Merge branch 'material_buttons' of https://github.com/owncloud/android into material_fab
[pub/Android/ownCloud.git] / src / com / owncloud / android / ui / activity / FileDisplayActivity.java
index 1576a60..7a8f2a5 100644 (file)
@@ -79,13 +79,14 @@ import com.owncloud.android.lib.common.operations.RemoteOperationResult.ResultCo
 import com.owncloud.android.lib.common.utils.Log_OC;
 import com.owncloud.android.operations.CopyFileOperation;
 import com.owncloud.android.operations.CreateFolderOperation;
-import com.owncloud.android.operations.CreateShareOperation;
+import com.owncloud.android.operations.CreateShareViaLinkOperation;
+import com.owncloud.android.operations.CreateShareWithShareeOperation;
 import com.owncloud.android.operations.MoveFileOperation;
 import com.owncloud.android.operations.RefreshFolderOperation;
 import com.owncloud.android.operations.RemoveFileOperation;
 import com.owncloud.android.operations.RenameFileOperation;
 import com.owncloud.android.operations.SynchronizeFileOperation;
-import com.owncloud.android.operations.UnshareLinkOperation;
+import com.owncloud.android.operations.UnshareOperation;
 import com.owncloud.android.services.observer.FileObserverService;
 import com.owncloud.android.syncadapter.FileSyncAdapter;
 import com.owncloud.android.ui.dialog.ConfirmationDialogFragment;
@@ -99,6 +100,7 @@ import com.owncloud.android.ui.fragment.OCFileListFragment;
 import com.owncloud.android.ui.preview.PreviewImageActivity;
 import com.owncloud.android.ui.preview.PreviewImageFragment;
 import com.owncloud.android.ui.preview.PreviewMediaFragment;
+import com.owncloud.android.ui.preview.PreviewTextFragment;
 import com.owncloud.android.ui.preview.PreviewVideoActivity;
 import com.owncloud.android.utils.DisplayUtils;
 import com.owncloud.android.utils.ErrorMessageAdapter;
@@ -107,7 +109,6 @@ import com.owncloud.android.utils.UriUtils;
 
 import java.io.File;
 
-
 /**
  * Displays, what files the user has available in his ownCloud.
  */
@@ -147,7 +148,7 @@ public class FileDisplayActivity extends HookActivity
     private boolean mSyncInProgress = false;
 
     private static String DIALOG_UNTRUSTED_CERT = "DIALOG_UNTRUSTED_CERT";
-    private static String DIALOG_CREATE_FOLDER = "DIALOG_CREATE_FOLDER";
+    public static String DIALOG_CREATE_FOLDER = "DIALOG_CREATE_FOLDER";
     private static String DIALOG_UPLOAD_SOURCE = "DIALOG_UPLOAD_SOURCE";
     private static String DIALOG_CERT_NOT_SAVED = "DIALOG_CERT_NOT_SAVED";
 
@@ -174,7 +175,6 @@ public class FileDisplayActivity extends HookActivity
             mSyncInProgress = savedInstanceState.getBoolean(KEY_SYNC_IN_PROGRESS);
             mWaitingToSend = (OCFile) savedInstanceState.getParcelable(
                     FileDisplayActivity.KEY_WAITING_TO_SEND);
-           
         } else {
             mWaitingToPreview = null;
             mSyncInProgress = false;
@@ -212,7 +212,7 @@ public class FileDisplayActivity extends HookActivity
 
         mProgressBar.setIndeterminate(mSyncInProgress);
         // always AFTER setContentView(...) ; to work around bug in its implementation
-        
+
         setBackgroundText();
 
         Log_OC.v(TAG, "onCreate() end");
@@ -226,6 +226,13 @@ public class FileDisplayActivity extends HookActivity
     }
 
