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