fix #231, add helper function for un/hiding items

app/build.gradle

@@ -45,7 +45,7 @@ ext {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:4.4.9'
+    implementation 'com.simplemobiletools:commons:4.4.10'
 
     implementation files('../libs/RootTools.jar')
 

app/src/main/kotlin/com/simplemobiletools/filemanager/adapters/ItemsAdapter.kt

@@ -66,6 +66,8 @@ class ItemsAdapter(activity: SimpleActivity, var fileDirItems: MutableList<FileD
             findItem(R.id.cab_copy_path).isVisible = isOneItemSelected()
             findItem(R.id.cab_open_with).isVisible = isOneFileSelected()
             findItem(R.id.cab_set_as).isVisible = isOneFileSelected()
+
+            checkHideBtnVisibility(this)
         }
     }
 
@@ -85,6 +87,8 @@ class ItemsAdapter(activity: SimpleActivity, var fileDirItems: MutableList<FileD
             R.id.cab_rename -> displayRenameDialog()
             R.id.cab_properties -> showProperties()
             R.id.cab_share -> shareFiles()
+            R.id.cab_hide -> toggleFileVisibility(true)
+            R.id.cab_unhide -> toggleFileVisibility(false)
             R.id.cab_copy_path -> copyPath()
             R.id.cab_set_as -> setAs()
             R.id.cab_open_with -> openWith()
@@ -123,6 +127,21 @@ class ItemsAdapter(activity: SimpleActivity, var fileDirItems: MutableList<FileD
 
     private fun isOneFileSelected() = isOneItemSelected() && !fileDirItems[selectedPositions.first()].isDirectory
 
+    private fun checkHideBtnVisibility(menu: Menu) {
+        var hiddenCnt = 0
+        var unhiddenCnt = 0
+        selectedPositions.mapNotNull { fileDirItems.getOrNull(it)?.name }.forEach {
+            if (it.startsWith(".")) {
+                hiddenCnt++
+            } else {
+                unhiddenCnt++
+            }
+        }
+
+        menu.findItem(R.id.cab_hide).isVisible = unhiddenCnt > 0
+        menu.findItem(R.id.cab_unhide).isVisible = hiddenCnt > 0
+    }
+
     private fun confirmSelection() {
         if (selectedPositions.isNotEmpty()) {
             val paths = getSelectedMedia().filter { !it.isDirectory }.map { it.path } as ArrayList<String>
@@ -160,6 +179,18 @@ class ItemsAdapter(activity: SimpleActivity, var fileDirItems: MutableList<FileD
         activity.sharePaths(paths)
     }
 
+    private fun toggleFileVisibility(hide: Boolean) {
+        Thread {
+            getSelectedMedia().forEach {
+                activity.toggleItemVisibility(it.path, hide)
+            }
+            activity.runOnUiThread {
+                listener?.refreshItems()
+                finishActMode()
+            }
+        }.start()
+    }
+
     private fun addFileUris(path: String, paths: ArrayList<String>) {
         if (activity.getIsPathDirectory(path)) {
             val shouldShowHidden = activity.config.shouldShowHidden

app/src/main/kotlin/com/simplemobiletools/filemanager/extensions/Activity.kt

@@ -5,6 +5,7 @@ import android.content.Intent
 import android.net.Uri
 import android.support.v4.content.FileProvider
 import com.simplemobiletools.commons.R
+import com.simplemobiletools.commons.activities.BaseSimpleActivity
 import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.isNougatPlus
 import com.simplemobiletools.filemanager.BuildConfig
@@ -46,3 +47,25 @@ fun Activity.openPath(path: String, forceChooser: Boolean, openAsText: Boolean =
 fun Activity.setAs(path: String) {
     setAsIntent(path, BuildConfig.APPLICATION_ID)
 }
+
+fun BaseSimpleActivity.toggleItemVisibility(oldPath: String, hide: Boolean, callback: ((newPath: String) -> Unit)? = null) {
+    val path = oldPath.getParentPath()
+    var filename = oldPath.getFilenameFromPath()
+    if ((hide && filename.startsWith('.')) || (!hide && !filename.startsWith('.'))) {
+        callback?.invoke(oldPath)
+        return
+    }
+
+    filename = if (hide) {
+        ".${filename.trimStart('.')}"
+    } else {
+        filename.substring(1, filename.length)
+    }
+
+    val newPath = "$path/$filename"
+    if (oldPath != newPath) {
+        renameFile(oldPath, newPath) {
+            callback?.invoke(newPath)
+        }
+    }
+}

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

@@ -21,6 +21,16 @@
         android:icon="@drawable/ic_share"
         android:title="@string/share"
         app:showAsAction="ifRoom"/>
+    <item
+        android:id="@+id/cab_hide"
+        android:icon="@drawable/ic_hide"
+        android:title="@string/hide"
+        app:showAsAction="ifRoom"/>
+    <item
+        android:id="@+id/cab_unhide"
+        android:icon="@drawable/ic_unhide"
+        android:title="@string/unhide"
+        app:showAsAction="ifRoom"/>
     <item
         android:id="@+id/cab_copy_path"
         android:title="@string/copy_path"