     @Override
+    protected void onStop() {
+        Log_OC.v(TAG, "onStop() start");
+        super.onStop();
+        Log_OC.v(TAG, "onStop() end");
+    }
+
+    @Override
     protected void onDestroy() {
         Log_OC.v(TAG, "onDestroy() start");
         super.onDestroy();
@@ -296,6 +303,7 @@ public class FileDisplayActivity extends HookActivity
                 listOfFiles.listDirectory(getCurrentDir());
                 // TODO Enable when "On Device" is recovered
                 // listOfFiles.listDirectory(getCurrentDir(), MainApp.getOnlyOnDevice());
+
             } else {
                 Log_OC.e(TAG, "Still have a chance to lose the initializacion of list fragment >(");
             }
@@ -307,9 +315,11 @@ public class FileDisplayActivity extends HookActivity
                 setSecondFragment(secondFragment);
                 updateFragmentsVisibility(true);
                 updateActionBarTitleAndHomeButton(file);
-                
+
             } else {
                 cleanSecondFragment();
+                if (file.isDown() && PreviewTextFragment.canBePreviewed(file))
+                    startTextPreview(file);
             }
 
         } else {
@@ -336,9 +346,11 @@ public class FileDisplayActivity extends HookActivity
                 secondFragment = new PreviewMediaFragment(file, getAccount(),
                         startPlaybackPosition, autoplay);
 
+            } else if (file.isDown() && PreviewTextFragment.canBePreviewed(file)) {
+                secondFragment = null;
             } else {
-                secondFragment = FileDetailFragment.newInstance(file, getAccount());
-            }
+            secondFragment = FileDetailFragment.newInstance(file, getAccount());
+        }
         }
         return secondFragment;
     }
@@ -455,6 +467,9 @@ public class FileDisplayActivity extends HookActivity
                         if (PreviewMediaFragment.canBePreviewed(mWaitingToPreview)) {
                             startMediaPreview(mWaitingToPreview, 0, true);
                             detailsFragmentChanged = true;
+                        } else if (PreviewTextFragment.canBePreviewed(mWaitingToPreview)) {
+                            startTextPreview(mWaitingToPreview);
+                            detailsFragmentChanged = true;
                         } else {
                             getFileOperationsHelper().openFile(mWaitingToPreview);
                         }
@@ -471,8 +486,6 @@ public class FileDisplayActivity extends HookActivity
     @Override
     public boolean onPrepareOptionsMenu(Menu menu) {
         boolean drawerOpen = mDrawerLayout.isDrawerOpen(GravityCompat.START);
-        menu.findItem(R.id.action_upload).setVisible(!drawerOpen);
-        menu.findItem(R.id.action_create_dir).setVisible(!drawerOpen);
         menu.findItem(R.id.action_sort).setVisible(!drawerOpen);
         menu.findItem(R.id.action_sync_account).setVisible(!drawerOpen);
         
@@ -483,6 +496,7 @@ public class FileDisplayActivity extends HookActivity
     public boolean onCreateOptionsMenu(Menu menu) {
         MenuInflater inflater = getMenuInflater();
         inflater.inflate(R.menu.main_menu, menu);
+        menu.findItem(R.id.action_create_dir).setVisible(false);
         return true;
     }
     
@@ -491,21 +505,10 @@ public class FileDisplayActivity extends HookActivity
     public boolean onOptionsItemSelected(MenuItem item) {
         boolean retval = true;
         switch (item.getItemId()) {
-            case R.id.action_create_dir: {
-                createFolder();
-                break;
-            }
             case R.id.action_sync_account: {
                 startSynchronization();
                 break;
             }
-            case R.id.action_upload: {
-                UploadSourceDialogFragment dialog =
-                        UploadSourceDialogFragment.newInstance(getAccount());
-                dialog.show(getSupportFragmentManager(), DIALOG_UPLOAD_SOURCE);
-
-                break;
-            }
             case android.R.id.home: {
                 FileFragment second = getSecondFragment();
                 OCFile currentDir = getCurrentDir();
@@ -648,7 +651,7 @@ public class FileDisplayActivity extends HookActivity
                             requestMoveOperation(fData, fResultCode);
                         }
                     },
-                    DELAY_TO_REQUEST_OPERATION_ON_ACTIVITY_RESULTS
+                    DELAY_TO_REQUEST_OPERATIONS_LATER
             );
 
