Added hidden file warning message to the rename file dialog. Resolves #7722

Signed-off-by: William Plefka <wplefka2@illinois.edu>
Signed-off-by: Liam P <89549210+liam-p-23@users.noreply.github.com>

src/main/java/com/owncloud/android/ui/dialog/RenameFileDialogFragment.java

@@ -29,7 +29,9 @@ package com.owncloud.android.ui.dialog;
 import android.app.Dialog;
 import android.content.DialogInterface;
 import android.os.Bundle;
+import android.text.Editable;
 import android.text.TextUtils;
+import android.text.TextWatcher;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.Window;
@@ -55,7 +57,7 @@ import androidx.fragment.app.DialogFragment;
  *  Triggers the rename operation when name is confirmed.
  */
 public class RenameFileDialogFragment
-        extends DialogFragment implements DialogInterface.OnClickListener {
+    extends DialogFragment implements DialogInterface.OnClickListener {
 
     private static final String ARG_TARGET_FILE = "TARGET_FILE";
 
@@ -107,12 +109,40 @@ public class RenameFileDialogFragment
         ThemeTextInputUtils.colorTextInput(binding.userInputContainer,
                                            binding.userInput,
                                            ThemeColorUtils.primaryColor(getActivity()));
-        int selectionStart = 0;
-        int extensionStart = mTargetFile.isFolder() ? -1 : currentName.lastIndexOf('.');
-        int selectionEnd = extensionStart >= 0 ? extensionStart : currentName.length();
-        binding.userInput.setSelection(Math.min(selectionStart, selectionEnd), Math.max(selectionStart, selectionEnd));
+
+        binding.userInput.setSelection(0, getSelectionEndIndex(currentName));
         binding.userInput.requestFocus();
 
+        // Add TextChangedListener to the user input EditText
+        binding.inputWarningMessage.setText(R.string.hidden_file_name_warning);
+        binding.userInput.addTextChangedListener(new TextWatcher() {
+            @Override
+            public void afterTextChanged(Editable s) {
+
+            }
+
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+
+            }
+
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+                String newFileName = "";
+                if (binding.userInput.getText() != null) {
+                    newFileName = binding.userInput.getText().toString().trim();
+                }
+
+                if (!TextUtils.isEmpty(newFileName) &&
+                    TextUtils.isEmpty(newFileName.substring(0, getSelectionEndIndex(newFileName))) ) {
+                    binding.inputWarningMessage.setVisibility(View.VISIBLE);
+                }
+                else if(binding.inputWarningMessage.getVisibility() == View.VISIBLE) {
+                    binding.inputWarningMessage.setVisibility(View.GONE);
+                }
+            }
+        });
+
         // Build the dialog
         AlertDialog.Builder builder = new AlertDialog.Builder(requireActivity());
         builder.setView(view)
@@ -129,6 +159,14 @@ public class RenameFileDialogFragment
         return d;
     }
 
+    /**
+     * Calculate the end index of the actual file name (i.e. without the extension)
+     **/
+    private int getSelectionEndIndex(String fileName) {
+        int extensionStart = mTargetFile.isFolder() ? -1 : fileName.lastIndexOf('.');
+        return extensionStart >= 0 ? extensionStart : fileName.length();
+    }
+
 
     @Override
     public void onClick(DialogInterface dialog, int which) {
@@ -146,7 +184,6 @@ public class RenameFileDialogFragment
 
             if (!FileUtils.isValidName(newFileName)) {
                 DisplayUtils.showSnackMessage(requireActivity(), R.string.filename_forbidden_charaters_from_server);
-
                 return;
             }
 
@@ -159,4 +196,4 @@ public class RenameFileDialogFragment
         super.onDestroyView();
         binding = null;
     }
-}
+}

src/main/res/layout/edit_box_dialog.xml

@@ -21,7 +21,8 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:padding="@dimen/standard_padding">
+    android:padding="@dimen/standard_padding"
+    android:orientation="vertical">
 
     <com.google.android.material.textfield.TextInputLayout
         android:id="@+id/user_input_container"
@@ -43,4 +44,13 @@
 
     </com.google.android.material.textfield.TextInputLayout>
 
+    <TextView
+        android:id="@+id/input_warning_message"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text=""
+        android:textColor="@color/list_item_lastmod_and_filesize_text"
+        android:textSize="@dimen/two_line_secondary_text_size"
+        android:visibility="gone"/>
+
 </LinearLayout>

src/main/res/values/strings.xml

@@ -779,6 +779,7 @@
     <string name="file_rename">Rename</string>
     <string name="fab_label">Add or upload</string>
     <string name="account_creation_failed">Account creation failed</string>
+    <string name="hidden_file_name_warning">Name will result in a hidden file</string>
     <string name="single_sign_on_request_token" formatted="true">Allow %1$s to access your Nextcloud account %2$s?</string>
     <string name="permission_deny">Deny</string>
     <string name="permission_allow">Allow</string>