/* ownCloud Android client application
* Copyright (C) 2012-2013 ownCloud Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*
*/
package com.owncloud.android.ui.preview;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.List;
import android.accounts.Account;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BitmapFactory.Options;
import android.graphics.Point;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.view.Display;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.webkit.MimeTypeMap;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuInflater;
import com.actionbarsherlock.view.MenuItem;
import com.owncloud.android.R;
import com.owncloud.android.datamodel.FileDataStorageManager;
import com.owncloud.android.datamodel.OCFile;
import com.owncloud.android.lib.network.webdav.WebdavUtils;
import com.owncloud.android.lib.operations.common.OnRemoteOperationListener;
import com.owncloud.android.lib.operations.common.RemoteOperation;
import com.owncloud.android.lib.operations.common.RemoteOperationResult;
import com.owncloud.android.operations.RemoveFileOperation;
import com.owncloud.android.ui.activity.FileActivity;
import com.owncloud.android.ui.fragment.ConfirmationDialogFragment;
import com.owncloud.android.ui.fragment.FileFragment;
import com.owncloud.android.utils.Log_OC;
/**
* This fragment shows a preview of a downloaded image.
*
* Trying to get an instance with NULL {@link OCFile} or ownCloud {@link Account} values will produce an {@link IllegalStateException}.
*
* If the {@link OCFile} passed is not downloaded, an {@link IllegalStateException} is generated on instantiation too.
*
* @author David A. Velasco
*/
public class PreviewImageFragment extends FileFragment implements OnRemoteOperationListener,
ConfirmationDialogFragment.ConfirmationDialogFragmentListener {
public static final String EXTRA_FILE = "FILE";
public static final String EXTRA_ACCOUNT = "ACCOUNT";
private View mView;
private Account mAccount;
private FileDataStorageManager mStorageManager;
private ImageView mImageView;
private TextView mMessageView;
private ProgressBar mProgressWheel;
public Bitmap mBitmap = null;
private Handler mHandler;
private RemoteOperation mLastRemoteOperation;
private static final String TAG = PreviewImageFragment.class.getSimpleName();
private boolean mIgnoreFirstSavedState;
/**
* Creates a fragment to preview an image.
*
* When 'imageFile' or 'ocAccount' are null
*
* @param imageFile An {@link OCFile} to preview as an image in the fragment
* @param ocAccount An ownCloud account; needed to start downloads
* @param ignoreFirstSavedState Flag to work around an unexpected behaviour of {@link FragmentStatePagerAdapter}; TODO better solution
*/
public PreviewImageFragment(OCFile fileToDetail, Account ocAccount, boolean ignoreFirstSavedState) {
super(fileToDetail);
mAccount = ocAccount;
mStorageManager = null; // we need a context to init this; the container activity is not available yet at this moment
mIgnoreFirstSavedState = ignoreFirstSavedState;
}
/**
* Creates an empty fragment for image previews.
*
* MUST BE KEPT: the system uses it when tries to reinstantiate a fragment automatically (for instance, when the device is turned a aside).
*
* DO NOT CALL IT: an {@link OCFile} and {@link Account} must be provided for a successful construction
*/
public PreviewImageFragment() {
super();
mAccount = null;
mStorageManager = null;
mIgnoreFirstSavedState = false;
}
/**
* {@inheritDoc}
*/
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mHandler = new Handler();
setHasOptionsMenu(true);
}
/**
* {@inheritDoc}
*/
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
mView = inflater.inflate(R.layout.preview_image_fragment, container, false);
mImageView = (ImageView)mView.findViewById(R.id.image);
mImageView.setVisibility(View.GONE);
mView.setOnTouchListener((OnTouchListener)getActivity()); // WATCH OUT THAT CAST
mMessageView = (TextView)mView.findViewById(R.id.message);
mMessageView.setVisibility(View.GONE);
mProgressWheel = (ProgressBar)mView.findViewById(R.id.progressWheel);
mProgressWheel.setVisibility(View.VISIBLE);
return mView;
}
/**
* {@inheritDoc}
*/
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
if (!(activity instanceof FileFragment.ContainerActivity))
throw new ClassCastException(activity.toString() + " must implement " + FileFragment.ContainerActivity.class.getSimpleName());
}
/**
* {@inheritDoc}
*/
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
mStorageManager = new FileDataStorageManager(mAccount, getActivity().getApplicationContext().getContentResolver());
if (savedInstanceState != null) {
if (!mIgnoreFirstSavedState) {