         } else if (requestCode == ACTION_COPY_FILES && resultCode == RESULT_OK) {
@@ -662,7 +665,7 @@ public class FileDisplayActivity extends HookActivity
                             requestCopyOperation(fData, fResultCode);
                         }
                     },
-                    DELAY_TO_REQUEST_OPERATION_ON_ACTIVITY_RESULTS
+                    DELAY_TO_REQUEST_OPERATIONS_LATER
             );
 
         } else {
@@ -794,7 +797,26 @@ public class FileDisplayActivity extends HookActivity
 
     @Override
     public void onBackPressed() {
-        if (!isDrawerOpen()){
+        boolean isFabOpen = isFabOpen();
+        boolean isDrawerOpen = isDrawerOpen();
+
+        /*
+         * BackPressed priority/hierarchy:
+         *    1. close drawer if opened
+         *    2. close FAB if open (only if drawer isn't open)
+         *    3. navigate up (only if drawer and FAB aren't open)
+         */
+        if(isDrawerOpen && isFabOpen) {
+            // close drawer first
+            super.onBackPressed();
+        } else if(isDrawerOpen && !isFabOpen) {
+            // close drawer
+            super.onBackPressed();
+        } else if (!isDrawerOpen && isFabOpen) {
+            // close fab
+            getListOfFilesFragment().getFabMain().collapse();
+        } else {
+            // all closed
             OCFileListFragment listOfFiles = getListOfFilesFragment();
             if (mDualPane || getSecondFragment() == null) {
                 OCFile currentDir = getCurrentDir();
@@ -810,8 +832,6 @@ public class FileDisplayActivity extends HookActivity
                 setFile(listOfFiles.getCurrentFile());
             }
             cleanSecondFragment();
-        } else {
-            super.onBackPressed();
         }
     }
 
@@ -835,11 +855,9 @@ public class FileDisplayActivity extends HookActivity
     protected void onResume() {
         Log_OC.v(TAG, "onResume() start");
         super.onResume();
-
         // refresh Navigation Drawer account list
         mNavigationDrawerAdapter.updateAccountList();
 
-
         // refresh list of files
         refreshListOfFilesFragment();
 
@@ -867,6 +885,7 @@ public class FileDisplayActivity extends HookActivity
         registerReceiver(mDownloadFinishReceiver, downloadIntentFilter);
 
         Log_OC.v(TAG, "onResume() end");
+
     }
 
 
@@ -891,6 +910,14 @@ public class FileDisplayActivity extends HookActivity
         Log_OC.v(TAG, "onPause() end");
     }
 
+    public boolean isFabOpen() {
+        if(getListOfFilesFragment() != null && getListOfFilesFragment().getFabMain() != null && getListOfFilesFragment().getFabMain().isExpanded()) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
 
     private class SyncBroadcastReceiver extends BroadcastReceiver {
 
@@ -910,7 +937,7 @@ public class FileDisplayActivity extends HookActivity
                                 FileSyncAdapter.EXTRA_RESULT);
                 boolean sameAccount = (getAccount() != null &&
                         accountName.equals(getAccount().name) && getStorageManager() != null);
-    
+
                 if (sameAccount) {
 
                     if (FileSyncAdapter.EVENT_FULL_SYNC_START.equals(event)) {
@@ -931,6 +958,7 @@ public class FileDisplayActivity extends HookActivity
                                                    synchFolderRemotePath),
                                             Toast.LENGTH_LONG)
                                 .show();
+
                             browseToRoot();
 
                         } else {
@@ -959,8 +987,8 @@ public class FileDisplayActivity extends HookActivity
                                         .equals(event));
                                 
