/main/kotlin/com/simplemobiletools/gallery/models/Medium.kt

@@ -10,7 +10,7 @@ import com.simplemobiletools.commons.helpers.SORT_DESCENDING
 import java.io.File
 import java.io.Serializable
 
-data class Medium(val name: String, var path: String, val video: Boolean, val modified: Long, val taken: Long, val size: Long) : Serializable, Comparable<Medium> {
+data class Medium(var name: String, var path: String, val video: Boolean, val modified: Long, val taken: Long, val size: Long) : Serializable, Comparable<Medium> {
     companion object {
         private val serialVersionUID = -6553149366975455L
         var sorting: Int = 0

app/src/main/res/menu/menu_viewpager.xml

@@ -50,6 +50,14 @@
         android:id="@+id/menu_open_with"
         android:title="@string/open_with"
         app:showAsAction="never"/>
+    <item
+        android:id="@+id/menu_hide"
+        android:title="@string/hide"
+        app:showAsAction="never"/>
+    <item
+        android:id="@+id/menu_unhide"
+        android:title="@string/unhide"
+        app:showAsAction="never"/>
     <item
         android:id="@+id/menu_edit"
         android:icon="@drawable/ic_edit"