setFile((OCFile)savedInstanceState.getParcelable(PreviewImageFragment.EXTRA_FILE));
mAccount = savedInstanceState.getParcelable(PreviewImageFragment.EXTRA_ACCOUNT);
} else {
mIgnoreFirstSavedState = false;
}
}
if (getFile() == null) {
throw new IllegalStateException("Instanced with a NULL OCFile");
}
if (mAccount == null) {
throw new IllegalStateException("Instanced with a NULL ownCloud Account");
}
if (!getFile().isDown()) {
throw new IllegalStateException("There is no local file to preview");
}
}
/**
* {@inheritDoc}
*/
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putParcelable(PreviewImageFragment.EXTRA_FILE, getFile());
outState.putParcelable(PreviewImageFragment.EXTRA_ACCOUNT, mAccount);
}
@Override
public void onStart() {
super.onStart();
if (getFile() != null) {
BitmapLoader bl = new BitmapLoader(mImageView, mMessageView, mProgressWheel);
bl.execute(new String[]{getFile().getStoragePath()});
}
}
/**
* {@inheritDoc}
*/
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
inflater.inflate(R.menu.file_actions_menu, menu);
List toHide = new ArrayList();
MenuItem item = null;
toHide.add(R.id.action_cancel_download);
toHide.add(R.id.action_cancel_upload);
toHide.add(R.id.action_download_file);
toHide.add(R.id.action_rename_file); // by now
// Options shareLink
if (!getFile().isShareByLink()) {
toHide.add(R.id.action_unshare_file);
}
for (int i : toHide) {
item = menu.findItem(i);
if (item != null) {
item.setVisible(false);
item.setEnabled(false);
}
}
}
/**
* {@inheritDoc}
*/
@Override
public void onPrepareOptionsMenu(Menu menu) {
super.onPrepareOptionsMenu(menu);
// Options shareLink
if (!getFile().isShareByLink()) {
MenuItem item = menu.findItem(R.id.action_unshare_file);
item.setVisible(false);
item.setEnabled(false);
}
}
/**
* {@inheritDoc}
*/
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_share_file: {
FileActivity act = (FileActivity)getSherlockActivity();
act.getFileOperationsHelper().shareFileWithLink(getFile(), act);
return true;
}
case R.id.action_unshare_file: {
FileActivity act = (FileActivity)getSherlockActivity();
act.getFileOperationsHelper().unshareFileWithLink(getFile(), act);
return true;
}
case R.id.action_open_file_with: {
openFile();
return true;
}
case R.id.action_remove_file: {
removeFile();
return true;
}
case R.id.action_see_details: {
seeDetails();
return true;
}
default:
return false;
}
}
private void seeDetails() {
((FileFragment.ContainerActivity)getActivity()).showDetails(getFile());
}
@Override
public void onResume() {
super.onResume();
}
@Override
public void onPause() {
super.onPause();
}
@Override
public void onDestroy() {
super.onDestroy();
if (mBitmap != null) {
mBitmap.recycle();
}
}
/**
* Opens the previewed image with an external application.
*
* TODO - improve this; instead of prioritize the actions available for the MIME type in the server,
* we should get a list of available apps for MIME tpye in the server and join it with the list of
* available apps for the MIME type known from the file extension, to let the user choose
*/
private void openFile() {
OCFile file = getFile();
String storagePath = file.getStoragePath();
String encodedStoragePath = WebdavUtils.encodePath(storagePath);
try {
Intent i = new Intent(Intent.ACTION_VIEW);
i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), file.getMimetype());
i.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
startActivity(i);
} catch (Throwable t) {
Log_OC.e(TAG, "Fail when trying to open with the mimeType provided from the ownCloud server: " + file.getMimetype());
boolean toastIt = true;
String mimeType = "";
try {
Intent i = new Intent(Intent.ACTION_VIEW);
mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(storagePath.substring(storagePath.lastIndexOf('.') + 1));
if (mimeType == null || !mimeType.equals(file.getMimetype())) {
if (mimeType != null) {
i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), mimeType);
} else {
// desperate try
i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), "*-/*");
}
i.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
startActivity(i);
toastIt = false;
}
} catch (IndexOutOfBoundsException e) {
Log_OC.e(TAG, "Trying to find out MIME type of a file without extension: " + storagePath);
} catch (ActivityNotFoundException e) {
Log_OC.e(TAG, "No activity found to handle: " + storagePath + " with MIME type " + mimeType + " obtained from extension");
} catch (Throwable th) {
Log_OC.e(TAG, "Unexpected problem when opening: " + storagePath, th);
} finally {
if (toastIt) {
Toast.makeText(getActivity(), "There is no application to handle file " + file.getFileName(), Toast.LENGTH_SHORT).show();
}
}
}
finish();
}
/**
* Starts a the removal of the previewed file.