                         if (RefreshFolderOperation.EVENT_SINGLE_FOLDER_CONTENTS_SYNCED.
-                                    equals(event) &&
-                                /// TODO refactor and make common
+                                    equals(event) &&/// TODO refactor and make common
+
                                 synchResult != null && !synchResult.isSuccess() &&
                                 (synchResult.getCode() == ResultCode.UNAUTHORIZED ||
                                         synchResult.isIdPRedirection() ||
@@ -974,7 +1002,6 @@ public class FileDisplayActivity extends HookActivity
                                         new OwnCloudAccount(getAccount(), context);
                                 client = (OwnCloudClientManagerFactory.getDefaultSingleton().
                                         removeClientFor(ocAccount));
-
                                 if (client != null) {
                                     OwnCloudCredentials cred = client.getCredentials();
                                     if (cred != null) {
@@ -996,6 +1023,7 @@ public class FileDisplayActivity extends HookActivity
                             }
 
                         }
+
                     }
                     removeStickyBroadcast(intent);
                     Log_OC.d(TAG, "Setting progress visibility to " + mSyncInProgress);
@@ -1061,7 +1089,11 @@ public class FileDisplayActivity extends HookActivity
                         (uploadedRemotePath.startsWith(currentDir.getRemotePath()));
 
                 if (sameAccount && isDescendant) {
-                    refreshListOfFilesFragment();
+                    String linkedToRemotePath =
+                            intent.getStringExtra(FileDownloader.EXTRA_LINKED_TO_PATH);
+                    if (linkedToRemotePath == null || isAscendant(linkedToRemotePath)) {
+                        refreshListOfFilesFragment();
+                    }
                 }
 
                 boolean uploadWasFine = intent.getBooleanExtra(FileUploader.EXTRA_UPLOAD_RESULT,
@@ -1094,10 +1126,15 @@ public class FileDisplayActivity extends HookActivity
                         cleanSecondFragment();
                     }
 
-                    // Force the preview if the file is an image
-                    if (uploadWasFine && PreviewImageFragment.canBePreviewed(getFile())) {
-                        startImagePreview(getFile());
-                    } // TODO what about other kind of previews?
+                    // Force the preview if the file is an image or text file
+                    if (uploadWasFine) {
+                        OCFile ocFile = getFile();
+                        if (PreviewImageFragment.canBePreviewed(ocFile))
+                            startImagePreview(getFile());
+                        else if (PreviewTextFragment.canBePreviewed(ocFile))
+                            startTextPreview(ocFile);
+                        // TODO what about other kind of previews?
+                    }
                 }
 
                 mProgressBar.setIndeterminate(false);
@@ -1109,6 +1146,16 @@ public class FileDisplayActivity extends HookActivity
 
         }
 
+        // TODO refactor this receiver, and maybe DownloadFinishReceiver; this method is duplicated :S
+        private boolean isAscendant(String linkedToRemotePath) {
+            OCFile currentDir = getCurrentDir();
+            return (
+                    currentDir != null &&
+                            currentDir.getRemotePath().startsWith(linkedToRemotePath)
+            );
+        }
+
+
     }
 
 
@@ -1120,11 +1167,10 @@ public class FileDisplayActivity extends HookActivity
      */
     private class DownloadFinishReceiver extends BroadcastReceiver {
 
-        //int refreshCounter = 0;
         @Override
         public void onReceive(Context context, Intent intent) {
             try {
-                boolean sameAccount = isSameAccount(context, intent);
+                boolean sameAccount = isSameAccount(intent);
                 String downloadedRemotePath =
                         intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
                 boolean isDescendant = isDescendant(downloadedRemotePath);
@@ -1133,7 +1179,6 @@ public class FileDisplayActivity extends HookActivity
                     String linkedToRemotePath =
                             intent.getStringExtra(FileDownloader.EXTRA_LINKED_TO_PATH);
                     if (linkedToRemotePath == null || isAscendant(linkedToRemotePath)) {
-                        //Log_OC.v(TAG, "refresh #" + ++refreshCounter);
                         refreshListOfFilesFragment();
                     }
                     refreshSecondFragment(
@@ -1146,7 +1191,7 @@ public class FileDisplayActivity extends HookActivity
                 if (mWaitingToSend != null) {
                     mWaitingToSend =
                             getStorageManager().getFileByPath(mWaitingToSend.getRemotePath());
-                    if (mWaitingToSend.isDown()) { 
+                    if (mWaitingToSend.isDown()) {
                         sendDownloadedFile();
                     }
                 }
@@ -1175,7 +1220,7 @@ public class FileDisplayActivity extends HookActivity
             );
         }
 
-        private boolean isSameAccount(Context context, Intent intent) {
+        private boolean isSameAccount(Intent intent) {
             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
             return (accountName != null && getAccount() != null &&
                     accountName.equals(getAccount().name));
@@ -1194,7 +1239,6 @@ public class FileDisplayActivity extends HookActivity
             startSyncFolderOperation(root, false);
         }
         cleanSecondFragment();
-
     }
 
 
@@ -1273,7 +1317,7 @@ public class FileDisplayActivity extends HookActivity
             }
             // a new chance to get the mDownloadBinder through
             // getFileDownloadBinder() - THIS IS A MESS
-            OCFileListFragment listOfFiles = getListOfFilesFragment(); 
+            OCFileListFragment listOfFiles = getListOfFilesFragment();
             if (listOfFiles != null) {
                 listOfFiles.listDirectory();
                 // TODO Enable when "On Device" is recovered ?
@@ -1343,11 +1387,14 @@ public class FileDisplayActivity extends HookActivity
         } else if (operation instanceof CreateFolderOperation) {
             onCreateFolderOperationFinish((CreateFolderOperation) operation, result);
 
-        } else if (operation instanceof CreateShareOperation) {
-            onCreateShareOperationFinish((CreateShareOperation) operation, result);
+        } else if (operation instanceof CreateShareViaLinkOperation ||
+                    operation instanceof CreateShareWithShareeOperation ) {
 
-        } else if (operation instanceof UnshareLinkOperation) {
-            onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
+            refreshShowDetails();
+            refreshListOfFilesFragment();
+
+        } else if (operation instanceof UnshareOperation) {
+            onUnshareLinkOperationFinish((UnshareOperation) operation, result);
 
         } else if (operation instanceof MoveFileOperation) {
             onMoveFileOperationFinish((MoveFileOperation) operation, result);
@@ -1358,17 +1405,7 @@ public class FileDisplayActivity extends HookActivity
 
     }
 
-
-    private void onCreateShareOperationFinish(CreateShareOperation operation,
-                                              RemoteOperationResult result) {
-        if (result.isSuccess()) {
-            refreshShowDetails();
-            refreshListOfFilesFragment();
-        }
-    }
-
-
-    private void onUnshareLinkOperationFinish(UnshareLinkOperation operation,
+    private void onUnshareLinkOperationFinish(UnshareOperation operation,
                                               RemoteOperationResult result) {
         if (result.isSuccess()) {
             refreshShowDetails();
@@ -1389,6 +1426,9 @@ public class FileDisplayActivity extends HookActivity
                 if (details instanceof PreviewMediaFragment) {
                     // Refresh  OCFile of the fragment
                     ((PreviewMediaFragment) details).updateFile(file);
+                } else if (details instanceof PreviewTextFragment) {
+                    // Refresh  OCFile of the fragment
+                    ((PreviewTextFragment) details).updateFile(file);
                 } else {
                     showDetails(file);
                 }
@@ -1406,11 +1446,9 @@ public class FileDisplayActivity extends HookActivity
      */
     private void onRemoveFileOperationFinish(RemoveFileOperation operation,
                                              RemoteOperationResult result) {
-        dismissLoadingDialog();
-
         Toast msg = Toast.makeText(this,
                 ErrorMessageAdapter.getErrorCauseMessage(result, operation, getResources()),
-                Toast.LENGTH_LONG); 
+                Toast.LENGTH_LONG);
         msg.show();
 