*
* Shows a confirmation dialog. The action continues in {@link #onConfirmation(String)} , {@link #onNeutral(String)} or {@link #onCancel(String)},
* depending upon the user selection in the dialog.
*/
private void removeFile() {
ConfirmationDialogFragment confDialog = ConfirmationDialogFragment.newInstance(
R.string.confirmation_remove_alert,
new String[]{getFile().getFileName()},
R.string.confirmation_remove_remote_and_local,
R.string.confirmation_remove_local,
R.string.common_cancel);
confDialog.setOnConfirmationListener(this);
confDialog.show(getFragmentManager(), ConfirmationDialogFragment.FTAG_CONFIRMATION);
}
/**
* Performs the removal of the previewed file, both locally and in the server.
*/
@Override
public void onConfirmation(String callerTag) {
if (mStorageManager.getFileById(getFile().getFileId()) != null) { // check that the file is still there;
mLastRemoteOperation = new RemoveFileOperation( getFile(), // TODO we need to review the interface with RemoteOperations, and use OCFile IDs instead of OCFile objects as parameters
true,
mStorageManager);
mLastRemoteOperation.execute(mAccount, getSherlockActivity(), this, mHandler, getSherlockActivity());
((PreviewImageActivity) getActivity()).showLoadingDialog();
}
}
/**
* Removes the file from local storage
*/
@Override
public void onNeutral(String callerTag) {
OCFile file = getFile();
mStorageManager.removeFile(file, false, true); // TODO perform in background task / new thread
finish();
}
/**
* User cancelled the removal action.
*/
@Override
public void onCancel(String callerTag) {
// nothing to do here
}
private class BitmapLoader extends AsyncTask {
/**
* Weak reference to the target {@link ImageView} where the bitmap will be loaded into.
*
* Using a weak reference will avoid memory leaks if the target ImageView is retired from memory before the load finishes.
*/
private final WeakReference mImageViewRef;
/**
* Weak reference to the target {@link TextView} where error messages will be written.
*
* Using a weak reference will avoid memory leaks if the target ImageView is retired from memory before the load finishes.
*/
private final WeakReference mMessageViewRef;
/**
* Weak reference to the target {@link Progressbar} shown while the load is in progress.
*
* Using a weak reference will avoid memory leaks if the target ImageView is retired from memory before the load finishes.
*/
private final WeakReference mProgressWheelRef;
/**
* Error message to show when a load fails
*/
private int mErrorMessageId;
/**
* Constructor.
*
* @param imageView Target {@link ImageView} where the bitmap will be loaded into.