         if (result.isSuccess()) {
@@ -1423,7 +1461,7 @@ public class FileDisplayActivity extends HookActivity
                 setFile(getStorageManager().getFileById(removedFile.getParentId()));
                 cleanSecondFragment();
             }
-            if (getStorageManager().getFileById(removedFile.getParentId()).equals(getCurrentDir())) {
+            if (getStorageManager().getFileById(removedFile.getParentId()).equals(getCurrentDir())){
                 refreshListOfFilesFragment();
             }
             invalidateOptionsMenu();
@@ -1446,10 +1484,8 @@ public class FileDisplayActivity extends HookActivity
     private void onMoveFileOperationFinish(MoveFileOperation operation,
                                            RemoteOperationResult result) {
         if (result.isSuccess()) {
-            dismissLoadingDialog();
             refreshListOfFilesFragment();
         } else {
-            dismissLoadingDialog();
             try {
                 Toast msg = Toast.makeText(FileDisplayActivity.this,
                         ErrorMessageAdapter.getErrorCauseMessage(result, operation, getResources()),
@@ -1471,10 +1507,8 @@ public class FileDisplayActivity extends HookActivity
      */
     private void onCopyFileOperationFinish(CopyFileOperation operation, RemoteOperationResult result) {
         if (result.isSuccess()) {
-            dismissLoadingDialog();
             refreshListOfFilesFragment();
         } else {
-            dismissLoadingDialog();
             try {
                 Toast msg = Toast.makeText(FileDisplayActivity.this,
                         ErrorMessageAdapter.getErrorCauseMessage(result, operation, getResources()),
@@ -1496,7 +1530,6 @@ public class FileDisplayActivity extends HookActivity
      */
     private void onRenameFileOperationFinish(RenameFileOperation operation,
                                              RemoteOperationResult result) {
-        dismissLoadingDialog();
         OCFile renamedFile = operation.getFile();
         if (result.isSuccess()) {
             FileFragment details = getSecondFragment();
@@ -1515,6 +1548,14 @@ public class FileDisplayActivity extends HookActivity
                     } else {
                         getFileOperationsHelper().openFile(renamedFile);
                     }
+                } else if (details instanceof PreviewTextFragment &&
+                        renamedFile.equals(details.getFile())) {
+                    ((PreviewTextFragment) details).updateFile(renamedFile);
+                    if (PreviewTextFragment.canBePreviewed(renamedFile)) {
+                        startTextPreview(renamedFile);
+                    } else {
+                        getFileOperationsHelper().openFile(renamedFile);
+                    }
                 }
             }
 
@@ -1525,7 +1566,7 @@ public class FileDisplayActivity extends HookActivity
         } else {
             Toast msg = Toast.makeText(this,
                     ErrorMessageAdapter.getErrorCauseMessage(result, operation, getResources()),
-                    Toast.LENGTH_LONG); 
+                    Toast.LENGTH_LONG);
             msg.show();
 
             if (result.isSslRecoverableException()) {
@@ -1542,6 +1583,7 @@ public class FileDisplayActivity extends HookActivity
                 OCFile syncedFile = operation.getLocalFile();
                 onTransferStateChanged(syncedFile, true, true);
                 invalidateOptionsMenu();
+                refreshShowDetails();
             }
         }
     }
@@ -1556,10 +1598,8 @@ public class FileDisplayActivity extends HookActivity
     private void onCreateFolderOperationFinish(CreateFolderOperation operation,
                                                RemoteOperationResult result) {
         if (result.isSuccess()) {
-            dismissLoadingDialog();
             refreshListOfFilesFragment();
         } else {
-            dismissLoadingDialog();
             try {
                 Toast msg = Toast.makeText(FileDisplayActivity.this,
                         ErrorMessageAdapter.getErrorCauseMessage(result, operation, getResources()),
@@ -1622,25 +1662,60 @@ public class FileDisplayActivity extends HookActivity
         return null;
     }
 
-    public void startSyncFolderOperation(OCFile folder, boolean ignoreETag) {
-        long currentSyncTime = System.currentTimeMillis();
-
-        mSyncInProgress = true;
-
-        // perform folder synchronization
-        RemoteOperation synchFolderOp = new RefreshFolderOperation( folder,
-                currentSyncTime,
-                false,
-                getFileOperationsHelper().isSharedSupported(),
-                ignoreETag,
-                getStorageManager(),
-                getAccount(),
-                getApplicationContext()
+    /**
+     * Starts an operation to refresh the requested folder.
+     *
+     * The operation is run in a new background thread created on the fly.
+     *
+     * The refresh updates is a "light sync": properties of regular files in folder are updated (including
+     * associated shares), but not their contents. Only the contents of files marked to be kept-in-sync are
+     * synchronized too.
+     *
+     * @param folder        Folder to refresh.
+     * @param ignoreETag    If 'true', the data from the server will be fetched and sync'ed even if the eTag
+     *                      didn't change.
+     */
+    public void startSyncFolderOperation(final OCFile folder, final boolean ignoreETag) {
+
+        // the execution is slightly delayed to allow the activity get the window focus if it's being started
+        // or if the method is called from a dialog that is being dismissed
+        getHandler().postDelayed(
+                new Runnable() {
+                    @Override
+                    public void run() {
+                        if (hasWindowFocus()) {
+                            long currentSyncTime = System.currentTimeMillis();
+                            mSyncInProgress = true;
+
+                            // perform folder synchronization
+                            RemoteOperation synchFolderOp = new RefreshFolderOperation(folder,
+                                    currentSyncTime,
+                                    false,
+                                    getFileOperationsHelper().isSharedSupported(),
+                                    ignoreETag,
+                                    getStorageManager(),
+                                    getAccount(),
+                                    getApplicationContext()
+                            );
+                            synchFolderOp.execute(
+                                    getAccount(),
+                                    MainApp.getAppContext(),
+                                    FileDisplayActivity.this,
+                                    null,
+                                    null
+                            );
+
+                            mProgressBar.setIndeterminate(true);
+
+                            setBackgroundText();
+
+                        }   // else: NOTHING ; lets' not refresh when the user rotates the device but there is
+                        // another window floating over
+                    }
+                },
+                DELAY_TO_REQUEST_OPERATIONS_LATER
         );
-        synchFolderOp.execute(getAccount(), MainApp.getAppContext(), this, null, null);
-        mProgressBar.setIndeterminate(true);
 
-        setBackgroundText();
     }
 
     /**
@@ -1695,7 +1770,6 @@ public class FileDisplayActivity extends HookActivity
         showDetailsIntent.putExtra(EXTRA_FILE, file);
         showDetailsIntent.putExtra(EXTRA_ACCOUNT, getAccount());
         startActivity(showDetailsIntent);
-
     }
 
     /**
@@ -1717,6 +1791,23 @@ public class FileDisplayActivity extends HookActivity
     }
 
     /**
+     * Stars the preview of a text file {@link OCFile}.
+     *
+     * @param file Text {@link OCFile} to preview.
+     */
+    public void startTextPreview(OCFile file) {
+        Bundle args = new Bundle();
+        args.putParcelable(EXTRA_FILE, file);
+        args.putParcelable(EXTRA_ACCOUNT, getAccount());
+        Fragment textPreviewFragment = Fragment.instantiate(getApplicationContext(),
+                PreviewTextFragment.class.getName(), args);
+        setSecondFragment(textPreviewFragment);
+        updateFragmentsVisibility(true);
+        //updateNavigationElementsInActionBar(file);
+        setFile(file);
+    }
+
+    /**
      * Requests the download of the received {@link OCFile} , updates the UI
      * to monitor the download progress and prepares the activity to preview
      * or open the file when the download finishes.