*/
public BitmapLoader(ImageView imageView, TextView messageView, ProgressBar progressWheel) {
mImageViewRef = new WeakReference(imageView);
mMessageViewRef = new WeakReference(messageView);
mProgressWheelRef = new WeakReference(progressWheel);
}
@SuppressWarnings("deprecation")
@SuppressLint({ "NewApi", "NewApi", "NewApi" }) // to avoid Lint errors since Android SDK r20
@Override
protected Bitmap doInBackground(String... params) {
Bitmap result = null;
if (params.length != 1) return result;
String storagePath = params[0];
try {
// set desired options that will affect the size of the bitmap
BitmapFactory.Options options = new Options();
options.inScaled = true;
options.inPurgeable = true;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.GINGERBREAD_MR1) {
options.inPreferQualityOverSpeed = false;
}
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.HONEYCOMB) {
options.inMutable = false;
}
// make a false load of the bitmap - just to be able to read outWidth, outHeight and outMimeType
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(storagePath, options);
int width = options.outWidth;
int height = options.outHeight;
int scale = 1;
Display display = getActivity().getWindowManager().getDefaultDisplay();
Point size = new Point();
int screenWidth;
int screenHeight;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.HONEYCOMB_MR2) {
display.getSize(size);
screenWidth = size.x;
screenHeight = size.y;
} else {
screenWidth = display.getWidth();
screenHeight = display.getHeight();
}
if (width > screenWidth) {
// second try to scale down the image , this time depending upon the screen size
scale = (int) Math.floor((float)width / screenWidth);
}
if (height > screenHeight) {
scale = Math.max(scale, (int) Math.floor((float)height / screenHeight));
}
options.inSampleSize = scale;
// really load the bitmap
options.inJustDecodeBounds = false; // the next decodeFile call will be real
result = BitmapFactory.decodeFile(storagePath, options);
//Log_OC.d(TAG, "Image loaded - width: " + options.outWidth + ", loaded height: " + options.outHeight);
if (result == null) {
mErrorMessageId = R.string.preview_image_error_unknown_format;
Log_OC.e(TAG, "File could not be loaded as a bitmap: " + storagePath);
}
} catch (OutOfMemoryError e) {
mErrorMessageId = R.string.preview_image_error_unknown_format;
Log_OC.e(TAG, "Out of memory occured for file " + storagePath, e);
} catch (NoSuchFieldError e) {
mErrorMessageId = R.string.common_error_unknown;
Log_OC.e(TAG, "Error from access to unexisting field despite protection; file " + storagePath, e);
} catch (Throwable t) {
mErrorMessageId = R.string.common_error_unknown;
Log_OC.e(TAG, "Unexpected error loading " + getFile().getStoragePath(), t);
}
return result;
}
@Override
protected void onPostExecute(Bitmap result) {
hideProgressWheel();
if (result != null) {
showLoadedImage(result);
} else {
showErrorMessage();
}
}
private void showLoadedImage(Bitmap result) {
if (mImageViewRef != null) {
final ImageView imageView = mImageViewRef.get();
if (imageView != null) {
imageView.setImageBitmap(result);
imageView.setVisibility(View.VISIBLE);
mBitmap = result;
} // else , silently finish, the fragment was destroyed
}
if (mMessageViewRef != null) {
final TextView messageView = mMessageViewRef.get();
if (messageView != null) {
messageView.setVisibility(View.GONE);
} // else , silently finish, the fragment was destroyed
}
}
private void showErrorMessage() {
if (mImageViewRef != null) {
final ImageView imageView = mImageViewRef.get();
if (imageView != null) {
// shows the default error icon
imageView.setVisibility(View.VISIBLE);
} // else , silently finish, the fragment was destroyed
}
if (mMessageViewRef != null) {
final TextView messageView = mMessageViewRef.get();
if (messageView != null) {
messageView.setText(mErrorMessageId);
messageView.setVisibility(View.VISIBLE);
} // else , silently finish, the fragment was destroyed
}
}
private void hideProgressWheel() {
if (mProgressWheelRef != null) {
final ProgressBar progressWheel = mProgressWheelRef.get();
if (progressWheel != null) {
progressWheel.setVisibility(View.GONE);
}
}
}
}
/**
* Helper method to test if an {@link OCFile} can be passed to a {@link PreviewImageFragment} to be previewed.
*
* @param file File to test if can be previewed.
* @return 'True' if the file can be handled by the fragment.
*/
public static boolean canBePreviewed(OCFile file) {
return (file != null && file.isImage());
}
/**
* {@inheritDoc}
*/
@Override
public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
if (operation.equals(mLastRemoteOperation) && operation instanceof RemoveFileOperation) {
onRemoveFileOperationFinish((RemoveFileOperation)operation, result);
}
}
private void onRemoveFileOperationFinish(RemoveFileOperation operation, RemoteOperationResult result) {
((PreviewImageActivity) getActivity()).dismissLoadingDialog();
if (result.isSuccess()) {
Toast msg = Toast.makeText(getActivity().getApplicationContext(), R.string.remove_success_msg, Toast.LENGTH_LONG);
msg.show();
finish();
} else {
Toast msg = Toast.makeText(getActivity(), R.string.remove_fail_msg, Toast.LENGTH_LONG);
msg.show();
if (result.isSslRecoverableException()) {
// TODO show the SSL warning dialog
}
}
}
/**
* Finishes the preview
*/
private void finish() {
Activity container = getActivity();
container.finish();
}
}